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Coil inStallation
WarninG:
this coil is pressurized with nitrogen.
avoid direct face exposure or contact with
valve when gas is escaping. always ensure
adequate ventilation is present during the
depressurization process. any uncertainties
should be addressed before proceeding.
WarninG:
Shut off all electrical power to the furnace and
outdoor condensing unit before performing any
maintenance or service on the system. Electric
furnaces may be connected to more than one
supply circuit.
CaUtion:
the coil must be level to ensure proper
condensate drainage. an unlevel installation
may result in structural damage, premature
equipment failure, or possible personal injury.
1. Disconnect all electrical power to the furnace or air
handler.
2. Remove system refrigerant per industry standard
practices.
3. Disconnect and remove existing evaporator coil.
System Depressurization
1. Remove the cap (Figure 1) from the end of the liquid
line.
2. Verify pressurization by depressing the Schrader valve
on the end of the liquid line. Listen for any escaping gas.
If there is no pressure, test the coil for leakage.
• If leakage is found, clearly mark the location of the
leak and return the coil to the distributor for processing.
• If no leaks are found, the coil may be installed.
3. Depress the valve to relieve all pressure from the coil.
4. Proceed to the appropriate lineset connection for
installations with factory installed orifice. See pages
4 - 5.
5. Go to Changing the Orifice section if your installation
is with a different orifice.
6. Go to Installing a TXV kit (page 3) if your installation is
equipped with a TXV.
2
NITROGEN
1
HEALTH
0
FLAMMABILITY
0
REACTIVITY
0 Minimal Hazard
1 Slight Hazard
Schrader
Valve
Cap
Figure 1. Suction & liquid line locations
nominal CabinEt
HEiGHt
20"
26"
30"
table 1. Horizontal Drain Kits
part
moDEl
nUmbEr
921482
REPLCOIL01M
921483
REPLCOIL02M
921484
REPLCOIL03M
921485
REPLCOIL04M
921486
REPLCOIL05M
921488
REPLCOIL07M
table 2. replacement Coil Specs
Changing the orifice
important: Before proceeding, perform steps 1 - 3 in
the System Depressurization section and confirm that the
restrictor orifice size meets the requirements outlined in
the outdoor unit installation manual. Restrictor kit (PN
917700) contains various restrictors from size .051 to
0.103. Individual restrictors are available by part number
- PN 664*** (where *** represents the size).
Example: 664103 is a restrictor 0.103 inches in diameter.
Factory supplied orifice sizes are listed in Table 2 (page
3). If the orifice must be replaced, follow steps 1 - 5.
CaUtion:
to prevent damage to the unit or internal
components, it is recommended that two
wrenches be used when loosening or tightening
nuts. Do not over tighten!
1. Using two wrenches, loosen the nut and distributor body
as shown in Figure 2. Turn the assembly nut counter-
clock-wise until the orifice body halves are separated.
2. Insert a light-gauge wire hook between the distributor
body and the restrictor orifice while being careful not
to scratch either part. Carefully remove the restrictor
orifice from the distributor body. See Figure 3.
Suction
Line
Liquid
Line
Horizontal Drain
Kit pn
920265
920266
920267
oriFiCE
WiDtH
SizE
0.067
A
0.067
B
0.080
B
C
0.093
C
0.099
C
0.093
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