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Series SLD Single Channel Leak Detection Relay

Specifications - Installation and Operating Instructions

Bulletin L-43

The Series SLD is a specialized control for monitoring the shaft

seal of a submersible pump motor. 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 LED illuminates. When the fault condition

clears, the output relay resets automatically.

Important: Read the following carefully and completely before

installing or connecting SLD 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 11-pin 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 SLD controller in the 11-pin socket.

5.ADJUSTABLE SENSITIVITY MODELS ONLY: Set the

potentiometer on face of unit to desired resistance.

6.Resume power to control panel and monitor system for proper

functionality.

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

19/64

(7.54)

(76.20)

2-3/8

(60.32)

1-3/4

(44.45)

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: DPDT.

Switch Voltage: 9 VDC.

Electrical Rating: 10 A @ 250 VAC resistive, 360 VA inductive.

Response Time:

Energize: 15 ms (approximate);

Release: 8 ms (approximate).

Indicators: Red LED illuminates when leak is detected.

Enclosure: Polycarbonate dust cover.

Mounting: 11-pin socket.

Weight: 8 oz (227 g).

Agency Approvals: UL 508.

MAINTENANCE

Upon final installation of the Series SLD Single Channel Leak

Detection Relay, no routine maintenance is required. A periodic

check of the system calibration is recommended. The Series SLD

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.

Figure A

RESISTIVE

FLOAT

SWITCH

N.C.

CONTACT

N.O.

CONTACT

HOT

NEUTRAL

LOAD

ALARM

111

L-43 10/11/07 3:15 PM Page 1

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Series SLD Single Channel Leak Detection RelaySpecifications - Installation and Operating InstructionsBulletin L-43The Series SLD is a specialized con

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