SPECIFICATION CATALOG GEOTHERMAL/WATER SOURCE INDOOR SPLIT HEAT PUMP 2 TO 6 TON SINGLE SPEED 2 TO 6 TON DUAL CAPACITY

Transcription

1 SPEIFIATION ATALOG GEOTHEMAL/WATE SOUE INDOO SPLIT HEAT PUMP 2 TO 6 TON SINGLE SPEED 2 TO 6 TON DUAL APAITY

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3 Table of ontents Introduction... 4 Model Nomenclature AHI Data Design Features... 8 Envision Indoor Split Features Physical Data... 9 Dimensional Data Model Nomenclature - Envision Air Handler Air Handler ompatibility...11 Model Nomenclature - Envision oil efrigerant oil ompatibility Physical Data - Envision Air Handler Line Set Sizes Electrical Data eference alculations Legend and Notes Operating Limits Operating Parameters Pressure Drop Performance Data Wiring Schematics Microprocessor ontrol Thermostat Wiring Engineering Guide Specifications....42

4 Envision Series splits are designed for indoor installations, and are connected to an indoor air handler via refrigerant lines and control wiring. Envision units utilize the ozone-safe -410A refrigerant to meet the most stringent EPA requirements now and for many years to come. Easily accessible controls and connections for refrigerant piping and water piping make this unit simple to install in a wide variety of applications. Heavy gauge metal cabinets are coated with durable polyester powder coat paint for long lasting beauty and protection. The Envision Series split will provide exceptional performance and comfort for many years. And because there is no outdoor blower like ordinary air conditioners or heat pumps, the Envision is whisper quiet. Envision Series units are performance-certified to AHI ISO standards, are ETL safety listed, and are ENEGYSTA qualified. As a leader in the industry, WaterFurnace is dedicated to innovation, quality and customer satisfaction. In fact, every unit built is exposed to a wide range of quality control procedures throughout the assembly process and is then subjected to a rigorous battery of computerized run tests to certify that it meets or exceeds performance standards for efficiency and safety, and will perform flawlessly at startup. As further affirmation of our quality standards, each unit carries our exclusive Quality Assurance emblem, signed by the final test technician. WaterFurnace International s corporate headquarters and manufacturing facility is located in Fort Wayne, IN. A scenic three-acre pond located in front of the building serves as our geothermal heating and cooling source to comfort-condition our 110,000 square feet of manufacturing and office space. As a pioneer, and now a leader in the industry, the team of WaterFurnace engineers, customer support staff and skilled assembly technicians is dedicated to providing the finest comfort systems available. By choosing or specifying WaterFurnace Envision Series products, you can be assured that your customer is investing in an exceptional comfort system and peace of mind for many years to come. All Envision Series product is safety listed under UL1995 thru ETL and performance listed with AHI in accordance with standard The Envision Series is also Energy Star rated. 4

5 Model Nomenclature N S Z A A 11 Model Type N = Envision ompressor Type D = Dual apacity S = Single Speed abinet onfiguration Z = Indoor Split Unit apacity Vintage A = urrent oax Options = opper N = upronickel Future Option A = Standard Hot Water Options 0 = No Hot Water Generation, No IntelliStart 1 = Hot Water Generation with factory installed pump, No IntelliStart 3 = No Hot Water Generation, IntelliStart 4 = Hot Water Generation with factory installed pump, IntelliStart Voltage 1 = /60/1 5

6 AHI Data AHI/ASHAE/ISO English (IP) Units Model apacity Modulation Flow ate gpm Water Loop Heat Pump Ground Water Heat Pump Ground Loop Heat Pump ooling Brine EWT 86 apacity Btu/h EE Btu/h/W H e a t i n g B r i n e EWT 68 apacity Btu/h OP ooling EWT 59 apacity Btu/h EE Btu/h/W Heating EWT 50 apacity Btu/h OP ooling Brine Full Load 77 Part Load 68 apacity Btu/h EE Btu/h/W H e at i n g B r i n e Full Load 32 Part Load 41 apacity OP Btu/h 026 Full , , , , , , Part , , , , , , Full , , , , , , Part , , , , , , Full , , , , , , Part , , , , , , Full , , , , , , Part , , , , , , Full , , , , , , Part , , , , , , Single , , , , , , Single , , , , , , Single , , , , , , Single , , , , , , Single , , , , , , Single , , , , , , Single , , , , , , ooling capacities based upon 80.6 DB, 66.2 WB entering air temperature 1/3/12 Heating capacities based upon 68 DB, 59 WB entering air temperature All ratings based upon operation at the lower voltage of dual voltage rated models. efer to the air handler compatibility table for matching air handler. Energy Star ompliance Table Model Ground Water Tier 2 Tier 3 Ground Loop Ground Water Ground Loop 026 Yes Yes Yes Yes 038 Yes Yes Yes Yes 049 Yes Yes Yes Yes 064 Yes Yes Yes Yes 072 Yes Yes No Yes 022 Yes Yes Yes Yes 030 Yes Yes Yes Yes 036 Yes Yes Yes Yes 042 Yes Yes Yes Yes 048 Yes Yes Yes Yes 060 Yes Yes Yes Yes 070 Yes No No No NOTE: This product meets Energy Star requirements when purchased with a minimum 5 year warranty and appropriate coil components are used. Ask your contractor for details. 1/3/12 Energy Star ating riteria In order for water-source heat pumps to be Energy Star rated they must meet or exceed the minimum efficiency requirements listed below. Please note there are 3 Tier levels that dictate minimum efficiency for water source pumps. Only one tier level is active at a given moment. Tier 2: 1/1/ /31/2011 EE OP losed loop water-to-air Open loop water-to-air losed loop water-to-water Open loop water-to-water Tier 3: 1/1/2012 No Effective End Date Published EE OP losed loop water-to-air Open loop water-to-air losed loop water-to-water Open loop water-to-water

