Mitsubishi Electric PAC-IF061B-E User manual

English
FLOW TEMP. CONTROLLER [MASTER] (Cased)
PAC-IF061B-E
PAC-IF062B-E
PAC-IF063B-E
FLOW TEMP. CONTROLLER [SLAVE] (Cased)
PAC-SIF051B-E
OPERATION MANUAL
For safe and correct use, please read this operation manual thoroughly before operating the FTC unit.
FOR USER
INSTALLATION MANUAL
For safe and correct use, read this manual thoroughly before installing the FTC unit.
FOR INSTALLER

2
Contents
Before installing the FTC unit, make sure you read all the “Safety pre-
cautions”.
Please report to your supply authority or obtain their consent before
connecting this equipment to the power supply system.
Warning:
Precautions that must be observed to prevent injuries or death.
Caution:
Precautions that must be observed to prevent damage to the unit.
After installation, perform the test run to ensure normal operation. Then explain
to your customer the “Safety Precautions” *1, use, and maintenance of the unit
based on the information in this manual. This manual must be given to the user.
This manual must always be kept by the actual users.
*1 “Safety Precautions” for user is indicated on page 33.
: This indicates a part which must be grounded.
Warning:
Carefully read the labels attached to the unit.
Warning:
• Theunitmustnotbeinstalledbytheuser.Askaninstalleroran
authorized technician to install the unit. If the unit is installed improperly,
electricshock,orremaybecaused.
• Forinstallationwork,followtheinstructionsintheInstallationManualand
use tools and pipe components specically made for use with refrigerant
speciedintheoutdoorunitinstallationmanual.
• Theunitmustbeinstalledaccordingtotheinstructionsinordertomini-
mize the risk of damage by earthquakes, typhoons, or strong winds.
Improperly installed units may fall down and cause damage or injuries.
•
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
and cause damage or injuries.
• Allelectricworkmustbeperformedbyaqualiedtechnicianaccordingto
local regulations and the instructions given in this manual. The unit must
be powered by dedicated power lines and the correct voltage and circuit
breakersmustbeused.Powerlineswithinsufcientcapacityorincorrect
electricalworkmayresultinelectricshockorre.
• Only the specied cables can be used for wiring. Connections must be
made securely without tension on the terminals. If cables are connected
orinstalledimproperly,itmayresultinoverheatingorre.
• Terminalblock cover panel oftheunitmustbermlyxed.Ifthe cover
panel is mounted improperly, dust and moisture may enter the unit, and it
maycauseelectricshockorre.
• Makesure touseaccessoriesauthorizedby Mitsubishi Electricandask
an installer or an authorized technician to install them. If accessories are
improperlyinstalled,itmaycauseelectricshock,orre.
• Donotremodel the unit. Consult aninstallerforrepairs.Ifalterationsor
repairsarenotperformedcorrectly,itmaycauseelectricshockorre.
• Theuser shouldneverattemptto repairtheunitortransferittoanother
location. If the unit is installed improperly, it may cause electric shock or
re.IftheFTCunitneedstoberepairedormoved,askaninstalleroran
authorized technician.
• Duringinstalling aheatpumpsystem, keepwaterfromsplashingonthe
FTC unit.
• Wheninstallingsensorsandparts,donotexposetheterminals.
1.1 Before installation (Environment)
Caution:
• DonotinstalltheFTCunitinoutdoorlocationasitisdesignedforindoor
installation only. Otherwise electric shock or breakdown may be caused
by water, wind or dust.
•
Donot use theunit in anunusual environment. Ifthe FTC unitis installed
orexposedtosteam,volatileoil(includingmachineoil),orsulfuricgas,or
exposedtobrinyair,theinternalpartscanbedamaged.
• Donot install theunit where combustible gases mayleak, be produced,
ow, or accumulate. If combustible gas accumulates around the unit, it
maycausereorexplosion.
• Wheninstallingtheunitin ahospitalorinabuildingwhere communica-
tions equipment are installed, you may need to take measures to prevent
noise and electronic interference. Inverters, home appliances, high-
frequency medical equipment, and radio communications equipment can
cause the FTC unit to malfunction or to breakdown. At the same time, the
noise and electric interference from the FTC unit may disturb the proper
operation of nearby medical equipment, and communications equipment.
1.2 Before installation or relocation
Caution:
• Beverycarefulwhenmovingtheunits.Donotholdthepackagingbands.
Wear protective gloves to unpack and to move the units, in order to avoid
injury to your hands.
1.3 Before electric work
Caution:
• Besure toinstallacircuitbreaker.Ifitisnotinstalled,theremaybe a
risk to get an electric shock.
• Forthepowerlines,usestandardcables of sufficient capacity. Other-
wise,itmaycauseashortcircuit,overheating,orre.
• Wheninstallingthepowerlines,donotapplytensiontothecables.The
cablesmaybecutoroverheatedresultinginare.
• Makesuretogroundtheunit.Donotconnectthegroundwiretogasor
water pipes, lightning rods, or telephone grounding lines. If the unit is
not properly grounded, there may be a risk to get an electric shock.
• Makesure to use circuitbreakers(groundfaultinterrupter,isolating
switch(+Bfuse),andmoldedcasecircuitbreaker)withthespeciedca-
pacity.Ifthecircuitbreakercapacityislargerthanthespeciedcapacity,
breakdownorremayresult.
• Besureto safely disposeofthe packaging materials. Packaging materi-
als, such as nails and other metal or wooden parts may cause injuries.
• DonotwashtheFTCunit.Youmayreceiveanelectricshock.
1. Safety precautions.....................................................................................2
2. Installing the FTC unit ...............................................................................3
3. System ......................................................................................................5
4. Electrical work .........................................................................................12
5. Dip switch setting ....................................................................................27
6. Before test run.........................................................................................32
7. Main remote controller operation.............................................................33
8. Troubleshooting ......................................................................................49
9. Multiple outdoor units control ..................................................................54
10. Supplementary information ....................................................................66
Local application factors................................................................................67
1. Safety precautions FOR INSTALLER
“FTC (Master)” is the abbreviation of “Flow Temperature Controller [Master]”, which is described as “FTC (Master)” in this manual.
“FTC (Slave)” is the abbreviation of “Flow Temperature Controller [Slave]”, which is described as “FTC (Slave)” in this manual.
In this manual, “FTC” that is not followed by “(Master)” or “(Slave)” means “FTC (Master and Slave)”.
Mitsubishi Electric is not responsible for the failure of locally supplied parts.

