Installation Instructions

Transcription

1 48ES -A, 48EZ -A, 48VL -A, 48VT -A, 50ES -A, 50EZ -A, 50VL -A, 50VT -A 574D - -A, 674D - -A, 704D - -A, 604D - -A, A, A, A, A Installation Instructions SMALL PAKAGED PODUT (SPP) VETIAL EONOMIZE FATO INSTALLED OPTION NOTE: Airflow data can be found in unit installation installation instructions. SAFET ONSIDEATIONS Improper installation, adjustment, alteration, service maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause death, personal injury, or property damage. onsult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use factory -authorized kits or accessories when modifying this product. efer to the individual instructions packaged with the kits or accessories when installing. Follow all safety codes. Wear safety glasses, protective clothing, and work gloves. Have a fire extinguisher available. ead these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit. consult local building codes, the current editions of the National Fuel Gas ode (NFG) NFPA 54/ANSI Z., and the National Electrical ode (NE) NFPA 70. In anada refer to the current editions of the National Standards of anada AN/SA -B49. and. Natural Gas and Propane Installation codes, and anadian Electrical ode SA. ecognize safety information. This is the safety -alert symbol. When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury. Understand these signal words: DANGE, WANING, and AUTION. These words are used with the safety -alert symbol. DANGE identifies the most serious hazards which will result in severe personal injury or death. WANING signifies hazards which could result in personal injury or death. AUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation. TAE OF ONTENTS GENEAL... AESSOIES... INSTALLATION Small hassis Large hassis ONFIGUATION WIING DIAGAMS Air onditioner and Gas/Electric Models... Heat Pump and Dual Fuel... 4 Air onditioner and Gas Furnace Air onditioner and Gas Furnace Heat Pump and Dual Fuel Air onditioner Air onditioner Heat Pump Heat Pump OPEATION... 9 TOUESHOOTING... 0 SMALL HASSIS DIMENSIONAL DAWING... LAGE HASSIS DIMENSIONAL DAWING... VETIAL EONOMIZE (FATO INSTALLED OPTION) GENEAL Economizers are recommended for only commercial packaged products that have EM motors. The Economizer system utilizes the latest technology available for integrating the use of free cooling with mechanical cooling for rooftop units. The solid state control system optimizes energy consumption, zone comfort, and equipment cycling by operating the compressors when the outdoor air temperature is too warm, integrating the compressor with outdoor air when free cooling is available, and locking out the compressor when outdoor air temperature is too cold. Demand ventilation is supported. The Economizer system utilizes gear -drive technology with a direct-mount spring return actuator that will close upon loss of power. The Economizer system comes standard with an outdoor air temperature sensor, a supply air temperature sensor, and low temperature compressor lockout switch. Indoor enthalpy, outdoor enthalpy, and O sensors are available for field installation. Barometric relief dampers provide natural building pressurization control. Barometric relief dampers are built into the design and are standard. Table categorize the different models according to their chassis size and their respective coil type. Please follow the instructions according to your unit categorization. See Table for Hood Package contents. See Table for sensor usage. Table oil Type MODELS TPE SMALL LAGE / LAGE / STAIGHT BENT OIL OIL 50ES PA ES A EZ PHP EZ DF VL PA VL A VT PHP VT DF D PA D A D PHP D DF PA A PHP DF LEGEND DF --- Dual Fuel PA --- Packaged Air onditioner PHP --- Packaged Heat Pump A --- Packaged Air onditioner and Gas Furnace

2 EONOMIZE SMALL HASSIS Table Package ontents LAGE HASSIS Qty ontent Description Qty ontent Description Hood Side, ight Hood Side, ight Hood Side, Left Hood Side, Left Angle, Filter Angle, Filter 8 Aluminum Filter (0---/ x 6---/ x ) (5 x 49 x 5 mm) Screws (# x 5/8 w/seal Washer) Screws (# x /4 Type B Pan Head) APPLIATION Outdoor Air Dry Bulb Single Enthalpy Differential Enthalpy O for DV ontrol Using a Wall --- Mounted O Sensor O for DV ontrol Using a Duct --- Mounted O Sensor Aluminum Filter (0---/ x 6---/ x ) (5 x 49 x 5 mm) Screws 8 (# x 5/8 w/seal Washer) Screws (# x /4 Type B Pan Head) Bracket, Sensor Table Economizer Sensor Usage EONOMIZE WITH OUTDOO AI D BULB SENSO Accessories equired None, The outdoor air dry bulb sensor is factory installed. HH57A078 HH57A078 and ENTDIF004A00* ZSEN0 or GDXSEN004A00 ZSEN0 or GDXSEN004A00{ and ZASPO or GDXASP0000** or BDIOX005A00{ { *ENTDIF004A00 accessory is used on many different base units. As such, these kits may contain parts that will not be needed for installation. {ZSENO and GDXSEN004A00 are accessory O sensors. **ZASP0 AND GDXASP0000 are accessory aspirator boxes required for duct---mounted applications. {{BDIOX005A00 is an accessory that contains both ZSENO AND ZVASP0 accessories. AESSOIES The economizer has several field -installed accessories available to optimize performance. efer to Table 4 for authorized parts. Table 4 Accessory List DESIPTION PAT NUMBE Outdoor Air Enthalpy Sensor HH57A078 Indoor Air Enthalpy Sensor ENTDIF004A00 eturn Air O Sensor (4---0 ma) BDIOX005A00 O oom Sensor (4---0 ma) ZSENX0 Or GDXSEN004A00 Aspirator Box for duct Mount O Sensor ( ma) Space Temperature and O oom Sensor with Override (4---0mA) Space Temperature and O oom Sensor with Override and Set Point ( mA) Heat Pump elay Package ZASP0 Or GDXASP00A00 ZT550 ZT560 PLKIT00A00 INSTALLATION Small hassis To install the Vertical Economizer on the small chassis perform the following procedure:. Turn off unit power supply and install lockout tag.! WANING ELETIAL SHOK HAZAD Failure to follow this warning could result in personal injury or death. Before installing or servicing system, always turn off main power to system and tag. There may be more than one disconnect switch. Turn off accessory heater power switch if applicable.. emove economizer hood top panel from the return side of the unit. See Fig.. Keep screws and panel next to the unit.. Open economizer hood package found on the top skid. 4. emove red shipping tape that attaches the outside air temperature (OAT) sensor to the economizer assembly. Using two #8 fasteners, found in the hood package, attach the OAT sensor to the economizer according to Fig.. NOTE: See label attached to economizer for OAT installing details. 5. emove horizontal return duct cover panel and cut the wire ties that hold the hood divider to the economizer assembly. Slide hood divider off from the two slots holding it in place and place next to the unit. See Fig.. If you have a gas unit: Gas units have a flue hood attached to the hood divider. Unscrew the fastener holding the flue hood in place and dispose the screw. Follow unit s literature for flue hood installations. OAT Sensor Fig. - Economizer Hood Top Panel emoval Hood Top Panel A09689