7 AHI Data cont. The performance standard AHI/ASHAE/ISO became effective January 1, 2000 and replaces AI Standards 320, 325, and 330. This new standard has three major categories: Water Loop (comparable to AI 320), Ground Water (AI 325), and Ground Loop (AI 330). Although these standards are similar there are some differences: Unit of Measure: The ooling OP The cooling efficiency is measured in EE (US version measured in Btu/h per Watt. The Metric version is measured in a cooling OP (Watt per Watt) similar to the traditional OP measurement. Water onditions Differences Entering water temperatures have changed to reflect the centigrade temperature scale. For instance the water loop heating test is performed with 68 (20 ) water rounded down from the old 70 (21.1 ). Air onditions Differences Entering air temperatures have also changed (rounded down) to reflect the centigrade temperature scale. For instance the cooling tests are performed with 80.6 (27 ) dry bulb and 66.2 (19 ) wet bulb entering air instead of the traditional 80 (26.7 ) DB and 67 (19.4 ) WB entering air temperatures. 80.6/66.2 data may be converted to 80/67 using the entering air correction table. This represents a significantly lower relative humidity than the old 80/67 of 50% and will result in lower latent capacities. Pump orrection alculation Within each model, only one water flow rate is specified for all three groups and pumping Watts are calculated using the following formula. This additional power is added onto the existing power consumption. Pump power correction = (gpm x ) x (Press Drop x 2990) / 300 Where gpm is waterflow in gpm and Press Drop is the pressure drop through the unit heat exchanger at rated water flow in feet of head. Blower orrection alculation Blower power is corrected to zero external static pressure using the following equation. The nominal airflow is rated at a specific external static pressure. This effectively reduces the power consumption of the unit and increases cooling capacity but decreases heating capacity. These Watts are significant enough in most cases to increase EE and OPs fairly dramatically over AI 320, 325, and 330 ratings. Blower orrection = ( x 0.472) x (esp x 249) / 300 Where is airflow in and esp is the external static pressure at rated airflow in inches of water gauge. ISO apacity and Efficiency alculations The following equations illustrate cooling calculations: ISO ooling apacity = ooling apacity (Btu/h) + (Blower orrection (Watts) x 3.412) ISO EE Efficiency (W/W) = ISO ooling apacity (Btu/h) x / [ Input (Watts) - Blower orrection (Watts) + Pump orrection (Watt)] The following equations illustrate heating calculations: ISO Heating apacity = Heating apacity (Btu/h) - (Blower orrection (Watts) x 3.412) ISO OP Efficiency (W/W) = ISO Heating apacity (Btu/h) x / [ Input (Watts) - Blower orrection (Watts) + Pump orrection (Watt)] omparison of Test onditions AI 320 ISO/AHI WLHP AI 325 ISO/AHI GWHP AI 330 ISO/AHI GLHP ooling Entering Air - DB/WB 80/ / / / / /66.2 Entering Water / Fluid Flow ate * ** ** ** ** ** Heating Entering Air - DB/WB Entering Water / Fluid Flow ate * ** ** ** ** ** Note *: Flow rate is set by 10 rise in standard cooling test Note **: Flow rate is specified by the manufacturer Part load entering water conditions not shown. WLHP = Water Loop Heat Pump; GWHP = Ground Water Heat Pump; GLHP = Ground Loop Heat Pump onversions: (lps) = x 0.472; WaterFlow (lps) = GPM x ; ESP (Pascals) = ESP (in wg) x 249; Press Drop (Pascals) = Press Drop (ft hd) x

8 Design Features Application Flexibility Safe, efficient operation in a wide range of liquid temperatures (25 to 110) and flow rates (as low as 1.5 gpm/ton in open loop applications when EWT >50). Easily accessible loop pump wiring. Operating Efficiencies Environmentally friendly -410A refrigerant. LED fault and status lights with memory for easy diagnostics. Accumulator on all models for compressor reliability. AHI rating for heating OPs, cooling EEs and low water flow requirements. Optional hot water generator provides hot water at considerable savings while improving overall system efficiency. High-stability expansion valve delivers optimum refrigerant flow over a wide range of conditions. Efficient opeland scroll compressors in all units. Oversized coaxial tube water-to-refrigerant heat exchanger operates at low liquid pressure drops. onvoluted copper water tube functions efficiently at low flow rates, and provides freeze-damage resistance. Service Advantages Easily removable top, front and side access panels. Easily accessible thermal expansion valve. Brass, swivel-type water connections for ease of installation. High- and low-pressure service ports in refrigerant circuit. Swing-out control box providing easy access to all components. Heavy-gauge steel cabinets are painted with durable polyester powder coat paint for long lasting beauty and service. All refrigerant brazing is performed in a nitrogen atmosphere. All units are deep evacuated to less than 150 microns prior to refrigerant charging. All joints are helium leak-tested to ensure an annual leak rate of less than 1/4 ounce. efrigerant suction lines, hot water generator coil, and all water pipes are fully insulated to reduce condensation problems in low temperature operation. Noise reduction features: Double isolation mounted compressors, insulated cabinet using 1/2-inch coated glass fiber. ompressor sound blanket Discharge muffler on dual capacity units helps quiet the compressor gas pulsations. Safety features include high- and low-pressure refrigerant controls to protect the compressor. oaxial heat exchanger and optional hot water generator are ThermaShield coated. Options and Accessories Optional ThermaShield coated hot water generator with internally mounted pump and water heater plumbing connector Electronic auto-changeover thermostat with 3-stage heat/2-stage cool and indicator LEDs losed loop flow center and loop circulating kits Hose kits Additional accessory relay Mounting pad Well water kits IntelliStart compressor soft starter Factory Quality All units are manufactured on an automated testing assembly line. This assembly line features monitoring and assembly processes that lead the industry such as: - omponent verification through bar codes. - Multiple automatic leak and pressure tests. - Performance of a water-based run test measuring both functionality and performance of the unit. - Database management of all run test parameters for service analysis. - Integrated fail safe system that prevents packaging of a failed unit. 8

