Operations; Power Up; Display Turned "On - Macurco CM-6 Instrucciones Para El Usuario

Macurco CM-xx Operation Manual
3.3.2.1 Mains Power Connection
Mains connections should be done in accordance with National and Local Electrical Codes. Only qualified personnel should
connect Mains power to any device. Macurco recommends a minimum wire size of AWG18 and the wire insulator must be rated
for 140°F (60°C) service. The modular connector will accept wire from 12 to 22 AWG.
The safety ground wire should be secured to the ground screw of the metal electrical box. Tighten the screw and make sure the
wire is snug. Ensure that the wire cannot be pulled out from under the screw.
The Line (L) and Neutral (N) wires should be stripped 1/4 in. (6.5 mm), insert the wire into the "L" and "N" wire positions of the
modular Fan/Power connector and tighten the screw clamp. Ensure that the wire cannot be easily pulled from the connector.
Plug the modular connection into the Fan/Power connection and ensure that it latches into the header properly.
3.3.2.2 Fan Relay connection
All of the SPDT Fan relay terminals are available at the Fan/Power modular connector. Each Fan relay terminal normally open,
common and normally closed (NO, COM and NC) can accommodate a wire size 12 to 22 AWG. To install the wiring for the relays,
disconnect the connector from the header. Strip the insulation of each wire back approximately 1/4 in. (6.5 mm), insert the bare
wire into the terminal and tighten the screw clamp. Ensure that the wire cannot easily be pulled from the connector. Plug the
modular connection into the Fan/Power connection and ensure that it latches into the header properly.
3.3.2.3 Alarm Relay Connection
The external alarm connections (A and B) are available at the Alarm modular connector. There is no polarity for these
connections. To install the wiring for the alarm contacts, disconnect the connector from the header on the detector. Strip the
insulation of each wire back approximately 1/4 in. (6.5 mm), insert the bare wire into the terminal and tighten the screw clamp.
Ensure that the wire cannot easily be pulled from the connector. When the wires are connected seat the modular connector
into the header ensuring that the latch engages
3.3.2.4 4-20 mA Signal Connection
The positive and negative 4-20mA signal connections (+ and -) are available at the 4-20mA modular connector, a 2-position
connector. To install the wiring for the 4-20 mA contacts, disconnect the connector from the header on the detector. Strip the
insulation of each wire back approximately 1/4 in. (6.5 mm), insert the bare wire into the terminal and tighten the screw clamp.
Ensure that the wire cannot easily be pulled from the connector. When the wires are connected seat the modular connector
into the header ensuring that the latch engages

4 Operations

4.1 Power up

The CM-xx cycles through an internal self-test cycle for the first minute that it is powered. The unit will execute the test cycle
any time power is dropped and reapplied (i.e. power failure). During the self-test cycle the unit will display the firmware version
number, then count down from 60 to 0 (if the display setting is "On") and finally go into normal operation. The alarm relay will
be activated for 10 seconds and the fan relay for 60 seconds during the power-up cycle unless the "Power Up Test" (PUt) option
is OFF. The indicator light (LED) will flash green during the self-test cycle. If 4-20mA setting is set to "EnH", CM-xx will transmit
information related to calibration period status via 4-20mA output during power-up cycle. At the end of the 1-minute cycle, the
unit will take its first sample of the air and the indicator light will turn solid green.

4.2 Display turned "On"

Clean Air – With the display function turned "On", the CM-xx will show the current concentration of CO ppm or "0" (zero) in
clean air.
Fan level – When the CO concentration reaches the Fan Relay setting (35 ppm, for example) the display will flash back and forth
between "FAn" and "35" or current concentration of gas.
REV – 1.2 [34-2900-0511-6]
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