Information On Maintenance - Viessmann Vitomax HW Series Operating And Service Instructions

Operating information
Shutdown and preservation
3. Check the concentration of the oxygen binder reg-
ularly and at least every month; if necessary, add
more oxygen binder.
Preserving single boilers in a multi boiler system
The relevant boilers are kept at temperatures such that
water from the rest of the boiler system flows through
them.
Corrosion protection of a full boiler shell
A fully filled boiler shell is maintained at a pressure of
0.1 to 0.2 bar using nitrogen, specifically nitrogen 5.0.
!
Please note
Frost may cause damage to the boiler.
Do not use wet preservation if there is a risk of
frost!
!
Please note
Do not use layer-forming monoamines.
The use of film-forming polyamines must be
agreed with and approved by the boiler manu-
facturer.
Treating the flue gas side
1. Clean the heating surfaces on the flue gas side.
Maintain the alkaline balance of the water used for
cleaning at pH 8 to 9, or, in the case of ammonia,
pH 10.
2. Dry the heating surfaces on the flue gas side (allow
normal air flow).
3. Accelerate the ventilation process by means of a
fan heater. If necessary, open the flue gas shut-off
dampers, then close them again.
4. Spray preserving oil, e.g. graphite or varnish, onto
the flame tube walls and hot gas flues, or apply it
with a brush.
5. Keep the boiler door(s) open. Keep the boiler sur-
faces dry during idle periods.

Information on maintenance

Correct maintenance ensures trouble-free, efficient
and environmentally responsible system operation:
Observe the specified maintenance intervals
■
Only use authorised companies:
■
Viessmann Industrial Service (for contact details
–
see page 28)
– Other authorised contractors
10
(cont.)
Recommendation
Agree the steps for the preservation of the water side
with the manufacturer of the preserving agent.
Applicable regulations
Draining preserving solutions
Conditions for draining waste water into sewer sys-
■
tems or the main discharge system
Use of preserving agents
■ Working instructions and safety datasheets supplied
by the product manufacturer
6. Apply a desiccant (silica gel).
7. Use a dryer with a fan.
Recommendation for areas with high relative
humidity
Do not use dry preservation in areas with high relative
humidity (in the tropics, near the sea) due to the spe-
cial installation conditions that prevail in these areas.
Detailed information
■ Operating instructions for preservation on the
water and hot gas side
■ Datasheets of the VdTÜV, no. MB TECH
1466, dated 2014-01, and the VGB, no.
R116H, dated 2009