Installation, user and maintenance manual
– GAHP-A
29
As with other heating appliances, Potterton heating and cooling systems operate with
water of good quality. In order to prevent any possible problem of operation or reliability
caused by fi lling or top-up water, please refer to codes and standards regarding water
treatment for heating systems in commercial applications. Parameters indicated in Table
4.1 Chemical and physical parameters of water on page 29 must be complied with.
Table 4.1
– Chemical and physical parameters of water
CHEMICAL AND PHYSICAL PARAMETERS OF WATER IN HEATING/COOLING SYSTEMS
PARAMETER
UNIT OF MEASUREMENT
ALLOWABLE RANGE
pH
\
6,5 - 8,0
Chlorides
mg/L
< 125
Total chlorine
mg/L
< 5
Total hardness (CaCO
3
)
°f
10 - 15
Iron
mg/L
< 50
Copper
mg/L
< 3
Aluminium
mg/L
< 3
Langelier’s index
\
0
HARMFUL SUBSTANCES
Active Chlorine
mg/L
< 0,2 (*)
Fluorides
ABSENT
Sulphides
ABSENT
* In accordance and respecting current legislation.
Water quality can be measured through parameters like acidity, hardness, conductivity,
chlorides content, chlorine content, iron content and the like.
The presence of active chlorine in the water, in particular, can jeopardize parts of the
installation and Potterton Commercial units. Therefore, please make sure that active
chlorine content and total hardness are compliant with the allowable ranges reported in
Table 4.1 Chemical and physical parameters of water on page 29.
The way the installation is operated can be the cause of possible degradation of water
quality.
It is advised to check regularly the water quality, especially in case of automatic or periodic
top-up.
In case water treatment is needed, this operation should be carried out by a professional
or competent person, following strictly the instructions by the manufacturer or supplier
of the chemical substances for the treatment, since dangers could arise for health, for the
environment and for Potterton Commercial appliances.
Several products for water treatment are available on the market.
Without being exhaustive, Potterton Commercial can indicate the following ones:
• FERNOX – Alphi 11 Protector (Anti Protective action).
• FERNOX – F1 Protector (Protective action).
• FERNOX – AF 10 Biocide (Biocide for underfl oor heating systems).
If the system is to be chemically fl ushed, this operation should be carried out by a
professional or competent person, following strictly the instructions by the manufacturer
or supplier of the chemical substances for the fl ushing, avoiding the use of substances
aggressive for stainless steel or containing/releasing active chlorine.
Please make sure the pipes are properly fl ushed in order to remove any residue of chemical
substances from the pipes.
Potterton Commercial is not liable for ensuring that water quality is always compliant
with what reported in Table 4.1 Chemical and physical parameters of water on page 29.
Non-compliance with indications above may jeopardize the proper operation, integrity
and reliability of Potterton Commercial appliances, invalidating the warranty.
