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44
McQuay OM 920-1
Keypad/Display Menu Structure
Manual Ctrl
is an adjustable item that puts the unit into manual control. Major components of
the unit are turned on and off by this control. The units normal control sequences are
overridden in this state with the exception of all the “fault” alarms and the cooling circuit high
pressure and low pressure alarms.
Supply Fan
is an adjustable item that turns on the supply fan.
RF/EF
is an adjustable item that turns on the return/exhaust fan.
SAF Spd Cmd
is an adjustable item only on VAV units that sets the speed of the supply air
fan.
RF/EF Spd Cmd
is an adjustable item for units with VFD on the return/exhaust fans that set
the speed of the return/exhaust fan.
OAD/Econo
is an adjustable item which is used to set the economizer damper position.
Manual Control
BP/WR Valve=
0%
0-100%
4
CW Valve=
0%
0-100%
4
ECond VFD=
Off
Off
4
On
ECFan Spd Cmd=
0%
0-100%
4
EC Drn Valve=
Close
Close
4
Open
Sump Pump=
Off
Off
4
On
GasHtgOnOff=
Off
Off
4
On
Htg Valve=
0%
0-100%
4
SCR Out=
0%
0-100%
4
F&BP Damper=
0%
0-100%
4
Htg Stg 1=
Off
Off
4
On
SCR Ena 1=
Off
Off
4
On
Htg Stg 2=
Off
Off
4
On
SCR Ena 2=
Off
Off
4
On
Htg Stg 3=
Off
Off
4
On
Htg Stg 4=
Off
Off
4
On
Htg Stg 5=
Off
Off
4
On
Htg Stg 6=
Off
Off
4
On
Reheat Valve=
0%
0-100%
4
Reheat Stage=
Off
Off
4
ERec Wheel=
Off
Off
4
On
ER Whl Cmd=
0%
0-100%
4
ERBP Dmpr Cl=
Off
Off
4
On
ERBP Dmpr Op=
Off
Off
4
On
Cond Wtr Pump=
Off
Off
4
On
Alm Output=
Off
Off
4
On
FanOp=
Off
Off
4
On
Table 39: Manual Control Manual
Menu Display Name Item Display Name
Default Setting
Range
Password Level