Mitsubishi ESA30EH2-25 User manual

Manual No.'22・HM-T-419
TECHNICAL MANUAL
AIR TO WATER HEAT PUMP
Q-ton
Natural refrigerant CO2water heater
Including hot water recirculation system
ESA30EH2-25

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CONTENTS
1. GENERAL DESCRIPTION ............................................................................... 4
1.1 Mechanism of CO2 heat pump water heater for commercial use ........... 4
1.2 As for hot water storage unit ...................................................................... 5
1.3 About ECO MODE ....................................................................................... 5
1.4 CO2heat pump water heater: Operation chart .......................................... 6
1.5 Feature of natural refrigerant CO2 .............................................................. 7
2. SPECIFICATIONS ........................................................................................... 10
2.1 Specifications of product ......................................................................... 10
2.2 Exterior dimensions .................................................................................. 26
2.3 Inner structure ........................................................................................... 29
2.4 System diagram ........................................................................................ 32
2.5 Electrical wiring ......................................................................................... 33
2.6 Heating system performance charcteristics
for the operation to top up with recirculation loop................................... 34
2.7
Performance correction method by the effects of outdoor relative humidity
48
2.8 Operation sound ....................................................................................... 49
2.9 Control ....................................................................................................... 53
2.10 Technical infromation of European regulations ....................................... 69
(1) Lot1 ......................................................................................................... 69
(2) Lot11 (Grandless circulators) ................................................................. 72
3. APPLICATION DATA ...................................................................................... 74
3.1 Installation work for air to water heat pump water heater ...................... 74
(1) Before installation .................................................................................. 77
(2) Installation location (Obtain approval from the customer
when selecting the installation area) ..................................................... 80
(3) Carrying in and installation of unit ......................................................... 82
(4) Water piping work .................................................................................. 83
(5) Insulation work and water proofing work unit ...................................... 88
(6) Electrical wiring work for the heat pump unit ....................................... 89
(7) Electrical wiring work for the unvented cylinder .................................. 94

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(8) Control setting ...................................................................................... 101
(9) Commissioning and handover ............................................................. 105
(10) Inspection report .................................................................................. 106
(11) Notabilia for servicing (for CO2heat pump water heater) .................. 108
(12) Connection to existing cylinder ........................................................... 112
(13) The behavior after power recovery ..................................................... 113
(14) Recirculation hot water supply system ............................................... 114
(15) Snow prevention hood ......................................................................... 119
3.2 Installation work for remote control ....................................................... 122
(1) Safety precautions ............................................................................... 122
(2) Accessories & parts prepared at site .................................................. 123
(3) Installation place .................................................................................. 123
(4) Installation and wiring work ................................................................. 124
(5) Main/Sub setting when more than one remote control is used ......... 126
(6) Power source and initial setting .......................................................... 127
(7) Installation settings and Test run ........................................................ 128
(8) User environment (Simplified setting for operation pattern) .............. 130
(9) R/C function settings ........................................................................... 131
(10) Service & Maintenance ........................................................................ 132
3.3 Setting and operation modes for unvented cylinder
and configuration of master-slave units ................................................ 134
3.4 Design guidelines for CO2heat pump water heater with
under floor heating and water recirculation loop .................................. 138
3.5 External input and output ....................................................................... 142
3.6 Guideline for indoor installation of CO2heat pump water heater ......... 146
4. SERVICING ................................................................................................... 150
4.1 General description of servicing ............................................................ 150
4.2 Error code list .......................................................................................... 157
4.3 Troubleshooting ...................................................................................... 160
4.4 Component replacement as a guide ...................................................... 199
4.5 Disassemble and reassemble method ................................................... 200

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4.6 Cleaning procedure of CO2water heater gas cooler .......................... 220
4.7 Method of draining water from gas cooler .......................................... 225
4.8 7-segment display and compressor stop factor ................................. 227
4.9
How to reset the accumulated water pump and compressor operating time .. 235
4.10 Reference for control PCB replacement .............................................. 236
4.11 Operation start/stop condition ............................................................. 236
4.12 When power off in multiple unit system .............................................. 237
4.13 Additional information for tank temperature sensor connection ........ 239
◦Compatibility
Compatibility with previous models
Connectibility of remote control
Due to differences in communication specications, the combination of remote control and heat pump unit is limited as
shown in the table below.
Connectibility of remote control and heat pump unit
Function Overview
This model Previous models
ESA30EH2-25 ESA30EH-25 ESA30E-25
- - /F /C /B /A /1
Space
heating Heating weekly timer Weekly timer for heating operation ○ ○ ×××××
Water
heating
Weekly timer with HW
temperature setting ○ ○ ×××××
Weekly timer × × ○××××
User setting memory ○ ○ ×××××
Anti-legionella control ○※1○ ○ ××××
Return hot water control ○× ×××××
General
Application setting
Usage setting function to
accompany the added
heating operation
○ ○ ×××××
Priority setting
Priority setting of space
heating and water heating
function to accompany the
added heating operation
○ ○ ×××××
Silent mode ○× ×××××
Heat pump unit
ESA30EH2-25 ESA30EH-25 ESA30E-25
Remote
control
RC-Q1EH2 ○ ○※2×
RC-Q1EH ×○×
RC-Q1E × × ○
(Notes)
1. Function available on RC-Q1EH2
2. Some functions will show as invalid when connected to ESA30EH-25

