Toshiba TCB-LDS Series User manual

Page 1 of 2
PIN No.
1Power (V1)
Model Name 2Power (V2)
Mounting Method 3
Mounting Depth 4
Height 5
TCB-LDS1 TCB-LDS2 Width
VRF VRF Material
Refrigerant Leak Detector Refrigerant Leak Detector
Height mm 85 85
Width mm 85 85
Depth mm 32 32
Mounting Screw Pitch mm 60 60
Weight kg 0.085 0.085
Plastic Stainless Steel
White Stainless Steel
Recessed Recessed
Yes Yes
Audible Alarm Sound Level dB 85 (2300Hz ±300) 85 (2300Hz ±300)
Powered Off Powered Off
3 x Coloured LED 3 x Coloured LED
Yes (L30) Yes (L30)
Interconnecting Cable Max Length (Sensor to FCU) m10 10
Interconnecting Cable Type (Sensor to FCU)
mm20.75mm2Multi Core 0.75mm2Multi Core
Interconnecting Cable Max Length (Sensor to LD1) m50 50
Interconnecting Cable Type (Sensor to LD1)
mm20.75mm2Multi Core 0.75mm2Multi Core
12-24V AC/DC 12-24V AC/DC
Suggested Fuse Size Amps N/A N/A
Circuit Protection Fuse supplied With Cable mA 125 (Fuse supplied as part of Loom) 125 (Fuse supplied as part of Loom)
Yes Yes
Yes Yes
Recommended Mounting Height Above floor Level mm 150 ~ 250 150 ~ 250
Note:
In accordance with BS
EN 378:2016 the leak
detector MUST be
connected to a separate
power supply breaker
than that of the indoor
unit (FCU).
12 > 24v
AC / DC
Relay (NO)
Relay (C)
Relay (NC)
Usage
Colour
Model Name
Model Group
Function
Facia Plate Material
Cable Link For Remote On / OFF (Ving Card)
Fail Safe Relay Operation
Installation Type
Audible Alarm
Alarm Mute
Visual Indicator (Neon)
Fault Code generated to Local Remote Controller
Power Supply
The TCB-LDS1/2 is intended to be mounted within a single gang
back box, wall box. A minimum depth of 45mm is required to suite
all variants.
68.3mm
Metal
Plastic
86mm
47mm
Flush - Dry Lining
46mm
TCB-LDSBB1
68.3mm86mm
TCB-LDSBB2
Flush - Wall (concrete)
TCB-LDS Product Installation Manual
For Commercial Use
Refrigerants are significantly heavier than air. Therefore in order for the sensor to
operate as effective as possible the refrigerant detector must be positioned at a low
level inside the room, where the indoor air conditioning unit is fitted. See diagram
showing recommend installation guidelines.
The unit is designed to fit on the surface or over a standard single socket recessed
box. The refrigerant detector PCB can be accommodated inside a standard single
gang electrical back box (locally procured). The minimum depth of the back box is
dependent on the style of face plate, however all designs will fit inside a 47mm deep
enclosure , which can be flush mounted into the wall.
Distance – The detector is to be mounted a maximum of 10m from the indoor unit.
Low Level – As HFC refrigerants are heavier than air, the TCB-LDS should be
mounted as close as practical to floor level
(150mm ~ 250mm above floor level), preferably
directly below the air conditioning unit.
Accessible for Maintenance - The TCB-LDS should be mounted in a position where
it can be easily accessed for maintenance and repairs.
Minimize Damage - Mount the sensor in a position that minimizes the risk of
mechanical damage to the unit.
Minimize false alarms - Semi-conductor sensors can be ‘poisoned’ by contaminants
and after exposure may take considerable time to recover. Solvent paints and silicon
mastic are typical contaminants and exposure from these substances must be
avoided.
Ensure leaks can be detected – Do not mount the sensor next to doors or windows,
where fresh air may influence readings.
Sensor Operation Characteristics
Measure the Gv voltage on the testing connector (Pins 1 & 4),
as shown above.
Refer to the table below for the expected voltages.
Installation Location
Electrical Connections
PCB Layout (Front & Rear View)
Sensor Testing
Product Overview
Specification
Mounting Method
The leak detector is designed to shut down the air-conditioner in the event of a discharge of refrigerant into the detected space. In the event of the
leak detector operating there is visual and audible indication. The visual indication is via a flashing LED and the audible indication is via buzzer.
In accordance with BS EN 378:2016 The leak detector MUST be connected too a separate power supply breaker than that of the indoor unit
(FCU). The connection between sensor and indoor unit is completed via CN80 port on the indoor PCB
In the event of a leak the indoor unit will stop and a L30 fault code will be generated. This fault code will be displayed on the local remote controller
and the network based controls connected.
