Ducted and central recharge
AC refrigerant charging in Al Rabiyah
In Al Rabiyah, south Jeddah, the central AC systems in modern villas and residential blocks need precise pressure and temperature readings before any refrigerant charge. We check for leaks first, then vacuum the system and charge it with the correct refrigerant type from the unit's nameplate.
- Accurate pressure readings
- Charge recovery
- Nameplate-type charge
Clients We're Proud to Serve
Organisations and companies that trusted Alrabih with their projects.
When your system needs a refrigerant charge
- 1
Uneven cooling across zones
One office or floor feels hot while the rest of the building is cool. Before adding any refrigerant, the technician reads pressures and temperatures at several points to confirm that a low charge is actually the cause.
- 2
After a repair or component swap
Replacing a compressor, a valve or any part that opens the circuit means the old charge escapes. It must be recovered with a dedicated machine, then the line is vacuumed and recharged after the repair is done.
- 3
A system restarted after long shutdown
A central or rooftop unit shut down for a full season in Jeddah's salty coastal air may have lost part of its charge. We verify with pressure readings before adding anything, and look for a leak if the readings point to one.
Who it's for
Your villa's ducted system has lost its cooling
We read system pressures and line temperatures, find any leak in the long pipe runs, then vacuum and charge to the refrigerant type on the unit nameplate.
Ask on WhatsAppYour building's rooftop unit cools unevenly across floors
We inspect the system and its drawings, measure pressures and temperatures at multiple points to find the cause, then recover the old charge if a repair is needed and recharge to the nameplate type only.
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What the charging work covers
- Suction and discharge pressure readings
- Liquid and suction line temperatures
- Old refrigerant charge recovery
- Line vacuum before recharging
- Charge to nameplate refrigerant type
How we work
How we work
- 1
System check and readings
The technician checks the unit nameplate and system drawings, then reads suction and discharge pressures and line temperatures to judge the actual charge condition.
- 2
Find and fix the leak
If readings show a low charge, the technician finds the leak in the long line set, joints or components, and repairs it before any refrigerant is added.
- 3
Recovery and vacuum
The remaining old charge is recovered with a dedicated recovery machine, then a vacuum pump removes all air and moisture from the line before the new charge goes in.
- 4
Charge and verify
The system is charged with the refrigerant type on the nameplate only, never mixed with another type, then pressures are read again and cooling is checked across all zones.
Careful charge or a random top-up?
| Alrabih | The usual way | |
|---|---|---|
| Diagnosing the cause | Pressures and temperatures first | Add refrigerant straight away |
| The leak | Found and fixed before charging | Left to repeat the problem |
| Old charge | Recovered by machine | Vented to atmosphere |
| Refrigerant type | Nameplate type, no mixing | Whatever is to hand |
| Long line sets | Joints checked along the full run | Checked at the unit only |
Everything your AC needs, from one team
From system design and duct fabrication to installation, commissioning and maintenance.
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Some of our work
Ductwork, rooftop units and diffusers, from work we've completed in Jeddah.
Customer reviews
What our customers say
- Muhammadramzan 2641
“MashaaAllah. Services are so good. Behaviour and kindness 100/100. Prices are less then Market. Fully recommended”
- shahzeb armani
“Wow. Prices are so comfortable. Outstanding services. People are so talented and nice”
- Tawfik AlyawerLocal Guide
“U can find all u need for air conditioning”
Your satisfaction matters to us! If you had a great experience with us, we'd love a 5-star rating and a kind review.
Worked with us? Leave a reviewService areas
We come to you anywhere in Jeddah
From Al Shiraa and Al Yaqout in the north to Al Thaghr and Al Quraiyat in the south, with our base in Al Aziziyah.
What sets this district apart
Al Rabiyah is a relatively modern residential district dominated by villas and mid-rise apartment blocks with hidden central AC ducting in the ceilings, which means leaks can go unnoticed for weeks. When some rooms cool less than others, the resident may assume the system needs more refrigerant, but the reality is often a small leak or a distribution damper fault, so we always start with pressure and temperature readings before any charge.
Al Rabiyah is in south Jeddah, a modern residential zone of villas and apartment blocks with hidden central AC.
Most villas and blocks here use multi-zone central systems that require separate pressure readings for each zone.
The AC setup in Al Rabiyah
- 1
Multi-zone central system
Most villas and blocks in Al Rabiyah use a single central unit with a distribution damper panel to split flow between zones, requiring separate pressure checks per zone.
- 2
Hidden copper piping in ceilings
The copper runs are usually hidden behind plasterboard or suspended ceilings, making leak tracing harder and requiring precise pressure testing.
- 3
One or more outdoor units
There may be one large outdoor unit or multiple units depending on the villa size, and each requires separate pressure reading.
Before the visit
Before our visit in Al Rabiyah
- 1
Switch off the AC before our visit
Make sure the central system is fully off before we arrive, so we can take accurate pressure and temperature readings unaffected by unit operation.
- 2
Provide access to the outdoor unit
The outdoor unit is usually on the roof or back garden. Make sure the team can access it easily with their equipment.
- 3
Point out the distribution damper or filter location
If the damper panel or main filters are in an attic or hidden cupboard, tell us where before the visit to speed up the inspection.
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FAQ
Questions about AC refrigerant charging
Why can't a second refrigerant type be mixed into a ducted system?
Every refrigerant type is matched to a specific compressor, lubricating oil and operating pressures. Mixing two types shifts the pressures and contaminates the oil, straining the compressor and ruining cooling performance. We read the nameplate type and use only that.
Can a rooftop unit be recharged without shutting the whole building down?
In most cases one rooftop unit can be worked on while the others keep running, but this depends on how the system is designed and how many units it has. The technician reviews the system drawings at the survey and decides the approach that causes least disruption.
What do pressure and temperature readings tell you about a central AC system?
Suction pressure and gas line temperature show how well the evaporator coil is absorbing heat, while discharge pressure and liquid line temperature reveal condenser performance. Comparing both sets against the manufacturer's values shows whether the charge is low, high or whether another component is the real problem.
Why is the old charge recovered rather than just released?
Releasing refrigerant to the air damages the ozone layer and is prohibited. Recovery keeps the gas for proper recycling or disposal. In large systems the charge is substantial, so recovery both protects the environment and avoids losing a costly material before the repair is complete.
How does charging a ducted system differ from charging a standard split unit?
A ducted system has much longer refrigerant line sets and a larger charge, so a shortage takes longer to appear and leak-finding covers a much greater length of pipe and joints. Pressure readings must also be compared against the manufacturer's values for the whole system, not just a single indoor unit.
Some rooms in my villa are cold, others warm. Do I need more refrigerant?
Not necessarily. There may be a small leak in the hidden ductwork or a damper fault in the distribution panel. We read pressure and temperature in each zone first to pinpoint the issue before any charge.
The AC wiring runs hidden in the ceiling, does that complicate the check?
It does not complicate the initial check, but if we need to trace a leak in the copper piping, we may need permission from the owner or building management to open ceiling panels to reach connection points.
Does Jeddah's high humidity affect how much refrigerant the system needs?
No, the refrigerant quantity is set by the unit's specifications alone, but high humidity increases the condenser load, which may raise condensing pressure slightly, and that is what we monitor in the readings.
How long does the full vacuum and charge process take?
It depends on the length of the ductwork and system size. We always start with pressure, temperature and leak detection, which alone may take an hour or more before the charge itself.
