Hydro Unit
Installation Manual
– 3 –
3 Preparations for installation
■ Parts required to connect this product (Common items)
Category Part Specification Quantity
Water piping
Strainer (water filter) 1" 30 to 40 meshes 1
Drain cock (for water charge) 1
Isolating ball valves
1"
for service 1"
2
Electrical system
Earth leakage breaker for main power supply 30 mA 1
Earth leakage breaker for backup heater 30 mA 1
(Option)
Earth leakage breaker for hot water cylinder
heater
30 mA 1
■ Options required for each function
Purpose
In the Hydro Unit Purchased part
Part name Model name Part name Prescribed specification
Heating – –
Radiator(s), Fan coil(s), Under
floor heating
Heating &Cooling (all
rooms)
– – Fan coil(s)
Heating & Cooling
(partly heating only)
– –
Motorized 2-way valve (for
cooling)
Refer to “Control parts
specifications” on page 13.
Hot water supply
Hot water cylinder
Motorized 3-way valve
Earth leakage breaker
Refer to “Control parts
specifications” on page 13.
150 L
HWS-1501CSHM3-E
HWS-1501CSHM3-UK
210 L
HWS-2101CSHM3-E
HWS-2101CSHM3-UK
300 L
HWS-3001CSHM3-E
HWS-3001CSHM3-UK
2-zone control – –
Motorized mixing valve
Refer to “Control parts
specifications” on page 13.
Circulator pump Other power supply
Buffer tank
Interlocking with boiler – – Boiler
Other power supply.
Signal 12 V input function is
required for boiler.
4 Precautions for safety
■ General safety precautions
Ensure that all Local, National and International regulations are
satisfied.
• Read the “Precautions for safety” carefully before installation.
• The precautions described below include the important items
regarding safety – Observe them without fail.
• After the installation work has been completed, perform a test run
to check for any problems. Follow the Owner’s Manual to explain
how to use and maintain the unit to the customer.
• Turn off the main power supply switch (or breaker) before unit
maintenance.
• Ask the customer to keep the Installation Manual along with the
Owner’s Manual.
■ Refrigerant precautions
• If a refrigerant leak is suspected contact the dealer who supplied
the system, in the case of a recharge of refrigerant ask service
personnel for details of the leak and confirmation of the repairs
completed.
• Generally the refrigerant does not leak, however, if the refrigerant
should leak into a room and a heater or stove burner in the room
is lit, toxic gas may be generated.
• Do not install the system in a location subject to a risk of
exposure to a combustible gas.
If a combustible gas leaks and stays around the unit a fire may
occur.
5-EN
6-EN
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