®
Chromalox
SERVICE REFERENCE
Installation Instructions
DIVISION
SALES
4
SECTION
and
REFERENCE
PF206-1
RENEWAL PARTS IDENTIFICATION
161-305684-001
DATE
MAY, 2007
Summer Fan Switch Kit With Relay
Model HVS-02 and HVS-03
Fan Switch
Wall Plate
Mounting
3 Pole Relay
Hardware
GENERAL
IMPORTANT! This instruction bulletin does not
apply to heaters which have fan delay options. For
fan delay applications, contact Chromalox for spe-
cific wiring instructions.
ELECTRIC SHOCK HAZARD. Disconnect all power
before installing or servicing fan switch. Failure to
do so could result in personal injury or property
damage. Fan switch must be installed by a quali-
fied person in accordance with the National
Electrical Code, NFPA 70.
INSTALLATION
FIGURE 1
TRANSFORMER ON 480V HEATERS
OPTIONAL ON 277V OR LESS
HEATERS
1. The HVS-02 can be used on all 1 and 3 phase Chromalox HVH
heaters rated 480V or less, having both a transformer and an inte-
gral contactor. The HVS-02 is for heaters with 24 volt control cir-
cuits. The HVS-03 is for heaters with 120 volt control circuits.
Verify the control circuit voltage on the heater nameplate, and
there is a contactor and transformer inside the terminal box.
2. If the fan only switch kit is to be installed in the heater, the center
1/2" K.O. located at the bottom of the heater needs to be removed
using a chisel or similar tool.
1/2" Ø K.O.
(ACTUAL DIAMETER)
3. If the fan only switch is to be remotely mounted, the switch enclo-
sure, conduit and wiring is to be provided by others.
CONTACTOR
Figure 1
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WIRING (cont’d.)
OPTIONAL THERMOSTAT
1 OR 3Ø
M
BUILT-IN OR REMOTE
(WHEN THERMOSTAT IS NOT
USED THERE'S A JUMPER
BETWEEN C1 AND C2)
TERMINAL
BLOCK
X2
H2
X1
H1
T1 T2 T3
C1
C2 C3
TRANSFORMER
CONTACTOR
L2 L3
L1
CUTOUT
Diagram 1: Wiring before Fan Switch is added
FAN SWITCH,
BUILT-IN
OR REMOTE
MOUNTED
OPTIONAL THERMOSTAT
BUILT-IN OR REMOTE
(WHEN THERMOSTAT IS NOT
USED THERE'S A JUMPER
BETWEEN C1 AND C2)
1 OR 3Ø
M
11 12
10
TERMINAL
BLOCK
8
9
3
7
1
2
CONTACTOR
T1
X1
H1
X2
H2
T2
A1
A2
T3
4T2
6T3
2T1
C1
C2
C3
TRANSFORMER
1L1
5L3
3L2
L3
L2
L1
MOTOR
RELAY
CUTOUT
Diagram 2: Wiring after Fan Switch is added
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Limited Warranty:
Please refer to the Chromalox limited warranty applicable to this product at
2150 N. RULON WHITE BLVD., OGDEN, UT 84404
Phone: 1-800-368-2493
TA - U0 - EF
Litho in U.S.A.
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