Lennox XC21 - Manuals

Lennox XC21 – Manual in PDF format online.

Manuals:

Manual

Manual Lennox XC21

Summary

Page 2 - SIDE VIEW; WARNING

Page 2 UNIT DIMENSIONS − INCHES (MM) 39−1/2 (1003) 35−1/2 (902) 47 (1194) 18−1/2 (470) 8 (203) 1 (25) 4−1/2(114) LIQUIDLINEINLET ELECTRICAL INLETS SIDE VIEW ACCESS VIEW DISCHARGEAIR 4−5/8(117) BASE WITH ELONGATED LEGS 16−7/8 (429) 8−3/4 (222) 26−7/8 (683) 3−3/4 (95) 30−3/4 (781) 3−1/8 (79) SUCTIOnLI...

Page 3 - ELEVATED SLAB MOUNTING USING FEET; CAUTION −

Page 3 XC21 SERIES INSTALL UNIT AWAY FROM WINDOWS TWO 90 _ ELBOWS INSTALLED IN LINE SET WILL REDUCE LINE SET VIBRATION PLACEMENT FIGURE 2 Install unit level or, if on a slope, maintain slope tolerance of 2degrees (or 2 inches per 5 feet [50 mm per 1.5 m]) away frombuilding structure. GROUND LEVEL MO...

Page 5 - OR; FLUSHING LINE SET; FIGURE 6

Page 5 XC21 SERIES STEP 2 −− REFRIGERANT PIPING −− Removing Existing Indoor Metering Device SENSING LINE TEFLON ® RING FIXED ORIFICE BRASS NUT LIQUID LINE ASSEMBLY (INCLUDES STRAINER) LIQUID LINE ORIFICE HOUSING DISTRIBUTOR TUBES DISTRIBUTOR ASSEMBLY REMOVE AND DISCARD WHITE TEFLON ® SEAL (IF PRESEN...

Page 6 - STEP 2 −− REFRIGERANT PIPING −− Brazing Procedures; PIPING PANEL REMOVAL / PREPARING LINE SET; CAP AND CORE REMOVAL

Page 6 STEP 2 −− REFRIGERANT PIPING −− Brazing Procedures ATTACH THE MANIFOLD GAUGE SET FOR BRAZINGLIQUID AND SUCTION / VAPOR LINE SERVICE VALVES OUTDOOR UNIT LIQUID LINE SUCTION / VAPOR LINE LIQUID LINE SERVICE VALVE SUCTION / VAPOR LINE SERVICE VALVE ATTACH GAUGES INDOOR UNIT SUCTION / VAPOR SERVI...

Page 7 - BRAZE LINE SET; FIGURE 8

Page 7 XC21 SERIES CAUTION Brazing alloys and flux contain materials which arehazardous to your health.Avoid breathing vapors or fumes from brazingoperations. Perform operations only in well−ventilatedareas.Wear gloves and protective goggles or face shield toprotect against burns.Wash hands with soa...

Page 8 - STEP 3 −− INSTALLING INDOOR EXPANSION VALVE; Product; FIGURE 9

Page 8 STEP 3 −− INSTALLING INDOOR EXPANSION VALVE This outdoor unit is designed for use in systems that include an expansion valve metering device. See the XC21 Product Specifications bulletin (EHB) for approved expansion valve kit match−ups and application information. The expansion valve can be i...

Page 9 - STEP 4 −− LEAK TEST AND EVACUATION; CONNECT GAUGE SET; TEST FOR LEAKS; Close the valve on the HFC−410A cylinder and the valve on

Page 9 XC21 SERIES STEP 4 −− LEAK TEST AND EVACUATION TO VAPOR SERVICE VALVE HFC−410A MANIFOLD GAUGE SET OUTDOOR UNIT HIGH LOW CONNECT GAUGE SET A. Connect the high pressure hose of an HFC−410A manifold gauge set to the vapor valve service port. NOTE Normally, the high pressure hose is connected to ...

Page 10 - STEP 4 −− LEAK TEST AND EVACUATION (Continued); Possible equipment damage.; EVACUATION

Page 10 STEP 4 −− LEAK TEST AND EVACUATION (Continued) A. Open both manifold valves and start the vacuum pump. B. Evacuate the line set and indoor unit to an absolute pressure of 23,000 microns (29.01 inches of mercury). NOTE During the early stages of evacuation, it is desirable to close the manifo...

