Circulator Blower Speeds - Goodman MVC8 Installation Instructions Manual

HEAT EXCHANGER
RADIATION "LINE OF SIGHT"
Temperature Rise Measurement
C B S
IRCULATOR LOWER PEEDS
T
O AVOID PERSONAL INJURY
OFF
TURN POWER TO THE FURNACE
Speed Selection Dip Switches
Cool Adjust
Selection Selection
Switches Switches
TAP S3- 1 S3- 2 S3- 3 S3- 4 S4-1 S4-2
A OFF OFF OFF OFF
B ON OFF ON OFF
C OFF ON OFF ON
D ON ON ON ON
Profiles Pre-Run
A -------
B -------
C -------
D 30 sec/50%
To Set Airflow: (1) Select model and desired High Stage Cooling Airflow. Determine
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
dip switches S4-1* and S4-2* to the appropriate ON / OFF positions.
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.
Continuous Fan Speed: Set dip switches S5-3* and S5-4* to select one of 4
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
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.
SUPPLY
AIR
T
SUPPLY
T T
RISE =
-
SUPPLY RETURN
T
RETURN
RETURN
AIR
WARNING
OR DEATH DUE TO ELECTRICAL SHOCK
BEFORE CHANGING SPEED
Profile Heat
Selection Selection
Switches Switches
*DVC80603B***
S4- 3 S4- 4
OFF OFF OFF OFF
ON OFF ON OFF
*DVC80805C***
OFF ON OFF ON
ON ON ON ON
Short-Run OFF Delay
-------- 60 sec/100%
*DVC81005C***
30 sec/50% 60 sec/100%
7.5 min/82% 60 sec/100%
7.5 min/82% 30 sec/50%
*MVC80604B***
*MVC80805C***
*MVC81005C***
0140F01170
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.
.
TAPS
Model Tap Low Stage
Cool
A 390
B 520
C 650
D 780
A 520
B 715
C 910
D 1170
A 553
B 748
C 943
D 1203
A 390
B 520
C 715
D 910
A 520
B 715
C 910
D 1170
A 520
B 715
C 910
D 1170
28
30,000/12,000 = 2.5 Tons
High Stage Low Stage
Cool Heat
600 735
800 805
1000 875
1200 945
800 945
1100 1015
1400 1085
1800 1155
850 1085
1150 1155
1450 1225
1850 1260
600 875
800 945
1100 1015
1400 1085
800 1050
1100 1120
1400 1190
1800 1260
800 1210
1100 1225
1400 1245
1800 1260
High Stage
Heat
1050
1150
1250
1350
1350
1450
1550
1650
1550
1650
1750
1800
1250
1350
1450
1550
1500
1600
1700
1800
1725
1750
1775
1800