3 OAT Sensor Fig. - Oat Sensor Installed A eplace horizontal return duct cover panel. Screw in place ensuring all seams are air and watertight. 7. Install the angle filter brackets to the right and left hood side panels respectively with the #0 screws provided. See Fig Assemble hood according to Fig. 5 screwing together with provided #0 sheet metal screws. 9. Install assembled hood over the economizer opening in the replacement return chamber panel. See Fig. 6. Screw in place through pre-punched holes. Make sure all seams are air watertight. NOTE: The two wires that connect to the outside air temperature sensor (OAT) should remain accessible. 0. onnect the outside air temperature sensor (OAT) to the economizer per wiring diagram.. Open the filter clips on the inside of the hood top. Insert the aluminum filter into the hood and close the clips to hold in place. See Fig. 7.. To replace x 0 x (04.8 mm x 508 mm x 5.4 mm) air filters, open the filter access door (horizontal return duct cover panel), remove old filters and install new disposable filters in filter rack. See Table 5 for filter part number. Table 5 Filter Part Number DESIPTION PAT NUMBE x 0 x Indoor oil Air Filter KH0AA (04.8 x 508 x 5.4 mm) *Unscrew the bracket on the top filter rack to fit ---in. (50.8 mm) filters. **If using in. (50.8 mm) field installed filters use () 0 x 0 in. (54.0 x 508 mm) and () x 0 in. (04.8 x 508 mm). NOTE: The economizer control settings and the filters are accessible through the filter access door.. Economizer controls are set to a standard factory setting. Nevertheless, you can adjust these settings through the filter access door. eview the settings in the Operation section: (.) The standard economizer controller has a factory setting of for the outdoor air temperature changeover and 6_F (7_) for the supply air (mixed air) temperature sensor. The outdoor air temperature changeover setting is adjusted on the sensor by setting the dip switches on the sensor. The ABD potentiometer on the economizer controller should be set to the D position. (.) The low ambient compressor lockout switch setting is fixed at 4_F (5.6_). (.) The minimum position for the outdoor air damper can be configured at the controller. When not using ao sensor, the DV Max potentiometer must be completely closed (W) for the Minimum Position potentiometer to function correctly. (4.) Settings for the optional outdoor enthalpy sensor, indoor enthalpy sensor, and O sensor can also be configured at the controller. 4. eplace the filter access panel. Screw in place ensuring all seams are air and watertight. 5. Install all economizer accessories then power HVA unit and test cycle economizer. EONOMIZE

4 Hood Divider (emoved) EONOMIZE Horizontal eturn Duct over Panel Hood Divider Fig. - Horizontal eturn Duct over Panel emoval A0969 Left Hood Side Panel ight Hood Side Panel Filter Angle Bracket Filter Angle Bracket Fig. 4 - Filter Angle Bracket Installation A0969 4

5 Hood Top Panel ight Hood Side Panel Left Hood Side Panel A0969 Fig Economizer Hood Assembly Filter lips Aluminum Filter A09695 A09694 Fig Filter Installation (See Through View) Fig Economizer Hood Installation Filter Access Panel Hoop Top Panel OAT Sensor A09696 Fig Economizer Hood Top Panel emoval 5 EONOMIZE Hood Divider

6 EONOMIZE Large hassis To install the Vertical Economizer on the large chassis perform the following procedure:. Turn off unit power supply and install lockout tag.! WANING ELETIAL SHOK HAZAD Failure to follow this warning could result in personal injury or death. Before installing or servicing system, always turn off main power to system and tag. There may be more than one disconnect switch. Turn off accessory heater power switch if applicable.. emove economizer hood top panel from the return side of the unit. See Fig. 8. Keep screws and panel next to the unit.. emove red shipping tape that attaches the outside air temperature (OAT) sensor to the economizer assembly and place sensor next to the unit. 4. emove horizontal return duct cover panel and cut the wire ties that hold the hood divider to the economizer assembly. Slide hood divider off from the two slots holding it in place and place next to the unit. See Fig. 9. If you have a gas unit: Gas units have a flue hood attached to the hood divider. Unscrew the fastener holding the flue hood in place and dispose the screw. Follow unit s literature for flue hood installations. 5. eplace horizontal return duct cover panel. Screw in place ensuring all seams are air and watertight. 6. Open economizer hood package found on the top skid. Mount OAT sensor to its assigned bracket by screwing together with provided two #8 fasteners. Afterwards install OAT sensor to the right side hood panel with the provided #0 screws. See Fig Install the angle filter brackets to the right and left hood side panels respectively with the #0 screws provided. See Fig.. 8. Assemble hood according to Fig. screwing together with provided #0 sheet metal screws. 9. Install assembled hood over the economizer opening in the replacement return chamber panel. See Fig.. Screw in place through pre-punched holes. Make sure all seams are watertight. NOTE: The two wires that connect to the outside air temperature sensor (OAT) should remain accessible. 0. onnect the outside air temperature sensor (OAT) to the economizer per wiring diagram. Hood Divider (emoved) Horizontal eturn Duct over Panel Hood Divider Fig. 9 - Horizontal eturn Duct over Panel and Hood Divider emoval A

7 Fig. 0 - OAT Bracket Installation A09698 EONOMIZE Left Hood Side Panel Filter Angle Bracket ight Hood Side Panel Filter Angle Bracket Left Hood Side Fig. - Filter Angle Bracket Installation ight Hood Side A

8 Hood Top Panel ight Hood Side Panel Left Hood Side Panel Hood Divider EONOMIZE Fig. - Hood Assembly Straight Indoor oil Air Filter Table 6 Filter Part Number DESIPTION 4 x 4 x (55.6 x x 5.4 mm) 6 x 4 x (406.4 x x 5.4 mm) PAT NUMBE A09700 KH0AA4 KH0AA6 *Unscrew two brackets on the top filter rack to fit ---in. (50.8 mm) filters. Bent Indoor oil Air Filter DESIPTION 6 x 4 x (406.4 x x 5.4 mm) 8 x 4 x (457. x x 5.4 mm) PAT NUMBE KH0AA6 KH0AA8 *Unscrew two brackets on the top filter rack to fit ---in. (50.8 mm) filters. **If using in. (50.8 mm) field installed filters use () 0 x 4 in. (54.0 x mm) and () 4 x 4 in. (55.6 x mm). ***Place 4 x 4 in. (55.6 x mm) filter at the right side of the coil and 0 x 4 in. (54.0 x mm) filters at the left side in this order. Fig. - Economizer Hood Installation A0970. Open the filter clips on the inside of the hood top. Insert the aluminum filter into the hood and close the clips to hold in place. See Fig. 4.. To replace air filters, open filter access door remove old filters and install new disposable filters in filter rack. See Table 6 for filter part numbers. IMPOTANT: On the the bent coil (See Table to determine coil type) filter rack, the 8 x 4 x (457. mm x mm x 5.4 mm) filter must be installed through the filter access door first then installthe6x4x(406.4 mm x mm x 5.4 mm) filter. NOTE: The economizer control settings and the filters are accessible through the filter access door. 8. Economizer controls are set to a standard factory setting. Nevertheless, you can adjust these settings through the filter access door. eview the settings in the Operation section: (.) The standard economizer controller has a factory setting of for the outdoor air temperature changeover and 6_F (7_) for the supply air (mixed air) temperature sensor. The outdoor air temperature changeover setting is adjusted on the sensor by setting the dip switches on the sensor. The ABD potentiometer on the economizer controller should be set to the D position. (.) The low ambient compressor lockout switch setting is fixed at 4_F (5.6_). (.) The minimum position for the outdoor air damper can be configured at the controller. When not using ao sensor, the DV Max potentiometer must be completely closed (W) for the Minimum Position potentiometer to function correctly. (4.) Settings for the optional outdoor enthalpy sensor, indoor enthalpy sensor, and O sensor can also be configured at the controller. 4. eplace the filter access panel. Screw in place ensuring all seams are air and watertight. 5. Install all economizer accessories then power HVA unit and test cycle economizer.

