Mitsubishi Electric PAC-IF021B-E User manual

Flow temp. controller
C-1
1Installation..............................................................C-2
FTC(PAC-IF021B-E) .............................................................. C-2
FTC2(PAC-IF031B-E) ............................................................ C-3
2System ....................................................................C-4
FTC(PAC-IF021B-E) .............................................................. C-4
FTC2(PAC-IF031B-E) ............................................................ C-6
3Electrical work .......................................................C-9
FTC(PAC-IF021B-E) .............................................................. C-9
FTC2(PAC-IF031B-E) .......................................................... C-14
4Switch setting ......................................................C-19
FTC(PAC-IF021B-E) ............................................................ C-19
FTC2(PAC-IF031B-E) .......................................................... C-21
5Before test run .....................................................C-30
FTC(PAC-IF021B-E) ............................................................ C-30
FTC2(PAC-IF031B-E) .......................................................... C-31
6Controller operation ............................................C-32
FTC(PAC-IF021B-E) ............................................................ C-32
FTC2(PAC-IF031B-E) .......................................................... C-42
7Definition of analog signal..................................C-52
FTC(PAC-IF021B-E) ............................................................ C-52
FTC2(PAC-IF031B-E) .......................................................... C-53
8Troubleshooting...................................................C-54
FTC(PAC-IF021B-E) ............................................................ C-54
FTC2(PAC-IF031B-E) .......................................................... C-55
Flow temp. controller
Contents

Flow temp. controller
C-2
Installation (FTC) Flow temp. controller
1
C-2
Fig. 1-1
ON/OFF
TEMP.


FTC
1.1 Check the parts (Fig.1-1)
The FTC unit should be supplied with the following parts.
Part Name Q'ty
1FTC unit 1
2Thermistor 2
3Remote controller cable(5m) 1
4Remote controller 1
1.3 Installing the FTC unit (Photo.1-1, Fig.1-2)
1. Remove 2 screws from FTC unit and remove the cover.
2. Install the 4 screws (locally supplied) in 4 holes.
AScrew BCover
CHole for installation
1.2 Choosing the FTC unit installation
location
• Do not install the FTC unit in outdoor location as it is designed
for indoor installation only. (It is not waterproof against raindrop.)
• 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 pro-
duced, flow, or accumulate.
• 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 sulfu-
ric gas.
• Do not install in location that is hot or humid for long periods of
time.
22
(11.5)
Unit:mm
11.5
:5
:12
10
200
313
3-ELECTRIC WIRE INLET
When installed on a wall: Lower side
278
336
69
TB61 TB62
TB141TB142


TB6
Fig. 1-2
Photo. 1-1
BA

Flow temp. controller
C-3
Installation (FTC2) Flow temp. controller
1
C-3
Fig. 1-1
ON/OFF
TEMP.


FTC2
1.1 Check the parts (Fig. 1-1)
The FTC2 unit should be supplied with the following parts.
Part Name Q'ty
1FTC2 unit 1
2Thermistor 3
3Remote controller cable (5m) 1
4Remote controller 1
1.3 Installing the FTC2 unit ( Photo.1-1, Fig. 1-2 )
1. Remove 2 screws from FTC2 unit and remove the cover.
2. Install the 4 screws (locally supplied) in 4 holes.
AScrew BCover
CHole for installation
1.2 Choosing the FTC2 unit installation
location
• Do not install the FTC2 unit in outdoor location as it is designed
for indoor installation only. (The FTC2 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 pro-
duced, flow, or accumulate.
• 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 sulfu-
ric gas.
• Do not install in location that is hot or humid for long periods of
time.
22
(11.5)
Unit:mm
11.5
:5
:12
10
200
313
3-ELECTRIC WIRE INLET
When installed on a wall: Lower side
278
336
69
TB61 TB62
TB141TB142


TB6
Fig.1-2
Photo. 1-1
BA

Flow temp. controller
C-4
System (FTC) Flow temp. controller
2
C-4
FTC
To start, check your system type by following the flow chart below. (FTC can be used for 3 types of systems.)
+In this system,
• Heating ECO mode of FTC is
not available.
• It is NOT necessary to switch
operation mode to realize
Hot water mode, Anti freeze
mode and Heating ECO mode.
Simply change the target temp.
by Analog signal.
Start
‘Target flow temperature’ is set…
By remote controller
By remote controller Your system is
BASIC SYSTEM.
Your system is
SIMPLE SYSTEM.
Your system is ANALOG TEMP. SYSTEM.
Remote controller
FTC PCB BOX FTC PCB BOX FTC PCB BOX
Remote controller
System controller
(locally supplied)
SIMPLE SYSTEM BASIC SYSTEM ANALOG TEMP. SYSTEM
ON/OFF
Operation mode
Operation mode
- Heating
- Heating ECO
- Hot water
- Anti freeze
- Cooling
Operation mode
- Heating +
- Cooling
Target flow temp.
Target flow temp.
Target flow temp.
ON/OFF
Remote controller
ON/OFF
By Non-voltage
Contact signals
By Non-voltage
Contact signals
End user interface
End user interface
System controller
(locally supplied)
End user interface
To preset
- target temp. for each mode
- target temp. parameters
(See Page C-57-58 for details)
To preset
- analog signal parameters
(See Page C-81 for details)
Analog signal
4-20mA/1-5V/0-10V
Heat Pump switch ON/OFF
and the operation mode
change is done…
By external signals from local controller
(non-voltage contact signals)
By external signals from local controller
(Analog signal:4-20mA/ 1-5V/ 0-10V)