3
1.4 Before starting the test run
Caution:
• Turnon the mainpowerswitchoftheoutdoorunitmore than 12 hours
before starting operation. Starting operation immediately after turning on
the power switch can severely damage the internal parts. Keep the main
power switch turned on during the operation period.
• Inheatingmode,toavoidtheheatemittersbeingdamagedbyexcessive-
lyhotwater,setthe targetowtemperaturetoaminimumof2ºCbelow
themaximumallowable temperature of all the heatemitters.ForZone2,
setthetargetowtemperaturetoaminimumof5ºCbelowthemaximum
allowableowtemperatureofalltheheatemittersinZone2circuit.
• Beforestartingoperation,checkthatallprotectivepartsarecorrectlyin-
stalled. Make sure not to get injured by touching high voltage parts.
• Donot touchanyswitchwithwethands. Theremaybearisktoget an
electric shock.
• Afterstoppingoperation,make suretowaitatleast5 minutes before
turning off the main power. Otherwise, it may cause breakdown.
1.5 Electric booster and immersion heaters
Warning:
• FTChas signal outputs forheatershoweveritcannotisolatepowerto
them in the event of overheating. All electrical heaters used on the water
circuit must have.
a) A thermostat to prevent overheating.
b) A non-self resetting thermal mechanism to prevent overheating.
Abbreviations and glossary
Abbreviations/Word Description
Ambient temperature The outdoor temperature
Freeze stat. function Heating to prevent water pipes freezing
ASHP/HP Air source heat pump
COP Coefcient of performance the efciency of the heat pump
Cylinder unit Indoor unvented DHW tank and component plumbing parts
Hydrobox Indoor unit housing the component plumbing parts (NO DHW tank)
DeltaT Difference in temperature between two system locations.
DHW mode Domestic hot water heating mode for showers, sinks, etc
Flow temperature Temperature at which water is delivered to the primary circuit
FTC (Master) Flow temperature controller, the circuit board in charge of controlling the system, master board for multiple outdoor units control
FTC (Slave) Slave board for multiple outdoor units control
Compensation curve mode Space heating incorporating outdoor temperature compensation
Heating mode Space heating through radiators or under oor heating
Cooling mode Space cooling through radiators or under oor cooling
Legionella Bacteria potentially found in plumbing, showers and water tanks that may cause Legionnaires disease
LP mode Legionella prevention mode – a function on systems with tanks to prevent the growth of legionella bacterium
Packaged model Plate heat exchanger (Refrigerant - Water) in the outdoor heat pump unit
Split model Plate heat exchanger (Refrigerant - Water) in the indoor unit
TRV Thermostatic radiator valve – a valve on the entrance or exit of the radiator panel controlling the heat output
1. Safety precautions
2. Installing the FTC unit
2.1. Check the parts (Fig. 2.1.1)
The FTC unit should be supplied with the following parts.
Part name
Wiring
diagram
symbol
Q’ty
PAC-
IF061
PAC-
IF062
PAC-
IF063
PAC-
SIF051
1FTC (master) unit/FTC (slave) unit 1111
2Liquid refrigerant temp. thermistor
(Lead wire: 5m/Red, Connector: 3p/Yellow)
TH2 1 ─ ─ 1
3
Flow water temp. and Return water
temp. thermistor
(Lead wire: Gray (Flow water temp.),
Black(Return water temp.),
Connector: 4p/Red)
THW1/2
1
(5m/5m)
1
(5m/5m)
1
(1.1m/
1.2m)
1
(5m/5m)
4Tank temp. thermistor
(Lead wire: 1.8m/Gray, connector: 2p/white)
THW5 ─ ─ 1─
5Main remote controller cable (10 m) 1 1 1 1
6Main remote controller 1 1 1 ─
7SD memory card 1 1 1 1
1
2,3,4 5
6 7
<Fig. 2.1.1>
Master Slave

4
86.7
22
10
422
338.5
368 (12.5)
12.5
393
Ø5
Ø12
72.4
288.8
207 22
10
254.4 (12.5)
229.4
12.5
Ø12
Ø5
2.3. Installing the FTC unit (Fig. 2.3.1, 2.3.2, 2.3.3, 2.3.4)
1. Remove 2 screws (AScrew) from FTC unit and remove the cover. (See Fig.
2.3.4)
2. Install the 4 screws (locally supplied) in the 4 holes (CHole).
Note: To prevent the unit from falling off the wall, select the appropriate screws
(locally supplied) and secure the base horizontally to the appropriate wall
location.
(See Fig. 2.3.2)
AScrew BCover
CHole for installation DScrew
Note: Do not remove the screws Das the screws are the component parts of the
cover and are not used for the installation of cover.
Weight
PAC-IF061B-E 4.0 kg
PAC-IF062/063B-E 4.4 kg
PAC-SIF051B-E 1.9 kg
Allowable ambient temperature 0 to 35°C
Allowable ambient humidity 80% RH or less
2.2. Choosing the FTC unit installation location
• Do not install the FTC units outdoors as it is designed for indoor installation
only. (The FTC circuit board and casing are not waterproof.)
• Avoid locations where the unit is exposed to direct sunlight or other sources of
heat.
• Select a location where easy wiring access to the power source is available.
• Avoid locations where combustible gases may leak, be produced, ow, or ac-
cumulate.
• Select a level location that can bear the weight and vibration of the unit.
• Avoid locations where the unit is exposed to oil, steam, or sulfuric gas.
• Do not install in location that is hot or humid for long periods of time.
Optionalextras
• Wireless Remote Controller PAR-WT50R-E
• Wireless Receiver PAR-WR51R-E
• Remote sensor PAC-SE41TS-E
2. Installing the FTC unit
<Fig. 2.3.4>
<Fig. 2.3.2>
Service space
<Fig. 2.3.1>
Top
Bottom
Pull the cover to the
front and remove it.
Slide the control box cover
until the bottom of the cover
comes into contact with the
bottom of the control box.
Remove the 2 screws A
(control box cover screws). CoverBase
123
Top
Bottom Top Bottom
Front
Top
Wall
30 mm or more
Cover
Base
5-ELECT WIRE INLET
When installed on a wall: Lower side
2-ELECT WIRE INLET
When installed on a wall: Lower side
<Fig. 2.3.3>
C
C
C
B
A
D
<FTC (Master) unit> <FTC (Slave) unit>
C
C
C
CC
<Unit: mm>

5
3. System
The FTC (Master) is designed for use with a number of heat pump systems. Please refer to the following table to nd the relevant installation information for your system.
For multiple outdoor units control with FTC (Slave), see section 9.
3.1 First step (Electrical work)
Power supplies System diagram Reference
section
FTC (Master) powered via outdoor unit 4.1
4.2
FTC (Master) powered by independent
source
4.1
4.2
3.2 Second step (Outdoor unit type)
Outdoor unit type System diagram Thermistor Reference
section
Split TH2: Liquid refrigerant temp. 4.4
5.2
Packaged — 4.4
5.2
* PAC-IF062/063B-E is not available for Split-type system.
FTC (Master)
Main remote controller
Wireless Remote controller
(Option)
Wireless receiver
(Option)
Outdoor unit
Main remote controller
Outdoor unit
Wireless Remote controller
(Option)
Wireless receiver
(Option)
FTC (Master)
Outdoor unit TH2
Heat exchanger
Outdoor unit
Heat exchanger

6
3. System
3.3 Third step (Functions setting)
DHWtank Immersion
heater
Booster
heater
BH
function System diagram Thermistor Reference section Remarks
Present Absent Present For heating
and DHW
THW1: Flow water temp.
THW2: Return water temp.
THW5: Tank water temp.
4.4
4.5
5.3
Present Present Present For heating
and DHW
THW1: Flow water temp.
THW2: Return water temp.
THW5: Tank water temp.
4.4
4.5
5.3
Present Absent Present For heating
only
THW1: Flow water temp.
THW2: Return water temp.
THW5: Tank water temp.
4.4
4.5
5.3
1. ‘Legionella
Prevention
Mode’ cannot
be selected in
this system.
Present Absent Absent — THW1: Flow water temp.
THW2: Return water temp.
THW5: Tank water temp.
4.4
4.5
5.3
1. ‘Legionella
Prevention
Mode’ cannot
be selected in
this system.
2. Please make
sure water cir-
cuit not to get
frozen during
defrost.
Present Present Present For heating
only
THW1: Flow water temp.
THW2: Return water temp.
THW5: Tank water temp.
4.4
4.5
5.3
Present Present Absent — THW1: Flow water temp.
THW2: Return water temp.
THW5: Tank water temp.
4.4
4.5
5.3
Absent Absent Present — THW1: Flow water temp.
THW2: Return water temp.
4.4
4.5
5.3
Absent Absent Absent — THW1: Flow water temp.
THW2: Return water temp.
4.4
4.5
5.3
1. Please make
sure water cir-
cuit not to get
frozen during
defrost.
* The use of two 2-way valves can perform same function as a 3-way valve.
Booster heater Heat emitter
DHW tank
THW5
THW1
THW2
3-way valve (*)
Booster heater Heat emitter
DHW tank
THW5
THW1
THW2
Immersion heater
3-way valve (*)
Heat emitter
DHW tank
THW5
THW1
THW2
3-way valve (*)
Booster heater Heat emitter
THW1
THW2
Heat emitter
THW1
THW2
Heat emitter
DHW tank
THW5
THW1
THW2
Immersion heater
3-way valve (*)
Booster heater
Heat emitter
DHW tank
THW5
THW1
THW2
3-way valve (*)
Booster heater
Heat emitter
DHW tank
THW5
THW1
THW2
Immersion heater
3-way valve (*)

