How do I install my Macurco GD-6?
Last Updated: 12/09/2013
By Petra Paulson
3. Make sure the power is off and connect the GD-6 to the control cables with terminal plugs.
4. There are 2 power terminals: 12 to 24VAC or 12 to 48VDC, with no polarity difference.
5. There are also 2 terminals for the dry alarm relay contacts, again with no polarity preference. The alarm relay can switch up to .5A, 200V, or 10VA. If gas reaches or exceeds the alarm settings, the alarm relay is activated.
6. The alarm relay will activate if the gas concentration exceeds alarm set point (5, 10, 15, 20 (default), 25% LEL); the relay can be configured to normally open (default) (N.O.) or normally closed (N.C.).
7. The dry contact, SPDT fan relay has 3 terminals. The common (COM.), N.O. and N.C. contact. The fan relay can switch up to 5.0A, through 240VAC.
8. The fan relay can be wired to N.O. or N.C. and will engage if the fan setting (1, 2, 3, 4, 5, 6, 7, 8, 9, 10 (default), 11, 12 ,13, 14, 15, 16, 17, 18, 19, 20% LEL) is exceeded for the fan relay delay time (O, 1, 2, 3 (default), 5, 10 minutes). The fan relay will disengage once both of these conditions have been met: a) Combustible gas concentration has dropped below fan setting and b) Fan relay run time (0 default), 3, 5, 10, 15 minutes) has been exceeded. The "disable" fan setting keep the fan relay from engaging. The fan relay will engage in trouble fault condition and will disengage once the trouble fault condition is cleared.
9. Current Loop is 4mA in clean air and 4-20 mA for 0-50% LEL.