9 Envision Indoor Split Features Fully insulated cabinet with access panels Optional ThermaShield coated hot water generator with internal pump High efficiency compressor Swing-out access panel ThermaShield coated coaxial heat exchanger Optional hot water generator connections Accumulator Status and fault lights Brass service valves Microprocessor control efrigerant line connections Thermal expansion valve Brass swivel water connections Liquid line filter drier Physical Data Model ompressor (1 each) Single Speed Scroll Dual apacity Scroll Factory harge 410a, oz [kg] 56 [1.59] 56 [1.59] 56 [1.59] 74 [2.1] 90 [2.55] 92 [2.61] 108 [3.06] 52 [1.47] 56 [1.59] 90 [2.55] oax and Water Piping Water onnections Size - Swivel- in [mm] 1 [25.4] 1 [25.4] HWG onnection Size - Female Sweat (I.D.) - in [mm] 1/2 [12.7] 1/2 [12.7] Brass Service Valve - Liquid Line - in [mm] Brass Service Valve - Suction Line - in [mm] oax and Piping Water Volume - gal [l] Weight - Operating, lb [kg] Weight - Packaged, lb [kg] 0.7 [2.6] 164 [74] 184 [83] 3/8 [9.525] 5/8 [15.875] 1.0 [3.8] 174 [79] 194 [88] 1.3 [4.9] 212 [96] 232 [105] 1.3 [4.9] 213 [97] 233 [106] 3/4 [19.05] 1.6 [6.1] 246 [112] 266 [121] 1/2 [12.7] 7/8 [22.225] 1.6 [6.1] 251 [114] 271 [123] 2.3 [8.7] 292 [132] 312 [142] NOTES: All units have TXV expansion devices, and 1/2 in. [12.2 mm] and 3/4 in. [19.1 mm] electrical knockouts. Brass service valves are sweat type valves. 5/8 [15.875] 0.7 [2.6] 189 [186] 209 [95] 3/8 [9.525] 3/4 [19.05] 1.3 [4.9] 236 [107] 256 [116] 1.6 [6.1] 250 [113] 270 [122] 92 [2.61] 1.6 [6.1] 271 [123] 291 [132] 104 [2.95] 1/2 [12.7] 7/8 [22.225] 2.3 [8.7] 290 [132] 310 [141] 6/27/11 9

10 Dimensional Data B A M L K E F G H J D Model Height Width Depth Water In Water Out Service Valve Liquid HWG In Dimensions are in inches. Decorative molding and water connections extend 1.2 in. [30.5 mm] beyond the front of the cabinet. efrigerant line connections extend 2 in. [50.8 mm] beyond the front of the cabinet. Gas HWG Out Low Voltage External Pump A B D E F G H J K L M Line Voltage 10

11 Model Nomenclature - Envision Air Handler NAH 036 A Model Type Air oil NAH = Envision Series Air Handler = efrigerant H = Hydronic Unit apacity efrigerant Models Nom. FM Motor 022 MBTUH = EM /60/1 026 MBTUH MBTUH 980 Disconnect 036 MBTUH = No breaker installed 042 MBTUH 1425 (only on 5kW & 10kW heaters) 048 MBTUH = Breaker installed 060 MBTUH 1760 (only on 15kW & 20kW heaters) Hydronic Models 026 MBTUH MBTUH 1225 Electric Heat 048 MBTUH = No electric heat 060 MBTUH = 5 kw (available on only) 10 = 10 kw (available on only) Vintage 15 = 15 kw (available on only) A = urrent 20 = 20 kw (available on 060 only) NOTE: Kit NAHB must be ordered to field convert the NAH to bottomflow air discharge. Air Handler ompatibility Air Handler Sizing Selection The Envision Air Handlers are designed for -410A refrigerant and should be matched with Envision Split Series compressor section according to the table below. Air Handler Indoor Split Model (Single) Indoor Split Model (Dual apacity) Outdoor Split Model (Dual apacity) () Electric Heat (kw) NAH022A***1 NSZ NAH026A***1 - NDZ026 NDS NAH030A***1 NSZ , 10 NAH036A***1 NSZ , 10 NAH036A***1 - NDZ038 NDS , 10 NAH042A***1 NSZ , 15 NAH048A***1 NSZ , 15 NAH048A***1 - NDZ049 NDS , 15 NAH060A***1 NSZ , 15, 20 NAH060A***1 - NDZ064 NDS , 15, 20 NAH060A***1 NSZ , 15, 20 NAH060A***1 - NDZ072 NDS , 15, 20 6/9/08 11

12 Model Nomenclature - Envision oil N A Model Type N = Envision efrigerant oil NH = Envision Hydronic oil onfiguration A = "A" oil oil abinet = Encased U = Uncased apacity efrigerant Models 026 MBTUH 036 MBTUH 048 MBTUH 060 MBTUH Hydronic Models 060 MBTUH NOTE: All efrigerant oils include TXV. efrigerant oil ompatibility Encased/Uncased oil Indoor Split Model (Single) Indoor Split Model (Dual apacity) Outdoor Split Model (Dual apacity) ecommended () NA026* NSZ NA026* - NDZ026 NDS NA026* NSZ NA036* NSZ NA036* - NDZ038 NDS NA048* NSZ NA048* NSZ NA048* - NDZ049 NDS NA060* NSZ NA060* - NDZ064 NDS NA060* NSZ NA060* - NDZ072 NDS /14/08 12

13 Physical Data - Envision Air Handler Air Handler Model Number (efrigerant) NAH022 NAH026 NAH030 NAH036 NAH042 NAH048 NAH060 Air oil Total Face Area, ft2 [m2] Tube outside diameter - in. [mm] 5.83 [0.54] 3/8 [9.52] Evaporator Number of rows 2 3 oil Fins per inch 12 Suction line connection - in. [mm] sweat 5/8 [15.87] 7/8 [22.22] Liquid line connection - in. [mm] sweat 3/8 [9.52] efrigerant -410a Nominal cooling capacity - tons [kw] 1.8 [6.44] 2.1 [7.59] 2.5 [8.79] 3 [10.55] 3.5 [12.30] 4 [14.06] 5 [17.58] ondensate drain connection - (FPT) in. [mm] 3/4 [19.05] Blower Wheel Size (Dia x W), in. [mm] Blower motor type/speeds 11 x 10 [279 x 254] EM variable speed Blower motor output - hp [W] 1/2 [373] 1 [746] Filter Standard - 1" [51mm] MEV3 disposable, in. [mm] Electrical characteristics (60hz) 20 x 24 [508 x 635] 208/230-1ph Shipping weight - lbs. [kg] Operating weight - lbs. [kg] 215 [97.52] 195 [88.45] 220 [99.79] 200 [90.71] 1/11/08 13