7
3. System
Parts name Requirement
Flow switch It is required to protect system from the effects of insufcient ow.
Flow sensor It is required to detect an error in ow rate.
(The operation is validated with GRUNDFOS VFS5-100.)
It is required for Energy monitor function.
Strainer /Magnetic lter
(water circuit)
Provide it as required to protect parts from damages caused by iron particles/water/contamination (e.g. the position before pump and return
part from emitters).
Pressure relief valve
(Primary circuit side)
(Sanitary water side)
It is required to protect system from reaching high pressure.
Select the operating pressure depending on water pressure in the circuit in normal use.
Note: Follow the national regulations.
3-way valve Current: 0.1A Max. (If over 0.1A you must use a relay)
Power supply: 230V AC
Connect earth cable, if there is one.
Type: SPST
Note: SPDT type can NOT be used.
2-way valve Current: 0.1A Max. (If over 0.1A you must use a relay)
Power supply: 230V AC
Connect earth cable, if there is one.
Type: Normally closed
Select the 2-way valve that slowly opens and shuts off to prevent water hammer.
A by-pass valve or circuit should be installed between pump and 2-way valve for safety (to release pressure when the both 2-way valves are closed).
Select a 2-way valve equipped with manual override, which is necessary for topping up or draining of water.
Water circulation pump Current: 1.0A Max., Power supply: 230V AC
When connecting a pump with an electric current of 1A or multiple pumps, please note the following.
1. Use (a) relay(s).
2. When power is supplied from outdoor unit, TOTAL current (including the other parts) requirement MUST be 3A. (otherwise, the fuse on
the outdoor unit PCB will blow. )
3. When independent power supplies (i.e. from the FTC unit itself) , total current for the pump(s) is 4A. (otherwise, the fuse on the FTC
PCB will blow. )
Connect earth cable, if there is one.
Adjust the pump speed setting so that the ow rate in the primary circuit is appropriate for the outdoor unit installed see the table and gures below.
Outdoor heat pump unit Waterowraterange[L/min]
Packaged model PUHZ-W50 6.5 - 14.3
PUHZ-W85 10.8 - 25.8
PUHZ-W112 14.4 - 32.1
PUHZ-HW112 14.4 - 32.1
PUHZ-HW140 17.9 - 40.1
Split model SUHZ-SW45 7.1 - 12.9
PUHZ-SW40 7.1 - 11.8
PUHZ-SW50 7.1 - 17.2
PUHZ-FRP71 11.5 - 22.9
PUHZ-SW75 9.5 - 22.9
PUHZ-SW100 13.0 - 32.1
PUHZ-SW120 17.9 - 45.9
PUHZ-SW160 23.0 - 63.1
PUHZ-SW200 28.7 - 71.7
PUHZ-SHW80 10.2 - 22.9
PUHZ-SHW112 14.4 - 32.1
PUHZ-SHW140 17.9 - 40.1
PUHZ-SHW230 28.7 - 65.9
* The water velocity in pipes should be kept within certain limits of material to avoid erosion corrosion and excessive noise generation.
(e.g. Copper pipe: 1.5m/s)
Continue to the next page.
3.4 Fourth step (Functions setting)
* Make sure to check the followings for your safety when designing a system. These are the minimum requirement for the safe use of FTC unit.
N L
4 5 6
3-way valve
SPST type
N L
4 5 6
3-way valve
motormotor
SPDT type
TBO. 2

8
3. System
Parts name Requirement
Water circulation pump
From the previous page.
(1) Packaged-type units
Heating
5.0 7.0 9.0 11.0 13.0 15.0 17.0 19.0
5.0
7.0
9.0
11.0
13.0
15.0
17.0
19.0
5.0
7.0
9.0
11.0
13.0
15.0
17.0
19.0
Water flow rate [L/min]
8.0 10.0 12.0
12.0 25.0 35.0 45.0 55.0 65.0 75.0 85.0 16.0 20.0 24.0 28.0 32.0 36.0 40.0 44.0 48.0
14.0 16.0 18.0 20.0 24.022.0
Water flow rate [L/min]
Water flow rate [L/min] Water flow rate [L/min]
Return water temp. [°C]
Return water temp. [°C]
5.0
7.0
9.0
11.0
13.0
15.0
17.0
19.0
Return water temp. [°C]Return water temp. [°C]
5.0
7.0
9.0
11.0
13.0
15.0
17.0
19.0
Return water temp. [°C]
PUHZ-SW40/50
*1
SUHZ-SW45 *1
PUHZ-SW75
*2
PUHZ-SHW80 *2
PUHZ-SW100/120 *3
PUHZ-SHW112/140 *3PUHZ-SHW230 *4
Available range
Water flow rate [L/min]
Available range
Available range Available range
PUHZ-SW160 *4
PUHZ-SW200 *4
25.0 35.0 45.0 55.0 65.0 75.0 85.0
5.0
7.0
9.0
11.0
13.0
15.0
17.0
19.0
Available range
(2) Split-type units
Heating
*1 When the connected plate heat exchanger is ACH 30-30 made by ALFA LAVAL.
*2 When the connected plate heat exchanger is ACH 70-30 made by ALFA LAVAL.
*3 When the connected plate heat exchanger is ACH 70-40 made by ALFA LAVAL.
*4 When two ACH 70-40 plate heat exchangers made by ALFA LAVAL are parallel-connected.
5.06.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0
7.0
9.0
11.0
13.0
15.0
17.0
19.0
Water flow rate [L/min]
10.0
14.0 19.0 24.0 29.0 34.0 39.0
12.0 14.0 16.0 18.0 20.0 22.0 24.0
Water flow rate [L/min]
Water flow rate [L/min]
Return water temp. [°C]
5.0
7.0
9.0
11.0
13.0
15.0
17.0
19.0
Return water temp. [°C]
5.0
7.0
9.0
11.0
13.0
15.0
17.0
19.0
21.0
23.0
25.0
Return water temp. [°C]
PUHZ-W50 PUHZ-W85
PUHZ-W112
PUHZ-HW112/140
Available range Available range
Available range

