MVE Biological Systems
TEC 3000 Operating and Maintenance Freezer Manual
13289499 Rev H •
119
2. Remove coil retaining clip by inserting a flathead screwdriver between the clip and the edge
of the coil body. Twist the screwdriver, and the clip should slide off
3. Remove and discard the coil assembly
4. Using a crescent wrench loosen hex nut and remove the plunger housing. Remove plunger
housing and plunger assembly. Discard these parts
5. Remove any debris that may have collected in brass valve body
6. Inspect the brass valve body of the solenoid valve for nicks or damage. If the sealing
surface appears to be in good condition, the valve body may be reused. If the sealing
surface is damaged, the plumbing will need to be disassembled and the entire body will
need to be replaced (this is not common).
7. Disassemble a new SMC valve (PN 14224611S) using the above procedure
8. Install the new plunger, plunger housing, and coil assembly onto the old valve body.
9. Assembly valve with new components in the reverse order.
10. Verify that no leaks are present using leak detect solution
11.
Open the LN2 supply valve and initiate a fill cycle by pressing “Fill Start’. Allow the fill cycle
to complete and verify that flow stops at the termination of the fill cycle.
NOTE: If the brass valve body requires replacing, the freezer plumbing will need to
be disassembled and the entire valve replaced (PN 14224611S). It is typically
easier to start disassembling the plumbing assembly beginning at the fill tee for fill
valve replacement or the gas bypass muffler for gas bypass valve replacement.
NOTE: When installing a complete new valve, ensure it is oriented correctly. An
“N” is engraved on the side of the SMC brass valve body. The valve should be
installed so
that this “N” is on the inlet side of the valve.
NOTE: If an older style solenoid requires replacing, the freezer plumbing will need to be
disassembled and the entire valve replaced by the current production SMC solenoid valve
(PN 14224611S). It is typically easier to start disassembling the plumbing assembly
beginning at the fill tee for fill valve replacement or the gas bypass muffler for gas bypass
valve replacement.
Coil retaining clip
Coil assembly
Plunger housing
Plunger assembly and PTFE seal
Hex nut
Brass valve body
Содержание MVE 1842P-150
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