Instruction manual

30 McQuay OM 920
Keypad/Display Menu Structure
Operating Hours Menu
The Operating Hours menu gives a summary of the hours of operation for each of the supply
fans, return/exhaust fans, compressors, heating and economizer operation.
Supply Fan is a status item which gives the number of hours the supply fan has operated.
Return/Exhaust Fan is a status item which gives the number of hours the return/exhaust fans
have operated.
Mech Cool is a status item which gives the number of hours that mechanical cooling has
operated.
Comp #1 is a status item which gives the number of hours that compressor #1 has operated.
Comp #2 is a status item which gives the number of hours that compressor #2 has operated.
Comp #3 is a status item which gives the number of hours that compressor #3 has operated.
Comp #4 is a status item which gives the number of hours that compressor #4 has operated.
Comp #5 is a status item which gives the number of hours that compressor #5 has operated.
Comp #6 is a status item which gives the number of hours that compressor #6 has operated.
Comp #7 is a status item which gives the number of hours that compressor #7 has operated.
Comp #8 is a status item which gives the number of hours that compressor #8 has operated.
Heating is a status item which gives the number of hours that the heating mode has operated.
Economizer is a status item which gives the number of hours that the economizer has
operated.
Tnt Override is a status item which gives the number of hours that the unit has operated in
the Tenant Override mode of operation.
Dehum is a status item which gives the number of hours that the dehumidification has
operated.
ER Wheel is a status item which gives the number of hours that the energy recovery wheel
has operated.
Extended Menus
The Extended Menus are menu items are used to set up the unit for its HVAC application
Table 22: Operating Hours Menu
Menu Display Name Item Display Name Default Setting Range Password Level
Operating Hours Supply Fan= 0-50000H 6
Ret/Exh Fan= 0-50000H 6
Mech Cool= 0-50000H 6
Comp # 1=
0-50000H 6
Comp # 2= 0-50000H 6
Comp # 3= 0-50000H 6
Comp # 4= 0-50000H 6
Comp # 5=
0-50000H 6
Comp # 6= 0-50000H 6
Comp # 7= 0-50000H 6
Comp # 8= 0-50000H 6
Heating=
0-50000H 6
Economizer= 0-50000H 6
Tnt Override= 0-50000H 6
Dehum= 0-50000H 6
ER Wheel=
0-50000H 6