Carrier 30GTR Specifications download pdf (Page 55)

Tightening Cooler Head Bolts

Gasket Preparation — When reassembling cooler heads, al-

ways use new gaskets. Gaskets are neoprene-based and are

brushed with a light ﬁlm of compressor oil. Do not soak gas-

ket or gasket deterioration will result. Use new gaskets within

30 minutes to prevent deterioration. Reassemble cooler nozzle

end or plain end cover of the cooler with the gaskets. Torque

all cooler bolts to the following speciﬁcation and sequence:

⁄

-in. Diameter Perimeter Bolts ......150to170ft-lb

(201 to 228 N-m)

⁄

-in. Diameter Flange Bolts ..........70to90ft-lb

(94 to 121 N-m)

1. Install all bolts ﬁnger tight.

2. Bolt tightening sequence is outlined in Fig. 25. Follow

the numbering or lettering sequence so that pressure is

evenly applied to gasket.

3. Apply torque in one-third steps until required torque is

reached. Load all bolts to each one-third step before pro-

ceeding to next one-third step.

4. No less than one hour later, retighten all bolts to required

torque values.

5. After refrigerant is restored to system, check for refrig-

erant leaks with soap solution or Halide device.

6. Replace cooler insulation.

Condenser Coils

COIL CLEANING — Clean coils with a vacuum cleaner,

fresh water, compressed air, or a bristle brush (not wire). Units

installed in corrosive environments should have coil clean-

ing as part of a planned maintenance schedule. In this type

of application, all accumulations of dirt should be cleaned

off the coil.

Do not use high-pressure water or air to clean coils —

ﬁn damage may result.

Condenser Fans — Each fan is supported by a formed

wire mount bolted to fan deck and covered with a wire guard.

The exposed end of fan motor shaft is protected from weather

by grease. If fan motor must be removed for service or

replacement, be sure to regrease fan shaft and reinstall fan

guard. For proper performance, fan should be positioned as

in Fig. 26A and 26B (standard and low-noise applications).

Tighten setscrews to 15 6 1 ft-lb (20 6 1.3 N-m).

If the unit is equipped with the high-static fan option, the

fan must be set from the top of the fan deck to the plastic

ring or center of the fan to a distance of 2.13 in. 6 0.12 in.

(54 6 3 mm). This is different from standard fans, since there

is no area available to measure from the top of the oriﬁce

ring to the fan hub itself. See Fig. 27.

IMPORTANT: Check for proper fan rotation (clock-

wise viewed from above). If necessary, switch any 2

power leads to reverse fan rotation.

SIZES 080,090* WITH 18-BOLT HEADS

SIZES 080,090* WITH 14-BOLT HEADS

SIZES 100,110* WITH 22-BOLT HEADS

SIZES 100,110* WITH 16-BOLT HEADS

SIZES 130,150*

SIZES 170,190*

SIZE 210*

*And associated modular units.

Fig. 25 — Cooler Head Bolt Tightening Sequence (Typical Tube Sheet)

1 2 ... 50 51 52 53 54 55 56 57 58 59 60 ... 83 84

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Carrier 30GTR Specifications Page 55

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