Figure 4-1 Cooling Circuit; Servicing Engine Related Components - Carrier SUPRA 850Mt Operation And Service Manual

4.3 SERVICING ENGINE RELATED
COMPONENTS
4.3.1 Cooling system
The condenser and radiator assembly is designed
with the radiator located after the condenser coil. The
condenser fans draw the air through the condenser and
radiator coil.
1. Cleaning the cooling system
The condenser and radiator can be cleaned at the
same time. The radiator must be cleaned internally as
well as externally to maintain adequate cooling.
Remove all foreign
radiator/condenser coil by reversing the normal air flow.
(Air is pulled in throughthe front and discharges over the
standby motor.) Compressed air or water may be used
as a cleaning agent.
WARNING
Do not use high pressure water spray
to avoid damaging condenser fins.
WTS
(microprocessor)
Coolant pump
material from the
Thermostat
Coolant outlet
(hot side)
Coolant inlet
(cold inside)
Over flow

Figure 4-1 Cooling circuit

4-3
2. Replace coolant
a. Drain coolant by removing lower radiator hose and
radiator cap.
b. Install hose and fill system with clean, untreated
water to which any proprietary radiator cleaner
should be added (six ounces - - dry 151 grams to one
gallon = 3.78 liters) of water.
c. Run engine for thetime reccomended by thecleaner
product used and drain system while warm. Rinse
system three times after it has cooled down. Refill
system with water.
d. Run engine to operating temperature. Drain system
again and fill with treated water/anti-freeze. (see
Caution and refer to section 1.2) NEVER POUR
COLD WATER INTO A HOT ENGINE, however hot
water can always be added to a cold engine.
3. Checking radiator operation
a. Check visually the cooling system (specially hose
between radiator and coolant bottle).
b. Verify coolant level inside the radiator and top up if
necessary.
c. Power up the unit.
d. Run engine to operating temperature until coolant
level in coolant bottle increases (flow from the
radiator to the coolant bottle).
e. Stop theunitand verify that coolant decreases inside
the coolant bottle (flow from the coolant bottle to the
radiator).
Pressure cap
Coolant bottle
62--611XX- -20 (03/04)