14 Line Set Sizes Unit Size Air Handler 20 feet 40 feet 60 feet Factory harge Suction Liquid Suction Liquid Suction Liquid (oz.) NOTES: * The "harge Amount with NAH Air Handler" column is based on the charge amount for a NAH Air Handler+ompressor Section/Split. Additional charge will have to be added accordingly for line set length. After harge is added adjustments can be made to get appropriate subcooling and superheat. Additional charge for -410A is 0.50 oz. per ft. for 3/8 in. and 1.0 oz. per ft. for 1/2 in. tube. *harge Amount with NAH Air Handler (oz.) 022 NAH022 5/8 OD 3/8 OD 5/8 OD 3/8 OD 3/4 OD 3/8 OD NAH030 5/8 OD 3/8 OD 3/4 OD 3/8 OD 3/4 OD 3/8 OD NAH036 5/8 OD 3/8 OD 3/4 OD 3/8 OD 3/4 OD 1/2 OD NAH042 3/4 OD 3/8 OD 3/4 OD 3/8 OD 7/8 OD 1/2 OD NAH048 3/4 OD 3/8 OD 7/8 OD 3/8 OD 7/8 OD 1/2 OD NAH060 7/8 OD 1/2 OD 7/8 OD 1/2 OD 1-1/8 OD 1/2 OD NAH060 7/8 OD 1/2 OD 7/8 OD 1/2 OD 1-1/8 OD 1/2 OD NAH026 5/8 OD 3/8 OD 3/4 OD 3/8 OD 3/4 OD 1/2 OD NAH036 3/4 OD 3/8 OD 3/4 OD 3/8 OD 3/4 OD 1/2 OD NAH048 3/4 OD 3/8 OD 7/8 OD 3/8 OD 7/8 OD 1/2 OD NAH060 7/8 OD 1/2 OD 7/8 OD 1/2 OD 1-1/8 OD 1/2 OD NAH060 7/8 OD 1/2 OD 7/8 OD 1/2 OD 1-1/8 OD 1/2 OD /6/10 Electrical Data Model ated Voltage Voltage Min/Max ompressor M LA LA LA* /60/1 197/ /60/1 197/ /60/1 197/ /60/1 197/ /60/1 197/ /60/1 197/ /60/1 197/ /60/1 197/ /60/1 197/ /60/1 197/ /60/1 197/ /60/1 197/ ated voltage of /60/1 HA circuit breaker in USA only Min/Max Voltage of 197/253 All fuses lass K-5 * With optional IntelliStart HWA Pump FLA Ext Loop FLA Total Unit FLA Min irc Amp Max Fuse/ HA 5/6/09 14

15 eference alculations Heating alculations: HE LWT = EWT - gpm x 500 ooling alculations: H LWT = EWT + gpm x 500 LAT = EAT + H x 1.08 LAT(DB) = EAT(DB) - S x 1.08 TH = H + L = T - S S S/T = T Legend and Notes ABBEVIATIONS AND DEFINITIONS: = airflow, cubic feet/minute EWT = entering water temperature, Fahrenheit gpm = water flow in gallons/minute WPD = water pressure drop, PSI and feet of water EAT = entering air temperature, Fahrenheit (dry bulb/wet bulb) H = air heating capacity, MBtu/h T = total cooling capacity, MBtu/h S = sensible cooling capacity, MBtu/h kw = total power unit input, kilowatts H = total heat of rejection, MBtu/h HE = total heat of extraction, MBtu/h = hot water generator capacity, MBtu/h EE = Energy Efficient atio = Btu output/watt input OP = oefficient of Performance = Btu output/btu input LWT = leaving water temperature, LAT = leaving air temperature, TH = total heating capacity, MBtu/h L = latent cooling capacity, MBtu/h S/T = sensible to total cooling ratio Hot water generator capacity based on 0.4 gpm flow per nominal unit ton at 90 entering hot water temperature. Performance Data tables do not include water pumping watts and are based upon 15% (by volume) methanol antifreeze solution. Multiple Flow ates (for EWT) are shown in the Performance Data tables. The lowest flow rate shown is used for geothermal open loop/well water systems with a minimum 50 F. The second flow rate shown is the minimum geothermal closed loop flow rate. The third flow rate shown is optimum for geothermal closed loop and the suggested flow rate for boiler tower applications. Interpolation between EWT, gpm and data is permissible. Extrapolation for heating data down to 25 is permissible. atalog illustrations cover the general appearance of products at time of publication. We reserve the right to make changes in design and construction at any time without notice. 15

16 Operating Limits Operating Limits ooling Heating () ( ) () ( ) Air Limits Min. Ambient Air ated Ambient Air Max. Ambient Air Min. Entering Air ated Entering Air db/wb 80.6/ / Max. Entering Air db/wb 110/83 43/ Water Limits Min. Entering Water Normal Entering Water Max. Entering Water NOTE: Minimum/maximum limits are only for start-up conditions, and are meant for bringing the space up to occupancy temperature. Units are not designed to operate at the minimum/maximum conditions on a regular basis. The operating limits are dependant upon three primary factors: 1) water temperature, 2) return air temperature, and 3) ambient temperature. When any of the factors are at the minimum or maximum levels, the other two factors must be at the normal level for proper and reliable unit operation. Operating Parameters Single Speed Models - NSZ022 thru NSZ070 (with NAH Series Air Handler) Entering Water Temp Water Flow gpm/ton ooling -- No Hot Water Generator NSZ022 thru NSZ060 NSZ070 NSZ022 thru NSZ070 Suction Pressure PSIG Discharge Pressure PSIG Suction Pressure PSIG Discharge Pressure PSIG Superheat Subcooling Water Temp ise Air Temp Drop DB Entering Water Temp Water Flow gpm/ton Heating -- No Hot Water Generator NSZ022 thru NSZ060 NSZ070 NSZ022 thru NSZ070 Suction Pressure PSIG Discharge Pressure PSIG Suction Pressure PSIG Discharge Pressure PSIG Superheat Subcooling Water Temp Drop Air Temp ise DB NOTES: ooling performance based on entering air temperatures of 80 DB, 67 WB. Heating performance based on entering air temperatures of 70 DB. 5/29/08 16

17 Operating Parameters NDZ026 thru NDZ072 (with NAH Series Air Handler) First Stage Operation Entering Water Temp Water Flow gpm/ton ooling -- No Hot Water Generator NDZ026 thru NDZ064 NDZ072 NDZ026 thru NDZ072 Suction Pressure PSIG Discharge Pressure PSIG Suction Pressure PSIG Discharge Pressure PSIG Superheat Subcooling Water Temp ise Air Temp Drop DB Entering Water Temp Water Flow gpm/ton Heating -- No Hot Water Generator NDZ026 thru NDZ064 NDZ072 NDZ026 thru NDZ072 Suction Pressure PSIG Discharge Pressure PSIG Suction Pressure PSIG Discharge Pressure PSIG Superheat Subcooling Water Temp Drop Air Temp ise DB Second Stage Operation Entering Water Temp Water Flow gpm/ton ooling -- No Hot Water Generator NDZ026 thru NDZ064 NDZ072 NDZ026 thru NDZ072 Suction Pressure PSIG Discharge Pressure PSIG Suction Pressure PSIG Discharge Pressure PSIG Superheat Subcooling Water Temp ise Air Temp Drop DB Entering Water Temp Water Flow gpm/ton Heating -- No Hot Water Generator NDZ026 thru NDZ064 NDZ072 NDZ026 thru NDZ072 Suction Pressure PSIG Discharge Pressure PSIG Suction Pressure PSIG Discharge Pressure PSIG Superheat Subcooling Water Temp Drop Air Temp ise DB NOTES: ooling performance based on entering air temperatures of 80 DB, 67 WB. Heating performance based on entering air temperatures of 70 DB. 5/29/08 17