9
3. System
Parts name Requirement
Booster heater General * Consider necessity and capacity of booster heater to meet the following points.
(1) Heating capacity and ow water temperature should always be sufcient.
(2) System can increase the temperature of the stored water in tank to inhibit legionella bacterium growth.
(Note) System without neither booster heater or immersion heater, ‘Legionella Prevention Mode’ is NOT available.
(3) Water circuit should not be frozen during defrost operation.
Control Power for
Contactor
Current: 0.5A Max. , Power supply: 230V AC
* Use a relay.
Separate power
for Heater
Install an earth leakage circuit breaker (ECB) for heater, separate from control power (See Fig.1 and Fig.2).
* When using two booster heaters, booster heater 1 capacity must be less than that of booster heater 2.
When using a single booster heater, connect to BH1 (TBO.5 5-6 (OUT6)) , and turn the Dip SW2-3 to ON. (Booster heat-
er capacity restriction)
Heater capacity/Breaker/wiring (recommended)
<1 Phase> <3 Phase>
Description Power
supply
Total capacity
(BH1 + BH2)
Breaker Wiring
Booster heater
(Primary circuit)
~/N 230V
50Hz
2 kW (2 kW + 0 kW) 16 A 2.5 mm²
6 kW (2 kW + 4 kW) 32 A 6.0 mm²
* When installing a booster heater with the capacity of bigger than shown above, select an appropriate size breaker and
cable (diameter) based on the maximum possible electric current.
Safety device (1)
Use an overheat protection thermostat (manual reset type) (to detect unusual temperature increase/heating up without water).
Protection device operating temperature must be above 80°C. Protection device should not operate quickly, but water
circuit must not boil even when heater(s) overshoot.
(Reference value) Thermostat operation temperature used in our Cylinder unit and Hydrobox : 90°C ± 4°C
(2) Connect a pressure relief valve on the primary circuit side.
Immersion heater General * Consider necessity and capacity of immersion heater to meet the following points.
(1) Heating capacity and ow water temperature should always be sufcient.
(2) System can increase the temperature of the stored water in tank to inhibit legionella bacterium growth.
(Note) System without neither booster heater or immersion heater can not select ‘Legionella Prevention Mode’.
Control Power for
Contactor
Current: 0.5A Max. , Power supply: 230V AC
* Use a relay.
Separate power
for heater
Install an earth leakage circuit breaker (ECB) for heater, separate from control power (See Fig.1 and Fig.2).
*ECB is built-in in PAC-IF062/063B-E.
Heater capacity/Breaker/wiring (recommended)
Description Power supply Capacity Breaker Wiring
Immersion heater (DHW tank) ~/N 230V 50Hz 3 kW 16 A 2.5 mm²
* When installing an immersion heater with the capacity of bigger than shown above, select an appropriate size breaker
and cable (diameter) based on the maximum possible electric current.
Safety device (1) Install the thermistor THW5 (optional parts PAC-TH011TK-E(5 m) or PAC-TH011TKL-E(30 m)) on the DHW tank. Note
that PAC-IF063B-E comes with THW5. (Microcomputer detecting temperature for protection: 80°C)
(2) Use a built-in direct cut-off thermostat (manual reset type).
Protection device operating temperature must be above 80°C. Protection device should not operate quickly, but water
circuit must not boil even when a heater overshoots.
(Reference value) Thermostat operation temperature used in our Cylinder unit : 85°C ± 5°C
(3) Connect a pressure relief valve on the sanitary water side.
Mixing valve Current: 0.1 A Max. (If over 0.1 A you must use a relay)
Power supply: 230V AC
Connect earth cable, if there is one.
Type: Refer to the right gure.
Expansion Vessel (Primary circuit side)
Expansion Vessel (Sanitary water side)
When the water circuit is closed, select the expansion vessel according to water quantity of the water circuit.
* Follow the national regulations.
Limits of TOTAL electric current when con-
necting local supply parts
Option 1. (Power supply from outdoor unit)
TOTAL current requirement MUST be 3A. (otherwise, the fuse on the outdoor unit PCB will blow.)
Option 2. (Independent power supply (i.e. from the FTC unit itself))
TOTAL current of the pump(s) MUST be 4A.
The total current allowed for parts except pumps is 3A. (otherwise, the fuse on the FTC PCB will blow. )
<1 Phase>
Description Power
supply
Total capacity
(BH1 + BH2)
Breaker Wiring
Booster heater
(Primary circuit)
3~ 400V
50Hz 9 kW (3 kW + 6 kW) 16 A 2.5 mm²
Power
supply
~/N
230V
50Hz
Earth
leakage
circuit
breaker
Wiring
circuit
breaker
or
Isolating
switch
L
N
S1
S2
S3
Outdoor unit
S1
S2
S3
TB2
TB1
L
N
ECB
Wiring
circuit
breaker
or
Isolating
switch
Wiring
circuit
breaker
or
Isolating
switch
L
N
ECB
To control
board
ECB for
booster
heater
(Primary circuit)
ECB for
immersion
heater
(DHW tank)
Power
supply
Power
supply
FTC (Master)
L
N
Earth
leakage
breaker
Wiring
circuit
breaker
or
Isolating
switch
L1
L2
S1
S2
S3
Outdoor unit
S1
S2
S3
TB2
TB1
L2
L3
ECB
Wiring
circuit
circuit
breaker
or
Isolating
switch
Wiring
circuit
breaker
or
Isolating
switch
L
N
ECB
To control
board
ECB for
booster
heater
(Primary circuit)
ECB for
immersion
heater
(DHW tank)
FTC (Master)
N
L3
L1
L
N
Power
supply
3N~
400V
50Hz
Power
supply
Power
supply
<Fig. 1 (1 phase)> <Fig. 2 (3 phase)>
M
N
Mixing valve

10
1
3
7
5
2
4
6
8
9
10
11
1
12
1
5
4
3
6
2
13
14
15
2
13
14
15
7
5
4
3
61
8
9
10
11
12
1
2
3
5
6
4
Thermistor (THW6): Zone1 ow temp.
Thermistor (THW7): Zone1 return temp.
Thermistor (THW8): Zone2 ow temp.
Thermistor (THW9): Zone2 return temp.
THW6
THW7
THW8
THW9
Mixing tank
Motorized
mixing valve
Water circulation pump 2
(Zone1)
Flow switch 2 (Zone1)
Water circulation pump 3
(Zone2)
Flow switch 3 (Zone2)
Heat emitters (Zone1)
Heat emitters (Zone2)
16
18
Zone1
Zone2
17
12
1
1-zone temperature control
2-zone temperature control
1-zone temperature control with boiler 2-zone temperature control with boiler
1. Zone1 heat emitters (e.g. radiator, fan coil unit) (local supply)
2. Mixing tank (local supply)
3. Zone1 ow water temp. thermistor (THW6) (option)
4. Zone1 return water temp. thermistor (THW7) (option)
5. Zone1 water circulation pump (local supply)
6. Zone1 ow switch (local supply)
7. Motorized mixing valve (local supply)
8. Zone2 ow water temp. thermistor (THW8) (option)
9. Zone2 return water temp. thermistor (THW9) (option)
3.5 Local system
Zone1 Zone1
Zone1
Zone2
Zone1 Zone1
Zone2
Note:Coolingmodecannotrununder2-zonetemperaturecontrolbutcanrunbothinZone1andZone2under1-zonetemperaturecontrol.
3. System
10. Zone2 water circulation pump (local supply)
11. Zone2 ow switch (local supply)
12. Zone2 heat emitters (e.g. underoor heating) (local supply)
13. Boiler ow water temp. thermistor (THWB1) (option)
14. Boiler return water temp. thermistor (THWB2) (option)
15. Boiler (local supply)
16. Zone1 2-way valve (local supply)
17. Zone2 2-way valve (local supply)
18. Bypass valve (local supply)
1-zonetemperaturecontrol(2-zonevalveON/OFFcontrol)
3.6 Piping diagram for 2-zone temperature control
The following component parts are required for piping for 2-zone control operation.
Arrange the following component parts.
•Mixing tank (local supply)
•Motorized mixing valve (local supply)
•Water circulation pump (× 2) (local supply)
•Flow switch (× 2) (local supply)
•Thermistor (× 4) (2 sets of PAC-TH011-E) thersmistors are required.
Wire the component parts to the water circuit referring to the gure below.
For more details on wiring, refer to “4.7 Wiring for 2-zone temperature controls”.
Note:
Donotinstallthethermistorsonthemixingtank.Thiscouldaffect
correctmonitoringofowandreturntemperaturesthrougheachzone.
InstalltheZone2owtemp.thermistor(THW8)nearthemixingvalve.

