Carrier TRANSICOLD INTEGRA 30S Operation And Service Manual Download

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5-7

62-10848

c. Release and remove belt.
d. Remove the bolts mounting the compressor.

Remove the compressor from chassis.

e. Remove the pulley from the compressor.

5.9.2

Installing Compressor

a. To install the compressor, reverse the procedure

outlined when removing the compressor. Refer
to

Section 2.6.4

for torque values.

NOTE

The service replacement compressor is sold
without flanges.

b. Pump down the compressor. (See

Section 5.4

)

c. Charge compressor. (See

Section 5.7.2

)

NOTE

It is important to check the compressor oil
level of the new compressor and fill if neces-
sary. (Refer to

Section 2.6.1

)

d. Check refrigerant cycles.

Compressor oil type

: The road compressors

are supplied with CARRIER POLYESTER
(POE) oil. Ensure compressor is marked with a
factory sticker indicating the correct oil has
been installed. Oils of PAG type are

strictly

incompatible

with the operation of this unit,

never use an oil other than that approved
by CARRIER

5.10 Checking and Replacing Filter Drier

5.10.1

Checking Filter Drier

Check for any obstruction of the filter drier by feeling
the inlet and outlet connections of the liquid line on the
filter cartridge. If the temperature of the outlet connec-
tion seems lower than the temperature of the inlet con-
nection, replace the filter drier.

5.10.2

Replacing Filter Drier

Remove refrigerant charge (See

Section 5.4

). Remove

the drier mounting clip, then replace the filter drier. Fol-
lowing drier replacement, evacuate and recharge unit
(refer to

Section 5.6

an d

Section 5.7

5.11 High Pressure (HP1) and Condenser Pres-

sure (HP2) Switches

5.11.1

Removing Switch

a. A Schrader valve is located under each switch

to allow removal and installation without remov-
ing the refrigerant charge.

b. Remove switch and test in accordance with

Section 5.11.2

c. Replace or reinstall switch.

5.11.2

Checking Pressure Switch

WARNING

Do not use a nitrogen cylinder without a
pressure regulator. (See

Figure 5.5

) Cylin-

der pressure is approximately 2350 psig
(160 bars). Do not use oxygen in or near a
refrigerant system as an explosion may
occur.

a. Remove switch as outlined in

Section 5.11.1

b. Connect ohmmeter across switch terminals. Ohm-

meter will indicate resistance if switch is closed
(HP1) or open (HP2) after relieving pressure.

c. Connect switch to a cylinder of dry nitrogen (see

Figure 5.5

d. Set nitrogen pressure regulator higher than cut-out

point on switch being tested. Pressure switch set-
tings points are provided in

Section 2.6.2

e. Close valve on cylinder and open bleed-off valve.
f. Open cylinder valve. While observing meter,

slowly close bleed-off valve and increase pres-
sure until the switch opens (HP1) or closes
(HP2). Slowly open bleed-off valve (to decrease
pressure) until switch reverts to normal position.

g. The meter will indicate open. Open pressure on

gauge. Slowly open bleed-off valve (to decrease
pressure) until switch closes (ohmmeter will move).

h. If switch does not activate within tolerances pro-

vided, replace switch. Test new switch before
installation.

Figure 5.5 Typical Setup for Testing Pressure

Switches HP1 and HP2

1. Cylinder Valve and Gauge
2. Pressure Regulator
3. Nitrogen Cylinder
4. Pressure Gauge (0 to 400 psig = 0 to 28 bars)
5. Bleed-off Valve
6. 1/4 inch connection