Lennox 13U57 User manual

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INSTALLATION INSTRUCTIONS FOR LIQUID CHARGE COMPENSATOR KIT (13U57; 614407-01
USED ON LGH/LCH 036, 048, 060, 072, 074 ROOFTOP UNITS
Litho U.S.A.
507559-01
7/2015
Supersedes 6/2015
2015
LIQUID CHARGE
COMPENSATOR KIT
PACKAGED UNITS KITS
AND ACCESSORIES
Shipping and Packing List
Package 1 of 1 contains:
1- Liquid charge compensator
1- Copper tube 1/4”
1- Copper tube 3/8”
1- Template
2- Straps
1- Grommet (used on 036 & 048 units only)
4- Screws
Application
The liquid charge compensator kit is used to maintain
system pressures when compressors start after long
extended periods without a cooling demand.
CAUTION
Danger of sharp metallic edges. Can cause injury.
Take care and wear protective clothing when
servicing unit to avoid accidental contact with
sharp edges.
Installation
1- Disconnect all power to unit.
2- Use an approved method of recovery to remove
refrigerant from the system.
IMPORTANT
The Clean Air Act of 1990 bans the intentional vent
ing of refrigerant (CFC's and HCFC's) as of July 1,
1992. Approved methods of recovery, recycling or
reclaiming must be followed. Fines and/or incar
ceration may be levied for non-compliance.
3- Remove the compressor access panel, corner
mullion, fan guard and fan blades.
4- Unbraze and cut the liquid line as shown in figure 1.
WARNING
Improper installation, adjustment, alteration, ser
vice or maintenance can cause property damage,
personal injury or loss of life. Installation and ser
vice must be performed by a licensed professional
HVAC installer or equivalent, service agency, or the
gas supplier
REMOVE SECTION OF LIQUID LINE
FIGURE 1
13-1/4”
CUT THE
LIQUID LINE
UNBRAZE
THE LIQUID
LINE
COMPRESSOR
SUCTION LINE
DISCHARGE
LINE

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5- 036 & 048 Unit Only -
Cut a ½” hole in the panel as shown in figure 2. Install
the grommet provided.
CUT HOLE IN PANEL
(036 & 048 UNITS ONLY)
FIGURE 2
VIEW A
16-1/2”
1-3/4”
CUT ½”
HOLE
CUT A ½” HOLE
APPROXIMATELY
HERE (SEE VIEW A)
VIEW B

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6- Units Built Before January 2015 Only -
Locate the serial number on the unit nameplate. If the
unit was built before January of 2015, remove 4” from
the vertical run of the liquid line. See figure 3.
Month Dec.
(Jan.=A; Feb.=B; Mar.=C, etc.)
5 6 1 4 L * * * * *
Year 2014
Serial Number Example
7- Fit the shortened liquid line back in place but do NOT
braze into place.
REMOVE 4” FROM LIQUID LINE
(UNITS BUILT BEFORE JANUARY 2015 ONLY)
FIGURE 3
UNBRAZE
THE LIQUID
LINE
4”
CUT
LIQUID
LINE
BEFORE AFTER
INSERT
SHORTENED
LIQUID LINE
1
2
3
REMOVED IN
PREVIOUS
STEP
REMOVED IN
PREVIOUS
STEP

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8- Fit the ⅜” tubing, provided in this kit, into place as
shown in figure 4. Make sure the hole in the tubing is
oriented to the right. Do NOT braze plumbing into
place.
INSTALL KIT LIQUID LINE
FIGURE 4
⅜”
COPPER
TUBE
ORIENT HOLE IN
TUBING TO THE
RIGHT
9- Insert the template through the fan orifice and onto
the back side of the control area. See figure 5. Mark
the four screw holes.
10- Use the provided straps to secure the compensator
in place. See figure 6.
BACK SIDE OF COMPRESSOR/CONTROLS SECTION
FIGURE 5
TEMPLATE
POSITION TEM
PLATE AGAINST
UNIT TOP
MARK FOUR
SCREW HOLES
POSITION
TEMPLATE
AGAINST
SIDE

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INSTALL COMPENSATOR AND ¼“ TUBING
FIGURE 6
ROUTE ¼” TUBING
THROUGH RECTANGULAR
OPENING OR ½” HOLE CUT
PREVIOUSLY
SECURE COMPENSATOR
TO PANEL WITH STRAPS
AND TWO SCREWS ON
EACH SIDE STRAPS