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STEP 1 -- SETTING THE UNIT (Continued) -- Dimensions / Placement

UNIT DIMENSIONS - INCHES (MM)

4-5/8
(117)

39.40”
(1003)

35.50”

(902)

18.60”

(470)

8.00” (203)

1 (25)

LIQUID
LINE
INLET

SUCTION LINE
INLET

ELECTRICAL INLETS

BASE WITH 
ELONGATED LEGS

SIDE VIEW

ACCESS VIEW

DISCHARGE AIR

[-030 THROUGH -042] 

41 (1040)

[-024, -048, -060] 

47 (1194)

16-7/8

(429)

8-3/4
(222)

26-7/8

(683)

3-3/4 (95)

30-3/4

(781)

3-1/8

(79)

UNIT SUPPORT

FEET

WARNING

To prevent personal injury, as well as damage to panels,
unit or structure, observe the following:

While installing or servicing this unit, carefully stow all
removed panels so that the panels will not cause injury
to personnel, objects or nearby structures. Also, take
care to store panels where they will not be subject to
damage (e.g., being bent or scratched).

While handling or stowing the panels, consider any
weather conditions (especially wind) that may cause
panels to be blown around and damaged.

CAUTION

As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and use protective
clothing.

NOTICE !

Roof Damage!
This system contains both refrigerant and oil. Some
rubber roofing material may absorb oil, causing the
rubber to degrade. Failure to follow this notice
could result in damage to roof surface.

IMPORTANT !

Exhaust vents from dryers, water heaters and
furnaces should be directed away from the outdoor
unit. Prolonged exposure to exhaust gases and the
chemicals contained within them may cause
condensation to form on the steel cabinet and other
metal components of the outdoor unit. This will
diminish unit performance and longevity.

Summary of Contents for XC21-024

Page 1: ...RUCTIONS Dave Lennox Signature Collection SL18XC1 System AIR CONDITIONERS 507353 01 7 2018 WARNING Improper installation adjustment alteration service or maintenance can cause property damage personal...

Page 2: ...subject to damage e g being bent or scratched While handling or stowing the panels consider any weather conditions especially wind that may cause panels to be blown around and damaged CAUTION As with...

Page 3: ...e and uneven surfaces Concrete slab use two plastic anchors hole drill 1 4 COIL BASE PAN CORNER POST STABILIZING BRACKET 18 GAUGE METAL 2 WIDTH HEIGHT AS REQUIRED 10 X 1 2 LONG SELF DRILLING SHEET MET...

Page 4: ...erforming any service procedure to neutralize electrostatic charge NOTE For proper voltages select control wires gauge per table below WIRE RUN LENGTH AWG INSULATION TYPE LESS THAN 100 30 METERS 18 TE...

Page 5: ...ontinued 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 30 0 30 SECOND DELAY SEC...

Page 6: ...o stage electric heat cut factory installed metal link between W1 and W2 Then connect thermostat wire between the air handler control s W2 and the thermostat s W2 terminal 5 Cut on board link clippabl...

Page 7: ...existing traps Polyol es ter POE oils are used in Lennox units charged with HFC 410A refrigerant Residual mineral oil can act as an insulator preventing proper heat transfer It can also clog the expa...

Page 8: ...line orifice housing LOW HIGH EXISTING INDOOR UNIT GAUGE MANIFOLD CYLINDER CONTAINING CLEAN HCFC 22 TO BE USED FOR FLUSHING Positioned to deliver liquid refrigerant LIQUID LINE SERVICE VALVE INLET DIS...

Page 9: ...ort nitrogen flow will have an exit point NITROGEN HIGH LOW B A C PIPING PANEL REMOVAL PREPARING LINE SET CAP AND CORE REMOVAL Remove piping panel to access service valves Cut ends of the refrigerant...

Page 10: ...ter saturated cloths under the valve body to protect the base paint 4FLOW NITROGEN Flow regulated nitrogen at 1 to 2 psig through the refrigeration gauge set into the valve stem port connection on the...

Page 11: ...SION VALVE KIT MATCH UPS AND APPLICATION INFORMATION 1 REMOVE THE FIELD PROVIDED FITTING THAT TEMPORARILY RECON NECTED THE LIQUID LINE TO THE INDOOR UNIT S DISTRIBUTOR ASSEM BLY 2 INSTALL ONE OF THE P...

Page 12: ...linder of HFC 410A refrigerant to the center port of the manifold gauge set Open the valve on the HFC 410A cylinder vapor only B Open the high pressure side of the manifold to allow HFC 410A into the...

Page 13: ...IGH LOW NITROGEN CONNECT GAUGE SET A B C D LINE SET AND INDOOR COIL NOTE Remove cores from service valves if not already done FIGURE 16 EVACUATE LINE SET AND INDOOR COIL The unit is shipped with a fac...

Page 14: ...rigerant Open the mani fold gauge valve 1 to 2 psig in order to release the vac uum in the line set and indoor unit 9 Perform the following S Close manifold gauge valves S Shut off HFC 410A cylinder S...

Page 15: ...and clean as neces sary 4 Inspect the condition of refrigerant piping and confirm that pipes are not rubbing copper to copper Also check the condition of the insulation on the refrigerant lines Repair...

Page 16: ...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 Ra...

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