Flow temp. controller
C-5
System (FTC) Flow temp. controller
2
C-5
Refer to the relevant sections for details according to your system type.
System System diagram Power
supplies
Thermistor
(TH1, TH2)
Switch
setting
External
input
External
output
Outdoor
unit
BASIC SPLIT type
PACKAGED
type
SPLIT type
PACKAGED
type
SPLIT type
PACKAGED
type
ANALOG
TEMP.
SIMPLE
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
5
5
5
5
5
5
5
5
5
5
5
5
3.2.1
3.2.2
3.2.1
3.2.2
3.2.1
3.2.1
3.2.1
3.2.2
3.2.1
3.2.2
3.2.1
3.2.1
3.2.1
3.2.2
3.2.1
3.2.2
3.2.1
3.2.1
3.1
3.1.1
3.1
3.1.2
3.1
3.1.1
3.1
3.1.2
3.1
3.1.1
3.1
3.1.2
3.1
3.1.1
3.1
3.1.2
3.1
3.1.1
3.1
3.1.2
3.1
3.1.1
3.1
3.1.2
3.4.1
3.4.1
3.4.1
3.4.1
3.4.1
3.4.2
3.4.1
3.4.2
3.4.1
3.4.2
3.4.1
3.4.2
FTC
TH1 FTC Outdoor unit
FTC Outdoor unit
FTC Outdoor unit
FTC Outdoor unit
FTC Outdoor unit
FTC Outdoor unit
FTC Outdoor unit
FTC Outdoor unit
FTC Outdoor unit
FTC Outdoor unit
FTC Outdoor unit
FTC Outdoor unit
TH2
Local controller
ON/OFF
MODE Remote controller
(PAR-W21MAA)
Remote controller
(PAR-W21MAA)
Remote controller
(PAR-W21MAA)
Remote controller
(PAR-W21MAA)
Remote controller
(PAR-W21MAA)
Remote controller
(PAR-W21MAA)
Remote controller
(PAR-W21MAA)
Remote controller
(PAR-W21MAA)
Remote controller
(PAR-W21MAA)
Remote controller
(PAR-W21MAA)
Remote controller
(PAR-W21MAA)
Remote controller
(PAR-W21MAA)
FTC
TH1
FTC
TH1
FTC
TH1
FTC
TH1
FTC
TH1
TH2
FTC
TH1
TH2
Local controller
ON/OFF
Temp.
FTC
TH1
TH2
FTC
TH1
TH2
FTC
TH1
TH2
FTC
TH1
FTC
TH1
—
—
—
—
 
Local controller
ON/OFF
MODE
 
Local controller
ON/OFF
MODE
 
 
Local controller
ON/OFF
MODE
 
Local controller
ON/OFF
Temp.
 
Local controller
ON/OFF
Temp.
 
Local controller
ON/OFF
Temp.
 
SPLIT type : the standard outdoor unit without a plate HEX (Refrigetant-water HEX) inside
PACKAGED type : the Air to Water outdoor unit with a plate HEX (Refrigetant-water HEX) inside

Flow temp. controller
C-6
System (FTC2) Flow temp. controller
2
C-6
First step (Electrical work)
Power supplies (Outdoor only)
Remote controller or external input
Mode select Temp. setting System diagram
Remote controller
only
Outdoor unit onlyRemote controllerRemote controller
(PAR-W21MAA) (PAR-W21MAA)
3.1
3.1.1 3.2
Remote controller
and external input
Outdoor unit onlyRemote controllerLocal controller
(External input) (PAR-W21MAA)
3.1
3.1.1 3.2
3.3
3.3.1
External input and
analog input
Outdoor unit onlyAnalog inputLocal controller
(External input)
3.1
3.1.1 3.3
3.3.1
3.3.2
Power supplies Operation mode
input
Outdoor unit
FTC2
Remote controller
(PAR-W21MAA)
Outdoor unit
FTC2
Remote controller
(PAR-W21MAA)
Local controller
(ON/OFF,MODE)
Local controller
(ON/OFF,MODE,Temp.)
Outdoor unit
FTC2
FTC2
The FTC2 is designed for use with a number of heat pump systems. Please refer to the following table to find the relevant installation information
for your system.

Flow temp. controller
C-7
System (FTC2) Flow temp. controller
2
C-7
Second step (thermistor setting)
Outdoor type (SPLIT type / PACKAGED type)
Domestic Hot Water (DHW) tank
Outdoor unit type DHW tank System diagram
SPLIT type TH1: actual flow water temp.
TH2: refrigerant pipe temp.
TH5: actual DHW tank temp.
3.4
TH1: actual flow water temp.
TH2: refrigerant pipe temp.
TH5:
3.4
PACKAGED type TH1: actual flow water temp.
TH2:
TH5: actual DHW tank temp.
3.4
TH1: actual flow water temp.
TH2:
TH5:
3.4
Thermistor
(TH1,TH2,TH5)
Outdoor unit
FTC2
DHW tank
TH1
TH5
Radiator etc.
Heat exchanger
Outdoor unit
FTC2
TH1 Radiator etc.
Heat exchanger
TH1
Outdoor unit
FTC2
DHW tank
TH5
Radiator etc.
TH2
Heat exchanger
TH1
Outdoor unit
FTC2
Radiator etc.
TH2
Heat exchanger
(Present)
(Present)
(Absent)
(Absent)

