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10 McQuay OM 751
Getting Started
Figure 5: Changing a keypad/display menu item
Table 7: Keypad/display menu item list
Display Keypad menu item list Abr. Description
RO
RW
1
05
Default
rA
Reset Alarm Input Enter 1 to clear alarms (clears all inactive alarms, except filter alarm). To enable
the alarm again, enter 0.
RW x
//
2
HC
UVC (Heat/Cool) Mode
Output
UVCM
Display current UVC mode. 1 = Heat, 3 = Cool, 4 = Night Purge, 6 = Off, 8 = Emerg.
Heat, 9 = Fan Only
RO x
St
UVC State Output
UVCS
Display current UVC state. 1 = EconMech, 2 = Mech, 3 = Econ, 4 = DA Heat, 5 =
Heat, 6 = ActiveDehum, 7 = Full Heat, 8 = Night Purge, 9 = Off, 10 = Fan Only, 11
= Heat Mode Cant Heat, 12 = CantCool, 13 = Emerg Heat Mode Cant Heat, 14 =
Heat Mode Low Limit, 15 = Cool Mode Low Limit
RO x
d0
Discharge Air Temp Set
point Output
DATS Display current DA temperature set point. RO x
d1
Discharge Air Temp
Output
DAT Display current DA temperature. RO x
d2
Ventilation Cooling Low
Limit set point
VCLL Adjust economizer cooling DA temperature low limit. RW x
54°F
(12°C)
d3
Mechanical Cooling Low
Limit set point
MCLL Adjust mechanical cooling DA temperature low limit. RW x
45°F
(7°C)
SL
Slave Type Configuration Set slave type: 0 = Independent (slave uses own sensors), 1 = Dependent (slave
follows master). This feature requires a network over which the master and slave
UVCs can communicate.
RW x 0
Eo
Effective Occupancy
Output
Display current occupancy. RO x
o(
Occupancy Override
Input
Set occupancy: 0 = occupied, 1 = unoccupied, 2 = bypass, 3 = standby. Adjusting
this variable is intended only for troubleshooting. Once you are done, cycle unit
power to clear this variable and return the UVC to normal operation.
RW x
//
2
(o
Occupied Cooling set
point
OCS Adjust occupied cooling set point. RW x
73.4°F
(23°C)
(S
Standby Cooling Set
point
SCS Adjust standby cooling set point. RW x
77°F
(25°C)
(U
Unoccupied Cooling Set
point
UCS Adjust unoccupied cooling set point. RW x
82.4°F
(28°C)
ko
Occupied Heating Set
point
OHS Adjust occupied heating set point. RW x
69.8°F
(21°C)
kS
Standby Heating Set
point
SHS Adjust standby heating set point. RW x
66.2°F
(19°C)
kU
Unoccupied Heating Set
point
UHS Adjust unoccupied heating set point. RW x
60.8°F
(16°C)
rS
Wall Sensor Type
Set wall sensor type: 0 = +/–3F, 1 = 55°F to 85°F. RW x 0
o1
Outside Air Damper
Position Output
OADP Display OA damper position. RO x
o2
OAD Min Position High-
Speed Set point
OADH
Adjust OA damper minimum position with IAF at high speed. (This variable is
factory set to 5% open when the unit is ordered with optional
CO
2
DCV.)
RW x 20%
o3
OAD Min Position Med-
Speed Set point OADM
Adjust OA damper minimum position with IAF at medium speed. (This variable is
not used when the optional
CO
2
DCV is enabled. Only OADH is active as the OA
damper minimum regardless of fan speed.)
RW x 25%
o4
OAD Min Position Low-
Speed Set point OADL
Adjust OA damper minimum position with IAF at low speed. (This variable is not
used when the optional
CO
2
DCV is enabled. Only OADH is active as the OA
damper minimum regardless of fan speed.)
RW x 30%