Robur GAHP Line AR Series, Installation, Use And Maintenance Manual

Page: 38 / 100

GAHP-AR – Installation, start-up, use and maintenance manual
34
Edition: 2014-08
During the winter period, to prevent the water in the primary circuit from
freezing:
the appliance is equipped with an antifreeze control that activates the external water
circulation pump of the primary circuit and the burner of the appliance itself (when
necessary).
It is therefore necessary to ensure a continuous supply of electrical power and gas
to the appliance throughout the whole winter period.
If the continuity of supply of electrical power and gas cannot be guaranteed,
provide for the use of glycol antifreeze of the inhibited monoethylene type.
If glycol antifreeze is used, DO NOT USE galvanized piping in creating the hydraulic
circuit.
(Consult the notes regarding "Possible use of glycol antifreeze" in Paragraph 3.5 on page
39 and in any case the technical specifications of the glycol that is to be used).
The sizing of the tubes and of the pump must guarantee the nominal water flow rate
necessary for the correct operation of the appliance (for calculation of internal pressure
drops of the appliance refer to the TECHNICAL DATA paragraph, on page 9).
The operations necessary for the first activation or regulation of the appliance and
of the Direct Digital Controller must be carried out exclusively by an authorized
Robur Technical Assistance Centre (TAC).
These operations are described in the SECTION 5, on page 67.
The product's guarantee may be void if the first activation is not carried out by a
Robur TAC.
The following Figure 11 on page 35 shows a typical example of a hydraulic plant for a
single appliance.
Figure 12 on page 36 shows instead a typical example of a hydraulic plant for several
appliances.
For information or technical support in this regard, contact Robur Corporation
(phone: (812) 424.1800).