Tm44 air conditioning inspections, tm 44 inspections gas 78


TM 44 Air Conditioning Inspections are carried mostly out of visual observations of representative samples of the air conditioning equipment and other visual indicators such as refrigerant sight glasses, pressure, temperature or filter gauges. When any of these indicators are not available, the inspector may have to take some test readings.

All air conditioning inspectors need to adhere to the appropriate health and safety legislation. This includes pointing out any insufficient maintenance or neglect to building owner/operator’s attention which might be a hazard to the health and safely of the occupants of the building. gsa 2016 pay scale The TM 44 report also compares the size and appropriateness of the cooling plant against the cooling loads of the building together with the effectiveness of the existing maintenance regime.

The inspection process: As outlined by the EPBD Regulations, the inspection requires examination of the air conditioning system’s refrigeration equipment and the air movement systems and its controls. It also incorporates the examination of any documentation that may help to understand the systems better or provide information about previous maintenance regimes. The inspector also needs to make approximations whether the system is suitably sized for the cooling loads in the treated places give advice on how further improvements can be made.

The inspection report: The objective of the TM44 report is to ensure that the building owner or air conditioning operator is provided with adequate information that would allow him to have an understanding of the efficiency of the air conditioning systems for which they are responsible. The report also helps them to receive initial advice on how they can make their system more efficient and effective.

In an Air Conditioning Inspection, the inspector does not carry out maintenance and nor does he make any adjustment to the system and its controls. Only the above mentioned conditions are identified and it is shown in the inspection report. electricity in india voltage Then suggestions and recommendations are given to the operator so that the problems can be resolved to improve its efficiency.

Usually 3 units or 10% of the existing units are chosen during inspection. Normally, the inspector tries to identify the ones with the worse problems and conditions as samples although the recommendation might not apply for all the other similar units. The recommendations can range from cheap/cost-free procedures such as the washing or cleaning of filters to expensive solutions like replacing the entire unit.

We usually recommend and encourage the use of renewable energies like wind turbines, Photovoltaics, solar panels and CHP (combined heat and power) units. Recommendations such as sub metering do not affect energy consumption directly but it enables us to monitor the energy consumption for effectively and record the impact of the various improvement factors in the heating and cooling systems.

In TM44 inspection report we also provide recommendations such changing the building fabric or improving insulation by replacing single-glazing to double-glazing where appropriate together with the use of reflective coating and external shading where applicable. All these improvements help to reduce the cooling load which consequently helps to reduce energy consumption and CO2 in the air conditioning systems.

Some recommendations are based on the how effectively the system can be controlled and for this we usually recommend the use of a better controller benefits from a 7-day ON/OFF timer. If the system is already fitted with a good controller, we review the time and date, temperature and ON/OFF settings and compare it with the actual occupancy periods and designed environmental conditions. If there are inconsistencies, then these issues are noted in the Air Conditioning inspection reports.

Some of the most common issues that we come across on site during an air conditioning inspection are blocked filters and indoor grilles, blocked condensers or damaged fines, poor insulation around the pipes, very high or low temperature settings, heating and cooling operation at the same time, poor installation and maintenance, incorrect time and date, wrong or unsuitable controller, ice in the condensers and internal system failure.

In most of these cases, the installed unit is oversized therefore we perform a swift calculation to establish whether the system is oversized. electricity vancouver wa We use the rule of thumb to size the systems, if the system is oversized and old we recommend replacing with a smaller unit. If the system is new we suggest switching off a couple of units if more than one unit have been installed. As part of the ACI (TM44) inspection, we also check the quantity and type of refrigerant that is present in the system and based on that, we divide the system in 2 categories:

2. Ozone depletion gases such as R-22 or R-11. Under EC Regulation, these gases are classed as HCFC refrigerants and the Regulation aims to reduce the emission of HCFC. Under effect of EC Regulation 2037/2000, operators must ensure that air conditioning systems with 3kg or more of HCFC refrigerant must be checked for leakage by certified personnel on a regular basis (every year).

