Armstrong Monitoring Corporation 1044-T Installations- und Betriebsanleitung - Seite 9

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4 INSTALLATION

4.1 LOCATION AND MOUNTING

Care should be taken to securely fasten the AMC-1044-T monitor unit (via four mounting holes

provided) to a solid, vertical, non-vibrating surface or structure. Mounting height is dependent on

gas type. (See Figure 5 for mounting dimensions.)

Note:

All cable entry MUST be through the BOTTOM of the monitor enclosure only. Other

entry locations will allow foreign materials to enter the enclosure, possibly causing

damage to internal components. Mounting hardware and conduit connections are NOT

supplied.

Mount the 1044-T NEMA-4x monitor in a NON-HAZARDOUS area where local concentrations

of gases are unaffected by the presence of ventilation systems and where the unit can be

observed periodically.

4.2 WIRING OF THE MONITOR

POWER SUPPLY:

RELAYS:

TRANSMITTER

AMC-1044-T Monitor

The monitor operates on 120 VAC, 60 Hz.

transformer runs the internal circuitry at low voltages. The power supply

connections are made at the power terminal block located inside the

monitor. (See Figure 3)

There are up to 3 DPDT relays, which activate with high alarm, low alarm

and optional fail respectively causing contact transfer. The contacts are

available for activating a remote alarm and/or, blower motors where

moving parts are fully guarded, pumps or lighting circuits. Relays are

rated 1/3 hp @ 120 VAC/240 VAC, 10 Amps @ 28 VDC/120 VAC/240

VAC resistive. For relay contact arrangement see Figure 6. The high and

low alarms relay coils are normally de-energized and the optional fail

relay coil is normally energized.

Each transmitter connects to a terminal block labeled Sensor (-SENS+)

located on the PC board. All Connections should be made using shielded

2 or 3-conductor cable, depending on which sensor or transmitter is

used. See schedule of cable sizes (Section 4.3) to select the appropriate

cable.

A Class II step down