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Appendix
System Installation
Please refer to the Vitosol
"System Design Guidelines"
for supplementary notes on
installation examples and
system types.
H The connecting lines must be pressure
and temperature-resistant (observe
the max. shutdown temperature of
the collector).
H To guarantee the satisfactory
operation of the solar heating system,
install the pipes so that complete air
venting is assured.
CAUTION
Use only red bronze fittings, brass
fittings and copper piping.
Do not use galvanized pipes,
galvanized fittings, graphitized
gaskets or any type of plastic pipe.
CAUTION
Do not carry out any soldering work
at or near the collector.
*1
E.g. HT/Armaflex (temperature resistant up to 175 ºC) supplied by Armstrong Insulation Products
32
H At least one fast-acting air vent with
shut-off valve must be installed at the
highest point of the system.
Install an air separator in the flow of
the solar circuit, upstream of the inlet
to the indirect coil of the domestic hot
water tank. Air separation is standard
in Solar-Divicon.
H The system must be equipped with an
expansion tank, safety valve and
circulation pump.
H The Solar-Divicon is equipped with a
safety valve designed for max. 87
psig / 6 bar.
H Use only a diaphragm expansion tank
that is suitable for the application as a
solar expansion tank.
H The expansion tank must be approved
for use in a solar heating system and
must be connected via a heat
insulating loop.
The diaphragms and seals of the
expansion tank and the safety valve
must be suitable for the heat transfer
medium.
Please refer to the "Service
Instructions" in order to
calculate the inlet pressure
of the diaphragm expansion
vessel.
H Before filling system with solar heat
transfer fluid, thoroughly flush and
clean piping system to remove all dirt,
oils, flux and solder residue.
H Fill the solar heating system with
Viessmann heat transfer medium
"Tyfocor-HTL" or suitable fluid as
described on page 7. The
"Tyfocor-HTL" is supplied as a
premixed glycol/water solution and
must not be mixed. The blow-off and
discharge pipes must be run to an
open container capable of
accommodating the total capacity of
the collectors.
CAUTION
Components used must be resistant
to the heat transfer medium.
Insulation of external piping must be
*1
resistant to temperature
radiation and to destruction by birds
(e.g. through the use of metal
sheathing).
H Prior to installing pipe insulation, run a
stranded and protected 18/2 AWG
low voltage sensor wire from the solar
controller to the collector sensor well.
Ensure all wire connections are
soldered and sealed with heat shrink
sleeve connectors (see illustration
below). Cover all wire and
connections with insulation and
jacket.
Twisted and soldered
Heat shrink sleeve
Heat lightly
Source: CANSIA
, UV
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