Detcon 971-071170-LRY - Manual (Page 2)

1.0 DESCRIPTION
The Detcon Model 971-071170-LRY is a 117VAC powered gas detection system that provides a remote gas
sample to an independent sensor assembly. The sensor assembly, discussed in the attached sensor manual,
is specified at time of order as to gas and range of detection and other options. The NEMA 7X rating is by
definition explosion proof and therefore is suitable for outdoor location in electrically hazardous environ-
ments.
The enclosure houses a 24 VDC power supply, flow pump, liquid level module, and flow fault/liquid
level detection circuit. A motherboard provides lugless field wiring terminals which, depending on the
type of sensor used, include options for: 117 VAC power input, 24 VDC battery backup power input, 4-20
mA signal output, alarm relay dry contacts, and RS-485 Serial communications. Internal panel mount fuses
are provided for VAC and VDC power.
A power switch, power indicator lamp and a flow fault indicator lamp are mounted on the hinged door.
Externally mounted flow controls include a selector valve for sample and calibration and a flow meter with
adjustable valve. An externally mounted moisture filter is provided for the gas sample input.
1.1 INSTALLATION
1. Securely mount the enclosure in accordance with the drawing below.
Detcon Model 971-071170-LRY Gas Detection System PG.2
0
100
200
300
400
500
CAL PORT
SET
FLOW
SAMPLE
PORT
detcon inc.
HOUSTON, TEXAS
SAMPLE DRAW
GAS DETECTION SYSTEM
1/4" Stainless
Steel Tubing
Max Distance 150 ft.
10 3/4"
24"
7/16"
8.5"
15 3/8"
23 1/2"
Depth 9 1/2"
ON/OFF
FLOW FAULT
POWER