Technical data

19
924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER
This is a high static head pump t for installation on any type of single or double-pipe heating systems. The air vent valve
incorporated in the pump allows quick venting of the heating system.
25. OUTPUT / PUMP HEAD PERFORMANCES
The following parameters can be measured at the connection point on the ue gas circuit:
• temperature of the combustion products;
• oxygen (O
2
) or carbon dioxide (CO
2
) concentration;
• carbon monoxide (CO) concentration.
The combustion air temperature must be measured at the connection point on the air intake circuit, inserting the measurement
probe to a depth of about 3 cm.
For natural draught boiler models, a hole must be made in the ue gas discharge pipe at a distance from the boiler equal
to twice the inside diameter of the pipe itself.
The following parameters can be measured through this hole:
• temperature of the combustion products;
• oxygen (O
2
) or carbon dioxide (CO
2
) concentration;
• carbon monoxide (CO) concentration.
The combustion air temperature must be measured close to the point where the air enters the boiler.
The hole, which must be made by the person in charge of operating the system when it is commissioned, must be sealed
in a way which ensures that the combustion product discharge pipe is airtight during normal operation.
26. CONNECTION OF THE EXTERNAL PROBE
The boiler is prearranged for connection of an external probe (supplied as accessory).
For the connection, refer to the gure 17 and the instructions supplied with the probe.
Graph 1
OUTPUT l/h
PUMP HEAD mH
2
O
Figure 17
0711_2206 / CG_1988
Connect the cable, supplied as an accessory together with
the external probe, to the CN10 connector of the boiler
electronic board, as illustrated in gure 17.
280 Fi
240 Fi - 240 i - 1.240 Fi - 1.240 i
0603_0303
0603_0304
Graph 2
OUTPUT l/h
PUMP HEAD mH
2
O