We also provide recommendation on systems bigger than 25kW. As outlined by the Pressure Systems Safety Regulations 2000, vapour compression refrigeration systems with an effective rated output of over 25kW requires a written scheme of examination. Users and owners of pressure such pressure systems are required to demonstrate that they know:

Refrigerant leakage is also a very important aspect of the ACI (TM44) report as well since all refrigerants have a negative impact on the environment and they are the principal cause ozone depletion in the atmosphere. gas efficient suv 2015 Older refrigerants such as R-22 and R-11 have a greater impact on the ozone layer compared to newer ones such as R-410a and R-407. As air conditioning inspectors we are responsible for examining the units for any leakages and identifying them by looking at oil stains on the pipes.

One of the other factors commonly seen on sites is poor insulation. Although it is unwritten, as a rule insulations around pipes should be replaced every 5 years. However, in most sites the insulation is never replaced and in some cases the insulation does not properly cover all the pipes. electricity billy elliot instrumental Energy losses from poorly insulated pipes are a major cause of energy loss.

While carrying out inspections, it is very common to see the formation of ice on the condensers. Evidence of icing on the fins indicates that the system is not functioning properly. This can result from heating and cooling operations at the same time, internal faults in the condenser, inaccurate sensors or blocked filters. This such cases, an expert is needed to examine the indoor and outdoor units and solve the problem.

During an air conditioning inspection, we also record the pipe temperatures (before the condenser when it comes back from the indoor unit and after the condenser when it gets re-circulated back to the indoor unit). This temperature difference indicates whether the unit is functioning properly or not. A very small difference (smaller than 10 C) and a huge difference (greater than 30) are signs of a faulty system. Exact figures of this temperature difference cannot be provided as reference as pipe temperatures are dependent on indoor and outdoor conditions.

A single indoor unit is connected by refrigerant duct to a single outdoor unit. The indoor unit can either be floor, wall or ceiling mounted. The unit may be reversible allowing operation as a heat pump, or electric resistance heating may be included. grade 6 electricity quiz These systems classed as Level 3 and relatively simple inspection procedures are usually considered adequate for these systems.

Multi Split Systems are systems in which one or multiple ‘outdoor units’ containing refrigeration and heat rejection equipment are connected to a number of ‘indoor units’ delivering cooling. They are also known as multi-split package units and consist of variable refrigerant flow (VRF) systems. The indoor components of these systems are known as ‘indoor’ units or ‘cassettes’.

Variable Refrigerant Flow (VRF) Systems – These systems include a number of indoor units which are connected to a common outdoor unit by a refrigeration duct on a common network. The indoor units can either be floor, wall or ceiling mounted. Each indoor unit is capable of providing either cooling or heating operations allowing heat transfer between zones that require cooling to zones that require heating with the outdoor unit functioning as a heat rejection device or in heat pump mode as necessary.

Such systems consist of indoor and outdoor units that are both encased in a self-contained ‘unitary’ housing and are often installed ‘through the wall’. The unit may also be reversible allowing operation as a heat pump or electric resistance heating may be included. electricity and water These systems classed as Level 3 and relatively simple inspection procedures are usually considered adequate for these systems.

The cooled air distribution system may also include a floor or ceiling plena. This category includes systems where the air feed via the centralised ducted system may be cooled at active or passive terminal devices in the conditioned spaces. This cooling can be achieved by indoor units of split package and VRF systems installed within the air distribution pipes.

Centralised Cooled Water Systems – A central device is used to produce cooled water and is fed to active and passive terminal devices through ductwork in the conditioned spaces. The active terminal units could either be fan coil units or fan assisted chilled beams while the passive units could be chilled beams (without fans) and chilled ceiling panels. electricity consumption Terminal units may transfer cooling to recirculated room air, to fresh air drawn locally from outdoors, or to air supplied through centralised duct systems.

Water Loop/Reversible Heat Pump Systems – these are systems with their own separate reversible water to air heat pumps in the treated space. These systems extract or return heat to or from a common temperature controlled water loop, which is also known as ‘versatemp type’. The unnecessary heat is intentionally lost as necessary by a cooling tower ( usually a dry cooler) and an overall requirement for heat in the cycle is supplied by a central heat generator (fossil fuel boiler, electric flow boiler or other central heat exchangers).