Checking The Water Chamber For Deposits - Viessmann Vitomax HS M73 Operating And Service Instructions

Closing and securing the inspection ports
Fig. 14

Checking the water chamber for deposits

1. Fully drain the boiler.
2. Clean the water chamber by hosing it down.
Remove deposits via the drain outlet.
Remove stubborn deposits with approved chemical
solvents.
Checking the water side connections for tightness
Fill the boiler system with water.
Replace the gaskets every time the connections
are opened:
1. Clean the sealing face.
Checking the tightness of the inspection ports
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 protection when touching the rele-
vant areas during operation.
Commissioning, inspection, maintenance
Fig. 15
Fit in reverse order to the description on page 36
"Removing the inspection port closures". Tightening
torque approx. 20 Nm.
3. Clean the sealing faces and thread of the inspec-
tion port. Replace the gaskets. Lubricate the
thread. After commissioning, tighten the closures.
Check again after 24 hours run and tighten again if
necessary (see Tab. 19 on page 34).
2. Replace the gasket (see installation instructions).
3. After commissioning the system, tighten the clo-
sures (see Table 16 on page 34).
Installation instructions for the gaskets
Note
Replace the gaskets every time the closures and
inspection ports are opened. Use only gaskets
approved by the boiler manufacturer.
39