Cooling System; Cleaning And Flushing; Radiator Replacement; Figure 8−15 Condenser And Radiator Assemblies - Carrier VECTOR 6500 Operation & Service Manual

8.5.12 Cooling System

a. Cleaning and Flushing
Air flows through the condenser and then the radiator.
The cooling surfaces of both must be clean and the
interior of the radiator must be clean for adequate
cooling.
CAUTION
Use only ethylene glycol anti-freeze (with
inhibitors) in system as glycol by itself will
damage the cooling system. Always add
pre-mixed 50/50 anti-freeze and water to ra-
diator/engine. Never exceed more than a
60% concentration of anti-freeze. Use a low
silicate anti-freeze meeting specification
GM 6038M for standard life coolant or use
Texaco Havoline extended life coolant or
any other extended life coolant which is
Dexcool approved and has 5/150 (5
years/150,000 miles) on the label.
1. Ensure the unit will not start automatically by dis-
abling any two way communication and placing the
Main Power switch in the OFF position. Disconnect
the high voltage source and lockout/tagout the re-
ceptacle.
2. Remove all foreign material from the condenser coil and
radiator by reversing the normal air flow. (Air is pulled in
through the front and discharges over the engine.)
Compressed air or water may be used as a cleaning
agent.
WARNING
Do not remove the cap from a hot radiator or
bottle; if the cap must be removed, do so
very slowly in order to release the pressure
without spray.
NOTE
Draining the coolant from the engine petcock
will leave approximately 1 quart (.9 liters) of
coolant in the block.
3. Drain coolant completely by removing radiator cap
and then the lower radiator hose.
CAUTION
NEVER POUR COLD WATER INTO A HOT
ENGINE, however hot water can always be
added to a cold engine.
4. Install hose and fill system with clean, untreated wa-
ter.
Only clean water should be used to flush the
cooling system. Do not use any radiator flush or
detergents to clean the radiator.
5. Start the engine and drain system while warm. Rinse
system three times after it has cooled down. Refill
system with water.
6. Run engine to operating temperature. Drain system
again and fill with 50/50 water/anti-freeze mixture.
(see Caution Note at the beginning of this section.)
b. Radiator Replacement
1. Ensure the unit will not start automatically by dis-
abling any two way communication and placing the
Main Power switch in the OFF position. Disconnect
the high voltage source and lockout/tagout the re-
ceptacle.
2. Drain coolant completely by removing radiator cap
and then the lower radiator hose.
3. Remove condenser fans, refer to Section 8.9.7.
When removing the road side fan assembly, remove
the condenser to subcooler line support bracket com-
pletely, to allow clearance for coil removal.
4. Remove the radiator frame assembly mounting bolts
(see Figure 8−15) and and remove the radiator frame
assembly.
5. Remove top radiator mounting brackets and remove
the radiator through the top of the unit.
6. Re-assemble in reverse order of removal.
7. Flush and fill radiator with coolant. (Refer to section
8.5.12.)
2
1
5
Condenser coil not shown, for clarity
1. Radiator Frame Assembly
2. Radiator Mounting Bracket
3. Radiator
4. Condenser Frame Assembly
5. Radiator Frame Mounting Bolts
Figure 8−15 Condenser And Radiator Assemblies
8−13
NOTE
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