Before Installation; Installation Regulations; Installation Requirements; Water Treatment - Baxi POWER HT+ Series Installation, User And Service Manual

5 Before installation

5 Before installation
5.1

Installation regulations

5.2

Installation requirements

Tab.12 Heating water specifications
Specification Unit
Degree of acidity
pH
(untreated water)
Degree of acidity
pH
(treated water)
Conductivity at
μS/cm
25°C
Chlorides mg/litre
Other components mg/litre
°f
Total water hard­
°dH
ness
(1)
mmol/litre
(1) For installations with constant heating and a maximum total system output of 200 kW, the appropriate maximum total water hardness is
8.4°dH (1.5 mmol/l, 15°f). For installations of more than 200 kW, the appropriate maximum total hardness is 2.8°dH (0.5 mmol/l, 5°f).
28 POWER HT +
Warning
The boiler must be installed by a qualified installer in accordance
with local and national regulations.
5.2.1

Water treatment

In many cases, the boiler and the heating system can be filled with mains
water, without treating the water.
Caution
Do not add any chemical products to the central heating water
without first consulting a water treatment specialist. For example:
antifreeze, water softeners, products to increase or reduce the pH
value, chemical additives and/or inhibitors. These may cause
faults in the boiler and damage the heat exchanger.
Important
Flush the installation with at least 3 times the volume of water
contained in the central heating system.
Flush the DHW circuit with at least 20 times its volume of water.
The water in the installation must comply with following characteristics:
Total output of the installation (kW)
≤ 70 70 - 200
7.5 - 9.5 7.5 - 9.5
7.5 - 9.5 7.5 - 9.5
≤ 800 ≤ 800
≤ 50 ≤ 50
< 1 < 1
1 - 35 1 - 20
0.5 - 20.0 0.5 - 11.2
0.1 - 3.5 0.1 - 2.0
Important
If water treatment is necessary, Baxi recommends the following
manufacturers:
Sotin
Fernox
Sentinel
5.2.2

Gas supply

Before mounting, check that the gas meter has sufficient capacity (in
3
m /h). To do this, you should bear in mind the consumption of all
appliances. If the capacity of the gas meter is too low, inform the gas
supply company.
200 - 550 > 550
7.5 - 9.5 7.5 - 9.5
7.5 - 9.5 7.5 - 9.5
≤ 800 ≤ 800
≤ 50 ≤ 50
< 1 < 1
1 - 15 1 - 5
0.5 - 8.4 0.5 - 2.8
0.1 - 1.5 0.1 - 0.5
7702630 - v02 - 11082018