Viessmann VB2 Series Start-Up/Service Instructions

Start-up and Service
11
8. Ensure proper operation of automatic fill valv e and expansion tank; also ensure proper system water pressure
Check fill pressure when system is cold.
Ensure proper operation of automatic fill
valve and expansion tank.
If a non-diaphragm expansion tank is
used, ensure the correct water level is
present (expansion tank should be
2
/
3
full).
The usual water fill press ure is between
10 and 15 psi with the system cold.
Check pressure gage
on safety
header. All leaks must be corrected.
Refer to manufacturer’s instructions for
each of the components listed above.
9. Ensure enclosure panels are correctly fitted
1. Ensure all enclosure panels are
seated properly; adjust as necessary.
2. Ensure strain reliefs on rear panel are
tight and seated properly.
10. Ensure mixing valve(s) rotates easily and is pressure t ight (if installed)
1. Remove mixing valve lever.
2. Check if mixing valve rotates easily.
3. Ensure mixing valv e is pressure tight
(does not leak). Replace O-Ring seals
if necessary.
4. Reinstall mixing valve lever.
Service (continued)
5167 405 v2.2
IMPORTANT
This boiler is not for use in systems
where water is constantly or
frequently replenished. Minerals such
as calcium in make-up water can
deposit on heat exchanger causing
overheating, and eventually the boiler
will leak. This type of failure is not
covered by warranty. Water must not
be drained from system for use by
cleaning personnel.
CAUTION

Viessmann VB2 Series Specifications

General

Brand	Viessmann
Model	VB2 Series
Category	Boiler
Language	English