Water Piping Connections; Water And Refrigerant Circuit - Scotsman MAR 78 Service Manual

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For pressurizing, evacuating and charging the
system, two service valves are necessary; one
should be in the Suction Line at the inlet side of
suction filter and one should be in the Liquid Line
at the outlet side of filter dryer.
The two Service Valves, if properly capped can
be left permanently in the system. Connection
should be 3/8" or 1/2" size.
MAR SPLIT UNIT - WATER PIPING
CONNECTIONS (PLUMBINGS)
MAR SPLIT UNIT is supplied with float valve in
position to maintain the water level in drum
reservoir at the height required for fresh water
operation or if required, for sea water operation.
WATER AND REFRIGERANT CIRCUIT - SPLIT UNITS
1. Liquid line
2. Heat exchanger
3. Automatic expansion valve
4. Suction line
5. Water inlet
6. Float valve
7. Water basin
Water inlet line must go directly to float valve line
fitting of 3/4" gas, (copper tube is not
recommended for sea water supply) also make
sure to fit on this same a hand shut-off valve
close enough to MAR unit and a proper kind and
size of filter strainer.
Incoming water geoes through the float reservoir
first and then to drum basin.
Outlet water line should be shaped adequately to
drain by gravity any water passing through it.
Water outlet fitting from float reservoir requires a
20 m/m I.D. water hose.
All plumbing connections should be made in
accordance with local plumbing codes.
8. Evaporation drum
9. Scraping blade
10. Water pump
11. Spray bar
12. Water tube - Pump / spray bar
13. Liquid line valve
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