Steffes HPB22 Owners Manual User Manual
Page 9
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E. HPB CORE CHARGING CONTROL STRATEGY
(TABLE 4)
STAGE 2 HEAT CALL
MODE
STAGE 1 HEAT CALL
(EMERGENCY HEAT)
AIR CONDITIONING CALL
On-peak without
No core charging.
No core charging unless
No provision for
compressor control
override activated, then
core charging.
(above 45
o
F outdoor
Level 1 core charge.
air temperature)
Off-peak without
No core charging.
Core heating elements
No provision for
compressor control
activated to provide
core charging.
(above 45
o
F outdoor
Level 1 charge.
air temperature)
On-peak without
Core heating elements
Core heating elements
No provision for
compressor control
energized to provide
energized to provide
core charging.
(above 45
o
F outdoor
Level 1 charge only if
Level 1 charge only if
air temperature)
override activated.
override activated.
Off-peak with
Core heating elements
Core heating elements
No provision for
compressor control
energized to provide
energized to provide
core charging.
(above 45
o
F outdoor
Level 1 charge.
Level 1 charge.
air temperature)
On-peak (any out-
Core heating elements energized to provide Level 1
door air temper-
charge, with or without heat call; but, only if on-peak
ature below 45
o
F)
override activated. Charge input of the HPB11 and HPB15
is limited to 7.3 kW. Charge input of the HPB22 is
limited to 10.9 kW.
Off-peak (outdoor
Core heating elements energized to provide Level 1 charge,
air temperature of
with or withour heat call.
45
o
F)
Off-peak (outdoor
Core heating elements energized to provide Level 2
air temperature
core charge, with or without heat call. All core heating
of 35
o
F)
elements energized.
Off-peak (outdoor
Core heating elements energized to provide Level 3
air temperature
core charge, with or without heat call. All core heating
of 25
o
F)
elements energized.