24
EN
Maintenance
8 .5 Cleaning the Condenser Coil
(DX Systems Only)
To avoid a marine-growth-fouled coil:
1. Turn off the circuit breaker on the ship’s panel.
2. Disconnect the inlet and outlet connections of the
condenser coil.
3. Use chemical-resistant hoses [white PVC 5/8 in.
(16 mm) I.D., etc.] to connect the inlet of the
condenser coil to the outlet of a chemical resistant,
submersible pump (P-500 pump, etc.).
4. Place a strainer or piece of screen over the inlet of
the pump and submerse the pump into a container
filled with fresh water or with a premixed over-the-
counter solution. Use as large a container as possible
to hold 5–25 gal (19–95 L) of solution. Let the hose
connected to the coil outlet flow freely into the
container.
5. Power the pump and circulate the solution through
the condenser coil for 15–45 minutes depending
on the size of the coils and the extent of the
contamination.
6. Visually inspect the solution in the container to
determine when the level of the contamination
removal.
7. Circulate fresh water through the coil to flush any
residual cleaner from the system.
8. Restart the system. Check the operational parameters
to verify a thorough cleaning of the system.
9. Provide additional cleaning as necessary for extreme
contaminations.
8 .6 Winterizing the System (DX
Systems Only)
Any winterization method that causes the antifreeze
solution to flow downward is the method of choice. By
this means, the antifreeze solution displaces any trapped
water and eliminates the possibility of it freezing in
hidden areas.
Choose one of the methods below. The first two
methods use a 50/50 nonpolluting, biodegradable
antifreeze/water solution:
1. Pump the antifreeze solution into the overboard
thru-hull fitting, and discharge the antifreeze solution
through the intake thru-hull fitting.
2. Use the seawater pump to pump the antifreeze
solution through the system and discharge through
the overboard thru-hull fitting:
a. Close the seacock.
b. Remove the hose from the strainer discharge.
c. Raise the hose above the pump (so the pump
does not lose its prime) and pour in the antifreeze
solution.
d. Pump the solution through the system.
e. Drain the water from the strainer and the hose to
the seacock.
3. Inject pressurized air at the overboard discharge
fitting to force any system water through the seawater
intake fitting, and expel any trapped water from the
system.
For all three methods, remove the impeller from the
wet-end assembly of the seawater pump and wipe it
with an alcohol solution. Store the impeller in a warm,
dry area until needed.
