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30-0954RK-200 Series Sample Draw Aspirator Adapter • 4

The drain fault switch senses a break or very low flow in the water drain line and provides open

contacts in normal operation in the low flow/drain fault contact housing which close when the

switch senses a break, a very low drain flow, or a shut down.

Connecting monitoring devices to the low flow and drain fault contact terminals provides the user

with a notification of a contact closure. Each set of contacts may have their own monitoring device

or they may share one. See “Installation” on page 4 for instructions to wire these terminals using

the two scenarios.

A second plastic cable bushing on the bottom of the low flow/drain fault contact housing allows for

cable entry to the housing. The size range of the cable which can be routed through the second

cable bushing is .064’’ - .210’’ OD.

Installation

Figure 3: Outline & Mounting Dimensions

1. Install the mounting panel to a flat vertical surface using the four mounting holes (0.50’’

diameter) in the corners of the panel. Make sure that sufficient space is allowed to remove the

Low Flow and Drain Fault

Contact Housing

Field Wiring Cable

Entry Bushing for

Switch Contact

Sample Inlet

Aspirator/Sample Exhaust

0.75

Detector

Head with

Chamber

Detector

Head with

Chamber

(4X) Ø 0.50

OUT

(optional)

140 PSI Compressed

Air Inlet

0.75

19.25

20.75

19.25

20.75

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RKI Instruments M2 Betreibershandbuch Seite 7