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1. GENERAL DESCRIPTION
1.1 Mechanism of CO2heat pump water heater for commercial use
• The CO2 heat pump water heater for commercial use is a water hater that is composed of a heat pump unit with natural
refrigerant such as CO2 which can produce hot sanitary water with heat pump technology and a hot water storage unit which
can store hot water. A touch panel type remote control applied to this heat pump water heater can control up to 16 units of
heat pump units.
• The way to produce hot water with this heat pump water heater is that the heat energy retrieved from the outdoor air
through the air to refrigerant heat exchanger of heat pump unit heats up the refrigerant and such refrigerant is increased its
temperature and its pressure much higher through the compressor and is transferred to the gas cooler (the refrigerant to water
heat exchanger). In the gas cooler, the refrigerant releases its heat to increase the water temperature and is returned to the air
to refrigerant heat exchanger after depressurized through expansion valve in order to evaporate easily.
On the other hand, the water stored in the hot water storage unit is circulated by the water circulation pump to the heat pump
unit through the connection pipe between the hot water storage unit and the heat pump unit. In the gas cooler, the water
exchanges the heat from the high temperature refrigerant and is heated up to higher temperature. Such hot water is returned
to the hot water storage unit and stored in the hot water storage unit.
The hot water in the hot water storage unit is distributed to the end of hot water supply system for utilizing.
• The power actually consumed is the power supplied to the compressor, fan and water circulation pump only. However the
total energy added to produce hot water is the power actually consumed and the heat retrieved from the outdoor air so that
the consumed energy efciency (COP=Coefcient of Performance) can be more than 1 (one). In other words, this system
allows very high efciency operation. As for this unit, the nominal COP can achieve 4.3 under the condition of outdoor air
temperature 16℃DB/12℃WB, water inlet temperature 17℃ and water outlet temperature 65℃。
• This heat pump water heater does not need any acceptance of notication by local authority due to exempt of regulation.
Retrieve
heat from
the air
Supply
hot water
Heat pump unit Hot water storage unit
Water Circulation
pump
Compressor
Feed
water
Expansion
valve
CO
2
ref.
cycle
Gas cooler
(for heating
water)
Heat exchanger
(cooled by air)
Supply
hot water
Heat pump water heater Hot water storage unit
Water Circulation
pump
Compressor
Feed
water
Expansion
valve
CO
2
ref.
cycle
Gas cooler
(for heating
water)
Heat exchanger
(cooled by air)
Retrieve
heat from
the air
<Merit of CO2 as refrigerant>
• The global warming potential (GWP)=1 (it is good for ecology)
*R410A : GWP=1975 (Based on Regulation (EC) No.842/2006)
• It has following advantage.
Hot water at 90℃ can be produced efciently.
The size of hot water cylinder can be minimized.
The storage of heat can be controlled by adjusting storage water temperature.
The hot water can be used for washing.

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1.2 As for hot water storage unit
Heat pump water heater can be connected to an unvented hot water storage cylinder and it is applicable to various type of hot
water supply system.
What is the unvented hot water storage cylinder?
The storage cylinder is unvented and is pressurized by fully lled hot water.
• The hot water can be supplied by the pressure in the cylinder.
• It is sanitary because the hot water is not exposed to the air.
• It is good for retaining heat
• It is good for supplying hot water to upper oors.
1.3 About ECO MODE
Q-ton provide "ECO MODE" for the solution of energy saving.
The hot water in the storage tank is used effectively to limit the time to start lling up.
This function can be canceled if it does not suit the user's condition.
This function is automatically canceled from next time, when fill up operation start after the HW lower amount limit is
reached.
How to cancel "ECO MODE"
Change software switch setting [P99] from "1" to "0".
How to change the lower HW amount limit
Change software switch setting [P07] to suitable value (%).
About the procedure of changing software switch setting, please see the “INSTALLATION MANUAL for DHW system”
8-(4).
● Operation image of ECO MODE
ON
Below the lower limit
Top up operation will
start after 24 hours.
ECO
ON
OFF
Top up HW amount
operationMODE
Lower
limit
Set
amount
OFF
24hour24hour24hour
Top up operation can
start before 24 hours.
ECO MODE will
be canceled.
Unvented hot water storage cylinder
Operation
to top up Hot water
Water
Water
Hot water

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1.4 CO2heat pump water heater: Operation chart (Ex1. In case of unvented hot water storage system)
21
59 00 59 00 59 00 59 00 59 00 59 00 59 00 59 00 59 00 59 00 59 00 59 00 59 00 59 00 59 00 59 00 59 00 59 00 59 00 59 00 59 00 59 00 59 00 59 00 59
20% 10%
Example: If the sensor No.3 detects [(Set temp.)-(15℃)] or higher, heat pump unit judges the HW amount is 30%.
And if the sensor No.3 detects [(Set temp.)-(20℃)] or lower, heat pump unit judges the HW amount is less than 30%.
50% 40% 30%
HW amount
20%
Heat pump
unit operation
ON
OFF
HW amount
100% 9
8 7 6 5 4 3 2 1
80% 70%
Peak-cut：60%Peak-cut：0%
19 20 21
Minutes
65℃75℃65℃
13 14 15 16 17 187 8 9 10 11 121 2 3 4 5 6
In case of unvented hot water storage system
Clock time Hour 22 23 0
60%
[Preparation for breakfast]
HW amount is decreased
due to much usage of HW.
Operation is started because the
HW amount decreases lower than
target amount of 40%
[Preparation for dinner]
HW topping up
Operation is stopped because
the HW amount exceeds the
target amount of 40%
Target HW amount
▼Stop▼Stop ▼Start▼Start
The unit is operated at most
60% of max rps due to peak-
cut 60%
Solid line：the actual hot
water amount in the cylinder
Operation is stopped
due to peak-cut 0%
Operation is started because the
HW amount decreases lower than
the target amount 60%
Operation is stopped because
the target HW amount
changes from 60% to 40%
HW topping up
Dashed-2 dotted line shows the target
hot water amount per hour set by
remote control.
Circled with shows the HW
amount % to be set by remote control
HW topping up
HW topping operation
There is a possibility of HW
amount drop when increasing
the set HW temp.
[Preparation for lunch]
[Peak-cut ratio changed by remote control]
[Storage volume setting by remote control]
Start from 22:00 on previous day Set 100% from 22:00 up to 8:00
Target HW amount is changed from 100% to 60% at 8:00
Supply hot
Heat pump
water heater
[In case of unvented hot water storage system] Feed water
HW amount setting
HW set temp.
Peak-cut setting
HW amount
100%
HW amount
60%
HW amount
40%

