51
Fig. 40 —
WSHP Open Control Board
2-POSITION HOT WATER / STEAM HEATING REHEAT
The control can operate a two position, NO or NC, hot water or
steam valve connected to a coil on the discharge side of the unit
and supplied by a boiler in order to maintain the desired heating
set point should the compressor capacity be insufficient or a com
-
pressor failure occurs. Unless the compressor fails, the valve will
only open to supplement the heat provided by the compressor if
the space temperature falls two degrees or more below the desired
heating set point. The valve will be controlled so the SAT will not
exceed the Maximum Heating SAT limit and subject to a two min
-
ute minimum OFF time to prevent excessive valve cycling.
SINGLE STAGE ELECTRIC AUXILIARY HEAT
The control can operate a single stage of electric heat connected to
a coil on the discharge side of the unit in order to maintain the de
-
sired heating set point should the compressor capacity be insuffi
-
cient or a compressor failure occurs. Unless the compressor fails,
the heat stage will only operate to supplement the heat provided by
the compressor if the space temperature falls two degrees or more
below the desired heating set point. The heat stage will be con
-
trolled so the SAT will not exceed the Maximum Heating SAT
limit and subject to a two minute minimum OFF time to prevent
excessive cycling.
Содержание AQUAZONE 50PSH
Страница 17: ...17 Fig 15 PSC Motor Single Phase Single Stage WSHP Open Control ...
Страница 20: ...20 Fig 18 Constant Torque Motor Single Phase Single Stage WSHP Open Control ...
Страница 23: ...23 Fig 21 Constant Airflow Single Phase WSHP Open ...
Страница 26: ...26 Fig 24 PSC Motor Three Phase Single Stage WSHP Open ...
Страница 29: ...29 Fig 27 Constant Torque Motor Three Phase Single Stage WSHP Open ...
Страница 32: ...32 Fig 30 Constant Airflow Motor Three Phase Single Stage WSHP Open ...
