AAON Mini Controller, Руководство пользователя

Страница: 37 / 52

37
the emergency heating stages are de-
activated.
Modulating/SCR electric heating operates as
a single stage of auxiliary/emergency
heating. Heating elements modulate using a
supply air temperature sensor and setpoint
potentiometer to meet a specific supply air
temperature setpoint.
Modulating natural gas heating operates as a
single stage of auxiliary/emergency heating.
Supply air temperature setpoint must be set
on the MODGAS board. See WattMaster
MODGAS
Controller manual for
modulating gas heat operation.
Equipment
with Modulating Gas/SCR
Electric Heat will require an additional
supply air temperature sensor be field
installed for the modulating heating controls.
Single Zone VAV Heat Pump Heating
Operation - Supply Air Temperature Control
When the space temperature has deviated ½
of the space temperature deadband below
the heating space temperature setpoint
supply air temperature control is activated.
The variable capacity scroll compressor
modulates to maintain the heating supply air
temperature setpoint.
For heat pump units with the controller
configured for the reversing valve to be
activated during the heating mode of
operation, all reversing valves are activated
along with the variable capacity scroll
compressor.
As the space temperature achieves the
heating space temperature setpoint plus ½ of
the space temperature deadband supply air
temperature control is de-activated and heat
pump heating de-activated.
If the space temperature has deviated ½ of
the space temperature deadband below the
heating space temperature setpoint and the
outside air temperature is below the
compressor outside air temperature lockout,
if available, the first stage of emergency
heating is activated.
If the supply air temperature is decreasing
below the heating supply air temperature
setpoint for the heating stage delay amount
of time and the outside air temperature is
below
the compressor outside air
temperature lockout, if available, the second
stage of emergency heating is activated.
As the space temperature achieves the
heating space temperature setpoint plus ½ of
the space temperature deadband and the
outside air temperature remains below the
compressor outside air temperature lockout,
the emergency heating stages are de-
activated.
Modulating/SCR electric heating operates as
a single stage of auxiliary/emergency
heating. Heating elements modulate using a
supply air temperature sensor and setpoint
potentiometer to meet a specific supply air
temperature setpoint.
Modulating natural gas heating operates as a
single stage of auxiliary/emergency heating.
Supply air temperature setpoint must be set
on the MODGAS board. See WattMaster
MODGAS
Controller manual for
modulating gas heat operation.
Equipment
with Modulating Gas/SCR
Electric Heat will require an additional
supply air temperature sensor be field
installed for the modulating heating controls.
Constant Volume Supply Fan
Supply fan operation is selectable between
“Auto” and “On”. The supply fan will either
cycle with cooling/heating operation (Auto)
or operate continuously (On). The setting is
selectable for both occupied and unoccupied
modes of operation.
The supply fan will be constant speed with
any speed controller input (VFD or ECM)