Mitsubishi Electric PAC-IF013B-E User manual

AIR-HANDLING UNIT (AHU) DESIGN GUIDELINE
INTERFACE
CONTENTS
1. Introduction and Notice ............................ 2
2. Basic Specifications and Connectable
Outdoor Unit Models ............................... 2
3. System........................................................ 3
4. Function - System list............................... 6
5. Input and Output ..................................... 10
6. Requirement on local AHU design ........ 13
7. Additional Requirements for using
R32 Refrigerant ....................................... 15
September 2018
[Model Name]
PAC-IF013B-E
PAC-SIF013B-E
Related document:
Refer to the following manual
• PAC-IF013B-E/PAC-SIF013B-E
INSTALLATION MANUAL
•
PAC-IF013B-E/PAC-SIF013B-E
Modbus manual

2
• This manual shows guidelines regarding the AHU (Air Handling Unit) design and notices for the use of interface unit.
• This guideline details various examples of typical applications for the AHU (Air Handling Unit) controllers and their accompanying units. Please use this in conjunc-
tion with the PAC-IF013B-E/PAC-SIF013B-E installation manual, the Modbus manual, and the outdoor unit installation manual for correct use.
• This interface is to connect Mr. SLIM inverter outdoor unit of MITSUBISHI ELECTRIC to local applications. Please check the following guidelines when designing
the local system.
• MITSUBISHI ELECTRIC does NOT take any responsibility on the local system design. Therefore, MITSUBISHI ELECTRIC does NOT take any responsibility on
the failure (including outdoor unit) caused by local AHU and system design. Also R32 is ammable refrigerant, and the re safety warranty for the whole system
(including outdoor unit) must be done by your side when using R32 refrigerant.
• Conformity of regulations and laws must be conrmed on the system by your side.
1 Introduction and Notice
2 Basic Specifications and Connectable Outdoor Unit Models
2.1 Basic specications of the interface unit
Model name PAC-IF013B-E PAC-SIF013B-E
Power supply ~/N 230V 50Hz
Dimension H: 278mm, W: 336mm, D: 69mm
Weight 2.5kg + Accessories 0.8kg 2.5kg + Accessories 0.4kg
2.2 Connectable outdoor unit models
Outdoor unit model name Connectability Pre-defrost signal/Delayed (balanced) defrost function *1 Refrigerant
PUHZ-ZRP 35VKA Connectable Available from VKA2 model R410A
50VKA Connectable Available from VKA2 model R410A
60VHA Connectable Available from VHA2 model R410A
71VHA Connectable Available from VHA2 model R410A
100V/YKA Connectable Available from V/YKA3 model R410A
125V/YKA Connectable Available from V/YKA3 model R410A
140V/YKA Connectable Available from V/YKA3 model R410A
200YKA ONLY from R1 model Available from YKA2 model R410A
250YKA ONLY from R1 model Available from YKA2 model R410A
PUHZ-P 200YKA ONLY from R1 model Available from YKA2 model R410A
250YKA ONLY from R1 model Available from YKA2 model R410A
PUHZ-SHW 80VHA Connectable Available ONLY from R4 model R410A
112V/YHA Connectable Available ONLY from R4 model R410A
140YHA Connectable Available ONLY from R4 model R410A
230YKA ONLY from YKA2 model Available ONLY from YKA2 model R410A
PUZ-ZM 35VKA Connectable if re-safety is ensured *3 Available R32 *2
50VKA Connectable if re-safety is ensured *3 Available R32 *2
60VHA Connectable if re-safety is ensured *3 Available R32 *2
71VHA Connectable if re-safety is ensured *3 Available R32 *2
100V/YKA Connectable if re-safety is ensured *3 Available R32 *2
125V/YKA Connectable if re-safety is ensured *3 Available R32 *2
140V/YKA Connectable if re-safety is ensured *3 Available R32 *2
*1. Refer to "4. Function - System list".
*2. R32 is ammable refrigerant.
*3. Fire-safety for the whole system (including outdoor unit) must be ensured by your side. Refer to "7. Additional Requirements for using R32 Refrigerant".

