I M 5. Check Thermal Pipework Insulation; Check For Proper Operation Of All Safety Equipment; Check Proper Expansion Tank And System Pressures - Viessmann Vitosol 100 Start Up & Operation Manual

Start-up, Inspection and Maintenance
Procedure
(continued)
S
Inspection and Maintenance
ervice
S
Start-up, Inspection and Maintenance
ervice
S
Start-up, Inspection and Maintenance
ervice
Delivered condition
(45 psig / 3 bar inlet
pressure)
Legend
Process medium
Nitrogen filling
Nitrogen buffer
Safety water seal,
min. 0.8 USG / 3 ltr.
Safety water seal under max.
pressure
10
5. Check the thermal pipework insulation

6. Check for proper operation of all safety equipment

7. Check diaphragm expansion tank and set system pressures
Solar heating system Under max. pressure
filled without at the highest
heat effect process medium
temperature
Check the thermal insulation of the
pipework for damage and fit. No bare
metal or fiberglass insulation should be
exposed. Adjust if necessary.
Replace all worn/faulty parts.
IMPORTANT
*1
The thermal insulation of external
pipework must be resistant to
temperature, water and UV radiation. It
must be protected against destruction
by vermin and birds (e.g. metal casing).
*1
e.g. HT/Armaflex made by Armacell
1. Drain the system until the pressure
gage indicates 0, or isolate the
expansion tank from the system and
reduce the pressure at the expansion
tank connection.
2. If the air cushion charge pressure of
the diaphragm expansion tank is
lower than the set system fluid
pressure value, top up with sufficient
nitrogen to raise the charge pressure
to match the set fluid pressure.
Set air cushion charge pressure of
the expansion tank using this
formula:
22 psig+0.45xstatic head in ft
(1.5bar+0.1xstatic head in m)
Static head (collector top edge to the
expansion tank) =
=22psig+0.45x ft=
=(1.5bar+0.1x m=
Continued on following page.
ft / m
psig
bar)