INSTALLATION INSTRUCTIONS. ' Uili(Jl!YSma11l!P, ', AHRI Sllln<!ll!tl210lZ<ID, : shock, property damage, personal injury or death.

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3 Heating & Air Conditioning NSTALLATON NSTRUCTONS PACKAGE HEAT PUMP & AR CONDTONNG FEATURNG R-41A 13 SEER SERES (2-STons) mrecognze THS SYMBOL AS AN NDCATON OF MPORTANT SAFETY NFORMATON!A warnng These instrutions are intended as an aid to qualified liensed servie personnel for proper installation, adjustment and operation of this unit. Read these instrutions thoroughly before attempting installation l - =r ':" -=:v "'[ %. or operation. Failure to follow these instrutions may,lul4!91 HrntffE m"':: result in improper installation, adjustment, servie or maintenane possibly resulting in fire, eletrial ' Uili(Jl!YSma11l!P, ', AHR Sllln<!ll!tl21lZ<D, : shok, property damage, personal injury or death. \=:A}- - NOT r:n=5ir.oy11ts l'lllaf'\tuat -- - Please read arefully and keep in a safe plae for future referene by a servieman.

4 TABLE OF CONTENTS 1. SAFETY NSPECTON LMTATONS NSTALLATON PRE-NSTALLATON CLEARANCE RGGNG AND HANDNG ROOF CURB DUCTWORK CONDENSATE DRAN CONNECTON NSTALLDRAN PPE REMOVAL AND CLEANNG THE DRAN PAN FLTERS ELECTRCAL WRNG POWER WRNG GROUNDNG CONTROL WRNG ARFLOW PERFORMANCE ARFLOW PERFORMANCE DATA SYSTEM OPERATON COMPRESSOR CRANKCASE HEATER OPERATON DEFROST MODE MANUAL DEFROST MODE THERMOSTAT SGNALS OPERATON CHECK-UP TROUBLE SHOOTNG...34 LST OF TABLES TABLE 2-1 UNT CLEARANCE...6 TABLE SEER HEAT PUMP W/WTHOUT ELECTRC HEAT...14 TABLE SEER COOLNG ONLYW/WTHOUT ELECTRC HEAT...15 TABLE SEER PHYSCAL DATA TABLE 7-1 SDE DUCT APPLCATON...19 TABLE 7-2 BOTTOM DUCT APPLCATON...2 TABLE 7-3 REFRGERANT CHARGE FORAC SYSTEM...22 TABLE 7-4 & 7-5 REFRGERANT CHARGE FOR H/P SYSTEM...22 TABLE 7-6 REFRGERANT CHARGE FOR AC SYSTEM...23 TABLE 7-7 & 7-8 REFRGERANT CHARGE FOR AC SYSTEM...23 TABLE 7-9 REFRGERANT CHARGE FOR A/C SYSTEM...24 TABLE 7-1 & 7-11 REFRGERANT CHARGE FOR H/P SYSTEM...24 TABLE 7-12 REFRGERANT CHARGE FOR A/C SYSTEM...25 TABLE 7-13 & 7-14 REFRGERANT CHARGE FOR H/P SYSTEM...25 TABLE 7-15 REFRGERANT CHARGE FORAC SYSTEM...26 TABLE 7-16 & 7-17 REFRGERANT CHARGE FOR HP SYSTEM...26 TABLE 7-18 REFRGERANT CHARGE FOR AC SYSTEM...27 TABLE 7-19 & 7-2 REFRGERANT CHARGE FOR H/P SYSTEM...27 TABLE 7-21 REFRGERANT CHARGE FOR AC SYSTEM...28 TABLE 7-22 & 7-23 REFRGERANT CHARGE FOR H/P SYSTEM...28 TABLE 7-24 REFRGERANT CHARGE FOR AC SYSTEM...29 TABLE 7-25 & 7-26 REFRGERANT CHARGE FOR H/P SYSTEM...29 TABLE 7-27 REFRGERANT CHARGE FOR AC SYSTEM...3 TABLE 7-28 & 7-29 REFRGERANT CHARGE FOR H/P SYSTEM...3 TABLE 8-1 THERMOSTAT SGNALS...33 LST OF FGURES FG. 2-1 COMPONENT LOCATON...5 FG. 2-2 UNT DMENSONS...6 FG. 2-3 DMENSONS BACK AND BOTTOM...7 FG. 2-4 ROOF CURB DMENSON...8 FG. 2-5 ROOF CURB DETALS...9 FG. 4-1 REMOVABLE OF CONDENSATE DRAN PAN AND REMOVAL PROCEDURE...11 FG. 6-1 TYPCAL FELD CONTROL WRNG DAGRAM...13 FG. 6-2 TYPCAL FELD POWER WRNG DAGRAM...14 AC SYSTEM WRNG DAGRAM (SNGLE PHASE)...35 HP SYSTEM WRNG DAGRAM (SNGLE PHASE)...36 AC SYSTEM WRNG DAGRAM (THREE PHASE)...37 HP SYSTEM WRNG DAGRAM (THREE PHASE)...38

5 This doument is ustomer property and is to remain with this unit. These instrutions do not over all the different variations of systems nor does it provide for every possible ontingeny to be met in onnetion with installation. All phases of this installation must omply with NATON, STATE AND LOCAL CODES. f additional information is required please ontat your loal distributor. 1. SAFETY When you see the symbols below on labels or in the manual, be alert to the potential or immediate hazards of personal injury, property and/or produt damage. t is the owner's or installer's responsibility to omply with all safety instrutions and information aompanying these symbols. WARNNG: This is a safety alert symbol indiating a potential hazard A ous situation, whih ould result in personal injury, property and/or produt damage or death. A CAUTON: This is a safety alert symbol indiating a potential hazardous situation, whih ould result in moderate personal injury, and/or property and produt damage. A WARNNG These instrutions are intended as an aid to qualified, liensed servie personnel for proper installation, adjustment and operation of this unit. Read these instrutions thoroughly before attempting installation or operation. Failure to follow these instrutions may result in improper installation, adjustment, servie or maintenane possibly resulting in fire, eletrial shok, property damage, personal injury or death. A WARNNG The manufaturer's warranty does not over any damage or defet to the heat pump aused by the attahment or use of any omponents, aessories or devies (other than those authorized by the manufaturer) into, onto or in onjuntion with the heat pump. You should be aware that the use of unauthorized omponents, aessories or devies may adversely affet the operation of the heat pump and may also endanger life and property. The manufaturer dislaimer any responsibility for suh loss or injury resulting from the use of suh unauthorized omponents, aessories or devies. A WARNNG Disonnet all power to the unit before starting maintenane. Failure to do so an result in severe eletrial shok or death. A WARNNG Do not, under any irumstanes, onnet return dutwork to any other heat produing devie suh as a fireplae insert, stove, et. Unauthorized use of suh devies may result in fire, arbon monoxide poisoning, explosion, property damage, severe personal injury or death. 3

