28
RISE =
SUPPLY
AIR
RETURN
AIR
HEAT EXCHANGER
RADIATION "LINE OF SIGHT"
T
RETURN
T
SUPPLY
T
SUPPLY
-
T
RETURN
Temperature Rise Measurement
C
IRCULATOR
B
LOWER
S
PEEDS
T
O
AVOID
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
TURN
OFF
POWER
TO
THE
FURNACE
BEFORE
CHANGING
SPEED
TAPS
.
WARNING
This furnace is equipped with a multi-speed circulator blower.
This blower provides ease in adjusting blower speeds. The
Specification Sheet applicable to your model provides an air-
flow table, showing the relationship between airflow (CFM) and
external static pressure (E.S.P.), for the proper selection of
heating and cooling speeds. The heating blower speed is
shipped set at “B”, and the cooling blower speed is set at “D”.
These blower speeds should be adjusted by the installer to
match the installation requirements so as to provide the cor-
rect heating temperature rise and correct cooling CFM.
Use the dual 7-segment LED display adjacent to the dipswitches
to obtain the approximate airflow quantity. The airflow quantity
is displayed as a number on the display, rounded to the near-
est 100 CFM. The display alternates airflow delivery indication
and the operating mode indication.
Example:
The airflow being delivered is 1225 CFM. The dis-
play indicates 12. If the airflow being delivered is 1275, the
display indicates 13.
1. Determine the tonnage of the cooling system installed
with the furnace. If the cooling capacity is in BTU/hr divide
it by 12,000 to convert capacity to TONs.
Example:
Cooling Capacity of 30,000 BTU/hr.
30,000/12,000 = 2.5 Tons
NOTE:
Airflow data shown applies to legacy mode operation only. For a fully communicating system, please see the
outdoor unit’s installation instructions for cooling and pump heating airflow data. See
ComfortNet™ System - Airflow
Consideration
section for details.
continuous fan speeds (25%, 50%, 75%, or 100%). " See installation manual
for details"
*the “S” number refers to one of four labeled dip switch section each containing 4
individual dip switches. The following number refers to the individual labeled dip
switch within that section
Model Tap Low Stage High Stage Low Stage High Stage
Cool Cool Heat Heat
A 520 800 1210 1725
B 715 1100 1225 1750
C 910 1400 1245 1775
D 1170 1800 1260 1800
A 553 850 1085 1550
B 748 1150 1155 1650
C 943 1450 1225 1750
D 1203 1850 1260 1800
A 390 600 875 1250
B 520 800 945 1350
C 715 1100 1015 1450
D 910 1400 1085 1550
A 390 600 735 1050
B 520 800 805 1150
C 650 1000 875 1250
D 780 1200 945 1350
A 520 800 945 1350
B 715 1100 1015 1450
C 910 1400 1085 1550
D 1170 1800 1155 1650
A 520 800 1050 1500
B 715 1100 1120 1600
C 910 1400 1190 1700
D 1170 1800 1260 1800
Speed Selection Dip Switches
the corresponding tap (A, B, C, or D). Set dip switches S3-1* and S3-2* to the
appropriate ON / OFF positions. (2) Select model and desired High Stage Heating
Airflow. Determine the corresponding tap (A, B, C, or D). Set dip switches S4-3* and
S4-4* to the appropriate ON / OFF positions. (3) Selecting Airflow Adjustment Factor:
For 0% trim set S5-2* to OFF (trim disabled). If trim is desired set S5-2* to ON (trim
enabled) and set S3-3* and S3-4* to appropriate ON / OFF positions. Tap A is +5%,
Tap B is -5%, Tap C is +10%, Tap D is -10%.
To Set Comfort Mode: Select Desired Comfort Mode profile (see profiles above). Set
Profiles Pre-Run Short-Run OFF Delay
Cool Adjust Profile Heat
Selection Selection Selection Selection
Switches Switches Switches Switches
A OFF OFF OFF OFF OFF OFF OFF OFF
Dehumidification: To enable, set switch S5-1* to ON. Cooling airflow will be reduced
to 85% of nominal value during cool call. To disable, set switch S5-1* to OFF.
D 30 sec/50% 7.5 min/82% 30 sec/50%
D ON ON ON ON ON ON ON ON
B ------- 30 sec/50% 60 sec/100%
C OFF ON OFF ON OFF ON OFF ON
B ON OFF ON OFF ON OFF ON OFF
TAP S3- 1 S3- 2 S3- 3 S3- 4 S4-1 S4-2 S4- 3 S4- 4
dip switches S4-1* and S4-2* to the appropriate ON / OFF positions.
A ------- -------- 60 sec/100%
C ------- 7.5 min/82% 60 sec/100%
To Set Airflow: (1) Select model and desired High Stage Cooling Airflow. Determine
*DVC81005C***
*DVC80805C***
*DVC80603B***
*MVC81005C***
*MVC80805C***
Continuous Fan Speed: Set dip switches S5-3* and S5-4* to select one of 4
0140F01170
*MVC80604B***