3
3.1 System conguration (Single outdoor unit)
*1. Manual step mode:
• Variable capacity request signals for heat pump need to be
calculated by AHU local controller.
• AHU local controller can send “Capacity steps” by non-volt-
age contact signals, analog signals, or Modbus signal to the
interface unit.
• Operation mode can be set by remote controller, external in-
put, DIP switch, or Modbus signal.
No. Part name System (1-1)
1 Interface unit
2 Remote controller
3 Outdoor unit
4 Target air temp. thermistor (TH1) ─
5 Ref. liquid temp. thermistor (TH2)
6 2-Phase temp. thermistor (TH5) *2
7 HEX inlet (Coil on) temp. thermistor (TH11)
8 Air-Handling Unit (AHU) (Local supply)
9 AHU local controller (Local supply)
10 Direct expansion (DX) coil (Local supply)
11 Target air temp. thermistor (Local supply)
12 Louver (Local supply)
13 Air lter (Local supply)
14 Heat recovery (Local supply)
15 Fan (Local supply)
*2. If outdoor unit is PUHZ-SHW model, it’s not needed to install
this thermistor.
3 1
9
12 8
5
6
7
11
10
13
15 14
2
<Fig. 3.1.1>
Step mode (Input) Target temperature Number of outdoor unit Intelligent multiple outdoor unit control System
Manual
─
1 Not available See (1-1) below.
2-6 Use See (2-1) below.
Not use See (1-1) below.*1
Auto Supply air temp. control 1-5 Not available See (1-2) below.
Return air temp. control 1-5 Not available See (1-3) below.
*1. It is recommended to select Intelligent multiple outdoor unit control.
Design local AHU controller to make sure the following points.
• Minimum capacity request should be 20% or more of total capacity.
• Operate all outdoor units when outdoor temperature is below -15 °C.
3 System
Supply Air
(S.A.)
Outdoor Air
(O.A.)
Exhaust Air
(E.A.)
Return Air
(R.A.)
(1-1) Manual step mode *1

4
*3. Auto step mode:
• In this mode, the capacity step of the outdoor unit is controlled
automatically to let the target temperature reach the set tem-
perature.
• Set temperature can be set by remote controller, DIP switch,
or Modbus signal.
• Operation mode can be set by remote controller, external in-
put, DIP switch, or Modbus signal.
Note
• Auto change over function between cooling and heating mode
is NOT available in this system.
*5. Auto step mode:
• In this mode, the capacity step of the outdoor unit is controlled
automatically to let the target temperature reach the set tem-
perature.
• Set temperature can be set by remote controller, DIP switch, or
Modbus signal.
• Operation mode can be set by remote controller, external input,
DIP switch, or Modbus signal.
Note
• Auto change over function between cooling and heating mode is
available ONLY when this system is selected and the input se-
lection of capacity setting (DIP SW1 and SW6) is ″No input (Auto
step mode)″.
3 12
9
12 8
5
6
7
4
10
13
15 14
No. Part name System (1-3)
1 Interface unit
2 Remote controller
3 Outdoor unit
4 Target air temp. thermistor (TH1)
5 Ref. liquid temp. thermistor (TH2)
6 2-Phase temp. thermistor (TH5) *6
7 HEX inlet (Coil on) temp. thermistor (TH11)
8 Air-Handling Unit (AHU) (Local supply)
9 AHU local controller (Local supply)
10 Direct expansion (DX) coil (Local supply)
11 Target air temp. thermistor (Local supply)
─
12 Louver (Local supply)
13 Air lter (Local supply)
14 Heat recovery (Local supply)
15 Fan (Local supply)
*6. If outdoor unit is PUHZ-SHW model, it’s not needed to install
this thermistor.
No. Part name System (1-2)
1 Interface unit
2 Remote controller
3 Outdoor unit
4 Target air temp. thermistor (TH1)
5 Ref. liquid temp. thermistor (TH2)
6 2-Phase temp. thermistor (TH5) *4
7 HEX inlet (Coil on) temp. thermistor (TH11)
8 Air-Handling Unit (AHU) (Local supply)
9 AHU local controller (Local supply)
10 Direct expansion (DX) coil (Local supply)
11 Target air temp. thermistor (Local supply)
─
12 Louver (Local supply)
13 Air lter (Local supply)
14 Heat recovery (Local supply)
15 Fan (Local supply)
*4. If outdoor unit is PUHZ-SHW model, it’s not needed to install
this thermistor.
3 12
9
12 8
5
6
74
10
13
15 14
3 System
(1-2) Auto step mode *3 & Supply air temp. control
Exhaust Air
(E.A.)
Supply Air
(S.A.)
Outdoor Air
(O.A.)
Return Air
(R.A.)
<Fig. 3.1.2>
(1-3) Auto step mode *5 & Return/ Room air temp. control
Exhaust Air
(E.A.)
Supply Air
(S.A.)
Outdoor Air
(O.A.)
Return Air
(R.A.)
<Fig. 3.1.3>

