Mitsubishi Electric Fresh Master GUF-50RDH4 User manual

Installation Instructions
1804875HF8602
Fresh Master
Models:
GUF-50RDH4
GUF-50RD4
GUF-100RDH4
GUF-100RD4

Caution:
1. Always use an all pole disconnection for the main switch (breaker) for the power connection.
2. Always use double insulated PVC cable for the transmission lines.
Vorsicht:
1. Verwenden Sie als Hauptschalter immer einen Schalter, der alle Pole der Stromversorgung
trennt.
2. Verwenden Sie für die Übertragungsleitungen ausschließlich doppelt isoliertes PVC-Kabel.
Précaution:
1. Utilisez toujours comme connexion sur le secteur un disjoncteur principal de mise hors tension
de tous les pôles.
2. Utilisez toujours un câble en PVC à double isolation pour les lignes de transmission.
Cautela:
1. Per l’interruttore principale (interruttore di circuito) per il collegamento di alimentazione elettrica,
bisogna usare un’interruttore di disconnessione di tutti i poli.
2. Per le linee di trasmissione, usare solo un cavo in PVC a doppio isolamento.
Cuidado:
1. Utilice siempre una desconexión de todos los polos para el interruptor (disyuntor) principal de
la conexión del suministro eléctrico.
2. Utilice siempre cable de PVC con doble aislamiento para las líneas de transmisión.
Cuidado:
1. Desligue sempre todos os pólos do interruptor (disjuntor) principal para ligação da electricidade.
2. Utilize sempre cabos de PVC de isolamento duplo para as linhas de transmissão.
Voorzichtig:
1. Gebruik voor de hoofdschakelaar van de elektrische voeding (stroomverbreker) altijd een
schakelaar, waarbij alle polen verbroken worden.
2. Gebruik altijd dubbel geïsoleerde PVC-kabel voor de transmissieleidingen.
Προσοχή:
1. ×ñçóéìïðïéåßôå ðÜíôá ìç÷áíéóìü áðïóýíäåóçò üëùí ôùí áêñïäåêôþí ãéá ôïí êýñéï äéáêüðôç
(áóöáëåéïäéáêüðôç) ãéá ôç óýíäåóç ìå ôçí ðáñï÷Þ ñåýìáôïò.
2. ×ñçóéìïðïéåßôå ðÜíôá êáëþäéï PVC ìå äéðëÞ ìüíùóç ãéá ôéò ãñáììÝò ìåôÜäïóçò.
٧๎:
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2. จᎯሣ཯ʙסࡌպ΢ᖖࡧ൘ሢڟPVCྫសĄ

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Model name
Item GUF-50RD(H)4 GUF-100RD(H)4
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MITSUBISHI ELECTRIC EUROPE B.V.
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ENGLISH
1
- Please take the time to read through these instructions
before commencing with the installation work. They will
help to install the Fresh Master properly and safely.
- The separate Operating Instructions are for the user.
Make sure that they are handed over to the customer.
The warranty will not apply to damage resulting
from failure to follow the warnings and precautions
set forth in the
Installation Instructions .
Contents
1. Safety precautions............................................. 1-5
2. Accessories.......................................................... 5
3. Outline drawings................................................... 5
4. Selecting an installation site................................. 6
5. Installing the Fresh Master................................ 6-7
6. Supply pipe and drain pipe work .......................... 8
7. Refrigerant pipe work ...................................... 9-11
8. Electrical wiring .............................................12-16
9. Feature settings............................................. 17-19
10. Check points after installation work.................... 19
11. Test run..........................................................19-20
12. Troubleshooting.................................................. 21
Fresh Master
Models:
GUF-50RDH4, GUF-50RD4
GUF-100RDH4, GUF-100RD4
Installation Instructions (For use by dealer/contractor)
GUF-50RDH4 shown above.
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GUF-100RD4.
English is original. The other languages versions are
translation of the original.
For use with the R410A & R407C
- Do not modify or disassemble.
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- The Fresh Master and remote controller
should not be installed where it is highly hu-
mid, like a bathroom, or other wet place.
- It could cause electric shock or power leakage.
- Connect the product properly to ground.
- Malfunctioning or power leaks can cause elec-
trical shock.
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-Use of incorrect power supply or voltage could
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install the main unit securely.
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Do not
disassemble
Prohibition of use in
bath or shower room
Connect the
grounding wire.
The instructions
given must be
followed.
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implemented safely and securely in accordance with the engineering
standards and the extension wiring rules for electrical equipment.
- Poor connection or improper wiring work could cause electric
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- Install a power supply isolator at the power supply side as
per local electrical regulations. All supply circuits must be
disconnected before obtaining access to the terminal de-
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-
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- Select an adequate place for the opening to introduce
outdoor air, where it will not intake the exhaust fumes like
combustion gas, or others, and there is no risk of blockage.
- 6KRUWDJHRIIUHVKDLUFRXOGSXWWKHURRPLQDVWDWHRIR[\JHQGH¿FLHQF\
- A duct made of steel must be installed with care not to be
connected electrically with metals such as metal , wire ,
stainless steel plate, or others.
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WARNING
The instructions
given must be
followed.
1. Safety precautions

2
ENGLISH
1.1. Installation
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arises. If the unit is going to be operated by another person,
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Warning:
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plied with the product or on the product nameplate. Mitsubi-
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down, malfunction, or accident resulting from the charging of
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- The unit should not be installed by the user. Ask the dealer
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result.
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accessories are installed improperly, water leakage, electric
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- The Installation Manual details the suggested installation
method. Any structural alteration necessary for installation
must comply with local building code requirements.
Before operating the unit, make sure you read all
the “Safety precautions”.
“Safety precautions” lists important points about
safety. Please be sure to follow them.
Symbols used in the text
Warning:
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risk of injury or death to the user.
Caution:
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age to the unit.
Symbols used in the illustrations
: Indicates that important instructions must be followed.
: Indicates a part which must be grounded.
: Beware of electric shock. (This symbol is displayed on the
main unit label.) <Colour: Yellow>
Warning:
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Prohibited
- Do not place a burning appliance in a place
where it is exposed directly to the air from the
Fresh Master.
- It could cause an accident as a result of incom-
plete combustion.
- Do not use at a place where it is exposed to
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fumes.
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FKHPLFDOIDFWRU\ZKHUHKD]DUGRXVJDVHVVXFK
as acidic gases, alkaline gases, organic sol-
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- It could cause malfunction.
- Do not install this product in a place where it
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- UV may damage covering insulation.
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-
Make sure the power supply isolator is turned off on
the power distribution panel when Fresh Master is not
used for a long period of time after the installation.
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as a result of deteriorated insulation.
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washers and correctly rated wire / chain hangers.
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in the product dropping.
- The outside ducts must be tilted at a gradient (1/30
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Fresh Master, and properly insulated.
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-
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operated damper, lamp, monitoring unit, etc.) using
output signals of the Fresh Master, make sure to
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-
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CAUTION
CAUTION
- When using the product where it is exposed to high temperatures
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result in condensation build up in the unit. The product should not be
used under such conditions.
- Outdoor air may enter the Fresh Master owing to the pressure
difference between indoor and outdoor or external winds even
when the product is not operated. It is recommended to install an
Electrically operated damper to block the outdoor air.
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be introduced into the product when its operation is stopped. It is
recommended to install an electrically operated damper.
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insects may intrude into the product.
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depending on the conditions of outdoor air and indoor temperature
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DQGGRQRWXVHWKHSURGXFWLIGHZLQJRUIUHH]LQJLVDQWLFLSDWHG
* ([DPSOHRIGHZLQJFRQGLWLRQ2XWGRRUDLUÛ&RUORZHUGHZSRLQW
WHPSHUDWXUHDWLQVWDOODWLRQSODFHÛ&RUKLJKHU:KHQWKHLQGRRUWHPSHUDWXUH
LVÛ&RUKLJKHUZLWKWKHUHODWLYHKXPLGLW\KLJKHUWKDQRURWKHU
The instructions
given must be
followed.

