CAUTION
1. This diagram shows the configuration of transmission wiring, and omits power supply wiring for clarity.
2. Establish one shield ground for M transmission wiring within the system.
3. The number of system controllers which may be supplied with power are found by multiplying the given number
by the appropriate capacity coefficient in the following table (decimal fractions are rounded up).
Capacity coefficient
System remote controller
Central controller
0.5
1
Example: The following applies for 2 system remote controllers and 1 central controller.
2
×
0.5 + 1
×
1 = 2
Number of system controllers which may be supplied with power
Number of central controllers
×
capacity coefficient
System remote controllers
×
capacity coefficient
4. The System Remote Controller can manage up to 50 air-conditioning or Lossnay units.
5. One system remote controller can control a maximum of 32 groups.
The range of controllable group numbers can be changed during the initial setting phase. The range is set at
the factory as Group 1 - 32.
If control of group numbers outside the factory-set range is desired, regardless of the master and slave set-
tings, the minimum group setting needs to be changed during the initial setting phase. Please refer to item
7-1-1 “Setting the number of the minimum management group” in the instruction book.
6. As current consumption is twice that with remote controller when this equipment is connected to indoor or
outdoor transmission wiring, assume two remote controllers for each of these units when calculating connec-
tions.
2
Confirming the Supplied Parts
Check that the box contains the following parts in addition to this manual:
(1) System remote controller (with upper and lower case) ......................................................................................... 1
(2) Cross recessed pan head screws (M4
×
30) ........................................................................................................... 2
(3) Wood screws (4.1
×
16, for directly hooking to the wall) ......................................................................................... 2
(4) Room label ............................................................................................................................................................ 1
(5) Caution label (in 10 languages) ............................................................................................................................. 1
(6) Instruction book ..................................................................................................................................................... 2
(7) Emergency stop input cable .................................................................................................................................. 1
NOTE: The remote controller cord is supplied on site.
Use a electric cable in accordance with the following specifications.
Electric cable specifications (CVV or CVVS)
With CVVS, be sure to insulate the cable shield so that it does not contact the terminal block.
The 1.25 mm
2
cable is for use as an extension.
• Up to 10 m ............. 0.75 mm
2
twin-core cable
• Longer than 10 m ... 1.25 mm
2
twin-core cable (extension cord)
[(2)10]
[(2)01]
[101]
[102]
[104]
[105]
[107]
[157]
[051]
TB7
TB3
[059]
TB7
TB3
[001]
TB5
[002]
TB5
[003]
TB5
[004]
TB5
[005]
TB5
[006]
TB5
[007]
TB5
[008]
TB5
[112]
[113]
[110]
[015]
[014]
[013]
[012]
TB5
[011]
TB5
[010]
TB5
[009]
TB5
(2) Attach the lower case to the wall or the switch box.
NOTE: Over-tightening the screws may result in deformation or cracking of the lower case.
Building Air Conditioning Control System
System Remote Controller
PAC-SF41SCA
Installation Manual
This manual describes only installation for the centralized controller (System Remote Controller PAC-SF41SCA), capable
of controlling up to 50 air-conditioning or Lossnay units (max. 32 groups). For information about how to wire and how to
install air conditioning units, see the installation manual for them.
For your safety, first be sure to read “ 1 Safety Precautions ” described below thoroughly and then install the System Remote
Controller PAC-SF41SCA correctly.
1
Safety Precautions
●
The following two symbols are used to denote dangers that may be caused by incorrect use and their degree:
WARNING
This symbol denotes what could lead to serious injury or death if you misuse the PAC-SF41SCA.
CAUTION
This symbol denotes what could lead to a personal injury or damage to your property if you misuse
the PAC-SF41SCA.
●
After reading this installation manual, keep it in a place where the final user can see it anytime he or she wants to it.
When someone moves, repairs or uses the PAC-SF41SCA, make sure that this manual is forwarded to the final user.
WARNING
WT02979X01
GB
3
System Configuration
M-NET model address setup (address duplication not possible)
Address setup
Address
Indoor unit / Interlocked unit
Any address within the range specified at right.
1~50
Outdoor unit
The smallest address of indoor unit in the same refrigerant
50
51~100
Remote controller
The smallest address of indoor unit in the same group +100
101~200
System remote controller
Any address within the range specified at right.
201~250
Central management transmission line
Indoor and outdoor transmission line
Interlocked operation with ventilation unit
Power supply unit
Model: PAC-SC34KUA
M-NET remote controller
Indoor unit
Outdoor unit
Group 12
Group 13
Group 1
Group 2
Group 3
Group 4
Group 5
Group 6
Group 7
Central controller
Model: MJ-103MTRA
The place of 100
is fixed to “2”.
