Honeywell T775 Series - Page 17

T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS
17 63-7147—3
Chilled Water Reset (continued)
Device Checkout
The T775 performance can be checked out to determine if
proper operation exists.
For example, when the outside air temperature is at 80° F
(27° C), the chiller water temperature should be 52.5° F
(11° C). See Fig. 17. Use the alternate Home screens to
check that the effective setpoint is adjusting correctly based
on the outside air temperature (sensor B).
NOTE: The alternate Home screens do not show live
updates of the sensor temperature. They show the
temperature only at the moment the button is
pressed.
1. From the Home screen, use the $ button to verify
the setpoint temperature for each output.
2. Then, press the HOME button to view the actual
outside air temperature (sensor B).
Fig. 17. Chiller Setpoint vs. Outside Temperature.
M24876
CHILLED WATER
SETPOINT TEMPERATURE
OUTSIDE AIR
TEMPERATURE
60°
45°
48.75°
52.5°
56.25°
70°
90°
85°
80°
75°