3
ENGLISH
 1HYHUUHSDLUWKHXQLWRUWUDQVIHULWWRDQRWKHUVLWHE\\RXUVHOI
If repair is performed improperly, water leakage, electric
VKRFNRU¿UHPD\UHVXOW,I\RXQHHGWRKDYHWKHXQLWUHSDLUHG
RUPRYHGFRQVXOW\RXUGHDOHU
1) Outdoor unit
Warning:
 7KHRXWGRRUXQLWPXVWEHLQVWDOOHGRQDVWDEOHOHYHOVXUIDFH
LQDSODFHZKHUHWKHUHLVQRDFFXPXODWLRQRIVQRZOHDYHVRU
rubbish.
- Do not stand on, or place any items on the unit. You may fall
down or the item may fall, causing injury.
Caution:
- The outdoor unit should be installed in a location where air
and noise emitted by the unit will not disturb the neighbours.
2) Fresh Master
Warning:
- The Fresh Master should be securely installed. If the unit is
loosely mounted, it may fall, causing injury.
 ,QVWDOOWKHXQLWRQDULJLGVWUXFWXUHWRSUHYHQWH[FHVVLYHRS-
HUDWLRQVRXQGRUYLEUDWLRQ
3) Remote controller
Warning:
- The Remote controller should be installed in such a way that
children cannot play with it.
4) Drain hose
Caution:
- Make sure that the drain hose is installed so that drainage
can go ahead smoothly. Incorrect installation may result in
water leakage, causing damage to furniture.
5) Refrigerant pipe
Warning:
- Be sure to wrap insulation around the piping. Direct contact
with the bare piping may result in burns or frostbite.
6) Power Supply, fuse or circuit isolator
Warning:
- Make sure that the unit is powered by a dedicated power sup-
ply. Other appliances connected to the same power supply
FRXOGFDXVHDQRYHUORDG
- Make sure that there is a mains power switch.
 %HVXUHWRDGKHUHWRWKHXQLWVYROWDJHDQGIXVHFLUFXLWLVROD-
WRUUDWLQJV1HYHUXVHDFDEOHRUDIXVHZLWKDKLJKHUUDWLQJ
WKDQWKHRQHVSHFL¿HG
7) Grounding
Caution:
 7KHXQLWPXVWEHSURSHUO\JURXQGHG1HYHUFRQQHFWWKH
grounding wire to a gas pipe, water pipe, lightning conduc-
tor or telephone grounding wire. If the unit is not grounded
properly, electric shock may result.
- Check frequently that the ground wire from the outdoor unit
is properly connected to both the unit's ground terminal and
the grounding electrode.
 3UHFDXWLRQVIRUGHYLFHVWKDWXVH
R407C refrigerant
Caution:
- Do not use the existing refrigerant piping.
- The old refrigerant and refrigerator oil in the existing piping con-
tains a large amount of chlorine which may cause the refrigera-
tor oil of the new unit to deteriorate.
- Use refrigerant piping made of C1220 (CU-DHP) phosphorus
GHR[LGL]HGFRSSHUDVVSHFL¿HGLQWKH-,6+³&RSSHUDQG
copper alloy seamless pipes and tubes”. In addition, be sure
that the inner and outer surfaces of the pipes are clean and
IUHHRIKD]DUGRXVVXOSKXUR[LGHVGXVWGLUWVKDYLQJSDU-
ticles, oils, moisture, or any other contaminant.
- Contaminants on the inside of the refrigerant piping may cause
the refrigerant residual oil to deteriorate.
- Store the piping to be used during installation indoors and
NHHSERWKHQGVRIWKHSLSLQJVHDOHGXQWLOMXVWEHIRUHEUD]LQJ
(Store elbows and other joints in a plastic bag.)
,IGXVWGLUWRUZDWHUHQWHUVWKHUHIULJHUDQWF\FOHGHWHULRUDWLRQRI
the oil and compressor trouble may result.
 8VHHVWHURLOHWKHURLORUDON\OEHQ]HQHVPDOODPRXQWVDPH
DVWKHUHIULJHUDWRURLOWRFRDWÀDUHVDQGÀDQJHFRQQHFWLRQV
- The refrigerator oil will degrade if it is mixed with a large
amount of mineral oil.
 8VHOLTXLGUHIULJHUDQWWR¿OOWKHV\VWHP
- ,IJDVUHIULJHUDQWLVXVHGWRVHDOWKHV\VWHPWKHFRPSRVLWLRQRI
the refrigerant in the cylinder will change and performance may
drop.
- Do not use a refrigerant other than R407C.
,IDQRWKHUUHIULJHUDQW5HWFLVXVHGWKHFKORULQHLQWKH
refrigerant may cause the refrigerator oil to deteriorate.
 8VHDYDFXXPSXPSZLWKDUHYHUVHÀRZFKHFNYDOYH
7KHYDFXXPSXPSRLOPD\ÀRZEDFNLQWRWKHUHIULJHUDQWF\FOH
and cause the refrigerator oil to deteriorate.
 'RQRWXVHWKHIROORZLQJWRROVWKDWDUHXVHGZLWKFRQYHQWLRQ-
al refrigerants.
 *DXJHPDQLIROGFKDUJHKRVHJDVOHDNGHWHFWRUUHYHUVHÀRZ
FKHFNYDOYHUHIULJHUDQWFKDUJHEDVHYDFXXPJDXJHUHIULJHU-
DQWUHFRYHU\HTXLSPHQW
- If the conventional refrigerant and refrigerator oil are mixed in
WKH5&WKHUHIULJHUDQWPD\GHWHULRUDWH
- ,IZDWHULVPL[HGLQWKH5&WKHUHIULJHUDWRURLOPD\GHWHULR-
rate.
6LQFH5&GRHVQRWFRQWDLQDQ\FKORULQHJDVOHDNGHWHFWRUV
for conventional refrigerants will not react to it.
- Do not use a charging cylinder.
- Using a charging cylinder may cause the refrigerant to deterio-
rate.
- Be especially careful when managing the tools.
,IGXVWGLUWRUZDWHUJHWVLQWKHUHIULJHUDQWF\FOHWKHUHIULJHUDQW
may deteriorate.
 5HIULJHUDQWOHDNDJHPD\FDXVHVXIIRFDWLRQ3URYLGHYHQWLOD-
WLRQLQDFFRUGDQFHZLWK(1
 3UHFDXWLRQVIRUGHYLFHVWKDWXVH
R410A refrigerant
- Make sure to use new refrigerant piping.
:KHQXVLQJWKHH[LVWLQJSLSLQJZKLFKXVHG5WDNHFDUHRI
the following points.
5HSODFHWKHÀDUHQXWZLWKWKDWLVDWWDFKHGWRWKHSURGXFW)ODUH
VHFWLRQPXVWEH¿QLVKHGZLWKWKHÀDUHSURFHVVLQJ6HH3
- Use of piping with thin wall should be avoided. (See P.10.)
- Use refrigerant piping made of C1220 (CU-DHP) phosphorus
GHR[LGL]HGFRSSHUDVVSHFL¿HGLQWKH-,6+³&RSSHU
and copper alloy seamless pipes and tubes”. The pipes must
KDYHWKHZDOOWKLFNQHVVDVVKRZQLQWKHWDEOHEHORZ,QDG-
dition, be sure that the inner and outer surfaces of the pipes
DUHFOHDQDQGIUHHRIKD]DUGRXVVXOSKXUR[LGHVGXVWGLUW
VKDYLQJSDUWLFOHVRLOVPRLVWXUHRUDQ\RWKHUFRQWDPLQDQW