Flow temp. controller
C-8
System (FTC2) Flow temp. controller
2
C-8
Third step (Heater setting)
Immersion heater
Booster heater position
Immersion heater Booster heater
position System diagram
Booster heater
only
both DHW
and Heating
3.5
Booster heater
and
Immersion heater
both DHW
and Heating
3.5
Booster heater
only
Heating only
3.5
Booster heater
and
Immersion heater
Heating only
3.5
Output signal
Booster
heater
FTC2
Sanitary tank
Radiator etc.
Booster
heater
FTC2
Sanitary tank
Radiator etc.
Immersion
heater
Booster
heater
FTC2
Sanitary tank
Radiator etc.
Booster
heater
FTC2
Sanitary tank
Radiator etc.
Immersion
heater
(Present)
(Present)
(Absent)
(Absent)

Flow temp. controller
C-9
Electrical work (FTC) Flow temp. controller
3
C-9
FTC
3.1.1. FTC unit power supplied from outdoor unit
The following connection patterns are available.
The outdoor unit must be powered properly. (Details are shown in its installation manual.)
S1
S2
L
N
S1
S2
S3
S3
AB C
D
E
FA Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
E FTC unit/outdoor unit connecting cables
F FTC unit
*1.Max. 80 m
*2.The figures are NOT always against the ground.
S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are not electrically insulated by the transformer or other device.
Notes: 1. Wiring size must comply with the applicable local and national codes.
2. Power supply cables and FTC unit/outdoor unit connecting cables shall not be lighter than polychloroprene sheathed flex-
ible cable. (Design 60245 IEC 57)
3. Install an earth wire longer than other cables.
FTC unit-Outdoor unit
FTC unit model
*1
FTC unit-Outdoor unit earth *1
FTC unit-Outdoor unit S1-S2 *2
FTC unit-Outdoor unit S2-S3 *2
PAC-IF021B-E
AC 230 V
DC24 V
1× Min.1.5
3×1.5 (polar)
Circuit
rating
Wiring
Wire No. × size
(mm
2
)
Photo. 3-2
Photo. 3-1
AB
C
E
C
D
NL
S2 S3S1
E: FTC unit/outdoor unit
connecting cables
Earth cable
TB6
3.1. FTC (Photo. 3-1)
1. Remove the cover.
2. Wire the power cable and control cable separately through the
respective wiring inlets given in the photo.
• Make sure to put screws tightly.
AInlet for control cable
BInlet for power
CClamp
DFTC / Outdoor unit connecting terminals
EEarth terminal

Flow temp. controller
C-10
Electrical work (FTC) Flow temp. controller
3
C-10
3.1.2 Separate FTC unit/outdoor unit power supplies
The following connection patterns are available.
The outdoor unit power must be powered properly (Details are shown in its installation manual).
S1
S2
L
N
L
N
S1
S2
S3
S3
ACB
D
G
E
BC
FA Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
E FTC unit/outdoor unit connecting cables
F FTC unit
G FTC unit power supply
If the FTC and outdoor units have separate power supplies, refer to the
table below.
Separate power supply specifications
FTC unit controller connector (CNS2)
connection change
Disconnected
Outdoor unit DIP switch settings (when
using separate FTC unit/outdoor unit
power supplies only)
ON 3
OFF 1 2 (SW8)
Set the SW8-3 to ON.
FTC unit model PAC-IF021B-E
FTC unit power supply ~/N (Single Phase), 50 Hz, 230 V
FTC unit input capacity
Main switch (Breaker)
*1 16 A
Wiring
Wire No. ×
size
(mm2)
FTC unit power supply & earth 3 × Min. 1.5
FTC unit-Outdoor unit *2 2 × Min. 0.3
FTC unit-Outdoor unit earth –
Circuit
rating
FTC unit L-N *3 AC 230 V
FTC unit-Outdoor unit S1-S2 *3 –
FTC unit-Outdoor unit S2-S3 *3 DC24 V
*1.A breaker with at least 3.0mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
*2.Max. 120 m
*3.The figures are NOT always against the ground.
Notes: 1. Wiring size must comply with the applicable local and national code.
2. Power supply cables and FTC unit/outdoor unit connecting cables shall not be lighter than polychloroprene sheathed flex-
ible cable. (Design 60245 IEC 57)
3. Install an earth wire longer than other cables.
Photo. 3-3 CNS2
NL
S2 S3S1
E: FTC unit/outdoor unit
connecting cable
Power Supply Cables
TB6