9 Aluminum Filter Filter lips Table 7 Supply Air Sensor Temperature/esistance Values TEMPEATUE (_F) ELSIUS (_) ESISTANE (OHMS) , , , , , , , , ,597 50, Supply Air Temperature Sensor (SAT) EONOMIZE Fig. 4 - Filter Installation (See through view) A09704 ONFIGUATION Economizer Standard Sensors OUTDOO AI TEMPEATUE (OAT) SENSO The outdoorairtemperaturesensor(hh57a080)isa 0 to 0mA device used to measure the outdoor-air temperature. The outdoor-air temperature is used to determine when the Economizer can be used for free cooling. The operating range of temperature measurement is 40 to 00_F (4.4 to 7.8_). The sensor has 8 selectable temperature changeover setpoints. The temperature changeover is set using dip switches on the sensor. The ABD potentiometer on the controller should be set to the D position. See Fig.. SUPPL AI TEMPEATUE (SAT) SENSO The supply air temperature sensor is a KΩ thermistor located at the inlet of the indoor fan. See Fig. 5. The operating range of temperature measurement is 0_ to 58_F (-7.8_ to 70_). See Table 7 for sensor temperature/resistance values. The temperature sensor looks like an eyelet terminal with wires running to it. The sensor is located in the crimp end and is sealed from moisture. Indoor Blower Fig. 5 - SAT Location A09707 LOW TEMPEATUE OMPESSO LOKOUT SWITH The Economizer is equipped with a low ambient temperature lockout switch located in the outdoor airstream which is used to lock out the compressors below a 4_F (5.6_) ambient temperature. Economizer ontrol Modes Determine the Economizer control mode before set up of the control. Some modes of operation may require different sensors. efer to Table. The Economizer is supplied from the factory with a supply air temperature sensor, a low temperature compressor lockout switch, and an outdoor air temperature sensor. This allows for operation of the Economizer with outdoor air dry bulb changeover control. Additional accessories can be added to allow for different types of changeover control and operation of the Economizer and unit. 9

10 OUTDOO D BULB HANGEOVE The standard controller is shipped from the factory configured foroutdoor dry bulb changeover control. The outdoor air and supply air temperature sensors are included as standard. For this control mode, the outdoor temperature is compared to a selectable set point on the sensor See Fig. 7. If the outdoor-air temperature is above the set point, the Economizer will adjust the outdoor air dampers to minimum position. If the outdoor-air temperature is below the set point, the position of the outdoor-air dampers will be controlled to provide free cooling using outdoor air. When in this mode, the LED next to the free cooling set point potentiometer will be on. The changeover temperature set point is set using the switches on the sensor. See Fig. 7 for the corresponding temperature changeover values. OUTDOO ENTHALP HANGEOVE For enthalpy control, accessory enthalpy sensor (part number HH57A078) is required. eplace the standard outdoor dry bulb temperature sensor with the accessory enthalpy sensor in the same mounting location. EONOMIZE EONOMIZE EXHAUST FAN SETPOINT LED LIGHTS WHEN EXHAUST ONTAT IS MADE MINIMUM DAMPE POSITION SETTING MAXIMUM DAMPE DEMAND ONTOL VENTILATION SETPOINT LED LIGHTS WHEN DEMAND ONTOL VENTILATION INPUT IS ABOVE SETPOINT DEMAND ONTOL VENTILATION SETPOINT LED LIGHTS WHEN OUTDOO AI IS SUITAE FO FEE OOLING ENTHALP HANGEOVE SETPOINT A09708 Fig. 6 - Economizer ontroller Potentiometer and LED Locations (8.9 ) (.7 ) (.8 ) (4.4 ) (7. ) ONTOL UVE ETUN AI SENSO ETUN DUT (FIELD-POVIDED) Fig. 8 - Enthalpy Sensor Mounting Location ONTOL POINT APPOX F ( ) AT 50% H A 7 () B 70 () 67 (9) D 6 (7) ENTHALP BTU PE POUND D AI () 40 (4) 65 (8) 60 (6) A 55 () B 50 (0) 45 D (7) 70 () 75 (4) (7) (9) () 0 95 (5) 00 (8) ELATIVE HUMIDIT (%) 0 05 (4) A (4) 0 (0 ) B D A (.8 ) (5.6 ) A04 Fig. 7 - Outdoor Air Temperature hangeover Set Points 5 () 40 (4) 45 (7) 50 (0) 55 () 60 (6) 65 (8) 70 () 75 (4) 80 (7) APPOXIMATE D BULB TEMPEATUE F ( ) 85 (9) 90 () 95 (6) Fig. 9 - Enthalpy hangeover Setpoints 00 (8) 05 (4) 0 (4) A097 0

