Water heat exchange unit
H - 17
(1) Installation construction
6. Installation construction
Carefully read the following “Cautions Regarding Safety” before beginning the installation work and electrical construction
work.
The precautions given in this test consist of specific [ Warnings] and [ Cautions]. They are all important items regarding
safety, so they must be carried out.
Their meanings are as described below.
Warnings : Indicates situations in which faulty operation could result in the possibility of serious personal injury or
even death.
Cautions : Indicates situations in which faulty operation could result in the danger of personal injury or physical
damage.
● Equipment installation and electrical work should be entrusted to the dealer where this product was purchased, or a
specialist contractor. Incomplete electrical installations carried out by yourself can result in water leaks, electric
shocks or fire.
● The installation and electrical work should be carried out in accordance with “To those undertaking the installation
construction”, “ To those undertaking the electrical construction”. If there is a defect in the installation then this can
result in refrigerant or water leaks, electric shocks, or cause fires.
● The electrical installation should be carried out by a properly qualified electrician, in accordance with “Technical
criteria for electrical equipment”, “Electrical wiring regulations”, “To those undertaking the installation construction”, “
To those undertaking the electrical construction”, and the specification for power supply for gas heat pump air
conditioners, and be certain to provide a dedicated power circuit. If the power circuit has insufficient capacity, or if
there is a defect in the electrical construction then this can result in an electric shock, or cause fires.
● If the water heat exchanger unit is installed in an equipment room or similar, then it must be designed so that if there
is a refrigerant leak the density limit of 0.3kg/m
3
will not be exceeded, in accordance with the installation criteria for
cooling and air conditioning equipment (S0010) published by the High Pressure Gas Safety Institute of Japan.
If this limit is exceeded then either provide an opening to the adjoining room, or provide a gas leak warning device
that operates a ventilation system. If a gas leak occurred in a narrow room and the density limit were exceeded, this
could cause a suffocation accident.
● If a refrigerant leak should occur during installation operations, ventilate the area.
If refrigerant gas comes in contact with flames from a welding torch, then this could generate poisonous gas.
● After installation of the refrigerant piping is complete, carry out a leak test with nitrogen to confirm that there are no
leaks. If refrigerant gas leaks into the room and comes into contact with fan heaters, stoves, etc., poisonous gas could
be generated.
Warning
● When handling refrigerant gas, do not directly touch the gas. This can cause burns due to freezing.
● Thoroughly insulate the refrigerant piping with insulation material in accordance with “To those undertaking
installation construction”. If the pipes are not insulated then this can result in water leaks or burns. (The thick pipe
must be insulated with material for 120
o
C or greater.)
Caution
To Next Page
Loading...
