Sierra Monitor Corporation 3100-01 General Precautions, Housing and Conduit Mounting the Housing

Instruction Manual

3.0INSTALLATION

3.1General Precautions

All wiring and installation must be done in accor- dance with the NFPA 70 and 72 standards and must comply with any codes specific to the application or location. Contact the local authority having juris- diction and the company safety engineer for infor- mation on codes which may apply.

3.2Housing and Conduit

3.2.1Mounting the Housing

The housing is mounted by using the two 0.3” diameter holes located in ears on the back of the housing. The two conduit holes located on the side of the housing are not to be used for mounting. The detector should be mounted securely to a flat surface. The mounting location must be strong enough to support the detectors 3 lb. weight. Although the detector is not vibration sensitive the de- tector should not be exposed to excessive vi- bration. "(The detector has been tested to meet the vibration standard set in FM’s Ap- proval Standard Class 3820, Sept. 1979. (.022" displacement, 10 Hz to 30 Hz sweep cycled at 2 cpm for 4 hours)"

3.2.2Installing the Conduit and Wiring

Mount a “Seal Off” at the housing into the 3/4” NPT conduit(s) located on either side of the housing. Connect the conduit to the “Seal Off”. If one of the conduit openings is not used insert a sealing plug into the unused opening. Run the wires through the conduit, “Seal Off”, and into the housing. The ends of the wire should extend several inches (at least 2” to 4”) beyond the front of the hous- ing base.

3.3Connection (See Appendix C for information regarding connection to various systems)

All connections are made on the back of the Model 3100 Flame Detector Module. Remove the housing cover from the housing base. Loosen the two slot- ted head captive screws located on the top of the PC board. Lift the Detector Module out of the housing base. Strip and connect the wires to the connectors located on the back of the Detector Module.

3.3.1Power

Power for the 3100-01, -02, -03, -04 and - 05 flame detector is connected to the J5 con- nector labeled “Power”. Connect the nega- tive wire to PIN 1. Connect the positive (24 VDC) wire to PIN 4.

Power for the 3100-06 detector connected to the J2 connector. Connect positive wire at 4. Connect negative wire at pin 1. Pins 2 and 3 should be left open.

3.3.2Fire Relay

The Fire Relay has two internal connection points. Either or both may be used. The Fire Relay connector, labeled “FIRE”, has connection points for Normally Open, Nor- mally Closed, and Common. The Normally Open connections are labeled “Open”, the Common contacts are labeled “Com”, and the Normally Closed contacts are labeled “Closed”.

3.3.3Verify Relay

The Verify Relay has two internal connec- tion points. Either or both may be used. The Verify Relay connector is located between the Power and Fire relay connectors. The connection points are labeled “Verify In” and “Verify Out”. The Verify relay is configured for Normally Open (3100-02 and 3100-04), or Normally Closed (3100-03 and 3100-05) operation at the factory.

3.3.4Fault Relay

The Fault Relay connector is labeled “Fault”. The Normally Open connection is labeled “O”, the Common connection is labeled “Com”, and the Normally Closed connec- tion is labeled “C”. The Fault Relay is a normally energized relay. When the detec- tor has no power the Normally Open contact is closed and the Normally Closed contact is open.

Model 3100 Series Flame Detector (11/04) Page: 7