11 Fig. 0 - O Sensor Maximum ange Setting N P T AQ+ SO+ N P T AQ S+ SO S V EXH V DV V Free ool B A Open EXH 0V Min Pos DV Max 0V DV 0V D Set Set T 4 Vac HOT 800 ppm 900 ppm 000 ppm 00 ppm T 4 Vac OM EF Fig. - Economizer ontroller 5 4 EF A097 A097 When the outdoor air enthalpy rises above the outdoor enthalpy changeover set point, the outdoor-air damper moves to its minimum position. The outdoor enthalpy changeover set point is set with the outdoor enthalpy set point potentiometer on the Economizer controller. The set points are A, B,, and D. See Fig. 9. The factory -installed 60 -ohm jumper must be in place across terminals S and S+ on the Economizer controller. See Fig. and Fig. or Fig.. DIFFEENTIAL ENTHALP ONTOL For differential enthalpy control, the Economizer controller uses two enthalpy sensors (HH57A078 and ENTDIF004A00), one in the outside air and one in the return airstream. The Economizer controller compares the outdoor air enthalpy to the return air enthalpy to determine Economizer use. The controller selects the lower enthalpy air (return or outdoor) for cooling. For example, when the outdoor air has a lower enthalpy than the return air and is below the set point, the Economizeropensto bring in outdoorairfor freecooling. eplacethe standard outside air dry bulb temperature sensor with the accessory enthalpy sensor in the same mounting location. Mount the return air enthalpy sensor in the return air duct. See Fig. 8. When using this mode of changeover control, turn the enthalpy set point potentiometer fully clockwise to the D setting. INDOO AI QUALIT (IAQ) SENSO INPUT The IAQ input can beused fordemand control ventilation control based on the level of O measured in the space or return air duct. Mount the accessory IAQ sensor according to manufacturer specifications. The IAQ sensor should be wired to the AQ and AQ terminals of the controller. Adjust the DV potentiometers to correspond to the DV voltage output of the indoor air quality sensor at the user determined set point. See Fig. 0. If a separate field -supplied transformer is used to power the IAQ sensor, the sensor must not be grounded or the Economizer control board will be damaged. EXHAUST SET POINT ADJUSTMENT The exhaust set point will determine when the exhaust fan runs based on damper position (if power exhaust is installed). The set point is modified with the Exhaust Fan Set Point (EXH SET) potentiometer. See Fig. or for Wiring Diagram. The set point represents the damper position above which the exhaust fans will be turned on. When there is a call for exhaust, the Economizer controller provides a 45 ± 5 second delay before exhaustfan activation to allow the dampersto open.this delay allows the damper to reach the appropriate position to avoid unnecessary fan overload. MINIMUM POSITION ONTOL There is a minimum damper position potentiometer on the Economizer controller. See Fig. 6 and Fig. or. The minimum damper position maintains the minimum airflow into the building during the occupied period. When using demand ventilation, the minimum damper position represents the minimum ventilation position for VO (volatile organic compound)ventilation requirements. The DV Max potentiometer must be fully closed (W) to allow the minimum position potentiometer to function correctly. When demand ventilation control is not being used, the minimum position potentiometer should beused to set the occupied ventilation position. The maximum demand ventilation position should be turned fully clockwise. Adjust the minimum position potentiometer to allow the minimum amount of outdoor air, as required by local codes, to enter the building. Make minimum position adjustments with at least 0_F (._) temperature difference between the outdoor and return -air temperatures. To determine the minimum position setting, perform the following procedure:. alculate the appropriate mixed air temperature using the following formula: (T o x OA/00) + (T x A/00) = T M T O = Outdoor-Air Temperature OA = Percent of Outdoor Air T = eturn -Air Temperature A = Percent of eturn Air T M = Mixed -Air Temperature As an example, if local codes require 0% outdoor air during occupied conditions, outdoor-air temperature is 60_F (5.6_), and return -air temperature is 75_F (.9_). (60 x.0) + (75 x.90) = 7.5_F (._). Disconnect the supply air sensor from terminals T and T.. Ensure that the factory -installed jumper is in place across terminals P and P. If remote damper positioning is being used, make sure that the terminals are wired according to Fig. or Fig. and that the minimum position potentiometer is turned fully clockwise. 4. onnect 4 vac across terminals T and T. 5. arefully adjust the minimum position potentiometer until the measured mixed -air temperature matches the calculated value. 6. econnect the supply air sensor to terminals T and T. emote control of the Economizer damper is desirable when requiring additional temporary ventilation. If a field -supplied remote potentiometer (Honeywell part number S96B8) is wired to the Economizer controller, the minimum position of the damper can be controlled from a remote location. To control the minimum damper position remotely, remove the factory installed jumper on the P and P terminals on the Economizer controller. EONOMIZE

12 EONOMIZE Wire the field -supplied potentiometer to the P and P terminals on the Economizer controller. See Fig. and Fig. or. DAMPE MOVEMENT Damper movement from full open to full closed (or vice versa) takes / minutes. THEMOSTATS The Economizer control works with conventional thermostats that have a (cool stage ), (coolstage ),W (heatstage), W (heat stage), and G (fan).the Economizercontrol does not support space temperature sensors. onnections are made at the thermostat terminal connection board located in the main control box. OUPAN ONTOL The factory default configuration for the Economizer control is occupied mode. Occupied status is provided by the black jumper from terminal T to terminal N. When unoccupied mode is desired, install a field supplied time clock function in place of the jumper between T and N. See Fig. or. When the time clock contacts are closed, the Economizer control will be in occupied mode. When the time clock contacts are open (removing the 4 -v signal from terminal N), the Economizer will be in unoccupied mode. DEMAND ONTOLLED VENTILATION (DV) When using the Economizer for demand controlled ventilation, there are some equipment selection criteria which should be considered.when selecting the heat capacity and cool capacity of the equipment, the maximum ventilation rate must be evaluated for design conditions. The maximum damper position must be calculated to provide the desired fresh air. Typically the maximum ventilation rate will be about 5 to 0% more than the typical FM required per person, using normal outside air design criteria. An exponential anticipatory strategy should be taken with the following conditions: a zone with alargearea, varied occupancy, and equipmentthatcannot exceed the required ventilation rate at design conditions. Exceeding the required ventilation rate means the equipment can condition air at a maximum ventilation rate that is greater than the required ventilation rate for maximum occupancy. An exponential-anticipatory strategy will causethefresh airsupplied to increaseasthe room O level increases even though the O set point has not been reached. By the time the O level reaches the set point, the damper will be at maximum ventilation and should maintain the setpoint. In order to have theo sensor control the economizer damper in this manner, first determine the damper voltage output for minimum or base ventilation. Base ventilation is the ventilation required to remove contaminants during unoccupied periods. The following equation may be used to determine the percent of outside-air entering the building for a given damper position. For best results there should be at least a 0_F (._) difference in outside and return -air temperatures. (T o x OA/00) + (T x A/00) = T M T O = Outdoor-Air Temperature OA = Percent of Outdoor Air T = eturn -Air Temperature A = Percent of eturn Air T M = Mixed -Air Temperature Once base ventilation has been determined, set the minimum damper position potentiometer to the correct position. The same equation can be used to determine the occupied or maximum ventilation rate to the building. For example, an output of.6 volts to the actuator provides a base ventilation rate of 5% and an output of 6.7 volts provides the maximum ventilation rate of 0% (or base plus 5 FM per person). Use Fig. 0 to determine the maximum setting of the O sensor. For example, a 00 ppm set point relates to a 5 FM per person design. Use the 00 ppm curve on Fig. 0 to find the point when the O sensor output will be 6.7 volts. Line up the point on the graph with the left side of the chart to determine that the range configuration for the O sensor should be 800 ppm. The Economizer controller will output the 6.7 volts from the O sensor to the actuatorwhen theo concentration in the space is at 00 ppm. The DV set point may be left at volts since the O sensor voltage will be ignored by the Economizer controller until it rises above the.6 volt setting of the minimum position potentiometer. Once the fully occupied damper position has been determined, set the maximum damper demand control ventilation potentiometer to this position. Do not set to the maximum position as this can result in over ventilation to the space and potential high -humidity levels. O SENSO ONFIGUATION The O sensor has preset standard voltage settings that can be selected anytime after the sensor is powered up. Use setting or for equipment. See Table 8.. Press lear and Mode buttons. Hold at least 5 seconds until the sensor enters the Edit mode.. Press Mode twice. The STDSET Menu will appear.. Use the Up/Down button to select the preset number. See Table Press Enter to lock in the selection. 5. Press Mode to exit and resume normal operation. The custom settings of the O sensor can be changed anytime after the sensor is energized. Follow the steps below to change the nonstandard settings:. Press lear and Mode buttons. Hold at least 5 seconds until the sensor enters the Edit mode.. Press Mode twice. The STDSET Menu will appear.. Use the Up/Down button to toggle to the NONSTD menu and press Enter. 4. Use the Up/Down button to toggle through each of the nine variables, starting with Altitude, until the desired setting is reached. 5. Press Mode to move through the variables. 6. Press Enter to lock in the selection, then press Mode to continue to the next variable. DEHUMIDIFIATION OF FESH AI WITH DV ONTOL Information from ASHAE indicates that the largest humidity load on any zone is the fresh air introduced. For some applications, an energy recovery unit can be added to reduce the moisture content of the fresh air being brought into the building when the enthalpy is high. In most cases, the normal heating and cooling processes are more than adequate to remove the humidity loads for most commercial applications. If normal rooftop heating and cooling operation is not adequate for the outdoor humidity level, an energy recovery unit and/or a dehumidification option should be considered.