Flow temp. controller
C-11
Electrical work (FTC) Flow temp. controller
3
C-11
3.2. Connecting thermistor cable
Connect the thermistor 2for the FTC controller.
3.2.1. Connecting the actual flow water temp. thermistor (TH1)
Connect the thermistor for the actual flow water temp. to 1 and 2 on
the terminal block (TB61) on the FTC controller.
When the thermistor cables are too long, cut them at the
appropriate length.
Do not bind them in the FTC unit.
<Thermistor position>
Fix TH1 on water piping (water outlet side).
Note: Be sure to attach the TH1 where it detects Flow
temp.(Water oulet side) correctly.
3.2.2 Connecting the pipe temp. thermistor (TH2)
Connect the thermistor for the refrigerant pipe temp. to 3 and 4 on
the terminal block (TB61) on the FTC (PCB).
For packaged Outdoor unit : It is not necessary to connect TH2.
For split Outdoor unit : Connect TH2.
When the thermistor cables supplied with FTC are too long, cut
them to the appropriate length.
Do not bind them in the FTC unit.
<Thermistor position>
Fix the TH2 firmly on refrigerant piping (Liquid side) so that it can not be detached easily.
It is better to protect the thermistor with heat insulating materials not to be affected by the ambient temperature.
Note: Be sure to attach the TH2 where it detects Refrigerant piping temp. (Liquid side) correctly.
Caution:
Do not route the thermistor cables together with power cables.
The sensor part of the thermistor should be installed where user must not touch.
(It is separated by the supplementary insulation from where user may touch.)
<Thermistor position and necessity>
FTC
Outdoor unit
TH1
TH2 *1
*1
Water piping
Refrigerant piping
Water OUTLET side
Refrigerant LIQUID side
FTC
Outdoor unit
Packaged type
(with a refrigerant-water HEX inside)
SPLIT type
(without refrigerant-water
HEX inside)
*1 Refrigerant-water HEX *1 Refrigerant-water HEX
TH1
Water piping
Water OUTLET side
TH2
TH2:
not necessary
PACKAGED type outdoor unit SPLIT type outdoor unit
Photo. 3-4
TB61
TH1
TH2
TB62
Wired remote controller cable
Outdoor unit TH1 TH2 TH5
PACKAGED type ΟХХ
SPLIT type ΟΟХ
Ο: Necessary. Connect the thermistor.
Х: Not necessary. The thermistor is not needed to connect.

Flow temp. controller
C-12
Electrical work (FTC) Flow temp. controller
3
C-12
3030
30120
83.5
B-1. B-2.
Fig. 3-2
BTB
Fig. 3-1
Fig. 3-3
46
A6

















3.3. Connecting the wired remote controller
3.3.1 Connecting the wired remote controller
cable to FTC
Connect the wired remote controller cable to 5 and 6 on the termi-
nal block (TB62) on the FTC controller. (Photo. 3-4)
Wiring wire No. × size (mm2) : 2 × 0.3 (Non-polar)
The 5m wire is attached as an accessory. Max. 500 m
Wiring size must comply with the applicable local and national
codes.
Circuit rating: DC12V
Circuit rating is NOT always against the ground.
3.3.2 For wired remote controller
1) Installing procedures
1. Select an installing position for the remote controller. (Fig. 3-1)
►Procure the following parts locally:
2 piece switch box
Thin copper conduit tube
Lock nuts and bushings
[Fig. 3-1]
ARemote controller profile
BRequired clearances surrounding the remote controller
CInstallation pitch
2. Seal the service entrance for the remote controller cable with
putty to prevent possible invasion of dew drops, water, cock-
roaches or insects. (Fig. 3-2)
AFor installation in the switch box
BFor direct installation on the wall, select one of the followings:
• Prepare a hole through the wall to pass the remote controller
cable (in order to take out the remote controller cable from the
back), then seal the hole with putty.
• Take out the remote controller cable through the cut-out upper
case, then seal the cut-out notch with putty.
B-1. To lead the remote controller cable from the back of the
controller
B-2. To take out the remote controller cable through the upper
portion
[Fig. 3-2]
CWall GSwitch box
DConduit HRemote controller cable
ELock nut ISeal with putty
FBushing JWood screw
2) Connecting procedures (Fig. 3-3)
1Connect the remote controller cable to the terminal block.
ATo TB62 No.5 and 6 on the FTC unit
BTB6 (No polarity)
3.4. Connecting external input
FTC can be operated by following external input.
3.4.1. EXTERNAL INPUT ( Contact signal )
TB142 OFF ON Remark
1-2 (IN1) — — Not in use
3-4 (IN2) — — Not in use
5-6 (IN3) Normal Forced Comp. OFF SW3-6=OFF
Forced Comp. OFF Normal SW3-6=ON
7-8 (IN4) OFF Cooling
10-11 (COM-IN5) OFF Heating
10-12 (COM-IN6) OFF Heating ECO *1
10-13 (COM-IN7) OFF Hot Water
10-14 (COM-IN8) OFF Anti-Freeze
*1 Heating ECO mode sets the set temperature depending on the
outdoor temperature.
TB142
FTC
11
10
12
13
14
At site
HeatingECO →
Anti-Freeze →
Hot Water →
Heating →
6
5
7
8
9
2
1
3
4
Forced Comp. OFF→
Cooling →
3 5 7 9 11 131
4268101214
TB142

