Carrier 48TJD Specifications download pdf (Page 40)

10. Ensure surfaces are not allowed to &y before rinsing.

Reapplying cleaner as needed to ensure 10-minute satura-

tion is achieved.

11. Thoroughly rinse _dl surfaces with low velocity clean

water using downward rinsing motion of water spray

nozzle. Protect tins from &_mage from the spray nozzle.

CONDENSATE DRAIN- Check and clean each year at

sttut of cooling season. In wintel, keep &ains and traps dry.

During periods of low outdoor temperatures, add anti-freeze

solution to the drain to prevent freeze up. Follow _dl precau-

tions on anti-freeze labeling.

FILTERS -- Clean or replace at start of each heating and cool-

ing season, or more often if operating conditions require. Refer

to Table 1 for type and size.

OUTDOOR-AIR INLET SCREENS -- Clean screens with

steam or hot water and a mild detergent. Do not use throwaway

filteL's in place of screens. See Table 1 for quantity and size.

MAIN BURNER -- At the beginning of each heating season,

inspect for deterioration or blockage due to corrosion or other

causes. Observe the main burner flames. Refer to Main Burn-

eLs section on 43.

FLUE GAS PASSAGEWAYS -- The flue collector box and

heat exchanger cells may be inspected by removing heat ex-

changer access panel (see Fig. 4 and 5), flue box cover, and

main burner assembly. Refer to Main Burners section on

page 43 for burner removal sequence. If cleaning is required,

remove heat exchanger baffles and clean tubes with a wire

brush.

Use caution with ceramic heat exchanger baffles. When in-

st_dling retaining clip, be sure the center leg of the clip extends

inward toward baffle. See Fig. 49.

CERAMIC

BAFFLE

CLIP_

HEAT EXCHANGER

TUBES

NOTE: One baffle and clip will be in each upper tube of the heat

exchanger.

Fig. 49 -- Removing Heat Exchanger Ceramic

Baffles and Clips

COMBUSTION-AIR BLOWER -- Clean periodically to as-

sure proper airflow and heating efficiency. Inspect blower

wheel evely fall and periodically during heating season. For the

fiLst heating season, inspect blower wheel bi-monthly to deter-

mine proper cleaning frequency.

To inspect blower wheel, remove heat exchanger access

panel. Shine a flashlight into opening to inspect wheel. If clean-

ing is required, remove motor and wheel assembly by remov-

ing screws holding motor mounting plate to top of combustion

fan housing. The motor and wheel assembly will slide up and

out of the fan housing. Remove the blower wheel from the mo-

tor shaft and clean with a detergent or solvent. Replace motor

and wheel assembly.

Lubrication

COMPRESSORS- Each compressor is ch_uged with the

correct amount of oil at the factory. Conventional white oil

(Sontext 200LT) is used. White oil is compatible with 3GS oil,

and 3GS oil may be used if the addition of oil is required. See

compressor nameplate for origimd oil charge. A complete re-

ch_uge should be four ounces less than the origimd oil charge.

When a compressor is exchanged in the field it is possible that

a major portion of the oil from the replaced compressor may

still be in the system. While this will not affect the reliability of

the replacement compressor, the extra oil will add rotor drag

and increase power usage. To remove this excess oil, an access

valve may be added to the lower portion of the suction line at

the inlet of the compressol: The compressor should then be mn

for 10 minutes, shut down, and the access valve opened until

no oil flows. This should be repeated twice to make sure the

proper oil level has been achieved.

FAN SHAFT BEARINGS -- For size 016 units, bearings are

permanently lubricated. No field lubrication is required. For

size 020-028 units, lubricate bearings at least every 6 months

with suitable bearing grease. Extended grease line is provided

for far side fan bearing (opposite drive side). Typical lubricants

are given below:

MANUFACTURER LUBRICANT

Texaco Regal AFB-2*

Mobil Mobilplex EP No. 1

Sunoco Prestige 42

Texaco Multifak 2

*Preferred lubricant because it contains rust and oxidation inhibitors.

CONDENSER AND EVAPORATOR-FAN MOTOR

BEARINGS -- The condenser-fan and evaporator-fan motors

have permanently sealed bearings, so no field lubrication is

necessaq.

Evaporator Fan Performance Adjustment

(Fig. 50-52) -- Fan motor pulleys are factory set for speed

shown in Table 1.

To change fan speeds:

1. Shut off unit power supply.

2. a. Size 016 Only: Loosen belt by loosening carriage

nuts holding motor mount assembly to fan scroll

side plates (A and B).

b. Size 020-028 Only: Loosen nuts on the 2 carriage

bolts in the motor mounting base. Install jacking

bolt and plate under motor base (bolt and plate are

shipped in installer's packet). Using bolt and plate,

raise motor to top of slide and remove belt. Secure

motor in this position by tightening the nuts on the

carriage bolts.

3. Loosen movable-pulley flange setscrew (see Fig. 50).

4. Screw movable flange toward fixed flange to increase

speed and away from fixed flange to decrease speed. In-

creasing fan speed increases load on motor Do not ex-

ceed maximum speed specified in Table 1.

See Table 20 for air quantity limits.

5. Set movable flange at netuest keyway of pulley hub and

tighten setscrew. (See Table 1 for speed change for each

full turn of pulley flange.)

6. Replace and tighten belts. See Belt Tension Adjustment

section on page 42.

To align fan and motor pulleys:

1. Loosen fan pulley setscrews.

2. Slide fan pulley _dong fan shaft.

3. Make angular alignment by loosening motor from

mounting plate.

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 55 56

Comments to this Manuals

No comments

Carrier 48TJD Specifications Page 40

Comments to this Manuals

Related products and manuals for Split-system air conditioners Carrier 48TJD