Vailant ecoTEC plus 937 Installation And Maintenance Instructions Manual Download

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Installation and maintenance instructions ecoTEC plus 937 0020031552_06

4.8 System

requirements

4.8.1 Water

circulation

system

Detailed recommendations concerning the water circu-
lation system can be taken from BS 6798 and BS 5449,
Part 1 (for "Small Bore” and "Micro Bore” central heat-
ing systems). Pipework which does not form part of the
usable heating surface should be insulated to prevent
heat losses and possible freezing up, especially where
the pipes run through roof spaces and ventilated under-
floor spaces. The drain connections must be located in
easily-accessible locations, so that draining the entire
system including the combi boiler and the hot water sys-
tem is possible. The drain connections should be at least
1/2 " (BSP nominal size) and must be in accordance with
BS 2879.
The combi boiler is suitable for Minibore and Microbore
Systems. Copper tubing in accordance with BS 2871
should be used for all water carrying pipework. All capil-
lary joints in all Domestic Hot Water (DHW) pipework
must be made with lead free solder. When a new boiler
is to be fitted to an existing system, it is good practise
that the system is thoroughly flushed before the boiler
if installed in the system. See BS 7593 for full details.

Caution!

Risk of equipment and system damage
caused by improper use of cleaning agents.

If you do not use cleaning agents in accord-
ance with the manufacturer's instructions or
if you leave the cleaning agents in the system
for too long, this may lead to deposits and
severe damage to your appliance and system.

Observe the instructions provided by the
manufacturer of the cleaning agent.
Leave cleaning agents in the system for no
longer than 24 hours.
Then flush the system thoroughly.

The cleaning must take place before fitting a new boiler
and in accordance with BS 7593. Recommendations for
use of system cleaning agents can be obtained from
Sentinel, Betz Dearborn Ltd. Widnes, Cheshire, WA8
8UD, Tel. 0151 420 9595, or Fernox, Alpha Fry Technolo-
gies, Tandem House, Marlow Way, Croydon, CR0 4XS,
Tel. 0870 8700362.

4.8.2 Filling and preparation of the heating system

Caution!

The use of unsuitable heating water may
cause aluminium corrosion and therefore
lead to leaks.

In contrast to steel, grey cast iron or copper,
for example, aluminium reacts with alkaline
heating water (pH value > 8.5) to produce
substantial corrosion.

When using aluminium, make sure that the
pH value of the heating water is between
6.5 and a maximum of 8.5.

Caution!

Risk of material damage if the heating
water is treated with unsuitable frost or
corrosion protection agents.

Frost and corrosion protection agents may
cause changes in the seals, noises during
heating and may lead to subsequent damage.

Do not use any unsuitable frost or corro-
sion protection agents.

The system can be filled using the incorporated filling
device. This connection must be removed again after
the filling process is complete. If the local Water Author-
ity regulations do not allow temporary connection a
sealed system filler pump with break tank must be used.
The heating system will not be filled automatically from
the domestic hot water side. (Alternative methods of
filling sealed systems are given in BS 5449)

Mixing additives with the heating water can result in
material damage. However, up to now, no incompatibil-
ity with Vaillant appliances has been detected with
proper use of the following products.

When using additives, follow the additive manufactur-
er‘s instructions without exception.

Vaillant accepts no liability for the compatibility of any
additive or its effectiveness in the entire heating sys-
tem.

Additives for cleaning purposes
(subsequent flushing required)

Fernox F3
Jenaqua 200
Jenaqua 300
Jenaqua 400
Sentinel X 300
Sentinel X 400

Additives intended to remain permanently in the sys-
tem

Fernox F1
Fernox F2
Jenaqua 100

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4 General requirements