Unical HP OWER 60, User'S And Installer'S Manual

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HP_OWER
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The INVERTER system allows to reduce the plant’s water content to the minimum, that is from the usual value 12-15 l/kW to 18
liters for the 6kW model or to 25 liters for the 9kW model or to 35 liters for the 12kW model and to 45 liters for the model
15kW, in ABSOLUTE,. Because of the reduced water content, the HP_OWER
units can be also installed in plants without water
tank with advantages in terms of the appliance’s reduced size, the installation space, heat loss and installation and
maintenance costs.
5.4.1 Drainage connection
All HP_OWER units have been designed to use their own base as a drain pan; a plastic pipe fitting is standard provided to be
installed onto the lower part of the unit in the special housing enabling the connection of a drainage pipe.
Each unit is also provided, on the basement of the hydronic kit (accessible from the right sides panels), with a hole that can allow
to drain any condensation that may escape from plumbing pipes. As well as the pipes are well-insulated, the production of
condensate is however very low and therefore the connection of a drainage pipe to that hole is not required.
5.4.2 Plant circuit charging
WARNING: Verify all the charging/topping up operations.
WARNING: Before beginning the charging/topping up operation of the plant circuit, disconnect the unit for 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
reducerdevice 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 plug of the air vent valve. Tighten
the plug after finishing the operation of charging/topping up of the plant circuit system.
5.4.3 Plant drainage system
When it is necessary to drain 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
(for easier 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). You also need to connect a hose to the service valve and make sure to fully
discharge the heat exchanger by the mean of the knurled nut .
Drainage pipe fitting Drainage pipe fitting housing Drainage pipe fitting connected to the unit
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 cap of the service valve and connect to the
hose a pipe of 14 mm (inner diameter) connected to the water network, and then
load the system by unscrewing the knurled nut. When the operation is concluded,
retighten the knurled nut and screw on the cap. 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
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