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Fan And Heater
2ND HEATER INSTALLATION
For Units using HF-7100 Control Board
2nd Heater Control is Available with the HF-7100 heater control board. For Standard units (1) TD-
100282 Relay must be installed. For HI-LO units (2) TD-100282 Relay and (1) TD-100283 Relay
base must be installed. INSTALLATION SHOULD BE MADE BY A QUALIFIED ELECTRI-
CIAN. When points are called out in instructions they are in reference to points on drawing below
text.
Installation (Standard Units)
1. Plug (1) TD-100282 Relay into empty
socket on HF-7100 Control Board in Main
Heater.
2. Run (2) wires from main heater (heater that
thermostat is connected to) to 2nd heater.
3. Connect 2 wires to terminals 1 and 2 (Points
C and D) of 2nd heater control terminal strip
in Main heater.
4. Connect other end of these wires to termi-
nals 4 and 5 (Points F and E) on lower left
hand corner of HF-7100 board in 2nd heater.
Installation (HI-LO Units)
1. Plug (1) TD-100282 Relay into empty
socket on HF-7100 Control board in Main
heater.
2. Install TD-100283 Relay base in main
heater.
3. Run 1 wire from CYCLE (Point A ) to
terminal 13 on Relay Base. Run 1 wire from
COMM (Point B) to terminal 14 on relay
base.
4. Run (4) wires from Main Heater (Heater
that thermostat is connected to) to 2nd
Heater.
5. Connect 2 of the wires to terminals 9 and
5 of TD-100283 Relay base in main heater.
6. Connect other end of
these wires to terminals 2 and 3
(Points G and H) on lower left
hand corner of HF-7100 board
in 2nd heater.
7. Connect other 2 wires to
terminals 1 and 2 (Points D and
C) of 2nd heater control termi
nal strip in Main heater.
8. Connect other end of these
wires to terminals 4 and 5
(Points E and F) on lower left
hand corner of HF-7100 board
in 2nd heater.
9. Install TD-100282 Relay into
TD-100283 Relay base in main
heater.
B
C
D
A
E
FGH