Viessmann M22, Operating And Service Instructions

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5. Close the boiler doors and inspection port at the
back of the boiler.
Checking the water chamber for deposits (M62, M82)
1. Fully drain the boiler.
2. Depending on the boiler version, clean the water
chamber with hosed water. Remove deposits via
the drain outlet.
If access to the water chamber is not possible,
remove stubborn deposits with approved chemical
solvents.
3. Clean the sealing faces and thread of the inspec-
tion port. Replace the gaskets. Lubricate the
thread. Tighten the new gaskets after commission-
ing (see table on page 21). Check again after 24
hours run.
Checking the connections and inspection ports on the water side for leaks
Danger
The surfaces of steam boilers and hot water
boilers and other areas of the system are poten-
tially hot.
Risk of injury!
Always wear protective clothing when touching
the relevant areas during operation.
1. To check for leaks, fill the boiler system with water.
2. Check connections and ports for leaks.
3. If necessary, tighten the closures (see table on
page 21).
Installation instructions for gaskets
Fig. 17 Condensing ECO
Note
If the optional thermal insulation is fitted, this must first be removed.
?
Fig. 18 Non-condensing ECO
Commissioning, inspection, maintenance
Mounting the burner (if required)
(cont.)
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