Carrier Transicold 69NT40-561-001, Руководство по эксплуатации и обслуживанию

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7–19 T-340
7.17.2 Installing an EEV
1. Reverse steps 1 through 4 above to install a new valve. Install valve and screen with cone of screen pointing
into liquid line at inlet to the valve.
2. During installation, make sure the EEV coil is snapped down fully, and the coil retention tab is properly seated in
one of the valve body dimples. Also, ensure that coil boot is properly fitted over valve body (see
Figure 7.11
).
Figure 7.11 Electronic Expansion Valve
3. Replace the filter drier.
4. Evacuate to 500 microns by placing vacuum pump on liquid line and suction service valve.
5. Open liquid line service valve and check refrigerant level.
6. Check superheat (see
Section 3.2 ).
7. Check unit operation by running a Pre-trip (see Section 4.8 ).
7.18 Economizer Solenoid Valve (ESV)
7.18.1 Removing a Solenoid Valve Coil:
1. Turn unit power off and remove power from the unit. Disconnect leads.
2. Remove top screw and o-ring. Remove coil and save mounting hardware, seals and spacer for reuse (see
Figure 7.12
). Refer to step d. for valve coil replacement.
Figure 7.12 Coil View of Economizer Solenoid Valve (ESV)
1) Slotted Screw
2) Top Coil (small) O-ring
3) Solenoid Coil, Enclosing Tube
and Body
4) Bottom Coil (large) O-ring
5) Brass Spacer
- - - - -
FLOW
DIRECTION
Coil
Boot
Coil
Electronic
Expansion
Valve
1
2
3
4
5