7
A
B
Heat meter installation
The HIU is fitted to house a compact heat meter
(with incorporated
return probe)
with 1” threaded connections and length of 130 mm.
Before carrying out any maintenance, repair or part replacement work,
proceed as follows:
- cut off the electric supply
- remove the cover
- close the shut-off valves on the primary flow and return
- empty the HIU using the drain cocks provided
- remove the template (A)
- remove the cap (B)
- install the flow meter on the return pipe. To tighten the nuts apply
maximum tightening torque of 25 Nm, taking account of the
indications of the heat meter manufacturer.
- install the flow probe in the M10 pocket (B).
Please refer to the heat meter technical data sheets for further
information.
Conveyance of the safety relief valve
The safety relief valve is equipped with a compression fitting suitable for 15 mm copper pipe and can be rotated in accordance with the HIU installation
position. If SATK32 is installed with upward facing connections, use discharge pipe code 789832, specifically designed to route the valve drain line
through the insulation shell, without damaging the internal electronic components.