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Installer's Guide
If an electric heater is not installed, connections are made through the
7/8" knockout on the outside of the air handler, into the air handler to
the two power leads and ground wire connections which are located
near the discharge of the blower.
NOTE: If air handler is used with or without a heater, the 7/8"
electrical entry hole as well as any other cabinet penetrations
must be sealed air tight.
IF AIRHANDLER IS USED
SUPPLEMENTARY HEATER, A PLATE IS REQUIRED TO COVER
THE OPEN HOLE IN THE AIR FLOW SYSTEM
1"
4"
ACCESSORY BAY99X123
3/8"
Figure 5. Heater Plate - Order Accessory BAY99X123 or field
fabricate to these dimensions
H.CONTROL WIRING
1. Connect wiring between indoor unit, outdoor unit and thermostat.
The use of color-coded low-voltage wires is recommended.
2. Field wiring diagrams are provided which show the low voltage
wiring hookup for a single speed cooling only system (with
supplementary heaters) and a heat pump system (with supple-
mentary heaters). Plug in type electrical connectors are provided
for use with supplementary heaters.
IMPORTANT: When supplementary heaters are installed, inspect
to insure that all packaging material has been removed.
NOTE: Direct drive motors have bearings which are permanently
lubricated and under normal use lubrication is not
recommended.
TWG AIR HANDLERS WITH SINGLE STAGE COOLING, 1 STAGE
4
WITHOUT
A FACTORY FURNISHED
17"
1/4" HOLES (4)
HEAT
WHEN FIELD-INSTALLED HEATERS ARE
USED, DISCARD POWER LEADS WITH
POLARIZED PLUG 1-PM AND CONNECT
1-PF TO MATING PLUG IN THE HEATER
CONTROL BOX AS SHOWN.
From Dwg. No. B801083
PRESSURE DROP FOR ELECTRIC HEATERS IN AIR HANDLER
HEATER RACKS
HEATER
MODEL NO.
BAYHTR1405
BAYHTR1408
BAYHTR1410
BAYHTR3410
BAYHTR1415
BAYHTR3415
6"
TWG AIR HANDLERS WITH SINGLE SPEED HEAT PUMP
TWG AIR HANDLERS WITH SINGLE STAGE COOLING AND
WHEN FIELD-INSTALLED HEATERS ARE
USED, DISCARD POWER LEADS WITH
POLARIZED PLUG 1-PM AND CONNECT
1-PF TO MATING PLUG IN THE HEATER
CONTROL BOX AS SHOWN.
MODELS
Strip heater pressure
NO. OF
drop measurements
RACKS
listed in this table must
be added to system
1
static pressure to
correctly use the corre-
2
sponding air flow
(blower) performance
2
tables located on page 5.
3
WHEN FIELD-INSTALLED HEATERS ARE
USED, DISCARD POWER LEADS WITH
POLARIZED PLUG 1-PM AND CONNECT
1-PF TO MATING PLUG IN THE HEATER
CONTROL BOX AS SHOWN.
From Dwg. No. B801082
TWO STAGE HEATING
From Dwg. No. B801081
18-GJ03D1-2
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