AC/HP CFM ADJUST – SELECT MEDIUM, LOW, OR HIGH
AIRFLOW
To provide airflow at rates described above, the AC/HP ADJUST
select is factory set to the nominal (nom) tap. The adjust selections
HI/LO will regulate airflow supplied for all operational modes,
except non-heat pump heating modes, +15 percent and -10 percent
respectively. The adjust selection options are provided to adjust
airflow supplied to meet individual installation needs for such
things as noise, comfort, and humidity removal. (See Fig. 19, D as
indicated.)
ON/OFF DELAY – SELECT DESIRED TIME DELAY PRO-
FILE
Four motor operation delay profiles are provided to customize and
enhance system operation. (See Fig. 19, E as indicated)
Selection options are:
1. The standard 90 sec off delay (Factory setting) at 100 percent
airflow.
2. No delay option used for servicing unit or when a thermostat
is utilized to perform delay functions.
3. A 30 sec on delay with no airflow/90 sec off delay at 100
percent airflow profile is used when it is desirable to allow
system coils time to heat-up/cool-down in conjunction with
the airflow.
4. ENH, enhanced selection, provides a 30 sec on delay with no
airflow/ plus 150 seconds at 70 percent airflow/no off delay
for added comfort. (This profile will minimize cold blow in
heat pump operation and could enhance system efficiency.)
CONTINUOUS FAN — SELECT DESIRED FAN SPEED
WHEN THERMOSTAT IS SET ON CONTINUOUS FAN
1. LO speed — factory setting, 50 percent cooling mode airflow
2. MED speed — move connector to MED, 65 percent cooling
mode airflow.
3. HI speed — move connector of HI, 100 percent cooling mode
airflow. (See Fig. 19, F as indicated.)
LOW-VOLTAGE CIRCUIT FUSING AND REFERENCE
The low-voltage circuit is fused by a board-mounted 5-amp
automotive fuse placed in series with the transformer SEC2 and
the R circuit. The C circuit of the transformer is referenced to
chassis ground through a printed circuit run at SEC1 connected to
metal standoff marked with ground symbol.
BASIC FAN COIL CONFIGURATION
The following basic configuration of the fan coil will provide the
ARI rated performance of the heat pump.
1. AUX HEAT KW/CFM — Select the heater range for the size
electric heater installed.
2. AC/HP SIZE — Select system size installed.
3. SYSTEM TYPE — Select system type HP-EFF.
4. AC/HP CFM ADJUST — Select NOM.
5. ON/OFF DELAY — Select 0/90 profile.
6. CONTINUOUS FAN — Select desired fan speed when
thermostat is set to continuous fan.
COMFORT OPTIONS — SUPER COMFORT HEAT AND
SUPER DEHUMIDIFY MODES
Super Comfort Heat and Super Dehumidify options are possible
when the 40FKA Fan Coil is installed with an outdoor temperature
sensor and the factory supplied Thermidistat™ Control (Comfort
Heat only; Super Dehumidify does not require an outdoor tem-
perature sensor). The following fan coil configuration is recom-
mended for maximum heating and cooling/dehumidifying com-
fort:
NOTE: The 40FKA Fan Coil provides better than average hu-
midity control and heated air temperature. This configuration will
improve the comfort provided by the heat pump system if more
humidity removal or if warmer heating air is desired. While
providing this improved comfort, the heat pump system will
operate efficiently, but not at the published ARI SEER or HSPF
efficiencies.
If the installed heat pump system uses Puron refrigerant, the fan
coil configuration below will provide excellent comfort, but DO
NOT activate the indoor control Comfort Heat configuration
option. Excessive use of the PressureGuard device could result in
its premature failure.
1. AUX HEAT KW/CFM — Select narrrowest heater range to
match size of electric heater installed (skip this step if no
heater is installed).
2. AC/HP SIZE — Select system size installed.
3. SYSTEM TYPE — Select system type HP-COMFORT (for
heat pump system) or AC (for air conditioner system).
4. AC/HP CFM ADJUST — Select LO.
5. ON/OFF DELAY — Select ENH profile.
6. CONTINUOUS FAN — Select desired fan speed when
thermostat is set to continuous fan.
7. If the fan coil is installed with Intelligent Heat Staging capable
electric heaters, remove jumper J2.
NOTE: If configuring to run Super Comfort Heat, do not remove
jumper J2 when using 5-, 8-, or 10-kw heaters.
8. Remove jumper J1 to activate dehumidify modes.
9. Wire low voltage connections for Comfort Options as shown
in Figs. 9, 10, 11, and 12.
10. Configure Thermidistat (or other Super Dehumidify/Super
Comfort Heat capable indoor control) following its installation
instructions for Super Dehumidify and Super Comfort Heat
operation.
This configuration provides the following comfort enhancements:
a. A 30 second blower on delay with 150 seconds at 70
percent airflow to allow the indoor coil to warm up or cool
down before the blower is asked to deliver 100 percent
airflow reducing the cold blow sensation at start up in
heating and allowing the indoor coil to more quickly reach
wet coil operating conditions in cooling.
b. No blower off delay eliminates cold blow which may be
associated with running the blower after shut down of the
compressor and avoids re-evaporation of condensed mois-
ture after cooling/dehumidifying operation.
c. Lower airflow while the compressor is running to reduce
draft effects and increase heating air temperature and
improved humidity control during cooling operation.
d. Intelligent Staging of the electric heater elements to more
closely match heating load requirements and provide more
consistent heating air temperatures.
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