6 A WARNNG The unit must be permanently grounded. A grounding lug is provided. Failure to ground this unit an result in fire or eletrial shok ausing property damage, severe personal injury or death. A WARNNG Only eletri heater kits supplied by this manufaturer as desribed in this publiation have been designed, tested, and evaluated by a nationally reognized safety testing ageny for use with this unit. Use of any other manufatured eletri heaters installed within this unit may ause hazardous onditions resulting in property damage, fire, bodily injury or death. A WARNNG Proposition 65: This appliane ontains fiberglass insulation. Respirable partiles of fiberglass are known to the state of California to ause aner. 1.1 NSPECTON As soon as unit is reeived, it should be inspeted and noted for possible shipping damage during transportation. t is arrier's responsibility to over the ost of shipping damage. Manufaturer or distributor will not aept the laims from dealer for any transportation damage. 1.2 LMTATONS Refer to Fig. 2-2, 2-3 for unit physial data and to Table 7-1 for eletrial dat f omponents are to be added to a unit they must meet loal odes, they are to be installed at the dealer's and /or the ustomer's expense. Size of unit for proposed installation should be based on heat loss heat gain alulations made in aordane with industry reognized proedures identified by the Air onditioning ontrators of Ameri 2. NSTALLATON 2.1 PRE-NSTALLATON Before installation, arefully hek the following: 1. Unit should be installed in aordane with national and loal safety odes, inluding but not limit to ANSNFPS No. 7 or Canadian Eletrial Code Part 1, C22.1, loal plumbing and wastewater odes and any other appliable odes. 2. For rooftop installation, be sure the struture has enough strength to support the weight of unit. Unit should be installed on roof urb and leveled. 3. For ground level installation, a level slab should be used. 4. Condenser airflow should not be restrited. 5. On appliations when a roof urb is used, the unit must be positioned on the urb so the front of the unit is tight against the urb. 4

7 2.2 CLEARANCE All units require ertain learane for proper operation and servie. Refer to Table 2-1 for the learanes required for onstrution, serviing and proper unit operation. 2.3 RGGNG AND HANDNG Exerise are when moving the unit. Do not remove any pakaging until the unit is near the plae of installation. Rig the unit by attahing hain or able slings to the lifting holes provided in the base rails. Spreader bars, whose length exeeds the largest dimension aross the unit, MUST be used aross the top of the unit. A CAUTON Before lifting, make sure the unit weight is distributed equally on the rigging ables so it will lift evenly. Units may be moved or lifted with a forklift. Slotted openings in the base rails are provided for this purpose. A CAUTON All panels must be seured in plae when the unit is lifted. The ondenser oils should be proteted form rigging able damage with plywood or other suitable material. Eletri heater assembly (optional) Condenser fan motor Highly effiient enhaned opper tube/aluminum fin outdoor oil Compressor ontator Compressor Heavy gauge removable base rails Fig. 2-1 Component Loation * The above figure for referene purpose only. 5

8 Unit size Dimensions A 24,3, /32" 42,48, /64" A Left Hi./Lo. pressure deteted valve 1/4" SAE Drain pan servie aess ompartment panel Condensate drain onnetion 3/4" NPT (Trap required) Reommended unit disonnet loation Eletrial servie aess ompapartment panel High voltage onn. 1-23/64" di knokout Low vlotage entrane 7/8" Di High voltage onn. 1-23/64" Di Fig. 2-2 Unit Dimensions The above figure for referene purpose only. Table 2-1: Unit Clearane Diretion Distane (in.) Diretion Distane (in.) Top' 6 Right 12 Front 3 Left 24 Rear 18 2 Bottom' Dut learane: 1 inh learane for all sides of air supply dut. 1. Units must be installed outdoors. Over hanging struture or shrubs should not obsure ondenser air disharge outlet. 2. The minimum learane without eonomizer/fresh air damper. For distane with Eonomizer/fresh air damper, please refer to the relevant nstall requiremnt. 3. Units may be installed on ombustible floors made from wood or lass A, B or C roof overing materials. NOTE For units applied with a roof urb, the minimum learane may be redued from 1 inh to 1/2 inh between ombustible roof urb material and this supply air dut. 6

9 Condenser oil Side supply air opening Bottom supply air opening B k Bottom ondensate drain 3/4" NPT Srew (Srew it off from nside of the unit) Bottom ontrol entry 7/8" di knokout Bottom power entry 7/8" and 1-31/32" di knokout Fig. 2-3 Dimensions Bak And Bottom * The above figures for referene purpose only. 7

10 A Dimensions 8" 14" Reommended air return dut opening size 17-1/8"x16-3/4" Reommended air supply dut opening size 17-1/8"x21-1/2" A Front Supply and return air (inluding dut support rails) shown are typial for bottom dut appliations. For loation of horizontal dut appliations (on bak of unit), refer to unit dimension details. Fig. 2-4 Roof Curb Dimension The above figures for referene purpose only. NOTE Be sure to note supply and return openings. Refer to Fig.2-3, 2-4 for information onerning rear and bottom supply and return air dut openings. 2.4 ROOF CURB On appliations when a roof urb is used, the unit must be positioned on the urb so the front of the unit is tight against the urb. (See Fig. 2-4 ROOF CURB DMENSON) 8

11 A=8' A=14' E 5/16H 7 / ( rr: :------::.,.,--::l\ / \ 1 4-3/16' "-::. +, / A '"",/ '\ \ \ 1 ) A (X) (Y) t ' ro ' f) ' 1H 4-3/16' 17-1/4' 22' v-r D A-A 7: ' Bl u l u \ r--' 9-3/16 6 (v (Y) ' (J\ u _ja 1' _... ' u (Y) ' (J\ u sl 13-5/16' B-B 2' 114'. u (Y) '(J\ u ( /1 1 1 \ \j,_.--, / u (Y) '"" ' ' u \ u (Y) 21/32 6 ' '... / :::. (\J/ / '1 21/32' l.... : 4 " \ E 1:2 ' 1 ) Fig.2-5 Roof Curb Details 9

