Mitsubishi PAC-IF031B-E Technical Guide
FLOW TEMP. CONTROLLER 2
(Cased)
PAC-IF031B-E
INSTALLATION MANUAL
For safe and correct use, read this manual thoroughly before installing the FTC2 unit.
OPERATION MANUAL
For safe and correct use, please read this operation manual thoroughly before operating the air-conditioner unit.
FOR INSTALLER
FOR USER
English
Contents
1. Safety precautions .....................................................................................2
2. Installing the FTC2 unit .............................................................................3
3. System ......................................................................................................4
4. Electrical work ...........................................................................................7
5. Switch setting of FTC2 ............................................................................ 12
6. Operation setting .....................................................................................14
7. Before test run .........................................................................................21
8. Remote controller operation ....................................................................22
9. Initial setting by remote controller ............................................................ 31
10. Defi nition of analog signal by remote controller ......................................33
11. Troubleshooting ......................................................................................34
Local application factors ................................................................................35
“FTC2” is the abbreviation of “Flow Temperature Controller 2”, which is described as “FTC2” in this manual.
1. Safety precautions
Before installing the FTC2 unit, make sure you read all the “Safety precautions”.
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 damages 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 fi re may be caused.
• For installation work, follow the instructions in the Installation Manual and
use tools and pipe components specifi cally made for use with refrigerant
specifi ed in the outdoor unit installation manual.
• The unit must be installed according to the instructions in order to minimize the risk of damages by earthquakes, typhoons, or strong winds.
Improperly installed unit may fall down and cause damages 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
damages or injuries.
• All electric work must be performed by a qualifi 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 insuffi cient capacity or incorrect
electrical work may result in electric shock or fi re.
After installation, perform the test run to ensure normal operation. Then explain
your customer the “Safety Precautions,” use, and maintenance of the unit based on
the information in the Operation Manual provided by local application manufacture.
Both the Installation Manual and the Operation Manual must be given to the user.
These manuals must always be kept by the actual users.
: Indicates a part which must be grounded.
Warning:
Carefully read the labels attached to the unit.
• Only the specified 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 fi re.
• Terminal block cover panel of the unit must be fi rmly fi xed. If the cover
panel is mounted improperly, dust and moisture may enter the unit, and it
may cause electric shock or fi 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 fi 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 fi 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
fi re. If the FTC2 unit needs to be repaired or moved, ask an installer or an
authorized technician.
1.1. Before installation (Environment)
Caution:
• Do not install the FTC2 unit in outdoor location as it is designed for indoor
installation only. Otherwise electric shock or breakdown may be caused by
water drop, wind or dust.
Do not use the unit in an unusual environment. If the FTC2 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,
fl ow, or accumulate. If combustible gas accumulates around the unit, it may
cause fi re or explosion.
1.2. Before installation or relocation
Caution:
• Be fully careful when moving the units. Do not hold the packaging bands.
Wear protective gloves to unpack and to move it, in order to avoid your
hands be injured by parts.
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 suffi cient capacity. Otherwise,
it may cause a short circuit, overheating, or fi re.
• When installing the power lines, do not apply tension to the cables. The
cables may be cut or overheated resulting in a fi re.
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.
• When installing the unit in a hospital or in a building where communications equipment are installed, you may need to take measure to noise and
electronic interference. Inverters, home appliances, high-frequency medical
equipment, and radio communications equipment can cause the FTC2 unit
to malfunction or to breakdown. At the same time, the noise and electric interference from the FTC2 unit may disturb the proper operation of medical
equipment, and communications equipment.
• Be sure to safely dispose of the packaging materials. Packaging materials,
such as nails and other metal or wooden parts may cause injuries.
• Do not wash the FTC2 unit. You may receive an electric shock.
• 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 specifi ed capacity. If
the circuit breaker capacity is larger than the specified capacity, breakdown or fi re may result.
• 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 turn-
ing off the main power. Otherwise, it may cause breakdown.
1.5. Electric booster and Immersion heaters
Warning:
• FTC2 has signal outputs for booster heaters however it can not isolate
power to them in the event of overheating. All electrical heaters used on
the water circuit must have
2
a) Self cut-out mechanism to prevent overheating OR
b) A thermostat to prevent overheating
2. Installing the FTC2 unit
2.1. Check the parts (Fig. 2-1)
The FTC2 unit should be supplied with the following parts.
Part Name Q'ty
FTC2 unit 1
1
Thermistor 3
2
Remote controller cable (5m) 1
3
Remote controller 1
4
TEMP.
Fig. 2-1
ON/OFF
2.2. 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 produced,
fl ow, 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 sulfuric gas.
• Do not install in location that is hot or humid for long periods of time.
2.3. Installing the FTC2 unit (Fig. 2-2, Photo. 2-1)
1. Remove 2 screws from FTC2 unit and remove the cover.
2. Install the 4 screws (locally supplied) in 4 holes.
Screw B Cover
A
Hole for installation
C
BA
11. 5
TB61 TB62
3-ELECTRIC WIRE INLET
When installed on a wall: Lower side
Photo. 2-1
336
313
TB141TB142
Fig. 2-2
TB6
Unit:mm
(11.5)
:5
:12
22
10
200
278
69
3
3. System
The FTC2 is designed for use with a number of heat pump systems. Please refer to the following table to fi nd the relevant installation information
for your system.
