McQuay WSC Operating Manual page 36

WATER Setpoints
Figure 21, WATER Setpoint Screen
Table 19, WATER Setpoint Settings
Description
Templifier Source
Water Reset
(Delta-T)
Templifier Source
No Start
Max Reset Delta
T
Start Reset Delta
T
LWT Reset Type
Stage Delta T
Startup Delta T
Shutdown Delta T
Heat LWT
Ice LWT
Cool LWT
36
N0. Default Range
11
55°F 50 to 100 °F
10 70°F 50 to 100°F
9
0.0°F 0.0 to 20.0 °F
8 10. 0°F 0.0 to 20.0 °F
NONE, RETURN,
7 NONE
4-20mA
6 1
0.5 to 5°F
5 3.0°F 0.0 to 10.0 °F
4 3.0°F 0.0 to 3.0 °F
1
135. 0°F 100.0 to 150.0 °F
2
25. 0°F 15.0 to 35.0 °F
3
44. 0°F 35.0 to 80.0 °F
Pass
Comments
word
Resets the condenser leaving temperature
T downward if source leaving drops under the
delta-T. Setting is a function of comp selection.
Entering source water temperature below which
T
the unit cannot start.
Set the maximum reset that can occur, in
M degrees F if LWT reset is selected or max reset
at 20 mA input if 4-20 mA is selected in SP7
Sets the evap delta-T above which Return reset
M
begins.
Select reset type, NONE for none, RETURN for
M reseting chilled water based on the entering
water, or 4-20 mA for external analog signal
Sets the temperature the leaving water must be
M
below setpoint for next compressor to start.
M Degrees above setpoint for compressor to start.
M Degrees below setpoint for compressor to stop.
Condenser LWT setpoint in HEAT (Templifier)
M
mode
M Evaporator LWT setpoint in the ICE mode
M Evaporator LWT setpoint in COOL mode
OM Centrif Micro ΙΙ-5