18 Pressure Drop Single Speed Dual apacity Model GPM Pressure Drop (psi) Model GPM Pressure Drop (psi) full load part load full load part load full load part load full load /30/ part load full load part load /30/06 18

19 NSZ022 - Performance Data 700 ated EWT Flow gpm PSI WPD HEATING - EAT 70 OOLING - EAT 80/67 FT H LAT kw HE OP T S S/T atio kw H EE

20 NSZ030 - Performance Data 900 ated EWT Flow gpm PSI WPD HEATING - EAT 70 OOLING - EAT 80/67 FT H LAT kw HE OP T S S/T atio kw H EE

21 NSZ036 - Performance Data 1250 ated EWT Flow gpm PSI WPD HEATING - EAT 70 OOLING - EAT 80/67 FT H LAT kw HE OP T S S/T atio kw H EE

22 NSZ042 - Performance Data 1350 ated EWT Flow gpm PSI WPD HEATING - EAT 70 OOLING - EAT 80/67 FT H LAT kw HE OP T S S/T atio kw H EE

23 NSZ048 - Performance Data 1500 ated EWT Flow gpm PSI WPD HEATING - EAT 70 OOLING - EAT 80/67 FT H LAT kw HE OP T S S/T atio kw H EE

24 NSZ060 - Performance Data 2000 ated EWT Flow gpm PSI WPD HEATING - EAT 70 OOLING - EAT 80/67 FT H LAT kw HE OP T S S/T atio kw H EE

25 NSZ070 - Performance Data 2200 ated EWT Flow gpm PSI WPD HEATING - EAT 70 OOLING - EAT 80/67 FT H LAT kw HE OP T S S/T atio kw H EE

26 NDZ026 High Speed - Performance Data 900 ated EWT Flow gpm PSI WPD HEATING - EAT 70 OOLING - EAT 80/67 FT H LAT kw HE OP T S S/T atio kw H EE

27 NDZ026 Low Speed - Performance Data 700 ated EWT Flow gpm PSI WPD HEATING - EAT 70 OOLING - EAT 80/67 FT H LAT kw HE OP T S S/T atio kw H EE

28 NDZ038 High Speed - Performance Data 1250 ated EWT Flow gpm PSI WPD HEATING - EAT 70 OOLING - EAT 80/67 FT H LAT kw HE OP T S S/T atio kw H EE

29 NDZ038 Low Speed - Performance Data 1050 ated EWT Flow gpm PSI WPD HEATING - EAT 70 OOLING - EAT 80/67 FT H LAT kw HE OP T S S/T atio kw H EE

30 NDZ049 High Speed - Performance Data 1550 ated EWT Flow gpm PSI WPD HEATING - EAT 70 OOLING - EAT 80/67 FT H LAT kw HE OP T S S/T atio kw H EE

31 NDZ049 Low Speed - Performance Data 1350 ated EWT Flow gpm PSI WPD HEATING - EAT 70 OOLING - EAT 80/67 FT H LAT kw HE OP T S S/T atio kw H EE

32 NDZ064 High Speed - Performance Data 1800 ated EWT Flow gpm PSI WPD HEATING - EAT 70 OOLING - EAT 80/67 FT H LAT kw HE OP T S S/T atio kw H EE

33 NDZ064 Low Speed - Performance Data 1500 ated EWT Flow gpm PSI WPD HEATING - EAT 70 OOLING - EAT 80/67 FT H LAT kw HE OP T S S/T atio kw H EE

34 NDZ072 High Speed - Performance Data 2200 ated EWT Flow gpm PSI WPD HEATING - EAT 70 OOLING - EAT 80/67 FT H LAT kw HE OP T S S/T atio kw H EE

35 NDZ072 Low Speed - Performance Data 1700 ated EWT Flow gpm PSI WPD HEATING - EAT 70 OOLING - EAT 80/67 FT H LAT kw HE OP T S S/T atio kw H EE

