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LEGEND
FLA
— Full Load Amps
LRA
— Locked Rotor Amps
MCA
-- Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
RLA
— Rated Load Amps
NO TES:
1. In compliance with NEC (National Electrical Code) requirements
for multimotor and combination load equipment (refer to NE C
Articles 430 and 440), the overcurrent protective device for the
unit shall be Power
Supply fuse. The CGA (Canadian Gas
Association) units may be fuse or circuit break er.
2. Minimum wire size is based on 60 C copper wire. I f other than
60 C wire is used, or if length exceeds wire length in table,
determine siz e from NEC.
.
3. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply volt-
age is greater than 2%. Use the following formula to determine
the percentage of voltage imbalance .
% Voltage imbalance
max voltage deviation from average voltage
= 100 x
average voltage
Heater capacity (kW) based on heater voltage of 208v & 240v.
*
If power distibution voltage to unit varies from rated heater
voltage, heater kW will vary accordingly.
(2.) HP-COMFORT—Heat Pump Comfort provides ap-
proximately 315 CFM per ton for higher normal
heating air delivery temperature and provides ap-
proximately 350 CFM per ton cooling airflow for
good humidity removal.
(3.) HP-EFF (Factory Selected for 604B)— Heat Pump
Efficiency provides same airflow for heating and
cooling modes to increase overall HP efficiency;
approximately 350 CFM per ton.
d. AC/HP CFM ADJUST—SELECT NOMINAL, LOW,
OR HIGH AIRFLOW
The AC/HP CFM Adjust select is factory set to the
High-Hi (NOM for 060) tap. The CFM Adjust selections
NOM/LO will regulate airflow supplied for all opera-
tional modes, except non-heat pump heating modes. HI
provides 15 percent airflow over nominal unit size
selected and LO provides 10 percent airflow below
nominal unit size selected. CFM Adjust selection op-
tions are provided to adjust airflow supplied to meet
individual installation needs for such things as noise,
comfort, and humidity removal (See Fig. 20, D as
indicated).
e. ON/OFF DELAY—SELECT DESIRED
TIME DELAY PROFILE
Four motor operation delay profiles are provided to
customize and enhance system operation (See Fig. 20, E
as indicated).
Selection options are:
(1.) The standard 90 sec off delay (Factory Setting) at
100 percent airflow in cooling or heat pump heating
mode.
(2.) A 30 sec cooling 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 in
cooling or heat pump heating mode.
EXAMPLE: Supply voltage is 230-3-60.
®
Determine maximum deviation from average voltage.
(AB) 229 -
(BC) 231 -
(AC) 229 -
Maximum deviation is 2 v.
Determine percent of voltage imbalance .
% Voltage Imbalance = 100 x
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
IMPORTANT: If the supply voltage phase imbalance is
more than 2%, contact your local electric utility company
immediately.
Fig. 13—Electrical Data Legend
—12—
AB = 228 v
BC = 231 v
AC = 227 v
Average Voltage =
228 = 1 v
229 = 2 v
227 = 2 v
2
229
= 0.8%
(3.) A no delay option used for servicing unit or when a
thermostat is utilized to perform delay functions.
(4.) ENH, enhanced selection, provides a 30 sec cooling
on delay with no airflow, plus 150 sec at 70 percent
airflow and no off delay for added comfort.
This will minimize cold blow in heat pump opera-
tion and could enhance system efficiency.
f. CONTINUOUS
FAN—SELECT
SPEED WHEN THERMOSTAT IS SET ON CON-
TINUOUS 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 to HI, 100 percent
cooling mode airflow (See Fig. 20, F as indicated).
g. LOW-VOLTAGE CIRCUIT FUSING AND REFER-
ENCE
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.
h. BASIC UNIT CONFIGURATION
The following basic configuration of the indoor motor
will provide ARI rated performance of the System. This
BASIC CONFIGURATION should be used when the
rated ARI performance is required, or if system enhance-
ments such as super dehumidify are not needed.
(1.) AUX HEAT kW/CFM-Select the heater range for
the size of electric heater installed (skip this step if
no heater is installed).
(2.) AC/HP SIZE-Factory selected to match system size
installed, please verify.
228 + 231 + 227
3
686
=
3
= 229
C03014
DESIRED
FAN
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