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25. PUMP CAPACITY/ HEAD
This is a high static head pump fit for installation on any type of single or double-pipe heating system. The air vent valve
incorporated in the pump allows quick venting of the heating system.
mod. 140 - 240
mod. 280-320
FLOW l/h
WATER FLOW RATE (l/h)
N.B.:
An oversize pump with the same characteristics as the pump mounted on the 280-320 models is available for the
140-240 models.
26. DRAINING THE STORAGE BOILER
Drain the water in the storage boiler as follows:
• close the water inlet tap;
• open a user tap;
• unscrew the ring nut from the relative drain tap (fig. 14);
• loosen the nut on the DHW outlet pipe on the storage boiler.
27. CONNECTING THE EXTERNAL PROBE
The boiler is prearranged for connection of an external probe (supplied as accessory).
For the connection, refer to the figure below (terminals 3-4) and the instructions supplied with the probe.
TERMINAL BLOCK M2
CN5
Figure 16
When the external probe is connected it is possible to adjust the heating delivery temperature in two different ways.
If the climate controller is installed in the boiler (section 18.1), the adjustment of the heating delivery temperature depends
on the K REG curve (graph 3), manually set using the buttons +/-
.
If the climate controller is installed on the wall (section 18.2), the adjustment of the heating delivery temperature is auto-
matic. The electronic management automatically sets the correct climate curve, depending on the external temperature
and on the ambient temperature found (see also section 20.1).
IMPORTANT:
the value of the delivery temperature TM depends on the F16 parameter setting (section 21). The ma-
ximum settable temperature may 85° or 45 °C.
7864176 - en
INSTRUCTIONS FOR FITTERS
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