1. Voltage Verification

Prior to product installation, verify that the voltage rating of the intended electrical service matches the voltage rating of the unit to be installed. Warning: serious injury or damage can result from installing a product with an improper voltage rating. Contact Current Technology if voltage ratings are not identical. For WYE connected systems, verify neutral-ground bond on secondary side of upstream distribution or service entrance transformer. Warranty void if DPplus is connected to incorrect voltage configuration or if neutral-ground bond is not present in WYE configured systems.

2. Installation Location

To minimize installed system impedance, install DPplus in a location that minimizes electrical wire bends and wiring distance from point of connection.

3. Mounting

Utilizing the mounting feet and hardware supplied with the unit, mount the DPplus securely and rigidly to building surface or structural member. Attach conduit and pull wires as necessary.

4. Electrical Connections

VERIFY THAT POWER IS DE-ENERGIZED ON ELECTRICAL LINES ASSOCIATED WITH INSTALLATION OF THIS UNIT. DPplus models are equipped with integral fused disconnect switch that permits direct connection in parallel with the electrical distribution system without utilizing an additional external fused disconnect switch or circuit breaker. Use #2 AWG copper wire for parallel phase conductor connections to fused disconnect terminals (L1, L2, L3). Use a #2 to 1/0 AWG copper wire for neutral (N) and ground (EG) connections (no neutral (N) for DELTA configurations). Tighten lugs of fused disconnect to a maximum torque of 35 in-lb and 52 in-lb. for neutral (N) and ground (EG). Caution: B phase must be the high leg for high leg DELTA configured products installed on high leg DELTA systems. Contact factory for other voltage configurations not listed on DPplus technical data sheet.

5. StatusWatch

DPplus models include StatusWatch diagnostic monitoring. StatusWatch includes battery backed-up audible alarm with test and disable functions, two sets of form C remote monitor dry contacts and disturbance counters. Battery is field replaceable, standard 9V alkaline. To activate battery, remove isolation strip between battery and terminal and push battery firmly into battery holder terminals.

To test audible alarm, press alarm test push-button: alarm should sound and alarm/test indicator should flash. Alarm may be silenced by moving toggle switch into upper position; alarm disable indicator will illuminate.

To wire dry contacts, locate two gray terminal blocks on the cabinet door interior. Each set of contacts can be wired independently. For normally open operation under energized conditions, connect the normally open terminal and common terminal to the monitoring input. For normally closed operation during energized conditions, connect the normally closed terminal and common terminal to the monitoring input. Upon loss of power to any or all phases, contacts will change to alarm state.

StatusWatch dual disturbance counter(s) measure the number of Line-to-Neutral and Line-to-Ground transients occurring in WYE configurations. For DELTA systems, a single counter measures Line-to-Line transients. To reset counters, remove connector on the back of each counter and short pins 1 & 3.

6. Before energizing DPplus Check all connections to ensure solid electrical connection. Tighten any loose connections to appropriate torque values.

Measure voltage Line-to-Line, Line-to-Neutral, Line-to-Ground and Neutral-to-Ground to ensure that it does not exceed ±10% of the nominal rated voltage for the unit. Contact factory if these tolerances are exceeded.

7. Final Instructions

If all voltages are in tolerance, apply power to the unit by engaging the integral fused disconnect switch. Illumination of status lights indicates proper function.

8. DTS-2 Test Point

Disconnect wire harness connector between suppression module and diagnostic monitoring located on interior of DPplus door before testing the unit with the optional DTS-2 Diagnostic Test Set. Reconnect upon completion of testing.