5
3.2 System conguration
(Intelligent multiple outdoor unit control *1)
3.3 Operation range
*1. Interface system receives step request signal correspond to
total capacity of outdoor units, and calculates necessary
capacity for each outdoor unit automatically.
Note
• This intelligent multiple outdoor unit control function is available
only when Manual step mode is selected.
• Up to 6 outdoor units can be connected.
• 2 different type of outdoor units (capacity and/or series) can be
mixed,but connecting the same capacity outdoor units is highly
recommended.
• Ref. address setting on each outdoor unit is needed.
• Interface unit which connects to the Ref. address 0 outdoor unit,
becomes main interface unit.
• Connect AHU local controller (Part No. 9) to the main interface
unit.
• Connect ONE remote controller (Part No. 2) to the interface unit.
• Connect between the interface units with a remote controller (dai-
sy chain). MAX. : 500m
No. Part name System (2-1)
1 Interface unit
2 Remote controller
3 Outdoor unit
4 Target air temp. thermistor (TH1) ─
5 Ref. liquid temp. thermistor (TH2)
6 2-Phase temp. thermistor (TH5) *2
7 HEX inlet (Coil on) temp. thermistor (TH11)
8 Air-Handling Unit (AHU) (Local supply)
9 AHU local controller (Local supply)
10 Direct expansion (DX) coil (Local supply)
11
Target air temp. thermistor (Local supply)
12 Louver (Local supply)
13 Air lter (Local supply)
14 Heat recovery (Local supply)
15 Fan (Local supply)
*2. If outdoor unit is PUHZ-SHW model, it’s not needed to install
this thermistor.
9
12 8
5
6
711
10
13
15 14
2
3 System
Operation range Outdoor temperature Cooling Depend on outdoor unit
Heating Depend on outdoor unit
Coil on temperature Cooling 15 - 32°C
Heating Number of outdoor unit: 1 0 - 28°C
Number of outdoor unit: 2 or more 5 - 28°C
(1) Operation range
Make sure to keep operation range shown at the table below.
Set temperature range in
Auto step mode *1
Supply air control Cooling 12 - 30°C
Heating 17 - 28°C
Return/Room air
temperature control
Cooling 19 - 30°C
Heating 17 - 28°C
Auto cooling/heating *2 19 - 28°C
Note
*1. When potential of the DX coil does not match the capacity of outdoor unit, the air temperature may not reach the set temperature or there may be ON-OFF cycle.
Design the DX coil to match the capacity of outdoor unit. (As for capacity of outdoor unit, refer to "6.2 Standard conditions".)
*2. This function is available ONLY when capacity setting (DIP SW1 and SW6) is "No input (Auto step mode)" and return/room air temp. control is selected (DIP SW
1-7 is ON).
(2) Set temperature range in Auto step mode
<Fig. 3.2.1>
(2-1) Manual step mode (example)
3(Ref. adress: 0)
Outdoor Air
(O.A.)
Supply Air
(S.A.)
1(Main)
Exhaust Air
(E.A.)
3(Ref. adress: 1)
Return Air
(R.A.)
1(Sub)

6
4 Function - System list
Step mode Manual
Input type Analog (0-10V/1-5V/4-20mA/0-10kΩ) Remote switch (A/B) Modbus
Target temp. ───
No. of outdoor unit 1 2-6 1 2-6 1 2-6
Intelligent multiple outdoor unit control (IMOUC) ─Use Not use ─Use Not use ─Use Not use
Group (Auto step mode) ─── ─── ───
Remote controller With Without With With Without With Without With With Without With Without With With Without
System conguration *1 ABCDEABCDEABCDE
No. Item Function name Description
1 IMOUC Intelligent multiple
outdoor unit control (IMOUC)
Interface system receives step request signal corre- spond to total capacity of outdoor units, and calculates necessary capacity for each outdoor unit automatically. (See "3. System".)
─ ─ ──── ──── ──
2 Back up operation In case of one outdoor unit failure, next outdoor unit
starts to operate automatically. ─ ─ ──── ──── ──
3 Rotation control To make cumulative operation time of each outdoor
unit even. (This function is only among same capacity outdoor units.)
─ ─ ──── ──── ──
4 Delayed (balanced)
defrost
To avoid simultaneous defrosting among multiple out- door units as much as possible. *2 ─ ─ *2 ──── *2 ──── *2 ─ ─
5 Output Pre-defrost signal This output becomes ON before defrost starts
(to switch ON back up heater on your side). *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2
6 Step
input
11-step control Rened capacity request in 11 steps becomes possible.
(Only
0-10V)
(Only
0-10V)
(Only
0-10V)
(Only
0-10V)
(Only
0-10V)
─────
7 Con-
nection
Modbus connection Modbus communication is available.
(Refer to the Modbus manual.) *3 *3 *3 *3 *3 *3 *3 *3 *3 *3
8 SD card slot Operation data logging is available. 9 Time stamp function by remote controller for SD card log
data is available. ─ ─ ─ ─ ─ ─
10 Other Auto heating/cool-
ing
Auto change over function between heating and cooling is available. ───────────────
*1. As for system conguration, see the following page. *2. These functions are available ONLY with adaptable outdoor unit. Refer to "2.2 Connectable outdoor unit models". *3. Only reading is available.

