Steffes HPB22 Owners Manual - Manual (Page 27)

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UNIT LOW VOLTAGE WIRING DIAGRAM FOR THE
MODEL HPB22B
(FIGURE 16)
NOTES: 1. Low voltage auxilliary control contacts.
a.
Y to Y2 contacts open when load control device closes.
b. Y to Y3 contacts closed when load control device closes.
2. Auxilliary contacts close during off-peak heat calls.
3. N.O. used for open on-peak load control device (switch closes to charge).
N.C. used for closed on-peak control device (switch opens to charge).
4. R & C terminals may be used as a source for 24 volt AC for external device control. (5VA max load.)
5. The Y terminal must be connected to compressor control circuit from the wall thermostat in all installations.
When the compressor is to be controlled with load management call in heating or cooling modes, Y2 must
be used as the compressor control signal to the outdoor unit. If controlling the compressor in the heating
mode, then the K4/C4 jumper must be removed. If controlling the compressor in the cooling mode, then the
K8/C8 jumper must be removed. (Only remove these jumpers if using the booster to control the compres-
sor.)