Operating instructions

26
1B. AC VOLTAGE
The unit is a 115V AC, 60 Hz. appliance. The proper operation
range is between 103 volts and 126.5 volts. The voltage
reading should be taken at the unit power supply leads. One
test should be performed when the unit is turned OFF and
another with it under a load. If the voltage is not within the
proper operating range, it must be corrected before operating
the heat pump.
THIS IS AN ENERGIZED CIRCUIT. SHOCK CAN
OCCUR IF NOT TESTED PROPERLY. TESTING TO
BE DONE BY A QUALIFIED SERVICE TECHNI-
CIAN.
Check for proper AC volts at the connections at the unit's
electronic control box on roof mounted units and at the
connections at the electric box on basement units.
The dual units (Models 39224 and 39424) have two AC volt
circuits to them. Verify that Circuit 1 is wired into CIR 1 terminal
block, and Circuit 2 is wired into CIR 2 terminal block. Check
for proper AC volts at each terminal block.
NOTE: Models 39046.601 and 39115.616 are 50/60 Hz. units.
On 50 Hz. power, 100 volts, the operating range is 90 to 110
volts.
2B. DC VOLT REQUIREMENTS
DC VOLTS
On certain models of electronic control air conditioners, a DC
volt supply is wired to the control board. The operating range
is 10 to 16 volts. If voltage is below 10 volts, you could
experience improper operation of the components within the
main board.
On models 391XX.XXX, a Dc volt supply is supplied to the
thermostat location: Positive (+) DC volt wires to R terminals on
the thermostat; and negative (–) DC volt wires to the black wire
from the unit. Polarity is crucial for proper operation.
The operating range is 10 to 16 volts DC.
3B. BREAKER
MAKE SURE THAT THE POWER SUPPLY TO THE
UNIT IS DISCONNECTED BEFORE PERFORMING
ANY WORK ON THE UNIT TO AVOID THE POSSI-
BILITY OF SHOCK INJURY OR DAMAGE TO THE
EQUIPMENT.
The unit circuit is to be protected by a time delay fuse or HACR
(heating, air conditioner, refrigerator) breaker. By taking an
amp reading at the unit AC voltage supply line, you can
determine if the breaker is tripping prematurely. Place a
clamp-on type ammeter around the black wire from the
breaker going to the unit. Turn on the unit and record amp
draw. If the breaker trips before the rated amperage, replace
amperage, replace the breaker.
4B. WIRING
MAKE SURE THAT THE POWER SUPPLY TO THE
UNIT IS DISCONNECTED BEFORE PERFORMING
ANY WORK ON THE UNIT TO AVOID THE POSSI-
BILITY OF SHOCK INJURY OR DAMAGE TO THE
EQUIPMENT.
With the line circuit breaker turned OFF, check to see if the unit
is wired correctly. Each unit is supplied with a wiring diagram.
Check all wires for proper location and tight connections. If you
have difficulty in reading wiring diagrams or schematics,
please enroll in an electricity course at your local school or
college.
MODELS CIRCUIT PROTECTION
39125 (Basement) 15 amp T.D. Fuse or 15 amp HACR Breaker
39325 (Basement) 20 amp T.D. Fuse or 20 amp HACR Breaker
39224 (Basement) Circuit 1 15 amp T.D. Fuse or 15 amp HACR Breaker
Circuit 2 15 amp T.D. Fuse or 15 amp HACR Breaker
39424 (Basement) Circuit 1 15 amp T.D. Fuse or 15 amp HACR Breaker
Circuit 2 15 amp T.D. Fuse or 15 amp HACR Breaker
All Rooftop Units 20 amp T.D. Fuse or 20 amp HACR Breaker
SECTION B. AC VOLTAGE REQUIREMENTS