Macurco RD-VRF Instrucciones De Usuario página 7

1. Turn off all power to product and all I/O circuitry (alarms, control I/O etc.) before starting the
installation, removal, wiring, maintenance, or inspection of the product.
2. Installers must comply with all national and local codes regarding the installation and wiring of line
voltage devices.
3. The RD-VRF mounts on a 2 gang PVC electrical box supplied by the contractor. Do not mount the RD-VRF
inside another box, unless it has good air flow through it.
4. Be careful not to install the gas detector close to air intakes or fans causing strong air currents.
5. Be sure the detectors are attached to a firm base to prevent vibration that can damage them, producing
unreliable results.
6. Install the detectors in a convenient location for future maintenance and calibration requirements
7. Detector must be fully inserted and secured to the PVC junction box ensuring protection from
dust and construction debris (See figure 3-3 & 3-4).
8. Connect the RD-VRF to Class 2 power supply only. It is suggested to use a separate transformer for powering
the unit or units because of possible interferences from other devices on the same power supply.
9. Connect the RD-VRF to the control cables via the terminals. When making connections, make sure the
power is off.
10. There are three terminals for Power:
a. 12-24V: +12-24 is terminal 1 and GND is terminal 3 Refer to: Figure 3-6
b. 90-240V: terminal 1 and terminal 3 no polarity preference Refer to: Figure 3-7
11. There are three terminals for each dry alarm relay contact. The alarm relay can switch up to 1.0 A 30V. The
alarm relays activate if gas reaches or exceeds the alarm settings. Refer to: Figure 3-6 or Figure 3-7
12. The alarm relays can be configured to normally open (default) (N.O.) or normally closed (N.C.) and will
activate if the gas concentration exceeds the alarm set point.
a. Relay 1 Setpoint: 1000ppm
b. Relay 2 Setpoint: 2000ppm
It will deactivate once the gas concentration drops below the alarm set point.
REV – 1.0
Figure 3-2 Profile Views
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