36 Wiring Schematics Dual apacity Split Wiring Schematic /60/1 Ext Pump 1/2 hp Total /60/1 Pump G Pump PB Unit /60/1 G un apacitor Blue ed S omfort Alert Tan (16) L 2 L 1 Black D SOL + - S Duel Fuel Wiring Diagram Using Field Installed elay Notes: 1-24V Accessory relay (see SW2-3 for description of operation) 2 - This Switch allows the unit to down stage with the t-stat when OFF and finish on second stage when ON. Finish second stage reduces stage changing in recip dual capacity compressors and should be ON for unzoned Dual ap E-Series or Premier 2 speed units. 3 - omfort Alert fault output to Premier ontrol Board 4 - SW2-8 must be in the OFF position for pulsed L lockout signal and in the ON position for constant L lockout signal. 5 - DHW pump only in models with hot water generation option. 6 - onnection of remote unit that does not have a loop pump for slave operation. Thermostat Y1 1st Stage ompressor EZ Split Y1 Blu Y2 2 nd Stage ompressor Y2 3A Fuse Blu(17) DHW Pump Pink NOTE 5 Pink(13) Yel(8) Gry(9) Org (14) Brn(15) Fossil Fuel Furnace o mmo n 24 VA O L eversing Valve Fault Signal ommon 24 VA O P1 L O NO Fused L2 NO Fused L2 NO 240V L2 N NO N 240V L2 F1-10A 240V 240V L1 F1-10A 240V W G Auxiliary Heat elay F an Auxiliary Heat elay G W Auxiliary Heat elay Sh u t Do wn P2 omfort Alert Status LED PB Blk(1 ) NOTE 6 SL1 In Violet(3) Violet(2) SL1 Out Optional emote Unit Without Loop Pump SW4 Y2 Y G Y 1 Yel(6) Blk(5) Wht(4) HI -GND P1 Y1 Y2 W O G LO P2 Shut Down SL1 In SL1 Out Not Used NOTE 1 P3 Acc om 1 Acc N 2 Acc NO LED Drain Water Flow High Press Low Press / A Air Flow Status DHW Limit DHW off P4 OM *Green LED not flashing 2 EM2 Air Flow Settings OM 3 OM 4 Premier 2 Microprocessor Logic ontrol (D Voltage) SW1 On SW2 On SW3 On Test / Norm 2 Loop / Well 3 Fan / omp 4 Dehum / Norm 5 No Htg3 / Htg3 6 Inputs / Norm 7 Outputs / Norm 8 Pulse L / onstant L (NOTE 4) 1 2 Speed / 1 Speed 2 Normal / Finish on 2 nd (Note 2) 3 No PM / PM 4 Electric Heat / Normal 5 Envision / E Series or Premier Normal Display Mode Field Selection Dips - #1 On, #6 On, #7 On Drain pan overflow Lockout WL thermistor (loop<15,well<30) Lockout High Pressure Low Pressure / omfort Alert EM2 PM < 100 rpm Lockout Microprocessor malfunction* HWL thermistor > 130 DHW pump switch off urrent Fault Status #1 Off, #6 On, #7 On Drain pan overflow WL thermistor (loop<15, well < 30) High Pressure Low Pressure / omfort Alert EM2 PM < 100 rpm Not Used HWL thermistor > 130 DHW pump switch off Main Logic PB OM Diagnostic Modes Inputs #6 Off, #7 On Y1 Y2 O G W SL1 SL2 -- Outputs #6 On, #7 Off ompressor Lo ompressor Hi V FAN DHW Pump Loop Pump 1 Loop Pump 2 -- Outputs 2 #6 Off, #7 Off Blower Lo Blower Med Blower Hi Aux Heat #1 Aux Heat #2 AuxHeat #3 Aux Heat #4 -- P NOT USED Note : Field installed DPST dual fuel relay ( equired for dual fuel installation ) P5 NOTE 3 11 Tan L omfort Alert 4 9 Orange V 2 Orange 10 Not Used 3 Not Used 8 1 Pink Pink T HWL 12 Yellow T FD 5 Yellow 13 Blue LP 6 Blue 7 Black HP 14 Black omfort Alert Status LED Flash ode Description Solid Module Has Green ed Solid Y1 Present But ompressor Not unning ode 1 Long un Time ode 2 System Pressure Trip ode 3 Short ycling ode 4 Locked otor Yellow ode 5 Open ircuit ode 6 Open Start ircuit ode 7 Open un ircuit ode 8 Welded ontactor ode 9 Low Voltage P 2 T G 3 L1 Legend 1 = chassis Factory Low voltage wiring Factory Line voltage wiring Field low voltage wiring Field line voltage wiring Optional block D Voltage PB traces Internal junction Quick connect terminal Wire nut Field wire lug Ground elay ontacts - N.O., N.. Fuse Thermistor Light emitting diode - Green elay coil apacitor w/ bleed resistor Switch - ondensate overflow Switch - High pressure Switch - Low pressure Switch -Hot Water On /Off Polarized connector A - omfort Alert - ompressor ontactor O - ondensate overflow sensor 1 - DHW pump relay 2 - Loop pump relay 3 - PS Fan Speed elay 4 - PS Fan elay S - ompressor Solenoid **D oil** F1 and F2 - Fuses HE - Heater element HP - High pressure switch E 1 to E4 - Aux heat stage relays LP - Low pressure switch PB1, PB2 - blocks PS - strip V - eversing Valve coil SW1 - DIP package 12 position SW2 - DIP package 8 position SW3 - DIP package 5 position SW4 - Hot water pump enable switch TS - Thermal limit switch HWL - Hot water limit sensor S - Start ontactor S - Start elay WL - Water oil Limit Sensor 97P /8/08 36