7
4 Function - System list
Step mode Auto
Input type "No input (Auto step mode)"
(Input with remote controller) "No input (Auto step mode)" (Input with Modbus)
Target temp. Supply air (SA) Return air (RA) Supply air (SA) Return air (RA)
No. of outdoor unit 1 2-5 1 2-5 1 2-5 1 2-5
Intelligent multiple outdoor unit control (IMOUC) ─ ─ ─ ─ ─ ─ ─ ─
Group (Auto step mode) ─Use Not use ─Use Not use ─Use Not use ─Use Not use
Remote controller With With With With With With With Without With With Without With Without With With Without
System conguration *1 A F D A F D A B F D E A B F D E
No. Item Function name Description
1 IMOUC Intelligent multiple
outdoor unit control (IMOUC)
Interface system receives step request signal corre- spond to total capacity of outdoor units, and calculates necessary capacity for each outdoor unit automatically. (See "3. System".)
────────────────
2 Back up operation In case of one outdoor unit failure, next outdoor unit
starts to operate automatically. ────────────────
3 Rotation control To make cumulative operation time of each outdoor
unit even. (This function is only among same capacity outdoor units.)
────────────────
4 Delayed (balanced)
defrost
To avoid simultaneous defrosting among multiple out- door units as much as possible. *2 ─*2 ─ ─ *2 ─── *2 ──── *2 ─ ─
5 Output Pre-defrost signal This output becomes ON before defrost starts
(to switch ON back up heater on your side). *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2
6 Step
input
11-step control Rened capacity request in 11 steps becomes possible. ────────────────
7 Con-
nection
Modbus connection Modbus communication is available.
(Refer to the Modbus manual.) *3 *3 *3 *3 *3 *3
8 SD card slot Operation data logging is available. 9 Time stamp function by remote controller for SD card log
data is available. ─ ─ ─ ─
10 Other Auto heating/cool-
ing
Auto change over function between heating and cooling is available. ─── ─────
*1. As for system conguration, see the following page. *2. These functions are available ONLY with adaptable outdoor unit. Refer to "2.2 Connectable outdoor unit models". *3. Only reading is available.

8
4 Function - System list
Step mode Auto
Input type Analog / Remote switch
Target temp. Supply air (SA) Return air (RA)
No. of outdoor unit 1 2-5 1 2-5
Intelligent multiple outdoor unit control (IMOUC) ────
Group (Auto step mode) ─Use Not use ─Use Not use
Remote controller With Without With With Without With Without With With Without
System conguration *1 A B F D E A B F D E
No. Item Function name Description
1 IMOUC Intelligent multiple
outdoor unit control (IMOUC)
Interface system receives step request signal corre- spond to total capacity of outdoor units, and calculates necessary capacity for each outdoor unit automatically. (See "3. System".)
──────────
2 Back up operation In case of one outdoor unit failure, next outdoor unit
starts to operate automatically. ──────────
3 Rotation control To make cumulative operation time of each outdoor
unit even. (This function is only among same capacity outdoor units.)
──────────
4 Delayed (balanced)
defrost
To avoid simultaneous defrosting among multiple out- door units as much as possible. *2 ─ ─ *2 ──── *2 ─ ─
5 Output Pre-defrost signal This output becomes ON before defrost starts
(to switch ON back up heater on your side). *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2
6 Step
input
11-step control Rened capacity request in 11 steps becomes possible. ──────────
7 Con-
nection
Modbus connection Modbus communication is available.
(Refer to the Modbus manual.) *3 *3 *3 *3 *3 *3 *3 *3 *3 *3
8 SD card slot Operation data logging is available. 9 Time stamp function by remote controller for SD card log
data is available. ─ ─ ─ ─
10 Other Auto heating/cool-
ing
Auto change over function between heating and cooling is available. ──────────
*1. As for system conguration, see the following page. *2. These functions are available ONLY with adaptable outdoor unit. Refer to "2.2 Connectable outdoor unit models". *3. Only reading is available.

9
4 Function - System list
*1. Example of system conguration
System A
Outdoor unit Interface
Remote
controller
AHU local
controller
System B
Outdoor unit Interface AHU local
controller
System C (Manual step mode) (IMOUC)
Outdoor unit Interface
Remote
controller
AHU local
controller
Ref.address: 0
Ref.address: 1
Ref.address: 2
Outdoor unit
Outdoor unit
Interface
Interface
System D
Outdoor unit Interface
Remote
controller
AHU local
controller
Ref.address: 0
Ref.address: 0
Ref.address: 0
Outdoor unit
Outdoor unit
Interface
Interface
Remote
controller
Remote
controller
System E
Outdoor unit Interface
AHU local
controller
Ref.address: 0
Ref.address: 0
Ref.address: 0
Outdoor unit
Outdoor unit
Interface
Interface
System F (Auto step mode) (Gruop)
Outdoor unit Interface
Remote
controller
AHU local
controller
Ref.address: 0
Ref.address: 1
Ref.address: 2
Outdoor unit
Outdoor unit
Interface
Interface

