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38MVC/40MVC
38MVQ/40MVQ
Comfortt Series High---Wall Duct---Free Split System
Sizes009 --- 024
ServiceManual
TABLEOFCONTENTS
SAFETY CONSIDERATIONS
PAGE
Improper installation, adjustment, alteration, service, maintenance,
SAFETY CONSIDERATIONS ......................... 1 or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
STANDARD FEATURES AND ACCESSORIES........... 2
damage. Consult a qualified installer, service agency, or y
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MODELNUMBERNOMENCLATURE INDOOR UNIT 40 MVC 018 3---01 --- Voltage --- --- 30VDC 1 --- 115---1---60 Fan Coil Unit 3 --- 208/230---1---60 NominalCapacity 009 --- 3/4 Ton 012 --- 1 Ton UnitType 018 --- 1---1/2 Ton MVC --- Cooling Only 024 --- 2 Tons MVQ --- Heat Pump OUTDOORUNIT 38 MVC 018 3---01 --- Voltage 1--- 115---1---60 Air---Cooled Condenser 3--- 208/230---1---60 NominalCapacity 009 --- 3/4 Ton UnitType 012 --- 1 Ton MVC --- Cooling Only 018 --- 1---1/2 Ton MVQ --- Heat Pump 024 --- 2 Tons S
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STANDARDFEATURESANDACCESSORIES EaseOfInstallation INDOORUNITS Mounting Brackets S LowVoltageControls S ComfortFeatures MicroprocessorControls S WirelessRemoteControl S AutomaticAir Sweep S AirDirection Control S AutoRestartFunction S Cold BlowProtection On HeatPumps S Turbo Mode On Sizes 9K and 12 K S AutoChangeoverOn HeatPumps S EnergySavingFeatures Sleep Mode S A07892 Stop/StartTimer S SafetyAndReliability Fig.1–CondensatePump 3MinuteTimeDelayForCompressor S On high wallfan coils,thecondensate
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SPECIFICATIONS-- COOLINGONLYUNITS SystemModelNumber 53MVC009---------1 53MVC012---------1 53MVC012---------3 53MVC018---------3 SystemVoltage 115V 115V 208/230 208/230 ControlVoltage 0 --- 12 Pulse DC 0 --- 12 Pulse DC 0 --- 12 Pulse DC PulseDC Capacity (Btuh) 9000 12000 12000 18000 SEER 13.0 13.0 13.0 13.0 RefrigerantType R---410A Design Pressure(PSIG) 550 550 550 550 Metering Device CapillaryTubeinOutdoorUnit Charge(lb) 2.3 2.9 3.0 4.4 Type Rotary Model EA82X1C---1FZDU1 EA108X1C---1FZDU1 PA108
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SPECIFICATIONS-- HEATPUMPUNITS SystemModelNumber 53MVQ009---------1 53MVQ012---------1 53MVQ012---------3 53MVQ018---------3 SystemVoltage 115V 115V 208/230 208/230 ControlVoltage 0 --- 12 Pulse DC 0 --- 12 Pulse DC 0 --- 12 Pulse DC PulseDC Capacity (Btuh) 9000 12000 12000 18000 SEER 13.0 13.0 13.0 13.0 HSPF 7.7 7.7 7.7 7.7 RefrigerantType R---410A Design Pressure(PSIG) 550 550 550 550 Metering Device CapillaryTubesinOutdoorUnit Charge(lb) 2.35 3.0 3.0 Type Rotary Model EA82X1C---1FZDU1 EA108X1
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DIMENSIONS -- INDOOR A07336 W H D ModelSize Weight lb(kg) in.(mm) in.(mm) in.(mm) 9K 32.09(815) 11.02(280) 7.68(195) 24.2 (11) 12K 35.67(906) 11.26(286) 9.25(235) 33.0 (15) 18K 49.21(1250) 12.80(325) 9.06(230) 55.0 (25) 55.0 (25) 24K 49.21(1250) 12.80(325) 9.06(230) DIMENSIONS -- OUTDOOR Air Flow W L1 35 A07337 W H L1 L2 L3 Weight lb(kg) Weight lb(kg) ModelSize CoolingOnly HeatPumps in.(mm) in.(mm) in.(mm) in.(mm) in.(mm) 77.0(35) 79.2(36) 9K 30.71(780) 21.26(540) 21.61(549) 11.81(300) 10.87(276
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CLEARANCES -- INDOOR 6" (0.15m) min. 5" 5" (0.13m) (0.13m) min. min. (1.8m) 6' A07891 Fig.2–Indoorunitclearance CLEARANCES -- OUTDOOR A Air-inlet E D B C Air-outlet A07894 UNIT 9k and 12k in. (mm) 18kand24kin.(mm) A 24(610) 24(610) B 24(610) 36(914) C 24(610) 24(610) D 4(102) 12(305) E 12(305) 12(305) Fig.3–OutdoorUnitClearance 7 38/40MVC,MVQ
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SYSTEMOPERATINGENVELOPE 53MVC/MVQ System Operating Envelope Chart Outdoor Temperature (ºC) -40 -35 -30 -25 -20 -15 -10 -5 0 5 1015202530354045505560 120 60 55 110 50 100 45 40 90 35 85º F 80 80ºF 30 Cooling Continuous 25 Heating 70 Operation Continuous 20 Operation 62ºF 60 15 55ºF 125º 10 55º 75ºF 50 5ºF 5 40 0 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 Outdoor Temperature (ºF) Uselowambientcontroliftheunitwilloperateincoolingatambientconditionsbelow55_F(12.78
