Toshiba HWT-601XWHM3W-ETR User manual

Model name:
Outdoor unit
HWT-401HW-E(TR)
HWT-601HW-E(TR)
HWT-801HW-E(TR)
HWT-1101HW-E(TR)
HWT-801HRW-E
HWT-1101HRW-E
AIR TO WATER HEAT PUMP
Hydro unit -Wall Mounted Type-
HWT-601XWHM3W-E(TR)
HWT-601XWHT6W-E(TR)
HWT-1101XWHM3W-E(TR)
HWT-1101XWHT6W-E(TR)
HWT-1101XWHT9W-E(TR)
Service Manual
FILE No. AE0-2101W

1
Contents
1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2 Construction views (External views) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2-1.Hydro unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2-2.Outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2-3.Hot water cylinder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3 Refrigeration cycle / Water system diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3-1.Water system diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3-2.Refrigeration cycle system diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4 Wiring diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4-1.Hydro unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4-2.Outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4-3.Hot water cylinder unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5 Key electric component rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5-1.Hydro unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5-2.Outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5-3.Hot water cylinder unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5-4.Water heat exchange control board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5-5.Outdoor control board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6 Refrigerant (R32) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6-1.Safety during installation / servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6-2.Refrigerant piping installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
6-2-1.Piping materials and joints used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
6-2-2.Processing of piping materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6-3.Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
6-3-1.Required tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
6-4.Recharging of refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
6-5.Brazing of pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6-5-1.Materials for brazing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6-5-2.Flux . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
6-5-3.Brazing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
6-6.Instructions for re-use piping of R22 or R407C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6-6-1.Basic conditions needed to reuse the existing pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6-6-2.Restricted items to use the existing pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6-6-3.Branching pipe for simultaneous operation system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6-6-4.Curing of pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6-6-5.Final installation checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6-6-6.Handling of existing pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6-6-7.Recovering refrigerant. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

2
6-7.Charging additional refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6-7-1.[Assumed gas leak]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6-7-2.[Limiting the additional charge] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6-7-3.[Cautions on charging additional refrigerant] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6-8.General safety precautions for using R32 refrigerant. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6-8-1.Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6-8-2.Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6-8-3.Labelling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
7 Operational description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
8 Method of defect diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
8-1.Matters to be confirmed first . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
8-1-1.Check the power supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
8-1-2.Check for any miswiring of the connection cables between the hydro unit
and the outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
8-1-3.About the installation of the temperature sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
8-2.Non-defective operation (program operation) … No fault code display appears.. . . . . . . . . . . . . . 96
8-3.Outline of the determination diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
8-3-1.Procedure of defect diagnosis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
8-3-2.How to determine from the check code on the remote controller . . . . . . . . . . . . . . . . . . . 97
8-3-3.How to cancel a check code on the remote controller . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
8-3-4.How to diagnose by error code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
8-4.Diagnosis flow chart for each error code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
8-4-1.Hydro unit failure detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
8-4-2.Outdoor unit failure detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
8-4-3.Temperature sensor, temperature-resistance characteristic table . . . . . . . . . . . . . . . . . 137
8-5.Operation check by PC board switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
8-5-1.Operation check mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
8-6.Brief method for checking the key components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
8-6-1.Hydro unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
8-6-2.Outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
9 Hydro unit and outdoor unit settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
10 Replacement of the service PC board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
11 How to exchange main parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
12 For cooling installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
13 Periodic inspection items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
14 Part exploded view, part list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219

3
Generic denomination: Air to Water Heat Pump
Definition of qualified installer or qualified service person
The Air to Water Heat Pump must be installed, maintained, repaired and removed by a qualified installer or
qualified service person.
When any of these jobs is to be done, ask a qualified installer or qualified service person to do them.
A qualified installer or qualified service person is an agent who has the qualifications and knowledge
described in the table below.
Agent Qualifications and knowledge which the agent must have
Qualified installer
(*1)
• The qualified installer is a person who installs, maintains, relocates and removes the Air to Water Heat Pump
made by Toshiba Carrier Air-conditioning Europe Sp. z o.o..
He or she has been trained to install, maintain, relocate and remove the Air to Water Heat Pump made by
Toshiba Carrier Air-conditioning Europe Sp. z o.o. or, alternatively, he or she has been instructed in such
operations by an individual or individuals who have been trained and is thus thoroughly acquainted with the
knowledge related to these operations.
• The qualified installer who is allowed to do the electrical work involved in installation, relocation and removal
has the qualifications pertaining to this electrical work as stipulated by the local laws and regulations, and he
or she is a person who has been trained in matters relating to electrical work on the Air to Water Heat Pump
made by Toshiba Carrier Air-conditioning Europe Sp. z o.o. or, alternatively, he or she has been instructed
in such matters by an individual or individuals who have been trained and is thus thoroughly acquainted with
the knowledge related to this work.
• The qualified installer who is allowed to do the refrigerant handling and piping work involved in installation,
relocation and removal has the qualifications pertaining to this refrigerant handling and piping work as
stipulated by the local laws and regulations, and he or she is a person who has been trained in matters
relating to refrigerant handling and piping work on the Air to Water Heat Pump made by Toshiba Carrier Air-
conditioning Europe Sp. z o.o. or, alternatively, he or she has been instructed in such matters by an individual
or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to this
work.
• The qualified installer who is allowed to work at heights has been trained in matters relating to working at
heights with the Air to Water Heat Pump made by Toshiba Carrier Air-conditioning Europe Sp. z o.o. or,
alternatively, he or she has been instructed in such matters by an individual or individuals who have been
trained and is thus thoroughly acquainted with the knowledge related to this work.
Qualified service
person (*1)
• The qualified service person is a person who installs, repairs, maintains, relocates and removes the Air to
Water Heat Pump made by Toshiba Carrier Air-conditioning Europe Sp. z o.o.. He or she has been trained
to install, repair, maintain, relocate and remove the Air to Water Heat Pump made by Toshiba Carrier Air-
conditioning Europe Sp. z o.o. or, alternatively, he or she has been instructed in such operations by an
individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related
to these operations.
• The qualified service person who is allowed to do the electrical work involved in installation, repair, relocation
and removal has the qualifications pertaining to this electrical work as stipulated by the local laws and
regulations, and he or she is a person who has been trained in matters relating to electrical work on the Air
to Water Heat Pump made by Toshiba Carrier Air-conditioning Europe Sp. z o.o. or, alternatively, he or she
has been instructed in such matters by an individual or individuals who have been trained and is thus
thoroughly acquainted with the knowledge related to this work.
• The qualified service person who is allowed to do the refrigerant handling and piping work involved in
installation, repair, relocation and removal has the qualifications pertaining to this refrigerant handling and
piping work as stipulated by the local laws and regulations, and he or she is a person who has been trained
in matters relating to refrigerant handling and piping work on the Air to Water Heat Pump made by Toshiba
Carrier Air-conditioning Europe Sp. z o.o. or, alternatively, he or she has been instructed in such matters by
an individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge
related to this work.
• The qualified service person who is allowed to work at heights has been trained in matters relating to working
at heights with the Air to Water Heat Pump made by Toshiba Carrier Air-conditioning Europe Sp. z o.o. or,
alternatively, he or she has been instructed in such matters by an individual or individuals who have been
trained and is thus thoroughly acquainted with the knowledge related to this work.

4
Definition of protective gear
When the Air to Water Heat Pump is to be transported, installed, maintained, repaired or removed, wear protective
gloves and “safety” work clothing.
In addition to such normal protective gear, wear the protective gear described below when undertaking the special
work detailed in the table below.
Failure to wear the proper protective gear is dangerous because you will be more susceptible to injury, burns,
electric shocks and other injuries.
Work undertaken Protective gear worn
All types of work Protective gloves
“Safety” working clothing
Electrical-related work Gloves to provide protection for electricians and from heat
Insulating shoes
Clothing to provide protection from electric shock
Work done at heights (50 cm or
more)
Helmets for use in industry
Transportation of heavy objects Shoes with additional protective toe cap
Repair of Outdoor Unit Gloves to provide protection for electricians and from heat

5
The unit and this service guide list very important safety precautions.
Understand the following details (indications and symbols) before reading the body text, and follow the instructions.
The important contents concerned to the safety are described on the product itself and on this Service Manual.
Please read this Service Manual after understanding the described items thoroughly in the following contents
(Indications / Illustrated marks), and keep them.
[Explanation of indications]
* Property damage: Enlarged damage concerned to property, furniture, and domestic animal/pet.
[Explanation of illustrated marks]
Indication Explanation
DANGER Indicates contents assumed that an imminent danger causing a death or serious injury of
the repair engineers and the third parties when an incorrect work has been executed.
WARNING Indicates possibilities assumed that a danger causing a death or serious injury of the
repair engineers, the third parties, and the users due to troubles of the product after work
when an incorrect work has been executed.
CAUTION Indicates contents assumed that an injury or property damage (*) may be caused on the
repair engineers, the third parties, and the users due to troubles of the product after work
when an incorrect work has been executed.
Mark Explanation
Indicates prohibited items (Forbidden items to do)
The sentences near an illustrated mark describe the concrete prohibited contents.
Indicates mandatory items (Compulsory items to do)
The sentences near an illustrated mark describe the concrete mandatory contents.
Indicates cautions (Including danger / warning)
The sentences or illustration near or in an illustrated mark describe the concrete cautious
contents.

6
Warning indications on the Air to Water Heat Pump
[Confirmation of warning label on the main unit]
Confirm that labels are indicated on the specified positions
If removing the label during parts replace, stick it as the original.
WARNING
(Risk of fire)
This mark is for R32 refrigerant only. Refrigerant type is written on nameplate of
Outdoor Unit.
In case that refrigerant type is R32, this unit uses a flammable refrigerant.
If refrigerant leaks and comes in contact with fire or heating part, it will create
harmful gas and there is risk of fire.
Read the OWNER’S MANUAL carefully before operation.
Service personnel are required to carefully read the OWNER’S MANUAL and INSTALLATION MANUAL
before operation.
Further information is available in the OWNER’S MANUAL, INSTALLATION MANUAL, and the like.
Warning indication Description
WARNING
ELECTRICAL SHOCK HAZARD
Disconnect all remote electric power supplies before
servicing.
WARNING
Moving parts.
Do not operate unit with grille removed.
Stop the unit before the servicing.
CAUTION
High temperature parts.
You might get burned when removing this panel.
CAUTION
Do not touch the aluminum fins of the unit.
Doing so may result in injury.
CAUTION
BURST HAZARD
Open the service valves before the operation, otherwise
there might be the burst.
WARNING
ELECTRICAL SHOCK HAZARD
Disconnect all remote electric
power supplies before servicing.
WARNING
Moving parts.
Do not operate unit with grille removed.
Stop the unit before the servicing.
CAUTION
High temperature parts.
You might get burned when removing
this panel.
CAUTION
Do not touch the aluminum fins of the unit.
Doing so may result in injury.
CAUTION
BURST HAZARD
Open the service valves before the
operation, otherwise there might be the
burst.

7
Precaution for safety
The appliance shall be installed in accordance with national wiring regulations. Capacity shortages of the power
circuit or an incomplete installation may cause an electric shock or fire.
DANGER
Turn off breaker
Before carrying out the installation, maintenance, repair or removal work, be sure to set the circuit breaker to the
OFF position. Otherwise, electric shocks may result.
Before opening the intake grille of the indoor unit or service panel of the outdoor unit, set the circuit breaker to the
OFF position.
Failure to set the circuit breaker to the OFF position may result in electric shocks through contact with the interior
parts.
Only a qualified installer (*1) or qualified service person (*1) is allowed to remove the intake grille of the indoor
unit or service panel of the outdoor unit and do the work required.
Before starting to repair the outdoor unit fan or fan guard, be absolutely sure to set the circuit breaker to the OFF
position, and place a “Work in progress” sign on the circuit breaker.
When cleaning the filter or other parts of the indoor unit, set the circuit breaker to OFF without fail, and place a
“Work in progress” sign near the circuit breaker before proceeding with the work.
Prohibition
Do not turn ON the circuit breaker under the condition of removing a cabinet, a panel, etc.
Otherwise, it leads to an electric shock with a high voltage, resulting in loss of life.
(*1) Refer to the “Definition of qualified installer or qualified service person”.

8
WARNING
General
Before starting to repair the Air to Water Heat Pump, read carefully through the Service Manual, and repair the
Air to Water Heat Pump by following its instructions.
Only qualified service person (*1) is allowed to repair the Air to Water Heat Pump.
Repair of the Air to Water Heat Pump by unqualified person may give rise to a fire, electric shocks, injury, water
leaks and/or other problems.
Only a qualified installer (*1) or qualified service person (*1) is allowed to carry out the electrical work of the Air
to Water Heat Pump.
Under no circumstances must this work be done by an unqualified individual since failure to carry out the work
properly may result in electric shocks and/or electrical leaks.
Wear protective gloves and safety work clothing during installation, servicing and removal.
When connecting the electrical wires, repairing the electrical parts or undertaking other electrical jobs, wear
gloves to provide protection for electricians, insulating shoes and clothing to provide protection from electric
shocks.
Failure to wear this protective gear may result in electric shocks.
Use wiring that meets the specifications in the Installation Manual and the stipulations in the local regulations and
laws.
Use of wiring which does not meet the specifications may give rise to electric shocks, electrical leakage, smoking
and/or a fire.
Only a qualified installer (*1) or qualified service person (*1) is allowed to undertake work at heights using a stand
of 50 cm or more.
When working at heights, use a ladder which complies with the ISO 14122 standard, and follow the procedure in
the ladder’s instructions.
Also wear a helmet for use in industry as protective gear to undertake the work.
When working at heights, put a sign in place so that no-one will approach the work location, before proceeding
with the work.
Parts and other objects may fall from above, possibly injuring a person below.
Do not touch the aluminum fin of the outdoor unit.
You may injure yourself if you do so. If the fin must be touched for some reason, first put on protective gloves and
safety work clothing, and then proceed.
Do not climb onto or place objects on top of the outdoor unit.
You may fall or the objects may fall of the outdoor unit and result in injury.
When transporting the Air to Water Heat Pump, wear shoes with additional protective toecap.
When transporting the Air to Water Heat Pump, do not hold the bands around the packing carton.
You may injure yourself if the bands should break.
This Air to Water Heat Pump has passed the pressure test as specified in IEC 60335-2-40 Annex EE.
Electric shock
hazard
When you access inside of the electric cover to repair electric parts, wait for about five minutes after turning off
the breaker.
Do not start repairing immediately.
If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is
satisfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to continue operation, an
adequate temporary solution shall be used. This shall be reported to the owner of the equipment so all parties are
advised.
Initial safety checks shall include:
- that capacitors are discharged;
Touching the terminals of charged high-voltage capacitors may cause electric shock.
Natural discharge of the capacitor takes about five minutes.
- that no live electrical components and wiring are exposed while charging, recovering or purging the system;
- that there is continuity of earth bonding;
Prohibition
Place a “Work in progress” sign near the circuit breaker while the installation, maintenance, repair or removal work
is being carried out.
There is a danger of electric shocks if the circuit breaker is set to ON by mistake.
When checking the electric parts, removing the cover of the electric parts box of Indoor Unit and/or front panel of
Outdoor Unit inevitably to determine the failure, put a sign “Do not enter” around the site before the work. Failure
to do this may result in third person getting electric shock.
Before operating the Air to Water Heat Pump after having completed the work, check that the electrical parts box
cover of the indoor unit and service panel of the outdoor unit are closed, and set the circuit breaker to the ON
position. You may receive an electric shock if the power is turned on without first conducting these checks.
(*1) Refer to the “Definition of qualified installer or qualified service person”.

9
Stay on protection
If, in the course of carrying out repairs, it becomes absolutely necessary to check out the electrical parts with the
electrical parts box cover of one or more of the indoor units and the service panel of the outdoor unit removed in
order to find out exactly where the trouble lies, wear insulated heat-resistant gloves, insulated boots and insulated
work overalls, and take care to avoid touching any live parts.
You may receive an electric shock if you fail to heed this warning. Only qualified service person (*1) is allowed to
do this kind of work.
Check earth wires
Before troubleshooting or repair work, check the earth wire is connected to the earth terminals of the main unit,
otherwise an electric shock is caused when a leak occurs. If the earth wire is not correctly connected, contact an
electric engineer for rework.
After completing the repair or relocation work, check that the earth wires are connected properly.
Be sure to connect earth wire. (Grounding work) Incomplete earthing causes an electric shock.
Do not connect earth wires to gas pipes, water pipes, and lightning rods or earth wires for telephone wires.
Prohibition of
modification
Do not modify the products. Do not also disassemble or modify the parts.
It may cause a fire, electric shock or injury.
Use specified
parts
When any of the electrical parts are to be replaced, ensure that the replacement parts satisfy the specifications
given in the Service Manual (or use the parts contained on the parts list in the Service Manual).
Use of any parts which do not satisfy the required specifications may give rise to electric shocks, smoking and/or
a fire.
Replace components only with parts specified by the manufacturer. Other parts may result in the ignition of
refrigerant in the atmosphere due to the refrigerant leak.
Do not bring a
child close to the
equipment
If, in the course of carrying out repairs, it becomes absolutely necessary to check out the electrical parts with the
electrical parts box cover of one or more of the indoor units and the service panel of the outdoor unit removed in
order to find out exactly where the trouble lies, place "Keep out" signs around the work site before proceeding.
Third-party individuals may enter the work site and receive electric shocks if this warning is not heeded.
Insulating
measures
Connect the cut-off lead wires with crimp contact, etc, put the closed end side upward and then apply a water-cut
method, otherwise a leak or production of fire is caused at the users’ side.
No fire
When performing repairs using a gas burner, replace the refrigerant with nitrogen gas because the oil that coats
the pipes may otherwise burn.
When repairing the refrigerating cycle, take the following measures.
1)Be attentive to fire around the cycle.
When using a gas stove, etc, be sure to put out fire before work; otherwise the oil mixed with refrigerant gas
may catch fire.
2)Do not use a brazing in the closed room.
When using it without ventilation, carbon monoxide poisoning may be caused.
3)Do not bring inflammables close to the refrigerant cycle, otherwise fire of the brazing may catch the
inflammables.
(*1) Refer to the “Definition of qualified installer or qualified service person”.
WARNING

10
Refrigerant
The refrigerant used by this Air to Water Heat Pump is the R32.
Check the used refrigerant name and use tools and materials of the parts which match with it.
For the products which use R32 refrigerant, the refrigerant name is indicated at a position on the outdoor unit
where is easy to see.
To prevent miss charging, the route of the service port is changed from one of the former R22.
Be careful for miss charging since a charging port of R32 is the same diameter as that of R410A.
Do not use any refrigerant different from the one specified for complement or replacement.
Otherwise, abnormally high pressure may be generated in the refrigeration cycle, which may result in a failure or
explosion of the product or an injury to your body.
For an Air to Water Heat Pump which uses R32, never use other refrigerant than R32.
For an Air to Water Heat Pump which uses other refrigerant (R22, R410A etc.), never use R32.
If different types of refrigerant are mixed, abnormal high pressure generates in the refrigerating cycle and an injury
due to breakage may be caused.
If the different type of refrigerants are mixed in, be sure to recharge the refrigerant.
Do not charge refrigerant additionally.
If charging refrigerant additionally when refrigerant gas leaks, the refrigerant composition in the refrigerating cycle
changes resulted in change of Air to Water Heat Pump characteristics or refrigerant over the specified standard
amount is charged and an abnormal high pressure is applied to the inside of the refrigerating cycle resulted in
cause of breakage or injury.
Therefore if the refrigerant gas leaks, recover the refrigerant in the Air to Water Heat Pump, execute vacuuming,
and then newly recharge the specified amount of liquid refrigerant.
In this time, never charge the refrigerant over the specified amount.
When recharging the refrigerant in the refrigerating cycle, do not mix the refrigerant or air other than R32 into the
specified refrigerant.
If air or others is mixed with the refrigerant, abnormal high pressure generates in the refrigerating cycle resulted
in cause of injury due to breakage.
After the installation work, confirm that refrigerant gas does not leak. If refrigerant gas leaks into the room and
flows near a fire source, such as a cooking range, it may generate noxious gases, causing a fire.
Never recover the refrigerant into the outdoor unit.
When the equipment is moved or repaired, be sure to recover the refrigerant with recovering device.
The refrigerant cannot be recovered in the outdoor unit; otherwise a serious accident such as breakage or injury
is caused.
Assembly /
Cabling
After repair work, surely assemble the disassembled parts, and connect and lead the removed wires as before.
Perform the work so that the cabinet or panel does not catch the inner wires.
If incorrect assembly or incorrect wire connection was done, a disaster such as a leak or fire is caused at user’s
side.
Insulator check
After the work has finished, be sure to use an insulation tester set (500 VMΩ) to check the resistance is 1 MΩor
more between the charge section and the non-charge metal section (Earth position).
If the resistance value is low, a disaster such as a leak or electric shock is caused at user’s side.
Ventilation
When the refrigerant gas leaks during work, execute ventilation.
If the refrigerant gas touches to a fire, it may generate noxious gases, causing a fire.
A case of leakage of the refrigerant and the closed room full with gas is dangerous because a shortage of oxygen
occurs. Be sure to execute ventilation.
If refrigerant gas has leaked during the installation work, ventilate the room immediately.
If the leaked refrigerant gas comes in contact with fire, it may generate noxious gases, causing a fire.
WARNING

11
Compulsion
When the refrigerant gas leaks, find out the leaked position and repair it surely.
If the leaked position cannot be found out and the repair work is interrupted, pump-down and tighten the service
valve, otherwise the refrigerant gas may leak into the room.
When gas touches to fire such as fan heater, stove or cocking stove, it may generate noxious gases, causing a
fire though the refrigerant gas itself is innocuous.
When installing equipment which includes a large amount of charged refrigerant in a sub-room, it is necessary
that the concentration does not the limit even if the refrigerant leaks.
If the refrigerant leaks and exceeds the limit concentration, an accident of shortage of oxygen is caused.
Tighten the flare nut with a torque wrench in the specified manner.
Excessive tighten of the flare nut may cause a crack in the flare nut after a long period, which may result in
refrigerant leakage.
Nitrogen gas must be used for the airtight test.
The charge hose must be connected in such a way that it is not slack.
For the installation/moving/reinstallation work, follow to the Installation Manual.
If an incorrect installation is done, a trouble of the refrigerating cycle, water leak, electric shock or fire is caused.
Install the outdoor unit properly in a location that is durable enough to support the weight of the outdoor unit.
Insufficient durability may cause the outdoor unit to fall, which may result in injury.
Check after repair
Once the repair work has been completed, check for refrigerant leaks, and check the insulation resistance and
water drainage.
Then perform a trial run to check that the Air to Water Heat Pump is running properly.
After repair work has finished, check there is no trouble. If check is not executed, a fire, electric shock or injury
may be caused. For a check, turn off the power breaker.
After repair work (installation of front panel and cabinet) has finished, execute a test run to check there is no
generation of smoke or abnormal sound.
If check is not executed, a fire or an electric shock is caused. Before test run, install the front panel and cabinet.
Do not operate
the unit with the
valve closed
Check the following matters before a test run after repairing piping.
• Connect the pipes surely and there is no leak of refrigerant.
• The valve is opened.
Running the compressor under condition that the valve closes causes an abnormal high pressure resulted in
damage of the parts of the compressor and etc. and moreover if there is leak of refrigerant at connecting section
of pipes, the air is suctioned and causes further abnormal high pressure resulted in burst or injury.
Check after
reinstallation
Only a qualified installer (*1) or qualified service person (*1) is allowed to relocate the Air to Water Heat Pump. It
is dangerous for the Air to Water Heat Pump to be relocated by an unqualified individual since a fire, electric
shocks, injury, water leakage, noise and/or vibration may result.
Check the following items after reinstallation.
1) The earth wire is correctly connected.
2) The power cord is not caught in the product.
3) There is no inclination or unsteadiness and the installation is stable.
If check is not executed, a fire, an electric shock or an injury is caused.
Cooling check
When the service panel of the outdoor unit is to be opened in order for the compressor or the area around this
part to be repaired immediately after the Air to Water Heat Pump has been shut down, set the circuit breaker to
the OFF position, and then wait at least 10 minutes before opening the service panel.
If you fail to heed this warning, you will run the risk of burning yourself because the compressor pipes and other
parts will be very hot to the touch. In addition, before proceeding with the repair work, wear the kind of insulated
heat-resistant gloves designed to protect electricians.
When the service panel of the outdoor unit is to be opened in order for the fan motor, reactor, inverter or the areas
around these parts to be repaired immediately after the Air to Water Heat Pump has been shut down, set the
circuit breaker to the OFF position, and then wait at least 10 minutes before opening the service panel.
If you fail to heed this warning, you will run the risk of burning yourself because the fan motor, reactor, inverter
heat sink and other parts will be very hot to the touch.
In addition, before proceeding with the repair work, wear the kind of insulated heat-resistant gloves designed to
protect electricians.
(*1) Refer to the “Definition of qualified installer or qualified service person”.
WARNING

12
Installation
Only a qualified installer (*1) or qualified service person (*1) is allowed to install the Air to Water Heat Pump. If
the Air to Water Heat Pump is installed by an unqualified individual, a fire, electric shocks, injury, water leakage,
noise and/or vibration may result.
Before starting to install the Air to Water Heat Pump, read carefully through the Installation Manual, and follow its
instructions to install the Air to Water Heat Pump.
Do not install the Air to Water Heat Pump in a location that may be subject to a risk of expire to a combustible gas.
If a combustible gas leaks and becomes concentrated around the unit, a fire may occur.
When transporting the Air to Water Heat Pump, use a forklift truck and when moving the Air to Water Heat Pump
by hand, move the unit with 4 people.
Install a circuit breaker that meets the specifications in the Installation Manual and the stipulations in the local
regulations and laws.
Install the circuit breaker where it can be easily accessed by the agent.
Do not place any combustion appliance in a place where it is directly exposed to the wind of Air to Water Heat
Pump, otherwise it may cause imperfect combustion.
Compulsion
When carrying out the pump-down work shut down the compressor before disconnecting the refrigerant pipe.
Disconnecting the refrigerant pipe with the service valve left open and the compressor still operating will cause
air, etc. to be sucked in, raising the pressure inside the refrigeration cycle to an abnormally high level, and possibly
resulting in rupture, injury, etc.
When removing the brazing parts of suction and discharge pipe for the compressor, remove them at the place
ventilated well after recovering the refrigerant. Improper recovering may cause the spurt of the refrigerant and the
refrigeration oil, causing an injury.
Prohibition
Do not vent gases to the atmosphere.
Venting gases to the atmosphere is prohibited by the law.
(*1) Refer to the “Definition of qualified installer or qualified service person”.
CAUTION
Wearing of gloves
Ensure wearing of gloves when performing any work in order to avoid injury from parts, etc.
Failure to wear the proper protective gloves cause an injury due to the parts, etc.
Confirm
When performing the brazing work, check whether refrigerant leaks or remains.
If the leakage refrigerant gas touches a fire source, it may generate noxious gases, causing a fire.
WARNING

13
Explanations given to user
• If you have discovered that the fan grille is damaged, do not approach the outdoor unit but set the circuit breaker
to the OFF position, and contact a qualified service person to have the repairs done.
Do not set the circuit breaker to the ON position until the repairs are completed.
Relocation
• Only a qualified installer (*1) or qualified service person (*1) is allowed to relocate the Air to Water Heat Pump.
It is dangerous for the Air to Water Heat Pump to be relocated by an unqualified individual since a fire, electric
shocks, injury, water leakage, noise and/or vibration may result.
• When carrying out the pump-down work shut down the compressor before disconnecting the refrigerant pipe.
Disconnecting the refrigerant pipe with the service valve left open and the compressor still operating will cause
air, etc. to be sucked in, raising the pressure inside the refrigeration cycle to an abnormally high level, and
possibly resulting in rupture, injury, etc.
(*1) Refer to the “Definition of qualified installer or qualified service person”.
Note: This Air to Water Heat Pump is for residential use.

14
Refrigerant R32
This Air to Water Heat Pump adopts a new HFC type refrigerant (R32) which does not deplete the ozone layer.
(1) Safety caution concerned to refrigerant R32
Be sure that water, dust, the former refrigerant or the former refrigerating oil is not mixed into the refrigerating cycle
of the Air to Water Heat Pump with refrigerant R32 during installation work or service work.
If an incorrect work or incorrect service is performed, there is a possibility to cause a serious accident.
Use the tools and materials exclusive to R32 to purpose a safe work.
(2) Safety and cautions on installation / service
<Safety items>
When gas concentration and ignition energy are happened at the same time, R32 has a slight possibility of burning.
Although it will not ignite under normal work environment conditions, be aware that the flame spreads if ignition
should occur.
It is necessary to carry out installation/servicing safely while taking the following precautions into consideration.
(1) Never use refrigerant other than specified refrigerant (R32) in an Air to Water Heat Pump which is designed
to operate with the specified refrigerant (R32).
If other refrigerant than R32 is used, it may cause personal injury, etc. by a malfunction, a fire, a rupture.
(2) Since R32 is heavier than air, it tends to accumulate at the bottom (near the floor).
Ventilate properly for the working environment to prevent its combustion.
Especially in a basement or a closed room where is the high risk of the accumulation, ventilate the room with
a local exhaust ventilation.
If refrigerant leakage is confirmed in the room or the place where the ventilation is insufficient, do not work until
the proper ventilation is performed and the work environment is improved.
(3) When performing brazing work, be sure to check for leakage refrigerant or residual refrigerant.
If the leakage refrigerant comes into contact with fire, a poisonous gas may occur or it may cause a fire.
Keep adequate ventilation during the work.
(4) When refrigerant gas leaks during work, execute ventilation. If the leakage refrigerant comes into contact with
a fire, a poisonous gas may occur or it may cause a fire.
(5) No person carrying out work in relation to a refrigerating system which involves exposing any pipe work shall
use any sources of ignition in such a manner that it may lead to the risk of fire or explosion.
All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of
installation, repairing, removing and disposal, during which refrigerant can possibly be released to the
surrounding space.
Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no
flammable hazards or ignition risks. “No Smoking” signs shall be displayed.
(6) When installing or removing an Air to Water Heat Pump, do not mix air in the refrigerant cycle.
If air or others is mixed with the refrigerant, abnormal high pressure generates in the refrigerating cycle,
causing injury due to the breakage.
(7) After installation work complete, confirm that refrigerant gas is not leaking on the flare connection part or
others. If leaked refrigerant comes to contact with a fire, toxic gas may occur, causing a fire.
(8) Perform the installation work and re-installation according to the installation manual.
Pay attention especially to the area of application. Improper installation may cause refrigeration trouble, water
leakage, electric shock, or fire etc.
(9) Unauthorized modifications to the Air to Water Heat Pump may be dangerous. If a breakdown occurs please
call a qualified Air to Water Heat Pump technician or electrician.
Improper repair may result in water leakage, electric shock and fire, etc.
(10) Carry out the airtight test with nitrogen at a specified pressure. Do not use oxygen or acetylene gas absolutely
as it may cause an explosion.
(11) Always carry a refrigerant leakage detection sensor during the work and work while checking that no
refrigerant leaks around working environment.
(12) If the leakage refrigerant comes into contact with fire, it may cause a fire.
Have a dry powder or CO2fire extinguisher adjacent to the charging area.

15
(13) During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being
worked upon prior to any removal of sealed covers, etc. If it is absolutely necessary to have an electrical supply
to equipment during servicing, then a permanently operating form of leak detection shall be located at the most
critical point to warn of a potentially hazardous situation.
Particular attention shall be paid to the following to ensure that by working on electrical components, the casing
is not altered in such a way that the level of protection is affected. This shall include damage to cables,
excessive number of connections, terminals not made to original specification, damage to seals, incorrect
fitting of glands, etc.
Ensure that seals or sealing materials have not degraded to the point that they no longer serve the purpose of
preventing the ingress of flammable atmospheres. Replacement parts shall be in accordance with the
manufacturer's specifications.
(14) Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not
exceed the permissible voltage and current permitted for the equipment in use.
Intrinsically safe components are the only types that can be worked on while live in the presence of a
flammable atmosphere. The test apparatus shall be at the correct rating. Replace components only with parts
specified by the manufacturer.
Other parts may result in the ignition of refrigerant in the atmosphere from a leak.
<Caution items>
(1) The opposite side dimension of the Air to Water Heat Pump’s flared nut using R32 and the shape of the charge
port are the same as those of R410A.
(2) Be careful not to charge refrigerant by mistake. Should the different type of refrigerant mix in, be sure to
recharge the refrigerant.
(3) Do not mix the other refrigerant or refrigerating oil with the refrigerant.
(4) Since the pressure of R32 is 1.6 times higher than that of the former refrigerant (R22), use tools and parts with
high pressure resistance specification similar to R410A.
(5) In the installation time, use clean pipe materials and work with great attention so that water and others do not
mix in because pipes are affected by impurities such as water, oxide film, oil, etc. Use the clean pipes. Be sure
to braze while flowing nitrogen gas in the pipe. (Never use gas other than nitrogen gas.)
(6) For the earth protection, use a vacuum pump for air purge.
(7) R32 refrigerant is Single-component refrigerant that does not change its composition.
Although it is possible to charge the refrigerant with either liquid or gas, charge it with liquid.

16
(3) Pipe materials
For the refrigerant pipes, copper pipe and joints are mainly used.
It is necessary to select the most appropriate pipes to conform to the standard.
Use clean pipes or joints to which little impurities adhere.
(1) Copper pipe
Be sure to select the pipes with copper thickness in the table below since the pressure of an Air to Water Heat
Pump using R32 is higher than that of R22.
(2) Joint
The flare joint and socket joint are used for joints of the copper pipe.
The joints are rarely used for installation of the Air to Water Heat Pump.
However clear impurities when using them.
<Piping>
The pipe thickness, flare-finishing size, flare nut and others differ according to a refrigerant type.
When using a long copper pipe for R32, it is recommended to select “Copper or copper-base pipe without seam”
and one with bonded oil amount 40 mg / 10 m or less.
Also do not use crushed, deformed, discolored (especially inside) pipes.
(Impurities cause clogging of expansion valves and capillary tubes.)
<Flare nut>
Use the flare nuts which are attached to the Air to Water Heat Pump unit.
Nominal diameter Outer diameter (mm) Thickness (mm)
R410A or R32
Make sure not to use a thin copper pipe
such as 0.7 mm copper thickness in the
market.
1/4 6.4 0.80
1/2 12.7 0.80
5/8 15.9 1.00

17
(4) Tools
: R410A tools available, : Partly unavailable, : R410A tools unavailable
Note 1 When flaring is carried out for R410A or R32 using the conventional flare tools, adjustment of projection
margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.
Note 2 When saturation temperature is described, the gauge manifold differs for R410A and R32.
If saturation temperature reading is required, special tools exclusive for R32 are required.
Note 3 Since R32 has a slight possibility of burning, be sure to use the tools corresponding to R32.
Note 4 Like R410, a Vacuum pump adapter needs installing to prevent a Vacuum pump oil (mineral oil) from
flowing backward into the Charge hose. Mixing of the Vacuum pump oil into R32 refrigerant may cause a
trouble such as generation of sludge, clogging of capillary, etc.
Note 5 Be sure to use those tools after confirming they correspond to each refrigerant.
Note 6 For a refrigerant cylinder exclusive for R32, the paint color (or label color) of the cylinder is set to the
specified color (light blue) together with the indication of the refrigerant name.
Note 7 Although the container specification is the same as R410A, use a recovering container exclusive for R32
to avoid mixing with other refrigerants.
Note 8 Be careful for miss charging of the refrigerant during work. Miss-charging of the refrigerant type may cause
not only damage of the equipment but also a fire etc.
▼General tools
No.
Installation / service tools Use Applicability to R32 Air to
Water Heat Pump or not
Applicability to R22 Air to
Water Heat Pump or not
Tools / Equipment specification
1 Flare tool Clutch type Pipe flaring
2Copper pipe gauge for
adjusting projection margin ―
Flaring by
conventional flare
tool
―
3 Torque wrench ―Tightening of flare
nut
4 Gauge manifold
Port size
1/2”-20UNF
(5/16” Flare)
Evacuating,
refrigerant charge,
run check, etc.
Note 2
5 Charge hose High-voltage
6 Vacuum pump ―Vacuum drying Note 3
1/2”-20UNF (5/16” Flare)
Connection diameter
1/4”
7 Vacuum pump adapter ―Vacuum drying Note 4
1/2”-20UNF (5/16” Flare)
Connection diameter
1/4”
8Electronic balance for
refrigerant charging
For 10 kg or
20 kg cylinder Refrigerant charge
9 Leakage detector ―Gas leakage check Note 5 Note 5
10 Refrigerant cylinder ―Refrigerant charge Note 6
11 Refrigerant recovery cylinder Exclusive for
R32
Refrigerant
recovery container Note 7
12 Refrigerant recovery device ―Refrigerant
recovery device Note 8 Connection diameter
1/4”
In addition to the above exclusive tools, the following equipments is necessary as the general tools.
1) Pipe cutter 6) Spanner or Adjustable wrench
2) Reamer 7) Hole core drill
3) Pipe bender 8) Tape measure
4) Level vial 9) Metal saw
5) Screwdriver (+, –)
Also prepare the following equipment for other installation method and run check.
1) Clamp meter 3) Insulation resistance tester (Megger)
2) Thermometer 4) Electroscope

