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

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P24A & P34A Service Manual
SERVICING OPERATIONS
12/18/12
9-22
The Liquid Feed Solenoid Valve
(20), Figure 9-8, is opened and closed during the freezer cycle by
the float switch #10, in order to maintain the proper freezer refrigerant level. It is closed when the
machine is off to prevent liquid flow from the receiver to the freezer.
Repair or replace as follows:
1. With the receiver pressure higher than the freezer pressure close the hand stop valve #58 and #29
(upstream and downstream) in the liquid line between the receiver and liquid feed solenoid
valve.
2. Manually open (screw stem in until only 1/8” protrudes) and allow the liquid to flow to the
freezer and clear this part of the line of liquid, leaving only vapor.
3. Close the other hand stop valve #29 (downstream). This will isolate the solenoid valve.
4. Purge the remaining ammonia from this line through the strainer purge valve #75.
5. Repair or replace the valve as needed, making sure all connections are tight.
6. Evacuate or purge air from this isolated part of the liquid line through the strainer purge valve.
7. After purging, manually close (screw stem out) the solenoid valve and open stop valves #29 and
#58,check for leaks.
Machine Strainer Solenoid Check Valve
P24A 12A4140S05P 12A4200A06P
P34A 12A4140S07P 12A4200A0801P
12A4200B0602
Note: “P” Indicates plated.
FIGURE 9-8
Liquid Line Strainer / Solenoid Valve / Check Valve
Water Flush Solenoid Valve
(63) is opened during the thaw (harvest) cycle, to flush out some of
the impurities form the water in the tank, thereby improving the ice quality. Repair or replace as
follows:
1. Turn off the water supply to this valve.
2. Dismantle the valve and inspect for dirt, etc., and wear. Reverse osmosis water can cause
premature wear and erosion of the brass parts of this valve, you may want to consider replacing
the valve with a stainless steel valve.
3. Repair or replace the valve as needed.
4. Turn on the water supply and check for leaks.