13 EONOMIZE Fig. - Economizer Wiring Diagram for Packaged Air onditioner and Gas/Electric Models A0098

14 EONOMIZE POTENTIOMETE DEFAULTS SETTINGS: POWE EXHAUST MIDDLE MINIMUM POS. /4 OPEN DV MAX. FULL LOSED DV SET MIDDLE ENTHALP SETTING WIING FO HEAT PUMP AND DUAL FUEL MODELS PNK VIO K K (FIELD AESSO) EMOTE MIN POSITION POT EMOTE POT (5 Ohm) N P T K N P T EXH V OPEN 0V EXH SET MIN POS EONOMIZE IV BOAD T 4 Vac HOT T 4Vac OM + - K WHT ED EONOMIZE MOTO SEE NOTE 6 PL6- FO STD UNIT SAT V -STAGE T-STAT E W G O FIELD INSTALLED IAQ SENSO IAQ OAT TEMP/ ENTHALP SENSO + (FIELD AESSO) ENTHALP SENSO + K ED AQ AQ SO+ S+ 60k SO S FEE OOL DV V V B A 0V 0V DV D DV MAX SET EF 5 4 EF FIELD SPLIE G EL U FIELD SPLIE BN LA (NOT USED) (NOT USED) PINK ED BN PINK EL G LOW OM (NOT USED) TAN G IFB 5 K TO PW EXHAUST AESSO OG (NOT USED) 9 NOTES:. 60 OHM, WATT 5% ESISTO SHOULD BE EMOVED ONL WHEN USING DIFFEENTIAL ENTHALP O D BULB.. IF A SEPAATE FIELD SUPPLIED 4V TANSFOME IS USED FO THE IAQ SENSO POWE SUPPL, IT ANNOT HAVE THE SEONDA OF THE TANSFOME GOUNDED.. FO FIELD INSTALLED EMOTE MINIMUM POSITION POT, EMOVE AK WIE JUMPE BETWEEN P AND P AND SET ONTOL MINIMUM POSITION POT TO THE MINIMUM POSITION. 4. FO HEAT PUMP UNITS THE AVAILAE ELA PAKAGE PLKIT00A00 AN BE ODEED AND FIELD INSTALLED. ONTATO MA POVIDE ELAS AND WIE AODING TO THIS DIAGAM. ELAS MUST BE: -SPDT, ONE POLE NOMALL OPEN, ONE POLE NOMALL LOSED. SAME POLAIT. MINIMUM 5VA INUSH. 5. WIING FATO INSTALLED. FIELD ONNETION TO AVAILAE ELA KIT O FIELD SUPPLIED ELAS EQUIED. 6. FO VETIAL EONOMIZE THE EONOMIZE MOTO ONNETIONS AE AS SHOWN.FO HOIZONTAL EONOMIZE THE EONOMIZE MOTO IS ATTAHED TO THE EONOMIZE IV BOAD, (THE WIES SHOWN AE NOT UTILIZED K,WHT & ED) 7. WHEN NOT USING A O SENSO, THE DV MAX POTENTIOMETE MUST BE OMPLETEL LOSED (W) FO THE MINIMUM POSITION POTENTIOMETE TO FUNTION OETL. P DB S S 7 6 U U ON WHT ED A A B B BN EL SEE NOTE 5 EL LEGEND SPLIE FATO WIING FIELD O AESSO ONTOL WIING OMPESSO ONTATO DB DEFOST BOAD IAQ INDOO AI QUALIT SENSOS IFB INDOO FAN BOAD LA LOW AMBIENT LOKOUT OAT OUTDOO AI TEMPEATUE SENSO POT POTENTIOMETE ELA (FO HPS) ELA (FO HPS) SAT SUPPL AI TEMPEATUE SENSO * AEPTAE ELAS INLUDE: HONEWELL - 8B7 HONEWELL - 4B4 WHITE ODGES WHITE ODGES * * AND ELAS AE PAT OF THE AVAILAE PLKIT00A00 ELA KIT O AN BE FIELD POVIDED AND INSTALLED. 50SD50005 OWE MOTO K SPEEDTAB HIGH Fig. - Economizer Wiring Diagram for Packaged Heat Pump and Dual Fuel Models A0059 4

