Greenheck PGD1000W00, Справочное руководство

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Microprocessor Controller for MUA 15
®
c
hangeoVer
s
eTTings
When manual mode is disabled, the controller will switch between summer and
winter modes based on the space temperature. When the temperature falls below
the setpoint, the unit will be in winter mode. When the temperature rises above the
setpoint plus the hysteresis, the unit will be in summer mode.
Control Variables
Heat & Vent
The Heat & Vent Mode menu is only available when the unit is configured for the
heating and ventilating sequence and allows adjustments of the heat and vent mode
changeover settings, and allows configuration of the summer and winter modes.
m
ode
o
Verride
The heat and vent mode menus will be active when the unit is configured for the
heating and ventilating sequence. By default the unit will changeover between
summer and winter mode based upon the room temperature. Enabling manual
mode will allow the user to change between summer and winter mode on this
menu.
Menu
c
ompressor
c
onTrol
Consult factory prior to adjusting parameters in the compressor control menu.
Control Variables
Refrigeration
Compressor Control
Control Variables
Evap Cooling
The
Evap Cooling
menu allows the user to adjust the evaporative cooling auto
fill and drain settings. If equipped with evaporative cooling.
s
ump
F
ill
This screen allows adjustment of the delay time between when the evaporative
cooling valves are energized and the evaporative cooling pump is enabled. This
provided time for the sump to fill partially before energizing the sump.
a
uTo
d
rain
F
lush
This screen allows auto drain and flush to be enabled/disabled. When enabled
the elapsed timer begins when the sump is filled. When the elapsed time reaches
the delay setting, the sump will be drained and the pump will be disabled. The
duration setting sets how long the sump is drained. This sequence is intended to
reduce mineral buildup by bringing fresh water into the sump.
s
ummer
l
ockouT
When outside air temperature falls below the summer lockout setpoint, the unit
will be locked into winter mode.
e
xhausT
r
elieF
A digital output is reserved to provide a dry contact that can be used to enable an
exhaust fan or open a relief damper. When enabled this contact will close when
the supply fan is enabled. It can be configured to close during occupied mode,
unoccupied mode, always (both modes) or never.
h
eaT
& V
enT
m
odes
Continuous –
The supply fan will run continuously. Heating will be enabled in
winter mode and supply temperature setpoint will be reset by space temperature.
Cycle – (Winter mode only) the supply fan will cycle upon a call for heating (space
temperature falls below the setpoint) and the supply temperature setpoint will be
elevated to maximum reset limit.
Off
– The unit will be disabled.