11
3.7 Energy monitor *3
End user can monitor accumulated*1 ‘Consumed electric energy’ and ‘Delivered heat energy’ in each operation mode*2 on the main remote controller.
*1 Monthly and Year to date
*2 - DHW operation
- Space heating
- Space cooling
*3 Not available during Multiple outdoor unit control.
Refer to “7.2 Main remote controller” for how to check the energy, and “5.1 DIP switch functions” for the details on DIP-SW setting.
Either one of the following two method is used for monitoring.
Note: The method 1 should be used as a guide. If a certain accuracy is required, the method 2 should be used.
1. Calculation internally
Electricity consumption is calculated internally based on the energy consumption of outdoor unit, electric heater, water pump(s) and other auxiliaries.
Delivered heat is calculated internally by multiplying delta T (Flow and Return temp.) and flow rate measured by the locally supplied sensors.
Set the electric heater capacity and water pump(s) input according to indoor unit model and specs of additional pump(s) supplied locally. (Refer to the menu tree in “7.2
Main remote controller”)
Booster heater1 Booster heater2 Immersion
heater Pump1 Pump2 Pump3
2kW*1 4kW*1 0kW*1
*** *1 0W*1 0W*1
<Table 3.7>
*1 Be sure to change the setting corresponding to the specication of locally supplied auxiliaries such as electric heater and pump.
When anti-freeze solution (propylene glycol) is used for primary water circuit, set the delivered energy adjustment if necessary.
For further detail of above, refer to “7.2 Main remote controller”.
2. Actual measurement by external meter (locally supplied)
FTC has external input terminals for 2 ‘Electric energy meters’ and a ‘Heat meter’.
If two ‘Electric energy meters’ are connected, the 2 recorded values will be combined at the FTC and shown on the main remote controller.
(e.g. Meter 1 for H/P power line, Meter 2 for heater power line)
Refer to the [Signal inputs] section in “4.5 Connecting inputs/outputs” for more information on connectable electric energy meter and heat meter.
3. System

12
Power
supply
~/N
230V
50Hz
Earth
leakage
circuit
breaker
Wiring
circuit
breaker
or
Isolating
switch
L
N
S1
S2
S3
Outdoor unit
S1
S2
S3
TB2
TB1
L
N
ECB
: PAC-IF061B-E
: PAC-IF062/063B-E
Wiring
circuit
breaker
or
Isolating
switch
To control
board
ELB for
immersion
heater
(DHW tank)
Power
*1
*1
supply
FTC (Master)
L
N
Power
supply
3N~
400V
50Hz
Earth
leakage
circuit
breaker
Wiring
circuit
breaker
or
Isolating
switch
L3
L2
L1
N
S1
S2
S3
Outdoor unit
S1
S2
S3
TB2
TB1
L
N
ECB
Wiring
circuit
breaker
or
Isolating
switch
To control
board
ELB for
immersion
heater
(DHW tank)
Power
supply
FTC (Master)
L
N
4. Electrical work
4.1 Electrical connection
All electrical work should be carried out by a suitably qualied technician. Failure
to comply with this could lead to electrocution, re, and death. It will also invali-
date product warranty. All wiring should be according to national wiring regula-
tions.
For multiple outdoor units control with FTC (Slave), see section 9.
FTC (Master) can be powered in two ways.
1. Power cable is run from the outdoor unit to FTC (Master).
2. FTC (Master) has independent power source.
Connections should be made to the terminals indicated in the following gures
depending on the phase.
Option 1: FTC (Master) powered via outdoor unit
<Fig. 4.1.2>
Electrical connections 1 phase/3 phase
Wiring
Wiring No.
× size
(mm²)
FTC (Master) - Outdoor unit *2 3 × 1.5 (polar)
FTC (Master) - Outdoor unit earth *2 1 × Min. 1.5
Circuit
rating
FTC (Master) - Outdoor unit S1 - S2 *3 230V AC
FTC (Master) - Outdoor unit S2 - S3 *3 24V DC
*2. Max. 45 m
If 2.5 mm² used, Max. 50 m
If 2.5 mm² used and S3 separated, Max. 80 m
*3. The values given in the table above are not always measured against the ground value.
Notes: 1. Wiring size must comply with the applicable local and national codes.
2.FTC(Master)/outdoorunitconnectingcordsshallnotbelighterthanpolychloroprenesheathedexiblecord.(Design60245IEC57)
FTC(Master)powersupplycordsshallnotbelighterthanpolychloroprenesheathedexiblecord.(Design60227IEC53)
3. Install an earth longer than other cables.
4.Pleasekeepenoughoutputcapacityofpowersupplyforeachindividualheater.Insufcientpowersupplycapacitymightcausechattering.
*1 If the installed earth leakage circuit breaker does not have an over-current protection function, install a breaker with that function along the same power line.
A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.
Note:InaccordancewithIEEregulationsthecircuitbreaker/isolatingswitchlocatedontheoutdoorunitshouldbeinstalledwithlockabledevices(healthandsafety).
<Fig.4.1.1>WiringforPAC-IF062/063B-E
TB2
Clamps
Slot
TB1
Breaker abbreviation Meaning
ECB Earth leakage circuit breaker for immersion heater
TB1 Terminal bed 1
TB2 Terminal bed 2
Immersion heater should be connected independently from one another to dedi-
cated power supplies.
Clamp
Clamps
1 2 3 4 5
1High voltage cables (OUTPUT)
2High voltage cables (OUTPUT)
3Low voltage cables (INPUT) and wireless receiver’s cable
4Thermistor cables
5Power cables
Notes:1.Donotrunthelowvoltagecablesthroughaslotthatthehighvolt-
age cables go through.
2.Donotrunothercablesexceptlowvoltagecablesthroughaslot
that the wireless receiver’s cable goes through.
3.Donotbundlepowercablestogetherwithothercables.
4.Bundlecablesasgureabovebyusingclamps.
Clamps
<1 phase> <3 phase>

13
S1
S2
S3
L
N
L
N
BLACK BLACK
YELLOW YELLOW YELLOW
YELLOW
BLACK
BLACK
CNO1
CNO1
CNO1
White
CNO1
White
FTC
(Master)
FTC
(Master)
S1
S2
S3
Initial settings
(Power supplied
by outdoor unit)
Modified settings
(Separate power
supply to
FTC(Master))
Power
supply
~/N
230V
50Hz
Earth
leakage
breaker
*1 *1
*1
*1
Wiring
circuit
breaker
or
Isolating
switch
L
N
S1
S2
S3
Outdoor unit
S1
S2
S3
TB2
TB1
L
N
ECB
Wiring
circuit
breaker
or
Isolating
switch
To control
board
ELB for
immersion
heater
(DHW tank)
L
N
Power
supply
~/N
230V
50Hz
Earth
leakage
breaker
Wiring
circuit
breaker
or
Isolating
switch
Power
supply
circuit
circuit
: PAC-IF061B-E
: PAC-IF062/063B-E
FTC (Master)
Power
supply
3N~
400V
50Hz
Earth
leakage
breaker
Wiring
circuit
breaker
or
Isolating
switch
L3
L2
L1
N
S1
S2
S3
Outdoor unit
S1
S2
S3
TB2
TB1
L
N
ECB
Wiring
circuit
breaker
or
Isolating
switch
To control
board
ELB for
immersion
heater
(DHW tank)
L
N
Power
supply
~/N
230V
50Hz
Earth
leakage
breaker
Wiring
circuit
breaker
or
Isolating
switch
Power
supply
circuit
circuit
FTC (Master)
4. Electrical work
Option 2: FTC (Master) powered by independent source
If FTC (Master) and outdoor units have separate power supplies, the following
requirements MUST be carried out:
•FTC(Master) unit electrical box connector connections changed.(see
Fig. 4.1.3)
•OutdoorunitDIPswitchsettingschangedtoSW8-3ON.
•TurnontheoutdoorunitbeforetheFTC(Master).
•Powerby independent source is not available forparticularmodelsof
outdoor unit model.
For more detail, refer to the connecting outdoor unit installation manual.
<Fig. 4.1.3>
<Fig. 4.1.5>
Electrical connections 1 phase/3 phase
FTC (Master) power supply ~/N 230 V 50 Hz
FTC (Master) input capacity
Main switch (Breaker)
*1 16 A
Wiring
Wiring No.
× size (mm²)
FTC (Master) power supply 2 × Min. 1.5
FTC (Master) power supply earth 1 × Min. 1.5
FTC (Master) - Outdoor unit *2 2 × Min. 0.3
FTC (Master) - Outdoor unit earth —
Circuit
rating
FTC (Master) L - N *3 230V AC
FTC (Master) - Outdoor unit S1 - S2 *3 —
FTC (Master) - Outdoor unit S2 - S3 *3 24V DC
*2. Max. 120 m
*3. The values given in the table above are not always measured against the
ground value.
Notes: 1. Wiring size must comply with the applicable local and national codes.
2. FTC(Master)unit/outdoorunitconnectingcordsshallnotbelighter
thanpolychloroprenesheathedexiblecord.(Design60245IEC57)
FTC (Master) unit power supply cords shall not be lighter than
polychloroprenesheathedexiblecord.(Design60227IEC53)
3. Install an earth longer than other cables.
4.
Please keep enough output capacity of power supply for each individual
heater.Insufcientpowersupplycapacitymightcausechattering.
TB2
Clamps
Slot
TB1
Clamps
1 2 3 4 5
Notes:1.Donotrunthelowvoltagecablesthroughaslotthatthehighvoltagecablesgothrough.
2.Donotrunothercablesexceptlowvoltagecablesthroughaslotthatthewirelessreceiver’scablegoesthrough.
3.Donotbundlepowercablestogetherwithothercables.
4.Bundlecablesasgureabovebyusingclamps.
*1 If the installed earth leakage circuit breaker does not have an over-current protection function, install a breaker with that function along the same power line.
A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.
Note:InaccordancewithIEEregulationsthecircuitbreaker/isolatingswitchlocatedontheoutdoorunitshouldbeinstalledwithlockabledevices(healthandsafety).
<Fig.4.1.4>WiringforPAC-IF062/063B-E
1High voltage cables (OUTPUT)
2High voltage cables (OUTPUT)
3Low voltage cables (INPUT) and
wireless receiver’s cable
4Thermistor cables
5Power cables
Clamps
Clamps
<3 phase><1 phase>