12 3. DUCTWORK Dukwork should be made and sized by installer and in aordane with Air Manual from Conditioning Contrators of Ameria and loal odes. NOTE On dutwork exposed to outside air onditioning spae, use at least 2" of insulation and a vapor barrier. Flexible joint may be used to redue noise. These units are adaptable to downflow use as well as rear supply and return air dut openings. To onvert to downflow, use the following steps: 1. Remove the dut overs found in the bottom return and supply air dut openings. There are four (4) srews seuring eah dut over (save theses to use in step 2). 2. nstall the dut over (removed in step one) to the rear supply and return air openings. Seure with the four (4) srews used in steps one. 3. Seal dut overs with silione aulk. A losed return dut system shall be used. This shall not prelude use of eonomizers or ventilation air intake. Flexible joints may be used in the supply and return dut work to minimize the transmission of noise. A CAUTON When fastening dut work to the side dut flanges on the unit, insert the srews through the dut flanges only. DO NOT insert the srews through the asing. Outdoor dut work must be insulation and waterproofed. NOTE Be sure to note supply and return openings. Refer to Fig. 3 and 4 for information onerning rear and bottom supply and return air dut openings. 4. CONDENSATE DRAN CONNECTON Consult loal odes for speial requirements. To provide extra protetion from water damage, install an additional drain pan, provided by installer, under the entire unit with a separate drain line. Manufa turer will not be responsible for any damages due to the failure to follow these requirements. 4.1 NSTALL DRAN PPE 1. Use female NPT threaded fitting for outside onnetion and make sure that drain holes are not bloked. 2. nsulation may be needed for drain line to prevent sweating. 3. Drain pan has two drain onnetions on eah side to provide flexibility of onnetion and drainage. Make sure proper pith and plugging if seond onnetion is not used. 4. Use a sealing ompound on male pipe threads. nstall the ondensate drain line (NPT) to spill into an open drain. 1

13 Drain pan B Drain ommutator Drain onnetor tube Fig. 4-1 Removable Condensate Drain Pan And Removal Proedure 4.2 REMOVAL AND CLEAN THE DRAN PAN See above Figure.4-1 B, disonnet the Connetive Tube and Drain Commutator, srew off the two fixed srews of Drain Pan, and then along with the rail pull out the Drain Pan and Connetive Tube from the bottom of evaporator. Using a wet loth or water to wash out the drain pan arefully. 5. FLTERS Units are shipped without a filter or filter raks. t is the responsibility of the installer to seure a filter in the return air dutwork or install a filter/frame Kit. Filter must always be used and must be kept lean. When filter beome dirt laden, insuffiient air will be delivered by the blower, dereasing your units effiieny and inreasing operation osts and wear-and tear on the unit and ontrols. Filters should be heked monthly; this is espeially important sine this unit is used for both heating and ooling. 6. ELECTRCAL WRNG Field wiring must omply with the National Eletri Code (NEG) or Canadian Eletrial Code (CEC) and any appliable loal ordinane. A WARNNG Disonnet all power to unit before installing or serviing. More than one disonnet swith may be required to de-energize the equipment. Hazardous voltage an ause severe personal injury or death. 11

14 6.1 POWER WRNG 1. Proper eletrial power should be available at unit. Voltage tolerane should not be over 1% from rating voltage. 2. f any of the wire must be replaed, replaement wire must be the same type as shown in nameplate, wiring diagram and eletrial data sheet. 3. nstall a branh iruit disonnet of adequate size to handle starting urrent, loated within sight of, and readily aessible to the unit. 4. ELECTRC HEATER - f the Eletri Heater is installed, unit may be equipped with 3-6A. iruit breakers or fuse. These breaker{s} protet the internal wiring in the event of a short iruit and serve as a disonnet. Ciruit breakers installed within the unit do not provide over-urrent protetion of the supply wiring and therefore may be sized larger than the branh iruit protetion. Supply iruit power wiring must be 221 of minimum opper ondutors only. See Eletrial Data in this setion for ampaity, wire size and iruit protetor requirements. Supply iruit protetive devies may be either fuses or "HAOR" type iruit breakers. An 1-3/8" knokouts inside abinet is provided for onnetion of power wiring to eletri heater. Power wiring is onneted to the power terminal blok in unit eletri abinet. See Eletrial Heater nstallation nstrution for details. 6.2 GROUNDNG A WARNNG The unit must be permanently grounded. Failure to do so an result in eletrial shok ausing personal injury or death. Grounding may be aomplished by grounding metal onduit when installed in aordane with eletrial odes to the unit abinet. Grounding may also be aomplished by attahing ground wire{s} to ground lug{s} provided in the unit wiring ompartment. 6.3 CONTROL WRNG MPORTANT: Class 2 low voltage ontrol wiring SHOULD NOT be run in onduit with main power wiring and must be separated from power wiring, unless lass 1 wire of proper voltage rating is used. Low voltage ontrol wiring should be 18 AWG olor-oded. For lengths longer than 5ft, 16 AWG wire should be used. Two 7/8" holes an be used for ontrol wires going into the unit, one on left side and one at the bottom. Make sure, after installation, separation of ontrol wiring and power wiring has been maintained. Thermostat should be mounted on an inside wall about 58" from floor and will not be affeted by unonditioned air, sun and/or heat exposure. Follow the instrution arefully beause there are many wiring requirements. See Fig , Table

15 THERMOSTAT UNT CONTROL BOARD THERMNAL STRP ** * ***... :!:E... >.E "<til) (' V 28V COM Fig. 6-1 Typial Field Control Wiring Diagram *** 8 wire be used with heat pump system only. ** Minimum wire size of 18 AWG wire should be used for all field installed 24 volt wire. * Only required on units with supplemental eletri heat. A CAUTON Label all wire prior to disonnetion when serviing ontrols. Wiring errors an ause improper and dangerous operation. Verify proper operation after serviing. CONTACTOR Field-supplied disonnet r----::::-1 GROUND CY ro Single LUG t - [..: phase (f" )o power 1 Refer to eletrial data tables supply to size the disonnet 13

