Installation manual

WATER HEATER CONNECTION KIT (71B & C, 82B FOUR, & 107 B & C)
The models refered to in this manual are equipped with connections for the plumbing of engine freshwater coolant
to a domestic hot water heater. One connection (to) is located on the lower side ofthe exhaust manifold. The other
connection (return) is
located on the center outer surface of the heat exchanger. Both of these connections have
square head 1/2 N.P.T. plugs
in them to plumb a domestic hot water heater into the engine's freshwater system.
Remove both of these plugs and
install the appropriate hose nipple 1/2 N.P.T. x 3/4 I.D. to route hose to and return
from the domestic water heater.
Installation: The heater should be mounted conveniently either in a high
or low position in relation to the engine,
so that the connecting hoses from the heater
to the engine can run in a reasonably direct line without any loops
which might trap air.
Air Bleed Petcock
\
\
, "Heat Exchanger
HEATER
BELOW ENGINE
Hoses should rise continuously from their low point at the heater to the engine so that trapped air will rise naturally
from the heater
to the engine. If trapped air is able rise to the heater, then an air bleed petcock must be installed
at the higher fitting on the heater for bleeding air while filling the system. Avoid loops in hose runs which will trap
air.
NOTE: If any portion of the heating circuit rises above the engine's own pressure cap,
then a pressurized
(aluminum) remote expansion tank must be installed in the circuit to
become the highest point. The remote expansion tank's part number is 24177. Tee the
remote expansion tank into the heater circuit at the heater connection, choosing the
higher of the two for the return. Tee right at the heater and plumb a
single line up to the
tank's location and the other back
to the engine's retUrn. install the remote expansion
tank
in a convenient location such as In a sail locker so the fresh water coolant level can
easily be checked. The remote expansion tank
will now serve as a check and system fill
point. The plastic coolant recovery tank is not used when the remote expansion tank kit
is installed, since this tank serves the same function.
Engines & Generators
22