507789-01
Issue 2007
Page 17 of 24
Adjust Jumper
The ADJUST pins allow the motor to run at normal speed,
slightly higher (approximately 10%) than normal speed, or
slightly lower (approximately 10%) than normal speed.
The blower performance tables list three rows (+, NORMAL,
and -) with their respective CFM volumes. Notice that for
the 1.5 ton unit, for example, that the normal adjustment
setting for heat speed position #4 is 1050 CFM. The +
adjustment setting for that position is 1150 CFM and for
the - adjustment setting is 950 CFM. After the adjustment
setting has been determined, choose the remaining speed
jumper settings 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 Jumper
The COOL jumper is used to determine the CFM during
either cooling or heat pump operation without a call for
electric heat. These jumper selections are activated for
cooling when Y2 and DS terminals in the
BCE5V are
energized. The are activated for heating when Y2 is
energized.
Applications without the Comfort Sync
®
thermostat will
provide 70% of the COOL CFM during first-stage cooling
for two-stage outdoor units. 100% of COOL speed is
provided for systems with a single-stage outdoor unit.
Applications with the Comfort Sync
®
thermostat, but no
demand for de-humidification will operate as follows:
during a first-stage cooling call (two-stage outdoor unit),
the air volume is 70% of the COOL jumper selection. This
arrangement provides for additional dehumidification during
standard first-stage cooling. See the blower performance
tables for various scenarios concerning use of the Comfort
Sync
®
thermostat and the BCE5V series unit.
For applications with zone control, the air handler CFM
volume is determined by the control center. The minimum
blower speed is predetermined at 250 CFM for -018, -024,
-030 and -036 units and 450 CFM for -042, -048 and -060
units. This speed is not adjustable. See footnotes in the
blower performance tables.
With the thermostat set for Continuous Fan and without a
call for heating or cooling, the BCE5V
provides 50% of the
COOL CFM selected.
NOTE:
For two-stage heat pumps, air handler will operate
at 70% of the COOL selection until supplemental electric
heat is demanded. At that time, the air handler will operate
at the selected HEAT speed. This arrangement provides
warmer supply air during second-stage heating.
Blower Performance
BCE5V18 Blower Performance
0 through 0.80 in. w.g. External Static Pressure Range
ADJUST
Jumper Setting
Jumper Speed Positions
“HEAT” Speed
First Stage “COOL” Speed
Second Stage “COOL” Speed
1
2
3
4
1
2
3
4
1
2
3
4
cfm
cfm
cfm
cfm
cfm
cfm
cfm
cfm
cfm
cfm
cfm
cfm
+
500
705
925
1150
365
520
665
810
500
705
925
1150
NORM
465
650
850
1050
350
485
610
740
465
650
850
1050
–
420
600
760
950
320
425
560
680
420
600
760
950
NOTES - The effect of static pressure, filter and electric heater resistance is included in the air volumes listed.
First stage cooling air volume is 70% of COOL speed setting. Continuous blower speed is approximately 50% of COOL
speed setting.
Zoning System applications - minimum blower speed is 250 cfm.
