TF7039GB_A_NOT
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WARNING WHEN INTEGRATING IN THE BUILDING HEATING SYSTEM
Based on expertise, the selection and installation of components outside the unit is the responsi-
bility of the installer, who must work in accordance with good engineering practice and the regu-
lations in force in the country of destination.
The connecting pipes to the machine must be adequately dimensioned for the maximum possible
water volume flows in the unit heating circuit. If glycol mixtures are used, pressure loss values
must be subjected to the correction factors specified under 7.2.2 for the glycol content present.
Clean the connected system thoroughly before connecting the unit. This cleaning allows any pos-
sible residues, such as welding beads, secretions, rust or other impurities, to be removed from
the pipes. These substances may otherwise accumulate inside the unit and lead to the unit mal-
functioning.
When a system that has already been commissioned is at a standstill, the water contained in the
heat exchanger can freeze and cause irreparable damage to the heat exchanger on the lower
side. To avoid the danger of freezing, the following solutions are possible:
1. Fully draining the water from the unit.
2. Operating with glycolised water, with a glycol content selected according to the minimum
external temperature.
3. Using resistors. In this case, the resistors must always be live whenever there is the pos-
sibility of frost (machine in standby mode).
