# 41718L098
Page 3
Refrigerant Piping Connections
Check the indoor piston orifice to see if it matches the
required piston for the indoor and outdoor combina-
tion being installed. Refer to the refrigerant charge
label located on the inside of the outdoor unit access
panel for the correct piston orifice size requirements.
Replace the piston orifice with the correct size if this
size is not already installed in the indoor coil.
For optimum system performance, indoor coils
should be washed with a suitable detergent to remove
any residue from the coil manufacturing processes.
Refer to the following instructions when making the
refrigerant piping connections:
1.
The unit has been factory charged with refrigerant
(R22) suitable for a matched indoor coil and 20 feet of
properly sized refrigerant tubing. Refer to the unit
rating plate for the exact amount of this factory charge.
2.
Refer to the refrigerant charge label located on the
inside surface of the outdoor unit access panel.
Locate the outdoor and indoor models being installed
and note any refrigerant adjustments that must be
made to the system. Adjustments to the system
charge must also be made if an interconnecting line
set other than 20 feet is installed.
WEATHERPROOF
DISCONNECT
SWITCH
Minimum Clearances
Figure 1
48" OVERHEAD
CLEARANCE
NAMEPLATE
LOCATION
NEC CLASS 1
WIRING
THERMOSTAT
NEC CLASS 2
WIRING
12" CLEARANCE
12" CLEARANCE
BOTH SIDES
24" SERVICE
ACCESS CLEARANCE
SEAL OPENING(S)
WITH PERMAGUM
OR EQUIVALENT
NOTE: ALL OUTDOOR WIRING
MUST BE WEATHERPROOF
TO
INDOOR
UNIT
TO
EVAPORATOR
COIL
TO
POWER
SUPPLY
3.
Route tubing to fittings on the outdoor unit vapor and
liquid service valves using properly sized refrigerant
grade tubing. Run the refrigerant tubing in as direct a
path as possible avoiding unnecessary turns and
bends.
4.
Ensure that the vapor line is insulated properly and
that both vapor and liquid lines are not in direct
contact with floors, walls, ductwork, floor joists or
other piping.
5.
After wrapping the service valves with a wet rag,
braze the tubing to the valve connections.
6.
After brazing the tubing connections at the indoor coil,
leak test the refrigerant tubing and indoor coil.
7.
Following the leak test, evacuate the indoor coil and
line set to a minimum of 500 microns to remove
contamination and moisture.
8.
After evacuation, open both the vapor and liquid
service valves fully.