10
5 Input and Output
5.1. Input and output
Inputs Availability
Thermistor
(Refrigerant)
Ref. liquid temperature (TH2)
2-phase temperature (TH5) *1
Thermistor
(Air)
Coil on temperature (TH11)
Target air temperature (TH1)
(Supply air or Return/Room air)
Input
(Contact signal)
Forced Comp. OFF*2
Fixed operation mode (Cooling/Heating)
Capacity request 7steps
Input for capacity request
(Analog signal)
0-10V 11steps
1-5V 7steps
4-20mA 7steps
0-10kΩ 7steps
Modbus connection
Remote controller
Outputs Availability
Output
(Contact signal)
Operation ON/OFF
Error
Compressor ON/OFF
Defrost
Cooling mode
Heating mode
Self protection*3
Pre-defrost*4 *5
*1. If connected outdoor unit is PUHZ-SHW model, it is not needed. (PUHZ-SHW models include high-pressure sensor instead.)
*2. The operation continues during defrosting operation.
The “Forced Comp. OFF” signal should not be turned ON frequently. It should only be used if an abnormality occurs.
*3. This output is ON when compressor becomes OFF to protect outdoor unit because condition is out of operation range.
(As for operation range, refer to "3.3 Operation range".)
*4. This output is ON more than one minute before defrost starts.
*5. This function is available ONLY with adaptable outdoor unit. Refer to "2.2 Connected outdoor unit models".
5.2. Requirements and guides regarding input, output, and settings
5.2.1 Requirements on capacity step input to the interface unit (Only manual step mode)
(1) Do NOT input STEP 0 for 3 minutes after compressor is ON. (Keep compressor ON for 3 minutes at least.)
(2) Regarding timing of capacity step changes, follow the note below.
Note: Input next capacity step input after supply air temperature becomes stable.
If this note is difcult to follow by local controller,
• The change must be within 5 steps in a single request with at least 5 minutes interval between every change.
• For 6 step changing or more (such as on start-up of operation), the interval between every change needs to be at least 10 minutes.
(See gure 5-1.)
Time
Capacity step request
1
5
6
8
11
0
5min
WITHIN
5steps
5min
5min
Capacity step request
10
11
0
10min
Time
(3) If you input capacity step request by analog signal, use the center value of each step.
(Regarding center values, refer to the section 4 "Electrical work" in the installation manual.)
<Fig. 5-1: Examples of step changes>

11
5 Input and Output
5.2.2 Requirements and guides regarding defrost and pre-defrost signal
(1) Do NOT input STEP 0 during defrost operation and while pre-defrost signal is ON.
(2) After pre-defrost signal becomes ON, do NOT change capacity step request until defrost operation nishes.
If you change capacity step after pre-defrost signal is ON, outdoor unit may stop starting defrosting and frost may become big.
(3) Pre-defrost signal becomes OFF before defrost operation nishes. Using both OUT4 (Defrost signal) and OUT8 (Pre-defrost signal) is recommended if
you use pre-defrost signal. (See gure 5-2.)
(4) Regarding the delayed (balaced) defrost function and the pre-defrost signal, if you change outdoor unit
from non-adaptable to adaptable model, initialization of the function setting on the remote controller is
necessary.
• First, select "Menu" → "Service" → "Check" → "Request code" on the remote controller.
• Second, set the refrigerant address of the outdoor unit which is changed from non-adaptable to
adaptable.
• Third, select "Request code" item with the F1 or F2 button and set "200" with F3 or F4 button.
• Then, press the button. The function settings are initialized.
Note: You have to set the function settings after this initialization, if necessary.
5.2.3 Requirement regarding operation mode setting
(1) Do NOT change operation mode frequently.
Heating operation Heating operationDefrost operation
More than
1 min
OUT8 (Pre-defrost signal) is ON
OUT4 (Defrost signal) is ON
Time
F1 F2 F3 F4
Request code
Request:
Ref.address
Request code
Cursor － ＋
0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
Temperature (:)
Resistance (k")
0°C 15 kΩ
10°C 9.6 kΩ
20°C 6.3 kΩ
25°C 5.2 kΩ
30°C 4.3 kΩ
40°C 3.0 kΩ
Thermistor R0 = 15kΩ± 3%
B constant = 3480 ± 2%
Rt = 15exp {3480 ( 273+t – 273 )}
1
1
5.2.4 Thermistor characteristics
• Target air temp. thermistor (TH1)
• Ref. liquid temp. thermistor (TH2)
• 2-Phase temp. thermistor (TH5)
• HEX inlet (Coil on) temp. thermistor (TH11)
5.2.5 Central control (M-NET connection)
The central control (M-NET converter and A-control sub Interface connection between outdoor unit(s) and MELANS/BMS ) is available ONLY when capacity
setting (DIP SW1 and SW6) is "No input (Auto step mode)" and return/room air temp. control is selected (DIP SW 1-7 is ON).
<Fig. 5-2>

