RKI Instruments GD-K7D24X User Manual

Model GD-K7D24X

Supplement to the GD-K7D2

Operator’s Manual

Part Number: 71-0086RK
Revision: A
Released: 3/1/11

www.rkiinstruments.com

WARNING

Read and understand this instruction manual before operating
detector . Improper use of the dete ctor could result in bodily harm
or death.

Periodic calibration and maintenance of the detector is essential
for proper operation and correct readings. Please calibrate and
maintain this detector regularly! Frequency of calibration
depends upon the type of use you have and the sensor types.
T ypical calibration frequencies for most applications a re between
3 and 6 months, but can be required more often or less often
based on your usage.

Model GD-K7D24X Sample Draw Transmit ter

Product Warranty

RKI Instruments, Inc. warrants gas alarm equipment sold by us to be free from defects in
materials, workmanship, and performance for a period of one year* from the date of
shipment from RKI Instruments, Inc. Any parts found defective within that period will be
repaired or replaced, at our option, free of charge. Parts must be returned to RKI
Instruments, Inc. for repair or replacement. This warranty does not apply to those items
which by their nature are subject to deterioration or consumption in normal service, and
which must be cleaned, repaired or replaced on a routine basis. Examples of such items
are:

a) Pump diaphragms and valves c) Batteries
b) Fuses d) Filter elements

Warranty is voided by abuse including mechanical damage, alteration, rough handling, or
repair procedures not in accordance with instruction manual. This warranty indicates the
full extent of our liability, and we are not responsible for removal or replacement costs,
local repair costs, transportation costs, or contingent expenses incurred without our prior
approval.

THIS WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL OTHER
WARRANTIES AND REPRESENTATIONS, EXPRESSED OR IMPLIED, AND
ALL OTHER OBLIGATIONS OR LIABILITIES ON THE PART OF RKI
INSTRUMENTS, INC. INCLUDING BUT NOT LIMITED TO, THE WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO
EVENT SHALL RKI INSTRUMENTS, INC. BE LIABLE FOR INDIRECT,
INCIDENTAL OR CONSEQUENTIAL LOSS OR DAMAGE OF ANY KIND
CONNECTED WITH THE USE OF ITS PRODUCTS OR FAILURE OF ITS
PRODUCTS TO FUNCTION OR OPERATE PROPERLY.

This warranty covers instruments and parts sold to users only by authorized distributors,
dealers and representatives as appointed by RKI Instruments, Inc.

We do not assume indemnification for any accident or damage caused by the operation of
this gas monitor and our warranty is limited to the replacement of parts or our complete
goods. Warranty covers parts and labor performed at RKI Instruments, Inc. only, and does
not cover field labor or shipment of parts back to RKI.

Model GD-K7D24X Sample Draw Transmitt er

Overview

This supplement describes the differences and additional features of the Model GD­K7D24X compared t o the GD- K7D2. It al so describes how to i nstall, s tartup, mai ntain, and
calibrate the GD-K7D24X.

Specifications

Table 1 lists sp ecifications for the GD-K7D24X.

Table 1: Specifications

Target Gas & Detector Range Refer to the RKI Instruments Inc. List of Detectable Gasses
Enclosure Type NEMA 4X
Sampling Method Sample-draw
Input Power See GD-K7D2 manual (115 VAC or 24 VDC version)
Signal Output 4 to 20 mA
Response Time 90% in 60 seconds
Accuracy See GD-K7D2 manual (115 VAC or 24 VDC version)
Flow Rate Approximately 0.5 liters/minute
Recommended Sample Tubing 1/4” O.D. x 1/8” I.D. Teflon PTFE
Recommended Sample Tubing Length See Table 2 in the Installation section of the GD-K7D2

manual.

WARN ING: When using the GD-K7D24X, you must follow the instr ucti ons and

warnings in this manual to assure proper and safe opera tion of the
GD-K7D24X and to minimize the risk of personal injury. Be sure to
maintain and periodically calibrate the GD-K7D24X as described in this
manual.