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1.5 Feature of natural refrigerant CO2
(1) General characteristics
The general characteristics of CO2 is as follows.
Under the atmospheric pressure, since CO2 is gaseous state and has following characteristics, be careful to handle it.
a) It is colorless and odorless gas, but when interacting with water, it produces mild acidity and irritating odor.
b) When dissolving it with water, it will be mild acidic and may cause metal to corrode.
c) It is heavier than air and remains on the floor in the unvented room.
d) In case of high density, it may have a risk for addiction or suffocation.
e) Carbon oxide gas is effective for fire extinction because of noncombustible and nonflammable gas.
f) Liquefied carbon oxide is ordinarily stored in the bomb at -20℃ under the pressure of 2MPa. It is clear and colorless and
when releasing it into the air, it will be solid “Dry Ice Snow (frozen carbon oxide)” and CO2 gas.
g) Solid carbon oxide is so called “Dry Ice” which is solidified “Dry Ice Snow” mentioned above. Since it has very low
temperature of -78.5℃ under the atmospheric pressure, it may have a risk for frostbite when touching it with one’s bare
hands. And if it gets into someone’s eye, it may have a risk for loss of one’s eyesight. Therefore when releasing it, espe-
cially be careful to handle it.
Appearance Gas: Colorless
Liquid: Clear and Colorless
Solid: Milky white
If releasing the liquid CO2 into the air, it will be a low-temperature solid.
(Dry Ice)
Smell Odorless (When interacting with water, it produces mild acidity and
irritating odor.)
Absolute vapor pressure 1.967MPa (-20℃)
3.485MPa (0℃)
5.733MPa (20℃)
Density of gas 1.977kg/m3(0℃, 0.1013MPa abs)
Since it is heavier than air, it remains on the f loor or in the dimple.
Density of liquid 1.030kg/liter (-20℃, 1.967MPa)
When varying to gas from liquid, it will expand its volume to roughly 500
times. (At purging to the air)
Density of solid 1.566kg/liter (-80℃)
Solid CO2 (Dry Ice) has extremely low-temperature at -78.5℃.
Flash point None
Ignition point None
Explosion characteristics None
Since it is noncombustible and nonammable, it can be used as re
extinguishing gas.
Solubility into water 1.713 literCO2/liter H2O (0℃, 0.1013MPa abs)
1.194 literCO2/liter H2O (10℃, 0.1013MPa abs)
0.878 literCO2/liter H2O (20℃, 0.1013MPa abs)
CO2 is easily dissolved into water and carbonic water can be made by
dissolving 1 liter of CO2 into 1 liter of water.
Others The liquid CO2 is subject to control by the High Pressure Gas Saving Act.
Table 1.1 General characteristics of CO2

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(2) Characteristics of CO2refrigerant
CO2 refrigerant is so called R744 and its physical property and saturated vapor pressure at each temperature are shown in
table 1.2.
For comparison purpose, it is shown in contrast with those of R410A refrigerant generally using for current air-conditioners.
The feature of CO2 refrigerant is natural refrigerant and is the environment-friendly refrigerant whose ODP is 0 and GWP is as
low as 1. On the other hand, regarding R410A, its ODP is 0 but GWP is much higher than CO2. This point of R410A is inferior
to CO2.
However the pressure of CO2 refrigerant at normal temperature is as high as 6.4MPa that is about 4 times higher than
1.65MPa of R410A. And the critical point of CO2 refrigerant is 31℃ or higher. Therefore even if increasing pressure, it has
a property not to be liquefied.
Above features are suitable for producing hot water by heating up water from low temperature to high temperature at once
and are utilized widely for this purpose.
The pressure of CO2 refrigerant at the temperature above the critical point is decided by the refrigerant temperature and
refrigerant charged amount to the heat pump unit and generally is 12 to 15MPa at the highest. Therefore the attention about
safety to high pressure is needed much more than that for R410A.
Item CO2 (R744) R410A
Composition CO2
R32/R125 (50/50%)
Pseudo azeotropic
mixed refrigerant
Ozone Depletion Potential (ODP) 0 0
Global Warming Potential (GWP) 11975*1
Saturated vapor pressure
(MPa absolute)
-20℃1.97 0.40
0℃3.49 0.80
20℃5.73 1.44
25℃6.40 1.65
30℃7.21 1.88
Boiling point (℃)-78.4 -51.4
Critical temperature (℃)31.0 71.4
Critical pressure (MPa absolute) 7.38 4.90
*1 Based on Regulation (EC) No.842/2006
Table 1.2 Physical property and saturated vapor pressure of refrigerant