First step (Electrical work)
Power supplies (Outdoor only)
Remote controller or external input
Mode select
Temp. setting
(PAR-W21MAA) (PAR-W21MAA)
System diagram
FTC2
Remote controller
(PAR-W21MAA)
Outdoor unit
Power supplies
Outdoor unit onlyRemote controllerRemote controller
4.1
4.1.1
Operation mode
input
Remote controller
only
4.2
(External input) (PAR-W21MAA)
(External input)
FTC2
Local controller
(ON/OFF,MODE)
FTC2
Local controller
(ON/OFF,MODE,Temp.)
Remote controller
(PAR-W21MAA)
Outdoor unit
Outdoor unit
Outdoor unit onlyRemote controllerLocal controller
4.1
4.1.1
Outdoor unit onlyAnalog inputLocal controller
4.1
4.1.1
Remote controller
and external input
4.2
4.3
4.3.1
External input and
analog input
4.3
4.3.1
4.3.2
4
3. System
Second step (thermistor setting)
Outdoor type (SPLIT type / PACKAGED type)
Domestic Hot Water (DHW) tank
Outdoor unit type DHW tank System diagram
SPLIT type
(Present)
Outdoor unit
TH2
Heat exchanger
FTC2
TH1
DHW tank
TH5
Thermistor
(TH1,TH2,TH5)
TH1: actual flow water temp.
TH2: refrigerant pipe temp.
TH5: actual DHW tank temp.
4.4
Radiator etc.
PACKAGED type
(Absent)
(Present)
(Absent)
Outdoo r uni t
Outdoor unit
Heat e xchanger
Outdoo r unit
FTC2
TH2
Heat exchanger
FTC2
FTC2
TH1
TH1
TH1
DHW tank
TH5
Radiator etc.
Radiator etc.
Radiator etc.
TH1: actual flow water temp.
TH2: refrigerant pipe temp.
TH5:
4.4
TH1: actual flow water temp.
TH2:
TH5: actual DHW tank temp.
4.4
TH1: actual flow water temp.
TH2:
TH5:
4.4
Heat exchanger
5
3. System
Third step (Heater setting)
Immersion heater
Booster heater position
Immersion heater
(Absent)
Booster heater
position
both DHW
and Heating
System diagram
FTC2
Sanitary tank
Output signal
Booster heater
only
4.5
(Present)
(Absent)
(Present)
both DHW
and Heating
Heating only
Heating only
Booster
heater
FTC2
Booster
heater
FTC2
Booster
heater
FTC2
Sanitary tank
Immersion
heater
Sanitary tank
Sanitary tank
Immersion
heater
Radiator etc.
Booster heater
and
Immersion heater
4.5
Radiator etc.
Booster heater
only
4.5
Radiator etc.
Booster heater
and
Immersion heater
4.5
Booster
heater
Radiator etc.
6
4. Electrical work
4.1. FTC2 (Photo. 4-1)
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.
Inlet for control cable
A
Inlet for power cable
B
Clamp
C
FTC2 / Outdoor unit connecting terminals
D
Earth terminal
E
D
C
C
Photo. 4-1
A
E
4.1.1. FTC2 unit power supplied from outdoor unit
The outdoor unit must be powered properly. (Details are shown in its installation manual.)
D
L
AB C
N
S1
S2
S3
E
B
F
S1
S2
S3
A 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
TB6
S2 S3S1
NL
E: FTC2 unit/outdoor unit
connecting cables
Earth cable
Photo. 4-2
FTC2 unit model
FTC2 unit-Outdoor unit
)
2
(mm
Wiring
FTC2 unit-Outdoor unit earth
Wire No. × size
FTC2 unit-Outdoor unit S1-S2
rating
Circuit
FTC2 unit-Outdoor unit S2-S3
*1. Max. 80 m
*2. The fi gures 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.
*1
*1
*2
*2
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 fl exible
cable. (Design 60245 IEC 57)
3. Install an earth wire longer than other cables.
PAC-IF031B-E
3 × 1.5 (polar)
1× Min.1.5
AC 230 V
DC24 V
7
4. Electrical work
30120
46
83.5
Fig. 4-1
B-1. B-2.
TB61
4.2. Connecting the wired remote controller
4.2.1. Connecting the wired remote controller cable to FTC2
Connect the wired remote controller cable to 5 and 6 on the terminal
block (TB62) on the FTC2 controller. (Photo. 4-3)
3030
Wiring wire No. × size (mm
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.