12
5.3.2 Connection and setting when intelligent multiple outdoor unit control (IMOUC) is used
(1) When IMOUC is used, the following input connections to sub interface unit(s) are necessary.
Input Input to sub interface(s)
Thermistor Target air temp. (TH1) Input is not necessary because IMOUC is only in manual step mode.
Coil on air temp. (TH11) Input to sub interface(s) is necessary.
Liquid ref. temp. (TH2) Input to sub interface(s) is necessary.
2-phase ref. temp. (TH5) Input to sub interface(s) is necessary.*1
Input for capacity
request
Analog input (0-10V/1-5V/4-20mA/0-10kΩ) Input to sub interface(s) is not necessary.
Modbus Input to sub interface(s) is necessary only for monitoring sub interface(s).
Remote switch Input to sub interface(s) is not necessary.
Other inputs Forced compressor OFF (IN1) Input to sub interface(s) is necessary, if you use this function to sub interface(s).
Fixed operation mode (Cooling/Heating) (IN2) Input to sub interface(s) is not necessary.
Remote controller Daisy chain wiring among interfaces is necessary.
*1. It is not necessary if connected outdoor units are PUHZ-SHW models (which include high-pressure sensor).
(2) When IMOUC is used, the following output connections to sub interface unit(s) are necessary.
Output Output from sub interface(s)
1 Operation It can be monitored via main interface.
2 Error Output connection is necessary, if you monitor error information of sub interface(s).
3 Compressor ON Output connection is necessary, if you monitor this information of sub interface(s).
4 Defrost Output connection is necessary, if you monitor this information of sub interface(s).
5 Cooling mode It can be monitored via main interface.
6 Heating mode It can be monitored via main interface.
7 Self protection Output connection is necessary, if you monitor this information of sub interface(s).
8 Pre-defrost *1 Output connection is necessary, if you monitor this information of sub interface(s).
*1. This function is available ONLY with adaptable outdoor unit. See "2.2 Connectable outdoor unit models".
(3) When IMOUC is used, the following DIP switch settings of sub interface unit(s) are necessary.
DIP switch DIP switch setting of sub interface(s)
1-1 to 1-3 Input selection Setting of main interface is only necessary.
1-4 to 1-5 Thermistor (TH11, TH5) Setting of each sub interface(s) is necessary.
1-6 Time stamp for SD card Setting of each sub interface(s) is necessary, if you use this function.
1-7 Position of TH1 Setting is not necessary because IMOUC is manual step mode.
1-8 IMOUC Setting of each sub interface(s) is necessary.
2-1 to 2-2 Fixed operation mode Setting of main interface is only necessary, if you use this function.
2-3 to 2-5 Fixed set temp. Setting is not necessary because IMOUC is manual step mode.
2-7 to 2-8 Thermistor (TH2, TH1) Setting of each sub interface(s) is necessary.
3-1 to 3-3 LED display setting Setting of each sub interface(s) is necessary, if you use this function.
3-4 to 3-5 Thermo differential (Auto step mode) Setting is not necessary because IMOUC is manual step mode.
3-6 to 3-8 Baud rate of Modbus Setting of each sub interface(s) is necessary, if you use Modbus connection to sub interface(s).
4-1 to 4-8 Settings for Modbus Setting of each sub interface(s) is necessary, if you use Modbus connection to sub interface(s).
6-1 to 6-2 Input selection Setting of main interface is only necessary.
5.4 SD card data logging
5.4.1 Time stamp function
Time stamp function enables to log the time of operation. Please use this function.
To use this function, setting DIP SW (SW 1-6) of interface unit to ON, connecting remote controller, and clock setting of remote controller ("Menu" → "Initial
setting" → "Clock") are necessary.
5 Input and Output
5.3. Requirements and guides when intelligent multiple outdoor unit control (IMOUC) is used
5.3.1 Power input timing when intelligent multiple outdoor unit control (IMOUC) is used
When IMOUC is used, supply power to the rst interface unit, then the second interface unit within 1 minute. Otherwise system error will occur. (See gure 5-3.)
Remote
controller
AHU local
controller
power supply: ON
power supply: ON
power supply: ON
Interface
(Main)
Interface
(Sub)
Interface
(Sub)
OK
Remote
controller
AHU local
controller
power supply: ON
power supply: OFF
power supply: OFF
Interface
(Main)
Interface
(Sub)
Interface
(Sub)
NOT OK
<Fig. 5-3>