4
ENGLISH
¡:DOOWKLFNQHVVPP ¡:DOOWKLFNQHVVPP
¡:DOOWKLFNQHVVPP ¡:DOOWKLFNQHVVPP
It is strictly prohibited to use pipes with thin wall not listed in
WKHDERYHWDEOH
,IWKHLQVLGHRISLSHLVFRQWDPLQDWHGLWFRXOGFDXVHGHWHULRUDWLRQ
RIUHIULJHUDWRURLORURWKHUSUREOHPV
- Store the piping to be used during installation indoors and
NHHSERWKHQGVRIWKHSLSLQJVHDOHGXQWLOMXVWEHIRUHEUD]LQJ
(Store elbows and other joints in a plastic bag.)
,IGXVWGLUWRUZDWHUHQWHUVWKHUHIULJHUDQWF\FOHGHWHULRUDWLRQ
of the oil and compressor trouble may result.
 8VHHVWHURLOHWKHURLORUDON\OEHQ]HQHVPDOODPRXQWVDPH
DVWKHUHIULJHUDWRURLOWRFRDWÀDUHVDQGÀDQJHFRQQHFWLRQV
- The refrigerator oil will degrade if it is mixed with a large
amount of mineral oil.
- Do not use a refrigerant other than R410A.
,IDQRWKHUUHIULJHUDQW5HWFLVXVHGWKHFKORULQHLQWKHUHIULJ-
erant may cause the refrigerator oil to deteriorate.
 8VHDYDFXXPSXPSZLWKDUHYHUVHÀRZFKHFNYDOYH
7KHYDFXXPSXPSRLOPD\ÀRZEDFNLQWRWKHUHIULJHUDQWF\FOH
and cause the refrigerator oil to deteriorate.
- For the following tools, use only the tools special to the
refrigerant R410A.
7RROVDVOLVWHGLQWKHIROORZLQJWDEOHDUHUHTXLUHGIRUWKHUHIULJ-
erant R410A.
Tool name (For R410A)
Gauge manifold Flare tool
Charging hose 3URWUXVLRQDGMXVWFRSSHUSLSHJDXJH
Gas leak detector Vacuum pump adaptor
7RUTXHZUHQFK Balance for refrigerant charging
- Be especially careful when managing the tools.
,IGXVWGLUWRUZDWHUJHWVLQWKHUHIULJHUDQWF\FOHWKHUHIULJHUDQW
may deteriorate.
- Do not use a charging cylinder.
-
Using a charging cylinder may cause the refrigerant to deterio-
rate.
 5HIULJHUDQWOHDNDJHPD\FDXVHVXIIRFDWLRQ3URYLGHYHQWLOD-
WLRQLQDFFRUGDQFHZLWK(1
1.4. Before conducting supply pipe
and drain pipe work
[Supply pipe work is not required for GUF-50, 100RD4]
Caution:
 7KHZDWHUTXDOLW\RIWKHSHUPHDEOH¿OPKXPLGL¿HUVVXSSO\
ZDWHUVKRXOGPHHWSXEOLFZDWHUZRUNVVWDQGDUGVDQGKDYHD
hardness less than 100 mg/ . If the supply water does not
PHHWWKHVHVWDQGDUGVXVHDGHLRQL]HU
- The supply pressure must be within the range of 2u104pa to
49u104pa.
- 6XSSO\SUHVVXUHWKDWLVORZHUWKDQWKHVSHFL¿HGUDQJHZLOOFDXVH
WKHZDWHUWRQRWVXSSOLHGWKHSHUPHDEOH¿OPKXPLGLWLHUDQGWKHKX-
PLGL¿HUPD\QRWZRUN6XSSO\SUHVVXUHWKDWH[FHHGVWKHVSHFL¿HG
range may cause damage to the solenoid valve and result in water
leaks.
- Drain pipe gradient must be more than 1/100.
- Drain water will not be properly discharged.
 )RUDUHDVWKDWDUHH[WUHPHO\FROGLQZLQWHUSHUIRUPIUHH]H
SUHYHQWLRQRQWKHVXSSO\SLSHE\ZUDSSLQJDIUHH]HSUHYHQ-
tion heater and thermal insulation.
&ROGWHPSHUDWXUHVPD\IUHH]HZDWHUDQGGDPDJHVXSSO\SLSH
- Install the drain piping according to this installation Manual
to ensure proper drainage. Wrap thermal insulation around
WKHSLSHVWRSUHYHQWFRQGHQVDWLRQ
- Improper drain piping may cause water leakage and damage to
furniture and other possessions.
1.5. Before getting installed
Caution:
- Do not install the unit where combustible gas may leak.
,IWKHJDVOHDNVDQGDFFXPXODWHVDURXQGWKHXQLWDQH[SORVLRQ
may result.
- Do not use the Fresh Master where food, pets, plants, preci-
sion instruments, or artwork are kept.
7KHTXDOLW\RIWKHIRRGHWFPD\GHWHULRUDWH
 'RQRWXVHWKH)UHVK0DVWHULQVSHFLDOHQYLURQPHQWV
2LOVWHDPVXOIXULFVPRNHHWFFDQVLJQL¿FDQWO\UHGXFHWKH
performance of the Fresh Master or damage its parts.
- When installing the unit in a hospital, communication station,
RUVLPLODUSODFHSURYLGHVXI¿FLHQWSURWHFWLRQDJDLQVWQRLVH
- 7KHLQYHUWHUHTXLSPHQWSULYDWHSRZHUJHQHUDWRUKLJKIUHTXHQF\
PHGLFDOHTXLSPHQWRUUDGLRFRPPXQLFDWLRQHTXLSPHQWPD\
FDXVHWKH)UHVK0DVWHUWRRSHUDWHHUURQHRXVO\RUIDLOWRRSHU-
DWH2QWKHRWKHUKDQGWKH)UHVK0DVWHUPD\DIIHFWVXFKHTXLS-
ment by creating noise that disturbs medical treatment or image
broadcasting.
- Do not install the unit on a structure that may cause leakage.
:KHQWKHURRPKXPLGLW\H[FHHGVRUZKHQWKHGUDLQSLSH
LVFORJJHGFRQGHQVDWLRQPD\GULSIURPWKH)UHVK0DVWHU
3HUIRUPFROOHFWLYHGUDLQDJHZRUNWRJHWKHUZLWKWKHRXWGRRUXQLW
DVUHTXLUHG
 %HIRUHJHWWLQJLQVWDOOHGPRYHG
electrical work
Caution:
- Ground the unit.
'RQRWFRQQHFWWKHJURXQGZLUHWRJDVRUZDWHUSLSHVOLJKWQLQJ
URGVRUWHOHSKRQHJURXQGOLQHV,PSURSHUJURXQGLQJPD\UHVXOW
in electric shock.
- Install the power cable so that tension is not applied to the cable.
- Tension may cause the cable to break and generate heat and
FDXVHD¿UH
- Install an leak circuit isolator, as required.
,IDQOHDNFLUFXLWLVRODWRULVQRWLQVWDOOHGHOHFWULFVKRFNPD\
result.
 8VHSRZHUOLQHFDEOHVRIVXI¿FLHQWFXUUHQWFDUU\LQJFDSDFLW\
and rating.
-
&DEOHVWKDWDUHWRRVPDOOPD\OHDNJHQHUDWHKHDWDQGFDXVHD
¿UH
 8VHRQO\DFLUFXLWLVRODWRUDQGIXVHRIWKHVSHFL¿HGFDSDFLW\
- A fuse or circuit isolator of a larger capacity or a steel or copper
ZLUHPD\UHVXOWLQDJHQHUDOXQLWIDLOXUHRU¿UH
- Do not wash the Fresh Master.
- Washing them may cause an electric shock.
-
Be careful that the installation base is not damaged by long
use.
,IWKHGDPDJHLVOHIWXQFRUUHFWHGWKHXQLWPD\IDOODQGFDXVH
SHUVRQDOLQMXU\RUSURSHUW\GDPDJH
 %HYHU\FDUHIXODERXWSURGXFWWUDQVSRUWDWLRQ
- Only one person should not carry the product if it weighs more
than 20 kg.
- Fresh Master use PP bands for packaging. Do not use any PP
bands for a means of transportation. It is dangerous.
'RQRWWRXFKWKHKHDWH[FKDQJHU¿QV'RLQJVRPD\FXW\RXU
¿QJHUV
:KHQWUDQVSRUWLQJWKHRXWGRRUXQLWVXVSHQGLWDWWKHVSHFL¿HG
positions on the unit base. Also support the outdoor unit at four
points so that it cannot slip sideways.
- Safely dispose of the packing materials.
3DFNLQJPDWHULDOVVXFKDVQDLOVDQGRWKHUPHWDORUZRRGHQ
SDUWVPD\FDXVHVWDEVRURWKHULQMXULHV
- Tear apart and throw away plastic packaging bags so that chil-
dren can not play with them. If children play with a plastic bag
ZKLFKZDVQRWWRUQDSDUWWKH\IDFHWKHULVNRIVXIIRFDWLRQ

5
ENGLISH
The unit is provided with the following accessories:
No. Accessories Qty
1Pipe insulation 2
2Flare insulation 2
3Tie band 4
4'XFWFRQQHFWLQJÀDQJHV 4
5Mounting screws 16
3. Outline drawings
2. Accessories
G
P
M
L
20
100
øH
øJ
C
(N)
A
FE
N
D
B
79 79
N
T
150 - 250
60
Q
79
R30
K
Air exhaust fan
Damper plate
Air supply fan
&HLOLQJVXVSHQVLRQ¿[WXUH
(4-13uOHQJWKKROHIRU*8)5'+5'
&HLOLQJVXVSHQVLRQ¿[WXUH (4-15uOHQJWKKROHIRU*8)5'+5'
RA
(Return air)
Control box
Maintenance cover
EA
(Exhaust air)
+LJKHI¿FLHQF\¿OWHU
(Optional part)
Gas pipe
Drain discharge hole
(VP25 connection)
Lossnay core
/LTXLGSLSH
Heat exchanger
$LU¿OWHUV
SA
(Supply air)
OA
(Outdoor air)
&HLOLQJVXVSHQVLRQ¿[WXUH Maintenance cover
Location at which the duct direction can be changed
Lossnay core
$LU¿OWHU
+LJKHI¿FLHQF\¿OWHU
Fan
Maintenance space
Inspection
opening
Inspection
opening
Solenoid valve unit with
pressure regulator*
Solenoid valve
Heat exchange unit
Humidifying element
Maintenance space
Power cable instal-
lation port
&DQLQVWDOOXSSHUDUHDRIFHLOLQJVXVSHQVLRQ¿[WXUH
*8)5'+5'
Location at which the duct direction can be changed
Humidifying element*
S (Water intake)
(Discharge hole)
Water intake strainer
with check valve*
(PT1/2 External thread)
More than 600
*8)5'+RQO\
Unit (mm)
Model
External dimension Ceiling suspension
¿[WXUHSLWFK Duct connection ÀDQJH Duct pitch +XPLGL¿FDWLRQ
Inspection
opening
Weight
(kg)
ABCDEF
Nominal
diameter
GH J K LMNPQRS T
*8)5'+
GUF-50RD4 1288 1016 317 1185 1048 22 200 158.5 192 208 745 372.5 435 124 347 135 99 266 450 57
(54)
*8)5'+
GUF-100RD4 1580 1231 398 1465 1271 16 250 199 242 258 920 460 670 149 361 169 110 280 600 98
(92)
*Values shown in parentheses “( )” are for RD4.
1.7. Before starting the test run
Caution:
- Turn on the power at least 12 hours before starting operation.
- Starting operation immediately after turning on the main power
switch can result in severe damage to internal parts. Keep the
power switch turned on during the operational season.
 'RQRWWRXFKWKHVZLWFKHVZLWKZHW¿QJHUV
7RXFKLQJDVZLWFKZLWKZHW¿QJHUVFDQFDXVHHOHFWUL¿FDWLRQ
- Do not touch the refrigerant pipes during and immediately after operation.
- 'XULQJDQGLPPHGLDWHO\DIWHURSHUDWLRQWKHUHIULJHUDQWSLSHVDUHPD\EH
KRWRUFROGGHSHQGLQJRQWKHFRQGLWLRQRIWKHUHIULJHUDQWÀRZLQJWKURXJK
WKHUHIULJHUDQWSLSLQJFRPSUHVVRUDQGRWKHUUHIULJHUDQWF\FOHSDUWV<RXU
hands may suffer burns or frostbite if you touch the refrigerant pipes.
- Do not operate the Fresh Master and outdoor unit with the
SDQHOVDQGJXDUGVUHPRYHG
5RWDWLQJKRWRUKLJKYROWDJHSDUWVFDQFDXVHLQMXULHV
- Do not turn off the power immediately after stopping operation.
$OZD\VZDLWDWOHDVW¿YHPLQXWHVEHIRUHWXUQLQJRIIWKHSRZHU
2WKHUZLVHZDWHUOHDNDJHDQGWURXEOHPD\RFFXU

