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Page 13
CBWMV SERIES
Jumper Settings
IMPORTANT
Before changing jumper setting, make sure the mo-
tor has completely stopped. Any jumper setting
change will not take place while the motor is run-
ning.
Table 4 shows the factory blower speed tap settings for
CBWMV series units. These settings are for nominal ton-
nage match−ups with the CBWMV. When matched with
other sizes, it is recommended that the CFM be adjusted
approximately to 400 CFM per ton.
Table 4
Factory Blower Speed Tap Settings
CBWMV
Blower
Speed Tap Selection
Bl
ower
Coil
Cool Pin Heat Pin Adjust Delay
−24B−040 1 2 NORM 4
−36B−070 3 4 NORM 4
−36C−090 3 4 NORM 4
−60C−100 4 4 NORM 4
−60C−120 4 4 NORM 4
To change jumper positions, gently pull the jumper off the
pins and place it on the desired set of pins. The following
section outlines the different jumper selections available
and conditions associated with each one. Refer to figure
14.
After the CFM for each application has been determined,
the jumper settings must be adjusted to reflect those given
in tables 5 through 9. From the tables, determine which row
of CFM volumes most closely matches the desired CFM.
Once a specific row has been chosen (+, NORMAL, or −),
CFM volumes from other rows cannot be used. Below are
descriptions of the jumper selections.
ADJUST Pins Ċ The ADJUST pins allow the motor to run
at normal speed, approximately 10% higher, or approxi-
mately 10% lower than normal speed. Tables 5 through 9
gives three rows (+, NORMAL, and −) with their respective
CFM volumes. Notice that the normal adjustment setting
for heat speed position #3 is 1070 CFM. The + adjustment
setting for that position is 1180 CFM and for the − adjust-
ment setting is 940 CFM. After the adjustment setting has
been determined, chose the remainder speed jumper set-
tings from those offered in the table in that row.
The TEST pin is available to bypass the BDC3 control and
run the motor at approximately 70% to test that the motor is
operational. This is beneficial primarily in troubleshooting.
G must be energized for motor to run.
COOL Pins Ċ The COOL jumper is used to determine the
CFM during either 1) cooling or 2) heat pump operation
without a W1 call for electric heat. These jumper selections
are activated for cooling when Y1 and/or Y2 and DS termi-
nals in the CBWMV unit are energized and for heating
when Y1 and/or Y2 is energized.
For applications with the Harmony
®
Zoning System, the
blower CFM volume is determined by the Harmony control
center. The minimum blower speed is predetermined at
400 CFM for −CBWMV−24B−040 and 36B−070 series units
and 600 CFM for CBWMV−36C−090, 60C−100, and
60C−120 series units. This speed is not adjustable.
With the thermostat set for Continuous Fan" and without a
call for heating or cooling, the CBWMV will provide 38% of
the COOL CFM selected.
HEAT Pins Ċ
The HEAT jumper is used to determine
CFM heating. These jumper selections are activated only
when W1 is energized. (There is a fixed 45 seconds ON
and 30 seconds OFF delay on a W call.)
DELAY Pins Ċ The DELAY jumper is used to set the spe-
cific motor fan operation during cooling mode. Depending
on the application, one of four options may be chosen by
moving the jumper to the appropriate set of pins.
#1 Pins Jumpered Ċ
A Motor runs at 100% until demand is satisfied.
OFFOFF
A B
B Once demand is met, motor ramps down to stop.
#2 Pins Jumpered Ċ
A Motor runs at 100% until demand is satisfied.
OFF
OFF
A
B
C
B Once demand is met, motor runs at 100% for 45
seconds. Then,
C ramps down to stop.
NOTE − Blower OFF DELAY also applies during heat
pump operation
#3 Pins Jumpered Ċ
A Motor runs at 82% for approximately 7−1/2 min-
utes. If demand has not been satisfied after 7−1/2
minutes,
B motor runs at 100% until demand is satisfied.
OFFOFF
AB C
C Once demand is met, motor ramps down to stop.
#4 Pins Jumpered Ċ
A Motor runs at 50% for 30 seconds.
B Motor then runs at 82% for approximately 7−1/2
minutes. If demand has not been satisfied after
7−1/2 minutes.
C Motor runs at 100% until demand is satisfied.
D Once demand is met, motor runs at 50% for 30
seconds. Then,
A
B
OFFOFF
C D
E
E ramps down to stop.