Technical data

Appendix
27
Initial Start-up
Collector
Pressure relief valve
Solar-Divicon
Diaphragm expansion vessel
High-limit safety cut-out
DHW tank
Air vent c/w shut-off
Overflow container
T
Temperature sensors
The collector circuit must be protected
in such a way that at the highest
possible collector temperature
(shutdown temperature) no heat
transfer fluid can es cape from the
safety valve, or the air vent.
This is achieved by t he appropriate
sizing of the expansion tank and
matching of the sys tem pressure.
Under cold fill conditions, a minimum
static pressure must be maintained. It
can be calculated by the following:
22 psig +0.45 psig x_____h(ft.)
or
1.5 bar + 0.1 x_____h(m)
Commissioning and Adjustment
For commissioning of the solar heating system, refer to the Vitosol Service and Operating Instructions.
5285 710 v2.0
IMPORTANT
The pressure relief valve must be piped
to the overflow container or drain at all
times, since excessively hot fluid can
discharge from the system.
CAUTION
After de-aeration, the air vent c/w
shut-off at top of system must be
closed. To protect the solar s ystem
from overheating in the summ er, e.g.
during the holidays, do not shut down.
CAUTION