6
ENGLISH
4. Selecting an installation site
 6HOHFWDVLWHZLWKVWXUG\¿[HGVXUIDFHVXI¿FLHQWO\GXUDEOHDJDLQVW
the weight of unit.
 %HIRUHLQVWDOOLQJXQLWWKHURXWHWRFDUU\WKHXQLWWRWKHLQVWDOODWLRQ
site should be determined.
- Select a site where the unit is not affected by entering air.
 6HOHFWDVLWHZKHUHWKHÀRZRIVXSSO\UHWXUQH[KDXVWDQGRXWGRRU
air is not blocked.
- Select a site where refrigerant piping and exhaust/outdoor ducts
can easily be led to the outside.
-
Select a site which allows the supply air to be distributed fully in
room.
- Select a location where the inspection opening can be installed.
-
'RQRWLQVWDOOXQLWDWDVLWHZLWKRLOVSODVKLQJRUVWHDPLQODUJHTXDQWL-
ties .
 'RQRWLQVWDOOXQLWDWDVLWHZKHUHFRPEXVWLEOHJDVPD\JHQHUDWH
ÀRZLQVWDJQDWHRUOHDN
-
'RQRWLQVWDOOXQLWDWDVLWHZKHUHHTXLSPHQWJHQHUDWLQJKLJKIUHTXHQ-
F\ZDYHVDKLJKIUHTXHQF\ZDYHZHOGHUIRUH[DPSOHLVSURYLGHG
 'RQRWLQVWDOOXQLWDWDVLWHZKHUH¿UHGHWHFWRULVORFDWHGDWWKH
supply air side. (Fire detector may operate erroneously due to the
heated air supplied during heating operation.)
- When special chemical product may be scatter all around such
DVVLWHFKHPLFDOSODQWVDQGKRVSLWDOVIXOOLQYHVWLJDWLRQLVUHTXLUHG
before installing unit. (The plastic components may be damaged
depending on the chemical product applied.)
 'RQRWLQVWDOOWKLVSURGXFWLQDUHIULJHUDWHGZDUHKRXVHKHDWHG
swimming pool or other location where the temperature and hu-
PLGLW\DUHVLJQL¿FDQWO\GLIIHUHQW
(Failure to heed this warning may result in electrical shock or
malfunction.)
- The electro-magnetic susceptibility has been chosen at a level
WKDWJDLQVSURSHURSHUDWLRQLQUHVLGHQWLDODUHDVRQEXVLQHVVDQG
OLJKWLQGXVWULDOSUHPLVHVDQGRQVPDOOVFDOHHQWHUSULVHVLQVLGHDV
well as outside of the buildings. All places of operation are charac-
terised by their connection to the public low voltage power supply
system.
5. Installing the Fresh Master
5.1. Fixing hanging bolts
(Use M10 or M12 hanging bolts. The bolts and washers should be
VXSSOLHGLQWKH¿HOG
(Give site of suspension strong structure.)
Hanging structure
- Ceiling: The ceiling structure varies from one building to another.
)RUGHWDLOHGLQIRUPDWLRQFRQVXOW\RXUFRQVWUXFWLRQFRPSDQ\
15HLQIRUFLQJWKHFHLOLQJZLWKDGGLWLRQDOPHPEHUVHGJHEHDP
HWFPXVWEHUHTXLUHGWRNHHSWKHFHLOLQJDWOHYHODQGWRSUHYHQW
the ceiling from vibrations.
2Cut and remove the ceiling members.
35HLQIRUFHWKHFHLOLQJPHPEHUVDQGDGGRWKHUPHPEHUVIRU¿[LQJ
the ceiling boards.
 0RXQWWKHZDVKHUVRXWHUGLDPHWHURI!PPIRU0!PP
IRU0DQGQXWVREWDLQHGIURPD¿HOGVXSSO\RQWRWKHSUH
UHFHVVHGKDQJLQJEROWV0RU0DOVRREWDLQHGIURPD¿HOG
VXSSO\DVVKRZQLQWKH¿JXUH
4.1. Install the Fresh Master on a ceiling
strong enough to sustain its weight
Warning:
- The unit must be securely installed on a structure that can
sustain its weight. If the unit is mounted on an unstable
structure, it may fall down causing injuries.
 6HFXULQJLQVWDOODWLRQDQGVHUYLFH
space
 6HOHFWWKHRSWLPXPGLUHFWLRQRIVXSSO\DLUÀRZDFFRUGLQJWRWKH
FRQ¿JXUDWLRQRIWKHURRPDQGWKHLQVWDOODWLRQSRVLWLRQ
 $VWKHSLSLQJDQGZLULQJDUHFRQQHFWHGDWWKHVLGHVXUIDFHVDQG
WKHPDLQWHQDQFHLVPDGHDWWKHVDPHVXUIDFHVDOORZDSURSHU
VSDFHSURSHUO\)RUWKHHI¿FLHQWVXVSHQVLRQZRUNDQGVDIHW\
provide a space as much as possible.
4.3. Standard installation examples
EA
(exhaust)
Maintenance
space
Exhaust grille
Hanging bolt location
Inspection opening
Supply grille
OA
(outdoor)
Duct downward
gradient to wall
(more than 1/30)
Cistern tank 'HLRQL]HU
Duct (provided by
customer) Hanging bolt
(provided by customer)
Deep hood or
weather cover
EA
(exhaust)
OA
(outdoor)
Drain pipe gradient to wall
(more than 1/100)
Supply pipe Inspection
opening
Servicing
valve Exhaust
grille
Supply
grille
RA
(return) SA (supply)
Hanging bolt (M10 or M12)
Nut
Washer
Nut

7
ENGLISH
5.2. Attaching the duct connecting
ÀDQJHV
8VHWKHVFUHZVVXSSOLHGWRVHFXUHWKHGXFWFRQQHFWLQJÀDQJHVWRWKH
Fresh Master.
Caution:
 %HIRUHDWWDFKLQJWKHGXFWFRQQHFWLQJÀDQJHVFKHFNWKDWQR
IRUHLJQPDWWHUVFUDSVRISDSHUYLQ\OHWFKDVIRXQGLWVZD\
inside the main unit.
 5HSODFHWKHVFUHZVWKDWZHUHUHPRYHGZKHQWKHGXFWFRQ-
QHFWLQJÀDQJHZDVUHPRYHGEDFNLQSODFHDQGVHFXUHO\
tighten them.
5.3. Hanging the unit body
+DQJWKHFHLOLQJVXVSHQVLRQ¿[WXUHVRQWKHKDQJLQJEROWVDQG
DGMXVWLQVXFKDZD\WKDWWKHPDLQXQLWLVOHYHO
2. Tighten up securely using double nuts in order to prevent loose-
ness.
Caution:
- When suspending the main unit from the ceiling, do not
handle it in such a way that force will be applied to the con-
trol box.
 )DVWHQWKHERG\VRWKDWLWLVRULHQWHGKRUL]RQWDOO\ZLWKLQ
5.4. When changing the direction of
WKHRXWGRRUVLGHGXFW($2$
5HPRYHWKHÀDQJHFRYHUDQGVXVSHQVLRQ¿[WXUH
5HPRYHWKHIRXUPRXQWLQJVFUHZVIRUWKHÀDQJHFRYHUDQGUH-
PRYHWKHÀDQJHFRYHU
2. Remove the screws at the top mounting position.
5HPRYHWKHFHLOLQJVXVSHQVLRQ¿[WXUHVDQGDWWDFKWKHPDWKLJKHU
mounting positions.
4. Tighten up the screws in the screw hole where the ceiling suspen-
VLRQ¿[WXUHVZHUHUHPRYHGLQRUGHUWRSUHYHQWDLUOHDNV
Mounting screw
'XFWFRQQHFWLQJÀDQJH
0RXQWLQJWKHGXFWFRQQHFWLRQÀDQJH
1. Use the mounting screws provided to mount the duct connection
ÀDQJHWRWKHPDLQERG\
2. Use the four mounting screws that were removed to attach the
ÀDQJHFRYHU
5.5. Connecting the ducts
)LWWKHGXFWVVHFXUHO\LQWRWKHGXFWFRQQHFWLQJÀDQJHVDQGZLQG
DOXPLQLXPWDSHDYDLODEOHIURPD¿HOGVXSSO\DURXQGWKHPWRSUH-
vent air leaks.
2. Suspend the ducts from the ceiling so that their weight will not be
applied to the Fresh Master.
3. The exhaust/outdoor and supply ducts must be covered with heat-
insulating material in order to prevent condensation from forming.
Caution:
- The main unit is equipped with connection locations for equi-
potential connection of ducts.
- Down ward gradient of outdoor duct: 1/30 or more (toward
wall side)
 3URYLVLRQRIGLVWDQFHIRUWKHH[KDXVWRXWGRRUGXFWVLQWDEOH
EHORZWRSUHYHQWUDLQZDWHUIURPVHHSLQJLQ
Model Distance
*8)5'+*8)5' 1 m or more
GUF-100RDH 4 *8)5' 4 2.5 m or more
- Before connecting the ducts, check that no sawdust or any
RWKHUIRUHLJQPDWWHUVFUDSVRISDSHUYLQ\OHWFKDVIRXQG
its way inside the ducts.
- Do not touch the damper plate inside the main unit when con-
necting the ducts.
- Do not install the ducts in the ways illustrated below. Do-
LQJVRZLOOUHGXFHWKHDLUYROXPHDQGJLYHULVHWRDEQRUPDO
sounds.
Duct
Taping
Aluminium tape
Heat-insulating material
Exhaust/outdoor/supply ducts
'XFWFRQQHFWLQJÀDQJH
Main unit
- Extremely
sharp bends
- Multiple bends
- Bends right next
to the outlet
- Extreme reduction in
the diameter of the
connected ducts
Fresh Master
Nut Washer &HOOLQJVXVSHQVLRQ¿[WXUH
GUF-100RDH4
GUF-100RD4
GUF-50RDH4
GUF-50RD4
Screw
Flange cover &HLOLQJVXVSHQVLRQ¿[WXUH
Screw


