1.
AC
– Air Conditioner provides approximately 400
CFM per ton for greater efficiency and humidity
control with the AC/HP CFM ADJUST set to the
nominal (NOM) tap. To achieve more or less than
400 CFM per ton, move tap to (HI) or (LO) position
respectively. Refer to appropriate airflow tables for
exact CFM setting.
2.
HP
-COMFORT – Heat Pump Comfort provides ap-
proximately 350 CFM per ton for higher than normal
heating air delivery temperature.
3.
HP
-EFF – Heat Pump Efficiency provides same
airflow for heating and cooling modes to increase
overall HP efficiency; approximately 400 CFM per
ton with the AC/HP CFM ADJUST set to the nomi-
nal (NOM) tap.
The factory setting is AC (Refer to Figure 10 and Figure
16).
2.6.4
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.
HI provides 10% airflow over nominal unit size selected
and LO provides 10% airflow below nominal unit size se-
lected.
Setting options are provided to adjust airflow supplied
to meet individual installation needs for such things as
noise, comfort, and humidity removal. (Refer to Figure
10 and Figure 16).
2.6.5
ON/OFF delay
Select desired time delay profile
NOTE:
Delay selections are active in cooling and heat
pump heating modes only. Electric heating modes have
a one (1) minute OFF delay at 50% airflow and zero (0)
ON delay programmed into the ECM motor that cannot
be overridden.
Four (4) motor operation delay profiles are pro-
vided to customize and enhance system operation. (Re-
fer to Figure 10 and Figure 16).
Selection options are:
1.
0/90
: No ON delay and 90 second OFF delay at
100% airflow (factory setting).
2.
30/90
: 30 second ON delay with no airflow and 90
second OFF delay at 100% airflow profile. Used
when it is desirable to allow system coils time to
heat-up/cool-down in conjunction with the airflow.
3.
0/0
: No delay option. Used for servicing unit or
when a thermostat is utilized to perform delay func-
tions.
4.
ENH
: enhanced selection provides a 30 second ON
delay with no airflow followed by 150 seconds at
70% airflow, and no OFF delay for added comfort.
This profile will minimize cold blow in heat pump
operation and could enhance system efficiency.
2.6.6
Continuous fan
NOTE:
If installed with a two-stage outdoor unit, do not
select HI speed continuous fan. If HI is selected, low
stage compression will also run HI fan speed possibly
resulting in insufficient dehumidification.
Select desired fan speed when thermostat is
set on continuous fan. (Refer to Figure 10 and Figure
16)
1.
LO speed
– factory setting, 50% cooling mode air-
flow.
2.
MED speed
– move connector to MED, 80% cool-
ing mode airflow.
3.
HI speed
– move connector to HI, 100% cooling
mode airflow.
2.6.7
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 trans-
former 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.
2.6.8
Basic furnace configuration
The following basic configuration of the furnace will pro-
vide ARI rated performance of an air conditioner:
1.
HEAT KW/CFM
– Select the heater range for the
size electric heater installed.
2.
AC/HP SIZE
– Select system size installed.
3.
SYSTEM TYP
E – Select system type AC
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.
The following basic configuration of the furnace will pro-
vide ARI rated performance of a heat pump:
1.
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.
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