16 CONT ACTOR r----- Field-supplied disonnet / GROUND 1- (Y )>Three LUG L + _CY O---'l,,,...,..p h ase power ter to eletrial data tables -_-_CY o_j--+--',...supply to size the disonnet Fig. 6-2 Typial Field Power Wiring Diagram Table 6-1:13 SEER Heat Pump W/Without Eletri Heat Fan Supply Size. Compressors {eah) Motors Blower Eletri Heat Option Volt {Tons) {eah) Motor RLA LRA MCC FLA FLA Model kw Stages Amps 24 {2.) 36 (3.) 36 {3.) 28/ A 58 A 21.A.57A 1.73A MCA1 {Amps) None - - None 19.3 EHK-5C 3.8/ / /45.3 EHK-8C 5.6/ / /58.4 EHK-1C 7.5/ / /71.4 None - - None 24.5 EHK-5C 3.8/ / /5.5 28/ A 79A 26.A 1.8A 2.45A EHK-8C 5.6/ / /63.6 EHK-1C 7.5/ / /76.6 EHK-15C 11.3/ / /12.6 None - - None / A 73A 16.3A 1.8A 2.45A EHK-1 7.5/ / /46.7 EHK / / /61.7 None - - None 27 EHK-5C 3.8/ / /53 42 EHK-8C 5.6/ / / / A 112A 28.A 1.8A 3.53A {3.5) EHK-1C 7.5/ / /79.1 EHK-15C 11.3/ / /15.1 EHK-2C 15/ / /131.1 None - - None 32.6 EHK-5C 3.8/ / / EHK-8C 5.6/ / / / A 117A 34.A 1.74A 3.54A (4.) EHK-1C 7.5/ / / {4.) 6 {5.) 6 (5.) 28/ A 83.1A 21.4A 1.74A 3.54A 28/ A 134A 41.2A 1.74A 3.92A 28/ A 11.A 24.9A 1.74A 3.92A EHK-15C 11.3/ / /11.7 EHK-2C 15/ / /136.7 None - - None 22.5 EHK-1 7.5/ / /52.6 EHK / / /67.6 EHK-2 15/ / /82.7 None - - None 38.7 EHK-5C 3.8/ / /64.7 EHK-8C 5.6/ / /77.8 EHK-1C 7.5/ / /9.8 EHK-15C 11.3/ / /116.8 EHK-2C 15/ / /142.8 None - - None 25.7 EHK-1 7.5/ / /55.8 EHK / / /7.8 EHK-2 15/ / /86 Max Fuse2/ Breaker3 Size {Amps) 3 5/5 6/6 7/8 4 5/6 6/7 7/8 1/ /5 6/7 4 6/6 7/7 8/8 1/11 125/15 5 7/7 8/8 9/9 11/125 15/ /6 7/7 8/9 6 8/8 9/9 1/1 11/125 15/15 4 6/6 7/8 8/9 14

17 Table 6-2: 13 SEER Cooling only W/Without Eletri Heat ODFan Supply Size Compressors (eah) Motors Blower Eletri Heat Option MaxFuse21 Volt (Tons) (eah) Motor MCA1 (Amps) Breaker3 Size (Amps) RLA LRA MCC FLA FLA Model kw Stages Amps None - - None EHK-5C 3.8/ / /28.2 3/3 28/ A 58 A 21.A.57A 1.73A (2.) EHK-8C 5.6n / /41.3 4/45 36 (3.) 36 (3.) EHK-1C 7.5/ / /54.3 5/6 None - - None EHK-5C 3.8/ / /29.1 4/4 28/ A 79A 26.A 1.8A 2.45A EHK-8C 5.6n / /42.2 4/45 EHK-1C 7.5/ / /6 EHK-15C 11.3/ /81.2 8/9 None - - None / A 73A 16.3A 1.8A 2.45A EHK-1 7.5/ / /35 EHK / / / /5 None - - None 27 4 EHK-5C 3.8/ / /3.5 4/4 42 EHK-8C 5.6n / /43.6 4/45 28/ A 112A 28.A 1.8A 3.53A (3.5) EHK-1C 7.5/ / /56.6 5/6 EHK-15C 11.3/ /9 EHK-2C 15/ /18.6 1/11 None - - None 32;6 5 EHK-5C 3.8/ / /32.6 5/5 48 EHK-8C 5.6n / /43.6 5/5 28/ A 117A 34.A 1.74A 3.54A (4.) EHK-1C 7.5/ / /56.6 5/6 EHK-15C 11.3/ /9 EHK-2C 15/ /18.6 1/11 None - - None EHK-1 7.5/ / / /35 28/ A 83.1A 21.4A 1.74A 3.54A (4.) EHK / / / /5 EHK-2 15/ / /64.7 6ono 6 (5.) 6 (5.) None - - None EHK-5C 3.8/ / /38.7 6/6 EHK-8C 5.6n / /44.1 6/6 28/ A 134A 41.2A 1.74A 3.92A EHK-1C 7.5/ / /57.1 6/6 EHK-15C 11.3/ /83.1 8/9 EHK-2C 15/ /11 EHK-25C 18.8/ / / /15 None - - None EHK-1 7.5/ / /35.1 4/4 28/ A 11.A 24.9A 1.74A 3.92A EHK / / /6 EHK-2 15/ / /65.2 6ono 1. Minimum Ciruit Ampaity. 2. Maximum Over Current Protetion per Standard UL Fuse or HACR iruit breaker size installed at fatory or field installed. EHK / /9 15

18 Table 6-3: 13 SEER Physial Data Models Component MRB-24CWN1-M13 MRB-24HWN1-M13 MRB-3CWN1-M13 MRB-3HWN1-M13 MRB-36CWN1-M13 MRB-36HWN1-M13 Nominal Tonnage AR COOLNG PERFORMANCE Gross ARA point (Btu) 24,644 24,444 3,313 29,913 37,363 37,563 AR net apaity (Btu) 23,6 23,4 29, 28,6 35,8 36, EER SEER NominaiCFM System power (kw) Refrigerant type R41a R41a R41a R41a R41a R41a Refrigerant harge (lb-oz) AR HEATNG PERFGRMANCE 47 F Capaity ratinq (Btu) - 21,6 --= 28,8-36, System power (kw) F Capaity rating (Btu) - 11,3-16,2-19,6 System power (kw) HSPF (BTU/Watts-hr.) DMENSONS (nhes) Length 75-19/ / / / / /32 Width Height 28-3/ / / / /32 OPERATNG WT. (lbs) COMPRESSORS Type Sro111-spd Sroll1-spd Sroll1-spd Sroll1-spd Sroll1-spd Sroll1-spd Quantity CONDENSER COL DATA Fae area (Sq. Ft) Rows Fins per inh Tube diameter 9/32 9/32 9/32 9/32 9/32 9/32 Ciruitry type interlaed interlaed interlaed interlaed interlaed interlaed EVAPORATOR COL DATA Fae area (Sq. Ft) Rows Fins per inh Tube diameter 5/16 5/16 5/16 5/16 5/16 5/16 Ciruitry type interlaed interlaed interlaed interlaed interlaed interlaed Refrigerant ontrol Orifie Orifie Orifie Orifie Orifie Orifie CONDENSER FAN DATA Fan diameter (inh) 23-5/8 23-5/8 23-5/8 23-5/8 23-5/8 23-5/8 Type Prop Prop Prop Prop Prop Prop Drive type Diret Diret Diret Diret Diret Diret No. speeds Number of motors Motor HP eah 1/12 1/12 1/6 16 1/6 1/6 RPM Nominal total CFM DRECT DRVE EVAP FAN DATA Quantity Fan Size (nh) 1x1 1x1 1x1 1X1 1x1 1X1 Type Centrifugal Centrifugal Centrifugal Centrifugal Centrifugal Centrifugal No. speeds Motor HP eah 1/4 1/4 1/3 1/3 1/2 1/2 RPM Motor frame size FLTERS (No.) Size Reommended in. (1) 22X14x1 (1) 22X14X1 (1) 22x14x1 (1) 22x14x1 (1) 22x14x1 (1) 22x14x1 16

