Steffes HPB22 Owners Manual - Manual (Page 31)

- Page 28 -
INSTALLATION NOTES
(See Figures 17, 18, and 19)
NOTE 1:
The letters in the heat pump thermostat may vary, but the function of the wires are normally the same. (See Terminal
Designation on Heat Pump Devices for Various Manufacturers in the Appendix.)
NOTE 2:
This R MUST be connected to the transformer hot leg in the wall thermostat. Reversing the R&C terminals will cause
improper operation.
NOTE 3:
The Y terminal must be connected to compressor control circuit from the wall thermostat in all installations. When
compressor is to be controlled with a load management call in heating or cooling modes, Y2 must be used as the com-
pressor control signal to the outdoor unit. If controlling the compressor in heating mode, the K4/C4 jumper must be
removed. If controlling the compressor in cooling mode, K8/C8 jumper must be removed. (Only remove these jumpers
if using the booster to control the compressor.)
NOTE 4:
The O terminal MUST be hooked up to the thermostat side of the reversing valve signal wire, and 02 MUST be hooked
up to the compressor side of the reversing valve signal wire. Failure to do so will result in improper operation of the
heat pump and/or booster.
NOTE 5:
The duct sensor is installed a minimum of three (3) feet down stream from the booster inlet and outlet ports. This
sensor regulates the heat pump booster output to insure a comfortable cozy air supply.
NOTE 6:
The outdoor temperature sensor regulates the amount of heat stored in the booster. The preferred position of this
sensor is on the north side of the structure, eight (8) feet above the ground, away from the external heat sources, and
out of hot, direct sunlight.
NOTE 7:
These connections can be used to control the water heater or in other appliances. Y is common. Y2 and Y3 are
normally open and normally closed and are activated by the load management controller on-peak and off peak. The
auxiliary connections are normally open contacts that will close with a room thermostat heat call during off -peak
hours.
NOTE 8 :
W&G terminals are NOT USED. 24 VAC can be tapped from the R&C terminal block positions for control of
external devices, but this load must not exceed 15VA at 24 VAC.
CAUTION: All circuit board terminals and contacts are for use with Class II
circuits only. Do not connect line voltage.