aquilar AquiTron AT-MGS-402, Installation & Operation Instructions

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AT-MGS-402 User Manual

AT-MGS-402

AT-MGS-410

AT-MGS-402

AT-MGS-410

No Audio Alarm

LED is solid 

GREEN

3.  If applicable, verify that any monitoring device(s) connected to the AT-MGS-402’s analog output 

is receiving the proper signal from the controller.

4.  If applicable, verify that any Modbus BMS Master device(s) are communicating properly with the 

AT-MGS-402 controller.

5.  If applicable, verify any peripheral device(s) which are connected to the AT-MGS-402’s relays 

are operating as intended in a normal / non-alarm status.

CAUTION:

 The following System Check is intended to reproduce the full function of the 

gas detection system in its alarm state. The individual conducting the test should be 

aware these alarm responses; including audio / visual alarms, peripheral devices and / or 

any equipment shutdown processes prior to starting the test. Any adverse consequences 

resulting from simulating a system alarm response should be anticipated and mitigated 

before starting the test. Always follow local procedures / policy when conducting a gas 

detection system test.

7.  As a final system commissioning step, apply calibration span gas to the connected AT-MGS-410 

Refrigerant Detector(s) so to place them into an alarm state. Verify the proper function of 

the AT-MGS-402 and AT-MGS-410 audio / visual alarm functions as well as verify the proper 

function of connected relay peripherals and analog and Modbus monitoring devices.  

Though Aquilar recommends a full system test with calibration span gas, there may be 

circumstances where the customer wishes to check the relay peripheral device function 

without applying span gas. This can be accomplished through the following steps:

•  Power off the AT-MGS-402 Controller

•  Remove the front cover and change the DIP Switch selection for the relay state to the 

opposite of the intended function. SWITCH #1 

(For instance, if FAIL SAFE Operation is ENABLED, 

then DISABLE it)

.

•  Replace the front cover and return power to the AT-MGS-402 Controller.

•  After warm up, verify that the relay peripheral devices are in their intended alarm / fault state.

•  Remove power to the AT-MGS-402, and return the relay switches 

(SWITCH #1)

 to their 

original state.

•  Replace the front cover and return power to the AT-MGS-402.

•  After warm up, verify that the relay peripheral devices are in their normal, non-alarm state.