Mitsubishi Electronics PAC-YU25HT User Manual
GB
CN24
CN22
X
X
CN24
CN22
X
X
FS1
FS2
FS1
FS2
R
S
R
S
CN24
H2
88H
H1
88H
26H
88H
WT05383X01
Air-Conditioners For Building Application
External Heater Adapter
PAC-YU25HT
Installation Manual
R410A Series
This manual describes installation of the External Heater Adapter that connects to CITY MULTI air conditioner R410A series indoor unit. This
products is the special wiring parts to drive an electric heater with the air conditioner. Please refer to the technical manual for details. For your
safety, be sure to read firstly “ ” described below thoroughly and then install 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.
WARNING This symbol denotes what could lead to serious injury or death if your misuse the PAC-YU25HT.
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.
WARNING
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 instruction 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 technician, 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.
Stop the operation if any malfunction occurs.
If malfunction occurs (burning smell, etc.) stop the operation and turn off
the power supply. Contact your dealer or technical representative. 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 overheating.
If they are installed too closely and the indoor unit temperature exceeds
40 ˚C, 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 except this external heater adapter (PAC-YU25HT).
The use of any other type of cables may result in malfunctions or fire.
Do not build a heater into the indoor unit.
Doing so may result in fire.
CAUTION
Do not install in any place exposed to flammable gas leakage.
Flammable gases accumulated around the body of 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.
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.
2 Parts list
Check that the following parts are included in the package.
(1) External output cable (with a yellow connector) ............................. 2 in total
Two types of cables with different connectors are included.
(2) Panel heater connector ................................................................... 3 in total
11
1 White : 1
11
22
2 Green: 2 (2 types)
22
1
3 Connection to the Indoor Unit
CN24
CN22
X
X
CN24
CN22
X
X
FS1
FS2
FS1
FS2
R
S
R
S
CN24
H2
88H
H1
88H
26H
88H
Use the cables that fit the connectors on the indoor unit control board. The items listed in this parts list cannot be used with the following models.
• PMFY-BM
• PMFY-AM
(1) External output cable (with a yellow connector)
This cable is used to connect a relay circuit for an interlocked operation with either an electric or a panel heater. Connect the cable to
CN24 on the indoor unit control board.
(2) Panel heater connector (with a green connector)
This connector is used to perform an interlocked operation with a panel heater. Depending on the indoor unit control board specification,
connect the cable either to CN4Y or CN22 as appropriate.
4 Locally Procured Wiring
A basic connection method is shown below.
(1) PEFY-P-NMSU-E and other models
Remote control board Relay circuit
Electric Heater
power source
Electric Heater
or panel
heater
Adapter
Red 1
White 2
White 1
(applicable only when a panel
heater is connected)
3
Indoor unit
control board
YellowWhite
CN4Y
Dip switch SW3-2 “ON”
Outdoor unit
control board
• PUHY, PURY-PTGMU type Dip
switch SW5-2
“ON”
• PUHY, PURY-PYHMU type Dip
switch SW5-10
“ON”
• PUMY series Dip
switch SW4-4
“ON”
Preparations in the field
(2) PEFY-P-NMHU-E, PDFY-P-NMU-E and other models
Remote control board Relay circuit
Electric Heater
power source
Electric Heater
or panel
heater
Preparations in the field
Maximum cable length
is 10 m (32ft)
Adapter
Red 1
White 2
White 1
(applicable only when a panel
heater is connected)
Maximum cable length
is 10 m (32ft)
2
For relay X use the specifications given below Operation coil
Rated voltage : 12VDC
Power consumption : 0.9W or less
* Use the diode that is recommended by the relay manufacturer at both ends of the relay coil.
The length of the electrical wiring for the PAC-YU25HT is 2 meters (6-1/2 ft)
To extend this length, use sheathed 2-core cable.
Control cable type : CVV, CVS, CPEV or equivalent.
Cable size : 0.5 mm2 ~ 1.25 mm2 (16 to 22 AWG)
Don’t extend the cable more than 10 meters (32ft)
Recommended circuit
1-phase power
supply
Wiring diagram
208V, 230V/60Hz
Control board
Indoor unit
control board
YellowGreen
Dip switch SW3-2 “ON”
FS1, 2 ----- Thermal fuse
H1, H2 ----- Heater
26H --------- Overheat protection
88H --------- Electromagnetic contactor
thermostat
Outdoor unit
control board
• PUHY, PURY-PTGMU type Dip
switch SW5-2
“ON”
• PUHY, PURY-PYHMU type Dip
switch SW5-10
“ON”
• PUMY series Dip
switch SW4-4
“ON”
5 Wiring Restrictions
Keep the length of the cable connecting to the circuit board of the indoor unit shorter than 10 meters (32ft).
Longer than 10 meters (32ft) could cause improper operation.
Use a transit relay when extending wiring such as remote wiring.
2
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