ThermoPlus Air KACSE 012 TO 144 Series User manual

1
WATER COOLED SPLIT
AIR CONDITIONERS
INSTALLATION, OPERATION AND MAINTENANCE
SERIES
Each split air conditioner has been checked out prior
to shipment. Failure to operate after installation
indicates damage in transit or improper installation.
INSPECTION
Check packaging during unloading. Note transit
damage on all copies of bill of lading. Inspect air
conditioners for hidden shipping damage after
packaging is removed. Transit damage claims must
be filed promptly with freight company by purchaser.
HANDLING
Always handle units flat on their base. Moving or
placing a horizontal unit on end, or dropping it may
damage internal parts and displace oil from the
compressor's crankcase.
STORAGE
If jobsite storage is necessary, place the unit in a
clean, warm dry area. Follow instructions under
Handling.
LOCATION
Note that units with different capacities may have
identical dimensions. Labels on unit packaging must
be carefully scrutinised and matched to job location.
These units are not approved for outdoor installation
and therefore must be installed inside the space
being conditioned.
PLACEMENT
Install split air conditioners in a level plane and locate
unit around the service panel to ensure that proper
access is available.
WIRING
All wiring should conform to the CEC and/or local
code requirements. Power disconnect shall be field
provided (by others). The wiring diagram is located on
electrical box cover on vertical models and on the
back of the service panel on horizontal models. Make
certain the line voltage and the 24 volt control circuit
are properly identified and wired in accordance with
the unit wiring diagram.
 Water cooled air conditioners are classified as
direct (permanently) connected devices by the
CEC. Split air conditioners must be properly
grounded as per instructions on the unit wiring
diagram.
Connecting to Evaporator:
Evaporator must be sized according to the
Condensing unit capacity. Fan interlock must be
installed according to local codes & supplied wiring
diagram.
Proper vacuum must be performed and system
charged with enough refrigerant (R410A) to maintain
48°F suction & 105°F condensing temperature in an
80/67°F environment
WATER SUPPLY (UNIT CONNECTED ON OPEN
WATER CIRCUIT)
The source of water for split air conditioner operation
is the responsibility of the owner and/or the installing
contractor. The split air conditioner must not
function without water, and predetermined rates of
flow (l/s or USGPM) must be maintained for the unit
to opera-te at rated capacity. Since the water function
is to absorb heat from the refrigerant, the flow rate for
each model varies with the entering water
temperature (EWT). A pressure-operated water valve
is installed for this reason inside the unit and SAE-13
calibrated at the factory for a condensing pressure of
2816 kPa "gauge" (336 PSIG.). Piping size to and
from unit must match or exceed the inlet and outlet
water connection sizes on the air conditioner.
WATER CONNECTIONS
If flexible hoses are used to make the water in-out
connections to the unit, certain precautions must be
taken to ensure proper unit operation and avoid hose
damage.
 Never use a hose of a smaller inside diameter
than that of the water connection sizes on the
unit.
 The hoses must be rated to match or exceed

MAN-KACS-001E
2
temperatures and pressures which occur during
normal operation of system (temperature between
4o C (40o F) and 43o C (110o 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 10-12o C (18-22o
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 6o C (10o 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