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MAINTENANCE
CLEANING THE BOILER:
Market Forge recommends that the boiler be cleaned periodically due to impurities introduced through the water
supply. All water supplies contain some mineral deposits and impurities, the degree varies with geographic loca-
tion. Market Forge is recommending a cleaning schedule that will keep your equipment in proper, safe working
order where water supplies are relatively pure. Because no water supply can be accurately compared with that of
another, this section should not be regarded as fool proof. A stepped-up, more frequent cleaning schedule may be
required when excessive impurities exist.
The Cleaning schedule should be performed two or more times per year as governed by the local water condi-
tions. Market Forge recommends the use of its “cathodic descaler” to protect the inner boiler walls and components
against rust, scale and lime deposits. The normal effectiveness of a descaler is one year.
The schedule for changing the “cathodic descaler” may be timed to the cleaning schedule or accelerated as noted
above.
Market Forge qualied service agencies are available to establish a suitable schedule for TOTAL CONCEPT clean-
ing and descaler replacement.
REPLACEMENT PARTS NEEDED TO COMPLETE THESE INSTRUCTIONS
NUMBER REQUIRED PART NO.
1 Hand-hole Cover Gasket 08-4415
1 Set of Rubber & Brass Washers 90-0039
1 Probe Plate Gasket (Gas Only) 08-4413
1 Market Forge Cathodic Descaler (all boilers) new style 08-0049
1 Dynaseal Washer 10-1135
CLEANING INSTRUCTIONS:
Move the HEAT and POWER switch to their OFF positions.On electric models also turn off the electric
power at the main switch. This will allow the boiler to empty.
Remove the hand-hole cover as follows: (Refer to Fig. 1)
Remove pressure switch box at the plumbing union and move it out of the way.
With an open end wrench back off the hex-nut, counterclockwise, so only two threads are holding it.
Then remove the pressure switch box and set aside.
With a blunt instrument, strike the hand-hole cover until its seal is broken.
Remove the hex-nut from the remaining two threads, slide off the washer and channel yoke do not allow
the hand-hole cover to drop inside.
Remove the hand-hole cover by turning it so that it will pass through the opening. Remove the bolt and
dynaseal. Discard the hand-hole gasket and dynaseal washer.
1.
2.
a)
b)
c)
d)
e)
WARNING: (ALL BOILERS ) DISCONNECT THE 115 VOLT POWER SUPPLY.
Fig. 1.