AKO-55624 1 Channel Gas Detection Alarm Station Installation Guide
- October 30, 2023
- AKO
Table of Contents
5760H002 Ed.02
55624 1 Channel Gas Detection
Alarm Station
Installation Guide
AKO-55624 1 Channel Gas Detection Alarm Station
Use of the AKOGas alarm in refrigerated installations
AKO-55624 / 55724 series gas alarms have been designed to detect
refrigerator gas in refrigerated facilities.
There are two different alarm models, depending on the type of gas in use,
make sure you choose the correct version from the table below.
Detector location
The location of the detector is key to optimising leak detection, and several
factors should be born in mind to define it:
Type of refrigerant/s used
The type of refrigerant gas to be detected affects the choice of the type of
detector, and when different types of gas are used, you may have to use more
than one detector to make your facility safe. Look at the following table to
see each detector’s sensitivity.
| DESCRIPTION| GASES DETECTED| DEFAULT LEVELS| SECOND SET OF
LEVELS
---|---|---|---|---
PRE-ALARM| ALARM| PRE-ALARM| ALARM
AK0-57613| Gas detector for ammonia (R-717)| R-717 (NH₃/ ammonia)| 500 ppm|
1000 ppm| –| –
AKO-57614| Universal gas detector| R-134a, R-22, R-404A, R-407A, R-407C,
R-407F, R-409A, R-408A, R-410A, R-422A, R-422D, R-424A, R-434A, R-442A,
R-448A, R-449A, R-450A, R-452A, R-453A, R-507A, R-513A| 500 ppm| 1000 ppm|
1500 ppm| 3000 ppm
AKO-57615| Gas detector for CO₂ (R-744)| R-744 (CO₂)| 4000 ppm| 8000 ppm| 5000
ppm| 10000 ppm
AKO-55624| Alarm station with 1 input| Depending on the detector connected| –|
–| –| –
AKO-55724| Alarm station with 4 inputs| Depending on the detectors connected|
–| –| –| –
Environmental conditions
Some environmental conditions may affect the detector and trigger false
alarms, for example:
Smoke outlets located in confined spaces or from engines, generators or
motorised machinery (fork-lift trucks, etc.).
Rooms where solvents, paints or refrigerator gases are handled
Areas where fermentation and ripening processes of products (bread, pizza,
fruit, etc.) may occur.
Areas with strong ventilation (leaks are not detected due to high air renewal)
Please avoid installing the detector in the described areas, or in any case,
install it in a place where it is the least affected.
Avoid installing the detector near products or devices that might give off
CO₂.Human breathing near the detector may increase the level of CO₂ and
generate false alarms.
Keep the detector work environment free of chemical agents (solvent, paints,
alcohol, cleaning products, silicone and derivatives, ethylene, etc.).
Installation location
If the detector is installed in outdoor areas, it should be located in a place
protected from the rain, sun and inclemency of the weather in general, but
near to areas with possible leak sources (joints, valves, etc.), as a leak not
accumulating in a specific area is more probable in these areas.
If you install it inside a chamber, avoid placing it next to the evaporator,
as it will be affected by strong air currents, and a good place could be the
chamber’s recirculation exit, as if a leak occurs, the air currents will take
it there.
If the installation place is the compressor room, look for the place where gas
is most likely to accumulate, bearing in mind the environmental conditions and
attempt for it to be near to possible points with a risk of leaks (joints,
valves, etc.).
General standards
After choosing the location, please follow the standards listed below:
The detector should have a free area (without objects, cupboards, pipes, etc.)
with about 50 cm around it to allow the air to circulate, and be situated in a
place with the least risk of receiving knocks possible.
You should not pile up material near to the detector as it could hinder air
circulation, which will prevent leaks being correctly detected.
Taking into account the characteristics of the used cooling gas, the sensors
of the detectors used to control the concentration should be positioned at eye
height.
Advertencias
Detectors measure gas concentration in a point, if the gas leak does not reach
the detector, the alarm will not activate.
Detectors cannot supervise areas, and if perimeter supervision is required,
several detectors should be installed surrounding the area to be supervised.
Thoroughly studying the location of the detector/s is recommended, bearing in
mind the areas most sensitive to suffering leaks, the type of gas used, the
size and shape of the room, the air flows, the maintenance work, etc.
The detectors described have been designed to detect gas concentrations
capable of affecting the environmental conditions of the room (movement of
oxygen), and the detection of small coolant leaks is not guaranteed.
Pre-alarm and alarm relays
Application
The pre-alarm and alarm relays are designed to provoke a reaction in the
facility when they detect refrigerator gas to minimise possible problems it
may cause.
PRE-ALARM
Activation: Small gas concentrations, false detections caused by external
agents (CO2, solvents, etc.) or initial detection of higher concentrations.
The latter will cause a subsequent alarm activation as the gas concentration
increases.
Signalling:
Pre-alarm relay: As a rule, this will be used to activate the room’s forced
ventilation and this way rule out possible transitory leaks or false
detections.
Wiring
ALARM
Activation: Considerable gas concentrations in the facility may affect
personal safety and in the medium-term, damage the products stored in the
coldroom.
Signalling:
Alarm relay: Using this output
is recommended to stop the installation connecting the alarm relay in series
with the installation’s safety chain.
Wiring
* The input indicator
corresponding to the active detector will turn on.
** Depending on the configuration
AKO ELECTROMECÁNICA , S.A.L.
Avda. Roquetes, 30-38
08812 • Sant Pere de Ribes.
Barcelona • Spain.
www.ako.com
We reserve the right to supply materials slightly different to those described
in our Data Sheets.
Updated information in our web site.
355760002 REV .01 2023
References
Read User Manual Online (PDF format)
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