Working Instructions
The circulation of water through the secondary circuit radiant panels is activated by the
pump featured in the GM 1192, while the thermostatic head mounted on the
adjustment valve keeps the temperature of the water to be sent to the radiant panels
constant by acting on the quantity of hot water which is integrated into the secondary
circuit.
The water returning to the primary circuit flows through the lockshield valve upon which
it is possible to act in order to balance pressure drops. It is advisable to install a
security thermostat on the pump inlet valve in order to avoid damages caused by a
sudden temperature rise. The intervention of the thermostat must block the functioning
of the pump.
How to install the fixed point thermostatic head:
The GM 1192 system is supplied with a plastic cap protecting the control stem of the
adjustment valve. Remove the protection cap.
To ease the installation, set the thermostatic head to the maximum value and screw
it onto the valve.
Set the head to the desired temperature.
Place the bulb of the head into the fastening device.
Loosen the union fittings marked with “12” in the picture to ease the installation of
the pump.
Assemble the pump taking care to place it in the correct direction, which is upwards.
After the installation, tighten back the fittings “12”
The balancing ball valve “3” is adjusted by aligning the reference mark on the control
stem with the scale by means of a 4 mm hex wrench.
The bypass valve “6” is simply adjusted by turning the knob until the desired value.
To substitute the whole tightening device of the thermostatic screw while the group
is operating, proceed as follows:
o
Remove the protection cap, manual knob, thermostatic head or thermoelectric
head;
o
Hold the screw body with a 19 mm wrench and unscrew the tightening device
by means of a 9 mm wrench;
