MAN-KACE-A-E-001
2
ted at the factory for a condensing pressure of 1400 kPa
"gauge" (205 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
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 pressurizing 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.
SUPPLY DUCTING
Flanges around the blower opening are intended for a
flexible supply air duct connection to unit.
Be certain
blower wheel turns freely
before making the duct
connection. Supply air ductwork must be insulated with 25
or 38 mm thick (1" or 1 1/2") fibreglass, sealed at all joints
and must have an exterior vapour barrier. The air
conditioner's life expectancy and efficient performance are
dependent on adequate air flow. Under no circumstance
should the unit be installed where the total external static
pressure exceed those shown in the Table 1.
TABLE 1
MODEL EXTERNAL STATIC PRESSURE
Pa
inch wg
009
75
0.30
012
75
0.30
015
75
0.30
018
75
0.30
024
188
0.75
030
188
0.75
036
188
0.75
042
188
0.75
048
188
0.75
060
188
0.75
072
25 to 275
0.10 to 1.1
096
25 to 275
0.10 to 1.1
120
25 to 275
0.10 to 1.1
144
25 to 275
0.10 to 1.1
WIRING - LINE VOLTAGE
Check mainpower 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 electrical 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 pres-sure by a
pressure limiting control. If the pressure rises above 560 psi
(2,758 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 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.