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(3) Handling precaution of CO2refrigerant
Regarding the safety considerations to high pressure, be careful not to give any damage on the refrigerant circuit piping of
heat pump water heater during servicing, and to purge a small amount of the refrigerant gradually by adjusting valve open-
ing properly to a place where there is no person. (See 4.1 (2) Method to purge CO2 refrigerant)
CO2 refrigerant itself is harmless, but if sucking the high concentration CO2 refrigerant, it may exert various influences on
the human body.
The influence on the human body exerted by the concentration of CO2 gas in the atmosphere is shown in the table 1.3.
Concentration of CO2 gas
(vol%) Inuence on human body
0.036 Normal air
0.5 Long-term safety limit (Critical concentration by weighted time average calculated
with 8 hours of averaged permissible time)
1.5
It is still endurable for long term without any inuence on workability and basic
physiological function, but it may exert inuence on the metabolism of calcium and
phosphorus.
3.0 Workability comes down and alternation of physiological function will emerge as the
alternation on weight, blood pressure and heart rate.
4.0 Breathing becomes deeper and breathing rate is increased. It will be the state of
slightly gasping that is considerably discomfort feeling.
5.0
Breathing becomes difcult and it will be the state of heavily gasping that will be
unendurable for all persons and make them to feel nausea. Exposure for 30 minutes
results symptoms of poisoning.
7 to 9 It is the allowable limit. It will be the state of severely gasping and leads to
unconsciousness within about 15 minutes.
15 to 20 It produces more serious symptoms, but it is not fatal within 1 hour.
25 to 30 It produces slow respiration, blood pressure reduction, coma, loss of reex action
and paralysis. It leads to death within a few hours.
Table 1.3 The influence on the human body exerted by the concentration of CO2gas in the atmosphere
As shown in the table 1.3, when the concentration of CO2 becomes 3% or more, it leads to the alternation of physi-
ological function and at 7 to 9% it leads to unconsciousness within about 15 minutes and at 25 to 30% it leads coma
and then to death. Therefore be careful for handling it.
Since CO2 refrigerant is heavier than air and is likely to remain at the lower place, when CO2 refrigerant may leak or is
released, be careful to work with taking a measure to prevent from remaining CO2 on the floor by ventilating or such
ways.
The emergent measures at following states are mentioned below.
a) When sucking high concentration CO2 gas.
Move the victim immediately to the place filled with fresh air and warm up him and keep him at rest.
If he is unconscious, loosen his clothing, clear his air way and give artificial respiration and then make him
received treatment by medical doctor promptly.
b) When liquid CO2 stays on the skin
In case of mild frostbite, it is OK to rub down the affected area. However in case of severe frostbite, warm up the
affected area with lukewarm water and wrap it with gauze softly and then make him received treatment by medi-
cal doctor promptly.
c) When liquid CO2 gets into one’s eye
Flush the eye with freshwater immediately and then make him receive treatment by medical doctor promptly.

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Model
Item ESA30EH2-25
Power source －3 Phase 380V±5%, 400V±5%, 415V±5%, 50/60Hz
Operation to top up
(In intermediate season)*1
Heating capacity kW 30.0
(Water amount) L/min 8.97
(Power consumption) kW 6.98
COP － 4.30
Operation to top up
(In cold season)*2
Heating capacity kW 30.0
(Water amount) L/min 5.06
(Power consumption) kW 10.73
COP － 2.80
Operating sound pressure (In intermediate season)*1、3dB(A) 58
Operating sound power (In intermediate season)*1dB(A) 70
Exterior dimensions
Height mm 1690
Width mm 1350
Depth mm 720 ＋35 (Water pipe connection)
Current Max Ａ21
Starting Ａ5
Unit weight kg 375 (During operation 385)
Color Stucco white (4.2 Ｙ7.5/1.1approx.)
Compressor Type×Pcs.Hermetic inverter compressor×1
Nominal output kW 6.4
Refrigerant Type R744 (CO2)
Charged amount kg 8.5
Refrigerant oil Type MA68
Charged volume cc 1200
Crankcase heater W 20
Anti-freezing heater
for water pipe W 21×3
for drain pan W 40×2
for drain hose W16×3
Heat exchanger ,Air side Copper pipe straight n type
Heat exchanger ,Water side
(Gas cooler)
Type Copper pipe coil, indirect heat exchanger
Possession quantity of water kg 10
Fan
Type Axial ow type (direct coupled motor)×2
Output×Pcs W 386×2
Air volume m3/min 260
External static pressure Pa 50
Water pump
Type×Output Non-self-suction spiral type inverter pump×95W
Materials contacting to water PPS, SUS 306
Actual pump head m (kPa) 5m(49kPa) @17L/min
Usage temperature range
Outdoor air temperature ℃-25 to+43
Feed water inlet temperature ℃Top up 5-35,Warm up 35-63
Hot water outlet temperature ℃60-90
Water pressure range kPa 500 or lower (Keep water pressure more than 0kPa at the inlet of
heat pump water heater)
Defrost Hot gas type
Vibration and sound proong devices Compressor ;placed on anti-vibration rubber and wrapped with
sound insulation
Protection devices
High pressure switch，over current protection,
power transistor overheat protection and
anomalous high pressure protection
Pipe connection
Feed water inlet Rc3/4 (Copper 20A)*4
Hot water outlet Rc3/4 (Copper 20A)*4
Drain water outlet Rc3/4 (Copper 20A)*4
Electric wiring
Earth leakage breaker 30A, 30mA, 0.1sec
Power cable size □8mm2×4 (Length70m)
Molded-case circuit breaker Rated current 30A, switch capacity 30A
Grounding wire size M6
Remote control wire size 0.3mm2 ×2 cores shielding wire (MVVS)
Design pressure MPa High pressure; 14.0 Low pressure; 8.5
IP code IP24
2. SPECIFICATIONS
2.1 Specifications of product
(1) Heat pump water heater

