Raypak Versa 105B - Manual (Page 25)

25
CONTROL IMMERSION WELL REPLACEMENT
1. Shut water off to heater and drain heat exchanger.
2. Remove jacket top panel.
3. Remove old control well with bushing and sleeve,
with 7/8" wrench or socket.
4. Slip "o" ring gasket over control well and install in
header.
"O" Ring Gasket
Well Assembly
Fig. #8101.0
UNITHERM GOVERNOR (U.G.) REPLACEMENT
1. Shut water, gas and electricity off, close valves and
relieve pressure.
2. Drain heat exchanger.
3. Remove retainer plug located under outlet pipe
connection.
4. Remove spring and replace old U.G. with a new
U.G.
5. Reverse above procedure to re-install.
Gasket
U.G.
Retainer Plug
Spring
Fig. #8071.0
To test the operation of the Unitherm Governor, place
in hot water (over 100°F) and watch for movement against
spring. If there is no movement, replace unit.