Flow temp. controller
C-13
Electrical work (FTC) Flow temp. controller
3
C-13
3.4.2 EXTERNAL INPUT ( analog signal ) 4-20mA / 1-5V / 0-10V
Connect the transmission cables to No. 3 and 4 on the terminal block (TB62).
No. 3 on the terminal block(TB62) : Plus side
No. 4 on the terminal block(TB62) : Minus side (Reference side)
Switch setting
Input Outdoor unit SW1-1 SW1-2 SW1-5 SW1-6 SW6-1 SW6-2
4-20mA SPLIT type OFF ON OFF OFF ON ON
PACKAGED type OFF ON ON OFF ON ON
1-5V SPLIT type OFF ON OFF OFF OFF ON
PACKAGED type OFF ON ON OFF OFF ON
0-10V SPLIT type ON ON OFF OFF OFF OFF
PACKAGED type ON ON ON OFF OFF OFF
4-20mA / 1-5V / 0-10V setting
Caution:
The external input signals are separated by basic insulation from power supply for the unit.
The external input signals should be separated by supplementary insulation from where user may touch in case that it is installed
where user may touch.
Connect the terminals by using the ring terminals and also insulate the cables of adjoining terminals when wiring to terminal block.
3.5. Connecting external output (Photo. 3-5)
TB141 Item OFF ON
1-2 (OUT1) X1 Operation Output OFF ON
3-4 (OUT2) X2 Error Output Normal Error
5-6 (OUT3) X3 Comp. Output OFF ON
7-8 (OUT4) X4 Defrost Output OFF ON
9-10 (OUT5) X5 Mode(Cooling) Output OFF ON
11-12 (OUT6) X6 Mode(Heating/HeatingECO/Hot Water/ Anti-Freeze) Output OFF ON
13-14 (OUT7) X7 — — —
Note :
External output signals are separated by basic insulation from other circuit of interface.
Caution :
When 2 or more external outputs are used, the power supply on the output side should be the same.
3.6. Wiring specification of External output / External input
Locally supplied parts
Item Name Model and specifications
External output
function
External output signal
wire
Use sheathed vinyl coated cord or cable.
Max. 50m
Wire type :CV, CVS or equivalent
Wire size :Stranded wire 0.5mm2to 1.25mm2
Solid wire: {0.65mm to {1.2mm
Display lamp, etc. Non-voltage Contact AC220-240V (DC30V), 1A or less
*Connect the surge absorber according to the load at site.
External input
function
External input signal
wire
Use sheathed vinyl coated cord or cable.
Max. 10m
Wire type :CV, CVS or equivalent
Wire size :Stranded wire 0.5mm2to 1.25mm2
Solid wire : {0.65mm to {1.2mm
Switch Non-voltage "a" contact signals
Remote switch : minimum applicable load DC 12V, 1mA
Photo.3-5
TB141
FTCAt site
6
5
2
1
4
3
TB62
4-20mA/1-5V/0-10V (
Wired remote controller (
+
0mA -- 4mA --------------- 20mA
0V-------1V------------------- 5V
0V------------------10V
No.1 Temp.
Stop
4-20mA
Refer to the section 8 for details about No1, 2 Temp.
The selectable set temperature range depends on SW1-7, 8.
1-5V
0-10V
No.2 Temp.
FLOW TEMP.
ANALOG
SIGNAL
1FTC TB141
At site
X1
2 3
X2
4 5
X3
6 7
X4
8 9
X5 X6 X7
1413121110
3 5 7 9 11 131
42
TB141
6 8 10 12 14

Flow temp. controller
C-14
Electrical work (FTC2) Flow temp. controller
3
C-14
3.1. FTC2 (Photo. 3-1)
1. Remove the cover.
2. Wire the power cable and control cable separately through the
respective wiring inlets given in the photo.
• Make sure to put screws tightly.
AInlet for control cable
BInlet for power cable
CClamp
DFTC2 / Outdoor unit connecting terminals
EEarth terminal
3.1.1. FTC2 unit power supplied from outdoor unit
The outdoor unit must be powered properly. (Details are shown in its installation manual.)
S1
S2
L
N
S1
S2
S3
S3
AB C
D
E
FA Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
E FTC2 unit/outdoor unit connecting cables
F FTC2 unit
*1.Max. 80 m
*2.The figures are NOT always against the ground.
S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are not electrically insulated by the transformer or other device.
Notes: 1. Wiring size must comply with the applicable local and national codes.
2. Power supply cables and FTC2 unit/outdoor unit connecting cables shall not be lighter than polychloroprene sheathed flex-
ible cable. (Design 60245 IEC 57)
3. Install an earth wire longer than other cables.
FTC2 unit-Outdoor unit
FTC2 unit model
*1
FTC2 unit-Outdoor unit earth *1
FTC2 unit-Outdoor unit S1-S2 *2
FTC2 unit-Outdoor unit S2-S3 *2
PAC-IF031B-E
AC 230 V
DC24 V
1× Min.1.5
3 × 1.5 (polar)
Circuit
rating
Wiring
Wire No. × size
(mm2)
Photo. 3-2
Photo. 3-1
AB
C
E
C
D
NL
S2 S3S1
E: FTC2 unit/outdoor unit
connecting cables
Earth cable
TB6
FTC2

Flow temp. controller
C-15
Electrical work (FTC2) Flow temp. controller
3
C-15
3030
30120
83.5
B-1. B-2.
Fig. 3-2
BTB
Fig. 3-1
Fig. 3-3
46
A6

















3.2. Connecting the wired remote controller
3.2.1. Connecting the wired remote controller
cable to FTC2
Connect the wired remote controller cable to 5 and 6 on the termi-
nal block (TB62) on the FTC2 controller. (Photo. 3-3)
Wiring wire No. × size (mm2) : 2×0.3 (Non-polar)
The 5m wire is attached as an accessory. Max. 500 m
Wiring size must comply with the applicable local and national
codes.
Circuit rating: DC12V
Circuit rating is NOT always against the ground.
3.2.2. For wired remote controller
1) Installing procedures
(1)Select an installing position for the remote controller. (Fig. 3-1)
►Procure the following parts locally:
2 piece switch box
Thin copper conduit tube
Lock nuts and bushings
[Fig. 3-1]
ARemote controller profile
BRequired clearances surrounding the remote controller
CInstallation pitch
(2)Seal the service entrance for the remote controller cable with
putty to prevent possible invasion of dew drops, water, cock-
roaches or insects. (Fig. 3-2)
AFor installation in the switch box
BFor direct installation on the wall, select one of the followings:
• Prepare a hole through the wall to pass the remote controller
cable (in order to take out the remote controller cable from the
back), then seal the hole with putty.
• Take out the remote controller cable through the cut-out upper
case, then seal the cut-out notch with putty.
B-1. To lead the remote controller cable from the back of the
controller
B-2. To take out the remote controller cable through the upper
portion
[Fig. 3-2]
CWall GSwitch box
DConduit HRemote controller cable
ELock nut ISeal with putty
FBushing JWood screw
2) Connecting procedures (Fig. 3-3)
1Connect the remote controller cable to the terminal block.
ATo TB62 No.5 and 6 on the FTC2 unit
BTB6 (No polarity)
Photo.3-3
TB61
TH1
TH2
TB62
Wired remote controller cable
TH5

