Blue Bird TC/2000 Owner's Manual download pdf (Page 39)

HEATER DEFROSTER LOCATION

The blower in the front main heater contributes to keeping the driver’s area glass clear of fog and frost.

See OUTLET LOCATION diagram. Defrosting performance is enhanced greatly by the use of fresh air into

the heater. Open front access panel and observe fresh air intake on driver's side of bus to verify the proper

functioning of the fresh air intake.

Satisfactory performance of the body heaters is basically dependent upon:

1. Adequate engine (coolant) temperature - this can be altered by thermostat rating, which should never

be higher than recommended by the engine manufacturer and/or shutters.

2. Adequate coolant flow - this varies with engine speed and can be increased if necessary by the use of

an auxiliary water pump. The heaters are rated at six gallons per minute.

3. Proper fan operation - the three speed motor can most easily be checked for function by operating the

motor switch and listening for the speed variations.

Many other factors affect performance, but the three mentioned are most basic.

DEFROSTER FAN LOCATIONS

Opt. 0525 - On the TC/2000 with deluxe door control and standard manual control, the fan is mounted on the

door control bracket. With power door controls, the fan is mounted on the dash cover.

Opt. 0530 - One fan is installed per conditions outlined in Option 0525 for the lefthand fan. The other fan is

mounted on the dash cover.

Opt. 0532 - Fan is located on the upper inner panel in the center.

Opt. 0535 - Fan is located on the upper inner panel 6" to the left of center.

Opt. 0541 - Defroster fan is located on the dash cover.

DRIVER/PASSENGER COMFORT

When defrosting requirements have been satisfied, the other openings can be set as necessary for comfort.

The adjustable outlets on the rear surface of the dash can be directed toward the driver and/or passengers as

desired. The auxiliary unit under the driver’s seat has a two-speed electrical switch and it directs air upward

for the driver’s left side and forward around the steering column area.

HEATER BLEEDING INSTRUCTIONS

Use of antifreeze (ethylene glycol type only) is recommended for summer or winter operation because of

its corrosion inhibition and lubrication properties. A 50-50 solution of antifreeze and water is preferred and it

gives freeze protection to about 30 degrees F below zero. Ultimate protection is attained at 68% antifreeze

(about 92 degrees F below zero); a higher concentration of antifreeze should never be used.

If it becomes necessary to completely refill the chassis coolant system, the following procedure must be

followed to insure adequate heater bleeding. During the bleeding process, it will be necessary to remove the

radiator cap and refill cooling system several times to insure adequate coolant is available to replace purged

air and coolant lost when bleeding.

WARNING: Extreme care must be used when removing radiator cap. As coolant becomes hot, pressure is

built up in the cooling system. Rapid venting and/or removal of radiator cap will cause coolant to boil up

and spray out and can result in serious burns. Slowly vent off pressure before removing radiator cap.

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Blue Bird TC/2000 Owner's Manual Page 39