Technical data

Installation, user and maintenance manual – GAHP-A
31
WARNING: the presence of free chlorine (CL
2
) in the water can damage steel or copper
parts of the installation. Make sure that water does not contain free chlorine; if in doubt,
it is recommended to make a specic analysis and/or add to water some specic product
(by example, Alphi-11 Protector, by Fernox, which also has inhibitory eect against pos-
sible icing). For further details, please contact directly Robur SpA (phone: [phone]).
The non-respect of the above recommendations can compromise the smooth operation
and the lifetime of the appliance, invalidating warranty.
Table 4.1 – Chemical and physical parameters of water
CHEMICAL AND PHYSICAL PARAMETERS OF WATER IN HEATING/COOLING SYSTEMS
PARAMETER UNIT OF MEASUREMENT OPTIMAL VALUE
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
SUBSTANCES HAZARDOUS EVEN AT VERY LOW CONCENTRATION
Free chlorine ABSENT
Fluorides ABSENT
Sulphides ABSENT
Physical and chemical properties of the system water.
The components described below, are those to be always tted in proximity to the
appliance:
ANTIVIBRATION JOINTS in line with the water and gas connections of the •
appliance.
MANOMETERS installed in the inlet and outlet water pipes.•
INLET FLOW CALIBRATION VALVE, either of the gate valve or the overcentre valve •
type, installed in the water inlet pipe of the appliance (only if the appliance is con-
troller by a DDC).
WATER FILTER installed in the appliance water inlet pipe.•
ISOLATION BALL VALVE in the water and gas pipes of the plant.•
3 BAR SAFETY VALVE installed in the appliance outlet water pipe.•
PLANT EXPANSION TANK installed in the appliance outlet water pipe.•
EXPANSION TANK for individual appliance installed in the appliance water outlet •
pipe (primary side). Provide a plant expansion tank in any case (secondary side),
installed in the appliance water outlet pipe.
The appliance is not equipped with an expansion tank: therefore it is necessary to install a
suitable expansion tank, sized in relation to the maximum heat excursion and maximum
operating pressure of the water of the plant.
variable rate WATER CIRCULATION PUMP, FOR PLANT WITH A SINGLE APPLIANCE, •
located on the water inlet pipe of the appliance, owing towards the appliance.
variable rate WATER CIRCULATION PUMP, FOR PLANT WITH A SEVERAL APPLIANCES •
(each appliance have is pump), owing towards the appliance.
PLANT FILLING SYSTEM: if automatic lling systems are used, a seasonal check of •
the percentage of monoethylene glycol in the plant is recommended.