Flow temp. controller
C-16
Electrical work (FTC2) Flow temp. controller
3
C-16
3.3. Connecting external input
FTC2 can be operated by following external input.
3.3.1. EXTERNAL INPUT ( Contact signal )
Terminal block OFF (Open) ON (Short) Remark
TB142 1-2 (IN1) OFF Emergency
TB142 3-4 (IN2) OFF Legionella prevention *3
TB142 5-6 (IN3) Normal Comp. OFF SW3-6 = OFF
Comp. OFF Normal SW3-6 = ON
TB142 7-8 (IN4) OFF Cooling
TB142 10-11 (COM-IN5) OFF Heating
TB142 10-12 (COM-IN6) OFF Heating ECO *1
TB142 10-13 (COM-IN7) OFF Hot Water *4
TB142 10-14 (COM-IN8) OFF Anti-Freeze
TB62 1-2 (Ana. IN1) Normal operation Comp. OFF *2 SW3-4 = OFF
Comp. OFF *2 Normal operation SW3-4 = ON
*1 Heating ECO mode sets the set temperature depending on the outdoor temperature.
*2 In case of Cooling, Heating, Heating ECO and Anti-Freeze.
*3 Input signal: Pulse
Pulse specifications: ON (short)
OFF (open)
*4 When SW1-1 and SW1-2 are OFF, the mode is switched into Auto hot water.
Input signal: Pulse
Pulse specifications: ON (short)
OFF (open)
When SW1-1 or SW1-2, or both are ON, the mode is switched into Hot water.
TB142
FTC2
11
10
12
13
14
At site
HeatingECO →
Anti-Freeze →
Hot Water →
Heating →
6
5
7
8
9
2
1
3
4
Forced Comp. OFF→
Cooling
Emergency
Legionella prevention
→
→
→
357911131
4268101214
TB142
3.3.2. EXTERNAL INPUT ( analog signal ) 4-20mA / 1-5V / 0-10V
Connect the transmission cables to No. 3 and 4 on the terminal block (TB62).
No. 3 on the terminal block (TB62) : Plus side
No. 4 on the terminal block (TB62) : Minus side (Reference side)
4-20mA / 1-5V / 0-10V setting
Caution:
The external input signals are separated by basic insulation from power supply for the unit.
The external input signals should be separated by supplementary insulation from where user may touch in case that it is installed
where user may touch.
Connect the terminals by using the ring terminals and also insulate the cables of adjoining terminals when wiring to terminal block.
3.3.3. Wiring specification of External input
Locally supplied parts
Item Name Model and specifications
External input
function
External input signal
wire
Use sheathed vinyl coated cord or cable.
Max. 10m
Wire type :CV, CVS or equivalent
Wire size :Stranded wire 0.5mm2to 1.25mm2
Solid wire : {0.65mm to {1.2mm
Switch Non-voltage "a" contact signals
Remote switch : minimum applicable load DC 12V, 1mA
Photo.3-4
TB141
FTC2At site
6
5
2
1
4
3
TB62
4-20mA/1-5V/0-10V (
Wired remote controller (
+
Thermostat (
0mA -- 4mA --------------- 20mA
0V-------1V------------------- 5V
0V------------------10V
No.1 Temp.
Stop
4-20mA
Refer to the section 10 for details about No1, 2 Temp.
1-5V
0-10V
No.2 Temp.
FLOW TEMP.
ANALOG
SIGNAL
200ms or more
200ms or more