19 Models Component MRB-36CWN1-X13 MRB-36HWN1-X13 MRB-42CWN1-M1 MRB-42HWN1-M1 MRB-48CWN1-M13C MRB-48HWN1-M13C Nominal Tonnage AR COOLNG PERFORMANCE Gross AR A point (Btu) 37,563 35,963 41,813 41,813 49,5 5, AR net apaity (Btu) 36, 34,4 4, 4, 47,5 48, EER SEER Nominal CFM System power (kw) Refrigerant type R41a R41a R41a R41a R41a R41a Refrigerant harge (lb-oz) AR HEATNG PERFORMANCE 47 F Capaity rating (Btu) - 36, - 41,5-48, System power (kw) F Capaity rating (Btu) - 19,3-23,8-28,8 System power (kw) HSPF (BTU/Watts-hr.) DMENSONS (nhes) Length 75-19/ / / / / /32 Width Height 28-3/ / / / / /64 OPERATNG WT. (lbs) COMPRESSORS Type Sroll1-spd Sroll1-spd Sroll1-spd Sroll1-spd Sroll1-spd Sroll1-spd Quantity CONDENSER COL DATA Fae area (Sq. Ft) Rows Fins per inh Tube diameter 9/32 9/32 9/32 9/32 9/32 9/32 Ciruitry type interlaed interlaed interlaed interlaed interlaed interlaed EVAPORATOR COL DATA Fae area (Sq. Ft) Rows Fins per inh Tube diameter 5/16 5/16 5/16 5/16 5/16 5/16 Ciruitry type interlaed interlaed interlaed interlaed interlaed interlaed Refrigerant ontrol Orifie Orifie Orifie Orifie Orifie Orifie CONDENSER FAN DATA Fan diameter (inh) 23-5/8 23-5/8 23-5/8 23-5/8 23-5/8 23-5/8 Type Prop Prop Prop Prop Prop Prop Drive type Diret Diret Diret Diret Diret Diret No. speeds Number of motors Motor HP eah 1/6 1/6 1/6 1/6 1/3 1/3 RPM Nominal total CFM DRECT DRVE EVAP FAN DATA Quantity Fan Size (nh) 1x1 1x1 1x1 1x1 1x1 1x1 Type Centrifugal Centrifugal Centrifugal Centrifugal Centrifugal Centrifugal No. speeds Motor HP eah 1/2 1/2 3/4 3/4 3/4 3/4 RPM Motor frame size FLTERS (No.) Size Reommended in. (1) 22x14x1 (1) 22x14x1 (1) 22X14x1 (1) 22x14x1 (1) 22x14x1 (1) 22x14x1 17

20 Models Component MRB-48CWN1-X13 MRB-48HWN1-X13 MRB-6CWN1-M1MRB-6HWN1-M1MRB-6CWN1-X13 MRB-6HWN1-X13 Nominal Tonnage AR COOLNG PERFORMANCE Gross ARA point (Btu) 49, 47,5 61,96 62,35 59,85 59,85 AR net apaity (Btu) 47, 45,5 59,5 6, 57,5 57,5 EER SEER NominaiCFM System power (kw) Refrigerant type R41a R41a R41a R41a R41a R41a Refrigerant harge (lb-oz) AR HEATNG PERFORMANCE 47 F Capaity rating (Btu) - 48, - 6, - 59,5 System power (kw) F Capaityrating 1Btu) - 27,6-35,2-32,8 System power (kw) HSPF (BTU/Watts-hr.) DMENSONS (nhes) Length 75-19/ / / / / /32 Width Height 33-3/ / / / / /64 OPERATNG WT. (lbs) COMPRESSORS Type Sroll1-spd Sroll1-spd Sroll1-spd Sroll1-spd Sroll1-spd Sroll1-spd Quantity CONDENSER COL DATA Fae area (Sq. Ft) Rows Fins per inh Tube diameter 9/32 9/32 9/32 9/32 9/32 9/32 Ciruitry type interlaed interlaed interlaed interlaed interlaed interlaed EVAPORATOR COL DATA Fae area (Sq. Ft) Rows Fins per inh Tube diameter 5/16 5/16 5/16 5/16 5/16 5/16 Ciruitry type interlaed interlaed interlaed interlaed interlaed interlaed Refrigerant ontrol Orifie Orifie Orifie Orifie Orifie Orifie CONDENSER FAN DATA Fan diameter (inh) 23-5/8 23-5/8 23-5/8 23-5/8 23-5/8 23-5/8 Type Prop Prop Prop Prop Prop Prop Drive type Diret Diret Diret Diret Diret Diret No. speeds Number of motors Motor HP eah 1/3 1/3 1/3 1/3 1/3 1/3 RPM Nominal total CFM DRECT DRVE EVAP FAN DATA Quantity Fan Size (nh) 1x1 1X1 1X1 1x1 1x1 1X1 Type Centrifugal Centrifugal Centrifugal Centrifugal Centrifugal Centrifugal No. speeds Motor HP eah 3/4 3/ RPM Motor frame size FLTERS (No.) Size Reommended in. (1) 22x14X1 (1) 22x14x1 (1) 22x14X1 (1) 22X14X1 (1) 22x14X1 (1) 22X14X1 * The above Table data for referene only. 18

21 7. ARFLOW PERFORMANCE Airflow performane data is based on ooling performane with a oil and no filter in plae. Use this performane table for appropriate unit size, external stati applied to unit and allow operation within the minimum and maximum limits shown in table below for both ooling and eletri heat operation. 7.1 ARFLOW PERFORMANCE DATA Table 7-1 Side Dut Appliation * The above airflow data for referene only. 19

