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7.5.3
Handbook
For more information about some possible configurations, contact our offices and ask for the handbook, which collects a series of
recommended drawings of plants that have been highlighted regarding the installation configuration of our high efficiency heat
pumps. The "Handbook" shows also the symbiotic potential with some of our products present in the catalogue.
7.5.4
Hydraulic circuit
i-HP 0125 / i-HP-LT 0125
i-HP 0135 / i-HP-LT 0235
-HP 0250F / i-HP 0250 / i-HP-LT 0250
i-HP 0260 / i-HP 0270
A
Plate heat exchanger
B
Water flow switch
C
Service valve
D
Inlet pressure gauge
E
Outlet pressure gauge
F
Air vent valve
G
Safety valve
H
Circulating pump
7.5.5
Drainage connection
All i-HP units are adopt drain holes on the basement for the discharge of the condensate that may leach from the pipes of the
hydraulic and refrigerant circuits, and to discharge the water generated during defrosting cycles.
7.5.6
Plant circuit loading
WARNING: Verify all the charging/topping up operations.
WARNING: Before beginning the charging/topping up operation of the plant circuit, disconnect the unit from the
electric power supply.
WARNING: The charging/topping up of the plant circuit must always be done under controlled conditions of pressure
(max 1 bar). Make sure that you have installed on the line of charging/topping up a pressure reducer and a relief
valve.
WARNING: The water on the charging/topping up pipe must be suitably pre-filtered from any impurities and
suspended particles. Make sure that you have installed a cartridge filter removable.
WARNING: Before beginning the charging/topping up operation, unscrew the plugs of the air vent valve. Tighten the
plugs after finishing the operation of charging/topping up of the plant circuit system.
7.5.7
Plant drainage system
In the case when it is necessary to unload the plant, close at first the inlet and outlet manual gate valves (not supplied) and then
remove the pipes that are disposed externally on the water inlet and on the water outlet in order to spill away the liquid contained
in the unit (in order to make easy the operation, it is recommended to install externally two draining valves, on the water inlet and
on the water outlet, between the unit and the manual gate valves).
1
During the operations of charging/topping up, the plugs of the air vent
valves must be partially unscrewed to allow air to flow freely out of the
valves.
(1) Plug of the air vent valve
You can use the service valve, when it is necessary to refill the plant or
adapt the concentration of glycol. Unscrew the plug (cap) of the service
valve and connect to the hose a pipe of 14 mm (inner diameter)
connected to the water network, and then fill the system by
unscrewing the knurled nut. When the operation is concluded,
retighten the knurled nut and screw on the plug. In any case, we
recommend you to use for the water loading of the plant an external
tap whose arrangement is by the installer.
Cap with gasket
Knurled nut
