Toshiba TCB-LDS Series Installation Manual

TCB-LDS Product Installation Manual
Product Overview
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.
Specification
Model Name
Model Group
Function
Height mm
Width mm
Depth mm
Mounting Screw Pitch mm
Weight kg
Facia Plate Material
Colour
Installation Type
Audible Alarm
Audible Alarm Sound Level dB
Alarm Mute
Visual Indicator (Neon)
Fault Code generated to Local Remote Controller
Interconnecting Cable Max Length (Sensor to FCU) m
2
Interconnecting Cable Type (Sensor to FCU)
mm
Interconnecting Cable Max Length (Sensor to LD1) m
2
Interconnecting Cable Type (Sensor to LD1) mm
Power Supply
Suggested Fuse Size Amps
Circuit Protection Fuse supplied With Cable mA
Cable Link For Remote On / OFF (Ving Card)
Fail Safe Relay Operation
Recommended Mounting Height Above floor Level mm
Installation Location
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.
For Commercial Use
TCB-LDS1 TCB-LDS2
VRF VRF
Refrigerant Leak Detector Refrigerant Leak Detector
85 85
85 85
32 32
60 60
0.085 0.085
Plastic Stainless Steel
White Stainless Steel
Recessed Recessed
Yes Yes
85 (2300Hz ±300) 85 (2300Hz ±300)
Powered Off Powered Off
3 x Coloured LED 3 x Coloured LED
Yes (L30) Yes (L30)
10 10
2 2
0.75mm Multi Core 0.75mm Multi Core
50 50
2 2
0.75mm Multi Core 0.75mm Multi Core
12-24V AC/DC 12-24V AC/DC
N/A N/A
125 (Fuse supplied as part of Loom) 125 (Fuse supplied as part of Loom)
Yes Yes
Yes Yes
150 ~ 250 150 ~ 250
Typical Hotel Application
Installtion Height of Sensor from Floor
Mounting Method
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.
Model Name TCB-LDSBB1
Mounting Method Flush - Dry Lining
Mounting Depth 46mm
86mm
Height
TCB-LDS1
Width 86mm
Material Plastic
TCB-LDS2
Example: LDS2 with LDSBB1
Sensor Operation Characteristics
LDS1/2 Sensor Status
Item No.
Operating
LED Status
Condition
1 Power Off Off
Warm Up
2 Flashing Green/Red (1Hz)
(5 minutes)
3 Normal Operation Constant Green
Sensor Fault Flashing Red (1Hz) + one
4
(>180 seconds) (1) Amber flash per minute
Level 1 (500ppm)
Gas
5 Concentration Flashing Green (2 Hz)
Level exceeded
(> 2 seconds)
Level 2
(1000ppm) Gas
6 Concentration Flashing Red (2 Hz)
Level exceeded
(> 2 seconds)
Level 2
(1000ppm) Gas
Flashing Red/Amber (2
7 Concentration
Hz)
Level exceeded
(> 30 minutes)
Level 3
(4000ppm) Gas
Flashing Red/Amber (4
8 Concentration
Hz)
Level exceeded
(> 30 seconds)
Gas
concentration
9 level drops below Constant Green
Level 1
(Sensor Reset)
Page 1 of 2
Electrical Connections
Usage
PIN No.
1 Power (V1)
12 > 24v
AC / DC
TCB-LDSBB2 2 Power (V2)
Relay (NO)
Flush - Wall (concrete) 3
47mm 4 Relay (C)
68.3mm Relay (NC)
5
PCB Layout (Front & Rear View)
68.3mm
Metal
Sensor Testing
Measure the Gv voltage on the testing connector (Pins 1 & 4),
as shown above.
Refer to the table below for the expected voltages.
CN80 Operation Pattern
Buzzer Gv
Relay Status Power Status
Status Volts
LDS1/2 Sensor CN80 (FCU)
NO
3
Off N/A Power Off
COM 4 1
NC
5 3
LDS1/2 Sensor CN80 (FCU)
NO 3
Off N/A Power On
COM
4 1
NC 5 3
LDS1/2 Sensor CN80 (FCU)
NO
3
Off <2.0V DC COM Power On
4 1
NC 5
3
LDS1/2 Sensor CN80 (FCU)
NO
3
Pulse 1 per <0.1V DC
Power On
COM
minute 4 1
NC 5 3
LDS1/2 Sensor
CN80 (FCU)
NO 3
Off >2.5V DC COM Power On
4 1
NC
5 3
LDS1/2 Sensor CN80 (FCU)
NO
3
Off >3.5V DC Power On
COM 4
1
NC 5 3
LDS1/2 Sensor CN80 (FCU)
NO 3
Pulses
>3.5V DC COM Power On
4 1
(2Hz)
NC
5 3
LDS1/2 Sensor CN80 (FCU)
NO 3
Pulses
Power On
COM 4
(4Hz) >4.2v DC 1
NC
5 3
LDS1/2 Sensor CN80 (FCU)
NO 3 Power On
Off <2.0V DC
COM
4 1
Power Off to On
NC 5 3
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).
FCU Status
Operating
Fault Code
Condition
None None
None Thermal On
None Thermal On
L30 Thermal Off
None Thermal On
None Thermal On
L30 Thermal Off
L30 Thermal Off
L30 Thermal Off
None Thermal On