14
30
30
30
120
46
83.5
Wall
Bushing
Conduit tube
Locknut
Switch box
Seal the gap with putty.
Main controller cable
Front cover and top case Bottom case
10mm
6mm
Sheath
Front Back
Thread the cable.
Thread the sheath part
of the cable to the front. 2-core wire must not
be seen on the back.
Connect the cabe.
(non-polarized)
Connect the cable so that the
cable sheath is not pinched.
Remote controller cable
Seal the gap with putty.
Route the cable from behind
the remote controller.
4. Electrical work
4.2 Connecting the main remote controller
4.2.1 Connect the main remote controller cable to FTC (Master)
Connect the main remote controller cable to 1 and 2 on the terminal block (TBI. 2)
on the FTC (Master) controller. <Fig. 4.2.1>
Wiring wire No. × size (mm²): 2 × 0.3 (non polar)
The 10 m wire is attached as an accessory. Max. 500 m
Wiring size must comply with the applicable local and national codes.
Circuit rating: 12V DC
Circuit rating is NOT always against the ground.
Location to place the main remote controller
When using the Remote controller options (refer to section 4.3), place the main
remote controller on appropriate location that meets the following points to detect
room temperature.
• Do not place the main remote controller in the periphery of a door or a window.
• Do not place the main remote controller near heat or cold sources, such as a ra-
diator or the like.
Notes:
Wiring for main remote controller cable shall be (5 cm or more) apart from
powersourcewiringsothatitisnotinuencedbyelectricnoisefrompower
sourcewiring.(Donotinsertmainremotecontrollercableandpowersource
wiring in the same conduit.) (Refer to Fig. 4.1.1)
When wiring to TBI.2, use the ring type terminals and insulate them from the
cables of adjoining terminals.
<Fig. 4.2.1>
4.2.2 Installing the main remote controller
1. The main remote controller can be installed either in the switch box or directly on
the wall. Perform the installation properly according to the method.
(1) Secure clearances shown in <Fig. 4.2.2> regardless of whether installing
the main remote controller either directly on the wall or in the switch box.
(2) Prepare the following items in the eld.
Double switch box
Thin metal conduit
Locknut and bushing
Cable cover
Wall plug
2. Drill an installation hole in the wall.
■ Installation using a switch box
•
Drill a hole in the wall for the switch box, and install the switch box in the hole.
• Fit the conduit tube into the switch box.
■ Direct wall installation
•
Drill a cable access hole and thread the main remote controller cable through it.
Caution:
To prevent entry of dew, water, and insects, seal the gap between the cable
and the hole through which the cable is threaded with putty. Otherwise, elec-
tricshock,re,orfailuremayresult.
3. Have the main remote controller ready.
Remove the bottom case from the main remote controller.
4.
Connect the main remote controller cable to the terminal block on the bottom case.
Modify the main remote controller cable as shown in <Fig. 4.2.5>, and thread
the cable from behind the bottom case.
Completely thread the cable to the front so that the unsheathed part of the cable
cannot be seen behind the bottom case.
Connect the main remote controller cable to the terminal block on the bottom
case.
■ Direct wall installation
• Seal the gap between the cable and the hole through which the cable is
threaded.
Caution
To prevent electric shock or failure, keep the sheath ends or any other
foreign objects out of the terminal block.
Donotuseringterminalstoconnectthewirestotheterminalblockonthe
bottom case. The terminals will come in contact with the control board and
the front cover, which will result in failure.
<Fig. 4.2.2>
<Fig. 4.2.3>
<Fig. 4.2.4>
<Fig. 4.2.5>
Required clearances
surrounding the main
remote controller
Main remote
controller prole
Installation pitch
TBI.2 RC
<Unit: mm>

15
Clamps
Hold the wires in place
with clamps.
Main remote controller cable
See Step 4.
Wood
screw
Thread the cable through the slot.
Completely seal the gap around
the cable access hole.
See Step 2.
Main remote controller cable
See Step 4.
Double switch box
Roundhead cross
slot screws
4. Electrical work
5. Install the bottom case.
■ Installation using a switch box
• When installing the bottom case in the switch box, secure at least two
corners of the switch box with screws.
<Fig. 4.2.6>
■ Direct wall installation
• Thread the cable through the slot provided.
• When mounting the bottom case on the wall, secure at least two corners of
the main remote controller with screws.
• To prevent the bottom case from lifting, use top-left bottom-right corners
of the main remote controller (viewed from the front) to secure the bottom
case to the wall with wall plugs or the like.
Caution:
To avoid causing deformation or cracks to the main remote controller, do
not overtighten the screws and make an additional installation hole(s).
6. Cut out the cable access hole.
■ Direct wall installation
• Cut out the knockout hole (indicated with grey in <Fig. 4.2.7>) in the front
cover by knife or nipper.
• Thread the main remote controller cable from the slot behind the bottom
case through this access hole.
7. Plug the lead wire cable into the top case.
Plug the lead wire cable coming from the bottom case into the top case.
Caution:
To avoid failures, do not remove the controller board protective sheet and
the controller board from the top case.
After the cable is plugged into the top case, do not hang the top case as
shown in <Fig. 4.2.8>. Otherwise, the main remote controller cable could
sever, which could cause malfunction to the main remote controller.
8. Fit the lead wires into the clamps.
Caution:
Holdthewiresinplacewithclampstopreventexcessivestrainfrombeing
applied on the terminal block and causing cable breakage.
<Fig. 4.2.7>
<Fig. 4.2.8>
<Fig. 4.2.9>
Securely plug the connector
into the jack.

