RQTH INSTALLATION
Installing Into Wall Sleeve/Enclosure
DANGER
Electrical shock hazard — Verify power to existing
unit (Carrier 50QT/ET) is disconnected before
removing. Failure to do so will result in death or
serious injury.
!
CAUTION
Use portable lifting device when removing old
unit and to install new unit. Do not attempt to lift
unit without assistance. Failure to follow these
instructions could result in minor or moderate injury.
!
1.
Remove existing unit per manufacture instructions.
2.
Clean and inspect wall sleeve for corrosion, decay or
damage. Repair or replace if necessary.
3.
Remove and discard existing louvers and replace with
suitable replacement louver. Replacement louver
is necessary to achieve rated performance. See
Condenser Louver Replacement page 21 for more
information.
4.
Apply 1” x 1” open cell foam strips to prevent outside
air from entering around the chassis to room from
sides and top of cabinet. Install provided strips
between wall sleeve and cooling chassis. Verify a solid
seal between wall and chassis. Failure to do so will
result in air leakage from outdoor to indoor which may
cause system problems (example: coils freezing, short
cycling and constant operation). See Figure 8.
NOTICE
Carrier series use internal drain system. Verify
existing drain system is in working condition and
able to move condensate freely.
5.
Verify internal condensate drain on replacement unit is
free of any obstructions and free flowing. Pour at least
16 oz. clear water through base pan and evaporator
drain pan.
6.
Slide chassis into wall sleeve using lifting device.
Line up guide channels with sleeve guide channels on
bottom of wall sleeve.
7.
Slide chassis in until center partition meets wall sleeve
gasket.
8.
Attach power in accordance with requirements of
authority having jurisdiction or in absence of such
requirements refer to ANSI/NFPA 70, Canada CSA
C22.1 Canadian Electrical Code.
9.
Verify all drain connections are complete before
lagging bulkhead in final position.
10.
Lag chassis in place using 6 lag bolts removed from
removed unit or replace lag bolts if necessary.
11.
Connect existing ductwork to unit. It may be
necessary to remove and discard top panel. Secure
unit to ductwork with foil tape.
Stub for Base Pan
Condensate Drain Hose
Evaporator Condensate
Drain Hose
Figure 7 - Condensate Drain Locations
View - bottom of unit
Figure 8 - Foam Tape Installation Against Wall
Sleeves
Apply
1” X 1”
Foam Tape
View - front of unit
10
Made in USA
PN 240010236 REV. D [12/15/2018]
