Mitsubishi Electric PAC-SC36NA-E Installation Manual

WT04936X02
GB
Air-Conditioners For Building Application
Remote ON/OFF <input> signal adapter
Installation Manual
This installation manual describes only the connection of the Remote ON/OFF <output> signal adapter to the outdoor unit of CITY
MULTI air conditioner series.
This part is a wiring member to connect the external circuit (locally procured) to the board on the outdoor unit. Depending on the
connection, Demand, Night mode, Snow sensor etc. can be controlled.
For details of compatible models, connection method and setting method, refer to the CITY MULTI DATA BOOK, Electrical Wiring
Diagram etc.
For your safety, be sure to read firstly " 1 Safety Precaution " described below thoroughly and then install the PAC-SC36NA-E.
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-SC36NA-E.
CAUTION
This symbol denotes what could lead to a personal injury or property damage if you misuse the PAC-SC36NA-E.
● 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-SC36NA-E, 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 elec-
tric 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-SC36NA-E.
Any deficiency caused by your modification or repair may result in
an electric shock or fire. Consult with your dealer about repair.
■ Do not install in any place exposed to flammable gas leakage.
Flammable gases accumulated around the body of PAC-SC36NA-E
may cause an explosion.
■ Do not use in any special environment.
Using in any place exposed to oil (including 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 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

Make sure that the following items are included in the package.
• Remote ON/OFF <input> signal adapter 3 m (9-3/4 ft) ........... 1 pcs.
3 Connection to the Outdoor Unit
Connect the connector side of the Remote ON/OFF <input> signal adapter to the connector CN3D, CN3N and CN3S of the outdoor unit
control board as necessary. The connector can only be connected in one direction only. Do not force the connection.
PAC-SC36NA-E
WARNING
■ All electrical work must be performed by a licensed 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-SC36NA-E 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 represen-
tative. If the controller continues to operate after a malfunction oc-
curs, this may cause damage, electric shock or fire.
■ Do not turn on the main power until installation has been com-
pleted.
Doing so may result in electric shock or 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.
■ Use standard wires in compliance with the current capacity.
A failure to this may result in an electric leakage, heating or fire.
■ Do not wash with water.
Doing so may cause an electric shock or malfunction.
4

Locally Procured Parts

All parts other than the Remote ON/OFF <input> signal adapter (PAC-SC36NA-E) are procured locally.
The items required will depend on the connection method. Refer to the example of use shown below.
(Example)
1 External timer ....... No voltage contact out put timer (with separate circuits for power supply and switch).
2 Switch ................... Single pole, single action swich.
CAUTION: Choose the parts for the contact for minute electric current.
The timer and the contact of the switch will require degrees of 5 VDC, 12 V or 1 mA load. Choosing the wrong parts may cause
stoppage of the adapter.
3 Transit relay .......... When the wiring work as described in 6. Wiring Restrictions is required, this relay is used.
4 Control cable ........ The length of the electrical wiring for the PAC-SC37SA is 3 meters (9-3/4 ft).
To extend this length, use sheathed 2-core cable
Control cable type: CVV, CVS, CPEV or equivalent
Cable size: 0.5 mm
Don't extend the cable more than 10 meters (32 ft).
CAUTION:
1. Wiring should be covered by insulation tube with supplementary insulation.
2. Use relays or switches with IEC or equivalent standard.
3. The electric strength between accessible parts and control circuit should have 2750 V or more.
5 Locally Procured Wiring
Basic connection methods for following models are shown below as examples.
For details and the connection method with another models, refer to the CITY MULTI DATA BOOK, Electrical Wiring Diagram etc.
(1) Y, HP, R2 series
1 Step demand (CN3D + DipSW4-4 ON)
Power supply
of relay
X Y
SW1 SW2
Preparations in the field
2 Demand and Low noise mode (CN3D + DipSW4-4 OFF)
Power supply
of relay
X Y
SW2
SW1
Preparations in the field
3 Low noise mode (CN3D + DipSW4-4 OFF)
Insulate this point securely as
this is not used.
Orange
Power supply
of relay
X X
Brown
Red
SW1
Preparations in the field
1
2 ~ 1.25 mm 2 (16 to 22 AWG)
Outdoor unit
X, Y: Relay (Point of contact rating: DC1 mA)
Adapter
control board
Orange
CN3D
1
OPEN
X Brown 2
Y (SW2)
3 SHORT
Red
Y
* They are rough values.
* Refer to the CITY MULTI DATA BOOK,
Electrical Wiring Diagrams, and other rel-
evant documents for information on the
Maximum cable
length is 10 m
"8 levels of on-DEMAND" and "12 levels
of on-DEMAND."
Outdoor unit
Adapter
X, Y: Relay (Point of contact rating: DC1 mA)
control board
Orange
CN3D
Low noise mode
X (SW1)
1
ON/OFF
X Brown 2
OPEN OFF
3
SHORT ON
Y Red
Maximum cable
length is 10 m
X: Relay (Point of contact rating: DC1 mA)
Outdoor unit
Adapter X (SW1) Low noise mode
control board
OPEN OFF
CN3D
SHORT ON
1
2
DipSW5-5 OFF: Ability main
3
The sound pressure level is reduced by
limiting the maximum fan frequency un-
der the following condition.
Cooling mode: outdoor temp. (TH6) < 30 °C
Heating mode: outdoor temp. (TH6) > 3 °C
Maximum cable
length is 10 m
DipSW5-5 ON: Low noise main
X (SW1)
OPEN SHORT
100 % (No Demand) 75 %
0 % 50 %
2-level of
Y (SW2)
on-Demand
OPEN 100 % (No Demand)
SHORT 0 %
2