AWST Installation Manual
3
5.3 Interconnecting Tubing:
Give special consideration to minimize the length of refrig-
erant tubing when installing air handlers. Refer to Remote
Cooling/ Heat Pump Service Manual RS6200006, and TP-
107 Long Line Set Application R-410A for tubing guidelines.
If possible, allow adequate length of tubing such that the
coil may be removed (for inspection or cleaning services)
from the cabinet without disconnecting the tubing.
Note: These air handlers are designed for indoor installa-
tion only at a max altitude of 10,500 feet above sea level or
a min altitude of -184 feet below sea level.
6 Application Information
The unit is designed to be installed in conditioned space,
either recessed into a wall or hanging in a vertical
“upow” position. If units are recessed in a wall, use
the holes along the inside of the front ange to attach
units to the framing studs. The vertical air handler comes
equipped with an oset hanging bracket attached to the
rear of the cabinet for hanging applications.
IMPORTANT: Unit must be installed level or slightly tilted
back to ensure proper drainage of condensate.
The air handler also has a bottom and front return. Large
chassis installations should be installed as front return
only. If the small chassis air handler is to be installed in
a bottom return application, discard the drain access
panel in the bottom of the unit. If the air handler is to be
installed in a front return application, remove and discard
the front access panel with insulation. The unit is shipped
with a lter rack and lter. Remember to inspect, clean
and/or replace the lter monthly.
Units are equipped with both a bottom primary and second-
ary drain. Both drains must be trapped, unless emergency
condensate switch is install in the secondary drain. Failure
to install a trap could result in condensation overowing
the drain pan resulting in substantial water damage to the
nearby area.
The connectors required are 3/4” NPT male, either PVC or
metal pipe, CPVC piping is not approved, and should be
hand tightened to a torque of no more than 37 in-lbs. to
prevent damage to the drain pan connection.
To prevent potential sweating and dripping on to nished
space, it may be necessary to insulate the condensate
drain line located inside the building. Use Armaex® or
similar material.
stud.
Electrical Supply Wire and MOP
This unit is designed for single-phase electrical supply.
DO NOT OPERATE ON A THREE-PHASE POWER
SUPPLY.
Measure the power supply to the unit. The supply volt- age
must be in agreement with the unit nameplate power
requirements and within the range shown in Table 1.
Table1
6.1 Wire Sizing
Wire size is important to the operation of your equipment.
Use the following check list when selecting the appropriate
wire size for your unit.
• Wire size must carry the Minimum Circuit
Ampacity (MCA).
• Wire size allows for no more than a 2% voltage
drop from the building breaker/fuse panel to the
unit.
Refer to the latest edition of the National Electric Code or in
Canada the Canadian Electric Code when determining the
correct wire size. Table 2 shows the current carrying
capabilities for copper conductors rated at 75° C with a 2%
voltage drop. Use Table 2 to determine the per foot of
various conductors.
Nominal Input Minimum Voltage Maximum Voltage
208/230 187 253
TO AVOID THE RISK OF FIRE OR EQUIPMENT
SOURCES MAYBE PRESENT. THE ELECTRICAL
POWER TO THIS UNIT MUST BE IN THE OFF
POSITION AND ALL POWER SUPPLIES DIS-
CONNECTED.
FAILURE TO DO SO MAY CAUSE PROPERTY
PERSONAL INJURY IF AN ELECTRICAL FAULT SHOULD OC-
AN APPROPRIATELY SIZED ELECTRICAL WIRE CONNECT-
-
-
-
DANCE WITH THE CANADIAN ELECTRIC CODE CSA C22.1.
ELECTRICAL SHOCK THAT CAN CAUSE PERSONAL INJURY
OR DEATH.