Det-Tronics U9500 Infiniti Gas Transmitter User Manual

Page 7

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95-8444

10.1

1. Install the unit in a location that is best suited to cover

the area to be protected. Whenever practical, the

Infiniti should be placed where it is easily accessible

for calibration. For proper operation, sensors should

be pointing down, except for PointWatch, which must

be mounted horizontally. See Figure 1 for mounting

dimensions.

NOTE

When used with the PointWatch infrared
hydrocarbon gas detector, a 1/4 inch spacer is
required between the enclosure and the mounting
surface to allow adequate room for the detector
and calibration windshield, if required.

2. Remove the transmitter from its packing material and

note the location of the field wiring terminals and (on

the catalytic sensor transmitters only) the location of

a small sensor connection plug on the side opposite

the field wiring terminals.

3. Remove the cover from the enclosure. The transmitter

module slides into the mounting bracket within the

enclosure and all field and sensor wiring connects

to this module.

– For catalytic combustible gas transmitters, the

sensor connects to a small plug on one side of the

transmitter and all field wiring connects to terminals

on the other side.

– For all other gas transmitters, the sensor and field

wiring all connect to the terminal block on one side

of the transmitter module.

4. Connect the transmitter enclosure to the field wiring

conduit. The enclosure should be electrically

connected to earth ground.

5. Attach the sensor to the proper entry on the transmitter

enclosure. It is recommended that a layer of teflon

tape be applied to the sensor threading. Route the

wires through the entry, and tighten the sensor to the

enclosure to ensure an explosion-proof installation.

Do not overtighten.

iMPOrTanT

To ease maintenance, periodically apply
a generous amount of Lubriplate grease (part
number 102868-001) to the internal threads on the
junction box cover using an application tool. Do
not use any silicon based products, since some
materials can cause irreversible damage to the
sensing element in the gas sensor.

6. Slide the transmitter module into the bracket,

being careful to route field and sensor wires to the

appropriate location within the enclosure for easy

connection to the transmitter module. Ensure that

the transmitter display and pushbuttons (at the top)

are oriented correctly.

CaUTiOn

Wires can become pinched between the cover
and base if they are not properly tucked down
inside the enclosure.

DISTANCE (FEET)

2000

4000

6000

8000

10000

12 AWG

14 AWG

16 AWG

18 AWG

POWER SUPPLY VOLTAGE

A1672

Figure 3—Transmitter Wiring Requirements

for Combustible Gas Model with Relays