16
Seal the gap between the cable
and the access hole with putty. Use a cable cover.
Thread the main remote controller cable through the cable
access hole at the top of the main remote controller.
Check that the cover is
securely installed and not
lifted.
4. Electrical work
9. Fit the top case and the front cover onto the bottom case.
The top case assembly (tted with the front cover at factory shipment) has
two tabs on top. Hook the tabs onto the bottom case and snap the top case
onto the bottom case into place. Check that the cover is securely installed.
Caution:
When the top case is correctly attached to the bottom case a click is heard.
If the front cover is not clicked into place it may fall off.
■ Direct wall installation (when routing the main remote controller cable along
the wall surface)
• Thread the main remote controller cable through the cable access hole at
the top of the main remote controller.
• Seal the gap between the cable and the access hole with putty.
• Use a cable cover.
■ Disassembling the top case and the front cover
(1) Remove the front cover.
Insert a at head screwdriver into either of two open slots at the bottom of
the main remote controller and move the screwdriver handle downward as
shown. The engagement of the tabs will be released. Then pull the front-
cover toward the front to remove the front cover.
(2) Remove the top case.
Insert a at head screwdriver into either of two open slots at the bottom of
the main remote controller. The subsequent procedure is the same as that
of the front cover.
Caution:
Usea5 mm- flat headscrewdriver.Donotturn the screwdriver forcibly
whileplacingthebladeintheslots.Doingsocouldbreakthecovers.
<Fig. 4.2.10>
<Fig. 4.2.11>
<Fig. 4.2.12>

17
4.3 Main Remote Controller Options
The FTC (cased) comes factory tted with a main remote controller. This incorporates a
thermistor for temperature monitoring and a graphical user interface to enable set-up, view
current status and input scheduling functions. The main remote controller is also used for
servicing purposes. This facility is accessed via password protected service menus.
To provide the best efciency Mitsubishi Electric recommends using automatic adaptation
function based on room temperature. To use this function a room thermistor needs to be
present in a main living area. This can be done in a number of ways the most convenient
are detailed below.
Refer to heating section of this manual for instructions on how to set compensation
curve,owtemp.orroomtemp.(Autoadaptation).
For instructions on how to set the thermistor input for the FTC (Master) please refer
to Initial settings section.
The factory setting for space heating mode is set to Room temp. (auto adaptation). If
there is no room sensor present in the system, this setting must be changed to either
Compensation curve mode or Flow temp. mode.
Note: Auto-adaptation is not available in Cooling mode.
FTC
(Master)
FTC
(Master)
FTC
(Master)
20.0°C
FTC
(Master)
20.0°C
20.0°C
20.0°C
20.0°C
FTC
(Master)
4. Electrical work
1-zone temperature control
Control option A
This option features the main remote controller and the Mitsubishi Electric wireless
remote controller. The wireless remote controller is used to monitor room temperature
and can be used to make changes to the space heating settings, boost DHW (*1) and
switch to holiday mode without having to directly use the main remote controller.
If more than one wireless remote controller is used, the most recently requested
temperature setting will commonly be applied to all rooms by the central control system
regardless of which wireless remote controller was used. No hierarchy exists across
these remote controllers.
Wire the wireless receiver to FTC (Master) referring to the wireless remote controller
instruction manual. TurnDIPSW1-8toON. Before operation congure the wireless
remote controller to transmit and receive data referring to the wireless remote
controller installation manual.
Control option B
This option features the main remote controller and the Mitsubishi Electric thermistor
wired to FTC (Master). The thermistor is used to monitor room temperature but can not
make any changes in control operation. Any changes to DHW (*1) must be made using
the main remote controller mounted on the FTC (Master).
Wire the thermistor to the TH1 connector on FTC (Master).
The number of room temperature thermistors that can be connected to FTC (Master) is
always one.
Control option C
This option features the main remote controller being removed from the FTC (Master)
and situated in a different room. A thermistor built in the main remote controller can be
used for monitoring the room temperature for Auto Adaptation function whilst keeping all
its features of the main remote controller available.
The main remote controller and FTC (Master) are connected by a 2-core, 0.3 mm², non-
polar cable (local supply) with a maximum length of 500 m.
To use the sensor in the main remote controller, the main remote controller should come
off from the FTC (Master). Otherwise it will detect the temperature of the FTC (Master)
instead of room temperature. This will affect the output of the space heating.
ControloptionD(Flowtemp.orcompensationcurveonly)
This option features the main remote controller and a locally supplied thermostat wired
to FTC (Master). The thermostat is used to set the maximum temperature for heating
room. Any changes to DHW (*1) must be made using main remote controller mounted
on the FTC (Master).
The thermostat is wired to IN1 in TBI.1 on FTC (Master). The number of thermostats that
can be connected to FTC (Master) is always one.
The wireless remote controller can be also used as a thermostat.
*1 If applicable
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
Wireless receiver
(option) Wireless remote controller
(option)
Main remote controller
(remote position)
Max. 8
Room
Room
Room temperature
thermistor (option)
Room
Room
Room temperature
thermostat
(local supply)
Factory supplied standard
Outdoor unit
Main remote controller
Main remote controller
Main remote controller
Main remote controller

18
2-zone temperature control
Control option A
This option features the main remote controller, the Mitsubishi Electric wireless remote
controller and a locally supplied thermostat.
The wireless remote controller is used to monitor the Zone1 room temperature and the
thermostat is used to monitor the Zone2 room temperature.
The thermostat can be also allocated to Zone1 and the wireless remote controller to
Zone2.
The wireless remote controller can be also used to make changes to the space heating
settings, boost DHW (*1) and switch to holiday mode without having to use the main
remote controller.
If more than one wireless remote controller is used, the last temperature setting
adjustment/demand will be applied to ALL rooms in same zone.
Wire the wireless receiver to FTC (Master) referring to the wireless remote controller
instruction manual. Turn DIP SW1-8 to ON. Before operation congure the wireless
remote controller to transmit and receive data referring to the wireless remote control-
ler installation manual.
The thermostat is used to set the maximum temperature for heating Zone2 room.
The thermostat is wired to IN6 on FTC (Master). (If the thermostat is allocated to
Zone1, it is wired to IN1 on TBI.1.) (Refer to 4.5.)
Control option B
This option features the main remote controller, the Mitsubishi Electric thermistor and a
locally supplied thermostat that are wired to FTC (Master).
The thermistor is used to monitor the Zone1 room temperature and the thermostat is
used to control the Zone2 room temperature.
The thermostat can be also allocated to Zone1 and the thermistor to Zone2.
The thermistor can not make any changes in control operation. Any changes to DHW
(*1) must be made using the main remote controller mounted on the FTC (Master).
Wire the thermistor to the TH1 connector on FTC (Master).
The number of room temperature thermistors that can be connected to FTC (Master) is
always one.
The thermostat is used to set the maximum temperature for heating Zone2 room.
The thermostat is wired to IN6 on FTC (Master). (If the thermostat is allocated to Zone1,
wire it to IN1 on TBI.1.) (Refer to 4.5.)
Control option C
This option features the main remote controller (with in-built thermistor) that is removed
from the FTC (Master) to monitor the Zone1 room temperature and a locally supplied
thermostat to monitor the Zone2 room temperature.
The thermostat can be also allocated to Zone1 and the thermistor to Zone2.
A thermistor built into the main remote controller can be used for monitoring the room
temperature for Auto Adaptation function whilst keeping all its features of the main re-
mote controller available.
The main remote controller and FTC (Master) are connected by a 2-core, 0.3 mm²,
non-polar cable (local supply) with a maximum length of 500 m.
To use the sensor in the main remote controller, the main remote controller should be
detached from the FTC (Master). Otherwise it will detect the temperature of the FTC
(Master) instead of room temperature. This will affect the output of the space heating.
The thermostat is used to set the maximum temperature for heating Zone2 room.
The thermostat is wired to IN6 on FTC (Master). (If the thermostat is allocated to
Zone1, wire it to IN1 on TBI.1.) (Refer to 4.5.)
ControloptionD
This option features the locally supplied thermostats wired to FTC (Master). The ther-
mostats are individually allocated to Zone1 and Zone2. The thermostats are used to
set each maximum temperature for heating Zone1 and Zone2 rooms. Any changes to
DHW (*1) must be made using the main remote controller mounted on the FTC (Master).
The thermostat for Zone1 is wired to IN1 in TBI.1 on FTC (Master).
The thermostat for Zone2 is wired to IN6 in TBI.1 on FTC (Master).
Note: For the options above, the sensor types can be exchanged between Zone1 and Zone2.
(e.g. Wireless remote controller in Zone1 and Room temp. thermostat in Zone2 can be changed to Room temp. thermostat and wireless remote controller, respectively).
*1 If applicable
The wireless remote controller can be also used as a thermostat.
FTC
(Master)
20.0°C
FTC
(Master)
20.0°C
FTC
(Master)
20.0°C
20.0°C
20.0°C
FTC
(Master)
20.0°C
4. Electrical work
Room temperature
thermistor (option)
Room temperature
thermostat
(local supply)
Main remote controller
Outdoor unit
Zone1: Room temp. control (Auto adaptation)
Zone2: Compensation curve or ow temp. control
Zone1
Zone2
Main remote controller
(remote position)
Room temperature
thermostat
(local supply)
Zone1: Room temp. control (Auto adaptation)
Zone2: Compensation curve or ow temp. control
Zone2
Zone1
Outdoor unit
Room temperature
thermostat
(local supply)
Wireless receiver
(option) Wireless remote controller
(option)
Outdoor unit
Zone1
Zone2
Max. 8
Zone1: Room temp. control (Auto adaptation)
Zone2: Compensation curve or ow temp. control
Outdoor unit
Room temperature
thermostat
(local supply)
Room temperature
thermostat
(local supply)
Zone2
Zone1
Zone1, Zone2: Compensation curve or ow temp. control
Main remote controller
Main remote controller

