Make-Up Air Installation Manual

11/23/2011 6 HI309
OPERATIONAL TIPS
Comfort Level Temperature Setting
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 below.
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
A B C E H
0 90 96 20 68 88
1 100 100 25 72 90
2 110 104 30 76 92
3 120 108 35 80 94
4 130 112 40 84 96
5 140 116 45 88 98
6 150 120 50 92 100
7 160 124 55 96 102
Function
1. Electric element power is only used if the heat pump warm air temperature drops below the
above selected setting.
2. Assuming the heat pump warm air temperature is below this setting, the duct sensor sends a
signal to the internal circuit board requesting a boost in warm air temperature.
3. The built-in controller begins pulsing the electric element to add this temperature. The inside
monitor LED indicates the pulsing duration and the electric element is turned on whenever the
LED is on.
4. Except for the LED and/or clamp on amp meter monitor, there are no other indicators or
troubleshooting aids.
5. See previous section titled “Summer or Cooling Disable”.
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.
B. 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.