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FOSHAN SHUNDE ENS ELECTRIC CO LTD
Installation of indoor heating and cooling equipment
•
Indoor heating and cooling equipment such as fan coils, radiator heating or floor heating, should be
installed in accordance with relevant regulatory requirements, engineering design drawings, and the
manufacturer's installation instructions.
•
Use soft connectors to connect the unit with the indoor heating and cooling equipment.
•
Install condensate water drain pipes to the indoor fan coil units with smooth drainage lines for the
condensate water to flow easily.
Water pipe connections
•
Water pipe material should be heat resistant and rust-proof. This can be stainless steel, copper,
aluminium, hot water PPR pipes, etc according to relevant standards.
•
The choice of pipe size should match the heat pump inlet and outlet with the pipework
of the system, and follow the relevant standards.
•
The hot water storage and bu
ff
er tank drain port and pressure and temperature relief valve should be
installed to allow for proper drainage according to relevant standards.
•
The hot water storage and bu
ff
er tank must be installed with an isolating valve to allow for
maintenance.
•
The water pipes should be arranged with smooth bends to reduce pressure loss in the system.
•
The water main inlet should be fitted with a one-way valve and isolating valve, or Duo valve.
•
The water main inlet should be fitted with a water filter (note the Duo valve may have a water filter).
•
The water outlet of the unit should be connected to the solar flow port on the hot water storage tank
with solar return port connected to the water inlet of the unit.
•
The hydronic closed loop of the bu
ff
er tank should be connected to a manifold that is in turn
connected to the hydronic flow and return ports of the bu
ff
er tank. The bu
ff
er tank should be
connected to the unit via 3 way valves in the same way as the hot water storage tank is connected
(refer schematic diagrams in Section IV).
•
After the water flow and return pipes are connected to the hot water storage tank and bu
ff
er tank, the
system should be tested at water supply pressure to ensure that the system does not leak. If
satisfactory, then insulate all hot water fittings and complete the installation. 6.11 In order to discharge
all air from the hydronic water circuit, an automatic exhaust valve should be installed at the highest
point.
•
An expansion vessel and automatic stop valve should be installed into the hydronic system and
located indoors in areas with sub zero temperatures to prevent possible cracking of the water pipes
and valves when not in use in the winter.
•
It is recommended that a water thermometer and water pressure gauge be installed in the flow and
return lines to the unit to monitor key operational parameters.
•
Note
:
•
The water pipes should be subjected to a pressure test before operation of the hydronic system.
•
The water pressure of the hot water and hydronic system should not exceed 500kPa.
•
The Monoblock unit allows for water temperature up to 60 deg C.
•
Water should drain from the pressure and temperature relief valve to a drainage pipe.
•
The pressure and temperature relief valve should be periodically exercised by gently pulling the lever
up. This will help to remove possible accumulation of calcium carbonate, and ensure that the valve is
working properly.
•
Install one-way valves, filters, pressure and temperature relief valves, and any other plumbing fittings
consistently with the marked flow direction and in accord with relevant standards.