Mitsubishi Electric PAC-YU25HT Manuel D'installation

GB WT05383X05
Air-Conditioners For Building Application
External Heater Adapter
PAC-YU25HT
Installation Manual
This manual describes installation of the PAC-YU25HT that connects to CITY MULTI R410A series indoor units. This product is the special
adapter necessary to operate an electric heater with the air conditioner. Please refer to the technical manual for further details. For your safety,
be sure to read " " described below thoroughly before installing the PAC-YU25HT.
1 Safety Precaution
1 Safety Precaution
● The following two symbols are used to denote dangers that may be caused by incorrect use.
This symbol denotes what could lead to serious injury or death if your misuse the PAC-YU25HT.
WARNING
CAUTION This symbol denotes what could lead to a personal injury or property damage if you misuse the PAC-YU25HT.
● After reading this instruction manual, keep it in a place where the end user can find it anytime he or she wants to it. When someone moves,
repairs or uses the PAC-YU25HT, make sure that this manual is forwarded to the final user.
Ask your dealer or technical representative to install the unit.
Any deficiency caused by your own installation may result in an
electric shock or fire.
Ensure that installation work is done correctly following this
installation manual.
Any deficiency caused by installation may result in an electric
shock or fire.
Firmly connect the wiring using the specified cables.
Carefully check that the cables do not exert any forces on the
terminals.
Improper wiring connections may produce heat and possibly a
fire.
Never modify or repair the PAC-YU25HT.
Any deficiency caused by your modification or repair may result in
an electric shock or fire.
Consult with your dealer about repair.
All electrical work must be performed by a licenced techni-
cian, according to local regulations and the instructions
given in this manual.
Any lack of electric circuit or any deficiency caused by installation
may result in an electric shock or fire.
Do not move and re-install the PAC-YU25HT yourself.
Any deficiency caused by installation may result in an electric
shock or fire.
Ask your distributor or special vendor for moving and installation.
Do not install in any place exposed to flammable gas leakage.
Flammable gases accumulated around the body of above PAC-
YU25HT may cause an explosion.
Do not use in any special environment.
Using in any place exposed to oil (inculuding machine oil), steam
and sulfuric gas may deteriorate the performance significantly or
give damage to the component parts.
Wire so that it does not receive any tension.
Tension may cause wire breakage, heating or fire.
4 Field-supplied Wiring
(1) Basic wiring
Remote control board Relay circuit
+
X
–
X
Electric Heater
On-site preparation
Use X relay having the following specifications
Rated voltage : 12VDC
Power consumption : 0.9W or less
* Always insert a diode on both ends the relay coil.
The length of the electrical wiring for the PAC-YU25HT is 2 meters (6-1/2 ft).
For longer lengths, up to no more than 10 m (32ft), use sheathed 2-core cable.
Control cable type : CVV, CVS, CPEV or equivalent.
Cable size : 0.5 mm 2 ~ 1.25 mm 2 (16 to 22 AWG)
(2) Recommended circuit
FS1
R
1-phase power
S
supply
FS2
X
FS1
R
208V, 230V/60Hz
S
FS2
X
X
Control board
CN24
5
Wiring Restrictions
The length of cable connecting the heater adapter to the circuit board of the indoor unit must be no more than 10 meters (32ft).
Any cable longer than 10 meters (32ft) could cause improper operation.
Use a transit relay when extending the wiring.
6
Control specifications and DIP Switch settings
The models below have different control, please refer to each service manual for details.
Ducted unit : PEFY-P-NMAU-E*, PEFY-P-NMSU-E*, PVFY-P-NAMU-E*
Non ducted unit : PLFY-P-NFMU-E*, PLFY-EP-NEMU-E, PKFY-P-NLMU-E*
* Table 1 shows how the field-installed heater is controlled. Select the desired operation in the table below, and set the DIP S/W on the outdoor
and indoor units as shown in Table 1. Table 2 shows Heater Control patterns #A and B.
Table.1
Outdoor unit setting Condition of outdoor unit
DIP S/W OFF Applies to ALL Condenser unit models.