19
4.4. Connecting the thermistor cables
Connect the thermistor for the FTC (Master) controller.
For multiple outdoor units control with FTC (Slave), see section 9.
4.4.1Connectingtheroomtemp.thermistor(TH1)cable
TH1 is an optional part (PAC-SE41TS-E).
TH1 is required to use the auto adaptation function. However, when room tempera-
ture detection is conducted by the main remote controller or the wireless remote
controller (optional), this part is not required.
Connect the TH1 cable to the CN20 connector on FTC (Master).
When the TH1 cable is too long, bundle the excess cable outside the FTC (Master) unit.
For more details, refer to Section 4.3 in this manual or the installation manual that
comes with PAC-SE41TS-E.
When using TH1, place this sensor on appropriate location to detect room temperature.
4.4.2.Connectingtherefrigerantpipetemp.thermistor(TH2)cable
Connect the TH2 cable to the CN21 connector on FTC (Master).
For split Outdoor unit : Connect TH2.
For packaged Outdoor unit : It is NOT necessary to connect TH2.
When the TH2 cable is too long, bundle the excess cable outside the FTC (Master) unit.
Do not bind the wires in the FTC (Master) unit.
<Thermistor position>
Place TH2 on refrigerant piping ( liquid side).
It is recommended to protect the thermistor with heat insulating materials so as not
to be affected by ambient temperature.
Note: Be sure to place TH2 where it correctly detects refrigerant piping temp. (liquid side).
Because;
(1) TH2 is required to detect heating subcool correctly.
(2) Refrigerant temperature of water-to-refrigerant heat exchanger also needs
to be detected for protection purpose.
4.4.3. Connectingtheowwatertemp.thermistor(THW1)cable
andthereturnwatertemp.thermistor(THW2)cable
The THW1 and the THW2 cables share a connector, and the connector connects to
CNW12 connector on FTC (Master).
When the THW1 and THW2 cables are too long, bundle the excess cables outside the FTC (Master) unit.
Do not bind the wires in the FTC (Master) unit.
<Thermistor position>
Place THW1 on water piping (water outlet side) after booster heater, and THW2 on the water inlet side.
It is recommended to protect the thermistor with heat insulating materials so as not to be affected by ambient temperature.
Note: Be sure to attach THW1 where it correctly detects Flow temp. (water oulet side). Fore more details, see Page 6.
4.4.4.ConnectingtheactualDHWtankthermistor(THW5)cable
THW5 is an optional part (PAC-TH011TK-E(5 m) or PAC-TH011TKL-E(30 m)). However, PAC-IF063B-E comes with THW5.
Connect the THW5 cable to the CNW5 connector on FTC (Master) if the DHW tank is available.
When the THW5 cable supplied with FTC (Master) is too long, bundle the excess cable outside the FTC (Master) unit.
Do not bind the wires in the FTC (Master) unit.
<Thermistor position>
Place THW5 on the position where tank water temperature can be detected correctly.
It is recommended to position the thermistor at the mid height of the DHW tank (to control DHW heating with this sensor).
It is recommended to protect the thermistor with heat insulating materials so as not to be affected by ambient temperature.
Especially for double (insulated) tank, thermistor should be attached to the inner side (to detect the water temperature).
Note:
Connect the terminals by using the ring terminals and also insulate the cables of adjoining terminals when wiring to TBI.1-3.
Thenecessarythermistor(THW6,THW7,THW8,THW9)connectionfor2-zonetemperaturecontrol,referto“4.7 Wiring for 2-zone temperature control” .
Thenecessarythermistor(THWB1,THWB2,THW6,THW7)connectionforback-upoperationofboiler,refertotheinstallationmanualofPAC-TH011HT-E.
Caution:
Donotroutethethermistorcablestogetherwithpowercables.
The sensor part of the thermistor should be installed where user can not access.
4. Electrical work
<Fig. 4.4.1>
THWB2
THWB1
THW9
THW6
THW7
THW8
CN20
CN21
CNW12
CNW5

20
*1
PACKAGED type outdoor unit without DHW tank and booster heater
PACKAGED type outdoor unit with DHW tank and booster heater
DHW tank
temperature
THW5
Water OUTLET side
after booster heater
Outdoor unit
*1
Water piping TH2
PACKAGED type
(with a refrigerant-water HEX inside)
*1 Refrigerant-water HEX
THW2
THW1
Not necessary
Water INLET side
PACKAGED type outdoor unit with DHW tank
Outdoor unit
TH2
*1 Refrigerant-water HEX
THW2
THW5
THW1
DHW tank
temperature
Water OUTLET side
Water piping
PACKAGED type
(with a refrigerant-water HEX inside)
Water INLET side
Not necessary
Outdoor unit
*1
TH2
*1 Refrigerant-water HEX
THW2
THW1
THW5
PACKAGED type outdoor unit with booster heater
Water OUTLET side
after booster heater
Water piping
PACKAGED type
(with a refrigerant-water HEX inside)
Not necessary
Water INLET side
Not necessary
Outdoor unit
TH2
THW2
THW1
THW5
*1
*1 Refrigerant-water HEX
Water piping
PACKAGED type
(with a refrigerant-water HEX inside)
Not necessary
Water INLET side
Not necessary
Refrigerant
Refrigerant LIQUID side
SPLIT type outdoor unit with DHW tank and booster heater
piping
SPLIT type
(without a refrigerant-water HEX inside) *1 Refrigerant-water HEX
DHW tank
temperature
Water OUTLET side
after booster heater
Water piping
Water INLET side
THW1
TH2
THW5
THW2
*1
FTC
(Master)
FTC
(Master)
FTC
(Master)
FTC
(Master)
FTC
(Master)
FTC
(Master)
FTC
(Master)
FTC
(Master)
Outdoor unit
SPLIT type outdoor unit with DHW tank
THW1
TH2
THW5
THW2
*1
Refrigerant
Refrigerant LIQUID side
piping
SPLIT type
(without a refrigerant-water HEX inside) *1 Refrigerant-water HEX
DHW tank
temperature
Water OUTLET
Water piping
Water INLET side
Outdoor unit
SPLIT type outdoor unit with booster heater
THW1
TH2
THW2
THW5
Not necessary
*1
Refrigerant
Refrigerant LIQUID side
piping
SPLIT type
(without a refrigerant-water HEX inside) *1 Refrigerant-water HEX
Water OUTLET
after booster heater
Water piping
Water INLET side
Outdoor unit
SPLIT type outdoor unit without DHW tank and booster heater
THW1
TH2
THW2
THW5
Not necessary
Refrigerant
Refrigerant LIQUID side
piping
SPLIT type
(without a refrigerant-water HEX inside) *1 Refrigerant-water HEX
Water piping
Water INLET side
Outdoor unit
*1
side
Water OUTLET side Water OUTLET side
4. Electrical work
Outdoor unit type DHWtank TH2 THW1 THW2 THW5
Split Present
Absent —
Packaged Present —
Absent — —
: Necessary. Connect the thermistor.
—: Not necessary. The thermistor is not required, do not connect.
4.4.5. Thermistor position and necessity
<Thermistor position and necessity>
<Fig. 4.4.2>