Page 11 - STEP 5 −− ELECTRICAL −− Circuit Sizing and Wire Routing; 4VAC TRANSFORMER; NO T E; INSTALL THERMOSTAT

Page 11 XC21 SERIES STEP 5 −− ELECTRICAL −− Circuit Sizing and Wire Routing In the U.S.A., wiring must conform with current local codesand the current National Electric Code (NEC). In Canada,wiring must conform with current local codes and the currentCanadian Electrical Code (CEC).Refer to the furna...

Page 12 - A. ROUTE CONTROL WIRES NON−COMMUNICATING

Page 12 NOTE For proper voltages, select control wires gauge per table below. WIRE RUN LENGTH AWG# INSULATION TYPE LESS THAN 100’ (30 METERS) 18 TEMPERATURE RATING MORE THAN 100’ (30 METERS) 16 35ºC MINIMUM. NOTE Wire tie provides low voltage wire strain relief and maintains separation of field−inst...

Page 13 - Communication System; Set up of jumpers on

Page 13 XC21 SERIES STEP 5 −− ELECTRICAL (Continued) −− Outdoor Control (A175) Jumpers and Terminals 55 50 DEGREE TARGET 45 DEGREE TARGET 40 DEGREE TARGET (DEFAULT) 55 50 45 40 55 50 45 40 55 50 45 40 55 50 45 40 DEGREE TARGET 100 90 DEGREE TARGET 70 DEGREE TARGET 50 DEGREE TARGET 100 90 70 50 DEGRE...

Page 14 - STEP 5 −− ELECTRICAL (Continued) −− Field Control Wiring; −enabled thermostat; DS; ComfortSense; Air Handler

Page 14 STEP 5 −− ELECTRICAL (Continued) −− Field Control Wiring The following two illustrations provide examples of control wiring connections when using a non−communicating thermostat.For examples of control wiring in complete or partial communicating systems, see the icomfort t −enabled thermosta...

Page 15 - Furnace

Page 15 XC21 SERIES Y1 O R W1 G D R Y1 L C C B Y2 Y2 W O DS L T T W2 H H O C L Y2 DS DH G R Y1 W2 W1 1 2 4 5 Furnace ComfortSense [ 7000 Thermostats Catalog # Y0349 or Y2081 XC21 Two − Stage Air Conditioner Control On − board link Low voltage thermostat wiring 3 1. Thermostat T terminals are used fo...

Page 16 - TWO−STAGE COMPRESSOR PERFORMANCE

Page 16 Charging The XC21 unit is factory−charged with enough HFC−410Arefrigerant to accommodate a 15−foot length of refrigerantpiping. Charge should be checked and adjusted using thetables provided on the charging procedure sticker on theunit access panel. Detailed information is given in theXC21 I...

Page 17 - XC21 Field Operational Checklist

Page 17 XC21 SERIES XC21 Field Operational Checklist Unit Readings Cooling*** Heating*** Y1 First Stage Expected results during Y2 demand (toggle switch ON) Y2 Second Stage Y1 First Stage Expected results during Y2 demand (toggle switch ON) Y2 Second Stage Compressor Voltage Same Same Amperage Highe...

Page 18 - XC21 Start−Up and Performance Checklist; START−UP CHECKS

Page 18 XC21 Start−Up and Performance Checklist Customer Address Indoor Unit Model Serial Outdoor Unit Model Serial Solar Module Mfg and Model Serial Notes: START−UP CHECKS Refrigerant Type: Rated Load Amps Actual Amps Rated Volts Actual Volts Condenser Fan Full Load Amps Actual Amps: COOLING MODE V...

Page 19 - Homeowner Information; CAUTION; Outdoor Coil; Thermostat Operation

Page 19 XC21 SERIES Homeowner Information CAUTION Before attempting to perform any service or mainte-nance, turn the electrical power to unit OFF at discon-nect switch. Cleaning of the outdoor unit’s coil should be performed bya licensed professional service technician (or equivalent).Contact your d...