18-GJ03D1-2
3
Installer’s Guide
E.REFRIGERANT PIPING
IMPORTANT: Refrigerant piping must be routed to maintain
service access to blower compartment and provide easy
removal of filter access panel and filter.
1. Refrigerant connections are made outside the cabinet.
2. Installation of refrigerant lines is covered in the installation
instructions packaged with the outdoor unit. Evacuation, leak
testing and brazing procedures are included in those instruc-
tions. Read those instructions before starting installation of
refrigerant lines.
BRAZING TO EVAPORATOR SECTION
IMPORTANT: Do NOT unseal refrigerant tubing until ready to
cut and fit refrigerant lines.
1. Remove liquid line soldered cap, if so equipped.
2. Using a tubing cutter, cut off the spun end of the suction tube
manifold. Tubing should be cut square, round and free of burrs at
the connecting end. Clean the tubing to prevent contaminants
from entering the system.
3. Run refrigerant tubing into the stub sockets of indoor unit coil.
4. Braze and evacuate according to indoor and outdoor installation
instructions.
NOTE: PAINTED AREAS OF UNIT MUST BE SHIELDED DURING
BRAZING
F.CONDENSATE DRAIN PIPING
NOTE: Make certain that the unit has been installed in a level
position to ensure proper draining.
The indoor blower is downstream of the evaporator coil which creates
a negative pressure at the condensate drain connections during
operation. The condensate drain connections in front of the indoor coil
are 3/4" NPT. The lower connection is the primary drain. See Figure 2.
Two secondary drain connections are provided for the different
orientations (See Figure 3). The lower of the two should be connected
as a backup to prevent condensate overflow by a blocked primary
drain.
For proper drainage of condensate, the following steps should be
followed:
1. The primary drain line must be trapped with a minimum of 2"
water seal as shown in Figure 4
.
Do not use preformed 3/4"
PVC running traps.
The use of Field fabricated or manufactured traps is acceptable.
A manufactured trap can allow for a float switch option to be
added. Refer to the manufacturers data and instructions for
details.
2.
The trap must be located within 4 feet of the air handler
drain outlet connection.
3. It is recommended that a clean-out tee or cross be installed in
the primary drain line for future maintenance (See Figure 4 ).
4. Do not use reducing fittings in the condensate drain lines.
5. Slope the drain lines downward a minimum of 1/4" per foot.
6. Insulate the primary drain to prevent sweating.
7.
Provide means for drainage to prevent winter freeze-up of
condensate line
.
8. Do not connect the drain line to a closed drain system.
9. Use Teflon
®
tape on the air handler drain line connections! Do
Not Use pipe joint compound or PVC/CPVC cement!
It is always recommended that an auxiliary drain pan be installed
under a horizontally installed air handler. Connect the auxiliary drain
line to a separate drain line (no trap is needed in this line) and
terminate according to local codes.
NOTE: DO NOT use a torch or flame near the plastic drain pan
coupling.
NOTE: DO NOT tighten the drain pipe excessively. Support the
condensate piping and traps outside the unit to prevent strain
on the drain coupling.
2" MIN.
2" MIN.
CAP OR PLUG
Trap must be within 4'
of air handler condensate
drain connection.
Close as possible
Figure 4. Condensate Drain
Figure 2. Flow Control Check Valve
ADAPTER
FLOW CONTROL
CHECK VALVE
(F.C.C.V.) ORIFICE
FIELD SUPPLIED
LIQUID LINE
AS INSTALLED
BODY
ACCUTRON
TM
COMPONENTS
G.ELECTRICAL — POWER WIRING
1. These Air Handlers are shipped from the factory wired for 230
volts. The units may be wired for 208 volts. Follow instructions
on unit wiring diagram located on blower door.
2. The selection of wire and fuse sizes should be made according
to the Minimum Branch Circuit Ampacity and the Maximum
Overcurrent Device listed on the unit nameplate.
3. Field wiring diagrams for electric heaters and unit accessories
are shipped with the accessory.
4. Wiring must conform to National and Local codes. Ground unit
per Local codes and following recognized safety practices and
procedures.
Grounding Required! Follow proper local and state
electrical code on requirements for grounding. Failure to
follow code could result in death or serious injury.
ELECTRICAL SHOCK HAZARD! LOCK OUT UNIT DIS-
CONNECT SWITCH IN OPEN POSITION BEFORE SERVIC-
ING UNIT. FAILURE TO FOLLOW THIS WARNING COULD
RESULT IN PROPERTY DAMAGE, PERSONAL INJURY,
OR DEATH.
▲
▲
WARNING
!
▲
▲
WARNING
!
Figure 3. Condensate Drain Locations
3/4" NPT Secondary
drain connection
3/4" NPT
Primary drain
connection
Seal weep hole
