AKO-575744, AKO-575400 V3 Gas Transmitter User Guide

AKO-575744, AKO-575400 V3 Gas Transmitter

Product Usage Instructions

• Installation Guidelines
  • Install in a place protected from vibrations, water, and corrosive gases.
  • Avoid areas classified as potentially explosive.
  • Install away from smoke outlets, damp areas, and strong ventilation.
  • Leave a distance of around 50 cm free around the sensor.
• Working Conditions
  • Avoid handling refrigerant gases near the sensor.
  • Avoid exposure to solvents, paints, or acetone vapors.
  • If handling refrigerant gases is unavoidable, use Set Hold or Maintenance mode.
• Usage Instructions
  • To mute Gas Pre-Alarm or Alarm sounds, press once.
  • Press for 3 seconds to activate/deactivate Set Hold mode.
  • Press for 6 seconds to activate/deactivate Maintenance mode.
  • In the programming menu, pressing once shows the gas type detected, date, and time sequentially.
• Display Information
  • The display provides information on gas detection, gas concentration, alarm modes, and system status.

FAQs

• Q: What should I do if the Gas Pre-Alarm or Alarm sounds?
  • A: Press once to mute the alarm tone. In the programming menu, it exits the parameter without saving changes, returns to the previous level, or exits programming.
• Q: How do I activate/deactivate Set Hold mode?
  • A: Press for 3 seconds to activate or deactivate Set Hold mode.
• Q: How do I activate/deactivate Maintenance mode?
  • A: Press for 6 seconds to activate or deactivate Maintenance mode.

MODELS

• AKO-575744
• AKO-575400

IMPORTANT SAFETY INSTRUCTION

Warning

• Transmitters/detectors should be installed in a place protected from vibrations, water, and corrosive gases, where the ambient temperature does not exceed the value indicated in the technical data.
• The transmitters/detectors are not suitable for areas classified as potentially explosive.
• Transmitters/detectors supervise a point and not an area. If the gas leak does not reach the sensor, or the level of concentration in that point does not reach the foreseen values according to the type of gas no alarm will be activated.
• If perimeter supervision is required, several sensors should be installed around that area.

Working conditions:

• Avoid handling refrigerant gases near the sensor. If this is unavoidable, use Set Hold or Maintenance mode. Do not paint the sensor or place it near solvents or paints.
• Exposure to acetone vapors may generate false alarms.
• The sensor should be installed away from:
  • Smoke outlets located in confined spaces or from engines, generators, or motorized machinery (forklift trucks, etc.).
  • Particularly damp areas or areas with strong ventilation.
• The detector should usually be installed in an area where gas may concentrate, near places where gas leaks could start
• The gases currently used in industrial refrigeration, for which this transmitter has been designed, are heavier than air.
• They are therefore always concentrated in the lowest part of the refrigerated room or space. Please consider this when choosing the installation site. It is advisable to leave a distance of around 50 cm free.

REMOTE FUNCTION

• Always disconnect the power supply to do the wiring.
• The wiring between the transmitter and the station must NEVER be installed in a conduit together with power, control, or power supply cables.
• Cables for wiring the relay contacts should have an adequate section depending on the unit to be connected.
• Certain international standards maintain that the power supply of the alarm should originate from a different circuit than that used by the refrigeration and ventilation system. Please ensure that you comply with current local regulations.
• If connecting to a MODBUS network the double connection strips included must be used (see box)

