October, 2003
INSTRUCTIONS
Time Delay Relay Board Replacement
model HD
6-582
5
5H
H7
78
86
67
77
7A
A
Perform the following to the unit.
1. Shut off the gas supply and electrical power to the unit.
2. Remove the Blue wires (approximately 6" long Blue wire
with a ¼" Female wire connector at each end) from the "H"
of terminals of the Time Delay Relay. Also remove the
other ends of the blue wires attached to the to Terminal
Board. One wire is attached to the Com terminal and the
other is attached to the "H" terminal. Discard of both blue
wires.
3. Remove and RETAIN the Black wiring assembly
(approximately 6" long Black wire with a ¼" Female wire
connector at each end) that connects the "3" terminal from
the time delay relay to "L1" of the transformer.
4. Remove the remaining wires from the terminal board (do
not disconnect other end of wires). Remove and discard
the 3 (three) terminal adapters (see fig 1.1).
5. Remove the sheet metal screws from the old terminal
board. Retain 2 (two) of the screws and discard of the
remaining screws as well as the old terminal board.
6. Remove the remaining wire from the time delay relay.
Remove the sheet metal screws from the time delay relay.
Discard the screws and time delay relay.
Figure 1.1
Terminal Adapter
7. Discard all paper copies of the wiring diagram 5H75034-2
supplied with the unit and replace it with wiring diagram
5H78166 supplied with kit.
8. Remove the unit wiring diagram label (5H75033-2) from
unit and replace with wiring diagram label 5H78165 from
kit.
9. Attach the new time delay board (5H78126) to the unit
using 2 of the screws retained from step 5. Note: two of
the four holes in the new board will line up with existing
holes.
10. Using the black wiring assembly retained in step 3 above,
connect "XFMRL1" to terminal "TR1" on the new Time
Delay board.
11. Connect white wire from COM transformer terminal to
terminal board terminal XFMRL2.
12. Connect black wire from 120V transformer terminal to
terminal board terminal XFMRL1.
13. Connect red wire from 24V transformer terminal to terminal
board terminal 24 VAC.
14. Connect yellow wire from 24V transformer terminal to
terminal board terminal COM.
15. Connect one black wire from motor to terminal board
terminal TR2 and the other black motor wire to XFMRL2.
16. Connect black wire from 120V supply power to terminal
board terminal XFMRL1.
17. Connect white wire from 120V supply power to terminal
board terminal XFMRL2.
18. Plug in multi-wire connector (contains 2 black, 2 red, 1
blue and 1 orange wire) to terminal board.
19. Re-connect field wired thermostat wires to R and W.
20. Confirm that the unit is wired according to wiring diagram
5H78166 supplied with the kit.
21. Switch on the gas supply and electrical power to the unit.
22. Check the unit for proper operation.
IMPORTANT
The use of this manual is specifically intended for a qualified
installation and service agency. All installation and service of
these units must be performed by a qualified installation and
service agency. Modine manuals may contain excerpts from
component supplier literature adapted for Modine products.
Any accompanying component supplier literature is for
general information.
WARNING
1. Improper installation, adjustment, alteration, service or
maintenance can cause property damage, injury or death,
and could cause exposure to substances which have
been determined by various state agencies to cause
cancer, birth defects, or other reproductive harm. Read
the installation, operating, and maintenance instructions
thoroughly before installing or servicing this equipment.
2. All units must be wired strictly in accordance with the
wiring diagram furnished with the kit. Any wiring different
from the wiring diagram could result in a hazard to
persons and property.
3. All wiring must be done with a wiring material having a
temperature rating of at lease 105°C.
THIS MANUAL IS THE PROPERTY OF THE OWNER.
PLEASE BE SURE TO LEAVE IT WITH THE OWNER WHEN YOU LEAVE THE JOB.