22 Table 7-2 Bottom Dut Appliation 2

23 *The above airflow data for referene only. The air distribution system has the greatest effet on airflow. The dut system is totally ontrolled by the ontrator. For this reason, the ontrator should use only industry-reognized proedures. Heat pump systems require a speified airflow. Eah ton of ooling requires between 35 and 45 ubi feet of air per minute (CFM), or 4 CFM nominally. Dut design and onstrution should be arefully done. System performane an be lowered dramatially through bad planning or workmanship. Air supply diffusers must be seleted and loated arefully. They must be sized and positoined to deliver treated air along the perimerter of the spae. f they are too small for their intended airflow, they beome noisy. f they are not loated properly, they ause drafts. Reture air grilles must be properly sized to arry air bak to the blower. f they are too small, they also ause noise. The installers should balane the air distribution system to ensure proper quiet airflow to all rooms in the home. This ensures a omfortable living spae. An air veloity meter or airflow hood an give a reading of system CFM. When installation, installer should selet the air speed aording to the atual setting stati pressure. Please refer to the Table 7-1, 7-2 ARFLOW PERFORMANCE DATA. 21

24 Table 7-3 Refrigerant harge for A/C system MRB-24CWN1-M13 Cooling Charge Chart/Tableau De Charge de Refroidissement Cooling Mode Outdoor Ambient Temperature(F)rremperature Amdiante Exterieure(en F) Mode De Refroidissement High Pressure Deteted Valve(psig)Nanne Detete de Pression Haute(en psig) ; '@ u; : (/) > (/) o "C : u; (/) Qi Cl "C ::J (/) (/) ts $ : : o > Table 7-4 Refrigerant harge for HP system MRB-24HWN1-M13 Cooling Charge Chart/Tableau De Charge de Refroidissement Cooling Mode Outdoor Ambient Temperature(F)rremperature Amdiante Exterieure(en F) Mode De Refroidissement High Pressure Deteted Valve(psig)Nanne Detete de Pression Haute(en psig) '@ '@ : (/) (/) o : "C (/) Cl "C ::J (/) (/)!!! Cl := _ : : _ _354 _ Table 7-5 Refrigerant harge for HP system MRB-24HWN1-M13 Heating Charge Chart/Tableau De Charge de Chauffage Heating Mode ndoor Dry Bulb Temperature(F)rremperature lnterieur au Themometre se( en F) Mode De Chauffage High Pressure Deteted Valve(psig)Nanne Detete de Pression Haute(en psig) 82 ; u; ; : "1ii 'a) 'a) (/) rj) o o > "C : u; rj) * "C ::J rj) rj) ts $ J : : o > 3 22

25 Table 7-6 Refrigerant harge for AC system MRB-3CWN1-M13 Cooling Mode Mode De Refroidissement "ijj. or > m > - 2 :::1 Ul rn. 5:...J '@ us. 2. Ul Ul Cll o us Ul. " () 2 Cll > Cooling Charge Chart/Tableau De Charge de Refroidissement Outdoor Ambient Temperature(F)!Temperature Amdiante Exterieure(en F) Lipuid Pressure at Small Servie Valve(psig)/Pression lipuide a a petite vanne di servie(en psig) Table 7-7 Refrigerant harge for HP system MRB-3HWN1-M13 Cooling Charge Chart/Tableau De Charge de Refroidissement Cooling Mode Outdoor Ambient Temperature(F)!Temperature Amdiante Exterieure(en F) Mode De Refroidissement Lipuid Pressure at Small Servie Valve(psig)/Pression lipuide a a petite vanne di servie( en psig) '@ "ijj '@ : "ijj rn rn Cll o "ijj rn ::: rn rn J : : Table 7-8 Refrigerant harge for HP system MRB-3HWN1-M13 Cooling Mode Mode De Refroidissement '@ "ijj. or > m > - Q5 :::1 rn rn....j '@ "ijj. rn rn Cll : "ijj rn. - - Cll > Cooling Charge Chart/Tableau De Charge de Refroidissement Outdoor Ambient Temperature(F)!Temperature Amdiante Exterieure(en F) Lipuid Pressure at Small Servie Valve(psig)/Pression lipuide a a petite vanne di servie( en psig)

26 Table 7-9 Refrigerant harge for A/C system MRB-36CWN1-M13 Cooling Charge CharUTableau De Charge de Refroidissement Cooling Mode Outdoor Ambient Temperature(F)ffemperature Amdiante Exterieure(en F) Mode De Refroidissement High Pressure Deteted Valve(psig)Nanne Detete de Pression Haute(en psig) Oi ;; ; : !!?.. Ql /).2: 1/) tl "C : Ql ;; /) Ql!! Qi Ql "C :::l Ql 1/) Ql /) $ Ql :: Ql : : tl > Table 7-1 Refngerant harge for HP system MRB-36HWN1-M13 Cooling Mode Mode De Refroidissement ;. tl > "C Qi :::l 1/) 1/) ;. &:: 1/)!/) tl &:: 1/).. "C $ &:: &:: Cooling Charge CharUTableau De Charge de Refroidissement Outdoor Ambient Temperature(F)ffemperature Amdiante Exterieure(en F) High Pressure Deteted Valve(psig)Nanne Detete de Pression Haute(en psig) Table 7-11 Refrigerant harge for HP system MRB-36HWN1-M13 Heating Charge CharUTableau De Charge de Chauffage Heating Mode ndoor Dry Bulb Temperature(F)ffemperature lnterieur au Themometre se( en F) Mode De Chauffage High Pressure Deteted Valve(psig)Nanne Detete de Pression Haute(en psig) Ol ;; Oi :. Ql /) : 399 1/) tl tl > "C : ;; /)!! Ql "C Ql :::l Ql 1/) /) $ Ql Ql : :

27 Table 7-12 Refrigerant harge for AC system MRB-36CWN1-X13 Cooling Mode Cooling Charge Chart!Tableau De Charge de Refroidissement Outdoor Ambient Temperature(F)/Temperature Amdiante Exterieure(en F) Mode De Refroidissement High Pressure Deteted Valve(psig)Nanne Detete de Pression Haute(en psig) o; 'iii.9: > "C!! :::l!!...1 o; 'iii. m 'iii "C 2 m > Table 7-13 Refrigerant harge for HP system MRB-36HWN1-X13 Cooling Mode Cooling Charge Chart!Tableau De Charge de Refroidissement Outdoor Ambient Temperature(F)/Temperature Amdiante Exterieure(en F) Mode De Refroidissement High Pressure Deteted Valve(psi Nanne Detete de Pression Haute en psig) o; 'iii. "C!! :::l!!...1 '@ 'iii. m 'iii!! "C ;a; Table 7-14 Refrigerant harge for HP system MRB-36HWN1-X13 Heating Mode Mode De Chauffage ). m > "C 2!! :::l!! 3:...1 o; 'iii. <::: m <::: 'iii!! "C Heating Charge Chart!Tableau De Charge de Chauffage ndoor Dry Bulb Temperature(F)/Temperature lnterieur au Themometre se( en F) HiQh Pressure Deteted Valve(psig Nanne Detete de Pression Haute en psig)

