Ingersoll-Rand 900829, Руководство по обслуживанию

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Refrigeration Service Operations
52
5. The suction pressure should fall because the
suction bypass solenoid closes when the
frozen compartment shifts to Cool.
6. Check the temperatures of the refrigeration
lines on both sides of the suction bypass
solenoid by hand. A temperature difference
between the two sides of the suction bypass
solenoid indicates it is leaking.
7. Remove the gauge manifold set when finished
with the test.
Solenoid Valve Replacement
NOTE: Valves that have nylon seats must be
disassembled before soldering.
Removal
1. Recover the refrigerant charge.
2. Remove the condenser grille if necessary to
access the solenoid valve.
3. Remove the coil and disassemble the valve if
unsoldering the valve.
4. Disconnect or unsolder the refrigeration lines
from the valve and remove the valve from the
unit. Note the direction of the flow arrow on
the valve.
Installation
1. Clean the tubes for soldering if necessary.
2. Remove the coil and disassemble the valve if
soldering.
3. Place the valve in position with the flow arrow
pointing in the direction noted when removed.
4. Connect or solder the inlet and outlet
connections. After the valve cools, assemble
the valve and install the coil.
5. Pressurize the system and test for leaks.
6. Reinstall the condenser grille (if removed).
7. Evacuate and recharge the system.
Oil Separator
Removal
1. Recover the refrigerant charge.
2. Remove the condenser grille.
3. Disconnect the ORS nuts at the ends of the oil
separator.
4. Loosen the mounting hardware and remove
the oil separator.
Installation
1. Coat the new O-rings with refrigerant oil
(same type that is used in the system) and
place the new O-rings in the ORS fittings on
the ends of the oil separator.
2. Install and tighten the inlet and outlet ORS
nuts. Hold the oil separator with a backup
wrench on the hex behind the ORS fitting.
3. Pressurize the system and test for leaks.
4. Reinstall the condenser grille.
5. Evacuate and recharge the system.
Liquid Injection Metering
Orifice
Removal
1. Recover the refrigerant charge.
2. Disconnect the refrigeration line from the
metering orifice and remove the metering
orifice from the suction tube fitting.
NOTE: This orifice may become plugged
with dirt unless the refrigeration hoses are
kept clean.
Installation
1. Install the metering orifice on the suction tube
fitting.
2. Connect the refrigeration line to the metering
orifice fitting.
3. Pressurize the system and test for leaks.
4. Evacuate and recharge the system.
CAUTION: Use a heat sink to prevent
damaging the valve when soldering.
CAUTION: Use a heat sink to prevent
damaging the valve when soldering.