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Part I. Water Module Operation Manual
1. Safety Summary
Do not perform installation work, refrigerant
piping work, water piping work and electrical
wiring connection without referring to the
installation manual. If the instructions are not
followed, it may result in water leakage,
electric shock or fire.
● Do not charge oxygen, acetylene or other
flammable and poisonous gases into the
refrigerant cycle when performing leakage test
or air-tight test. These types of gases are
extremely dangerous and can cause an
explosion. It is recommended that
compressed air, nitrogen or refrigerant be
used for these types of tests.
● Do not pour water into water module. These
products are equipped with electrical parts. If
poured, it will cause a serious electrical shock.
● Do not open the service cover or electrical box
of water module without turning OFF the main
power supply.
● Do not touch or adjust safety devices inside
the units. If these devices are touched or
readjusted, it may cause serious accident.
● Refrigerant leakage can cause difficulty with
breathing due to insufficient air. Turn OFF the
main switch, extinguish any naked flames and
contact your local dealer, if refrigerant leakage
occurs.
● Air-tight test
The refrigerant (fluorocarbon) for the units is
nonflammable, nonpoisonous and inodorous.
Leaked refrigerant meeting naked flame can
generate poisonous gases. The refrigerant
gas is heavier than air. If there is full of
refrigerant gas near ground, it may cause
asphyxia.
● The tion and operational system shall secure
safety against refrigerant leakage according to
local regulations and standards.
● Use an ELB (Electrical Leakage Breaker) with
medium sensing speed or above, with the
acting time 0.1s or less. If not used, it will
cause an electric shock or a fire
● Connect refrigerant piping securely before the
compressor starts running. The refrigerant
piping for repair should only be moved,
handled and removed after compressor stops.
● Do not short circuit the protective devices
when the unit is running. If so, it may result in
serious accident such as fire.
● Do not use sprays, such as insecticide, lacquer,
hair spray or other flammable gases. within
approximately one (1) meter from the units.
● If circuit breaker or fuse is often activated, stop
system and contact your local dealer.
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Check that the ground wire is securely
connected. If the unit isn’t correctly grounded, it
leads to electric shock. Do not connect the
ground wiring to gas piping, tap water piping,
lightning conductor or ground wiring for
telephone.
● Connect a fuse of specified capacity.
● Before performing any brazing work, check to
ensure that there is no flammable material
around. When using refrigerant, be sure to wear
leather gloves to prevent cold injuries.
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Protect the wires, electrical parts, etc. from rats
or other small animals. If not protected, rats may
gnaw at unprotected parts and which could lead
to a fire.
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Use specified cable between units. If not, it may
lead to electrical failure or a fire.
● Fix the cables securely and ensure that the
terminals are tightened by the specified torque.
External forces on the terminals could lead to
loosening and a fire or electrical failure.
● Install the wall-hung part of water module on a
place firm enough indoor. If not, water module
may drop and cause personal injury or machine
damage.
● Water pump sound of water module and
refrigerant flow sound should be taken into
account while selecting installation position.
● Do not install water module below freezing point.
● Install water module where the wire controller
can easily operate.
● Do not install the unit where there are oil, steam
gas, organic solvent and corrosive gases
(ammonia, sulfide and acid etc), because
corrosion may cause refrigerant leakage,
electrical failure, performance degradation and
machine damage.
● Install specified accessories and parts. If not, it
may cause water leakage, electric shock, fire or
malfunctioning of water module.
● The installation manual and all relevant rules
and criteria should be followed for the electrical
installations. If not, it may lead to electrical
failure or a fire due to insufficient capacity or
nonconformance.
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