28 Table 7-15 Refrigerant harge for AC system MRB-42CWN1-M13 Cooling Mode Mode De Refroidissement C> u; ar > (ij > "C t).s :J rn. _. u; t: rn rn tl D t: u; rn. "C.s Cl t: t: Cooling Charge Chart/Tableau De Charge de Refroidissement Outdoor Ambient Temperature(F}fTemperature Amdiante Exterieure(en F) High Pressure Deteted Valve(psig)Nanne Detets de Pression Haute(en psig) Table 7-16 Refrigerant harge for HP system MRB-42HWN1-M13 Cooling Mode Mode De Refroidissement C> u; ar > "C "*... :J. := _. '@ u; t: rn rn tl D t: u; rn. "C : Cl t: t: Cooling Charge Chart/Tableau De Charge de Refroidissement Outdoor Ambient Temperature(F)fTemperature Amdiante Exterieure(en F) High Pressure Deteted Valve(psig)Nanne Detets de Pression Haute(en psig) Table 7-17 Refrigerant harge for HP system MRB-42HWN1-M13 Heating Mode Mode De Chauffage '@ 135 u; 128 C> u; t: rn rn 17 (ij ro D > 1 t: "C u; 93 t) rn 86.$. 79 "C 72 :J 65 rn t) 58.s. 51 Cl 44 _. t: t: Heating Charge Chart/Tableau De Charge de Chauffage ndoor Dry Bulb Temperature(F)fTemperature lnterieur au Themometre se( en F) High Pressure Deteted Valve(psig)Nanne Detets de Pression Haute(en psig)

29 Table R e n ngeran t harge nor A!C sysem t MRB-48CWN1-M13C Cooling Charge Chart/Tableau De Charge de Refroidissement Cooling Mode Outdoor Ambient Temperature(F)ffemperature Amdiante Exterieure(en F) Mode De Refroidissement High Pressure Deteted Valve(psig)Nanne Detete de Pression Haute(en psig) Cl Cl t:..! Cl).2: m 1: t: "".Q J m Cl) "" Cl) (]) Cl).. ;a; Cl) t: t: Table 7-19 Refrigerant harge for HP system MRB-48HWN1-M13C Cooling Charge Chart/Tableau De Charge de Refroidissement Cooling Mode Outdoor Ambient Temperature(F)ffemperature Amdiante Exterieure(en F) Mode a De Refroidissement High Pressure Deteted Valve(psig)Nanne Detete de Pression Haute(en psig) : ; Cl t:..e,.! Cl) m 1: t: "".Q J m Cl) "" Cl) (]) (]) Cl)...1 t: t: Table 7-2 Refrigerant harge for HP system MRB-48HWN1-M13C Heating Charge Chart/Tableau De Charge de Chauffage Heating Mode ndoor Dry Bulb Temperature(F)ffemperature lnterieur au Themometre se( en F) Mode De Chauffage High Pressure Deteted Valve(psig Nanne Detete de Pression Haute(en psig) Cl Ci t:..! Cl).2: m 1: "" t: Cl).Q m Cl) "" Cl) (]) (]) 3: Cl)...1 t: t:

30 Ti.abe 7-21 R e fj ngeran t h arge n or AC sysem t MRB-48CWN1-X13 Cooling Mode Cooling Charge CharUTableau De Charge de Refroidissement Outdoor Ambient Temperature(F)fTemperature Amdiante Exterieure(en F) Mode De Refroidissement High Pressure Deteted Valve(psig Nanna Detete de Pression Haute(en psig) ; - Cl :::3... ; o J $ Cl Table 7-22 Refrigerant harge for HP system MRB-48HWN1-X13 Cooling Mode Cooling Charge CharUTableau De Charge de Refroidissement Outdoor Ambient Temperature(F)fTemperature Amdiante Exterieure(en F) Mode De Refroidissement High Pressure Deteted Valve(psig)Nanne Detete de Pression Haute(en psig) ; > "ffi > - -a; Cl :::3... s:..j ; o... - $ Gl Cl Table 7-23 Refrigerant harge for HP system MRB-48HWN1-X13 Heating Mode Mode De Chauffage 135 ; 128 ; o Cl :::3 65 $ Cl 51..J Heating Charge CharUTableau De Charge de Chauffage ndoor Dry Bulb Temperature(F)fTemperature lnterieur au Themometre se(en F) High Pressure Deteted Valve(psig)Nanne Detete de Pression Haute(en psig)

31 Table 7-24 Refrigerant harge for A!C system MRB-6CWN1-M13 Cooling Mode Mode De Refroidissement Ci > m > "C $ :::1 U) U) ll. == -1 Cl :: (j) U) U) m o :: U) e! ll. "C 2 :: :: Cooling Charge Chart/Tableau De Charge de Refroidissement Outdoor Ambient Temperature(F)fremperature Amdiante Exterieure(en F) High Pressure Deteted Valve(psi J)Nanne Detete de Pression Haute(en psig) Tabte 7-25 R e fj. rtgeran t h arge nor HP sysem t MRB-6HWN1-M13 Cooling Mode Mode De Refroidissement Ci "C '* :::1 ll. == -1 Cl :: U) U) m o :: U) e! ll. "C 2 Cooling Charge Chart/Tableau De Charge de Refroidissement Outdoor Ambient Temperature(F)fremperature Amdiante Exterieure(en F) High Pressure Deteted Valve(psig)Nanne Detete de Pression Haute(en psig) Table 7-26 Refrigerant harge for HP system MRB-6HWN1-M13 Heating Mode Mode 6 62 De Chauffage Ci Ci rn f rn m 1 35 "C ts '* "C ::: ts m > Heating Charge Chart/Tableau De Charge de Chauffage ndoor Dry Bulb Temperature(F}fremperature lnterieur au Themometre se(en F) High Pressure Deteted Valve(psig}Nanne Detete de Pression Haute(en psig}

