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Wall-mount type of Carbon Dioxide Detector 

Model: GTF220

 

GASTECH is a professional manufacturer in various gas detectors, carbon monoxide detector, carbon dioxide detector, 
oxygen detector, odor detector, VOC detector, hydrogen sulfide detector and carbon monoxide detector. Welcome tour 
our website 

www.gastech.com.tw 

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Installation and Wiring 

1.

 

Please read the Security Notifications in detail firstly.

 

2.

 

The gas detector might install on wall or steel plate, please refer following drawing to make marking then drill 
the holes. Do not use the gas detector as a drilling template to avoid fault.

 

 

 

3.

 

Due to the space is very small that is impossible to use wrench. Therefore, to use female expansion bolts on the 
wall or tap female screws on the steel plate and use external screw (male bolts) that can use the screw driver to 
install the gas detector and solve spacing problems. M6 sizes of bolts have a good tolerance than W1/4. 

 
 
 
 
 
 
 
 
 
 
 
 

Summary of Contents for GTF220

Page 1: ...Security Notifications in detail firstly 2 The gas detector might install on wall or steel plate please refer following drawing to make marking then drill the holes Do not use the gas detector as a drilling template to avoid fault 3 Due to the space is very small that is impossible to use wrench Therefore to use female expansion bolts on the wall or tap female screws on the steel plate and use ext...

Page 2: ...astech com tw 2 4 Analog output A recommend fuse is 0 2 A in the above 5 Relay output A recommend fuse is 0 2 A the diode could be 1N4002 or 1N4004 in the above 6 In order to meet waterproof the wiring material and parts should be met the requirement also 7 The wiring size is not less 0 5 mm 2 or 20 AWG In the case of long distance wiring to apply bigger size or 30 VDC power is better 8 The detect...

Page 3: ...ons Specification maybe changed without notice model GTF220 A GTF220 R type wall mount sensor solid electrolyte target carbon dioxide sampling method diffusion measuring range 350 8 000ppm resolution accuracy sampling time 1 ppm 5 F S 350 5 000ppm continuity alarm level high alarm resetable analog output 4 20 mA max load resistance 500 ohm N A relay output rating N A single pole normal open relay ...

Page 4: ...s The following operating procedure describes the settings In the operation press NEXT key or idle 3 minutes the display will back to the concentration of carbon dioxide In the display press NEXT key to enter next function In the display press ADJ key the buzzer and flash lamp will action Press ADJ key again they will stop The relay will make action in TEST ALARM also if detector model has relay o...

Page 5: ...and ADJ key at the same time the detector will execute calibration function The calibration will take 10 minutes in the period time here the detectors will access the lowest detecting value to make a basis of 350 ppm of carbon dioxide In order to get good basis and to avoid the breath affect consequence the operators have to leave and come back again after 10 minutes It is necessary to provide a f...

Page 6: ... carbon dioxide is higher than the buzzer high limit the detector will show this display If the concentration of carbon dioxide is over 8 000 ppm will show 8 000 ppm Press NEXT key the buzzer will mute and the display will back to the concentration of carbon dioxide If the concentration of carbon dioxide is still higher than buzzer high limit this message and audible alarm will come again after 30...

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