Honeywell SN0500 User Manual

SN0500 / SN0501

REFRIGERANT GAS LEAK DETECTOR

INSTALLATION / USER GUIDE

GAS LEAK DETECTOR INSTALLATION & USER GUIDE

1. INTRODUCTION.................................................................................................... 3

2. EXTERNAL CONNECTIONS................................................................................. 3

3. POWER SUPPLY................................................................................................... 4

4. ANALOGUE OUTPUTS......................................................................................... 4

5. RELAY CONTACTS............................................................................................... 5

6. GAS DETECTION RANGE .................................................................................... 5

7. STANDARD DEFAULT SETTINGS....................................................................... 6

8. CONNECTIONS AT A GLANCE............................................................................ 7

At the time of writing, this User Guide accurately describes the product. However, in the course of development of our products we may make changes without notification. Honeywell shall not be liable for errors or for incidental or consequential damages, directly or indirectly, in connection with the furnishing, performance or misuse of this product or document. All Installation and Commissioning work on Honeywell equipment should be carried out by suitably qualified personnel only. Normal safety precautions and good working practice should be observed, to prevent damage or injury at all times. We welcome comments about our products and documentation.

Address on back cover of this guide

CONTENTS

EN1B-0014UK07 R0404

GAS LEAK DETECTOR INSTALLATION & USER GUIDE

1. INTRODUCTION

The Honeywell Refrigerant Gas Detection sensors, SN0500 (for refrigerant R404a) and SN0501 (for refrigerant R410) are used to detect the leakage of refrigerant gas and notify a monitoring system or provide a local indication (i.e. audible or visual signal).

Remedial action can then be taken to stop and replace the lost gas.

2. EXTERNAL CONNECTIONS

All external connections are made to the motherboard through a cable gland. A cable tie should be fitted within 20mm of the cable gland inside the enclosure. The connectors will accept wire of 0.5-1.5mm sq.

Note: Earth connection must be made when using the vented metal enclosure or Exd enclosure. The safety of this equipment is dependent on the integrity of the power supply and the earthing of the enclosure.

On power up the sensor may take some time (minutes up to hours) to fully normalize. You can monitor this by checking the 0-10V output as it falls towards zero. If during this normalisation period the red / yellow LED activates indicating the high / low level relay has switched then the reset button (see Fig. 1.) on the sensor must be pushed (if in latched position) after normalisation is complete.

Figure 1. External Connections

EN1B-0014UK07 R0404

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