Lennox XC21 - Manual
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Table of Contents:
- Page 2 – SIDE VIEW; WARNING
- Page 3 – ELEVATED SLAB MOUNTING USING FEET; CAUTION −
- Page 5 – OR; FLUSHING LINE SET; FIGURE 6
- Page 6 – STEP 2 −− REFRIGERANT PIPING −− Brazing Procedures; PIPING PANEL REMOVAL / PREPARING LINE SET; CAP AND CORE REMOVAL
- Page 7 – BRAZE LINE SET; FIGURE 8
- Page 8 – STEP 3 −− INSTALLING INDOOR EXPANSION VALVE; Product; FIGURE 9
- 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 10 – STEP 4 −− LEAK TEST AND EVACUATION (Continued); Possible equipment damage.; EVACUATION
- Page 11 – STEP 5 −− ELECTRICAL −− Circuit Sizing and Wire Routing; 4VAC TRANSFORMER; NO T E; INSTALL THERMOSTAT
- Page 12 – A. ROUTE CONTROL WIRES NON−COMMUNICATING
- Page 13 – Communication System; Set up of jumpers on
- Page 14 – STEP 5 −− ELECTRICAL (Continued) −− Field Control Wiring; −enabled thermostat; DS; ComfortSense; Air Handler
- Page 15 – Furnace
- Page 16 – TWO−STAGE COMPRESSOR PERFORMANCE
- Page 17 – XC21 Field Operational Checklist
- Page 18 – XC21 Start−Up and Performance Checklist; START−UP CHECKS
- Page 19 – Homeowner Information; CAUTION; Outdoor Coil; Thermostat Operation
Page 1
7/2012
506923−01
*2P72012*
*P506923-01*
E
2012 Lennox Industries Inc.
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
WARNING
The State of California has determined that this product
may contain or produce a chemical or chemicals, in very
low doses, which may cause serious illness or death. It
may also cause cancer, birth defects, or reproductive
harm.
General
This XC21 outdoor unit is designed for use with HFC−410A
refrigerant only. This unit must be installed with an ap-
proved indoor unit. See the Lennox XC21 Product Specifi-
cations bulletin (EHB) for approved indoor component
match ups.
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
INSTALLATION
INSTRUCTIONS
Dave Lennox
Signature
®
Collection XC21 System
AIR CONDITIONERS
506923−01
7/2012
Supersedes 4/2012
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause property damage, personal inju-
ry or loss of life.
Installation and service must be performed by a licensed
professional installer (or equivalent) or service agency.
CAUTION
Before attempting to perform any service or mainte-
nance, turn the electrical power to unit OFF at discon-
nect switch.
NOTICE !
For more in−depth information, consult the Installa-
tion and Service Procedures manual, available as
Corp.1007−L2 on DaveNet or through the Technical
Support department at 800−453−6669.
STEP 1 −− SETTING THE UNIT −− Clearances
CONTROL
PANEL ACCESS
LOCATION
6 (152)
36 (914)
12 (305)
30 (762)
24
(610)
LINE SET
CONNECTIONS
ACCESS PANEL
REAR VIEW OF UNIT
48 (1219)
MINIMUM CLEARANCE BETWEEN TWO UNITS
CLEARANCE ON ALL SIDES INCHES (MILLIMETERS)
MINIMUM CLEARANCE
ABOVE UNIT
NOTES:
S
Clearance to access panel must be 30
inches (762mm).
S
Clearance to one of the other three
sides must be 36 inches (914mm).
S
Clearance to one of the remaining two
sides may be 12 inches (305mm) and
the final side may be 6 inches
(152mm).
FIGURE 1
Litho U.S.A.
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Summary
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 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 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...
