Vogt Tube-Ice HFO10, Service Manual

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4-8
Piping and Drain Connections
External shut-off valves must be installed in the water inlet lines. The minimum inlet water
pressure for satisfactory operation of the machine is 30 psig (2 bar). The maximum allowable pressure is 90 psig
(6.2 bar).
Figure 5 to Figure 7 show locations for all connections. Table 2 shows drain sizes.
Table 2: Water Supply and Drain Sizes
Makeup Water In Water Tank Drain Condenser Water In Condenser Water Out
1/2 in. (DN 15) MPT 1 in. (DN 25) FPT 2 in. (DN 50) FPT
•
2-1/2 in. (DN 65) FPT
(Non-Europe)
•
2-1/2 in (DN 65) BSPP
(Europe)
The condenser water outlet and water tank drain connections must be extended to an open drain or sump,
arranged for visible discharge. Do not allow water to be trapped in the water tank drain line, because this will
interfere with the operation of the automatic blowdown system.
Do not connect these lines into a pressure-tight common header because warm condenser water
may back up into the water tank. The condenser water outlet must be piped separately to the drain. Due to
variations in water quality by geographic location, water filtering or treatment may be required to reduce
maintenance and inhibit hardness buildup on machine components, such as freezer tubes and water valves.