TQ Environmental LTD
Product Manual TQ 4000
Filename: 7970H8 Page 7 of 27
1. Installation
1.1. Open the front door and locate the mounting holes in the base of the unit.
Pay special attention to ensure that swarf or dust does not enter the PCB
area.
1.2. Drill out the required number of cable glands in the detachable gland plates.
1.3. Fit the gas detection control unit to the wall in the appropriate position. The
TQ4000 can be fixed in any position to allow cable entry top or bottom. It is
recommended that the unit be situated away from heavy electrical loads or
equipment that emits high levels of RFI.
1.4. The mains are connected to the unit via the power supply unit. It is very
important that the Live, Earth, and Neutral go to the correct position as
indicated in drawing 7970Y. The mains supply should be fused via a 5A spur.
1.5. The sensors shall be connected to the instrument in accordance with drawing
numbers 7970X, 7970Y. 2 or 3 cores; 1.5mm
2
cable with overall screen is
used. The number of cores is sensor dependent. An earth point for the
screens is provided adjacent to the connector blocks. The screen should not
be earthed at the sensor.
1.6. Alarm relays are connected in accordance with drawing 7970Y.
1.7. Check all wiring before connecting mains. All units are configured for 240V,
50Hz unless marked otherwise on the power supply.
1.8. On power up, the unit will inhibit its’ alarms. This lasts for 90 seconds and
allows the sensors to stabilise before commencing scanning. This inhibit
mode may be terminated prematurely by pressing the SELECT button on the
main PCB.
1.9. The channels should then scan through one at a time depending on factory
settings of the number of channels.
1.10. If additional channels are required it will be necessary to fit the relevant extra
input card.
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