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(Notes)
1. Performance of operation to top up in intermediate season shows the capacity measured under the conditions that outdoor
air temperature is 16
°C DB/12 °C WB, water inlet temperature is 17 °C and hot water outlet temperature is 65 °C .
2. Performance of operation to top up in cold region shows the capacity measured under the conditions that outdoor air
temperature is -7
°C DB/-8 °C WB, water inlet temperature is 5 °C and hot water outlet temperature is 90 °C excluding
heater for anti-freezing water (191W).
3. Operating sound shows a value measured at 1m in front of the unit and 1m above the oor in anechoic room where the
sound is resonated a little. Accordingly if the unit is installed on actual site, it is normal that the measured sound there is
higher than the value shown above, because it is inuenced by surrounding noise and echo in the room.
4. Pipe size 20A=DN20=20mm=3/4in
5. The actual hot water outlet temperature may vary ±3
°C from target temperature according to the change of outdoor
air temperature and water inlet temperature And then if feed water inlet temperature is 30
°C or higher and outdoor air
temperature is 25
°C or higher, hot water outlet temperature may be controlled not to increase too high.
6. Please use the clean water. The water quality should follow the standard which MTH species.If the water quality is out of
the standard, it may cause troubles such as scale buildup and/or corrosion.
7. These articles mentioned above may vary without any notice according to the development status.
8. Electrical installation work must be performed by an electrical installation service provider qualied by a power provider
of the country. Electrical installation work must be executed according to the technical standards and other regulations
applicable to electrical installations in the country.

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(2) Remote control for heat pump water heater (Model : RC-Q1EH2)
NOTE: Please use ESA30EH2 together with the remote control “RC-Q1EH2”.
(a) Outline dimensional drawing
In this figure, all information are displayed on the LCD at the same time for explanation, but, actually, only the necessary information is displayed at that time.
Installing spaceDimensions to mount a remote control
Display part of icon
Display part of time and remote control name
Schedule setting switch
Run/Pause switch
Operation lamp
Operation switch to fill up
TOP button
Setting button for hot
w
ater temperature
Display for hot water amount
Display for usage of hot water storage amount Display part of message
In case of taking out wire from upper left
37 23 23
83.5
120
18.3
19
120
Holes to fix a remote control
Fix 2 positions by selecting one each hole on upper and lower rows from total 5 positions
Dimensions to mount a remote control (viewed from front) 52mm
30mm
120mm
30mm
30mm
In case of taking out
wire from upper center
Keep minimum space for dismounting the remote control cover case Upper, left, right side: 30mm or more Lower side: 120mm or more If using L-shape screw driver: 50mm or more
TOP
Installation of remote control
Please do not install a remote control at the place mentioned below. It may cause malfunction and deformation of remote control. (1) Do not install it at the special surrounding where inammable gas may
generate, intrude, retain or leak.
If the remote control is used in the place where there are a lot of oil, vapor, organic solvent and corrosive gas (ammonia, sulfuric compound, acid and etc), or where acidic or alkaline liquid solution, or special spray, are used, it may cause electric shock, re and failure due to remarkable decrease in performance and corrosion.
(2) Do not install it in the place where much water vapor and/or dew
condensation is generated.
It may cause electric shock, re and failure
(3) If installing a remote control in the hospital and telecommunication
service ofce, be sure to take measures against noise.
Due to the inuence of inverter devices, emergency generator, high harmonic medical equipment, wireless communication equipment and etc, it may cause malfunction and failure of the remote control. On the other hand, due to the influence from remote control to medical equipment and communication equipment, it may cause interference of medical action, interruption of broadcast and harmful effect by noise.
(4) Do not install it on the place where it is exposed direct sunlight. (5) Do not install it near the equipment to generate heat (6) Do install it on the at surface of wall (7) Do not install it on the place where the surrounding temperature can
increase to 40°C or higher or can decrease to 0°C or lower.
It may cause discoloration, deformation, malfunction and failure.
Electric wiring specications
(1) Remote control wire size: 0.3mm2× 2 cores
shielding wire (MVVS)
wire length: Available up to 600m
If the wire length exceeds 100m, be sure to change the size mentioned in following table. However the size passing through the inside of remote control should be 0.5mm or smaller at the maximum and be changed to bigger size just after the wire coming out of remote control. When connecting wires, be sure to connect them securely without any contact failure and without getting moisture intruded.
Length (m) Wire size
Shielding wire (MVVS)
100-within 200m 0.5mm2× 2 cores
Within 300m 0.75mm2× 2 cores Within 400m 1.25mm2× 2 cores Within 600m 2.0mm2× 2 cores
*
As for the function of switches, buttons and displayed icons, please refer the user's manual of remote control RC-Q1EH2 for details.