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WIRING The main power is supplied to the outdoor unit. The field supplied connecting cable from the outdoor unit to indoor unit consists of four wiresand providesthepowerfortheindoorunitaswellasthecommunication signalbetween theoutdoorunitand indoorunit. Voltagedrop on theconnecting cableshould bekeptto aminimum. Usecablesizeand max length below: 18AWG 50ft.(16m) 16AWG 100ft.(33m) CONNECTIONDIAGRAMS CONNECTING CABLE CONTROL CONTROL CONNECTING CABLE CONNECTING CABLE Notes: 1.Donotusethermostatwir
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10 38/40MVC,MVQ WIRINGDIAGRAMS Fig.6–WiringDiagram38MVC009------1W/40MVC009------1
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11 WIRINGDIAGRAMS(CONT.) Fig.7–WiringDiagram38MVC012------1W/40MVC012------1 38/40MVC,MVQ
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12 38/40MVC,MVQ WIRINGDIAGRAMS(CONT.) Fig.8–WiringDiagram38MVC012------3W/40MVC012------3
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13 WIRINGDIAGRAMS(CONT.) Fig.9–WiringDiagram38MVC018------3W/40MVC018------3 38/40MVC,MVQ
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14 38/40MVC,MVQ WIRINGDIAGRAMS(CONT.) Fig.10–WiringDiagram38MVQ009------1W/40MVQ009------1
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15 WIRINGDIAGRAMS(CONT.) Fig.11–WiringDiagram38MVQ012------1W/40MVQ012------1 38/40MVC,MVQ
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16 38/40MVC,MVQ WIRINGDIAGRAMS(CONT.) Fig.12–WiringDiagram38MVQ012------3W/40MVQ012------3
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REFRIGERATIONCYCLEDIAGRAM FIELD PIPING FLARE CONNECTION TWO PHASE LIQUID LINE CAPILLARY TUBE SERVICE VALVE HEAT HEAT EXCHANGER EXCHANGER (CONDENSER) (EVAPORATOR) SERVICE VALVE W/GUAGE PORT SUCTION LINE FLARE CONNECTION COMPRESSOR FIELD PIPING A08104 Fig.13–Cooling INDOOR UNIT OUTDOOR UNIT FLARE CONNECTION CHECK VALVE TWO PHASE (HEATING MODEL ONLY) LIQUID LIQUID HTG CAPILLARY TUBE SERVICE VALVE HEAT HEAT EXCHANGER EXCHANGER (CONDENSER) (EVAPORATOR) SERVICE VALVE SUCTION W/ GUAGE PORT DISCHARGE
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LongLineApplications,38MVCUnits: REFRIGERANTLINES 1. A crankcase heater should be added for line lengths longer Generalrefrigerantlinesizing: than 25 ft (7.62 m) to preventthe migration of refrigerantto 1. The 38MVC/MVQ units are shipped with a full charge of thecompressorduring the“OFF”cycle. R410A refrigerant. All charges, line sizing, and capacities 2. A field fabricated wind baffleisrecommended. are based on runs of 25 ft (7.6 m). For runs over 25 ft (7.6 3. No changein linesizing isrequired
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DeepVacuumMethod SYSTEMEVACUATIONAND The deep vacuum method requires a vacuum pump capable of CHARGING pulling a vacuum of 500 microns and a vacuum gage capable of accurately measuring thisvacuumdepth.Thedeep vacuummethod is the most positive way of assuring a system is free of air and ! CAUTION liquid water.(SeeFig.17) 5000 UNITDAMAGEHAZARD 4500 Failure to follow this caution may result in equipment 4000 damageorimproperoperation. LEAKIN 3500 SYSTEM Neverusethesystem compressorasavacuum pump. 3
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CONTROLSYSTEM The40MVC/MVQ unitisequipped with amicroprocessorcontrolto perform two functions: 1. Providesafety forthesystem 2. Controlthesystem and provideoptimum levelsofcomfortand efficiency The main microprocessor is located on the control board of the fan coil unit (outdoor units have a microprocessor too) with thermistors located in thefan coilairinletand on theindoorcoil. Heatpump unitshaveathermistoron theoutdoorcoil. Thesethermistors monitorthe system operation to maintain the unit with
