Lui Menu Reference; Changing An Lui Menu Item - McQuay MicroTech II Operation & Maintenance Manual

LUI Menu Reference

The LUI menu eases troubleshooting and simplifies UVC configuration
as the most common parameters and system status values can be
accessed without the need of a Personal Computer or network interface.
The LUI menu is accessed via an unmarked, Hidden button. This
Hidden button is located behind the letter "h" in the MicroTech II logo
on the LUI face.
The LUI menu consists of two levels. The first level is the LUI Menu
Item List containing alphanumeric characters which represent each
parameter. The second level is the level where the parameters value is
viewed, and can be adjusted if the parameter is adjustable. A 5-second
inactivity timer is used to automatically back out of the menu levels
until returning to the effective setpoint display. See figure 5 for
procedure to change LUI Menu Item.
Table 6. LUI Menu Item List
Two Digit
Display LUI Menu Item List
Reset Alarm Input
UVC (Heat/Cool) Mode Output
UVC State Output
Discharge Air Temp Setpoint Output
Discharge Air Temp Output
Ventilation Cooling Low Limit Setpoint
Mechanical Cooling Low Limit Setpoint
Slave Type Configuration
Effective Occupancy Output
Occupancy Override Input
Occupied Cooling Setpoint
Standby Cooling Setpoint
Unoccupied Cooling Setpoint
Occupied Heating Setpoint
Standby Heating Setpoint
Unoccupied Heating Setpoint
Wall Sensor Type
Outside Air Damper Position Output
OAD Min Position High-Speed Setpoint OADH
OAD Min Position Med-Speed Setpoint OADM
OAD Min Position Low-Speed Setpoint OADL
Exhaust Interlock OAD Min Position
Setpoint
Energize Exhaust Fan OAD Setpoint
OAD Max Position Setpoint
OAD Lockout Enable
OAD Lockout Setpoint
Continued on next page.
OM 750
Figure 5. Changing an LUI Menu Item
Abr. Description
Enter 1 to clear alarms (clears all inactive alarms, except filter alarm).
You must enter a 0 value after entering a 1 in order to re-enable the
alarm feature.
UVCM Display current UVC mode.
UVCS Display current UVC state.
DATS Display current DA temperature setpoint.
DAT Display current DA temperature.
VCLL Adjust economizer cooling DA temperature low limit.
Adjust mechanical cooling DA temperature low limit. This value can only
MCLL
be displayed in degrees C.
Set slave type: 0 = Independent (slave uses own sensors),
1 = Dependent (slave follows master).
Display current occupancy: 0 = occupied, 1 = unoccupied, 2 = bypass,
3 = standby.
Set occupancy: 0 = occupied, 1 = unoccupied, 2 = bypass, 3 = standby.
Adjusting this variable is only intended for troubleshooting, once you
are done you must cycle unit power to clear this variable and return the
UVC to normal operation.
OCS Adjust occupied cooling setpoint.
SCS Adjust standby cooling setpoint.
UCS Adjust unoccupied cooling setpoint.
OHS Adjust occupied heating setpoint.
SHS Adjust standby heating setpoint.
UHS Adjust unoccupied heating setpoint.
Set wall sensor type: 0 = +/- 3°F, 1 = 55°F to 85°F.
OADP Display OA damper position.
Adjust OA damper minimum position with IAF at high speed. (this
variable will be factory set to 5% open when the unit is ordered with
optional CO2 DCV)
Adjust OA damper minimum position with IAF at medium speed. (this
variable is ignored when the unit is ordered with optional CO
Adjust OA damper minimum position with IAF at low speed. (this
variable is ignored when the unit is ordered with optional CO
Adjust OA damper minimum position when the exhaust interlock
EOAD
input is energized.
Adjust OA damper position above which the exhaust fan output will
OADE
be energized.
OAMX Adjust OA damper maximum position.
Set OA damper lockout feature status: 0 = disable, 1 = enable.
(this variable will be factory set to 1 when the unit is ordered
as a recirc unit with no OAD)
Adjust OA temperature below which the OA damper will be closed
OALS if the OA damper lockout is enabled. (this variable will be factory set
to –99 O C when the unit is ordered as a recirc unit with no OAD)
04 Default
RW x
RO x
RO x
RO x
RO x
RW x 54 O F (12
RW x 45 O F (7
RW x 0
RO x
RW x
O
RW x 73 F (23
RW x 77 O F (25
O
RW x 82 F (28
O
RW x 70 F (21
RW x 66 O F (19
RW x 61 O F (16
RW x 0
RO x
RW x 20%
RW x 30%
DCV)
2
RW x 35%
DCV)
2
RW x 99%
RW x 10%
RW x 99%
RW x 0
RW x 36 O F (2
Page 7 of 32
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