Installation and Service Manual
2
Transformer to Mounting Bracket
Installation
1) Review Table 2.1 to identify if the transformer accessory
requires a factory supplied bracket to mount the
transformer to the unit heater (on some models, the
transformer mounts directly to the heater without the use
of an extra bracket). If a bracket is not required, skip to the
section titled, “Mounting the Transformer Accessory to
the Unit Heater”.
Table 2.1
Transformer Accessory Mounting Method
2) Mount the Transformer to the mounting bracket using the
¼”-20 cap screws and ¼” nuts provided. Cap screws must
be inserted from the back of the mounting bracket and into
the transformer mounting holes as shown in Figure 1.1.
Figure 1.1
Transformer to Mounting Bracket Installation
Mounting the Transformer Accessory to the
Unit Heater
For HSB/HC, WTC/WSC Models Bracket Mount:
1) Mount the transformer/mounting bracket assembly on the
left side of the unit heater (as viewed from the front, air
blowing toward you) by slipping the bracket over the unit-
mounting rod. Tighten the unit mounting rod jam nut onto
the transformer mounting bracket (see Figure 2.1).
2) Insert the foam pad between the bottom of the mounting
bracket and the unit heater side panel as shown in Figure
2.1. Use two #10-24x½” self-drilling screws to fasten the
transformer mounting bracket to the unit heater side panel,
using the side panel screw locating dimples.
Figure 2.1
HSB/HC, WTC/WSC Model Bracket Mounted
Transformer
For HSB/HC, WTC/WSC Models Direct Mount:
1) Insert the foam pad between the integral top transformer
mounting bracket and the unit heater side panel as shown
in Figure 2.2. Use two #10-24x½” self-drilling screws to
fasten the transformer to the unit heater side panel, using
the side panel screw locating dimples.
2) Insert the foam pad between the back of the transformer j-
box and the unit heater side panel as shown in Figure 2.2.
From within the transformer j-box, use one #10-24x½” self-
drilling screw to fasten the transformer to the unit heater
side panel, using the side panel screw locating dimples.
Figure 2.2
HSB/HC, WTC/WSC Model Direct Mounted
Transformer
For V/VN, PT/PTN, WVC/WVN, WPC/WPN Models
Bracket Mount:
1) The transformer/mounting bracket assembly is mounted on
the top of the casing for V/VN,WVC/WVN models and the
back of the casing for PT/PTN, WPC/WPN models. The
top for V/VN,WVC/WVN and back for PT/PTN, WPC/WPN
is identified as the casing side opposite the side of leaving
airflow with the fan guard.
2) Insert one foam pad between the bottom of the mounting
bracket and the unit heater casing panel as shown in
Figure 3.1. Insert the remaining foam pad between the
mounting foot of the bracket and the unit heater casing
panel, as indicated in Figure 3.1(but not shown). On
PT/PTN, WPC/WPN units, use two 5/16” nuts with lock
washers to fasten the transformer mounting bracket to the
existing threaded studs on the unit heater. See Figure 3.2.
3) On V/VN,WVC/WVN units, use three #10-24x½” self-
drilling screws to fasten the transformer bracket to the
unit heater casing panel. See Figure 3.1. On PT/PTN,
WPC/WPN units, use two #10-24x½” self-drilling screws
to fasten the transformer bracket to the unit heater casing.
See Figure 3.2.
Supply Voltage
200V/60Hz/ 230/460V/ 575V/60Hz/
1 or 3 phase 60Hz/3 phase 3 phase
Item Item Item
Model Size Code Code Code
HSB/HC 18-63 48094 0.50 48099 Direct 48108 Direct
HSB/HC 86-121 48100 Bracket 48109 Bracket
HSB/HC 165-193 48095 1.00 48101 0.75 48110 0.75
HSB/HC 258-340 48102 1.00 48111 1.00
V/VN 42-59 48096 0.50 48103 Direct 48112 Direct
V/VN 78-139 48104 Bracket 48113 Bracket
V/VN 161-212 48097 1.00 48105 0.75 48114 0.75
V/VN 247-333 48106 1.00 48115 1.00
PT/PTN 279-333 48098 Bracket 48107 Bracket 48116 Bracket
HSB/HC,
WTC/
WSC
48094 Bracket
48095 Bracket
48096 Bracket
48097 Direct
Mount
Mount Mount
Bracket
Direct
Direct
Bracket
TRANSFORMER
NUT
WASHER
BOLT
FOAM PAD
BOLT
FOAM PAD
TRANSFORMER
MOUNTING
BRACKET
NUT
FOAM
PAD
NUT AND
WASHER
(2) SELF-
DRILLING
SCREWS
FOAM
PAD
(2) SELF-DRILLING
SCREWS
(1) SELF-DRILLING
SCREW
(NOT PICTURED)
1-556.2
V/VN,
WVC/
WVN
PT/PTN,
WPC/WPN