32 Table 7-27 Refrigerant harge for AC system MRB-6CWN1-X13 Cooling Charge Chart/Tableau De Charge de Refroidissement Cooling Mode Outdoor Ambient Temperature(F)!Temperature Amdiante Exterieure(en F) Mode De Refroidissement High Pressure Deteted Valve(psig)Nanne Detete de Pression Haute en psig) Ci 'iii Ci : 'iii fll fll > ' :.iii fll m!! !! ' :::l fll fll !!.J!! : : > Table 7-28 Refrigerant harge for HP system MRB-6HWN1-X13 Cooling Charge Chart/Tableau De Charge de Refroidissement Cooling Mode Outdoor Ambient Temperature(F!Temperature Amdiante Exterieure(en F) Mode De Refroidissement High Pressure Deteted Valve(psig Nanne Detete de Pression Haute en psig) : fll.. Ci : 'iii.. ar fll fll ' : 'iii fll m!! !! ' :::l fll fll !!.J!! : : Table 7-29 Refrigerant harge for HP system MRB-6HWN1-X13 Heating Mode Heating Charge Chart/Tableau De Charge de Chauffage ndoor Dry Bulb Temperature(F)!Temperature lnterieur au Themometre se( en F) Mode De Chauffage High Pressure Deteted Valve(psig)Nanne Detete de Pression Haute en psig) Ci 'iii.. ar > ' -m!! :::l fll fll!! :21 fll. : fll fll : 'iii fll!! ' : :

33 8. SYSTEM OPERATON 8.1 COMPRESSOR CRANKCASE HEATER(FOR HP SYSTEM ONLY) Refrigerant migration during the off yle an result in a noisy start up. Add a rankase heater to minimize refrigeration migration, and to help eliminate any start up noise or bearing "wash out". All heaters are loated on the lower half of the ompressor shell. ts purpose is to drive refrigerant from the ompressor shell during long off yles, thus preventing damage to the ompressor during start-up. At initial start-up or after extended shutdown periods, make sure the heater is energized for at least 12 hours before the ompressor is started. (Disonnet swith on and wall thermostat off.} The rankase heater start-up onditions: f the outdoor ambient temp. is <37.4 F and the ompressor stopped for more than three hours or the unit powered on one more, the rank heater will be on. Crankase heater shut-down onditions: fthe outdoor ambient temp. is >44.6 F or the ompressor start running,the rank heater will be off. 8.2 Protetion Protetion for AC system Disharge temperature protetion {for the unit whih adopt Toshiba ompressor): When disharge temp. is >275 F,the ompressor will be off, When disharge temp. is <194 F,the ompressor will start running. High pressure protetion {for the unit whih adopt Toshiba ompressor} When high pressure is >638PSG,the ompressor and the outdoor fan motor will stop running. When high pressure is <464PSG,the ompressor and the outdoor fan motor will start running(3 minutes delay neessary ). Low pressure protetion {for the unit whih adopt Toshiba ompressor} When low pressure is <21 PSG,the ompressor and the outdoor fan motor will stop running. When low pressure is > 44PSG,the ompressor and the outdoor fan motor will start running(3 minutes delay neessary). n stand-by status, if low pressure protetion was heked out, the ompressor would not start running. f protetion yles our four times within 3 mins, the system must power on one more Protetion for HP system When the sensor(t3&t4) was heked open-iruit or short-iruit, the ompressor,outdoor fan motor and 4-way valve will be off. Disharge temperature protetion: When disharge temp. is> 275 F,the ompressor will be off, When disharge temp. is < 194 F,the ompressor will start running. 31

34 High pressure protetion When high pressure is >638PSG,the ompressor and the outdoor fan motor will stop running. When high pressure is <464PSG,the ompressor and the outdoor fan motor will start running(3 minutes delay neessary }. Low pressure protetion When low pressure is <21PSG,the ompressor and the outdoor fan motor will stop running. When low pressure is >44PSG,the ompressor and the outdoor fan motor will start running(3 minutes delay neessary }. n stand-by status, if low pressure protetion was heked out, the ompressor would not start running. f protetion yles our four times within 3 mins, the system must power on one more. T4 funtion: When T4 is < 5 F, the ompressor will stop. f the eletrial heater kit is installed in the indoor unit, the outdoor unit will send the operation signal to the indoor unit. When T4 is> 1.4 F, the ompressor will restart 8.3 DEFROST MODE* (For HP system only) Defrosting ondition: When JUMP swith is set to "1 ", the defrost mode will start if one of following onditions is satisfied: 1. Compressor keeps running, when T4 is> 28.4 of and T3 is< 32 of and last for 4 minutes; 2. Compressor keeps running, when T4 is< 28.4 of and T3 is< 32 of and last for 5 minutes. *When defrosting ations, if the eletrial heater kit is installed, the unit would deliver the Aux. heater operation signal to the eletrial heater kit. When JUMP swith is set to "": Compressor keeps running, when T3 is < 32 of and last for 3 minutes. Ending onditions of defrost mode: The mode will end if one of following onditions is satisfied: 1. The defrosted time lasting for 1 minutes; 2. When JUMP swith is set to "1", T3 is <!:64.4 F; 3. When JUMP swith is set to "", T3 is <!:77 F. 8.4 MANUAL DEFROST MODE (For HP system only) When MANUAL DEFROST swith in PCB is set to "1", system will perform as above 8.3 desription. When the swith is set to "", T3<32 F, ompressor keeps running and lasting for 4 seonds, the system turns to the Defrost Mode. By the logi of 8.3 to exit the Defrost Mode. Caution: One finishes the manual defrost, please swith the MANUAL DEFROST in PCB to "1". 8.5 THERMOSTAT SGNALS Table 8-1: Thermostat Signals 32

35 Table 8-1: Thermostat Signals OFF ON OFF Blower instant ON Heater 1 instant ON Heater 2 instant ON Blower 9 se. delay OFF Heater 1 instant OFF Heater 2 instant OFF ON OFF ON OFF ON OFF Blower instant ON Compressor and outdoor fan instant ON 4-way valve instant ON Compressor and outdoor fan instant OFF Blower fan delay 9 se. OFF 4-way valve instant OFF Blower instant ON Compressor and outdoor fan instant ON 4-way valve instant ON Heater 1 instant ON Blower fan delay 9 se. OFF Compressor and outdoor fan instant OFF 4-way valve instant OFF Heater 1 instant OFF Blower instant ON Compressor and outdoor fan instant ON 4-way valve instant ON Heater 1 instant ON Heater 2 instant ON Blower fan delay 9 se. OFF Compressor and outdoor fan instant OFF 4-way valve instant OFF Heater 1 instant OFF Heater 2 instant OFF 33