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FB4CNF, FB4CNP, FX4D: Installation Instructions
HEAT PUMP HEATING WITH AUXILIARY
ELECTRIC HEAT
Thermostat energizes R to G, R to Y, and R to W. G energizes fan relay
on PCB which completes circuit to indoor blower motor. W energizes
electric heat relay(s) which completes circuit to heater element(s). When
W is de-energized, electric heat relay(s) open, turning off heater
elements. When G is de-energized there is a 90 second delay before fan
relay opens.
ELECTRIC HEAT OR EMERGENCY HEAT MODE
Thermostat closes R to W. W energizes electric heat relay(s) which
completes circuit to heater element(s). Blower motor is energized
through normally closed contacts on fan relay. When W is de-energized,
electric heat relay(s) opens.
START-UP PROCEDURES
Refer to outdoor unit Installation Instructions for system start-up
instructions and refrigerant charging method details.
UNIT SIZE
500
600
0.034
0.049
018, 019
0.034
0.049
024
0.015
0.026
025
- -
- -
030, 031
- -
- -
036
- -
- -
037
- -
- -
042, 043
- -
- -
048
- -
- -
049
- -
- -
060
- -
- -
061
SIZE
400
0.020
018, 019
-
024 - 031
-
036-049
-
060, 061
Sizes 018 - 037
HEATER
ELEMENTS
0
1
2
3
4
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 2 – Air Delivery Performance Correction Component Pressure Drop (in. wc)
At Indicated Airflow (Dry-to-Wet Coil)
700
800
900
1000
0.063
- -
- -
- -
0.063
0.076
0.089
- -
0.038
0.049
0.059
- -
- -
0.049
0.059
0.070
- -
- -
- -
0.070
- -
- -
- -
0.055
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
Table 3 – Factory-Installed Filter Static Pressure Drop (in. wc)
600
800
0.044
0.075
0.022
0.048
-
-
-
-
Table 4 – Electric Heater Static Pressure Drop (in. wc)
EXTERNAL STATIC
kW
PRESSURE
CORRECTION
0
+.02
3, 5
+.01
8, 10
0
9, 15
–.02
20
–.04
PRODUCT DAMAGE HAZARD
Failure to follow this caution may result in poor unit performance
and/or product damage.
Never operate unit without a filter. Factory authorized filter kits may be
used when locating the filter inside the unit. For those applications
where access to an internal filter is impractical, a field-supplied filter
must be installed in the return air duct system.
CARE AND MAINTENANCE
To continue high performance and minimize possible equipment failure,
it is essential that periodic maintenance be performed on this equipment.
Consult your local dealer as to the proper frequency of maintenance
contract.
The ability to properly perform maintenance on this equipment requires
certain mechanical skills and tools. If you do not possess these, contact
your dealer for maintenance. The only consumer service recommended
or required is filter replacement or cleaning on a monthly basis.
CFM
1100
1200
1300
1400
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
0.080
- -
- -
- -
0.080
0.090
0.099
- -
0.064
0.073
0.081
- -
- -
0.049
0.056
0.063
- -
- -
- -
0.063
- -
- -
- -
0.038
- -
- -
- -
- -
- -
- -
- -
- -
CFM
1000
1200
1400
-
-
0.072
0.100
0.051
0.070
0.092
-
-
HEATER
ELEMENTS
0
2
3
4
6
9
CAUTION
!
1500
1600
1700
1800
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
0.070
- -
- -
- -
0.070
0.076
0.083
0.090
0.043
0.049
0.054
0.059
- -
0.049
0.054
0.059
- -
0.027
0.031
0.035
1600
1800
-
-
-
-
-
-
0.120
0.152
-
0.086
0.105
Sizes 042 - 061
EXTERNAL STATIC
kW
0
8, 10
9, 15
20
18, 24, 30
1900
2000
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
0.065
0.070
0.039
0.043
2000
-
-
-
0.130
PRESSURE
CORRECTION
+.04
+.02
0
–.02
–.10
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