Regal 53 SC Owner's Manual page 126

Overview
The air conditioning evaporator/condenser units require
a constant supply of seawater to function correctly. The
seawater uses a seacock/stainer to send seawater to the
230 volt A/C pump. (Note that a Sea Chest pump option
may be installed between the seacock and the A/C pump.
The Sea Chest pump (macerator) fi lters the seawater thus
eliminating the need for a strainer in the system).
At this point the water travels to a manifold where it is
distributed to the evaporator/condenser units.
AIR CONDITIONING HOSE IDENTIFICATION
TO A/C SEAWATER
EVAP./COND. INLETS
The A/C manifold is located at the starboard aft engine
room. Periodically inspect all fi ttings and connection points
for leaks. Also, tighten hose clamps as required.
74
Chapter 4
FROM A/C 230 VOLT
PUMP