Ducted and central recharge
AC refrigerant charging in Al Khalidiyah
In Al Khalidiyah, west Jeddah, central AC systems that cool some areas but leave others warm need accurate pressure and temperature readings before charging. Alrabih's team reads first, finds leaks, then vacuums and charges to the refrigerant type on 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 Khalidiyah is a mixed residential district with villas and mid-rise apartment blocks with open space between buildings. Most large villas and apartment blocks use central AC with copper pipes and complex air distribution ducts covering multiple rooms and halls or separate flats. When cooling varies between zones, the cause may be refrigerant loss from leaks in pipes or joints or poor air balance across vents in different rooms.
Al Khalidiyah is in west Jeddah, a developed residential area with villas and apartment blocks spread across ample space.
Most central systems in Al Khalidiyah need refrigerant charging when pressure drops or leaks are found in internal or external pipes.
The AC setup in Al Khalidiyah
- 1
Central system covering multiple villa or apartment wings
Most large villas and apartment blocks in Al Khalidiyah use a single outdoor unit with pipes distributed across multiple separate rooms and wings.
- 2
Copper pipes protected from sun with strong insulation
Outdoor pipes in Al Khalidiyah need thick thermal insulation to protect them from intense sun and heat throughout the day.
- 3
Evaporator units hidden in ceilings or walls
Indoor evaporator units are usually mounted inside suspended ceilings or walls for better aesthetics and to preserve open floor space.
Before the visit
Before our visit in Al Khalidiyah
- 1
Identify areas with weak cooling in your villa or apartment
Before the visit, tell us which wings or rooms cool weakly and which cool normally, so we can focus on the affected areas.
- 2
Describe the outdoor unit location and external pipes
Describe the outdoor unit location and external pipes, and tell us if they are exposed to direct sun all day, so we can prepare the right tools.
- 3
Ensure safe access to pipes and ducts
Make sure the team can safely reach internal and external pipes and ducts on the visit day, and note any restrictions or off-limits areas.
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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.
Certain rooms in my villa do not cool well, is this weak refrigerant?
The refrigerant may be adequate but distribution is unbalanced across vents, or there could be a leak in those room's pipes. We check pressure and temperature at different points to find the real cause before any charging.
My villa is large with very complex ducts, how do you measure refrigerant pressure everywhere?
We use pressure and temperature gauges at strategic points in the system, like the outdoor unit outlet and main duct inlets and in each wing, to pinpoint where leaks or pressure drops occur.
Al Khalidiyah is very hot, especially sun-exposed villas, does this affect how much refrigerant is needed?
Intense heat and direct sun exposure increase system load and refrigerant pressure, but the correct charge remains set to the unit's specifications, not outdoor temperature.
The outdoor pipes are exposed to sun and heat all day, do they affect the refrigerant?
Sun-exposed pipes may lose more cooling but refrigerant circulates in a closed loop. Leaks from joints or pipes damaged by sun and heat are the real cause of shortage, not the heat itself.
