32
PRIMARY RETURN 3-PORT PROPORTIONAL MIxING VALVE (ONLY WITH DHW PRODUCTION KIT)
Function: the mixing valve is thermostatically controlled through a bulb connected on the DHW
outlet pipe. In function of the demand of DHW, the valve will increase/decrease the opening.
The temperature is adjustable from 40 to 70°C. The expansion of the liquid inside the bulb deter
-
mine the functioning of the valve. Connection M30x1,5
3-port valve with body in brass – No. 3 threaded male connections G1” with flat seat. Stroke of
the shutter 3,7 mm.
With the valve’s stem in lower position the port A is closed, with the valve’s stem in high position
the port B is closed.
Kvs: 5,0
Max working temperature: 120 °C
Max operating pressure: 16 bar
ExAMPLE OF APPLICATION
T-FIRE MODUL
DCW inlet
Boiler - Fireplace stove
Controller
Caldaia a gas
User (heating circuit)
DHW outlet
A
AB
B
IMPORTANT
!
Components description
Assembling instrunctions and maintenance
In presence of water with hardness above 25 ÷ 30 ° Fr, is prescribed an
appropriate treatment of the heating water, in order to avoid limescale
problems. It should
be noted that even a small quantity of limescale, could reduce the per
-
formances of the domestic side.
The materials of construction are in compliance with the Directive 98/83
EC.
Despite the fittings are mounted at the factory, it is advisable to monitor
all screw connections. Equally important is to do a pressure test during
the operation.
Exceeding above listed limits may cause damages to module and impair
warranty terms consequently
DESCRIPTION
UNIT
LIMIT VALUES FOR COPPER SOL-
DERED HEAT EXCHANGER
PH
pH
7-9 (including saturation factor)
Saturation factor(delta PH))
pH
-0.2<0<+0.2
Total hardness
°Fr
15-30
Conductivity
µS/cm
10...500
Sediments
mg/l
<30
Clorine
mg/l
<0.5
Hydrogen sulphide
mg/l
<0.05
Ammonia
mg/l
<2
Hydrogen carbonate
mg/l
<300
Hydrogen carbonate / sulphide
mg/l
>1.0
Sulphide
mg/l
<1
Nitrate
mg/l
<100
Nitrite
mg/l
<0.1
Sulphate
mg/l
<100
Manganese
mg/l
<0.1
Free iron
mg/l
<0.2
Free carbon dioxide
mg/l
<20
