UNITHERM
GOVERNOR
UG SPRING
UG PLUG
GASKET
(BEHIND UG)
To test the operation of the Unitherm Governor, place
in hot water (over 110°F) and watch for movement
against spring. If there is no movement, replace unit.
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 next to the outlet
p
ipe connection.
4. Unsnap old U.G. to remove from retainer plug.
Snap in new U.G.
5. Reinstall retainer plug, taking care to lubricate
gasket with a non-petroleum based grease such
as AquaLube.
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