Dwyer DLD User Manual
Series DLD Dual Channel Leak Detection Relay
Specifications - Installation and Operating Instructions
Bulletin L-44
The Series DLD is a specialized control for monitoring the shaft
seal of two submersible pump motors. A leak is detected by
sensing the status of a resistive float switch installed in the seal
cavity. When the resistance drops below the sensitivity rating the
output relay energizes and the corresponding LED illuminates.
When the fault condition clears, the output relay resets
automatically.
Important: Read the following carefully and completely before
installing or connecting DLD units.
Note: DO NOT exceed specified electrical rating. Doing so may
result in damage to control unit and load device.
INSTALLATION
1.Lock out all electrical current to relevant control panel during
installation.
2.Fasten a standard 8-pin octal socket in the control panel.
3.Make the appropriate connections as shown in the wiring
diagram (Figure A) to the corresponding numbered contacts on
socket.
4. Fit the Series DLD controller in the 8-pin octal socket.
SPECIFICATIONS
Power Requirement: 120 VAC, 50/60 Hz.
Power Consumption: 2 VA (approximate).
Isolation Voltage: 2500 V.
Temperature Limits:
Operating: -4 to 131°F (-20 to 55°C);
Storage: -40 to 185°F (-40 to 85°C).
Switch Type: (2) N.O. SPST.
Switch Voltage 9 VDC.
Electrical Rating: 5 A @ 120 VAC resistive, 345 VA inductive.
Response Times:
Energize: 6 ms (approximate);
Release: 2.5 ms (approximate).
Indicators: Respective red LED illuminates when leak is
detected.
Enclosure: Polycarbonate dust cover.
Mounting: 8-pin octal.
Weight: 8 oz (227 g).
Agency Approvals: UL 508.
NEUTRAL
HOT
ALARM 2
ALARM 1
Figure A
6
7
COND.
PROBE
COND.
PROBE
2
1
4
5
3
2
81
5.ADJUSTABLE SENSITIVITYMODELS ONLY:Set the
potentiometer on face of unit to desired resistance.
MAINTENANCE
Upon final installation of the Series DLD Dual Channel Leak
Detection Relay, no routine maintenance is required. A periodic
6.Resume power to control panel and monitor system for proper
functionality.
check of the system calibration is recommended. The Series DLD
is not field serviceable and should be returned if repair is needed
(field repair should not be attempted and may void warranty). Be
sure to include a brief description of the problem plus any relevant
application notes. Contact customer service to receive a return
goods authorization number before shipping.
©Copyright 2007 Dwyer Instruments, Inc. Printed in U.S.A. 10/07 FR# R3-443592-04
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com
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