MSA Chillgard m-100 Operating Manual

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CHILLGARD® M-100

Refrigerant Sensor

Operating Manual

Order No.: 10086391/02

For the Declaration of Conformity, please visit the product page on MSAsafety.com.

MSA Europe GmbH Schlüsselstrasse 12 8645 Rapperswil-Jona

Switzerland

MSA CONTENTS

Contents

1. Safety Regulations ................................................................................................................................................ 4

1.1. Correct Use .................................................................................................................................................. 4

1.2. Liability Information ....................................................................................................................................... 4

2. Description ............................................................................................................................................................. 5

2.1. Locating the Sensor ...................................................................................................................................... 6

2.2. Mounting the Sensor ..................................................................................................................................... 6

3. Calibration ............................................................................................................................................................ 11

3.1. Calibration Check ....................................................................................................................................... 11

3.2. Calibration Gases ....................................................................................................................................... 11

3.3. Calibration Procedure ................................................................................................................................. 12

4. Operation ............................................................................................................................................................. 13

4.1. Optical Indication ........................................................................................................................................ 13

4.2. Control Modules .......................................................................................................................................... 13

4.3. RS-485 Output Specifications ..................................................................................................................... 14

4.4. RS-485 Addressing (if applicable) ............................................................................................................... 15

4.5. Gas Selection Jumpers ............................................................................................................................... 15

5. Technical Specifications ..................................................................................................................................... 16

6. Ordering Information ........................................................................................................................................... 18

Chillgard M-100 3

SAFETY REGULATIONS MSA

1. Safety Regulations

1.1. Correct Use

MSA’s CHILLGARD present of the most common halogenated refrigerants in cold storage facilities, mechanical equipment rooms and other refrigerant applications.

It is imperative that this operating manual be read and observed when using the sensor. In particular, the safety instructions, as well as the information for the use and operation of the apparatus, must be carefully read and observed. Furthermore, the national regulations applicable in the user's country must be taken into account for a safe use.

Danger!

This product is supporting life and health. Inappropriate use, maintenance or servicing may affect the function of the device and thereby seriously compromise the user’s life.

Before use, the product operability must be verified. The product must not be used if the function test is unsuccessful, it is damaged, a competent servicing/maintenance has not been made, genuine MSA spare parts have not been used.

Alternative use, or use outside this specification will be considered as non-compliance. This also applies especially to unauthorised alterations to the apparatus and to commissioning work that has not been carried out by MSA or authorised persons.

1.2. Liability Informatio n

MSA accepts no liability in cases where the product has been used inappropriately or not as intended. The selection and use of the product are the exclusive responsibility of the individual operator.

Product liability claims, warranties also as guarantees made by MSA with respect to the product are voided, if it is not used, serviced or maintained in accordance with the instructions in this manual.

M-100 Refrigerant Sensor – hereinafter referred to as sensor – is designed to detect the

4 Chillgard M-100

MSA DESCRIPTION

2. Description

Fig. 1 Sensor Base and Cover

Check the label provided on the printed circuit board ( Fig. 1) to identify the assemble to order (ATO) code.

ATTENTION!

The sensor is set at the factory to detect only one defined type of gases ( ATO code). This setting can not be changed during use.

The sensor is available with a number of options including:

 Refrigerant gas detected  Temperature and Relative Humidity sensors  Output – current or voltage analogue output or RS-485 ModBUS digital output  De-icer option – for low temperature applications.

Chillgard M-100 5

1 Base

2 ATO Code

3 Cover

DESCRIPTION MSA

2.1. Locating the Sensor

Proper sensor location is necessary to ensure accurate measurement of representative air samples. Locate the sensor:

 Indoors in a room area where air circulates freely  On a flat, interior surface  Approximately 30 - 45 cm from floor.

Do not locate the sensor:

 Near heat sources, such as appliances, direct sunlight or concealed pipes or chimneys  On walls or structures subject to excessive vibration  In areas where air does not circulate freely, such as behind doors or in corners.

2.2. Mounting the Sensor

60.3

58.2

59.9

80.6

55.9

Fig. 2 Installation Dimensions

6 Chillgard M-100

MSA DESCRIPTION

WARNING!

The unit must always be powered by either a suitable UL 60950/CSA Certified power supply which is isolated from line voltage by double insulation, or an appropriately rated UL listed/CSA Certified Class 2 transformer. Failure to follow the above can result in serious injury or loss of life.

The sensor consists of two basic parts, the base and the cover ( Fig. 1). The cover incorporates the electronics with the sensing elements.

(1) Mark four holes as shown in Fig. 2.

(2) Drill holes of appropriate diameter for wall plugs.

(3) Remove the cover from the base and

(4) Attach base with screws of appropriate diameter.

(5) Fasten the base to a junction box or other support.

 The base has a number of openings to allow for mounting to various junction boxes. (6) Feed the power and signal wires through the rectangular opening in the base.

(7) Connect the wires to the terminal connector located in the base, as indicated in Fig. 3.

3. Calibration

3.1. Calibration Check

The sensor is designed to operate for long periods of time with no zero drift. However, the sensor should be checked periodically to verify that the unit detects refrigerant gas. The calibration check can be done with the use of the following MSA equipment:

 (P/N 603806) Polyurethane Tubing  (P/N 467896) 1.5 LPM regulator.

A calibration check of the sensor requires a supply of:  ZERO GAS (air or nitrogen) - Ambient air may be used if it does not contain refrigerant gas or an interfering

component

 SPAN GAS Cylinder comprised of 100 ppm of the refrigerant gas of interest.