Flow temp. controller
C-17
Electrical work (FTC2) Flow temp. controller
3
C-17
3.4. Connecting thermistor cable
Connect the thermistor 2for the FTC2 controller.
3.4.1. Connecting the actual flow water temp. thermistor (TH1)
Connect the thermistor for the actual flow water temp. to 1 and 2 on
the terminal block (TB61) on the FTC2 controller.
When the thermistor cables are too long, cut them at the
appropriate length.
Do not bind them in the FTC2 unit.
<Thermistor position>
Put TH1 on water piping (water outlet side) after booster heater.
Note: Be sure to attach the TH1 where it detects Flow
temp.(Water oulet side) correctly.
3.4.2. Connecting the pipe temp. thermistor (TH2)
Connect the thermistor for the refrigerant pipe temp. to 3 and 4 on
the terminal block (TB61) on the FTC2 controller.
For packaged Outdoor unit : It is NOT necessary to connect TH2.
For split Outdoor unit : Connect TH2.
When the thermistor cables supplied with FTC2 are too long, cut
them to the appropriate length.
Do not bind them in the FTC2 unit.
<Thermistor position>
Put the TH2 on refrigerant piping (Liquid side).
It is better to protect the thermistor with heat insulating materials not to be affected by the ambient temperature.
Note: Be sure to attach the TH2 where it detects Refrigerant piping temp. (Liquid side) correctly.
3.4.3. Connecting the actual DHW tank thermistor (TH5)
Connect the thermistor for the actual DHW tank temp. to 5 and 6 on the terminal block (TB61) on the FTC2 controller.
When the thermistor cables supplied with the FTC2 are too long, cut them to the appropriate length.
Do not bind them in the FTC2 unit.
<Thermistor position>
Put the TH5 on the DHW tank. It should be positioned directly onto the lower half of the external surface of the tank.
Caution:
Do not route the thermistor cables together with power cables.
The sensor part of the thermistor should be installed where user must not touch.
(It is separated by the supplementary insulation from where user may touch.)
3.4.4. Thermistor position and necessity
For packaged type Outdoor unit: It is NOT necessary to connect TH2.
For split type Outdoor unit: Connect TH2
<Thermistor position and necessity>
Outdoor Type DHW tank TH1 TH2 TH5
PACKAGED type Present ΟХΟ
Absent ΟХХ
SPLIT type Present O O O
Absent ΟΟХ
Ο: Necessary. Connect the thermistor. Х: Not necessary. The thermistor is not required, do not connect.
Photo.3-3
TB61
TH1
TH2
TB62
Wired remote controller cable
TH5
SPLIT type outdoor unit without DHW tank
Outdoor unit
*1 Water piping
TH1
Booster heater
Water OUTLET
side
TH2
TH5
TH5:
not necessary
SPLIT type
(without a refrigerant-water HEX inside)
Refrigerant LIQUID side
Refrigerant piping
FTC2
*1 Refrigerant-water HEX
PACKAGED type outdoor unit without DHW tank
Outdoor unit
*1 Water piping
TH1
Booster heater
Water OUTLETside
after Booster heater FTC2
TH2 TH5
TH2:
not necessary
TH5:
not necessary
PACKAGED type
(with a refrigerant-water HEX inside) *1 Refrigerant-water HEX
SPLIT type outdoor unit with DHW tank
Outdoor unit
*1 Water piping
TH1
Booster heater
Water OUTLET
side
TH2
SPLIT type
(without a refrigerant-water HEX inside)
Refrigerant LIQUID side
Refrigerant piping
FTC2
TH5
DHW tank
temperature
*1 Refrigerant-water HEX
PACKAGED type outdoor unit with DHW tank
Outdoor unit
*1 Water piping
TH1
Booster heater
Water OUTLETside
after Booster heater FTC2
TH2
TH5
TH2:
not necessary
PACKAGED type
(with a refrigerant-water HEX inside)
DHW tank
temperature
*1 Refrigerant-water HEX

Flow temp. controller
C-18
Electrical work (FTC2) Flow temp. controller
3
C-18
3.5. Connecting external output signal
All outputs has AC 230V signal
Output Use Signal Max. current
OUT1 Water circulation pump AC 230A signal for relay drive 0.5 A
OUT2 Booster heater 1 AC 230A signal for relay drive 0.5 A
OUT3 Booster heater 2 AC 230A signal for relay drive 0.5 A
OUT4 Immersion heater AC 230A signal for relay drive 0.5 A
OUT5 3-port valve AC 230A signal for relay drive 0.5 A
OUT6 Defrost AC 230A signal for direct use 0.5 A
OUT7 Error output AC 230A signal for direct use 0.5 A
*FTC2 has terminal beds for AC 230V output signal. (Relays are NOT available on FTC2)
Caution :
Do not drive directly the pump, heater and valve by these output signals.
Connect the surge absorber according to the load at site.
Wiring specification of External output
Locally supplied parts
Item Name Model and specifications
External output
function
External output signal
wire
Use sheathed vinyl coated cord or cable.
Max. 50m
Wire type :CV, CVS or equivalent
Wire size :Stranded wire 0.5mm² to 1.25mm²
Solid wire: {0.65mm to {1.2mm
Relay, etc. AC 230V signal 0.5 A or less
*Connect the surge absorber according to the load at site.
3 5 7 9 11 131
42
TB141
6 8 10 12 14