13
6 Requirement on local AHU design
6.1 Air ow volume
Standard air ow volume
Model capacity of outdoor unit ZRP 35 50 60 71 100 125 140 200 250
P – – – – – – – 200 250
SHW – – – 80 112 140 – 230 –
ZM 35 50 60 71 100 125 140 – –
Maximum air volume [m³/min] 12.3 18 21 24 33.6 42 48 67.2 81
[m³/h] 738 1080 1260 1440 2016 2520 2880 4032 4860
Minimum air volume [m³/min] 6.2 8.6 10.5 12.2 16.3 21.5 23.0 32.6 37.8
[m³/h] 372 516 630 732 978 1290 1380 1956 2268
Make sure to keep the air ow volume within the limits of maximum and minimum below.
(1) Maximum air volume
Step mode Number of
outdoor unit
Capacities of the
connected outdoor units Maximum air volume
Manual 2-6 The same [For PUHZ-ZRP, P, SHW models] 500% of selected outdoor unit's maximum standard air volume *1
[For PUZ-ZM models] 440% of selected outdoor unit's maximum standard air volume *2
Different [For PUHZ-ZRP, P, SHW models] If smaller capacity outdoor unit's rated heating capacity is under 20% of total
heating capacity, 500% of bigger capacity outdoor unit's maximum standard air volume is allowable.
If smaller capacity outdoor unit's rated heating capacity is 20% or more of total heating capacity, 500% of smaller
capacity outdoor unit's maximum standard air volume is allowable.
[For PUZ-ZM models] If smaller capacity outdoor unit's rated heating capacity is under 20% of total heating
capacity, 440% of bigger capacity outdoor unit's maximum standard air volume is allowable.
If smaller capacity outdoor unit's rated heating capacity is 20% or more of total heating capacity, 440% of smaller
capacity outdoor unit's maximum standard air volume is allowable.
1 – 200% of selected outdoor unit's maximum standard air volume
Auto 2-5 – [For PUHZ-ZRP, P, SHW models] 500% of the smallest capacity outdoor unit's maximum standard air volume
[For PUZ-ZM models] 440% of the smallest capacity outdoor unit's maximum standard air volume
1 – 200% of selected outdoor unit's maximum standard air volume
*1. 600% of selected outdoor unit's maximum standard air volume is available ONLY when 6 same capacity outdoor units are connected.
*2. 528% of selected outdoor unit's maximum standard air volume is available ONLY when 6 same capacity outdoor units are connected.
(2) Minimum air volume
Total amount of selected outdoor unit's minimum standard air volume is allowable.
When calculating capacity for designing AHU DX (Direct expansion) coil, refer to standard conditions below.
It is recommended to keep nominal capacity within 90%-110% under the standard condition.
[2] HEATING
Condensing temp. 45:
Superheat at condenser inlet 20:
Subcool at condenser outlet 5:
Coil on air temp. (dry-bulb/wet-bulb) 20:/15:
Outdoor temp. (dry-bulb/wet-bulb) 7:/6:
<Standard conditions>
[1] COOLING
Evaporation temp. 10:
Superheat at evaporator outlet 5:
Expansion valve inlet temp. 40:
Coil on air temp. (dry-bulb/wet-bulb) 27:/19:
Outdoor temp. (dry-bulb/wet-bulb) 35:/27:
<Nominal capacity>
Model capacity of outdoor unit ZRP 35 50 60 71 100 125 140 200 250
P– – – – – – – 200 250
SHW – – – 80 112 140 – 230 –
ZM 35 50 60 71 100 125 140 – –
COOLING (kW) 3.5 5.0 6.0 7.1 10.0 12.5 14.0 20.0 25.0
HEATING (kW) 4.1 6.0 7.0 8.0 11.2 14.0 16.0 22.4 27.0
6.2 Standard conditions