*4
N/A
DIP S/W ON
Applies to ONLY Air Cooled Condenser
*4
unit models that have OA sensor.
Normal drive
Defrost drive
H/P drive
H/P stop
Outdoor temp.
a b c d
Parameters a/b/c/d are set by
Maintenance Tool.
*1 DIP S/W3-4 setting on NON ducted unit is used for Vane Control function. DIP S/W3-4 setting is not required.
*2 For ducted units when S/W3-4 is ON, heater is ON in defrost mode.
R410A Series
WARNING
Cease operation if malfunction occurs.
If malfunction occurs (burning smell, etc.) stop the operation and
turn off the power supply. Contact your dealer or technical repre-
sentative. If the controller continues to operate after a malfunction
occurs, this may cause damage, electric shock or fire.
Do not turn on the main power until installation has been
completed.
Doing so may result in electric shock or fire.
Leave sufficient space between heater and indoor unit to
allow for air movement to prevent the indoor unit from over-
heating.
If they are installed too closely and the indoor unit temperature
exceeds 40 ˚C (104˚F), malfunctions or fire may result.
Keep the heater clean to keep the indoor unit from sucking in
accumulated dust on the heater.
Dust particles that enter the indoor unit may cause fire.
When air conditioner and heater are configured to perform an
interlocked operation, do not use any other type of cables.
The use of any other type of cables may result in malfunctions or
fire.
Do not install a heater inside the indoor unit.
Doing so may result in fire.
CAUTION
Do not install in any place where acidic or alkaline solution or
special spray are often used.
Doing so may cause an electric shock or malfunction.
Do not install in any steamy place such a bathroom or
kitchen.
Avoid any place where moisture is condensed into dew.
Doing so may cause an electric shock or malfunction.
Do not wash with water.
Doing so may cause an electric shock or malfunction.
Do not install in any place at a temperature of more than 40˚C
(104˚F) or less than 0˚C (32˚F) or exposed to direct sunlight.
Indoor unit Outdoor unit
Adapter control board control board
Each outdoor unit has
External output cable 12VDC
function code of heating
CN24
Red 1
backup.
Please refer to each
White 2
service manual (DIP S/W
CN22/CN4Y
Functions).
White 1
White 2/3
Fan control connector 5VDC
Maximum cable length is
10 m (32 ft)
H1
FS1, 2 ------Thermal fuse
H2 H1, H2 ------Electric heater
26H----------Overheat protection thermostat
X -------------Relay (Electromagnetic contactor)
26H
Ducted unit NON ducted unit
Heater control #A
DIP S/W3-4
(defrost/error:
OFF (Indoor unit)
Heater control #A
Heater OFF)
(defrost/error:
Heater control #A
Heater ON)*1
DIP S/W3-4
(defrost/error:
ON (Indoor unit)*2
Heater ON)
Normal
Heater OFF Heater OFF
drive
Heater control #A
DIP S/W3-4
(defrost/error:
OFF (Indoor unit)
Heater OFF)
Defrost
Heater control #B
drive
(defrost/error:
H/P drive
Heater control #B
Heater ON)*1
DIP S/W3-4
H/P stop
(defrost/error:
ON (Indoor unit)*2
Heater ON)
2 Parts list
This Installation Manual and the parts listed below are included with the PAC-YU25HT.
(1) External output cable .................................................................................... 2 cables total
1 CN24 without lock mechanism (Yellow) : 1
(Yellow)
(2) Fan control connector ............................................................................ 3 connectors total
1 CN22 without lock mechanism (Green) : 1
3 Connecting to the Indoor Unit
Use the chart below to see which external output cable and fan control connector is compatible with each indoor unit.
(1) External output cable
Use these cables to connect the unit with a relay for interlocked heater operation.
Connect to CN24 on the indoor unit.
(2) Fan control connector
These connectors are for exclusive use with ducted units and are used to stop the indoor unit fan when interlocking with the heater.
Select one of the connectors according to the unit model, and connect to CN22 or CN4Y.