1 • Model GD-K7D24X Sample D raw Transmitter

Description

Ø .34, 4X

1

1.75

11.23

This section describes the components of the GD-K7D24X. It consists of the enclosure and
a GD-K7D2 mou nted inside.

1.43

3/4" Conduit

Hub, 2X

9.88

Figure 1: Outline & Mounting Dimensions/Component Location

Exhaust Fitting

2.51

8.227.01

Inlet Fitting

A hydrophobic sample filter is also provided with the GD-K7D24X fo r installation near
the inlet fitting. The filter scrubs particulates out of the sample stream and keeps water
and many other liqui ds from entering the GD-K7D24X flow system.

Enclosure

The enclosure is a type NEMA 4X plastic enclosure designed for use in areas that are
subject to rain or hosing down. A mounting foot is installed in each corner. Two sample
fittings are mounted on the bottom right of the enclosure and two 3/4” conduit hubs are
mounted to the left of the sample fittings.

Sample Fittings

The inlet fitting is on the bottom right of the enclosure and the exhaust fitting is to the left
of the inlet fitting. The fittings accept 1/4”O.D. x 1/8” I.D. Teflon tubing.

Conduit Hubs

Two 3/4” conduit hubs are located to the left of the sample fittings. They are used for
routing wiring into the enclosure by using conduit or an appropriate cable bushing.

Model GD-K7D24X Sample Draw Transmitter • 2

Installation

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 N EMA 4X
enclosure. There are two types of GD-K7D2’s that can be mounted in the enclosure: a
24VDC version and a 115 VAC ve rsion. See the GD-K7D2 Op erator’s Manual for a
complete description of the GD-K7D2.

This section describes how to install the GD-K 7D 24X 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 s ufficient 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 wh ich 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. T o reduce response time, keep the

incoming sample line as short as possibl e.

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 t o the G D-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.

3 • Model GD-K7D24X Sample D raw Transmitter

2. Place the controller’s and GD-K7D24X’s power switches in the OFF position.

3. Use the conduit hubs at the bottom of the GD-K7D24X for routing shielded cable into
the enclosure and then route the cable through the cable bushing on the GD-K7D2.
See the Installation sections of the GD-K7D2 Operator’s Manual for wiring
connections between the GD-K7D2 and the controller.

Two conduit hubs are provided on the enclosure. One of them may be used for AC
power if a 115 VAC GD-K7D2 is installed. Plug any unused conduit hub with a 3/4”
conduit plug.

4. Connect the cable shield’s drain wire to a chassis ground at the controller, but do not
connected it at the GD-K7D24X.

CAUTION: Leave the cable shield’s drain wire insulated and disconnected at the GD-K7D24X.

You will connect t he opposite end of the cable shield’s drain wire at the controller.

CAUTION: At the controller, do not route power and GD-K7D24X wiring through the same

conduit hub. The power cable may di srupt the transmission of the GD-K7D2’s
signal to the controller.

Start Up

See the GD-K7D2 Operator’s Manual for GD-K7D2 startup instructions.

Operation

See the GD-K7D2 Operator’s Manual for an operational description of the GD-K7D2 that
is mounted inside the enclosure.

Maintenance/Calibration

See the GD-K7D2 Operator’s Manual f or maintenance and calibration instructions. Use
the inlet fitting on the NEMA 4X enclosure to apply gas instead of the fittings inside the
enclosure on the GD-K7D2.

Parts List

Table 4 lists replacement parts and accessories for the GD-K7D2.

Part Number Description

Table 2: Parts List

06-1273RK 1/4” O.D. x 1/8” I.D. Teflon PTFE tubing
17-4820RK Sample fitting, 1/4” tube bulkh ead union
18-0107RK 3/4” conduit hub

Model GD-K7D24X Sample Draw Transmitter • 4