WIRING

Description

• Fixed: Gas pre-alarm activated.
• Flashing: Gas alarm activated.
• Fixed: Set Hold mode activated
• Flashing: Maintenance mode activated
• The display shows the type of gas detected.
• If the gas Pre-Alarm or Alarm sounds, pressing once will mute the alarm tone (See parameter b03). In the programming menu, it exits the parameter without saving changes, returns to previous level or exits programming.
• Pressing for 3 seconds activates or deactivates Set Hold mode. Pressing for 6 seconds activates or deactivates maintenance mode. In the programming menu it allows scrolling around the different levels, or during the setting of a parameter, changing its value. Pressing once (< 1 second) will show the type of gas detected, the date and time in sequential order.
• Fixed: CAMM module in operation
• Flashing: Malfunction in CAMM module
• Bluetooth activated (CAMM module only)
• The display shows the current gas concentration in ppm (parts per million).
• The value displayed should be multiplied by 10.
• Pressing for 3 seconds displays the Pre-Alarm and Alarm levels that have been configured. In the programming menu it allows scrolling around the different levels, or during the setting of a parameter, changing its value.
• Pressing for 3 seconds accesses the configuration of alarm and pre-alarm levels. Pressing it for 6 seconds accesses the advanced programming menu. In the programming menu, it accesses the level shown on the display or, during the setting of a parameter, accepts the new value.
• Gas alarm on mute
• Unit in programming mode.

Operation

Without alarms

• The display shows the current gas concentration in ppm.
• Parameter b02 allows you to fix a value below which the display will always show zero.

Alarms

• The transmitter emits an acoustic alarm, and the alarm indicator flashes and activates the relays when certain gas concentration levels are exceeded.
• If the transmitter is connected to a station, the station will emit an acoustic alarm. The relays will be activated in both devices.
• Two alarm levels depend on the concentration of gas detected: Pre-Alarm and Alarm. Both are factory preset but can be modified through parameters AL3 and AL6.
• These values comply with domestic and international regulations (RSIF, EN 378, and EN 14624).
• However, please ensure that these values comply with current local regulations. To modify these values, parameter AL1 should be configured to 1.

Technical specifications

• Power supply ……………………………………………………………….12 – 30 Vdc
• Consumption Typical ………………………………………………………….. 75 mA
• Maximum ……………………………………………………. 125 mA
• Pre-Alarm/Alarm relay ……………………………. SPDT 30 Vdc, 2 A, cos j =1

Working ambient temperature:

• AKO-575744 ……………………………………..-40 ºC to 50 ºC
• Other models ……………………………………..-30 ºC to 50 ºC

Storage ambient temperature:

• AKO-575744 ……………………………………..-40 ºC to 60 ºC
• Other models ……………………………………..-30 ºC to 60 ºC
• Range of maximum moisture permitted..0 – 95 % HR (without condensation)
• Protection degree ………………………………………………………………… IP 68
• Type of sensor …………………… NDIR (Non-Dispersive Infrared Technology)

Display range:

• AKO-575744 ………………………………….0 – 10000 x1 ppm
• Other models ……………………………………0 – 2000 x1 ppm
• Estimated working life ……………………………………………………….. 5 years
• Dimensions ………………………………. 202 mm (W) x 82 (H) x 55.5 mm (D)

Default parameters

To set the device to factory default, switch off the power supply and switch it on again, press the sequence, and SET within 2 minutes. The display shows the message dFp (default parameters) with a choice of two options:

• 0: Parameters are not modified
• 1: All parameters are reset to their default values.

Parameters

The unit operating parameters are organized into different groups or families according to their function. The Def. column indicates the default parameters set in the factory. To access the programming menu, hold the SET key for 6 seconds, or until ‘’PRG’’ appears on the display. To modify the Pre-Alarm and Alarm levels, press SET for 3 seconds or until “ ” appears on the display (Only if AL1=1).

• This allows you to scroll through the different levels, or when setting a parameter, to change its value.
• SET This accesses the level shown on the display or, when setting a parameter, it accepts the new value.
• ESC This exits the parameter without saving changes returns to the previous level, or exits programming.

Not valid for AKO-575744 / AKO-575744N / AKO-575744NR

1. To modify these levels, parameter AL1 should be configured to 1.
2. R-450A, R-442A, R-454A, R-454C, R-1234YF, R-1234ZE are detected using .
3. The MODBUS address will be shown on the transmitter label by default.

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