37 Wiring Schematics cont. Single Speed Split Wiring Schematic /60/1 Ext Pump 1/2 hp Total /60/1 Pump G Pump PB Unit /60/1 G un apacitor Blue L2 ed S omfort Alert Tan (16) L1 Black Notes: 1-24V Accessory relay (see SW2-3 for description of operation) 2 - This Switch allows the unit to down stage with the t-stat when OFF and finish on second stage when ON. Finish second stage reduces stage changing in recip dual capacity compressors and should be ON for unzoned Dual ap E-Series or Premier 2 speed units. 3 - omfort Alert fault output to Premier ontrol Board 4 - SW2-8 must be in the OFF position for pulsed L lockout signal and in the ON position for constant L lockout signal. 5 - DHW pump only in models with hot water generation option. 6 - onnection of remote unit that does not have a loop pump for slave operation. Duel Fuel Wiring Diagram Using Field Installed elay Thermostat Y1 1st Stage ompressor EZ Split Y1 Blu Y2 2 nd Stage ompressor Y2 3A Fuse Blu(17) DHW Pump Pink NOTE 5 Pink(13) Yel(8) Gry(9) Org(14) Brn(15) Fossil Fuel Furnace o mmo n 24 VA O L eversing Valve Fault Signal ommon 24 VA O P1 L O NO Fused L2 NO Fused L2 NO 240V L2 N NO N 240V L2 F1-10A 240V 240V L1 F1-10A 240V W G Auxiliary Heat elay F an Auxiliary Heat elay G W Auxiliary Heat elay Shut Down P2 omfort Alert Status LED PB Blk(1 ) NOTE 6 SL1 In Violet(3) Violet(2) SL1 Out Optional emote Unit Without Loop Pump SW4 Y G Y Yel(6) Blk(5) -GND P1 Y1 Y2 W O G LO 1 HI P2 Shut Down SL1 In SL1 Out Not Used NOTE 1 P3 Acc om 1 Acc N 2 Acc NO LED Drain Water Flow High Press Low Press / A Air Flow Status DHW Limit DHW off P4 OM *Green LED not flashing 2 EM2 Air Flow Settings OM 3 OM 4 Premier 2 Microprocessor Logic ontrol (D Voltage) SW1 On SW2 On SW3 On Test / Norm 2 Loop / Well 3 Fan / omp 4 Dehum / Norm 5 No Htg3 / Htg3 6 Inputs / Norm 7 Outputs / Norm 8 Pulse L / onstant L (NOTE 4) 1 2 Speed / 1 Speed 2 Normal / Finish on 2 nd (Note 2) 3 No PM / PM 4 Electric Heat / Normal 5 Envision / E Series or Premier Normal Display Mode Field Selection Dips - #1 On, #6 On, #7 On Drain pan overflow Lockout WL thermistor (loop<15, well<30) Lockout High Pressure Low Pressure / omfort Alert EM2 PM < 100 rpm Lockout Microprocessor malfunction* HWL thermistor > 130 DHW pump switch off Main Logic PB urrent Fault Status #1 Off, #6 On, #7 On Drain pan overflow WL thermistor (loop<15, well<30) High Pressure Low Pressure / omfort Alert EM2 PM < 100 rpm Not Used HWL thermistor > 130 DHW pump switch off OM Diagnostic Modes Inputs #6 Off, #7 On Y1 Y2 O G W SL1 SL2 -- Outputs #6 On, #7 Off ompressor Lo ompressor Hi V FAN DHW Pump Loop Pump 1 Loop Pump 2 -- Outputs2 #6 Off, #7 Off Blower Lo Blower Med Blower Hi Aux Heat #1 Aux Heat #2 AuxHeat #3 Aux Heat #4 -- P NOT USED Note : Field installed DPST dual fuel relay ( equired for dual fuel installation ) P5 NOTE 3 11 Tan L omfort Alert 4 9 Orange V 2 Orange 10 Not Used 3 Not Used 8 1 Pink Pink T HWL 12 Yellow T FD 5 Yellow 13 Blue LP 6 Blue 7 Black HP 14 Black omfort Alert Status LED Flash ode Description Solid Module Has Green ed Solid Y1 Present But ompressor Not unning ode 1 Long un Time ode 2 System Pressure Trip ode 3 Short ycling ode 4 Locked otor Yellow ode 5 Open ircuit ode 6 Open Start ircuit ode 7 Open un ircuit ode 8 Welded ontactor ode 9 Low Voltage P 2 T G 3 L1 Legend 1 = chassis Factory Low voltage wiring Factory Line voltage wiring Field low voltage wiring Field line voltage wiring Optional block D Voltage PB traces Internal junction Quick connect terminal Wire nut Field wire lug Ground elay ontacts - N.O., N.. Fuse Thermistor Light emitting diode - Green elay coil apacitor w/ bleed resistor Switch - ondensate overflow Switch - High pressure Switch - Low pressure Switch -Hot Water On/Off Polarized connector A - omfort Alert - ompressor ontactor O - ondensate overflow sensor 1 - DHW pump relay 2- Loop pump relay 3 - PS Fan Speed elay 4 - PS Fan elay S - ompressor Solenoid **D oil** F1 and F2 - Fuses HE - Heater element HP - High pressure switch E 1 to E4 - Aux heat stage relays LP - Low pressure switch PB1, PB2 - blocks PS - strip V - eversing Valve coil SW1 - DIP package 12 position SW2 - DIP package 8 position SW3 - DIP package 5 position SW4 - Hot water pump enable switch TS - Thermal limit switch HWL - Hot water limit sensor S - Start ontactor S - Start elay WL - Water oil Limit Sensor 97P /8/08 37

38 Microprocessor ontrol Startup The unit will not operate until all the inputs and safety controls are checked for normal conditions. At first powerup, a four-minute delay is employed before the compressor is energized. omponent Sequencing Delays omponents are sequenced and delayed for optimum space conditioning performance. Accessory elay An accessory relay on the control board allows for field connection of solenoid valves, electronic air cleaners, etc. The accessory relay has a normally open output and a normally closed output. Short ycle Protection The control employs a minimum "off" time of four minutes to provide for short cycle protection of the compressor. Shutdown Mode A 24VA common signal to the shutdown input on the control board puts the unit into shutdown mode. ompressor, hot water pump and blower operation are suspended. Safety ontrols The Envision control receives separate signals for a high pressure switch for safety, a low pressure switch to prevent loss of charge damage, and a low suction temperature thermistor for freeze detection. Upon a continuous 30-second measurement of the fault (immediate for high pressure), compressor operation is suspended, the appropriate lockout LED begins flashing. (efer to the "Fault etry" section below.) Testing The Envision control allows service personnel to shorten most timing delays for faster diagnostics. (efer to the Field Selection DIP switch SW2-1.) Fault etry All faults are retried twice before finally locking the unit out. An output signal is made available for a fault LED at the thermostat. The fault retry feature is designed to prevent nuisance service calls. Diagnostics The Envision control board allows all inputs and outputs to be displayed on the LEDs for fast and simple control board diagnosis. (efer to the Field Selection DIP Switch SW2-1.) Hot Water High Limit (Hot Water Generator Option) This mode occurs when the hot water input temperature is at or above 130 for 30 continuous seconds. The HWG limit status LED on the unit illuminates and the hot water pump de-energizes. Hot water pump operations resume on the next compressor cycle or after 15 minutes of continuous compressor operation during the current thermostat demand cycle. Hot Water Justification Since compressor hot gas temperature is dependant on loop temperature in cooling mode, loop temperatures may be too low to allow proper heating of water. The control will monitor water and refrigerant temperatures to determine if conditions are satisfactory for heating water. The HWG limit status LED on the unit illuminates when conditions are not favorable for heating water. Heating Operation NOTE: The compressor section is operated by the Envision control. The blower motor and electric heat are operated by the controls located in the air handler. Heat, 1st Stage (Y1) The blower motor is started immediately, the loop pump is energized 5 seconds after the Y1 input is received, and the compressor is energized on low capacity 10 seconds after the Y1 input. The hot water pump is cycled 30 seconds after the Y1 input. Heat, 2nd Stage (Y1, Y2) Single-Speed Units The hot water pump is de-energized, which directs all heat to satisfying the thermostat, and the blower changes to high speed 15 seconds after the Y2 input (EM only). Heat, 2nd Stage (Y1, Y2) Dual apacity Units The second stage compressor will be activated 5 seconds after receiving a Y2 input as long as the minimum first stage compressor run time of 1 minute has expired. The EM blower changes from medium to high speed 15 seconds after the Y2 input. The omfort Alert will delay the second stage compressor until 5 seconds after it receives a Y2 from the board. Heat, 3rd Stage (Y1, Y2, W) Single-Speed Units The first stage of resistance heat is energized 10 seconds after W input, and with continuous 3rd stage demand, the additional stages of resistance heat engage 90 seconds after the first stage. 38

