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DIP Switch Settings
NOTE - All communicating settings are set at the com-
municating thermostat. See thermostat installation in-
struction. In a communication system all DIP switch and
clippable link settings are ignored. For conventional ther-
mostats proceed with DIP switch and clippable link set-
tings as outlined in the following.
Heating Operation DIP Switch Settings
Switch 1 -- Thermostat Selection -- This unit may be
used with either a single-stage or two-stage thermostat.
The thermostat selection is made using a DIP switch
which must be properly positioned for the particular appli-
cation. The DIP switch is factory-positioned for use with a
two-stage thermostat. If a single-stage thermostat is to be
used, the DIP switch must be repositioned.
a. Select "OFF" for two-stage heating operation controlled by a
two-stage heating thermostat (factory setting);
b. Select "ON" for two-stage heating operation controlled by
a single-stage heating thermostat. This setting provides a
timed delay before second-stage heat is initiated.
Switch 2 -- Second Stage Delay (Used with Single-
Stage Thermostat Only) -- This switch is used to de-
termine the second stage on delay when a single-stage
thermostat is being used. The switch is factory-set in the
OFF position, which provides a 7-minute delay before
second-stage heat is initiated. If the switch is toggled to
the ON position, it will provide a 12-minute delay before
second-stage heat is initiated. This switch is only activat-
ed when the thermostat selector jumper is positioned for
Single-stage thermostat use.
Switches 3 and 4 -- Blower-Off Delay -- The blower-on
delay of 30 seconds is not adjustable. The blower-off delay
(time that the blower operates after the heating demand
has been satisfied) can be adjusted by moving switches 3
and 4 on the integrated control. The unit is shipped from
the factory with a blower-off delay of 90 seconds. The
blower off delay affects comfort and is adjustable to sat-
isfy individual applications. Adjust the blower off delay to
achieve a supply air temperature between 90° and 110°F
at the exact moment that the blower is de-energized. Lon-
ger off delay settings provide lower supply air tempera-
tures; shorter settings provide higher supply air tempera-
tures. TABLE 4 provides the blower off timings that will
result from different switch settings.
TABLE 4
Blower Off Delay Switch Settings
Blower Off Delay
(Seconds)
60
90 (factory)
120
180
Switch 3
Switch 4
On
Off
Off
Off
Off
Off
On
Off
Indoor Blower Operation DIP Switch Settings Switch-
es 5 and 6 -- Cooling Mode Blower Speed -- The unit is
shipped from the factory with the dip switches positioned
for high speed (4) indoor blower motor operation during
the cooling mode. TABLE 5 provides the cooling mode
blower speeds that will result from different switch settings.
Switches 5 and 6 set the blower cfm for second-stage cool.
The integrated control automatically ramps down to 70%
of the second-stage cfm for first-stage cfm. Refer to tables
at the front of this manual for corresponding cfm values.
Cooling Mode Blower Speeds
Speed
Low
Medium Low
Medium High
High (Factory)
Switches 7 and 8 -- Cooling Blower Speed Adjustment
The unit is shipped from the factory with the dip switches
positioned for NORMAL (no) adjustment. The dip switches
may be positioned to adjust the blower speed by +10%
or -10% to better suit the application. TABLE 6 provides
blower speed adjustments that will result from different
switch settings. Refer to tables at the front of this manual
for corresponding cfm values.
Cooling Blower Speed Adjustment
Adjustment
+10% (approx.)
Factory Default
-10% (approx.)
Switches 9 and 10 -- Cooling Mode Blower Speed
Ramping -- Blower speed ramping may be used to en-
hance dehumidification performance. The switches are
factory set at option A which has the greatest effect on de-
humidification performance. TABLE 7 provides the cooling
mode blower speed ramping options that will result from
different switch settings. The cooling mode blower speed
ramping options are detailed below.
NOTE - The off portion of the selected ramp profile also
applies during heat pump operation in dual fuel applica-
tions.
Cooling Mode Speed Ramping
Ramping Option
A (factory)
B
C
D
Page 34
TABLE 5
Switch 5
Switch 6
On
On
Off
On
On
Off
Off
Off
TABLE 6
Switch 7
Switch 8
On
Off
Off
Off
Off
On
TABLE 7
Switch 9
Switch 10
Off
Off
Off
On
On
Off
On
On
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