15 EONOMIZE Fig. 4 - Packaged Air onditioner and Gas Furnace Units onnection Wiring Diagram 0 - A007 5

16 EONOMIZE Fig. 5 ont. - Packaged Air onditioner and Gas Furnace Units Ladder Wiring Diagram 0 - A007 6

17 EONOMIZE Fig. 5 - Packaged Air onditioner and Gas Furnace Units onnection Wiring Diagram A0087 7

18 EONOMIZE Fig. 6 ont. - Packaged Air onditioner and Gas Furnace Units Ladder Wiring Diagram A0087 8

19 ONNETION WIING DIAGAM DANGE: ELETIAL SHOK HAZAD DISONNET POWE BEFOE SEVIING NOTES:. IF AN OF THE OIGINAL WIES FUNISHED AE EPLAED, THE MUST BE EPLAED WITH THE SAME WIE O ITS EQUIVALENT.. SEE PIE PAGES FO THEMOSTATS.. USE 75 DEG. OPPE ONDUTOS FO FIELD INSTALLATION. 4. SEE INSTALLATION INSTUTIONS FO POPE HEATING AND OOLING ONNETIONS FO OU UNIT. INDOO FAN MOTO PLUGS - "DO NOT DISONNET UNDE LOAD" 5. THIS FUSE IS MANUFATUED B LITTELFUSE, P/N THIS FUSE IS MANUFATUED B LITTELFUSE, P/N INDUE APAITO AND WIING ON ETAIN MODELS ONL. IF AP IS PESENT, ELLOW WIES FOM IG AND IDM ONNET ON SAME SIDE OF AP. 8. EMOVE ELLOW SPLIE WIE WHEN EONOMIZE AND EONOMIZE ELAS AE USED AND ONNET TO ELA AS SHOWN. 9. WHEN EONOMIZE AND EONOMIZE ELAS AE USED, ONNET THE ELLOW AND AK WIES TO ELA AS SHOWN. ELA KIT EQUIED WITH EONOMIZE AND HEAT PUMP/DUAL FUEL UNITS. 0. WHEN EONOMIZE AND EONOMIZE ELAS AE USED, INSTALL WIES AS SHOWN ONTO THE OILS OF ELA AND ELA.. DEHUMIDIFIATION FEATUE ANNOT BE USED WHEN EONOMIZE IS INSTALLED. EON EONOMIZE FIELD SPLIE EQUIP EQUIPMENT TEMINAL (MAKED) FS FLAME SENSO TEMINAL (UNMAKED) GND GOUND SPLIE (IF USED) HPS HIGH PESSUE SWITH SPLIE (MAKED) I IGNITO FATO WIING IG INTEGATED GAS UNIT ONTOLLE FIELD ONTOL WIING IFB INDOO FAN BOAD FIELD POWE WIING IDM INDUED DAFT MOTO AESSO O OPTIONAL IFM INDOO FAN MOTO WIING LGPS LOW GAS PESSUE SWITH (WHEN USED) LPS LOW PESSUE SWITH ONTATO LS PIMA LIMIT SWITH AP APAITO, OMP LS SEONDA LIMIT SWITH AP APAITO, INDUE MGV MAIN GAS VALVE H ANK ASE HEATE OFM OUTDOO FAN MOTO OMP OMPESSO MOTO PS PESSUE SWITH OMBUSTION ELA S OLLOUT SWITH DB DEFOST BOAD VS EVESING VALVE DFT DEFOST TEMPEATUE SAT SUPPL AI TEMPEATUE SWITH TAN TANSFOME DH DEHUMIDIFIATION MODE T-STAT THEMOSTAT D DEFOST BOAD ELA EON ELA EON ELA EONOMIZE PLUG SEE 50SD50065 EONOMIZE LABEL DIAGAM P P G B EON SAT G W IG L J IFO W G S S LS LS S S GV GV L 5AMP FUSE V V GV FS M BM L L T FIELD SUPPL V IDM AP B QT G/ SEE NOTE 6 LS O S G M B FS O I B G/ B W G EQUIP_GND LGPS (WHEN USED) LS O PS B MGV IF USED G DH W T-STAT O O SEE NOTE 7 H G G B G O W W OM B OMPESSO PLUG PIMA 08/0V DEFOST BOAD (DB) D TD OF B OF W 0 W P TAN SEONDA 4 V 4V B 0 G W AP B F B T T T 0 IFB DIP SWITH SETTINGS P G/ DEFAULT 90 MINUTES 0 MINUTES 60 MINUTES ON 0 MINUTES 0 60 SPEED UP P P D OF OF X 5 P T DFT T 4V P W / G 4 W O DB 4 /DH 5 6 P B SEE NOTE 5 SEE NOTE 0 DFT VS N G L B FUSE A OM B OM LOW HIGH GAS HEAT HPS OFM OMP SHEMATI 08/0--60 B B B B IFM LPS OLO ODE AK UE B BOWN G GA G GEEN O OANGE P PINK ED V VIOLET W WHITE ELLOW INDOO OWE 4V ONNETIONS SEE NOTE 4 SEE NOTE O W B 4 5 P SEE NOTE 4 B O EONOMIZE SEE NOTE 9 GOUNDED THU STANDOFF SEE NOTE 8 O O 90 FIELD SELETAE OPTIONS FO TIME PEIOD BETWEEN DEFOST LES (MINUTES) O QUIET SHIFT THE OMPESSO WILL SHUT OFF FO 0 SE. ON DEFOST INITIATION AND TEMINATION IN THE "QUIET SHIFT" ON POSITION. OFF (DEFAULT) SPEED JUMPEED TEST PINS (USE METAL OBJET) UP FIELD SPEED-UP LE ) MOMENTAIL SHOT PINS AND ELEASE TO BPASS OMPESSO OFF DELA. ) SHOT FO 5+ SE. AND ELEASE FO FOED DEFOST. ) PEMANENT SHOT WILL BE IGNOED. DEFOST WILL TEMINATE IN 0 SE. IF DFT OPEN. DEFOST WILL TEMINATE NOMALL IF DFT IS LOSED. Fig. 6 - Packaged Heat Pump and Dual Fuel Units onnection Wiring Diagram 0 - A0075 9

20 LADDE WIING DIAGAM DANGE: ELETIAL SHOK HAZAD DISONNET POWE BEFOE SEVIING OUTDOO FAN SETION OMPESSO SETION LPS HPS OMP T T T UNIT OMPONENT AANGEMENT INDOO FAN SETION AP F IFM OFM LS (LAGE) LS (SMALL) LS (SMALL ABINET) ONTOL BOX AEA IG PS GAS SETION FS DB IDM I TAN IFB AP MGV M S L USE OPPE ONDUTOS ONL FIELD SUPPL 08/0 VA, 60 HZ, PH OF DB D G/ H (IF USED) OFM OF S B B F AP T T T OMP G L L EONOMIZE IFM G/ IG L M IG V L IDM B G/ AP SEE NOTE 5 0 TAN PIMA 08/0V OM SEE NOTE 7 T'STAT O O IFB 4VA FUSE A P-"" P-5"X" P-"W" P-4"" P-"" G W IG 5AMP T FUSE P-"" B FS S S LS V LS S LS SEE NOTE 6 FS SEONDA 4V 4V DB V O W P- P- P-4 T P-7, P-8,O P-5, P-6,W T B P P HPS DFT B LPS B IFB OM IFB DB- G W DH G W B W P-4"G" P-6"W" P-5"/DH" P-"/" LS S S GV IFO W O G IF USED O PS M MGV P- O B VS SEE NOTE 0 B G/ DB- GV IG IG SEE NOTE G LOW HIGH GAS HEAT O SEE NOTE 4 W SEE NOTE 8 SEE NOTE 4 P O 4 5 IFM B IFB OM IFB P- EONOMIZE PLUG SEE 50SD50065 EONOMIZE LABEL DIAGAM B SAT SEE NOTE 9 48EZ50046 OM A Fig. 7 ont. - Packaged Heat Pump and Dual Fuel Units Ladder Wiring Diagram 0 - A0075L 0