ENGLISH
6. Supply pipe and drain pipe work
6XSSO\SLSHZRUNLVQRWUHTXLUHGIRU*8)5'2QO\SHUIRUP
the drain pipe work.
6.1. Supply pipe work
1. &RQQHFWDFRPPHUFLDOO\DYDLODEOHLQWHUORFNHGÀH[LEOHPHWDOKRVH
RUWKHHTXLYDOHQWEHWZHHQWKHZDWHUVXSSO\SLSHDQGWKHZDWHU¿OOHU
hole when performing pipe work for the water supply.
- Set the water pressure between 2u104Pa to 49u104Pa.
- Install the servicing valve near the strainer then install the
supply pipe.
Caution:
- The supply water should meet public waterworks standards,
DQGKDYHDKDUGQHVVOHVVWKDQPJ , otherwise the hu-
PLGL¿HUZLOOFORJXS
 ,QVWDOOWKHGLVFKDUJHDQGVHUYLFLQJYDOYHLQORFDWLRQVDFFHV-
sible from the inspection opening.
- Securely lock the supply pipe so that no force is applied to
the strainer.
- When performing the supply pipe work, wash the pipe with
IUHVKZDWHUSULRUWRLQVWDOODWLRQWRSUHYHQWVDZGXVWHWFIURP
HQWHULQJRULQVWDOODGLVFKDUJHYDOYHLQWKHSLSLQJDQGVXI¿-
ciently conduct water discharge before using until the water is
clear.
- Take caution as to not let cutting oil or detergent from entering.
- The supply and drain pipes must be installed as such that
WKH\GRQRWUHVWRQWKH0DLQWHQDQFHFRYHUDQGFRYHUKXPLGL-
¿HU
- The supply and drain pipes must be properly installed so that
there is no water leak.
 7RSUHYHQWIUHH]LQJZKHQQRWXVLQJWKHXQLWIRUORQJSHULRGV
RIWLPHFORVHWKHVHUYLFLQJYDOYHRSHQWKHGLVFKDUJHYDOYH
DQGUHPRYHWKHVHUYLFLQJYDOYHDQGDQ\ZDWHULQWKHXQLWV
VXSSO\ZDWHUHQWUDQFH$IWHUUHPRYLQJWKHVHUYLFLQJYDOYH
DQGZDWHUFORVHWKHGLVFKDUJHYDOYH
)UHH]HSUHYHQWLRQZRUNIRUH[WUHPHO\FROGDUHDV
3HUIRUPIUHH]HSUHYHQWLRQE\ZUDSSLQJDIUHH]HSUHYHQWLRQ
KHDWHU¿HOGVXSSO\RQWKHVXSSO\SLSH
-
:UDSDIUHH]HSUHYHQWLRQKHDWHUDOOWKHZD\WRWKH)UHVK0DV-
ter.
- Insulation work must be performed upon the heater as well.
:UDSSLQJWKHIUHH]HSUHYHQWLRQ
heater.
6.2. Drain pipe work
1. Connect a vinyl chloride VP25 elbow to the drain discharge port.
2. The drain pipe must be properly insulated from the drain dis-
charge port.
Caution:
- The pipe must be installed with gradient of more than 1/100.
- The drain pipe must be installed so that water does not ac-
cumulate inside.
- Check to make sure that the end of the drain pipe is at a
location where discharge is possible and that the pipe can be
properly drained.
- Do not install the drain pipe as shown below.
 7KLVZLOOUHVXOWLQLQVXI¿FLHQWGUDLQDJH
- Do not insert the tip of the drain pipe into a gutter or the like.
'RLQJVRZLOOFDXVHWKHJXWWHUWRIUHH]HLQWKHHYHQWRIKHDY\
snowfall, resulting in water leakage from the main unit.
3. Make sure the pipe drains water properly.
(1) Remove the maintenance cover (for humidifying).
 5HPRYHWKHVHYHQPRXQWLQJVFUHZVVOLGHWKHPDLQWHQDQFH
FRYHUWRWKHULJKWDQGUHPRYHLWIURPWKHSRWEHOO\VKDSHG
holes (six locations for Model 50).
(2) Pull out the inner lid.
3RXUDSSUR[LPDWHO\FFRIZDWHURQWRWKHGUDLQWUD\
&RQ¿UPWKDWWKHGUDLQSLSHGUDLQVDZD\ZDWHUDWWKHSLSHV¿QDO
exit.
(5) Replace the inner lid and the maintenance cover (for humidify-
ing).
 7KHGLDJUDPVKRZV*8)5'+
Drain discharge port
VP25 elbow
Drain pipe (gradient: 1/100 or more)
Vinyl chloride pipe VP25
o
Drained
water
Odor trap
Air-bleeding
o
Drained
water
Pass-over
Maintenance Cover
KXPLGL¿HU
Drain tray
Water supply
hose
¿HOGVXSSO\
Inner lid
Supply pipe
Servicing valve
Discharge valve
Cap

9
ENGLISH
7. Refrigerant pipe work
Warning:
1HYHUFKDUJHDQ\W\SHVRIUHIULJHUDQWRWKHUWKDQWKRVHVSHFL-
¿HGE\0LWVXELVKL(OHFWULF)DLOXUHWRIROORZWKLVZDUQLQJPD\
UHVXOWLQYLRODWLRQRIODZRUEORZRXWH[SORVLRQRU¿UHZKHQWKH
SURGXFWLVXVHGVHUYLFHGRUGLVSRVHGRI7KHW\SHVRIUHIULJHU-
DQWWKDWFDQEHXVHGDUHVSHFL¿HGLQWKHPDQXDOVXSSOLHGZLWK
WKHSURGXFWRURQWKHSURGXFWQDPHSODWH0LWVXELVKL(OHFWULF
shall assume no liability for any damage, breakdown, malfunc-
tion, or accident resulting from the charging of a refrigerant not
VSHFL¿HGE\0LWVXELVKL(OHFWULF
 5HIULJHUDQWSLSHVSHFL¿FDWLRQV
7RDYRLGGHZGURSVSURYLGHVXI¿FLHQWLQVXODWLRQWRWKHUHIULJHUDQW
and drain pipes.
:KHQXVLQJFRPPHUFLDOO\DYDLODEOHUHIULJHUDQWSLSHVEHVXUHWRXVH
commercially available insulation (with a heat-resisting temperature
RIPRUHWKDQ&DQGWKLFNQHVVJLYHQEHORZRQWRERWKOLTXLGDQG
gas pipes.
Be also sure to use commercially available insulating material (with
DIRUPHGSRO\HWK\OHQHVVSHFL¿FJUDYLW\RIDQGWKLFNQHVVJLYHQ
below) onto all pipes which pass through rooms.
16HOHFWWKHWKLFNQHVVRILQVXODWLQJPDWHULDOE\SLSHVL]H
3LSHVL]H ,QVXODWLQJPDWHULDOVWKLFNQHVV
6.4 mm to 25.4 mm More than 12 mm
28.6 mm to 38.1 mm More than 15 mm
2If the unit is used on the highest story of a building and under
FRQGLWLRQVRIKLJKWHPSHUDWXUHDQGKXPLGLW\LWLVQHFHVVDU\
WRXVHSLSHVL]HDQGLQVXODWLQJPDWHULDOVWKLFNQHVVPRUHWKDQ
those given in the table above.
HJPPWKLFNQHVVLVQHFHVVDU\XQGHU&DQG5+
3,IWKHUHDUHFXVWRPHUVVSHFL¿FDWLRQVVLPSO\IROORZWKHP
45HIULJHUDQWSLSHVSHFL¿FDWLRQV
Model
Item GUF-50RDH4
GUF-50RD4
GUF-100RDH4
GUF-100RD4
Refrigerant pipe
(Flare connection)
/LTXLGSLSH ø6.35 ø9.52
Gas pipe ø12.7 ø15.88
57RUTXHVSHFL¿FDWLRQV
Outerdia of copper pipe 7LJKWHQLQJWRUTXH
ø6.35 14 - 18 N.m
ø9.52 34 - 42 N.m
ø12.7 49 - 61 N.m
ø15.88 68 - 82 N.m
6 Refrigerant system diagram
Gas pipe thermistor TH3
/LTXLGSLSHWKHUPLVWRU7+
Strainer Flare con-
nection
Heat exchanger
Strainer
Linear expansion valve
7.2. Refrigerant piping work
This piping work must be done in accordance with the installation
manuals for both outdoor unit and BC controller (simultaneous cool-
ing and heating series R2).
- With R2 systems connect Fresh Masters to BC controllers.
- For constraints on pipe length and allowable difference of eleva-
WLRQUHIHUWRWKHRXWGRRUXQLWPDQXDO
 7KHPHWKRGRISLSHFRQQHFWLRQLVÀDUHFRQQHFWLRQ
 $IWHU¿QLVKLQJWKHSLSLQJZRUNFKHFNJDVOHDNDJH
Cautions On Refrigerant Piping
%HVXUHWRXVHQRQR[LGDWLYHEUD]LQJIRUEUD]LQJWRHQVXUH
that no foreign matter or moisture enter into the pipe.
%HVXUHWRDSSO\UHIULJHUDWLQJPDFKLQHRLORYHUWKHÀDUHFRQ-
nection seating surface and tighten the connection using a
double spanner.
3URYLGHDPHWDOEUDFHWRVXSSRUWWKHUHIULJHUDQWSLSHVRWKDW
no load is imparted to the Fresh Master end pipe. This metal
EUDFHVKRXOGEHSURYLGHGFPDZD\IURPWKH)UHVK0DV-
WHU¶VÀDUHFRQQHFWLRQ
Warning:
:KHQLQVWDOOLQJDQGPRYLQJWKHXQLWGRQRW
charge it with refrigerant other than the refrigerant
5$5&VSHFL¿HGRQWKHXQLW
 0L[LQJRIDGLIIHUHQWUHIULJHUDQWDLUHWFPD\FDXVHWKHUHIULJHUDQW
cycle to malfunction and result in severe damage.
Caution:
- Use refrigerant piping made of C1220 (CU-DHP) phosphorus
GHR[LGL]HGFRSSHUDVVSHFL¿HGLQWKH-,6+³&RSSHUDQG
copper alloy seamless pipes and tubes”. In addition, be sure
that the inner and outer surfaces of the pipes are clean and
IUHHRIKD]DUGRXVVXOSKXUR[LGHVGXVWGLUWVKDYLQJSDU-
ticles, oils, moisture, or any other contaminant.
 1HYHUXVHH[LVWLQJUHIULJHUDQWSLSLQJ
- The large amount of chlorine in conventional refrigerant and
refrigerator oil in the existing piping will cause the new refriger-
ant to deteriorate.
- Store the piping to be used during installation indoors and
NHHSERWKHQGVRIWKHSLSLQJVHDOHGXQWLOMXVWEHIRUHEUD]LQJ
 ,IGXVWGLUWRUZDWHUJHWVLQWRWKHUHIULJHUDQWF\FOHWKHRLOZLOO
deteriorate and the compressor may fail.
 8VHHVWHURLOHWKHURLORUDON\OEHQ]HQHVPDOODPRXQWDVWKH
UHIULJHUDWRURLOWRFRDWÀDUHVDQGÀDQJHFRQQHFWLRQV)RUXV-
ing R407C, R410A)
- The refrigerant used in the unit is highly hygroscopic and mixes
with water and will degrade the refrigerator oil.