Note the following when connecting to central management transmission line (Caution 3)
Number of system controllers per system which may
Power supply unit model
be supplied with power
1~5
PAC-SC34KUA
4
How To Install
(1) Choose a location in which to install the system remote controller (switch box) in accordance with
the following requirements:
1
The space as shown in the diagram at right is required
whether the controller is installed on the wall or in the
switch box (except when used with the program timer
(PAC-SC32PTA)).
2
Procure the following parts locally.
Switch box for two units
Thin-copper wiring pipe
Locknut and bushing
Extra space around
remote controller
External size of
remote controller
30
46
30
30
120
83.5
±
0.4
Installation pitch
Remote controller cord
(see (3) below)
Wood screws
Connect this to CN1
on upper case (see
(6)).
Switch box
Connect this to CN1
on upper case
(see (6)).
Seal this remote controller cord lead-in with putty or silicon rubber.
(see (9))
Cross recessed
pan head screws
Remote controller cord
(see (3) below)
B. 2
A. 1
No polarity
Remote controller cord procured locally.
Terminal block
(3) Connect the remote controller cord to the terminal block on the lower case.
Install wiring correctly in accordance with the diagram at right.
System remote controller upper case
CAUTION Addresses between 201 and 250 may be set with the system remote controller. The place of 100
is fixed to “2”.
Rotary switch setting
Address
01~50
201~250
• If an address other than those listed above is set, an address setting error occurs and “AdE” is displayed.
• The rotary switch is set to 01 when shipped from the factory.
Example : Address 208
×
10
×
1
Rotary switch
(4) Set the system remote controller address with the rotary switches.
(5) When used in conjunction with the master system controller (centralized controller), set the system
remote controller to “Slave” with the switch as shown in the diagram below.
• The switch is set to “Master” when shipped from the factory.
System remote controller upper case
(6) Connect this connector on the lower case to the connector CN1 on the upper case.
CAUTION • Connect firmly as shown below. The system will not operate unless these connections are
made.
• After connecting the wiring, ensure that the upper case does not hang off the cord as shown in
the diagram below at the right. This may result in a break in the cord, and thus cause problems
with operation.
• Always pass the cord through the hook to hold it in place.
Hook
Remote controller lower case
Connect this to
connector CN1
Connector CN1
Remote controller upper case
(7) Fitting the upper case.
First hook the upper case to the two upper claws and then fit it
as shown at right.
CAUTION
• Press the case until it snaps shut.
• A protective sheet has been affixed to the control panel.
Remove it before starting.
To remove the upper case, insert a minus screwdriver into one
of the open slots and move it in the direction of the arrow as
shown in the diagram at right.
CAUTION
Do not turn the screwdriver while it is inserted into the open
slot. Doing so can result in damage to the claws.
(8) Wiring hole for fitting directly onto the wall.
• Cut out the thin-wall portion of the upper case (shaded area) using
a knife or nipper.
• Take out the remote controller cord connected to the terminal block
via this portion.
When Using the Switch Box
Wiring pipe
Wall
Bushing
Remote controller cords
Lock nut
Switch box
Seal with putty
Remote controller cord
Seal with putty
Seal with putty
Cord Taken Through Top of
Remote Controller
Cord Taken Through Rear of
Remote Controller
(10) Affix a caution label.
A caution label in English is supplied on the back surface of the upper panel. Affix another caution label in the lan-
guage of a country where you use the System remote controller over the English one.
5
Connecting Optional parts
(1) Program timer
• When connecting a program timer connect a 5-core cable to connector
CN2 (timer connector) on the upper case (a 5-core cable is supplied with
the program timer).
• Cut out the thin-wall portion to take the cable.
• When fitting directly onto the wall, fit the system remote controller on the
left of the program timer to facilitate wiring. If you anticipate installing more
program timers, leave the appropriate space to the left of the remote con-
troller. See the program timer installation manual for installation details.
(2) Emergency stop input
• In case of an emergency, the entire air conditioning system and all controller operations can be stopped using the
CN2 (timer connector) connected to the program timer. This function is only enabled when the this unit is in master
settings mode. Please do not connect the emergency stop input during slave settings mode. (The CN2 links to the
program timer connector, thus it can be connected to either the program timer or the emergency stop input.)
• When using the emergency stop input, use the cable (Emergency stop input cable) which is included with the unit.
• Connecting the CN2 to the emergency stop input is the same as attaching it to the program timer. See (1) Program
timer above.
