RKI Instruments GD-K7D24X - Manual (Page 6)

3 • Model GD-K7D24X Sample Draw Transmitter
GD-K7D2
The GD-K7D2 sample draw detector head is mounted to a plate inside the enclosure. The
GD-K7D2 sample fittings are factory connected to the sample fittings on the NEMA 4X
enclosure. There are two types of GD-K7D2’s that can be mounted in the enclosure: a
24VDC version and a 115 VAC version. See the GD-K7D2 Operator’s Manual for a
complete description of the GD-K7D2.
Installation
This section describes how to install the GD-K7D24X at the monitoring site.
Mounting the GD-K7D24X
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-K7D24X 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-K7D24X. Also make sure there is sufficient room to perform
start-up, maintenance, and calibration procedures.
• Select a site near the sampling area. The GD-K7D24X is designed to detect a
variety of toxic gases many of which are easily absorbed in sample tubing. See
Table 2 from the GD-K7D2 Operator’s Manual for appropriate tubing lengths.
Teflon PTFE tubing is recommended.
• Use four 1/4” screws through the mounting feet to mount the GD-K7D24X to a
vertical surface. See Figure 1 for the mounting dimensions.
Connecting Sample Lines to the GD-K7D24X
1. Install a short piece, up to 8” long, of 1/4” O.D. x 1/8” I.D. Teflon PTFE sample tubing
to the inlet fitting.
2. Connect the sample filter to the tube. The sample filter has flexible tube stubs on each
end. Push one end onto the sample tube.
3. Connect another length of sample tubing to the other side of the sample filter and
route it to the sampling area. Be sure not to exceed the maximum sample tubing
length listed in Table 2 of the GD-K7D2 Operator’s Manual.
CAUTION: Avoid loops or slumps in the incoming sample line. To reduce response time, keep the
incoming sample line as short as possible.
4. Attach 1/4“ O.D. x 1/8” I.D. Teflon PTFE sample tubing to the gas out fitting. Route
the opposite end of the tubing to an open area where the sample can safely disperse or
to an exhaust duct.
Wiring the GD-K7D2 to a Controller
WARNING: Always verify that power to the GD-K7D24X and to the controller are off
and that the controller’s and GD-K7D24X’s power switches are in the off
position before making wiring connections or adjustments.
1. Turn off power to the controller and the GD-K7D24X.