TCB-LDS1
TCB-LDS2
Installtion Height of Sensor from Floor
Typical Hotel Application
Operating
Condition
LED Status
Buzzer
Status
Gv
Volts Power Status Fault Code
Operating
Condition
L30
None
Thermal Off
Thermal On
9
Gas
concentration
level drops below
Level 1
(Sensor Reset)
Constant Green
Off
<2.0V DC
Power On
Power Off to On
L30
Thermal Off
8
Level 3
(4000ppm) Gas
Concentration
Level exceeded
(> 30 seconds)
Flashing Red/Amber (4
Hz)
Pulses
(4Hz)
Power On
L30
Thermal Off
>4.2v DC
7
Level 2
(1000ppm) Gas
Concentration
Level exceeded
(> 30 minutes)
Flashing Red/Amber (2
Hz)
Pulses
(2Hz)
>3.5V DC
Power On
None
Thermal On
6
Level 2
(1000ppm) Gas
Concentration
Level exceeded
(> 2 seconds)
Flashing Red (2 Hz)
Off
>3.5V DC
Power On
None
Thermal On
5
Level 1 (500ppm)
Gas
Concentration
Level exceeded
(> 2 seconds)
Flashing Green (2 Hz)
Off
>2.5V DC
Power On
None
Thermal On
4
Sensor Fault
(>180 seconds)
Flashing Red (1Hz) + one
(1) Amber flash per minute
Pulse 1 per
minute
<0.1V DC
Power On
L30
Thermal Off
3
Normal Operation
Constant Green
Off
<2.0V DC
Power On
None
None
2
Warm Up
(5 minutes)
Flashing Green/Red (1Hz)
Off
N/A
Power On
None
Thermal On
1
Power Off
Off
Off
N/A
Power Off
ItemNo.
LDS1/2 Sensor Status
CN80 Operation Pattern
FCU Status
Relay Status
1
3
3
4
5
NO
COM
NC
LDS1/2 Sensor
CN80 (FCU)
1
3
3
4
5
NO
COM
NC
LDS1/2 Sensor
CN80 (FCU)
1
3
3
4
5
NO
COM
NC
LDS1/2 Sensor
CN80 (FCU)
1
3
3
4
5
NO
COM
NC
LDS1/2 Sensor
CN80 (FCU)
1
3
3
4
5
NO
COM
NC
LDS1/2 Sensor
CN80 (FCU)
1
3
3
4
5
NO
COM
NC
LDS1/2 Sensor
CN80 (FCU)
1
3
3
4
5
NO
COM
NC
LDS1/2 Sensor
CN80 (FCU)
1
3
3
4
5
NO
COM
NC
LDS1/2 Sensor
CN80 (FCU)
1
3
3
4
5
NO
COM
NC
LDS1/2 Sensor
CN80 (FCU)
Example: LDS2 with LDSBB1

Page 2 of 2 REV. 02
BOX CONTENTS
TCB-LDS Product Installation Manual
For Commercial Use
• Ensure that all Local, National and International regulations are satisfied.
• Read this “PRECAUTIONS FOR SAFETY” carefully before installation.
• The precautions described below include the important items regarding safety. Observe them without fail.
• After the installation work, perform a trial operation to check for any problem.
• Read this Manual to explain how to use and maintain the unit.
• Turn off the main power supply switch (or breaker) before the unit maintenance.
• Ask the customer to keep this installation owner’s manual.
PRECAUTIONS FOR SAFETY
Wiring Schematic For FCU's Not Requiring Option Accessory TCB-PCUC2E
Wiring Schematic For FCU's Requiring Option Accessory TCB-PCUC2E
NOTES
1. To be EN378:2016 compliant, the leak detection sensor must be powered from a separate
power source to that of the FCU.
2. If EN378:2016 compliance is not required, it is possible to power the sensor direct from
CN61 of the indoor PCB, using the supplied wiring loom.
3. When using the External power supply option TCB-LD12V, please refer to
the installation diagram supplied with the product.
4. Power supply wire and interconnecting wires are procured locally.
5. Using the specified wires, ensure to connect the wires and fix wires securely, so
that the external tension to the wires does not affect the connecting part of the terminals.
Incomplete connection or fixation may cause a fire, etc.
6. Be sure to connect earth wire (grounding work) on indoor PCB. Incomplete grounding
causes an electric shock. Do not connect ground wires to gas pipes, water pipes, lightning
rods or ground wires for telephone wires.
7. Appliance shall be installed in accordance with national wiring regulations.
Capacity shortage of power circuit or incomplete installation may cause an electric shock
or a fire.
OPTIONAL VING CARD SETUP PROCEDURE
SWITCH TO POSITION -UNIT STARTS (e.g. KEY CARD INSERTED)
SWITCH TO POSITION -UNIT STOPS AND REMOTE CONTROLLER
ON/OFF FUNCTION IS LOCKED (e.g. CARD REMOVED)
NOTE: JUMPER 01 TO BE CUT ON INDOOR UNIT MAIN PCB BOARD
1
2
• PCB with mounted sensor
• White plastic or stainless steel facia depending on model purchased
• 1 x wiring loom for CN80 and CN61 connection (inc optional ving card connection)
• 1 x Installation manual (9 languages)
ASSOCIATED PART NUMBERS
1. TCB-LDS1 - Refrigerant leak detector with white plastic facia
2. TCB-LDS2 - Refrigerant Leak detector sensor with stainless steel facia
3. TCB-LDSBB1 - White, plastic dry lining box, for mounting the LDS1/2 into a dry line cavity wall.
4. TCB-LDSBB2 - Galvanised Steel Knockout Box, for mounting the LDS1/2 into a concrete wall.
5. TCB-PCUC2E - Application control kit
6. TCB-LD12V - 12V transformer supply
DISCLAIMER
Gases and vapours other than the target refrigerant gas, may cause semi-conductor sensors to
react. Sensors exposed to silicon fumes may be permanently damaged.