VOGT ICE TUBE-ICE P-24A, Service Manual

Page: 107 / 146

P24A & P34A Service Manual
SERVICING OPERATIONS
12/18/12
9-21
Circulating Water Pump Motor
. The motor bearings are prelubricated and sealed. They require
no further lubrication. The pump should operate with the water level above the impeller housing.
The pump is equipped with a mechanical seal, which is self-adjusting and requires no lubrication.
However, the pump should not be operated unless circulating water. The pump manufacturer
recommends that a mechanical seal be kept as a spare. When ordering a seal, specify pump size,
type, serial number, and manufacturer’s name as indicated on the nameplate.
Solenoid Valves
. The P24 and P34 are equipped with several solenoid valves to perform various
functions for proper operation and good ice production.
The Thaw Gas Solenoid Valve
(18), Figure 9-7, is opened during the thaw cycle to allow warm gas
to pass from the receiver to the freezer. Repair or replace as follows:
1. With the receiver pressure higher than the freezer pressure, manually open the valve by turning
the manual stem out until you hear gas passing through the valve.
2. Close the two hand stop valves (#90) tight on either side of solenoid valve when there is vapor
only in that part of the line.
3. Loosen the 1/4” tubing compression nut at the strainer slightly to purge that section of the thaw
gas line and continue to purge until all pressure is relieved.
4. Repair or replace the valve as needed making sure all connections are tight.
5. With the valve manually opened (stem out), open slightly only one stop valve #90 and purge air
from the line through the 1/4” tubing compression nut at the strainer. Then close that valve #90
and open the other #90 valve to purge air from that section of the line.
6. When purging is complete, tighten the compression nut, manually close the solenoid valve (stem
in until it protrudes about 1/8” out from the housing).
7. Reopen stop valves #90 and check for leaks.
8. Adjust the regulating valve to approximately 65-70 psig to the freezer pressure during harvest.
Machine Strainer Solenoid
P24A 12A4140S18P 12A4200A1404P
P34A 12A4140S18P 12A4200A1403P
Note: “P” Indicates plated.
FIGURE 9-7
Thaw Gas Strainer / Solenoid Valve / Stop Valve