Automation and Control Solutions
Honeywell International Inc.
Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North
35 Dynamic Drive
Golden Valley, MN 55422
Toronto, Ontario M1V 4Z9
customer.honeywell.com
C7660 SELECTABLE TEMPERATURE SENSOR
® U.S. Registered Trademark
© 2008 Honeywell International Inc.
63-2670EF—01 M.S. 09-08
The changeover temperature switch settings for the C7660
are shown in Fig. 3. Default and factory setpoint is 63° F.
Changeover on an economizer can operate in two basic
modes:
1) exclusive operation where either the economizer or the
mechanical cooling function, but not both OR
2) integrated operation where the economizer and mechanical
cooling operate at the same time. Integrated operation
requires a two stage cooling thermostat. The integrated
control will provide the most energy savings.
For exclusive operation, the changeover set point needs to
allow mechanical cooling when the economizer can no longer
meet the cooling load requirement. The 63 degree F setting is
the most typical changeover set point for this type of control
but is dependent on the building and climate.
For integrated operation, the changeover should be just at or
just below the typical cooling setpoint expected in the zone
served. For example, if the cooling setpoint is 74 degrees F or
75 degrees F, the changeover setpoint should be set at 73
degrees F.
Fig. 3. C7660 Temperature Sensor Dip Switch Settings.
ON
OFF
1
3
2
78ºF
ON
OFF
1
3
2
73ºF
ON
OFF
1
3
2
68ºF
ON
OFF
1
3
2
63ºF
ON
OFF
1
3
2
58ºF
ON
OFF
1
3
2
55ºF
ON
OFF
1
3
2
53ºF
ON
OFF
1
3
2
48ºF
M27636
DIP SWITCH
POSITION
CHANGEOVER
TEMPERATURE