21 EONOMIZE Fig. 7 - Packaged Air onditioner Units onnection Wiring Diagram 0 - A00

22 EONOMIZE Fig. 8 ont. - Packaged Air onditioner Units Ladder Wiring Diagram 0 - A00

23 EONOMIZE Fig. 8 - Packaged Air onditioner Units onnection Wiring Diagram A00

24 EONOMIZE Fig. 9 ont. - Packaged Air onditioner Units Ladder Wiring Diagram A00 4

25 NOTES:. IF AN OF THE OIGINAL WIES FUNISHED AE EPLAED, THE MUST BE EPLAED WITH THE SAME WIE O ITS EQUIVALENT.. SEE PIE PAGES FO THEMOSTATS.. USE 75 DEG. OPPE ONDUTOS FO FIELD INSTALLATION. 4. SEE INSTALLATION INSTUTIONS FO POPE HEATING AND OOLING ONNETIONS FO OU UNIT. INDOO FAN MOTO PLUGS - DO NOT DISONNET UNDE LOAD 5. THIS FUSE IS MANUFATUED B LITTEL- FUSE, 6. EMOVE P/N ELLOW SPLIE WHEN EONOMIZE AND EONOMIZE ELAS AE USED AND ONNET TO ELA AS SHOWN. 7. WHEN EONOMIZE AND EONOMIZE ELAS AE USED, ONNET THE ELLOW AND AK WIES TO ELA AS SHOWN. ELA KIT EQUED WITH EONOMIZE AND HEAT PUMP/DUAL FUEL UNITS. 8. WHEN EONOMIZE AND EONOMIZE ELAS AE USED, INSTALL WIES AS SHOWN ONTO THE OILS OF ELA AND ELA. 9.DEHUM FEATUE ANNOT BE USED WHEN EONOMIZE IS INSTALLED. UNIT FATO-SHIPPED IN STD MODE. AT AP H OMP DB DFT ONNETION WIING DIAGAM DANGE: ELETIAL SHOK HAZAD DISONNET POWE BEFOE SEVIING FIELD SPLIE TEMINAL (MAKED) TEMINAL (UNMAKED) SPLIE (IF EQ D) SPLIE (MAKED) FATO WIING FIELD ONTOL WIING FIELD POWE WIING AESSO O OPTIONAL WIING LEGEND AUTO TANSFOME 460V - 0V ONTATO APAITO, OMP ANK ASE HEATE OMPESSO MOTO DEFOST BOAD DEFOST TEMPEATUE SWITH EONOMIZE PLUG DH DEHUMIDIFIATION MODE DEHUM DEHUMIDIFIATION MODE D DEFOST ELA EON EONOMIZE EQUIP EQUIPMENT FU FUSE GND GOUND HPS HIGH PESSUE SWITH H HEATE ELA IFB INDOO FAN BOAD IFM INDOO FAN MOTO LPS LOW PESSUE SWITH OFM OUTDOO FAN MOTO OF OUTDOO FAN ELA VS EVESING VALVE TAN TANSFOME T-STAT THEMOSTAT EON ELA EON ELA STD STANDAD MODE FIELD L SUPPL L L EQUIP_GND K EL U IF USED FO WIING WITH ELETI HEATES SEE SHEMATI ON HEATE AESSO. H K GN K D K K OF OF K K EL AP F EL K OM BN EL PIMA 08/0V SEONDA 4 V G/ 0 4V OMPESSO PLUG K TAN ED G/ K EL BN EL BN K T EL T U T N G L BN K SHEMATI 08/0--60 OFM OMP IFM OLO ODE K AK U UE BN BOWN G GA GN GEEN ON OANGE PNK PINK ED ED VIO VIOLET WHT WHITE EL ELLOW 45 EONOMIZE SEE 50SD50065 EONOMIZE LABEL DIAGAM P P G EL ED BN K EON U SAT U AESSO ELETI HEAT WHT VIO H (5 KW) WHT H-4 (0 KW) VIO H H4 BN BN BN G DH W V O T-STAT G ED BN EL GN U WHT VIO ED P / G 4 /DH5 W 6 W 7 BN SEE NOTE 5 A 4VA FUSE OM OM OM LOW U K PNK ON ED SEE NOTE 4 PNK G BN PNK H & (0 KW) G H- (5 KW) BN H H BN BN ON BN ED EL WHT P W 4 IFB STD DEHUM HIGH K P4 UNIT OMPONENT AANGEMENT OUTDOO FAN SETION OMPESSO SETION LPS HPS OMP H S OFM EL SEE NOTE 7 K INDOO FAN ONTOL BOX AEA SETION SINGLE PT. ONNETION FO ELE TAN. AP HEA T IFB H F DB 4V SPLIE BOX K EL OOLING FAN LOGI 0 T T+90 G G ENEGIZED DE-ENEGIZED HEATING FAN LOGI 0 W 45 T T+45 B W B ENEGIZED DE-ENEGIZED DISONNET PE NE 4V POWE ENT SEE NOTE 6 O DEFAULT EL DIP SWITH SETTINGS MINUTES MINUTES MINUTES MINUTES ON O BN FIELD SELETAE OPTIONS FO TIME PEIOD BETWEEN DEFOST LES (MINUTES) O WHT ED ON DEFOST BOAD (DB) D TD OF OF 0 W P WHT PNK BN VIO G QUIET SHIFT OFF (DEFAULT) SPEED UP P P SPEED UP W T DFT T W W W O 4 5 U BN K PNK PNK U U SEE NOTE 9 Fig. 9 - Packaged Heat Pump Units onnection Wiring Diagram 0 - DFT VS K BN HPS K JUMPEED TEST PINS (USE METAL OBJET) FIELD SPEED-UP LE ) MOMENTAIL SHOT PINS AND ELEASE TO BPASS OMPESSO OFF DELA. ) SHOT FO 5+ SE. AND ELEASE FO FOED DEFOST. ) PEMANENT SHOT WILL BE IGNOED. DEFOST WILL TEMINATE IN 0 SE. IF DFT OPEN. DEFOST WILL TEMINATE NOMALL IF DFT IS LOSED. THE OMPESSO WILL SHUT OFF FO 0 SE. ON DEFOST INITIATION AND TEMINATION IN THE QUIET SHIFT ON POSITION U SEE NOTE 8 LPS U BN A000 5