Compatibility chart
Model
Ducted unit PEFY-P-NMAU-E*
PEFY-P-NMSU-E*
PEFY-P-NMHU-E*
PEFY-P-NMHSU-E
PFFY-P-NEMU-E
PFFY-P-NRMU-E
PVFY-P-NAMU-E*
Non PLFY-P-NFMU-E*
ducted unit
PLFY-EP-NEMU-E*
PMFY-P-NBMU-E
PCFY-P-NKMU-E
PKFY-P-NLMU-E*
PKFY-P-NKMU-E
1
*3 Heater On signal can not be output in the following cases for safety reasons.
- Return air temperature sensor fault (Error code: 5101)
- Indoor unit fan operation error (Error code: 4109)
- Transmission error (Error code: 6***, 7***)
- When heating mode is prohibited
- When demand control or capacity save is set to 0%
- During refrigerant recovery mode on PUMY system
- For a few minutes when change from thermo OFF to ON or ON to OFF in R2/WR2 system
*4 Please set function codes that are shown on outdoor unit service manuals (DIP S/W Functions).
Table.2
Heater OFF Inlet air temp.
Heater control #A
Heater ON Inlet air temp. < set temp. -4˚F (2˚C)
Inlet air temp.
Heater output
ON
OFF
Note:
<For heater>
The value "4˚F (2˚C)" is modifiable from 1.8˚F (1˚C) to 9˚F (5˚C) by maintenance tool.
Note:
(1) On the ducted model units (except the Fresh air intake type), turning on the heater with the fan setting set to OFF requires that the DIP S/W
and connectors on the indoor units*1 are set on site.
*1: DIP SW3-4, CN24, and CN4Y (or CN22)
Table.3 Fan control in defrost
Pattern
CN4Y or CN22 for FAN control (YU25)
1
Unplugged
2
3
Plugged
4
Table.4 Fan speed setting in defrost
SW3-1 SW1-7 SW1-8
OFF OFF OFF
OFF ON OFF
OFF OFF ON
OFF ON ON Stop (Remote controller setting *2)
ON ON ON Stop (Remote controller setting *2)
<Image>
CN4Y or CN22
(2) On the Fresh air intake type units, the heater cannot be turned on when the fan setting set to OFF.
(3) Non-ducted models do not require the settings as described in Section (1) above.
● Reference (not applicable to the ducted models)
Pattern
CN4Y or CN22 for FAN control (YU25)
1 N/A
(4) Back-up heating will not operate when the heater turns on during demand control.
(5) This is applicable only to the R410A series. Make the settings for the dip switches on the outdoor unit control board before turning on the
power. Dip switch setting is shown on outdoor unit service manuals (DIP S/W Functions).
HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
3
2 CN24 with lock mechanism (Yellow/Orange) : 1
(Yellow/Orange)
2 CN22 with lock mechanism (Green) : 1 3 CN4Y (White) : 1
Parts
(1) External output cable (2) Fan control connector (for use with ducted models only)
1 CN24 without 2 CN24 with lock 1 CN22 without 2 CN22 with lock
lock mechanism mechanism lock mechanism mechanism
set temp. Heater OFF Inlet air temp.
Heater control #B
Heater ON Inlet air temp. < set temp. -1.8˚F (1˚C)
Set temp.
(Room temperature setting)
Set temp. -1.8˚F (1˚C)
Inlet air temp.
Set temp. -4˚F (2˚C)
Heater output
The heater operation interlocks with the Thermo-ON/OFF mode on the
indoor units.
Ducted unit
DIP S/W3-4 (Indoor unit) Fan speed in defrost (Heater)
OFF Stop
ON See Table.4
OFF Stop
ON Stop
Fan speed *1
Very low *1: The fan operates at the same speed settings as
shown in this table during the Heating Thermo-OFF
Low
mode.
Remote controller setting
*2: If Pattern 2 in the table above is selected for fan
control, the fan will follow the remote controller set-
ting.
Indoor unit Control board
CN24
NON ducted unit
DIP S/W (Indoor unit) Fan in defrost
N/A Stop (Heater ON)
3 CN4Y
2
set temp.
Set temp.
(Room temperature setting)
Set temp. -1.8˚F (1˚C)
ON
OFF
(Heater OFF)
(Heater ON)
(Heater OFF)
(Heater ON)
4