This instruction shows for the installation work of the heat pump water heater and the total hot water supply system.
. If a non-compliant installation
observe all these instructions, because they include important points concerned safety.
Never do it under any circumstances.
Always do it according to the instruction.
installed in a small room.
If supporting the unit at 3-points or applying wrong method for carrying in, it may cause death or severe injury.
Improper hoisting may cause an accident resulting in injury or death by dropping the unit.
.
.
Improper installation may cause an accident due to turnover of the unit.
, and the exclusive circuit shall be used.
.
hold the cable securely in order not to apply unexpected stress on the terminal.
.
And it may cause corrosion of the inside unit that leads malfunction of the unit or refrigerant leak.
Improper water supply work may cause malfunction of the unit or water leak.
If the event of malfunction may happen, it may cause a risk of scald.
WARNING
y.
If the air is mixed in, the high pressure in the circuit becomes extremely high and it may cause burst or serious injury
AC power to the remote controller. V at the maximum.
y.
.
y.
If packing materials is sucked in the other machine located there, it may cause breakdown or abnormal operation.
If leaving packing material without removing nails and metal pieces, it may cause injury.
CAUTION
If touching, it might cause injury.
If leaving packing material without removing nails and metal pieces, it may cause injury.
Improper insulation might cause radiating heat from the surface of the piping and decreasing the hot water temperature.
-purging.
Check if the drainage is correctly done during test run and ensure the space for inspection and maintenance.
If dispose them illegally, it might cause not only to violate the law, but also to have adverse effects on health and environment
.
The deterioration of water quality may cause malfunction of the unit or water leak due to corrosion.
.
It might cause water leak due to corrosion depending on the water quality.
.
Without taking measure for anti-freezing, it might cause breakage of water pipe, components or connecting joints in the system.
Improper treatment might cause serious damage, when water leak occurs.
from HW storage unit and water piping.
If touching, it might cause scald.
irect drain of hot water from the HW storage unit is prohibited. It might cause scald or damage of the packing on the unit side.
At the service and maintenance work, be sure to drain off all hot water in the HW storage unit and in the piping before starting
work.
When replacing valves such as pressure reducing valve, relief valve and other valves, shut the stop valve and drain off hot water
before starting work.
ff the water in the piping of the unit by opening valves for drain and air purge located inside of the unit.
Feature of CO2 refrigerant
The operation pressure of CO2 refrigerant is generalla at the maximum, which is about 4 times high pressure of R410A.
Consideration for safety to high pressure is required more than that for R410A.
P lease be careful not to break the piping of refrigerant circuit of the heat pump unit during service work.
When purging CO2 refrigerant, please purge a small amount to a place where there is no person by opening service valve slightly.
fect the human body.
At more than 3% of concentration it affects the physiological function, at 7% to more than it causes disturbance of consciousness,
CO2 refrigerant is heavier than the air and accumulates easily at lower place. Therefore, if there is a risk of refrigerant leak or when purging
refrigerant, please take measure to prevent CO2 refrigerant fro
First aid under high concentration of CO2 gas
(a) When sucking the high concentration of CO2 gas
Move the sufferer immediately to a place where fresh air can be intake and make his body relaxed and keep him rest
immediately.
(b) When the high concentration of CO2 gas adhere to the skin
If it is a mild frostbite, only rubbing that section is OK. But in case of severe frostbite, warm that section with lukewarm water
and wrap lightly with gauze, and then consult a physician immediately.
(c) When the high concentration of CO2 gas get into the eye
Rinse the eye with fresh water, and consult a physician immediately.
Legal formalities
Water Low
When connecting the HW storage unit with clean water pipe
Consult with the Waterworks Bureau under the jurisdiction of the local government.
CAUTION
ls are handled.
When installing the unit on a roof or a high place, for preventing from a fall, install permanent ladders and handrails at the passage,
and install fences and handrails around the unit.
If not, it might cause injury due to falling from the installation place.
o not install and use the unit near the hospital and telecommunication facility where equipments generate electromagnetic
It might cause malfunction or failure of the unit due to the effect of inverter equipments, private power generators, high frequency medical
equipments or radio communication equipments, or may cause harmful effectssuch asinterfering with medical activity or visual and noise
unit to medical equipments andr communication equipments.
If insects or small animals come into the unit and touch the internal electrical wiring of the unit, it might cause malfunction of
P lease ask the customer to keep the surroundings clean.
If leaving corroded or damaged, it might cause a fall of the unit or injury.
•Heavy snow area (When installing the unit in such area, it is n
tion hood.)
y.
ffected by strong winds (Where strong winds blow directly into the unit.)
It might cause damage to plants
ffect to (On a wall near bed room or such area)
ffected by high frequency wave. (near TV set, radio and etc)
ff.
it might affects the environment and might be cause of the claim
In heavy snow area, be sure to install the unit at a high place not to be buried under the snow.
1. Before installation
(Check the model, electrical specifications, piping, necessary optional parts and
etc, and install properly.)
Caution
Read this manual before starting installation work and proceed installation work properly according to this manual.
Be sure install the earth leakage breaker. (it should be impulse withstanding type.)
If operating unit by keeping discharge pipe temp sensor, suction pipe temp sensor and pressure sensors removed, compressor may be
broken. Be sure to avoid such operation.
1-1 Standard hot water supply system diagram (for unvented cylinder)
1-2 Component list of hot water supply system (for unvented cylinder)
To shower
Hot water temp sensor
Unvented cylinder
Feed waterDrain
①Heat pump unit
④Wiring kit
⑨Anti-freezing heater
②Remote controller
⑦3-way valve
⑩Air purge valve
⑪Relief valve
⑧Stop valve
⑫Insulation for
unvented cylinder
③
⑥
⑤
Pressure reducing valve
Part name Model General description
①
Heat pump unit
②
Remote controller for heat pump
water heater (Optional part)
RC-Q1E
③
（
Locally procured)
—
page.
④
Wiring kit for unvented cylinder
(Optional part)
MTH-Q1E
(20m length of wire)
or
MTH-Q2E
(10m length of wire)
Connect to the water temp sensor of unvented cylinder
Connect to the 3-way valve for switching to anti-freezing circuit and
control it
⑤
P ressure reducing valve
(Locally procured )
—
Setting pressure
≦
400kP a
Connecting pipe size
≧
32A
If the feed water pressure exceeds 400kP a, be sure to mount it
⑥
Hot water temp sensor
(Optional part)
MTH-Q3E
Mounting or pasting on the unvented cylinder for detecting hot water
temp in the cylinder
⑦
3-way valve (Optional part) MTH-Q4E
⑧
Stop valve of hot water supply
(Optional part)
If the multiple heat pump water heaters are connected, it is necessary
to use at the hot water supply line.
⑨
Anti-freezing water heater
(Locally procured)
—
When outdoor air temp becomes below 0, be sure to install this
⑩
Air purge valve
(Locally procured)
—
purging the air in the hot water system which is generated during
heating up the water in the unit or is mixed in the system when
feeding water. E ach valve is required for each cylinder.
⑪
Relief valve (Locally procured)
—
preventing from increasing pressure in the system during heating
up the water.
Wr.
⑫
Insulation (Locally procured)
—
Heat resistance
≧
the cylinder shell: or thicker glass wool whose density is
3
.
the cylinder end plate: mm or thicker glass wool whose
3
.
the water piping: 30mm or thicker glass
wool whose density is
3
.
3. APPLICATION DATA
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