• Initial settings are necessary when using the emergency stop input. Please refer to 7-3 “Emergency stop mode
settings” in the instruction book.
• External Input Specifications
1
Input signal (Level signal)
2
Suggested circuit example
6
Initial Settings
• Initial settings is necessary before test run. Consult the user’s manual for details of initial settings.
7
Test Run
• Please perform a trial run of each air conditioning unit with the local remote controller.
Upper case
Group 11
Group 10
Master
Slave
System remote controller
Ventilation unit
(9) Seal the remote controller cord lead-in with putty in order to prevent possible entry of dew, water
droplets and other insects.
• When fitting directly to the wall as in (2), seal the cut-
out in the upper case with putty.
• When cutting a hole in the wall for the remote con-
troller cord (ie when the remote controller cord exits
from the rear of the remote controller), seal this hole
in the same way.
• When fitting to the switch box, seal the join between
the switch box and the wiring conduit with putty.
When Fitting Directly on the Wall
Connection ON
Connection OFF
Operating
Emergency stop
Operating
CN2
X1
X1
1
2
3
4
5
Connector CN2
Thin-wall portion
Emergency
stop
Maximum distance 10 m
Main unit
Use a maximum of 1.25 mm
2
cable for remote controller
wiring. 0.75 mm
2
cable is recommended for ease of use.
Lower case
• No-voltage connectors and extension cables should be arranged on-site.
No-voltage connector specifications: Use a miniature array for signal switching (smallest suitable load: DC5V -
1 mA).
• Do not use a connector cable over 10 m long. (use 0.3 mm
2
or larger wires)
• Always connect the emergency stop input with the power to the main unit turned off.
NOTE: The only indoor unit this device can be used to operate is an M-NET control indoor unit. It will not
operate a K control indoor unit, even with a K transmission converter (PAC-SC25KAA).
NOTE: Please keep LVD. LVD;Low Voltage Directive (EC Directive of Europe) Apply some countermeasure
for wiring and relay not to be touched from outside.
1
Wiring should be covered by the insulation tube.
2
Use relay with EU regulation.
When Installing Directly on the Wall
When Installing the Switch Box
Do not install in any place where acidic or alkaline solu-
tion or special spray are often used.
Doing so may cause an electric shock or malfunction.
Use standard wires in compliance with the current ca-
pacity.
A failure to this may result in an electric leakage, heating or
fire.
Do not touch any PCB (Printed Circuit Board) with your
hands or with tools. Do not allow dust to collect on the
PCB.
Doing so may cause fire or an electric shock.
Do not remove the insulation sheet on the PCB.
Doing so may cause an electric shock.
Do not touch any control button with your wet hands.
Doing so may cause an electric shock or a malfunction.
Do not press any control button using a sharp object.
Doing so may cause an electric shock or a malfunction.
Never contact the power supply with the control wiring
terminals.
Doing so will certainly cause the controller to catch fire.
Do not install in any place exposed to flammable gas
leakage.
Flammable gases accumulated around the body of PAC-
SF41SCA 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 sig-
nificantly or give damage to the component parts.
Wire so that it does not receive any tension.
Tension may cause wire breakage, heating or fire.
Completely seal the wire lead-in port with putty etc.
Any dew, moisture, insects entering the unit may cause an
electric shock or a malfunction.
Do not wash with water.
Doing so may cause an electric shock or a malfunction.
Do not install in any place at a temperature of more than
40°C or less than 0°C or exposed to direct sunlight.
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 a malfunction.
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.
Install in a place which is strong enough to withstand
the weight of the PAC-SF41SCA.
Any lack of strength may cause the PAC-SF41SCA to fall
down, resulting in personal injury.
Firmly connect the wiring using the specified cables.
Carefully check that the cables do not exert any force
on the terminals.
Improper wiring connections may produce heat and possi-
bly a fire.
Never modify or repair the PAC-SF41SCA by yourself.
Any deficiency caused by your modification or repair may
result in an electric shock or fire.
Consult with your dealer about repairs.
Ensure that installation work is done correctly follow-
ing this installation manual.
Any deficiency caused by installation may result in an elec-
tric shock or fire.
All electrical work must be performed by a licensed tech-
nician, according to local regulations and the instruc-
tions given in this manual.
Any lack of electric circuit or any deficiency caused by in-
stallation may result in an electric shock or fire.
Do not move and re-install the PAC-SF41SCA yourself.
Any deficiency caused by installation may result in an elec-
tric shock or fire.
Ask your distributor or special vendor for moving and instal-
lation.
To dispose of this product, consult your dealer.
CAUTION
