Instruction Manual

Model GD-70D4A-XX Sample Draw Transmitter • 4

Figure 3: Factory Wiring

Installation

This section describes how to install the GD-70D4A-XX at the monitoring site.

Mounting the GD-70D4A-XX

1. Select a mounting site that is representative of the monitoring environment. Consider the

following when you select the mounting site.

• Select a site that is easily accessible for servicing.

• Select a site where the GD-70D4A-XX is not likely to be bumped or disturbed. Make sure

there is sufficient room to make wiring and sample line connections at the bottom of the

GD-70D4A-XX. Also make sure there is sufficient room to perform start-up,

maintenance, and calibration procedures.

• Select a site near the sampling area. The GD-70D4A-XX is designed to detect a variety of

toxic gases many of which are easily absorbed in sample tubing. Keep the sample line

length to a minimum. Teflon PTFE tubing is recommended.

• Use four 1/4” screws through the mounting feet to mount the GD-70D4A-XX to a vertical

surface. See Figure 4 for the mounting dimensions.

FAULT

10987

--++

4-20mADC24V

(AC)

-VLN

BLK

Power Supply

Terminal

654321

GRN

AC in Terminal

GD-70D

Backplate

ALM 1

ALM 2

BLK

GRN

WHT

RED