COMMISSIONING
6 720 643 603 (2011/11)
14
6 COMMISSIONING
6.1 USE OF HEAT TRANSFER FLUID
The heat transfer fluid is pre-mixed and ready to use.
It guarantees safe operation within the specified
temperature range, protects the system from frost
damage and minimises risk of vaporisation.
The fluid is biodegradable. A safety data sheet with
further information regarding the heat transfer fluid can
be requested from the manufacturer.
The collectors must only be operated with the following
heat transfer fluids:
6.2 PURGING AND FILLING WITH A HAND
PUMP (AIR VENT ON ROOF)
6.2.1 PURGING THE PIPES
B Use a hose (1) to connect the fill and drain valve on
the safety assembly to the mains water supply.
B To drain the water away, connect a hose (2) to the fill
& drain valve on the flow limiter.
Fig. 13 Solar heating station with ball valves and gravity
brakes in the thermometers
1 Hose for water supply
2 Hose for water drainage
B Open all shut-off fittings.
B Close the right-hand ball valve (2) on the solar heating
station and the ball valve on the air vent (Æ Fig. 15,
(3)).
B Purge the pipework, making sure that the maximum
operating pressure is not exceeded.
B Shut off the water supply.
At the time of commissioning, complete all
relevant sections of the Benchmark Checklist
located on the inside back pages of this
document.
After servicing, complete the relevant Service
Interval Record section of the Benchmark
Checklist located on the inside back pages of
this document.
CAUTION: System damage from frozen water
or vaporisation in the solar heating circuit
B Purge and fill the solar heating system only
when the sun is not shining on the
collectors and (if purging with water) no
frost is expected.
When filling with heat transfer fluid, take the
additional volume of the pre-cooling vessel
into account (if installed).
The pre-cooling vessel and the expansion
vessel must be adequately drained.
CAUTION: Risk of injury through contact
with heat transfer fluid
B When handling heat transfer fluid, always
wear protective gloves and goggles.
B If heat transfer fluid comes into contact
with skin: wash off the heat transfer fluid
with water and soap.
B If heat transfer fluid comes into contact
with eyes: holding eyelids wide open,
thoroughly wash eyes with running water.
Heat transfer fluid Temperature range
Flat plate
collectors
Tyfocor L 45/55 – 29 ... +170 °C
Evacuated tube
collectors
Tyfocor LS – 28 ... +170 °C
Tab. 6 Tyfocor type in relation to collector type
If a pre-cooling vessel is installed:
B Disconnect the pre-cooling vessel from
the solar heating circuit while purging so
that the water remaining in the pre-
cooling vessel does not get mixed with
the heat transfer fluid.
7747006489-21.1SD
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