4.2.2. For wired remote controller
1) Installing procedures
(1) Select an installing position for the remote controller. (Fig. 4-1)
► Procure the following parts locally:
2 piece switch box
Thin copper conduit tube
Lock nuts and bushings
[Fig. 4-1]
Remote controller profi le
A
Required clearances surrounding the remote controller
B
Installation pitch
C
(2) Seal the service entrance for the remote controller cable with putty
to prevent possible invasion of dew drops, water, cockroaches or insects. (Fig. 4-2)
Fig. 4-2
For installation in the switch box
A
For direct installation on the wall, select one of the followings:
B
• 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.
BTB
A6
Fig. 4-3
B-1. To lead the remote controller cable from the back of the con-
troller
B-2. To take out the remote controller cable through the upper por-
tion
[Fig. 4-2]
Wall
C
Conduit
D
Lock nut
E
Bushing
F
2) Connecting procedures (Fig. 4-3)
Connect the remote controller cable to the terminal block.
1
To TB62 No.5 and 6 on the FTC2 unit
A
TB6 (No polarity)
B
2
) : 2×0.3 (Non-polar)
Switch box
G
Remote controller cable
H
Seal with putty
I
Wood screw
J
TH1
TH2
TH5
TB62
Wired remote controller cable
Photo.4-3
8
4. Electrical work
4.3. Connecting external input
FTC2 can be operated by following external input.
4.3.1. EXTERNAL INPUT ( Contact signal )
Terminal block OFF (Open) ON (Short) Remark
TB142 1-2 (IN1) OFF Emergency
TB142 3-4 (IN2) OFF
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 specifi cations: 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 specifi cations: ON (short)
OFF (open)
When SW1-1 or SW1-2, or both are ON, the mode is switched into Hot water.
Legionella prevention *3
200ms or more
200ms or more
TB142
3 5 7 9 11 131
Emergency
Legionella prevention
Forced Comp. OFF →
Cooling
Heating →
HeatingECO →
Hot Water →
Anti-Freeze →
4268101214
At site
→
→
→
FTC2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TB142
4.3.2. 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)
Thermostat
4-20mA/1-5V/0-10V
Wired remote controller
FTC2At site
1
(
2
3
4
5
6
TB62
+
(
(
4-20mA / 1-5V / 0-10V setting
FLOW TEMP.
No.2 Temp.
No.1 Temp.
Stop
4-20mA
1-5V
0-10V
Refer to the section 10 for details about No1, 2 Temp.
0mA -- 4mA --------------- 20mA
0V-------1V------------------- 5V
0V------------------10V
ANALOG
SIGNAL
TB141
Photo.4-4
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.
4.3.3. Wiring specifi cation of External input
Locally supplied parts
Item Name Model and specifi cations
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 0.5mm
Solid wire : {0.65mm to {1.2mm
Switch Non-voltage "a" contact signals
Remote switch : minimum applicable load DC 12V, 1mA
2
to 1.25mm
2
9
4. Electrical work
4.4. Connecting thermistor cable
Connect the thermistor 2 for the FTC2 controller.
4.4.1. Connecting the actual fl ow water temp. thermistor (TH1)
Connect the thermistor for the actual fl ow 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.
4.4.2. 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.
TB61
TH1
TH2
TH5
Photo.4-3
TB62
Wired remote controller cable
4.4.3. 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.)
4.4.4. 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
SPLIT type
Present ΟХΟ
Absent ΟХХ
Present O O O
Absent ΟΟХ
Ο: Necessary. Connect the thermistor.
Х: Not necessary. The thermistor is not required, do not connect.
SPLIT type outdoor unit with DHW tank
Refrigerant LIQUID side
Outdoor unit
TH2
SPLIT type
(without a refrigerant-water HEX inside)
Refrigerant piping
FTC2
*1
*1 Refrigerant-water HEX
Water OUTLET
Booster heater
Water piping
TH1
side
DHW tank
temperature
TH5
PACKAGED type outdoor unit with DHW tank
Water OUTLET side
after Booster heater
Outdoor unit
*1
PACKAGED type
(with a refrigerant-water HEX inside)
TH1
Booster heater
Water piping
TH2:
not necessary
*1 Refrigerant-water HEX
FTC2
DHW tank
temperature
TH2
TH5
SPLIT type outdoor unit without DHW tank
Refrigerant LIQUID side
Outdoor unit
TH2
Refrigerant piping
SPLIT type
(without a refrigerant-water HEX inside)
FTC2
*1
*1 Refrigerant-water HEX
10
Water OUTLET
Booster heater
Water piping
TH1
side
TH5:
not necessary
TH5
PACKAGED type outdoor unit without DHW tank
Water OUTLET side
after Booster heater
Outdoor unit
*1
PACKAGED type
(with a refrigerant-water HEX inside)
TH1
Booster heater
Water piping
FTC2
TH2:
not necessary
TH2 TH5
*1 Refrigerant-water HEX
TH5:
not necessary
4. Electrical work
4.5. 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 specifi cation of External output
Locally supplied parts
Item Name Model and specifi cations
External output
function
External output signal
wire
Relay, etc. AC 230V signal 0.5 A or less
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
*Connect the surge absorber according to the load at site.
TB141
42
6 8 10 12 14
357911131
11
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