McQuay GZ 035AM

58 IOMM ACZ/AGZ-1
Adjustable Points
The following McQuay Global Scroll Chiller points are adjustable by the Zone Terminal.
Table 21, Adjustable Points
VALUESTEMPLATE
NAME
FACTORY SETPOINT RANGE
OA/AI3 HiLim SP 80°F 0 to 100°F
OA/AI3 Reset SP -40°F -100 to 100°F
LvgWtr Rband SP 0°F 0 to 15°F
Unoccpd Lvg SP 760°F 40 to 90°F
OA Lockout SP -10°F -20 to 65°F
Lvg Low Lim SP 20°F 20 to 40°F
SoftSta Capcty 50% 0 to 100%
SoftStart Time 2 min 0 to 20 minutes
Zone Terminal Glossary
Lvg Water Temp - Shows the temperature of the water leaving the evaporator.
Evap Pres #1 - Shows the evaporator pressure for refrigerant circuit #1.
Evap Pres #2 - Shows the evaporator pressure for refrigerant circuit #2.
OA/AI3 Input - Reset input signal (Outdoor Air Temp. is standard), non-adjustable
OA/AI3 HiLimSP - Used in algorithm for Outside Air Reset. Adjusts Outdoor Air High Limit
(OAHL)(default is 80°F).
OA/AI3 Reset SP - Used in algorithm for Outside Air Reset. Adjusts Outdoor Air Reset Band
(OARB)(default is -40°F; therefore outdoor air reset is 40-80 DegF).
Lvg Water SP - Shows the dial adjustment setpoint. Non-adjustable from ZT.
LvgWtr Rbnd SP - Can be adjusted through the ZT, 0° - 15°F (default is 0°F). Used in algorithm for
Outside Air Reset. (For an example of 10°F reset; 45 DegF Leaving Water Setpoint reset up to
55°F).
Contrl Band SP - Indicates what the Control Band Knob is set at. Non-adjustable from ZT.
Actual Lvg SP - Shows the actual setpoint, including any reset that is occurring.
Unoccpd Lvg SP - Adjustable from 40°F - 90°F (default is 70°F). The setpoint is activated by a
timeclock in unoccupied mode.
OA Lockout SP - Adjustable from -20°F to 65°F (default is -10°F). Shuts the unit off when the Outside
Air reaches the setpoint. (Differential = 5°F).
% Unit Load - Indicates the % of the unit load.
Lvg Low Lim SP - Adjustable from 20°F - 40°F (default is 20°F). This safety that will shut the chiller
off based on the leaving water temperature going below this setpoint.
NOTE: Some models may have substitute Freezstat SP.at 54 psig
SoftSta Capcty - Adjusts the ramping of steps from 0% - 100% (default is 50%).
SoftStart Time - Adjustable ramping time from 0 - 20 minutes (default is 2 minutes).
Cir #1 Starts - Counts the number of starts for circuit #1.
•