AIR DISCHARGE
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| FIELD POWER | ||
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| SUPPLY CONN | ||
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| 7⁄8″ DIA HOLE WITH | ||
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| 1 1⁄8″ DIA KNOCKOUT | ||
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| AND 1 3⁄8″ DIA | ||
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| KNOCKOUT | ||
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| FIELD CONTROL | ||
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| SUPPLY CONN | ||
SUCTION LINE CONN |
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| 7⁄8″ DIA HOLE | |||||||||||||||
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| LIQUID LINE CONN |
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| A93578 | |
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UNIT SIZE |
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| LIQUID TUBE | VAPOR TUBE |
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Conn Dia |
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| Tube Dia | Conn Dia | Tube Dia | |||||||||||||||||||||||||
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018, 024 |
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| 3/8 |
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| 3/8 |
| 5/8 | 5/8 |
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030, 036 |
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| 3/8 |
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| 3/8 |
| 3/4 | 3/4 |
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042, 048 |
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| 3/8 |
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| 3/8 |
| 7/8 | 7/8 |
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060 |
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| 3/8 |
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| 3/8 |
| 7/8 |
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Tube diameters are for lengths up to 50 ft. For tubing lengths greater than 50 ft, consult your local distributor.
Fig. 2ÐRefrigerant Tube Dimensions/Connections
PISTON BODY 
PISTON
PISTON RETAINER
LIQUID SERVICE
VALVE ADAPTER
FERRULE
LOCK NUT
A94030
Fig. 3ÐLiquid Service Valve Mechanical Fitting
Assembly (38YCP Model)
NOTE: A backup wrench on the hex part of the suction valve fitting is required while tightening.
The tube end must stay bottomed in the service valve during final assembly to ensure proper seating, sealing, and rigidity.
MECHANICAL FITTING REPAIR
To replace damaged ferrule or tubing, proceed as follows.
1.Attach gages to service valves.
2.Close liquid service valve and operate unit in cooling mode to pump refrigerant charge into condenser coil.
3.When suction pressure reaches 5 psig, shut unit off. Do not operate unit in a vacuum.
VALVE FITTING
FERRULE
LOCK NUT
A92120
Fig. 4ÐSuction Service Valve with Mechanical
Adapter (38YCP Model)
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| FERRULE |
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| LOCK NUT | |
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TUBING 
A92121
Fig. 5ÐLock Nut/Ferrule Positioning
4.Close suction service valve and recover refrigerant in tubing.
5.
6.Remove damaged part of tubing using tubing cutter. Repeat installation procedure previously outlined using new ferrule.
7.Evacuate tubing set and indoor coil. Check for leaks.
8.Open service valves or recharge unit. Check refrigerant charge.
LOCK NUT
TUBING
MARK ON LOCK NUT
AND TUBE
A92122
Fig. 6ÐProper Marking of Valve Assembly
2
