Technical data

4.0 System Details

4.1 Water Circulating Systems

1. The appliance is suitable for use on fully pumped

systems ONLY which may be sealed or open vented.

2. The following conditions should be observed at all

times:

• The static head must not exceed 30m of water.

• The static head must not be less than

1m of water.

• The boiler must not be used with a

direct cylinder.

• Drain cocks should be fitted to all

system low points.

• All gas and water pipes and electrical

wiring must be installed in such a way

that they do not restrict the servicing of the

boiler.

• Position isolating valves as close as

possible to the circulating pump.

• There is a drain cock supplied in the

plumbing kit.

4.2 Treatment of Water Circulating

Systems

1. All recirculatory water systems will be subject to

corrosion unless they are flushed and an appropriate

water treatment is applied. To prevent this, follow the

guidelines given in BS 7593 “Treatment of Water in

Domestic Hot Water Central Heating Systems” and the

treatment manufacturers instructions.

2. Treatment must involve the use of a proprietary

cleanser, such as Sentinel X300 or X400, or Fernox F3

and an inhibitor such as Sentinel X100 or Fernox MB-1.

3. Full instructions are supplied with the products, for

further information contact Sentinel (0800 389 4670)

or Fernox (0870 870 0362).

Failure to flush and add inhibitor to the system will

invalidate the appliance warranty.

4. It is important to check the inhibitor concentration

after installation, system modification and at every

service in accordance with the inhibitor manufacturer’s

instructions. (Test kits are available from inhibitor

stockists.)

5. For information or advice regarding any of the above

contact Technical Enquiries 0844 871 1555.