3.2. Calibration Gases

Description Concentration

R-123 in Nitrogen 100 ppm

R-134a in Nitrogen 100 ppm

R-22 in Nitrogen 100 ppm

R-404a in Nitrogen 100 ppm

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CALIBRATION MSA

3.3. Calibration Procedure

CAUTION!

If any control instruments connected sensor are wired to external devices (e.g., horns, exhaust fans, and

fire suppression systems), these devices may activate during the following procedures. To prevent

activating these devices while adjusting the sensor, disconnect the wiring to the control device. Return all

wiring to the control device when the calibration procedure is completed.

To verify that the sensor is operating properly: (1) Deactivate any equipment connected to the outputs, or

disconnect the wiring of the outputs.

(2) With the tubing connected to the regulator and cylinder,

place tubing in the opening at the bottom of the sensor ( Fig. 6).

(3) Open the regulator and apply gas for a minimum of five

minutes.

(4) If the unit is operating properly, the red LED:

 illuminates when concentration level is > 50 ppm

 is visible through the calibration check opening.

(5) Turn OFF regulator and remove tubing from opening. (6) Allow gas level to return to normal. (7) Reactivate any equipment connected to the outputs or

reconnect the wiring to the outputs.

Fig. 6 Applying Calibration Gas

1 Regulator 1.5 LPM (P/N 467896) 2 Span Or Zero Gas Cylinder

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MSA OPERATION

4. Operation

4.1. Optical Indication

The sensor has three LEDs located at the bottom-left for quick unit status indication:

LED Indication

Green Lights during normal operation

Red Flashes at 0.5 Hz during start-up.

Turns ON solid when concentration reading exceeds 50 ppm

Yellow Flashes at 0.5 Hz when power supplied is outside limits.

4.2. Control Modules

The sensor output can be connected with a control module providing a complete monitoring system ( Operating Manual of the control module).

During a fault, the:

 current output drops to 2 mA or  voltage output drops to 1 V.

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Turns ON solid during other fault condition

OPERATION MSA

4.3. RS-485 Output Specifications

Fault and Module State 0x0000 1 Under Range 2 (msb)

Under Voltage 8 (msb)

Temperature 10 (msb)

Lamp Fail 40 (msb)

Test Mode 80 (msb)

Warm Up Complete 0 (lsb)

Cal/Setup 2 (lsb)

Factory Mode 4 (lsb)

Trouble Mode 8 (lsb)

Gas Number 0x0001 2 0 to 40 (see below)

Gas Concentration 0x0002 3 -20 to 1050 (ppm)

Temperature 0x002C 45 -300 to +650 (°C * 10)

Humidity 0x002D 46 0 to 100 (%RH)

Gas Numbers R-22 = 6,

R-123 = 12

Baud rate: 19,200; each byte is eight bits with no parity and two stop bits.

R-404a = 27

R-134a = 15

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MSA OPERATION

4.4. RS-485 Addressing (if applicable)

In Fig. 7 are shown the jumper settings for the 12 user configurable RS-485 addresses.

MODBUS ADDRESS JUMPER SETTINGS

J5 J4 J3 J5 J4 J3 J5 J4 J3

100

101 102

103

Fig. 7 Jumper Settings for the RS-485-Addresses

4.5. Gas Selection Jumpers

On R-22, R-404A and R-134A the gas of interest can be changed by altering the Position of jumpers J1 and J2 as shown in Fig. 8.

Fig. 8 Gas Selection Jumper Settings

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104

105 106

107

108

109 110

111

TECHNICAL SPECIFICATIONS MSA

5. Technical Specifications

Size 115.06 mm x 90,93 mm x 36.07 mm

Weight 160 g

Power Requirements 24 V DC, +20%, 24 V AC +20%, 50/60 Hz, Class 2, UL 60950/CSA certified

Power Consumption < 2.7 watts

Wiring up to 2,5 mm², Class 2 copper wiring

Output Options 4 to 20 mA sourcing, <500 Ohm load

Operating Temperature 0 to 65°C (-30 degrees lower temp specification with de-icer option)

Relative Humidity (RH) 0 to 99% non-condensing

Pressure Operating 700 -1080 hPa

Warm-up time 30 minutes

Pollution Degree 2

Installation Category II

Operating Range 0 to 1000 ppm

Limit of Detection 20 ppm

Minimum Alarm 50 ppm

2 - 10 V, 10 kOhm load RS-485 ModBUS RTU

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MSA TECHNICAL SPECIFICATIONS

Response Time t50 < 270 seconds

Repeatability ±10 ppm at 50 ppm

Linearity ±10 ppm from 25-50 ppm, +20% of reading from 50 to 1000 ppm

Temperature Sensor ±0.4°C at 25°C

Humidity Sensor ±3% RH at 50% RH and 25°C

Standard Gases *) R22, R123, R134a, R404a

Approvals

 CE approval, complies with the applicable LVD and EMC directives

(see also Declaration of Conformity)

 Certified to UL Std 61010-1 and CSA 61010

 Complies with ASHRAE 15-2004

*) Other gases are available. Please check with factory for availability.

Chillgard M-100 17

ORDERING INFORMATION MSA

6. Ordering Information

Description Part No.

R-22 in Nitrogen 10086542

R-123 in Nitrogen 10086543

R-134a in Nitrogen 10086544

R-404A in Nitrogen 10086545

18 Chillgard M-100

MSA ORDERING INFORMATION

Chillgard M-100 19

For local MSA

contacts, please visit us at MSAsafety.com