10
b. Heat strip selection - For units with a heat strip
installed at the factory (Model 620515), the #1
dip switch will be in the "ON" position. All other
models will have the dip switches in the "OFF"
position.
c. Furnace selection - when a furnace has been
connected to a zone, place the furnace dip
switch "ON" for that zone.
d. Differential - differential is the temperature differ-
ence between the "ON/OFF" cycle of the thermo-
stat. The normal differential is preset in the
circuit board with the dip switch set to the "OFF"
position. In some situations, it may be neces-
sary to decrease the Differential. The location of
the thermostat may create a condition where
the normal Differential will not maintain your
comfort zone. If this occurs, the Differential can
be shortened by placing the Differential dip
switch to the "ON" position.
Note: Setting the Differential dip switch should only be
required when installation conditions are less than desirable
and is not covered under the limited warranty.
e. Stage selection - stage is not used on these
units. Leave in the "OFF" position.
f. Gen start selection - leave in the "OFF" position.
g. Replace the unit electrical box cover.
h. Replace the shroud.
i. Repeat this procedure for each additional zone.
620515, 620525, 620526, 630515 & 630516 Installation Instructions
a. Zone selection - when two or more units are
installed and controlled by one Comfort Con-
trol Center
TM
, the second unit becomes Zone
2, the third unit Zone 3 and the fourth unit Zone
4. The appropriate zone dip switch must be set
in each electronic control kit for Zone 2, 3 and 4.
FIG. 19
DIP
SWITCHES
12 345
HEAT STRIP
ZONE 2
ZONE 3
ZONE 4
FURNACE
ON
678
DIFFERENTIAL
STAGE
GEN START
2. System Reset
After setting the dip switches in the electronic
control kit, do a system reset.
a. Turn the ON/OFF switch to the "OFF" position.
b. Simultaneously depress and hold the MODE
and ZONE push-buttons while turning the ON/
OFF switch to "ON". FF should appear in LCD
display until the mode and zone push-buttons
are released.
c. When a dip switch is turned on after initial
configuration, a system reset will need to be
done before the Comfort Control Center™ will
recognize the updated selection.
3. System Checkout
We recommend that power be supplied to the air
conditioner and check for proper operation. Verify
that all features of the installed system work. See
Comfort Control Center™ Operating Instructions.
Check fan speeds, cooling mode, heat pump mode,
furnace (if connected) and heat strip. If the features
do not work, check all wiring and confirm that the
correct options have been selected on the Elec-
tronic Control Board.
(20 pages)
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