General requirements
18
Instructions for installation and servicing ecoTEC 839592_13
3
3.10
Guide to system requirements
3.10.1 Water circulation system
Detailed recommendations for the water circulation
system are given in BS 6798 and BS 5449: Part 1 (for
small bore and micro bore central heating systems).
Pipework not forming part of the useful heating surface
should be insulated to help prevent heat loss and
possible freezing, particularly where pipes are run
through roof spaces and ventilated underfloor spaces.
Draining taps must be located in accessible positions
which permit the draining of the whole system including
the boiler and the hot water system. Draining taps
should be at least 1/2 in. BSP nominal size and be in
accordance with BS 2879.
The boiler is suitable for use with minibore or microbore
systems. Copper tubing to BS 2871: Part 1 should be used
for water carrying pipework. All capillary joints in all
DHW pipework must be made with lead free solder. Par-
ticularly where a new boiler is to be fitted to an existing
system, it is good practice that the system is thoroughly
cleansed.
b
Caution!
Risk of damage caused by cleanser resi-
dues!
Cleanser residues can cause formation of
deposits and can damage appliance and sys-
tem seriously.
>
Use cleansers carefully and remove them
completely by thoroughly flushing the sys-
tem.
>
Do not leave cleansers in systems for
longer than 24 hours.
This cleansing must take place prior to the fitting of the
new boiler and be in accordance with BS 7593. For
advice on the application of system cleansers contact
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.
3.10.2 Filling and preparing heating system
The system can be filled using the built in filling loop
(ecoTEC plus combination boilers only) or via a separate
filling point fitted at a convenient position on the
heating circuit. The connection must be removed when
filling is completed. Where local Water Authority
regulation does 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 incompatibility
with Vaillant appliances has been detected with proper
use of the following products.
When using additives, follow the additive manufacturer‘s
instructions without exception.
Vaillant accepts no liability for the compatibility of any
additive or its effectiveness in the entire heating system.
Additives for cleaning purposes
(subsequent flushing required)
- Fernox F3
- Jenaqua 400
- Sentinel X 300
- Sentinel X 400
Additives intended to remain permanently in the
system
- Fernox F1
- Fernox F2
- Sentinel X 100
- Sentinel X 200
Additives for frost protection intended to remain
permanently in the system
- Fernox Antifreeze Alphi 11
- Sentinel X 500
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