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(b) List of setting functions
Setting and display item Detailed content
1. Remote control network
1
2
Multiple heat pump water heater control Max. 16 sets of heat pump water heaters in one Superlink network can be
connected to one remote control and controlled by it.
Heat pump water heaters address needs to be set.
Main or Sub remote control setting 2 remote controls can be connected to one remote control network.
One of them is set "Main" and the other one is set "Sub".
2. TOP screen, switch operation
1
2
3
4
5
6
7
Menu Select the item of control, setting, conrm and etc. (See item 4 to 10)
Hot water temperature Set the temperature to top up and the temperature to keep warm
Hot water amount Set the hot water amount. (More/Usual/Less)
Hot water amount Display hot water amount of today and yesterday
Run/Pause switch Start operation or pause operation
Schedule setting switch Set schedule. See item 3 for details
Switch for operation to ll up Set hot water amount 100% and start operation to top up
3. Schedule and function settings
1
2
3
4
5
6
Setting of weekly schedule Set the operation pattern for one week.
Set target hot water amount, time and temperature.
●It is possible to set 8 operation patterns per day
●It is possible to set time at 1 hour intervals.
●It is possible to set all. (Week days/ Saturday & Sunday/All days)
Setting of annual operation pattern Set the operation pattern on a weekly basis
●It is possible to set the driving pattern every week.
●It is possible to set the operation pattern up to one year ahead.
●It is possible to set setting as valid or invalid.
Setting of day off If setting off day, the operation of heat pump water heater to top up becomes
invalid.
●It is possible to set off day in every week
●It is possible to set off day for specific period of time
●It is possible to set off day on specific day.
Setting of peak cut Reduce the power consumption by limiting the max. capacity.
Set the start/end time of peek-cut and the peak-cut %.
●It is possible to set peek-cut for whole week.
●It is possible to set max 4 patterns per day
●It is possible to set time at 5 minutes intervals
●It is possible to select the peak-out % from 0, 40, 60, 80%
●It is possible to set setting as valid or invalid.
●It is possible to set all. (Week days/ Saturday & Sunday/All days)
Setting of silent mode Reduce the noise level by limitting the max. frequency of compressor and fan.
Set the [Start time] and [End time] of the operation to limit the noise level.
●It is possible to set 4 patterns per day.
Setting of Legionela mode Prevents legionella by increasing tank temperature up to at least 70℃.
Set the [Starting date] and [Start time] and the frequency of legionella operation.
●
It is possible to set operation intervals. (Once/Every week/Every two week/Every month)
●It is possible to set setting as valid or invalid.
4. Initial settings
1
2
3
4
5
6
7
Clock setting Set or correct the current date and time
● In case of power failure within 80 hours, the clock runs by the built-in battery
for back-up.
Date and time display On/Off, 12H/24H or display position of AM/PM can be set
Contrast The contrast of LCD can be adjusted.
Backlight On/Off and lighting time of backlight can be set.
Controller sound On/Off of beep sound at touch panel operation can be set
Priority setting It is possible to set the priority of HW/Heating.
Summer time Enable/Disable of summer time can be set.

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Setting and display item Detailed content
5. Administrator settings Administrator password is required
1Enable/Disable setting ●Permission/prohibition setting of the following operations can be set.
[Run/Pause], [Setting of HW temp.], [Change amount of top up],
[Manual operation to ll up], [Setting of schedule],
[Select the language], [Heating operation], [Heating set temp]
2Night tariff setting In order to calculate the power consumption in day/night time, the time zone
applied night tariff can be set.
3
4
5
6
7
HP unit selection The heat pump water heater to be displayed on RC can be selected.
RC display setting R/C display setting can be set.
[Name of R/C], [Name of HP unit], [Defrost operation display],
[Status of HW amount], [HW amount display setting]
Step size of HW temperature Step size of HW temperature (at 5°C or 1°C intervals) can be set.
(Factory default is 5°C)
User environment By selecting the operation pattern of typical business type, the detailed operation
pattern can be set easily.
Change administrator password Administrator password can be changed
8 Operation lamp setting It is possible to change the color of R/C lump.
9 Upper limit setting of HW temp. Set the upper limit value for the hot water storage temperature.
10 Open tank information Display the detection temperature of open tank temperature sensor.
11 Application setting Application setting can be changed. (HW, Heating, HW&heating)
12 Cancel weekly schedule (HW) This function is used when the HP unit is controlled by external control.
6. Installation settings Service password is required.
1
2
3
Installation date If installation date is registered, next service date is displayed.
Company information Contact company can be registered on the remote control.
●Name of contact company can be registered.
●Phone No. of contact company can be registered.
Test run It is possible to start test run.
Primary setting of operation It is possible to start [Primary setting of operation].
Water pump test run It is possible to start [Water pump test run].
Compressor Hz xed operation It is possible to operate at a xed compressor Hz.
7. RC function settings Service password is required.
1Main/Sub of RC Main or Sub remote control setting can be done.
2External input When multiple heat pump water heaters are connected, the applicable range of
water heaters of CnT input signal can be set.
3 Auto-restart Control contents after recovering from power failure can be set.
8. Service & maintenance Service password is required.
1No. display of unit Max. 16 sets of heat pump water heaters can be connected to a remote control.
The connected heat pump water heaters can be checked.
2Next service date Next service date can be registered. On the service date, contact company is
displayed on RC.
3Error display Up to 14 cases of error history (error code and date of occurrence) can be
displayed.
4Save HP unit setting Setting contents of heat pump water heaters connected to the remote control can
be saved in remote control as backup.
5Special setting [CPU reset] [Restore of default setting] [Touch panel calibration]
6 System OFF All heat pump water heaters in one system can be stopped.
7Operation data Status list of connected units and operation status of each unit can be checked.
9. Contact company Contact company and phone No. are displayed.
10. Check of RC setting Current setting list of RC and HP water heater can be checked.
11. Select the language Select the language to be displayed on the R/C.

