SERVICE REFERENCE
Installation Instructions
DIVISION
SALES
4
SECTION LUH/KUH
and
REFERENCE
PF481-3
(Supersedes PF481-2)
RENEWAL PARTS IDENTIFICATION
161-303477-002
DATE
NOVEMBER, 2008
Summer Fan Switch Kit With Relay
Model Number
ESFS-40
ESFS-40A
ESFS-41
ESFS-41A
ESFS-42
ESFS-42A
ESFS-47
Summer Fan Switch
w/ Relay
GENERAL
The fan switch and relay kit is used for all 480 Volt LUH/KUH
heaters, when summer fan only operation is required. See Model
Number versus Kit Model Number on page 3. This kit can also be
used where low voltage control wiring is specified.
WARNING: Hazard of Electric Shock. This kit must
be installed by a qualified electrician. Before per-
forming any of the following operations, disconnect
all power to the heater to prevent possible fatal
injury.
INSTALLATION
The kit comes complete with all necessary wiring and mount-
ing screws. A wall box plate is included for remote mounting of
the selector switch and can be discarded if the switch is to be
mounted on the heater.
To install on the heater, open the wiring access door located
on the bottom of the heater by turning the captive latching screw
90 degrees in either direction (Figure 1). The selector switch is to
be mounted using the knockout hole on the front of the heater,
located right above the Chromalox or Heatflo label (Figure 2).
The switch has all of the wiring connected to the correct terminals
with the three leads to be wired to other components marked by
their respective terminal number, these are wire numbers 2, 8 and
11. (Figure 3, Figure 3A) Before installing the switch, check all
the wiring connections to be sure none have become loose during
shipping and handling.
Captive
Latching
Screw
Summer Fan
Switch
Knockout Hole
Figure 1
Figure 2
Selector Switch
Selector Switch
Mounting
Hardware
Mounting
Hardware
2 Pole Relay
Wall Plate
3 Pole Relay
Wall Plate
Figure 3
Figure 3A
© 2010 Chromalox®, Inc.
ESFS Kit Model Number vs. Applicable Heater Model Number
MODEL
Kit No.
MODEL
Kit No.
MODEL
Kit No.
MODEL
Kit No.
LUH-D-02-81-34-00 ESFS-42
LUH-D-02-21-34-00 ESFS-42
LUH-D-02-71-35-00 ESFS-47
LUH-D-10-81-34-00 ESFS-42
LUH-D-10-83-34-00 ESFS-42
LUH-D-10-21-34-00 ESFS-42
LUH-D-10-23-34-00 ESFS-42
LUH-D-10-43-32-00 ESFS-41A
KUH-C-02-81-00
KUH-C-02-21-00
KUH-C-02-71-00
ESFS-42
ESFS-42
ESFS-47
KUH-C-10-81-34
KUH-C-10-83-34
KUH-C-10-21-34
KUH-C-10-23-34
KUH-C-10-43-30
ESFS-42
ESFS-42
ESFS-42
ESFS-42
ESFS-40A
LUH-D-04-81-34-00 ESFS-42
LUH-D-04-83-34-00 ESFS-42
LUH-D-04-21-34-00 ESFS-42
LUH-D-04-23-34-00 ESFS-42
LUH-D-04-71-35-00 ESFS-47
LUH-D-04-43-32-00 ESFS-41
KUH-C-04-81-00
KUH-C-04-83-34
KUH-C-04-21-00
KUH-C-04-23-34
KUH-C-04-71-00
KUH-C-04-43-30
ESFS-42
ESFS-42
ESFS-42
ESFS-42
ESFS-47
ESFS-40
LUH-D-12-83-34-00 ESFS-42
LUH-D-12-23-34-00 ESFS-42
LUH-D-12-43-32-00 ESFS-41A
KUH-C-12-83-34
KUH-C-12-23-34
KUH-C-12-43-30
ESFS-42
ESFS-42
ESFS-40A
LUH-D-15-83-34-00 ESFS-42
LUH-D-15-23-34-00 ESFS-42
LUH-D-15-43-32-00 ESFS-41A
KUH-C-15-83-34
KUH-C-15-23-34
KUH-C-15-43-30
ESFS-42
ESFS-42
ESFS-40A
LUH-D-05-81-34-00 ESFS-42
LUH-D-05-83-34-00 ESFS-42
LUH-D-05-21-34-00 ESFS-42
LUH-D-05-23-34-00 ESFS-42
LUH-D-05-71-35-00 ESFS-47
LUH-D-05-43-32-00 ESFS-41
KUH-C-05-81-00
KUH-C-05-83-34
KUH-C-05-21-00
KUH-C-05-23-34
KUH-C-05-71-00
KUH-C-05-43-30
ESFS-42
ESFS-42
ESFS-42
ESFS-42
ESFS-47
ESFS-40
LUH-D-20-23-34-00 ESFS-42A
LUH-D-20-43-32-00 ESFS-41A
KUH-C-20-23-34
KUH-C-20-43-30
ESFS-42A
ESFS-40A
LUH-D-25-43-32-00 ESFS-41A
KUH-C-25-43-30
ESFS-40A
LUH-D-07-81-34-00 ESFS-42
LUH-D-07-83-34-00 ESFS-42
LUH-D-07-21-34-00 ESFS-42
LUH-D-07-23-34-00 ESFS-42
LUH-D-07-71-35-00 ESFS-47
LUH-D-07-43-32-00 ESFS-41A
KUH-C-07-81-34
KUH-C-07-83-34
KUH-C-07-21-34
KUH-C-07-23-34
KUH-C-07-71-30
KUH-C-07-43-30
ESFS-42
ESFS-42
ESFS-42
ESFS-42
ESFS-47
ESFS-40A
LUH-D-30-83-34-00 ESFS-42A
LUH-D-30-23-34-00 ESFS-42A
LUH-D-30-43-32-00 ESFS-41A
KUH-C-30-83-34
KUH-C-30-23-34
KUH-C-30-43-30
ESFS-42A
ESFS-42A
ESFS-40A
LUH-D-35-23-34-00 ESFS-42A
LUH-D-35-43-32-00 ESFS-41A
KUH-C-35-23-34
KUH-C-35-43-30
ESFS-42A
ESFS-40A
LUH-D-40-23-34-00 ESFS-42A
LUH-D-40-43-32-00 ESFS-41A
KUH-C-40-23-34
KUH-C-40-43-30
ESFS-42A
ESFS-40A
LUH-D-45-43-32-00 ESFS-41A
KUH-C-45-43-30
ESFS-40A
REPLACEMENT PARTS
PCN
Kit Model No.
Description
Relay P/N
305015
305058
305023
305066
305031
305074
305040
ESFS-40
ESFS-40A
ESFS-41
ESFS-41A
ESFS-42
ESFS-42A
ESFS-47
Fan switch & relay 24 Volt control 2 pole relay 2-15 kW
Fan switch & relay 24 Volt control 3 pole relay 20-45 kW
Fan switch & relay 120 Volt control 2 pole relay 2-15 kW
Fan switch & relay 120 Volt control 3 pole relay 20-45 kW
Fan switch & relay 240 Volt control 2 pole relay 2-15 kW
Fan switch & relay 240 Volt control 3 pole relay 20-45 kW
Fan switch & relay 277 Volt control 2 pole relay 2-15 kW
072-306110-003
072-306110-001
072-306110-011
072-306110-007
072-306110-016
072-306110-013
072-306110-021
Fan Switch for all Kits P/N 292-057673-001
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
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