Honeywell T8602C Chronotherm IV Manual page 2

ELECTRONIC PROGRAMMABLE THERMOSTATS
Fig. 2. Leveling mounting plate.
ADJUSTMENTS
Adjust Fan Operation Switch, as
Required
The thermostat Fan Operation switch, labeled Fuel
Switch, is factory set in the F position. See Fig. 3.This is
the correct setting for most systems.
If your system is an electric heat system, set the switch to
E. The E setting allows the fan to turn on immediately
with the heating or cooling in a system where the G
terminal is connected.
Adjust System On-time, as Required
The system on-time is factory-set for a warm air, gas or
oil heating system. If you are installing it on another type
of system, adjust the system on-time accordingly by
setting DIP switches 1 and 2 on the back of the
thermostat. See Table 1.
6 9 - 1 6 3 3 - 2
LEVEL
Heating System
Warm air
furnace
Hot water or
high efficiency
M1714A
warm air furnace
Electric furnace
For longer furnace on-time, readjust DIP switches 1 and
2
as follows:
• Warm Air Furnace—set at the Hot Water setting (1 —
Off, 2—On).
• Electric Furnace— Leave at the Warm Air Furnace
setting (1—On, 2—Off).
NOTE: This thermostat does not have a setting for
IMPORTANT
THERMOSTAT BACK
Fig. 3. Back view of thermostat.
2
Table 1. Setting System On-Time.
DIP Switch Position
1 - On
1-Off
1 - On
steam/gravity air. Cycles would not be long
enough for accurate temperature control.
When using a high efficiency furnace such as a
90 percent or greater AFUE (Average Fuel Utili­
zation Efficiency) unit, set DIP switch 1 to Off
and set DIP switch 2 to On.
Fuel
Switch
Position
2 - On F
2 - On F
2 - Off E