Grain Systems PNEG-583 - Manual (Page 20)

20
SEREIS ONE HEATER
FOR UNITS USING
HF-7318 CONTROL BOARD
Second heater control is available with the HF-7318 heater
control board. For standard units no extra parts are re-
quired. For HI-LO units (1) TD-100282 relay must be
installed. INSTALLATION SHOULD BE MADE BY
A QUALIFIED ELECTRICIAN. When points are called
out in instructions they are in reference to points on draw-
ing below text.
INSTALLATION FOR STANDARD UNITS
1. Run (2) wires from main heater (heater that thermo
stat is connected to) to second heater.
2. Connect 2 wires to terminals 23 and 24 (points B and
A) of second heater control terminal strip in main
heater.
INSTALLATION FOR
HI-LO UNITS
1. Plug (1) TD-100282 relay into empty socket on HF-
7100 control board in main heater.
2. Run (4) wires from main heater (heater that thermo
stat is connected to) to second heater.
3. Connect 2 of the wires to terminal 23 and 24 (points
B and A) of second heater control terminal strip in
main heater.
Figure 4: The HF-7318 control board.
3. Connect other end of these wires to terminals 14 and
15 (points F and E) on lower left hand corner of HF-
7318 board in second heater.
4. Connect other end of these wires to terminals 14 and
15 (points F and E) on lower left hand corner of HF-
7318 board in second heater.
5. Connect other 2 wires to terminal 21 and 22 (points
D and C) of second heater control terminal strip in
main heater.
6. Connect other end of these wires to terminals 12 and
13 (points H and G) on lower left hand corner of HF-
7318 board in second heater.
SECOND HEATER INSTALLATION