Robur GAHP Line AR Series, Инструкция по установке, эксплуатации и обслуживанию

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Plumbing installer section
Ed. 2014-08
41
The way the installation is operated can be the cause of possible degradation of water
quality.
Moreover, abnormally massive water top-up or reintegration can cause a drift of chemical
or physical above-mentioned parameters. Reintegration should not exceed 5% per year of
the total amount of water. 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 Robur appliances.
Several products for water treatment are available on the market.
In case washing of the pipes 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 washing, avoiding the use of substances
aggressive for stainless steel or containing/releasing active chlorine.
Please make sure the pipes are properly rinsed in order to remove any residue of
chemical substances from the pipes.
Robur is not liable for ensuring that water quality is always compliant with what reported in
Table 14 is not’s. Non-compliance with indications above may jeopardize the proper
operation, integrity and reliability of Robur appliances, invalidating the warranty.
For any further detail, please contact directly Robur Corporation Evansville, IN
Phone (812) 424-1800; Fax (812) 422-5117.
3.6 GAS PRESSURE ADJUSTEMENT
The manufacturer supplies the units already adjusted for a particular type of gas. The type
of gas can be checked and easily identified by looking at the marking label inside the unit.
Nevertheless, before starting the unit check and if necessary adjust the Gas Input (HHV)
to the burner. Using the table below (natural gas; for Propane gas models see further),
arrange the proper manifold pressure according to the local gas heating value (BTU
content per cubic foot) and specific gravity. This table is based on the correct natural Gas
Input (HHV) for the model by manifold pressure in inches of water column (in WC).
SPECIFIC GRAVITY OF NATURAL GAS
BTU CONTENT PER CU.FT.
0,55 0,6 0,65 0,7
950 3,15 3,43 3,72 4,01
975 2,99 3,26 3,53 3,80
1000 2,84 3,10 3,36 3,61
1025 2,70 2,95 3,20 3,44
1050 2,58 2,81 3,04 3,28
1075 2,46 2,68 2,90 3,13
1100 2,35 2,56 2,77 2,99
1125 2,24 2,45 2,65 2,86
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