Operating Hours Menu - McQuay MicroTech III RAH Operation And Maintenance Manual

Keypad/Display Menu Structure
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Htg Rate is an adjustable item that sets the rate of temperature rise in degrees per minute
when the unit was last started optimally in heating.
Htg OAT is an adjustable item that sets the outdoor air temperature when the unit was last
started optimally in heating.
Design Htg OAT is an adjustable item that sets the outdoor air temperature at which the
heating system could just hold the load. The rate of temperature rise would equal zero.
Clg Rate is an adjustable item that sets the rate of temperature drop in degrees per minute
when the unit last started optimally in cooling.
Clg OAT is an adjustable item that sets the outdoor air temperature when the unit was last
started optimally in cooling.
Design Clg OAT is an adjustable item that sets the outdoor air temperature at which the
cooling system could just hold the load. Rate of temperature rise would equal zero.

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.
Table 22: Operating Hours Menu
Menu Display Name Item Display Name
Operating Hours Supply Fan=
Ret/Exh Fan=
Mech Cool=
Comp # 1=
Comp # 2=
Comp # 3=
Comp # 4=
Comp # 5=
Comp # 6=
Comp # 7=
Comp # 8=
Heating=
Economizer=
Tnt Override=
Dehum=
ER Wheel=
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.
Default Setting Range
- 0-50000H
- 0-50000H
- 0-50000H
- 0-50000H
- 0-50000H
- 0-50000H
- 0-50000H
- 0-50000H
- 0-50000H
- 0-50000H
- 0-50000H
- 0-50000H
- 0-50000H
- 0-50000H
- 0-50000H
- 0-50000H
Password Level
6
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McQuay OM 920-1