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

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P24A & P34A Service Manual
INSTALLING YOUR TUBE-ICE MACHINE
12/20/12
3-11
through the heads during shutdown. Do not connect this drain line into a common header with any
drain line from the water tank. Note: The water regulating valve contains a 1/8” orifice through inter
gate to permit some flow though the compressor if the solenoid is open.
Water Tank Drain.
This valve and connection is for the purpose of flushing and draining the water
tank of impurities, foreign material and cleaning chemicals used during servicing. It should be piped
to an open drain or sump for visible discharge. It can be tied in with the overflow line but no others.
Water Tank Overflow.
A 3” FPT connection on the side of the water tank is provided to carry
away overflow water during the thawing (harvest cycle). This water contains ice fines accumulated
during harvesting and dissolved solids accumulated during the freezing cycle.
Do not reduce the
size of this line
. Three inches is needed to provide sufficient area for ice fines to be flushed out,
especially if the incoming flushing water is 55 ° F (13 ° C) or below. This overflow line should not tie
in with any other drain line except the water tank drain.
Condenser Water In and Out.
One end of the condenser has two water connections. The lower
connection is the inlet and the upper connection is the outlet. See TABLE 3-2 for water
requirements and machine total heat rejection. The condenser water outlet must be extended to an
open drain or sump for visible discharge.
! CAUTION !
The condenser water outlet must not be connected onto a pressure tight common
header with the water tank due to the possibility that contaminated condenser
water may back up into the water tank. The condenser water
outlet must be piped separate from the drain or sump.
! CAUTION !
Cooling Tower.
When selecting a cooling tower, careful attention must be given to operating wet
bulb conditions. It is advisable to check with your local cooling tower distributor for their
recommendations based on actual operating conditions in your area. An average wet bulb of 78
° F is
typical in the U.S., but many localities have designed wet bulbs as low as 72 ° F or as high as 82 ° F.
The cooling tower water pump must be capable of delivering the required volume of water through
the condenser. Due to cooling tower location and pressure drop through water lines and regulating
valves, the water pump must be sized for each installation. Refer to TABLE 3-2 for condenser water
requirements. The water piping for the cooling tower and the installation of the pump must be in
accordance with the manufacturer’s instructions. Caution must be used to prevent the condenser
water pump from losing it’s prime during off cycles.
Proper water treatment for the prevention of mineral and foreign matter accumulation in the
condenser or cooling tower is recommended. A water analysis should be obtained to determine the
proper chemicals to use. The use of a 40 mesh strainer in the condenser water supply line is also
recommended.