26 EONOMIZE Fig. 0 ont. - Packaged Heat Pump Units Ladder Wiring Diagram 0 - A000 6

27 EONOMIZE Fig. 0 - Packaged Heat Pump Units onnection Wiring Diagram A099 7

28 EONOMIZE Fig. ont. - Packaged Heat Pump Units Ladder Wiring Diagram A099 8

29 Table8 O Sensor Standard Settings SETTING EQUIPMENT OUTPUT VENTILATION ATE (FM/ PESON) Proportional Any Interface w/standard Building ontrol System Proportional Any Exponential Any 4 Proportional 5 5 Economizer Proportional 0 6 Exponential 5 7 Exponential 0 8 Health & Safety Proportional Parking/Air Intakes/Loading Docks Proportional --- DEMAND ONTOL VENTILATION (DV) Below set (DV LED Off) Above set (DV LED On) ANALOG OUTPUT V mA --- 0V mA V mA V mA V mA V mA V mA V mA V mA O ONTOL ANGE (PPM) OPTIONAL ELA SETPOINT (PPM) ELA HSTEESIS (PPM) Table9 O Sensor Standard Settings Economizer Input/Output Logic INPUTS OUTPUTS ENTHALP OMPESSO NTEMINAL OUTDOO ETUN STAGE STAGE OUPIED UNOUPIED DAMPE On On On On High (Free ooling LED off) Low On Off On Off Minimum position losed Off Off Off Off On On On Off Modulating** (between min. Modulating** (between closed Low (Free ooling High On Off Off Off position and full --- open) and full --- open) LED on) Off Off Off Off Minimum position losed On On On On Modulating{{ (between High (Free ooling Modulating{{ (between closed Low On Off On Off min. position and DV LED off) and DV maximum) maximum) Off Off Off Off On On On Off Low (Free ooling LED on) High On Off Off Off Modulating*** Modulating{{{ Off Off Off Off EONOMIZE * For single enthalpy control, the module compares outdoor enthalpy to the ABD set point. {Power at N terminal determines Occupied/Unoccupied setting: 4 vac (Occupied), now power (Unoccupied). **Modulating is based on the supply---air sensor signal. {{Modulation is based on the DV signal. ***Modulation is based on the greater of DV and supply---air sensor signals, between minimum position and either maximum position (DV) or fully open (supply---air signal). {{{Modulating is based on the greater of DV and supply---air sensor signals, between closed and wither maximum position (DV) or fully open (supply---air signal). OPEATION Sequence of Operation When free cooling is not available, the compressor will be controlled by the thermostat. When free cooling is available, the outdoor-air damper is modulated by the Economizer control to provide a 50_ to 55_F (0_ to.8_) supply -air temperature into the zone. As the supply -air temperature fluctuates above 55_ (.8_) or below 50_F (0_), the dampers will be modulated (open or close) to bring the supply -air temperature back within the set points. For Economizer operation, there must be a thermostat call for the fan (G). This will move the damper to its minimum position during the occupied mode. NOTE: The DV Max potentiometer must be closed (W) when not using O sensor. Above 50_F (0_) supply -air temperature, the dampers will modulate from 00% open to the minimum open position. From 50_F to45_f (0_ to 7._) supply -air temperature, the dampers will maintain at the minimum open position. Below 45_F (7._), the dampers will be completely shut. As the supply -air temperature rises, the dampers will come back open to the minimum open position once the supply -air temperature rises to 48_F (8.9_). If power exhaust is installed, as the outdoor-air damper opens and closes, the power exhaust fans will be energized and deenergized. If field - installed accessory O sensors are connected to the Economizer control, a demand controlled ventilation strategy will begin to operate. As the O level in the zone increases above the O set point, the minimum position of the damper will be increased proportionally. As the O level decreases because of the increase in fresh air, the outdoor-air damper will be proportionally closed. Damper position will follow the higher demand condition from DV mode or free cooling mode. Damper movement from full closed to full open (or vice versa) will take between / and / minutes. If free cooling can be used as determined from the appropriate changeover command (dry bulb, enthalpy curve, or differential enthalpy), a call for cooling ( closes at the thermostat) will cause the control to modulate the dampers open to maintain the supply air temperature set point at 50_ to 55_F (0_ to.8_). As the supply air temperature drops below the set point range of 50_ to 55_F(0_ to.8_), the control will modulate the outdoor-air dampers closed to maintain the proper supply -air temperature. 9

30 EONOMIZE TOUESHOOTING See Table 9 for Economizer logic. An Economizer simulator program is available to help with Economizer training and troubleshooting. Economizer Preparation This procedure is used to prepare the Economizer for troubleshooting. No troubleshooting or testing is done by performing the following procedure. NOTE: This procedure requires a 9 -v battery,. kilo -ohm resistor, and a 5.6 kilo -ohm resistor which are not supplied with the Economizer.. Disconnect power at T and T. All LEDs should be off. Exhaust fan contacts should be open.. Disconnect device at P and P.. Jumper P to P. 4. Disconnect wires at T and T. Place 5.6 kilo -ohm resistor across T and T. 5. Jumper T to. 6. Jumper T to N. 7. If connected, remove sensor from terminals S o and +. onnect. kilo -ohm 4074EJM checkout resistor across terminals S o and Put 60 -ohm resistor across terminals S and Set minimum position, DV set point, and exhaust potentiometers fully W (counterclockwise). 0. Set DV maximum position potentiometer fully W (clockwise).. Set enthalpy potentiometer to D.. Apply power (4 vac) to terminals T and T. Differential Enthalpy To check differential enthalpy:. Make sure Economizer preparation procedure has been performed.. Place 60 -ohm resistor across S o and +.. Place. kilo -ohm resistor across S and +. The Free ool LED should be lit. 4. emove 60 -ohm resistor across S o and +. The Free ool LED should turn off. 5. eturn Economizer settings and wiring to normal after completing troubleshooting. Single Enthalpy To check single enthalpy:. Make sure Economizer preparation procedure has been performed.. Set the enthalpy potentiometer to A (fully W). The Free ool LED should be lit.. Set the enthalpy potentiometer to D (fully W). The Free ool LED should turn off. 4. eturn Economizer settings and wiring to normal after completing troubleshooting. DV (Demand ontrolled Ventilation) and Power Exhaust To check DV and Power Exhaust:. Make sure Economizer IV preparation procedure has been performed.. Ensure terminals AQ and AQ are open. The LED for both DV and Exhaust should be off. The actuator should be fully closed.. onnect a 9 -v battery to AQ (positive node) and AQ (negative node). The LED for both DV and Exhaust should turn on. The actuator should drive to between 90 and 95% open. 4. Turn the Exhaust potentiometer W until the Exhaust LED turns off. The LED should turn off when the potentiometer is approximately 90%. The actuator should remain in position. 5. Turn the DV set point potentiometer W until the DV LED turns off. The DV LED should turn off when the potentiometer is approximately 9 -v. The actuator should drive fully closed. 6. Turn the DV and Exhaust potentiometers W until the Exhaust LED turns on. The exhaust contacts will close 0 to 0 seconds after the Exhaust LED turns on. 7. eturn Economizer settings and wiring to normal after completing troubleshooting. DV Minimum and Maximum Position To check the DV minimum and maximum position:. Make sure Economizer preparation procedure has been performed.. onnect a 9 -v battery to AQ (positive node) and AQ (negative node). The DV LED should turn on. The actuator should drive to between 90 and 95% open.. Turn the DV maximum position potentiometer to midpoint. The actuator should drive to between 0 and 80% open. 4. Turn the DV maximum position potentiometer to fully W. The actuator should drive fully closed. 5. Turn the Minimum Position potentiometer to midpoint. The actuator should drive to between 0 and 80% open. 6. Turn the Minimum Position Potentiometer fully W. The actuator should drive fully open. 7. emove the jumper from T and N. The actuator should drive fully closed. 8. eturn Economizer settings and wiring to normal after completing troubleshooting. Supply -Air Input To check supply -air input:. Make sure Economizer preparation procedure has been performed.. Set the Enthalpy potentiometer to A. The Free ool LED turns on. The actuator should drive to between 0 and 80% open.. emove the 5.6 kilo -ohm resistor and jumper T to T. The actuator should drive fully open. 4. emove the jumper across T and T. The actuator should drive fully closed. 5. eturn Economizer settings and wiring to normal after completing troubleshooting. Economizer Troubleshooting ompletion This procedure is used to return the Economizer to operation. No troubleshooting or testing is done by performing the following procedure.. Disconnect power at T and T.. Set enthalpy potentiometer to previous setting.. Set DV maximum position potentiometer to previous setting. Set DV max potentiometer to fully closed (W) when not using a O sensor. 4. Set minimum position, DV set point, and exhaust potentiometers to previous settings. 5. emove 60 -ohm resistor from terminals S and emove. kilo -ohm checkout resistor from terminals SO and +. If used, reconnect sensor from terminals SO and emove jumper from T to N. 8. emove jumper from T to. 9. emove 5.6 kilo -ohm resistor from T and T. econnect wires at T and T. 0. emove jumper from P to P. econnect device at P and P.. Apply power (4 vac) to terminals T and T. 0