Page 28 - Towards A Sustainable Future , Phase 3 2025, E-Book_Neat

During the installation of new air conditioners, the technician
will perform leak testing with either an electronic leak detector
or soap solution to ensure there is no leakage. This process is
time-consuming as there are many joints and components in
the air conditioning system.

The technician will check the running current (Amperes)
if the air conditioner is operating at optimal condition. If
the running current is higher than the manufacturer's data,
components are overheating and drawing excessive current.
Table 2.3. FY2022 BMS & Daikin sales and carbon emissions
The technician will also check the operating pressure using
the manifold gauge to ensure the equipment is operating
Good Environmental Practices in optimal condition, and also ensure the air conditioner is
BMS and Daikin conduct in-house training for staff and not operating under low-pressure conditions and possible
partners to ensure they follow good practices in protecting leakages of refrigerant.
the environment and complying with government regulations.
Eco-solution 1
During maintenance, dismantling and disposal, technicians
will perform recovery of refrigerant processes to prevent any 1. SMART REFRIGERANT DETECTOR (SRD)
refrigerant from leaking into the environment. The recovered After several meetings with the Daikin engineering team and
refrigerant will be stored in the recovery tank (as shown in Fig. environmental review, the following solution was proposed
2.4) and passed to an authorised recycling local company (i.e. to reduce carbon emissions and ensure sustainability and
A-Gas) to process into reusable gas. efficiency. Our team proposed the Smart Refrigerant Detector
(SRD) prototype, as shown in Fig. 3.1, to detect low refrigerant
pressure conditions of the air conditioner during operation.
SRD comes with a variable pressure setpoint setting. It can
be applied to different types of air conditioning systems (i.e.
R22, R410A and R32). These air conditioning systems are
commonly used in Singapore's residential and commercial
buildings. Different refrigerants have different low-pressure
thresholds to indicate low-pressure conditions.

Fig 2.4. Refrigerant Recovery Process

Fig 3.1. Smart Refrigerant Detector (SRD)

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