10
ENGLISH
- Make sure to use new refrigerant piping.
 :KHQXVLQJWKHH[LVWLQJSLSLQJZKLFKXVHG5WDNHFDUHRI
the following points.
5HSODFHWKHÀDUHQXWZLWKWKDWLVDWWDFKHGWRWKHSURGXFW)ODUH
VHFWLRQPXVWEH¿QLVKHGZLWKWKHÀDUHSURFHVVLQJ
- Use of piping with thin wall should be avoided.
A
Pipe Dia. (mm)
Dimension A (mm)
R410A Flare Tool :KHQXVLQJFRQYHQWLRQDOÀDUHWRRO5&
Rigid (clutch type) Imperial (wing nut) type
ø6.35 (1/4”) 0~0.5 1.0 - 1.5 1.5 - 2.0
ø9.52 (3/8”) 0~0.5 1.0 - 1.5 1.5 - 2.0
ø12.7 (1/2”) 0~0.5 1.0 - 1.5 1.5 - 2.5
ø15.88 (5/8”) 0~0.5 1.0 - 1.5 1.5 - 2.5
:KHQDSSO\LQJWKHÀDUHSURFHVVLQJIRUWKHUHIULJHUDQW5$XVLQJFRQYHQ-
WLRQDOWRROVFRQGXFWWKHZRUNUHIHUULQJWRWKHDERYH,I\RXXVHWKHFRSSHU
SLSHJDXJHIRUWKHDGMXVWPHQWRISURWUXVLRQPDUJLQ\RXFDQVHFXUHWKH
dimension A.
Copper pipe
Dise
øB
R0.4~R0.8
Copper Pipe O.D.
ø6.35
ø9.52
ø12.7
ø15.88
8.7~9.1
12.8~13.2
16.2~16.6
19.3~19.7
Flare Dimension
Dimension øB(
mm )
&RDWVPDOODPRXQWRIHVWHURLOHWKHURLORUKDUGDON\OEHQ]HQRLORYHU
WKHHQWLUHSHULSKHU\RIÀDUHVHDWVXUIDFH
* Do not coat at the threaded section.
2WKHUZLVH\RXFDQQRWORFNWKHÀDUHQXWVHFXUHO\
0DNHVXUHWRXVHRQO\WKHÀDUHQXWDWWDFKHGWRWKHPDLQXQLW2IIWKHVKHOI
product could be cracked.)

11
ENGLISH
7.3. Request for application of insula-
WLRQWRWKHFRQQHFWRUVRIWKH¿HOG
refrigerant pipe
Check if the parts listed below are included in the package before
installation.
Flare insulation Pipe insulation Tie band
2 pieces 2 pieces 4 pieces
Locally Procured Materials
5HIULJHUDQWSLSH7DSHIRUSLSLQJLQVWDOODWLRQ
After the refrigerant pipe connection is complete,
EHVXUHWRDSSO\LQVXODWLRQWRWKHFRQQHFWRUÀDUH
connection) using the attached insulated pipe as
VKRZQLQWKH¿JXUHEHORZ
 0DNHVXUHQRWWROHDYHDJDSEHWZHHQWKHLQVXODWHGSLSHDQG
WKHLQGRRUXQLWDVZHOODVWKHLQVXODWHGSLSHDQGWKH¿HOG
refrigerant piping.
- Faulty insulation application may cause condensation to form
resulting in water leakage.
 ,QVHUWWKHÀDUHQXWLQWKH¿HOGUHIULJHUDQWSLSLQJSXOOWKHLQVXODWLQJ
PDWHULDOZKHQSHUIRUPLQJIODUHSLSHH[SDQVLRQDQGSXWWKH
insulating material back so that the copper pipe is not exposed.
* Condensation may occur.
:UDSWKHLQVXODWLQJPDWHULDODURXQGWKHÀDUHFRQQHFWLRQDQGWKH
¿HOGUHIULJHUDQWSLSLQJQRJDSVKRXOGH[LVWDQGWHPSRUDULO\¿[
using the tape for piping construction. (It will be clipped by the
LQVXODWLQJSLSHVGHVFULEHGLQWKHVWHSWR¿[
Insulating
material
Insulating
material Pull
Flare nut
Put it back
Insulating
material Flare nut
* No gap should exist
Insulating
material
Field refrigerant
piping
* No gap should exist on
the refrigerant piping body
(Condensation may occur)
:UDSWKHLQVXODWHGSLSHDURXQGWKHÀDUHDUHDDQG¿[WKH
each insulating pipe with a tie band.
* Be sure to perform construction so as not to leave a gap on
WKHLQVXODWHGSLSHMRLQWDUHD&RQGHQVDWLRQPD\RFFXULQ
WKHÀDUHGDUHD
:UDSWKHWDSHIRUSLSLQJFRQVWUXFWLRQDURXQGWKHMRLQWEHWZHHQ
WKHLQVXODWHGSLSHDQGWKH¿HOGUHIULJHUDQWSLSLQJWRSUHYHQWWKH
LQVXODWHGMRLQWIURPEHLQJH[SRVHG
Insulating material
can stick out from
the insulated pipe
Insulated
pipe
Body side
panel
* No gap should exist
on the unit body
Field refrigerant
piping
Unit body
Joint is the upper
side (Target: Within
the range of 30°
right or left from the
right above)
* No gap
should exist
(Condensation
may occur)
Insulated pipe * No gap should exist
(Condensation may
occur)
Tie band
[Good
example]
[Bad
example]
Unit (mm)
Field refrigerant
piping
(Locally prepared)
Tape wrapped area
Unit body

