Commissioning; Flushing The Reheating Circuit; Water Treatment - Vaillant uniSTOR Operating Instructions Manual

5 Commissioning

6 Commissioning
6.1

Flushing the reheating circuit

Detailed recommendations for the water circuit can be
found in BS 6798 and BS 5449: Part 1 (for central heat-
ing systems with both small and the smallest pipe
width).
Pipes which do not form part of the usable heating sur-
face must be insulated in order to prevent heat losses
and possible freezing. Pipe insulation is particularly
important if you are installing pipes under the roof or
in open areas under the floor.
Discharge valves must be mounted in easily accessible
locations, so that the entire system, including the boiler
and hot water system, can be discharged. Discharge
valves must have a nominal size of 1/2 inch BSP and
comply with BS 2879.
Copper pipes which comply with BS 2871: Part 1 for
water-carrying pipes must be used. All soldered connec-
tions in the private hot water pipe system must be made
with lead-free soldering material.
Caution!
b
Risk of material damage as a result
of deposits in the unit or system!
Cleaning agents can result in deposits and
follow-on damages.
> Use a suitable cleaning agent in
accordance with this instruction manual.
> Never leave cleaning agents in the sys-
tem for longer than 24 hours.
> Completely remove the cleaning agents
from the system by flushing it tho-
roughly.
All cleaning must be performed before installing the new
boiler and must comply with BS 7593. Information on
the use of cleaning agents for the system can be
obtained from Sentinel, Betz Dearborn Ltd. Widnes,
Cheshire, WA8 8UD. Tel: 0151 420 9595, or Fernox, Alpha
Fry Technologies, Tandem House, Marlow Way, Croydon,
CR0 4XS. Tel: 0870 8700362.
28
6.2

Water treatment

Caution!
b
Risk of material damage due to unsuita-
ble water!
Unsuitable water can lead to deposits and
corrosion damage in the cylinder and in the
hot water circuit.
> Use only potable water with a chloride
content of below 250 mg/l in the hot
water circuit.
Caution!
b
Risk of material damage as a result of
enriching the heating water with unsuita-
ble frost or corrosion protection agents!
Frost and corrosion protection agents can
cause changes to the seals, noises during
heating mode and possibly subsequent
damage.
> Do not use any unsuitable frost and cor-
rosion protection agents.
Mixing additives with the heating water can result in
material damage. However no incompatibility with Vail-
lant units has been detected with proper use of the fol-
lowing products over a long period.
> When using additives, follow the manufacturer's instruc-
tions without exception.
Vaillant does not accept any liability relating to the com-
patibility or efficiency of any additives throughout the
heating system
Additives for cleaning measures
(subsequent flushing required)
– Fernox F3
– Jenaqua 200
– Jenaqua 300
– Jenaqua 400
– Sentinel X 300
– Sentinel X 400
Additives intended to remain permanently
in the system
– Fernox F1
– Fernox F2
– Jenaqua 100
– Jenaqua 110
– Sentinel X 100
– Sentinel X 200
Additives for frost protection intended
to remain permanently in the system
– Fernox Antifreeze Alphi 11
– Sentinel X 500
Installation and maintenance instructions for uniSTOR 0020111105_00