Make-Up Air Installation Manual

11/23/2011 4 EI904
Operational Tips
Outlet Temperature Setting – Code “D”
The inside circuit board contains a screwdriver switch setting marked Ø through 9. This is usable only for Ø
through 7. Unless otherwise specified during the time of order, this unit is equipped with a default “D” chip.
This is a broad range temperature with settings at 12° steps. If you would like a more precise temperature
setting, the “plug-in chip” can be changed for a temperature range selection. Order a specific temperature
range chip code as shown on the next page.
Ø = 40° 4 = 88°
1 = 52° 5 = 100°
2 = 64° 6 = 112°
3 = 76° 7 = 124°
Other Available (Special Order) Temperature Range Chips are as follows:
Switch Position B C E H
0 96 20 68 88
1 100 25 72 90
2 104 30 76 92
3 108 35 80 94
4 112 40 84 96
5 116 45 88 98
6 120 50 92 100
7 124 55 96 102
Sequence (3 or 5KW)
A. Electric element is on for 20 seconds at the start of each “Y” start call.
B. Electric element turns off if the temperature is above warm air selected point.
C. If the temperature drops, the electric element modulates to bring it back to the desired temperature
level.
D. If the electric element is fully on (LED constant), this unit cannot make up the air temperature
required between heat pump output and comfort level temperature setting.
Sequence (10KW)
A - D. Same as above.
E. If element #1 is on for 10 min. (LED constant), element #2 turns on.
Checkout and Calibration
There is no field calibration or adjustments.
Total element turn on can be accomplished by jumpering system “R” (24 volts) to “W” internal terminal. In
essence, this bypasses the temperature modulation function and causes the element to be full on.
However, see previous section “Summer or Cooling Disable”.