All ducting should be installed to be
as smooth, straight and taut as possible, avoiding any unnecessary
bends of loops. Once ducting runs are positioned properly they
should be securely fastened to avoid shifting due to motion of the
vessel. Trim excess ducting.
Plastic vacuum-formed and insulated
aluminum transitions are available for proper air flow direction
into any cabin or area. Ducting should be properly secured to these
transitions to prevent air flow leakage. Built-in plenums or chases
must be sized properly, completely sealed and insulated.
Reinforced marine grade hose should be
used for the sea water circuit. All fittings must be double/reversed
hose clamped. The hose should be routed upward from the thru-hull
intake to the condensing unit to prevent air locks in the
centrifugal sea water pump. Condensate drains must be routed
downward, without any kinks or restrictions, to a sump or overboard
discharge and must be securely fastened.
Circuit breakers and wire gauge must
be sized according to marine design standards. Only stranded tinned
copper wire should be used. All equipment should be properly
In keeping with regulations set forth
by the EPA, only certified technicians should perform service on, or
make adjustments to, the refrigerant circuit.