14
6 Requirement on local AHU design
HP 1 HP 2
Interlaced
OK
Air flow
Parallel
Air flow
HP 1 HP 2
OK
2 in series
Air flow
HP 1 2
OK
34
3 in series
Air flow
HP 1 2
NOT OK
3
6.3 Requirement on DX (Direct expansion) coil
(1) Heat exchanger volume of DX coil
Make sure to keep the DX coil capacity within the following range.
If the piping length is 30m or shorter, DX coil capacity can be increased as follows.
Model capacity of outdoor unit ZRP 35 50 60 71 100 125 140 200 250
P – – – – – – – 200 250
SHW – – – 80 112 140 – 230 –
ZM 35 50 60 71 100 125 140 – –
Max. volume [cm3]
Pipe length 30m - 1050 1500 1800 2130 3000 3750 4200 6000 7500
20m 1350 1800 2700 3030 3900 4650 5100 7800 9300
10m 1650 2100 3600 3930 4800 5550 6000 9600 11100
Min. volume [cm3] 350 500 600 710 1000 1250 1400 2000 2500
Note: Calculate them by linear interpolation in case of other piping lengths not shown on this table.
(2) Structure of DX coil
When multiple outdoor units are connected, basically select one interlaced DX coil which has multiple refrigerant circuit, or multiple coil placed in parallel to the
air ow. If multiple coils are placed in series with the air ow, maximum 2 coils in series are acceptable. (See gure 6-1.)
(3) Diameter of header
With a bigger size header, the refrigerant ow velocity decreases and this disturbs the sufcient circulation of refrigerant oil. As a result, the refrigerant oil
does not ow properly and could cause a serious damage of compressor.
Use the pipe whose outside diameter is less than the value shown in the table below.
Model capacity of outdoor unit ZRP 35 50 60 71 100 125 140 200 250
P – – – – – – – 200 250
SHW – – – 80 112 140 – 230 –
Max. diameter of header [mm] {19 {28
Model capacity of outdoor unit ZM 35 50 60 71 100 125 140
Max. diameter of header [mm] {14 {21
(4) Withstanding pressure
Design pressure of outdoor unit is 4.15 MPa. Following must be satised for burst pressure of connecting application.
Burst pressure : More than 12.45 MPa (3 times more than design pressure)
(5) Contamination maintenance
1. Wash the inside of heat exchanger to keep it clean. Be sure to rinse not to leave ux. Do not use chlorine detergent when washing.
2. Be sure that the amount of contamination per unit cubic content of heat transfer pipe is less than the following amount.
Example) In case of ø9.52mm
Residual water : 0.6 mg/m, Residual oil : 0.5 mg/m, Solid foreign object : 1.8 mg/m
6.4 Additional refrigerant charging amount
Regarding additional refrigerant charging amount of PUZ-ZM100, 125, 140 models, follow the table below.
For other models, see the installation manual of each outdoor unit.
Model Permitted pipe
length
Permitted vertical
difference
Additional refrigerant charging amount ◎Maximum
amount of
refrigerant
31 - 40m 41 - 50m 51 - 60m 61 - 70m 71 - 85m
ZM100 - 140 - 85m - 30m 0.5kg 1.0kg 1.5kg 2.0kg 2.8kg 6.8kg
<Fig. 6-1: Example of DX coil structure>

15
6.5 Thermistor position
< Target temp. thermistor (Locally supplied) >
Put thermistor where average supply or return air temperature can be detected.
Put thermistor where it does NOT pick up the temperature of DX coil.
< Liquid refrigerant pipe thermistor (TH2) >
Put thermistor where liquid refrigerant pipe temperature can be detected.
Protect the thermistor with heat insulating materials not to be affected by the ambient temperature, etc.
In case that the refrigerant is distributed by distributor, put thermistor before the distributor.
< 2-Phase temp. thermistor (TH5) >
Put thermistor where 2-Phase temperature can be detected on the DX coil pipe.
It should be located in the middle of inlet and outlet ports.
If there are some paths, locate it on the top of them.
Protect the thermistor with heat insulating materials not to be affected by the ambient temperature, etc.
< Target temp. thermistor (TH1) >
Put thermistor where average supply or return air temperature can be detected.
Put thermistor where it does NOT pick up the temperature of DX coil.
< Coil on temp. thermistor (TH11) >
Put thermistor where average air temperature of DX coil inlet can be detected.
Put thermistor where it does NOT pick up the temperature of DX coil.
TH5
TH5
Distributor
TH2
7 Additional Requirements for using R32 Refrigerant
7.1 Important Notice (Fire safety)
R32 is ammable refrigerant, and the re safety warranty for the whole system (including outdoor unit) must be done by your side. Conformity of regulations and
laws must be conrmed on the system by your side.
As a reference, the following section 7.3 and 7.4 describe outlines of IEC 60335 2-40 (Edition 6.0). However, if you follow this standard, make sure to read the
original IEC 60335. Also satisfying the following descriptions does NOT mean the guarantee of safety or the conformity with IEC 60335 2-40 (Edition 6.0).
7.2 Method to disable the compressor operation when using R32 refrigerant
If you need to disable the compressor operation as a measure to satisfy the re safety (e.g. in the case of refrigerant leakage), take the following method.
• Input STEP 0 when the manual step mode is selected.
• Turn ON IN1 (Forced Comp. OFF) after changing the operation mode to cooling, when the auto step mode is selected.
7.3 Outline of Annex GG Requirements (regarding Charge limits and Ventilation) for AHU connection
Requirements depend on the installation space of AHU and the size of each room.
• All spaces where R32 refrigerant reaches when the refrigerant leaks, shall be considered.
• Regarding room size restriction, see the Annex GG.2.1.
• When the system does not satisfy GG.2.1, measures according to Clause GG.8 or GG.9 shall be provided.
7.4 Other requirements
• Requirements for marking (e.g. ame symbol) and information in the manual shall be satised.
• Requirements for constructions (e.g. location of the refrigerant detection sensor) shall be satised.
6 Requirement on local AHU design

RG79F087H03
This product is designed and intended for use in the residential,
commercial and light-industrial environment.
HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN