Chapter 3
W35F, W50F - Water cooled with pump
NOTE: The W35F and W50F compressors are designed to work with sea water only. They are not
designed to use water from other sources, i.e. water tanks, skin tanks, or coolant pumped through
secondary heat exchangers. Serious health risks and/or performance issues can occur if any form of
liquid coolant delivery is used other than sea water being pumped directly into the system and then
expelled back overboard.
This unit must be mounted with compressor right way up on a horizontal surface in an area where it
will not be susceptible to physical or water damage, but accessible for service. Consideration should be
given for access to the water and refrigerant line connections. A mounting kit is supplied with the
compressor that includes rubber mounts and steel inserts. The unit may be screwed or bolted down
using the supplied white, plastic washers, if desired. If a Bulkhead Bracket (PN E52135) is used,
remove the stainless steel mounts from the compressor and use the plastic mounts provided with the
Bulkhead Bracket.
3:1
Raw water pump
The pump supplied by Frigoboat is self-priming and requires a good intake strainer of 120 mesh. Other
pumps of similar performance may be used. After installation, check for leaks and a water flow of at
least 1 gal/min. The pump power must be supplied through a 12v relay whose coil is connected to the
fan terminals. The fan terminals on the module are limited to a current draw of 0.7 amps and will
deliver 12v even if the system is connected to a 24v supply. Full wiring instructions are included with
the compressor.
If more than one W35 or W50 is sharing a single water pump, they must be plumbed in a parallel
configuration so that the pump output is split equally to each unit, and each unit receives water direct
from the pump. The water discharges from each unit can then be combined into one single overboard
discharge. Multiple W35 or W50 units must
not
be plumbed in a series string; i.e. pump output into
unit 1; output from unit 1 to inlet of unit 2, etc., etc.
The positive (+) lead to the pump can be wired in parallel to the individual 12v relays so that any unit
can operate the water pump independent of the other(s).
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Chapter 4
K35F, K50F - Water cooled with Keel Cooler
The compressor unit must be mounted with compressor right way up on a horizontal surface in an area
where it will not be susceptible to physical or water damage, but accessible for service.
Consideration
must be given to the fact that the compressor must be mounted within 5' of the Keel Cooler.
This
dimension cannot and must not be extended.
A mounting kit is supplied with the compressor that includes rubber mounts and steel inserts. The unit
may be either screwed or bolted down using the supplied white, plastic washers, if desired. If a
Bulkhead Bracket (PN E52135) is used, remove the stainless steel mounts from the compressor and
use the plastic mounts supplied with the Bulkhead Bracket.
4:1
Keel Cooler
This must be mounted through the hull by drilling a 1 9/16" (40mm) hole (a 1.5" hole may be used,
carefully enlarging it, if necessary). Make a dry run(s) without the rubber O-ring and sealant installed,