39 Microprocessor ontrol cont. Heat, 3rd Stage (Y1, Y2, W) Dual apacity Units The hot water pump is de-energized which directs all heat to satisfy the thermostat. The 1st stage of resistance heat is energized 10 seconds after W input, and with continuous 3rd stage demand, the additional stages of resistance heat engage 90 seconds after the first stage. Emergency Heat (W only) The blower is started on high speed, and the first stage of resistance heat is energized 10 seconds after the "W" input. ontinuing demand will engage the additional stages of resistance heat 90 seconds after the first stage. ooling Operation NOTE: The compressor section is operated by the Envision control. The blower motor is operated by the controls located in the air handler. In all cooling operations, the reversing valve directly tracks the O input. Thus, anytime the O input is present, the reversing valve will be energized. ool, 1st Stage (Y1, O) NOTE: The compressor section is operated by the Envision control. The blower motor and electric heat are operated by the controls located in the air handler. The blower motor and hot water pump are started immediately, the loop pump(s) is energized 5 seconds after the Y1 input is received. The compressor will be energized (on low capacity for Dual apacity units) 10 seconds after the Y1 input. The EM blower will operate at 85% of medium speed if in dehumidification mode. ool, 2nd Stage (Y1, Y2, O) Single Speed Units The blower changes to high speed (85% of high speed if in dehumidification mode) 15 seconds after the Y2 input (EM only). ool, 2nd Stage (Y1, Y2, O) Dual apacity Units The second stage compressor will be activated 5 seconds after receiving a Y2 input as long as the minimum first stage compressor run time of 1 minute has expired. The EM blower changes to high speed 15 seconds after the Y2 input (85% of high speed if in dehumidification mode). The omfort Alert will delay the second stage compressor until 5 seconds after it receives a Y2 from the board. Blower (G only) The blower motor is controlled by the air handler. Lockout onditions During lockout mode, the appropriate unit and thermostat lockout LEDs will illuminate. The compressor, loop pump, hot water pump, and accessory outputs are de-energized. The blower will continue to run on low speed. If the thermostat calls for heating, emergency heat operation will occur. omfort Alert lockouts cannot be reset at the thermostat. All other lockout modes can be reset at the thermostat after turning the unit off, then on, which restores normal operation but keeps the unit lockout LED illuminated. Interruption of power to the unit will reset a lockout without a waiting period and clear all lockout LEDs. High Pressure This lockout mode occurs when the normally closed safety switch is opened momentarily (set at 600 PSI). Low Pressure This lockout mode occurs when the normally closed low pressure switch is opened for 30 continuous seconds (set at 40 PSI). A low pressure fault may also be indicated when a omfort Alert lockout has occurred. Low Water oil Temperature Limit This lockout mode occurs when the thermistor temperature is at or below the selected point (well 30 or loop 15) for 30 continuous seconds. IntelliStart Some models shall be equipped with an optional IntelliStart. IntelliStart is a single phase soft starter which reduces the normal start current (LA) by 60%. This allows the heat pump to more easily go off grid. Using IntelliStart will also provide a substantial reduction in light flicker, reduce startup noise, and improve the compressor s start behavior. The IntelliStart is self-calibrating and may take several starts to optimize the compressor s starting characteristics. Features: Automatic adjustment of the compressor starting current to the available supply voltage maintaining constant starting torque and current. Supply line impedance monitoring and compensation. Automatic compensation for residual backpressure in the system. Monitoring of supply voltage while compressor is running to prevent motor stalling, causing excessive currents, under low voltage conditions. Light flicker reductions of up to 10:1 over LA under the same conditions. 39

40 Microprocessor ontrol cont. ompressor Monitoring/omfort Alert The omfort Alert displays abnormal compressor conditions through a unique flash code and communicates the conditions to the heat pump microprocessor control. The heat pump microprocessor will determine which fault to act on and ignore. Fault codes 2 (system pressure), 4 (locked rotor), 6 (open start circuit), and 7 (open run circuit) will result in a lockout. All other fault codes are passive. All compressor alerts are displayed on the module by flashing the yellow Alert LED a specific number of times consecutively followed by a pause, and then repeated. The number of consecutive flashes or Flash ode correlates to a specific abnormal condition. The red TIP LED means there is a thermostat demand signal Y present but the compressor is not running. The green POWE LED means the module has power. Green "POWE" LED - module has power ed "TIP" LED - Thermostat "Y" demand signal is present, but the compressor is not running. omfort Alert Flash odes Yellow "ALET" LED LED Description ause Flash ode 1 Long un Time Not applicable Flash ode 2 System Pressure Trip Not applicable Flash ode 3 Short ycling ompressor run time of less than 3 minutes on 4 consecutive cycles Flash ode 4 Locked otor Four consecutive compressor protector trips indicating compressor won't start Flash ode 5 Open ircuit "Y" thermostat demand signal with no compressor current Flash ode 6 Open Start ircuit "Y" thermostat demand signal with no current in the start circuit Flash ode 7 Open un ircuit "Y" thermostat demand signal with no current in the run circuit Flash ode 8 Welded ontactor urrent detected with no "Y" thermostat demand signal present Flash ode 9 Low Voltage Less than 17 VA detected in control circuit * Flash code number corresponds to a number of LED flashes, followed by a pause and then repeated. * TIP and ALET LEDs flashing at the same time indicates control circuit voltage is too low for operation. * eset ALET flash code by removing 24 VA power from module. * Last ALET flash code is displayed for 1 minute after module is powered on. esetting omfort Alert odes Alert codes can be reset manually by cycling power off and on to the omfort Alert module. Alert codes will reset automatically if conditions return to normal. Flash ode Number LED Description Automatic eset of Alert odes Flash ode 1 Long un Time Not applicable Flash ode 2 System Pressure Trip Not applicable Flash ode 3 Short ycling Four "alert free" on and off cycles to reset automatically Flash ode 4 Locked otor Four "alert free" on and off cycles to reset automatically Flash ode 5 Open ircuit One "alert free" on and off cycles to reset automatically Flash ode 6 Open Start ircuit One "alert free" on and off cycles to reset automatically Flash ode 7 Open un ircuit One "alert free" on and off cycles to reset automatically Flash ode 8 Welded ontactor One "alert free" on and off cycles to reset automatically Flash ode 9 Low Voltage esets when voltage rises above 19 VA * eset ALET flash code by removing 24 VA power from module. 40