12
ENGLISH
(OHFWULFDOZLULQJ
 3UHFDXWLRQVRQHOHFWULFDOZLULQJ
Warning:
 (OHFWULFDOZRUNVKRXOGEHGRQHE\TXDOL¿HGHOHFWULFDOHQJL-
QHHUVLQDFFRUGDQFHZLWK³(QJLQHHULQJ6WDQGDUGV)RU(OHFWUL-
cal Installation” and supplied installation manuals. Special
circuits should also be used. If the power circuit lacks capac-
ity or has an installation failure, it may cause a risk of electric
VKRFNRU¿UH
1. Be sure to take power from the special branch circuit.
2. Be sure to install an earth leakage isolator to the power.
3. Install the unit to prevent that any of the control circuit cables (Re-
PRWHFRQWUROOHUWUDQVPLVVLRQFDEOHVLVEURXJKWLQGLUHFWFRQWDFW
with the power cable outside the unit.
4. Ensure that there is no slack on all wire connections.
6RPHFDEOHVSRZHU5HPRWHFRQWUROOHUWUDQVPLVVLRQFDEOHV
above the ceiling may be bitten by mice. Use as many metal pipes
as possible to insert the cables into them for protection.
6. Never connect the power supply cable to leads for the transmis-
sion cables. Otherwise the electronic circuit would be broken.
%HVXUHWRFRQQHFWFRQWUROFDEOHVWRWKH)UHVK0DVWHU5HPRWH
FRQWUROOHUDQGWKHRXWGRRUXQLW
8. Put the unit to the ground on the outdoor unit side.
9. Select control cables from the conditions given below.
Caution:
- Be sure to put the unit to the ground on the outdoor unit side.
Do not connect the earth cable to any gas pipe, water pipe,
lightening rod, or telephone earth cable. Incomplete ground-
ing may cause a risk of electric shock.
 7\SHVRIFRQWUROFDEOHV
:LULQJ01(7WUDQVPLVVLRQFDEOHV
- Types of transmission cables
Design wiring in accordance with the following table <Table 1>.
- Cable cross-sectional area 1.25 mm2to 2.00 mm2
<Table 1>
6\VWHPFRQ¿JXUDWLRQ For a single-refrigerant system For a multi-refrigerant system
Transmission cable length Less than 120 m More than 120 m Regardless of length
Facility example
IRUQRLVHMXGJPHQW
Residence or independent
store without noise
%XLOGLQJFOLQLFKRVSLWDORUFRPPXQLFD-
tions station without noise supposedly
JHQHUDWHGIURPLQYHUWHUHTXLSPHQW
SULYDWHSRZHUJHQHUDWRUKLJKIUHTXHQF\
PHGLFDOHTXLSPHQWUDGLRXVHGFRP-
PXQLFDWLRQVHTXLSPHQWDQGVRRQ
All facilities
Types of transmission
cables
9&7)9&7).&99
&9699599)9&7RU
shielding wire CVVS or
CPEVS
Shielding wire CVVS or CPEVS
2. Remote controller cables
MA Remote controller (PAR-21MAA) 0(5HPRWHFRQWUROOHU3$5)0($3$&6(&5$
Wire Type
Type 9&7)9&7).&99&96
99599)9&7
10 m or shorter If the length exceeds 10 m.
9&7)9&7).&99&96
99599)9&7
M-NET transmission cable
Number of conductors 2-conductor cable
Wire diameter 0.3 - 1.25 mm2(Note 1) 0.3 - 1.25 mm2(Note 1)
(0.75 - 1.25 mm2) (Note 2)
Total Length Max. 200 m Max. 10 m
,IWKHOHQJWKH[FHHGVPNHHSWKH
length within the maximum length of
communications lines between indoor
and outdoor units.
Note1 For work purposes, a wire diameter of 0.75 mm2is recommended.
1RWH,I\RXDUHUXQQLQJWKHZLUHVWRWKH3$&6(&5$WHUPLQDOEORFNXVHWKHZLUHGLDPHWHUVKRZQLQ

13
ENGLISH
 (OHFWULFDOZLULQJGLDJUDP
GUF-50, 100RDH4
127( 707070VKRZQLQGRWWHGOLQHVDUH¿HOGZRUN
2. Be sure to connect the grounding wire.
3. Isolator should be provided by the customer.
4. MARK : indicates WHUPLQDOEORFN : connector
: board insertion connector or fastening connector of control board.
C
C
FUSE1
<PAR-F27MEA>
<PAR-21MAA>
Remote Controller
L
N
TM2
TM3
PE
N
Uncharged a-contact
Humidistat
240VAC more than 10mA
31
Operation monitor output
AC240V 1A AC220V 100mA
DC 24V 1A DC 5V 100mA
MAX MIN
Malfunction monitor output
MAX MIN
AC240V 1A AC220V 100mA
DC 24V 1A DC 5V 100mA
Shield wire
M-NET Remote controller
Fresh Master
To Outdoor Unit, BC Controller
X09
X08
M-NET transmission cable
DB901
1
6
7
1
3
1
3
1
ZNR901ZNR902 DSA1
X05
X04
X07
X06
X03
X02
POWER SUPPLY
569Nȍ
TM1
L
Liquid
pipe
TH2
Gas
pipe
TH3
SUPPLY FAN
EXHAUST FAN 250V 6.3A
1
3
1
3
ISOLATOR
LED3
8
S
B
A
2
7
9
10
11
BROWN BROWN
BLUE
RED
BLUE
BROWN
FAN1
FAN4
TR
CN3T
CNT
CND1 CND2
GREEN/YELLOW
1
12
7+5$
7+2$
YELLOW
YELLOW
BLACK
BLACK
PINK
PINK
GRAY
GRAY
YELLOW
YELLOW
ORANGE
ORANGE
BLUE
WHITE
RED
BLACK
PINK
BLACK
PINK
BLUE
WHITE
RED
CN22
CN29
CN21
SW1
SW2
SW3
SW12
LED1
LED2
SW11
SW14
CN20
SV1
SV2
LS
W.S
GM
M1
M2
RED
RED
PURPLE
PURPLE
BROWN
RED
PURPLE
ORANGE
PINK
WHITE
LEV CN60
CN70
CNL
CN27
CN4D
RED
RED
FAN2
FAN3
220-240V 50Hz
-
+
Warning
%HIRUHREWDLQLQJDFFHVVWRWHUPLQDOVDOOVXSSO\FLUFXLWV
must be disconnected.
6<0%2/(;3/$1$7,21
Symbol Name Symbol Name Symbol Name
M1
M2
C
W.S
SV1
SV2
TH1
TH2
TH3
TH4
LEV
RSV
Fan motor (exhaust)
Fan motor (supply)
Capacitor
Water sensor
Solenoid valve (pressure regulator)
Solenoid valve (exhaust)
Thermistor (outdoor air temp. detection)
7KHUPLVWRUSLSHWHPSGHWHFWLRQOLTXLG
Thermistor (pipe temp. detection/gas)
Thermistor (room air temp. detection)
Electronic linear expansion valve
Resistance(solenoid valve)
TM1
TM2
TM3
SW1
SW2
SW3
SW11
SW12
SW14

$%
S
Terminal block (power supply)
Terminal block (transmission)
7HUPLQDOEORFNKXPLGLVWDWPRQLWRU
Switch (function selection)
Switch (capacity code setting)
Switch (function selection)
Switch (1st digit address set)
Switch (2nd digit address set)
Switch (branch NO. set)
Remote control terminal
M-NET transmission terminal
Shield
&1'&1'
X02-X09
TR
GM
LS
LED1
LED2
LED3
Connector (power supply)
Relay
Transformer
Damper motor
Limit switch
Power supply monitor
MA Remote controller Power
supply monitor
M-NET Power supply monitor

14
ENGLISH
GUF-50100RD4
-
+
C
C
AC240V 1A AC220V 100mA
DC 24V 1A DC 5V 100mA
MAX MIN
Malfunction monitor output
MAX MIN
AC240V 1A AC220V 100mA
DC 24V 1A DC 5V 100mA
TM1
<PAR-F27MEA>
L
<PAR-21MAA>
Remote Controller
220-240V 50Hz
N
L
TM2
TM3
PE
N
31
Operation monitor output
Shield wire
M-NET Remote controller
Fresh Master
To Outdoor Unit, BC Controller
X09
X08
M-NET transmission cable
DB901
1
6
7
1
3
1
3
1
ZNR901ZNR902 DSA1
X05
X04
X07
X06
X03
X02
POWER SUPPLY
Liquid
pipe
TH2
Gas
pipe
TH3
SUPPLY FAN
EXHAUST FAN
3
1
1
3
FUSE1
250V 6.3A
ISOLATOR
FAN4
TR
CN3T
CNT
CND1 CND2
GREEN/YELLOW
1
12
TH4(RA)
TH1(OA)
YELLOW
YELLOW
PINK
PINK
GRAY
GRAY
YELLOW
YELLOW
ORANGE
ORANGE
BLACK
PINK
BLUE
CN22
CN29
CN21
SW1
SW2
SW3
SW12
LED1
LED2
SW11
SW14
CN20
LS
W.S
GM
M1
M2
BROWN
RED
PURPLE
ORANGE
PINK
WHITE
LEV CN60
CN70
CNL
CN27
CN4D
FAN2
FAN3
LED3
S
B
A
2
7
8
9
10
11
BROWN BROWN BLUE RED
BLUE
BROWN
FAN1
RED
WHITE
PINK
BLACK
RED
WHITE
BLUE
BLACK
BLACK
127( 707070VKRZQLQGRWWHGOLQHVDUH¿HOGZRUN
2. Be sure to connect the grounding wire.
3. Isolator should be provided by the customer.
4. MARK : indicates WHUPLQDOEORFN : connector
: board insertion connector or fastening connector of control board.
Warning
%HIRUHREWDLQLQJDFFHVVWRWHUPLQDOVDOOVXSSO\FLUFXLWV
must be disconnected.
6<0%2/(;3/$1$7,21
Symbol Name Symbol Name Symbol Name
M1
M2
C
W.S
TH1
TH2
TH3
TH4
LEV
Fan motor (exhaust)
Fan motor (supply)
Capacitor
Water sensor
Thermistor (outdoor air temp. detection)
7KHUPLVWRUSLSHWHPSGHWHFWLRQOLTXLG
Thermistor (pipe temp. detection/gas)
Thermistor (room air temp. detection)
Electronic linear expansion valve
TM1
TM2
TM3
SW1
SW2
SW3
SW11
SW12
SW14

