Quick Start Manual
3. Remove horizontal drain pan retaining clip (1-screw).
4. Carefully remove coil assembly and bottom drain pan.
5. Move horizontal drain pan from left hand side of coil to
right side.
6. Install modied coil assembly back into unit.
7. Reinstall coil support bracket and horizontal drain pan
retaining clip.
8. Determine drain holes being used and reposition knockout
caps.
9. Reinstall doors.
E. Electric Furnace
Optional electric heating packages are available, see the unit label
for various sizes.
* See Electric Heater Kit Specications Table
F. Power Wiring
Refer to the unit’s nameplate for specic electrical data.
Use copper conductors only. Tighten all wire connectors.
Refer to unit nameplate for minimum circuit ampacity. For correct
wire size, refer to the National Electrical Code. Use 75˚C minimum
wire in unit wiring compartment.
G. Control Wiring
Field connections are made to the low voltage terminal strip.
Consult installation instructions provided with accessory items
for specic information on control wiring. Use 18 AWG minimum
copper control conductors for control wiring up to 50 feet between
units. 16 AWG control conductors are recommended for lengths up
to 100 feet. Class 2 wiring is acceptable. Do not short control leads.
Transformer burn-out will result. Set thermostat heat anticipator at
0.15 amps for air handler.
H. Blower Motor
Units are equipped with a three-speed blower motor. Two factory-
selected motor speed leads are connected to the fan relay (FR) to
provide automatic speed change for heating and cooling airow
volumes. The pre-selected motor speeds would normally not have
to be changed in the eld. All HAH models contain a post purge
timer (TDR) that delays the blower turning off at the end of the
cooling cycle, this improves energy efciency.
Terminal number 4 on the (FR) fan relay is the cooling blower
speed and terminal number 6 on the (FR) is the heating blower
speed.
I. Refrigerant Piping
All air handlers have DX refrigerant cooling coils installed, liquid
and suction piping should be sized in accordance with condensing
unit manufacturer’s recommendations. An adapter (by others) may
be required to make the transition between the line set and the
coil connector. The evaporator coil has sweat copper connections.
The suction line is a swaged solder cup connection. The liquid line
connection is made to a tail piece portion of the TXV. Remove the
nut on the inlet to the expansion valve and place it on the tail piece
prior to brazing the liquid line. DO NOT connect the tail piece
to the TXV until the liquid line has been brazed to the tail piece.
Refrigerant lines should be soldered with silver solder or other
high temperature brazing alloy. Dry nitrogen must ow through the
refrigerant lines during the brazing operation to prevent oxidation.
J. Refrigerant Flow Control
As shipped, the TXV installed on the A-coil is for the nominal
capacity of a 13 SEER matched with Heat Controller, Inc.,
condensing units. The TXV is for use on an R-410A system. For
other refrigerants, contact the factory. TXV has a built-in check
valve for reverse ow and is suitable for heat pump operation. All
are externally equalized with non-adjustable superheat and have
15% bleed. Hard start capability for outdoor units is not normally
required when a 15% bleed valve is used. The external equalizer
line attached to the TXV has a female are nut and is attached to
the suction line at the coil. Install the TXV bulb to the suction line
using the bulb clamp furnished with the kit. The bulb should be
installed on a horizontal run of the suction line if possible. On a
line less than 7/8” OD, the bulb may be installed on top of the line.
With 7/8” OD or over, the bulb should be installed in a position of
about 4 or 8 o’clock. If the bulb installation is made on a vertical
run, the bulb should be located at least 6 inches from any bend
and on the tubing side opposite the plane of the bend. On vertical
bulb installations, the bulbs should be positioned with the bulb
capillary tube at the top. The bulb must be insulated using thermal
insulation to protect it from the effects of the surrounding ambient
temperature.
CAUTION
IT IS MANDATORY TO USE AN
EMERGENCY AUXILIARY DRAIN PAN
WITH ANY COIL OR AIR HANDLER
INSTALLED IN AN ATTIC OR ABOVE A
FINISHED CEIING!
CAUTION
DISCONNECT POWER AT MAIN FUSE OR CIRCUIT
BREAKER DISTRIBUTION PANEL BEFORE WIRING
UNIT TO PREVENT SHOCK OR FIRE HAZARD.
NOTE: SEE UNIT FOR COMPLETE WIRING DIAGRAM
LOCATED ON BLOWER HOUSING.
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