Installation; 6-Series Low Voltage - Macurco RD-6 Manuel D'instructions

Macurco RD-xx User Manual
High voltage terminals (120/240 VAC) are located within this detector, presenting a hazard to
service technicians. Only qualified technicians should open the detector case and service the
internal circuits. Ensure power is de-energized from the detector relays prior to servicing the
unit. Failure to do so may result in electrical shock.

3.2 Installation

3.2.1 6-Series Low Voltage

1. The RD-6 mounts on a 4" square (or 4x4) electrical box supplied by the contractor. Do not mount the RD-6 inside
another box, unless it has good air flow through it.
2. Connect the RD-6 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.
3. Connect the RD-6 to the control cables with terminal plugs. When making connections, make sure the power is off.
4. There are two terminals for Power: 12 to 24 VAC or 12 to 32 VDC, with no polarity preference.
5. There are two terminals for the dry alarm relay contacts, again with no polarity preference. The alarm relay can switch
up to 0.5 A 120 V, or 60 VA. The alarm relay is activated if gas reaches or exceeds the alarm settings. See OPERATION
section of these User Instructions for details on relay settings.
6. The alarm relay can be configured to normally open (default) (N.O.) or normally closed (N.C.) and will activate if the gas
concentration exceeds alarm set point. It will deactivate once the gas concentration drops below the alarm set point.
Note that the "disable" setting will cause the alarm relay not to engage at all.
7. The dry contact, SPDT fan relay has three terminals. The common (COM.), normally open (N.O.) and the normally
closed (N.C.) contact. The fan relay can switch up to 5.0 A up to 240 VAC. See OPERATION section of these User
Instructions for details on relay settings.
8. The Fan Relay can be configured for latching or non-latching (default) when activated (when the gas concentration
exceeds fan relay setpoint). Once latched in, power will need to be interrupted or the "TEST" button pressed to un-
latch the relay condition.
9. The Fan Relay will engage if the fan setting refrigerant concentration is exceeded for longer than the Fan Relay Delay
time. Unless it is configured for latching, the fan relay will disengage once both of these conditions have been met:
Refrigerant gas concentration has dropped below fan setting
•
Fan Relay Runtime has been exceeded
•
Note that the "disable" fan setting will cause the fan relay to not engage. The fan relay will engage in trouble fault condition
(if the Trouble Fan Setting Option is set to "On") and will disengage once trouble fault condition is cleared.
10. The Current Loop is 4 mA in clean air and 20 mA for 1,000 ppm refrigerant gas
REV – 1.0
WARNING
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