Honeywell T775 Series 2000 Application Manual page 43

T775L Replacement for W7100C
Discharge Air Controller (continued)
Component/Function
Sensor
Economizer
Heat/Cool switch
changeover
Setpoint and Reset
Control Band
Satellite (if used)
Table 5. T775L Replacement for W7100C.
W7100C
Discharge Air Controller
C7100
T7047C1025 and S963B1037
M955, Q209A, and H705
T675A
• Setpoint and Reset dial
• S963B1078 or S963B1086 Remote setpoint adjustment is not possible.
• S963B1037 and
T7047C1025
Control Band dial
W7101A (if used)
T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS
In this replacement application, the T775L provides the
following, as described in Table 5:
T775L Replacement
Sensor A - C7100D1001
Sensor B - Standard 1097 Ohm temperature sensor; space or outdoor
See "Temperature Sensors" on page 3.
The T775L can not provide a direct economizer function. However, an
output relay can be used to enable a separate economizer module
(e.g., W7212) to provide economization.
Connect the Digital Input terminal to an outdoor temperature control,
e.g. T6031 or T675A).
Program the Digital Input for Setback using -40° F (-40° C) for the
T675A cooling setpoint to lock out the cooling system during cold
weather.
Reset programming in the T775L provides the reset curve.
NOTES: 1. Reset can be used for Heating or Cooling, but not both.
2. Remote adjustment of the reset curve is not possible.
Set the programmable Throttling Range parameter to match the
application.
By adding up to two T775S Expansion modules, you have up to 12
relays available.
43 63-7147—05