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>