$%
Terminal block (power supply)
Terminal block (transmission)
7HUPLQDOEORFNKXPLGLVWDWPRQLWRU
Switch (function selection)
Switch (capacity code setting)
Switch (function selection)
Switch (1st digit address set)
Switch (2nd digit address set)
Switch (branch NO. set)
Remote control terminal
M-NET transmission terminal
S
&1'&1'
X02-X09
TR
GM
LS
LED1
LED2
LED3
Shield
Connector (power supply)
Relay
Transformer
Damper motor
Limit switch
Power supply monitor
MA Remote controller Power
supply monitor
M-NET Power supply monitor

15
ENGLISH
 3RZHUVXSSO\ZLULQJ
3RZHUFDEOHVL]HPP2or more
[Selecting non-fuse isolator (NF) or earth leakage isolator (NV)]
To select NF or NV instead of a combination of Class B fuse with
VZLWFKXVHWKHIROORZLQJ
 ,QWKHFDVHRI&ODVV%IXVHUDWHG$RU$
NF model name (MITSUBISHI): NF30-CS (15 A) (20 A)
NV model name (MITSUBISHI): NV30-CA (15 A) (20 A)
Use an earth leakage isolator with a sensitivity of less than 30 mA
0.1 sec.
Caution:
- Do not use anything other than the correct capacity isola-
tor and fuse. Using fuse, wire or copper wire with too large
FDSDFLW\PD\FDXVHDULVNRIPDOIXQFWLRQRU¿UH
 &RQQHFWLQJWKH5HPRWHFRQWURO-
ler, the Fresh Master and outdoor
transmission cables
(The Remote controller is optionally available.)
 &RQQHFW)UHVK0DVWHU70DQGRXWGRRUXQLW7%1RQSRODUL]HG
2-wire)
The “S” on Fresh Master TM2 is a shielding wire connection. For
VSHFL¿FDWLRQVDERXWWKHFRQQHFWLQJFDEOHVUHIHUWRWKHRXWGRRU
unit installation manual.
- Install the Remote controller following the manual supplied with
the Remote controller.
>)RUXVLQJWKH0(5HPRWHFRQWUROOHU@
Connect the “A” and “B” on Fresh Master TM2 to the Remote
FRQWUROOHU1RQSRODUL]HGZLUH&RQQHFWWKH5HPRWHFRQWUROOHUV
WUDQVPLVVLRQFDEOHZLWKLQP,IWKHGLVWDQFHLVPRUHWKDQP
use a 1.25 mm2to 2.0 mm2cable.
[For using the MA Remote controller]
Connect the “1” and “2” on Fresh Master TM2 to the Remote control-
OHU1RQSRODUL]HGZLUH&RQQHFWWKH5HPRWHFRQWUROOHUVWUDQVPLV-
sion cable within 200 m.
SBA21 SBA21
SBA21
Switch 16 A
Over current
protection 16 A
Total operating current
be less than 16 A Pull box
Fresh Master
Switch 16 A
Over current
protection 16 A
Fresh Master
Terminal block for outdoor
transmission cable
TM2
(Fresh Master) TM2
(after Fresh Master)
Terminal block for the
Fresh Master transmis-
sion cable
TB3 MA Remote controller
(PAR-21MAA)
ME Remote
controller
(PAR-F27MEA)
- 24 to 30 V DC between M1 and M2
Longest wiring length (L1+L2+L4 or L1+L3): less than 200 m
Longest wiring length (L2+L3+L4): less than 500 m
Length between the Fresh Master and the Remote controller ( ):
within 10 m
Notes:
 3XWWKHWUDQVPLVVLRQFDEOHHDUWKYLDWKHRXWGRRUXQLWVHDUWK
terminal to the ground.
*2 If the Remote controller cable exceeds 10 m, use a 1.25 mm2
to 2.0 mm2FDEOHRYHUWKHH[FHHGHGSRUWLRQDQGDGGWKDW
exceeded portion to within 200 m.
*3 The BC controller is required only for simultaneous cooling
and heating series R2.
[Constraints on transmission cable]
G
IJJJ
KK
KK
JJ
LK
H
*1
*3
L1
L2 L4
L3
*2
GOutdoor unit
HEarth
IBC controller
JFresh Master
KRemote controller
L 1RQSRODUL]HGZLUH

16
ENGLISH
 &RQQHFWLQJHOHFWULFDOFRQQHFWLRQV
1. Remove the 4 screws to remove the control box cover.
,QVWDOOD3*FRQQHFWLRQRUWKHOLNHWKHQFRQQHFWWKHSRZHUVXSSO\
cable to the TM1 terminal block.
PE
N
L
Caution:
- Wire the power supply so that no tension is imparted. Other-
ZLVHGLVFRQQHFWLRQKHDWLQJRU¿UHPD\UHVXOW
Screw
Controller box cover
3. Connect the transmission line to the TM2 terminal block as shown
in the diagram.
11
10
9
8
7
1
2
A
B
S
12
:KHQFRQQHFWLQJWKHKXPLGLVWDWLQSXWUHPRYHWKHVKRUWFLUFXLW
SLHFHIURPWKH70WHUPLQDOEORFNDVVKRZQLQWKHGLDJUDPWKHQ
install a PG connector and connect to the TM3 terminal block.
 7KHKXPLGLVWDWLVWKHVHQVRUGHVLJQHGVSHFL¿FDOO\IRUWKHFRQWURO
of moisture environment.
The suitable model in this stage :
Uncharged a-contact turns on when atmospheric moisture
content becomes less than your preset minimum allowable
percentage.
Terminal block (TM1)
Terminal block for power supply cable (for TM1)
Grounding wire
PG connection or the like
Power supply cable
Name plate
Terminal block for TM2
M-NET trans-
mission
cable
Shield
wire
Terminal block (TM3)
Transmission cable
to terminal block
for Fresh Master
outdoor and BC
controller
Humidistat *
Uncharged
a-contact
240 V AC more
than 10 mA
Short-circuit
piece
Terminal block (TM2)
Humidistat cable
PVC insulated PVC
MDFNHWHGFRQWUROFDEOH
mm2. Recommended type
+99)+99)
PAR-21MAA
(Remote
controller)
PG connection
or the like
Terminal block for TM3
Humidistat
Malfunction
monitor
output
Operation
monitor
output
Remote
Controller

17
ENGLISH
9. Feature settings
Caution:
* Always turn off the main power supply.
5HPRYHWKHFRQWUROER[FRYHU
9.1. Address setting
(Determining the address depends on the own-site system. Please
VHHWRWHFKQLFDOUHIHUHQFHVHWF
Remove the control box cover.
Turn the address setting switch on the board using a Phillips screw-
driver.
- The left side (SW12) shows the second digit and the right side
6:VKRZVWKH¿UVWGLJLW
- The switch is set to 00 when factory shipped.
- Set the address between 1 and 50.
9.2. When using an R2 series external
unit, setting for the branch No. is
also required.
Turn the branch controller No. setting switch (SW14) on the board
using a Phillips screwdriver.
- Set the refrigerant pipe of the external unit and the connected
branch controller to the same number.
- The switch is set to 0 when factory shipped.
SW12 SW11 SW14
Second digit First digit Branch No.
9.3. Feature select switches
(SW1, SW3, SW2)
* When shipped from the factory
,WHPVFRQFHUQLQJKXPLGLI\LQJLVIRU*8)5'+RQO\
SW1
OFF ON
Fan test operation switch (test operation when ON)
Filter maintenance display (displayed when ON)
Filter maintenance time setting switch
Do not touch
Damper motor test operation (test operation when
ON)
6ROHQRLGYDOYHWHVWRSHUDWLRQIRUKXPLGL¿HUZDWHUVXSSO\
WHVWRSHUDWLRQZKHQ21'RQRWWRXFK*8)5'
Auto-recovery during power failure (active when on)
Power supply ON/OFF (test operation when on)
SW3 ---- GUF-50, 100RDH4
OFF ON
Synchronous air-conditioning switch (async when
ON)
+XPLGL¿HUPRGH2))KXPLGL¿HU21KHDWVDYH
Heater operation during synchronous operation/
stop temperature switch
Exhaust fan operation when supply fan is stopped
(exhaust fan also stopped when ON)
Do not touch
$XWRPDWLFKXPLGL¿HUFRQWURODFWLYHZKHQ21
Do not touch
SW3 ---- GUF-50, 100RD4
OFF ON
Synchronous air-conditioning switch (async when
ON)
Do not touch
Exhaust fan operation when supply fan is stopped
(exhaust fan also stopped when ON)
Do not touch
Room temperature detected at main unit is decreased
E\&ZKHQKHDWLQJ2))DFWLYH21LQDFWLYH
Room-temperature sensor location (OFF: main
XQLW21UHPRWHFRQWURO
Do not touch
SW2
OFF ON
Do not touch
Fan speed control method select switch
2))21¿[WR+LJKVSHHG
%RWK21V¿[WR/RZVSHHG
Do not touch
Notes:
 7KHVZLWFKHVDUHYHUWLFDOIRUH[SODQDWLRQSXUSRVHV
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10