ENMET ISA-44-2OD - Manual (Page 11)

ISA-44-2-OD ENMET Corporation
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3.0 Installation 3.0 Installation
The ISA-44-2-OD is completely oiltight and watertight. Use the correct watertight fitting for the cord or conduit
when supplying power to the unit.
3.1 Power Hook-Up and Mounting of Control Unit ISA-44-2-OD
1. Choose a suitable location for mounting the electronics control unit.
2. The OPERATE switch should be in the HORN OFF position.
3. Open the control unit. Remove the terminal strip cover from TB-6 (see Figure 2 and 4). Simply pull the cover
off the holding prongs.
4. Apply 115 V AC , 220 V AC * and/or 12 V DC power to the proper terminals. Refer to Figure 4.
NOTE: 220 V AC power requires a change in the transformer hook-up by a competent electrician or electronics
technician; but this change is best done at ENMET. Both AC and DC power can be applied at the same time.
Current will flow from the AC source; DC current (as emergency back-up power) will flow ONLY when the AC
power is interrupted.
5. Run the relay contacts through the same watertight fitting as the power cord leads or out a second fitting. Be sure
to use watertight fittings that meet NEMA-4X standards. See Figure 8 for an example of relay wiring. When the
power supply is interrupted, the relays switch to the same position as for the true gas alarm condition and the
power lights (green) are off. Do Not Connect the Unit to Other Voltage Supply Lines.
6. Replace the terminal strip cover on TB-6. Make sure the cover fits snugly into the prongs.
Figure 5: Mounting Dimensions ISA-44-2-OD
TB2
TB6
TB1
TB3
TB4
TB5