SHERPA SHW
Sanitary water heat pump
18
Installation diagram in case of solar water circulation
Note: solar heat exchange coil is present only in SHW 300S unit
9.7
ELECTRICAL CONNECTIONS
Check out that the power supply meets the unit’s electric nominal data (tension, phases, frequency) reported on the technical
label of the unit. Power connections have to be made in accordance to the wiring diagram enclosed with the unit and in
conformity with the national and international norms in force (providing equipments as general magnetothermic circuit breaker,
differential circuit breakers for each electric line, proper grounding for the plant, etc.). Power cables, electric protections and line
fuses have to be sized according to the specifications listed in the wiring diagram enclosed with the unit and in the electrical data
contained in the table of technical characteristics (see Paragraph 16).
WARNING: The power supply have to respect the listed limits: failing this, warranty will terminate immediately.
Before any operation on the unit, be sure that the power supply is disconnected.
WARNING: The supply voltage’s fluctuations can not exceed ±10% of the nominal value. Should this tolerance not be
respected, please contact our technical department.
WARNING: If external circulation pump is connected to the system, the external water flow switch have ALWAYS to
be connected following the indications listed in the wiring diagram. Never bridge the water flow switch connections in
the terminal board.
Use the specified electrical wires and attach the wires firmly to the terminal board (connection in such a way that the
stress of the wires is not applied to the sections): incorrect connection and fixing could cause a fire.
Perform electrical work according to the installation manual and be sure to use a dedicated section, fused with 16A.
If the capacity of the power circuit is insufficient or there is an incomplete electrical circuit, it could result in a fire or
an electric shock.
The unit must always have an earthed connection. If the power supply is not earthed, you may not connect the unit.
Never use an extension cable to connect the unit to the electric power supply.
If there is no suitable, earthed wall socket available, have one installed by a recognized electrician.
Do not move/repair the unit by yourself.
If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or a similarly qualified
person in order to avoid a hazard. Improper movement or repair on the unit could lead to water leakage, electrical
shock, injury or fire.
The installation height of power supply should be over 1.8m, if any water may spatter, the unit can be safe from
water.
