Installation, Operation and Maintenance Manual
Marvel Plus
10
Subject to change without notice.
120.5-IM (1018)
Compressor Discharge Pressure Screen
U01 Refrigerant
Pressure Control
Control Press >
351psi
Compressor 1 >
351psi
Compressor 2 >
307psi
Compressor 3 >
251psi
Compressor 4 >
180psi
This screen is used with the electronic discharge pressure
control option� It shows the refrigerant liquid pressure
readings of all compressors and adjusts the pressure based
on the highest operating pressure of all compressors� The
Control Pressure is determined by the compressor with the
highest operating pressure� The pressure is then adjusted
by modulating the discharge pressure control water valve to
maintain the refrigerant pressure set point�
System Status Screen
U01
System Status
Cooling Off
Heating Off
Reheat 100%
Humidify 000%
Dehumidify 100%
This screen shows the amount of demand for cooling,
heating, humidification, dehumidification, and reheat. The
status of cooling, heating, humidification, dehumidification,
and reheat shown on the screen is the amount of cooling/
heating required to meet the set point required�
Water Status Screen
U01 Water
Water Pump ON
Temperature >
40.8°F
Water Econ Dem >
000%
This screen shows the status of the water pump option and
the reading for entering water temperature and percentage
of demand for water economizer mode of operation� This
screen only appears with the water side economizer option�
Compressor Status Screen
U01
Compressor Status
Compressor 1 > ON
Compressor 2 > ON
Compressor 3 > OFF
Compressor 4 > OFF
This screen monitors the status of the systems compressors�
When the on-board or wall control displays ON, the particular
compressor that has the ON listed next to it should be
operating� The amount of compressors displayed is based
on the number of compressors the unit has available� For a
two compressor system, only compressor 1 and Compressor
2 enable points will appear�
