MAN-KACS-001E
2
temperatures and pressures which occur during
normal operation of system (temperature between
4
o
C (40
o
F) and 43
o
C (110
o
F); and pressures up
to 1380 kPa (200 PSI).
When hoses are connected they must not be
subjected to any stress in tension or by twisting or
kinking.
Hoses available as an accessory to the unit are
provided with hexagonal surfaces on the fittings
as are the water fittings on units. Use a properly
sized wrench on the hexagonal surface to tighten
connections.
Never use
a wrench on the hose or
sleeve that crimps the fitting into the hose.
Do not over-tighten connections
. Turn in the
mating threads by hand or with a wrench until
snug, then tighten with a wrench beyond the point
just enough to seal the joint (for tapered pipe
threads this would be an additional 1/2 to one full
turn; for union or flare connections no more than
1/4 of a turn).
Before pressurising the system, closely inspect
the hose and fittings to be sure there are no cuts,
abrasions, twists or kinks. Hoses must not be in
contact with any sharp edge while in use.
Hose supplier will not take responsibility for hose
leakage, failure or damage resulting from water
leaks.
WIRING - LINE VOLTAGE
Check main power voltage. Refer to unit wiring
diagram and make changes (if required) to permit the
unit to operate on the available supply voltage.
Connect power as per the unit wiring diagram,
conforming to the local and national electrical code
requirements.
CONNECTION AND LOCATION OF THERMOSTAT
Wiring the thermostat to the unit should be done as
per the wiring diagram (inside the panel of the electri-
cal box on the vertical units and on the inside of the
service panel for horizontal units). Thermostat must
be absolutely level when installed and located to best
sense the actual room temperature. Avoid false
sensing heat or cold from sunlight, open doors or
window drafts, supply air outlets, fireplaces, ovens,
etc.
HIGH PRESSURE PROTECTION
Your unit is protected against excessive high
pressure by a pressure limiting control. If the pressure
rises above 500 psi (3447 kPa), the pressure switch
will shut down the unit.
RESET UNIT
To restart,
the unit must
be turned "OFF" at the
thermostat or at the main power switch. Then switch
to "ON" position; the unit will start functioning. If not,
call a technician to solve the problem. Repeated
resetting on unit without getting the fault corrected will
cause compressor failure.
START UP INSTRUCTIONS
After installation of unit and the ductwork, water
and condensate connections, the wiring in
accordance with preceding instructions, the unit is
ready for start-up. Check all wire connections to
the unit and to external control devices for
tightness.
Set temperature on the thermostat below room
temperature and start the unit. After operating for
five(5) minutes, air supply should have a
minimum temperature drop of 10-12
o
C (18-22
o
F). Use a surface temperature device or any other
device to check the temperature of supply water
and return water. The
minimum temperature
rise
should be 6
o
C (10
o
F).
If the above conditions are not met, one or more
of the following problems exist: low air flow, low
water flow, or unit is possibly defective.
MAINTENANCE AND SERVICE
Do not operate the split air conditioner without the
air filter in place. Filters should be serviced
regularly,
at least every three months
.
Dirty filters will result in inefficient performance.
Check the air coil and fan wheel yearly for
cleanliness and clean if necessary.
NOTICE
Hot gas by pass
To be adjusted to 55 psi
