Checking The Thermal Insulation For Firm Seating; Checking The Mixer For Ease Of Operation And Leaks; Checking The Ventilation Air Connection To The Burner (If Installed); Adjusting The Burner - Viessmann Vitorondens 200-T Service Instructions Manual

Checking the expansion vessel and system...
2. If the pre-charge pressure of the expansion vessel
is lower than the static system pressure, top up with
nitrogen until the pre-charge pressure is 0.1 to
0.2 bar (10 to 20 kPa) higher.

Checking the thermal insulation for firm seating

Checking the mixer for ease of operation and leaks

1. Remove the motorised lever from the mixer handle
and check the mixer for ease of operation.
2. Check the mixer for leaks. Replace the O-ring gas-
kets if the mixer is leaking.

Checking the ventilation air connection to the burner (if installed)

In balanced flue operation: Check the ventilation air
connection for damage.

Adjusting the burner

Burner service instructions

Instructing the system user

The system installer should hand the operating instruc-
tions to the system user and instruct the user in oper-
ating the system.

Operating and service documents

1. Complete and detach the customer registration
card:
■ Hand system users their section for safekeeping.
■ Retain the heating contractor's section.
2. File all parts lists, operating and service instructions
in the folder and hand this over to the system user.
Commissioning, inspection, maintenance
(cont.)
3. Top up with water until the charge pressure of the
cooled system is 0.1 to 0.2 bar (10 to 20 kPa)
higher than the pre-charge pressure of the expan-
sion vessel.
Permiss. operating pressure: 3 bar (0.3 MPa)
3. Snap the motorised lever into place.
This includes all components installed as accessories,
e.g. remote control units. In addition, the system instal-
ler must make the user aware of the required mainte-
nance work.
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