McQuay MicroTech III RAH User Manual

26 McQuay OM 920-1
Keypad/Display Menu Structure
Max Fan Diff is an adjustable item which sets a differential between the discharge and return
fan capacities at which the minimum allowable Min OA Position is fully reset up to the
Ventilation Limit.
OA Flow is a status only item which indicates the current outdoor airflow based on an
optional OA airflow sensor input used when the unit is equipped the DesignFlow OA control
feature.
Min OAFlw Spt is an adjustable item that is used to set the minimum design flow CFM's
when the unit is equipped with the optional DesignFlow OA control feature.
Min Clg Spd is an adjustable item that sets the discharge fan speed on a VAV unit at which the
Ventilation Limit reaches the LoFloVent= value.
LoFlo Vent Limit is an adjustable item that sets the maximum value for the Ventilation Limit
on a VAV unit.
Heating Menu
The Heating menu provides a summary of the control parameters for units with heating. The
unit's heating mode of operation is controlled by the control temperature and the heating
setpoint temperature. The unit goes into the heating mode of operation by analyzing the
control temperature. The control temperature can be return temperature, space temperature or
outside air temperature. The unit goes into the heating mode of operation when the control
temperature is below the heating setpoint by more than ½ the deadband.
Zone Htg Spt is an adjustable item which sets the control temperature at which the unit will
go into the heating mode of operation.
Unocc Htg Spt is an adjustable item which sets the zone temperature at which the unit starts
up and provides unoccupied heating (night setback) during unoccupied periods.
MWUSpt is an adjustable item which sets the heating setpoint to be used during morning
warm up on a discharge temperature control unit.
Table 15: Heating Menu
Menu Display Name Item Display Name Default Setting Range Password Level
Heating Zone Htg Spt= 68.0°F 0.0-100.0°F 6
Unocc Htg Spt= 55.0°F 40.0-100.0°F 6
MWUSpt= 70.0°F 40.0-100.0°F 6
DAT Htg Spt= 100.0°F 40.0-140.0°F 6
Htg Reset= None None 6
Ntwrk
Space
Return
OAT
ExtmA
ExtV
Min Htg Spt= 55.0°F 40.0-140.0°F 6
Min Htg Spt @ 0/ 0-100/ 6
NA NA
°F
°C
mA
Max Htg Spt= 55.0°F 40.0-140.0°F 6
Max Htg Spt @ 0/ 0-100/ 6
NA NA
°F
°C
mA
Min DAT Ctrl= Yes Yes/No 6
Min DAT Limit= 55.0°F 0.0-70.0°F 6
Occ Heating= Yes No 6
Yes

McQuay MicroTech III RAH Specifications

General

Brand	McQuay
Model	MicroTech III RAH
Category	Controller
Language	English