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Back
Select the item Back
(c) Setting method of remote control for heat pump water heater
[At the initial use]
1) After the completion of installation, check that the feed water is surely supplied to the hot water supply system rstly and then
turn the power ON.
After the completion of initial setting, TOP screen (Screen 1-1) is displayed on the remote control. ＊Operation mode is [Pause]
[Menu]→[Installation setting]→[Input the service password (9999)]→[Test run (Screen 1-2)]→[Water pump test run (Screen 1-3)]
From this screen please start test run of water pump.
Complement: The test run of water pump can be started from the control of heat pump water heater as well. Refer to user’s
manual for heat pump water heater for details.
[Caution 1]
If starting operation by pushing Run/Pause switch before the end of water pump test run, the heat pump water heater starts the
operation to top up in case that the current hot water amount is less than the set amount.
Since it may cause failure of heat pump water heater, do not start operation until completion of water pump test run.
2) When starting test run of water pump, the message of “In water pump check operation” is displayed on the TOP screen (Screen 2-1).
Purge air by operating test run of water pump.
Be sure to check the drain comes out by opening drain valve and air purge valve.
[Screen 2-1]
3) After completing test run of water pump, stop test run of water pump.
If pushing Run/Pause switch on the panel of remote control to stop operation, the water pump test run is stopped. (Screen 3-1)
4) Start the “Primary setting of operation” of the heat pump water heater.
[Menu]→[Installation setting]→[Input the service password (9999)]→[Test run (Screen 4-1)]→[ Primary setting of operation (Screen 4-2)]
According to these procedures, please start the primary setting of operation.
Complement: The primary setting of operation can be started from the control of heat pump water heater as well. Refer to user’s
manual for heat pump water heater for details.
[Screen 1-1] [Screen 1-2] [Screen 1-3]
[Screen 4-1] [Screen 4-2]
Back
Select the item Back
[Screen 3-1]

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5) When starting the primary setting of operation, the message of “In Primary operation”
is displayed on the TOP screen (Screen 5-1).
When completing the primary setting of operation, the heat pump water heater is
stopped and the message of “In primary operation” is disappeared (Screen 1-1) .
Be sure to check the drain comes out by opening drain valve and air purge valve.
[Caution 2]
Since the heat pump unit is paused after the end of this operation, the heat pump
water heater does not start the operation to top up, even though the current hot water
amount is less than the set amount.
However, for anti-freezing of water in the pipe, water pump and compressor may start
operation.
6)
After completion of primary setting of operation, set the necessary items with the remote
control and start operation of the heat pump water heater by pushing
Run/Pause switch.
(Screen 3-1)
When the heat pump water heater is operating to top up, the message of “It is in
operation to top up” is displayed on the TOP screen (Screen 6-1).
Complement: As for the setting method by remote control, please refer to the next
item [Setting example] or user’s manual.
[Setting example]
[Setting method] and [Operation pattern of heat pump water heater] for following setting conditions are shown below.
① The hot water temperature is 90°C
② The operation to ll up is done from 23:00 to 7:00 of off-peak rate period for business use.
③ In order to store at least 30% of full hot water amount by 16:00, the setting of hot water amount is changed to 30% at 13:00.
④
The peak-cut timer is set [10:00-13:00] for the operation to top up not to be done during peak-cut period.
⑤
Since Sunday is holiday, hot water is not used. (Setting of day off)
⑥ In order to consume much more hot water on Saturday, the hot water amount shall be increased.
1) Setting method (＊Please see user’s manual for details)
The positions of buttons and switches are shown in the right gure.
The setting of above setting conditions (1) to (6) can be set by pushing the buttons
and switches shown in the right gure.
a) Set the hot water temperature at 90°C
① When tapping the [HW temp.] button on the TOP screen, the [Setting of HW
temp] menu screen is displayed. (Screen ①-1)
② When tapping [Setting temp to top up], [Setting temp to top up] screen is
displayed (Screen ①-2).
③ Set the hot water temperature by tapping ▲▼ buttons and tap
Set button. (Screen
①-2)
[Screen 5-1]
[Screen 6-1]
[Screen ①-1] [Screen ①-2]
Back
Select the item
Back
Tap ▲▼ to set temp &tap〔Set〕
Set
90