18
1Specifications
*1 Heating performance measurement conditions: outside air temperature 7°C, water supply temperature 30°C, outlet water temperature 35°C, refrigerant piping length 7.5 m (no height
difference).
*2 Cooling performance measurement conditions: outside air temperature 35°C, water supply temperature 12°C, outlet water temperature 7°C, refrigerant piping length 7.5 m (no height
difference).
*3 • The remote controller should be shipped with the hydro unit.
• Use two 1.5-meter wires to connect the hydro unit with the remote controller.
*4 Check the water piping for leakage under the maximum operating pressure.
*5 Do not leave the hydro unit at 5°C or below.
①Max operation
Heating: outside air temperature 7°C, water supply temperature 47°C, outlet water temperature 55°C.
Cooling: outside air temperature 35°C, water supply temperature 12°C, outlet water temperature 7°C.
Unit name Hydro unit HWT-601XWHM3W-E, HWT-601XWHT6W-E
Outdoor unit HWT-401HW-E HWT-601HW-E
Heating capacity *1 (kW) 4.0 6.0
Cooling capacity *2 (kW) 4.0 5.0
Variable range of compressor frequency 10 - 80 Hz 10 - 100 Hz
Power source 1 phase 50 Hz 220-240 V
Operation mode Heating Cooling Heating Cooling
Electric characteristic *1 *2 Total Current (A) 4.08 5.38 5.78 7.11
Power (kW) 0.77 1.15 1.25 1.52
Power factor (%) 82 93 94 93
Operating noise sound power level ①Hydro unit (dB (A)) 40 40 40 40
Outdoor unit (dB (A)) 65 62 65 62
Coefficient of performance *1 *2 5.20 3.45 4.80 3.30
Hydro unit Outer dimension Height (mm) 720
Width (mm) 450
Depth (mm) 235
Net weight (kg) 27
Color White
Remote controller
Outer dimension *3
Height (mm) 120
Width (mm) 120
Depth (mm) 16
Circulation pump Motor output (W) 60 (MAX)
Flow rate (L/min) 11.6 11.5 17.3 14.3
Type Non-self-suction centrifugal pump
Heat exchanger Plate-type heat exchange
Outdoor unit Outer dimension Height (mm) 630
Width (mm) 800
Depth (mm) 300
Net weight (kg) 42
Color Silky shade
Compressor Motor output (W) 1100
Type Twin rotary type with DC-inverter variable speed control
Model DX150A1T-21F
Fan motor Standard air capacity (m3/min) 33.6 36.4 33.6 36.4
Motor output (W) 43
Refrigerant piping Connection method Flare connection
Hydro unit Liquid Ø6.4
Gas Ø12.7
Outdoor unit Liquid Ø6.4
Gas Ø12.7
Maximum length (m) 30
Maximum chargeless length (m) 20
Maximum height difference (m) ±30
Minimum length (m) 5
Refrigerant Refrigerant name R32
Charge amount (kg) 0.9
Water piping Pipe diameter R1
Maximum length (m) None (Need the flow rate 10 /min or more)
Maximum height difference (m) ±7
Maximum working water pressure (kPa) *4 430
Operating temperature range Hydro unit (°C) *5 (Cooling / Heating / Hot water) 5-32 / 5-32 / 5-32
Outdoor unit (°C) (Cooling / Heating / Hot water) 10-43 / -20-25 / -20-43
Operating humidity range Hydro unit (%) 15-85
Outdoor unit (%) 15-100
Wiring connection Power wiring 3 wires: including earth wire (Outdoor unit)
Connecting line 4 wires: including earth wire

19
*1 Heating performance measurement conditions: outside air temperature 7°C, water supply temperature 30°C, outlet water temperature 35°C, refrigerant piping length 7.5 m (no height
difference).
*2 Cooling performance measurement conditions: outside air temperature 35°C, water supply temperature 12°C, outlet water temperature 7°C, refrigerant piping length 7.5 m (no height
difference).
*3 • The remote controller should be shipped with the hydro unit.
• Use two 1.5-meter wires to connect the hydro unit with the remote controller.
*4 Check the water piping for leakage under the maximum operating pressure.
*5 Do not leave the hydro unit at 5°C or below.
①Max operation
Heating: outside air temperature 7°C, water supply temperature 47°C, outlet water temperature 55°C.
Cooling: outside air temperature 35°C, water supply temperature 12°C, outlet water temperature 7°C.
Unit name Hydro unit HWT-1101XWHM3W-E, HWT-1101XWHT6W-E, HWT-1101XWHT9W-E
Outdoor unit HWT-801H(R)W-E HWT-1101H(R)W-E
Heating capacity *1 (kW) 8.0 11.0
Cooling capacity *2 (kW) 6.0 8.0
Variable range of compressor frequency 10 - 90 Hz 10 - 100 Hz
Power source 1 phase 50 Hz 220-240 V
Operation mode Heating Cooling Heating Cooling
Electric characteristic *1 *2 Total Current (A) 7.05 8.51 10.60 12.82
Power (kW) 1.54 1.88 2.39 2.86
Power factor (%) 95 96 98 97
Operating noise sound power level ①Hydro unit (dB (A)) 40 40 40 40
Outdoor unit (dB (A)) 65 63 65 64
Coefficient of performance *1 *2 5.19 3.20 4.60 2.80
Hydro unit Outer dimension Height (mm) 720
Width (mm) 450
Depth (mm) 235
Net weight (kg) 27
Color White
Remote controller
Outer dimension *3
Height (mm) 120
Width (mm) 120
Depth (mm) 16
Circulation pump Motor output (W) 60 (MAX)
Flow rate (L/min) 23.0 16.7 32.1 22.7
Type Non-self-suction centrifugal pump
Heat exchanger Plate-type heat exchange
Outdoor unit Outer dimension Height (mm) 1050
Width (mm) 1010
Depth (mm) 370
Net weight (kg) 75
Color Silky shade
Compressor Motor output (W) 2000
Type Twin rotary type with DC-inverter variable speed control
Model NX220A1FJ-20N
Fan motor Standard air capacity (m3/min) 52.4 52.4 58.4 52.4
Motor output (W) 60
Refrigerant piping Connection method Flare connection
Hydro unit Liquid Ø6.4
Gas Ø15.9
Outdoor unit Liquid Ø6.4
Gas Ø15.9
Maximum length (m) 30
Maximum chargeless length (m) 8
Maximum height difference (m) ±30
Minimum length (m) 5
Refrigerant Refrigerant name R32
Charge amount (kg) 1.25
Water piping Pipe diameter R1
Maximum length (m) None (Need the flow rate 13 /min or more)
Maximum height difference (m) ±7
Maximum working water pressure (kPa) *4 430
Operating temperature range Hydro unit (°C) *5 (Cooling / Heating / Hot water) 5-32 / 5-32 / 5-32
Outdoor unit (°C) (Cooling / Heating / Hot water) 10-43 / -25-25 / -25-43
Operating humidity range Hydro unit (%) 15-85
Outdoor unit (%) 15-100
Wiring connection Power wiring 3 wires: including earth wire (Outdoor unit)
Connecting line 4 wires: including earth wire