Flow temp. controller
C-19
Switch setting (FTC) Flow temp. controller
4
C-19
FTC
Set the dip switch on the FTC (PCB) according to the following table.
System ON/OFF
Input
Change mode
Input
Change TEMP.
Input
Outdoor unit *4 SW1-1 SW1-2 SW1-5 SW1-6 SW6-1 SW6-2
BASIC External input
(non-voltage contact)
External input
(non-voltage contact)
DIP switch on PCB
SW2-1~8, SW3-1~3
SPLIT type ON OFF OFF ON OFF OFF
PACKAGED type ON OFF ON ON OFF OFF
External input
(non-voltage contact)
External input
(non-voltage contact)
Wired remote controller SPLIT type ON OFF OFF OFF OFF OFF
PACKAGED type ON OFF ON OFF OFF OFF
ANALOG
TEMP.
External input or
4-20mA *1
External input
(non-voltage contact)
4-20mA SPLIT type OFF ON OFF OFF ON ON
PACKAGED type OFF ON ON OFF ON ON
External input or
1-5V *2
External input
(non-voltage contact)
1-5V SPLIT type OFF ON OFF OFF OFF ON
PACKAGED type OFF ON ON OFF OFF ON
External input External input
(non-voltage contact)
0-10V SPLIT type ON ON OFF OFF OFF OFF
PACKAGED type ON ON ON OFF OFF OFF
BASIC
and
SIMPLE
External input and *3
Wired remote controller
External input and *3
Wired remote controller
DIP switch on PCB
SW2-1~8, SW3-1~3
SPLIT type OFF OFF OFF ON OFF OFF
PACKAGED type OFF OFF ON ON OFF OFF
External input and *3
Wired remote controller
External input and *3
Wired remote controller
Wired remote controller SPLIT type OFF OFF OFF OFF OFF OFF
PACKAGED type OFF OFF ON OFF OFF OFF
SIMPLE Wired remote controller Wired remote controller Wired remote controller SPLIT type OFF OFF OFF OFF OFF OFF
PACKAGED type OFF OFF ON OFF OFF OFF
*1: 4-20mA····OFF: 0~2mA
*2: 1-5V····OFF: 0~0.5V
*3: The command from the external input is prior to the one from the wired remote controller.
*4: SPLIT type : the standard outdoor unit without a plate HEX(refrigerant-water) inside.
PACKAGED type : the Air to Water outdoor unit with a plate of HEX(refrigerant-water) inside
OTHER SWITCH SETTING
SW1-3 Prohibition of Cooling mode
SW1-3=OFF : Operation mode Heating/HeatingECO/HotWater/Anti-freeze/Cooling
SW1-3=ON : Operation mode Heating/HeatingECO/HotWater/Anti-freeze
SW1-4 SW3-4,5,8 Not in use. Set to OFF. (Initial setting)
SW3-7 Not in use. Set to ON. (Initial setting)
SW3-6 Logic of Forced Comp. OFF external signal(TB142 5-6)
SW3-6 TB142 No.5-6 input Item
OFF OFF(open) Normal
ON(short) Forced Comp. OFF
ON OFF(open) Forced Comp. OFF
ON(short) Normal
SW1-6,7,8 Set temperature range
SW1-6=OFF Set temperature range with wired remote controller
SW1-6=ON Set temperature table with DIP switch of FTC
SW1-6 SW1-7 SW1-8 Temperature range with wired remote controller Temperature table
SW2-1~8, SW3-1~3
Heating/HeatingECO/Hot Water Anti-Freeze Cooling
OFF OFF OFF Upper 55 ˚C / lower 20 ˚C Upper 45 ˚C / lower 5 ˚C Upper 25 ˚C / lower 5 ˚C—
OFF ON OFF Upper 60 ˚C / lower 20 ˚C *1 Upper 45 ˚C / lower 5 ˚C Upper 25 ˚C / lower 5 ˚C—
OFF OFF ON Upper 50 ˚C / lower 20 ˚C Upper 45 ˚C / lower 5 ˚C Upper 25 ˚C / lower 5 ˚C—
OFF ON ON — — — —
ON OFF OFF — — — Table1
ON ON OFF — — — Table2
ON OFF ON — — — —
ON ON ON — — — —
*1. Do not use this setting when you use the standard outdoor unit without a plate HEX(Refrigerant-water) inside.
Photo. 4-1
TB61
TH1
TH2 SW1
SW6
SW2
SW3

Flow temp. controller
C-20
Switch setting (FTC) Flow temp. controller
4
C-20
SW2-1~8 SW3-1~3 Fixed set temperature with DIP switch of FTC (Available when SW1-6 is ON)
SW2-1~3 Fixed set temperature for Heating mode (Table 1~2 depends on SW1-7,8.)
SW2-1 SW2-2 SW2-3 Table1Table2
OFF OFF OFF 25 ºC 25 ºC
ON OFF OFF 30 ºC 30 ºC
OFF ON OFF 35 ºC 35 ºC
ON ON OFF 40 ºC 40 ºC
OFF OFF ON 45 ºC 45 ºC
ON OFF ON 50 ºC 50 ºC
OFF ON ON 55 ºC 55 ºC
ON ON ON 60 ºC *1 60 ºC *1
The selectable temperature range for Heating mode depends on outdoor unit type.
*1 Do not use this setting when you use the standard outdoor unit without a plate HEX (refrigerant-water) inside.
SW2-4~6 Fixed set temperature for Hot Water mode (Table 1~2depends on SW1-7,8.)
SW2-4 SW2-5 SW2-6 Table1Table2
OFF OFF OFF 46 ºC 25 ºC
ON OFF OFF 48 ºC 30 ºC
OFF ON OFF 50 ºC 35 ºC
ON ON OFF 52 ºC 40 ºC
OFF OFF ON 54 ºC 45 ºC
ON OFF ON 56 ºC 50 ºC
OFF ON ON 58 ºC 55 ºC
ON ON ON 60 ºC *1 60 ºC *1
The selectable temperature range for Hot Water mode depends on outdoor unit type.
*1 Do not use this setting when you use the standard outdoor unit without a plate HEX (refrigerant-water) inside.
SW2-7,8 Fixed set temperature for Anti-freeze mode (Table 1~2depends on SW1-7,8.)
SW2-7 SW2-8 Table1Table2
OFF OFF 5 ºC 5 ºC
ON OFF 10 ºC 10 ºC
OFF ON 15 ºC 15 ºC
ON ON 20 ºC 20 ºC
SW3-1~3 Fixed set temperature for Cooling mode (Table 1~2depends on SW1-7,8.)
SW3-1 SW3-2 SW3-3 Table1Table2
OFF OFF OFF 7 ºC 7 ºC
ON OFF OFF 10 ºC 10 ºC
OFF ON OFF 12 ºC 12 ºC
ON ON OFF 15 ºC 15 ºC
OFF OFF ON 18 ºC 18 ºC
ON OFF ON 20 ºC 20 ºC
OFF ON ON 22 ºC 22 ºC
ON ON ON 25 ºC 25 ºC