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b) Set the time period for the operation to fill up
① When pushing Schedule setting switch, [Setting of schedule] menu screen is displayed. (Screen ②-1)
② When tapping [Setting of weekly operation pattern], the [Weekly timer] screen is displayed. Tap All days buttom. (Screen ②-2)
The screen for conrming the set contents is displayed (Screen ②-3)
<Complement> Select the day to be set from Week days, Sat, Sun, All days and Each day buttons.
Week days Set all days from Monday to Friday
Sat, Sun Set the days of Saturday and Sunday
All days Set all days from Monday to Sunday
Each day Set each day
③ Change 22:00 of the set item 1 on [Screen ②-3] to 23:00 in order to ll up hot water from 23:00 to 7:00.
When tapping the line of [1/22:00/100%], the column of set item 1 is highlighted in reverse. Tap Change button. (Screen ②-4)
④ [Hot water amount setting] screen is displayed.
For setting the time, tap Set button. (Screen ②-5)
Since [Time setting] screen is displayed, tap [23:00] and tap Set button. (Screen ②-6)
⑤ [Hot water temperature setting] screen is displayed. Tap No setting button. (No setting means that HP unit operates with the
same HW temperature the last action.)
⑥ When tapping Set button, the screen for conrming the set contents is displayed. (Screen ②-8)
In order to ll up hot water from 23:00 to 7:00, change 4:00 of the set item 3 to 7:00 like as item ③.
⑦ After changing the time, tap Set button on the screen for conrming the set contents. (Screen ②-8)
⑧ Since the acknowledge screen for conrming all set contents is displayed, tap Yes to save all settings. (Screen ②-9)
[Screen ②-1] [Screen ②-2] [Screen ②-3]
[Screen ②-4] [Screen ②-5] [Screen ②-6]
[Screen ②-7] [Screen ②-8] [Screen ②-9]

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c) Set the hot water amount
① Carry out the same procedure as [(2)-①and ②] and display the screen for con rming the set contents. (Screen ②-3)
When tapping Next button, the screen for con rming the set content of next time period. (Screen ③-1)
② Change the setting of hot water amount at 13:00 to 30% in order to top up to 30% of the full hot water amount until 16:00.
Tap the line of [6/13:00/10%] and then tap Change button. (Screen ③-1)
③ Since [Hot water amount setting] screen is displayed, set 30% by tapping ▲ ▼ buttons and tap Set button. (Screen ③-2)
④ Since the screen for con rming the set contents is displayed, save the settings according to the same procedure as item [(2)-⑧].
(Screen ③-3)
d) Set Peak-cut timer
① When pushing Schedule setting switch on the panel of RC, the [Setting of schedule] menu screen is displayed. (Screen ②-1)
② When tapping [Setting of peak-cut] on the screen ②-1, [Peak-cut timer] screen for selecting the day of the week is displayed.
Tap All days button. (Screen ④-1)
The screen for con rming the set contents is displayed. (Screen ④-2)
<Complement> Select the day to be set from Week days, Sat, Sun, All days and Each day buttons.
③ Set the Peak-cut % to 0% in order for the heat pump unit not to be started operation to top up from 10:00 to 13:00.
When tapping the line of [1/Invalid/ ], the column of set item 1 is highlighted in reverse. Tap Change button (Screen ④-2)
④ The detail setting screen for setting the contents of Peak-cut timer is displayed.(Screen ④-3)
[Screen ③-1] [Screen ③-2] [Screen ③-3]
[Screen ④-1] [Screen ④-2] [Screen ④-3]
⑤ Set the Valid/Invalid , Peak-cut % ,[Start time] and [End time] with each button on the detail setting screen.
• In order to set “Valid”, by tapping the Invalid button to change to Valid . (Screen ④-4)
• Tap the Peak-cut % button and set the “Peak-cut %” to 0% by tapping ▲ ▼ buttons. (Screen ④-5)
• Tap the Change button and set Start time at 10:00 and End time at 13:00 by tapping ▲ ▼ buttons. (Screen ④-6)
[Screen ④-4] [Screen ④-5] [Screen ④-6]

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⑥ After the each setting is done, the detail setting screen is displayed. Tap the Set button. (Screen ④-7)
⑦ Since the [Setting contents con rmation] screen is displayed, tap the Set button.(Screen ④-8)
⑧ Group setting acknowledge screen is displayed. Tap the Yes button. (Screen ④-9)
e ) Set all Sundays to day off
① When pushing Schedule setting switch on the panel of RC, the [Setting of schedule] menu screen is displayed. (Screen ②-1)
② When tapping the [Setting of day off] on screen ②-1, the [Setting of day off] menu screen is displayed. Tap the [Set every
week]. (Screen ⑤-1)
③ Since the screen for selecting the day is displayed, tap the blank column just below Sunday to be day off. The setting of
Sunday is changed to day off and “ ” is displayed in the blank column just below Sunday. (Screen ⑤-2)
<Complement>
The display in the blank column just below the day to be set day off is changed over “ ” ⇔ “ (blank) ” at every tapping.
[Screen ④-7] [Screen ④-8] [Screen ④-9]
[Screen ⑤-2][Screen ⑤-1]
Back
Select the item
Change over day off “ ”
⇔ cancel “ (blank) ”
f ) Increase the HW amount uniformly
When setting HW amount “More”, the setting value of HW amount becomes 1.2 times of the usual setting. When setting HW
amount “Less”, the setting value of HW amount becomes 0.8 times of the usual setting.
① When tapping HW amount % button on the TOP screen (Screen ⑥-2), the [HW amount setting] screen is displayed. (Screen
⑥-1)
② When tapping the blank column just below Saturday to be set “More”, the “More” is displayed. (Screen ⑥-1)
<Complement>
The display in the blank column just below the day to be set is changed over “More” ⇒ “Less” ⇒ “ (Blank)* “ at every tapping.
(* “Blank” means usual setting)
100% is the maximum value to be able to set “More” and 10% is the minimum value to be able to set “Less”.
③ When setting of HW amount is “More” (or “Less”), the massage of “Storage amount setting [More] (or [Less])” is displayed
on the TOP screen. (Screen ⑥-2)
[Screen ⑥-1] [Screen ⑥-2]
When “More” or “Less” is set,
the message is displayed on
the TOP screen like this.