Ducted and central recharge
AC refrigerant charging in Al Shati
In Al Shati, north Jeddah, modern villas and apartment blocks have distributed central AC, and refrigerant charging requires careful pressure and temperature measurement before any addition.
- 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 Shati is a modern coastal district mixing standalone villas with mid-rise apartment blocks. Homes here rely on unified central AC for large areas, and uneven cooling across rooms often stems from a refrigerant leak or distribution valve fault, not necessarily low refrigerant. Pressure and temperature readings pinpoint the actual problem before charging.
Al Shati sits on Jeddah's northern coast, a modern area mixing villas and mid-rise apartment buildings with open spaces.
Most residential units in Al Shati have one central compressor feeding distribution ducts across multiple rooms and floors.
The AC setup in Al Shati
- 1
Central compressor with ducts serving multiple units
Apartment buildings in Al Shati may share one compressor with ducts serving each unit, requiring precise measurement of refrigerant pressure in each section.
- 2
Independent villas with their own outdoor unit
Standalone villas in Al Shati have completely separate outdoor units, making refrigerant and pressure issues easier to diagnose.
- 3
Copper lines with accessible test ports
Most modern Al Shati homes have dedicated test ports on copper lines, allowing easy monitoring of refrigerant pressure.
Before the visit
Before our visit in Al Shati
- 1
Ensure safe access to the outdoor unit
Tell us if the unit is on the roof or in a shared yard, and make sure there are no obstacles or safety hazards before the visit.
- 2
Turn off the AC an hour before
Switch off the system in advance to reduce pressure and allow more accurate readings when the team arrives.
- 3
Coordinate with building management if needed
If the outdoor unit is shared or on a communal roof, notify building management of the visit time in advance.
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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.
The living room is cold but the bedrooms are warm. Is that low refrigerant?
Not always. It could be a leak in the bedroom duct or a partially blocked distribution valve. We measure pressure at different points to identify the cause.
Does sea salt near Al Shati corrode the copper lines?
Yes, salty air accelerates corrosion on copper lines, causing slow leaks. We inspect exposed tubing closely during pressure checks.
Does coastal humidity affect pressure and temperature readings?
Humidity affects condensing efficiency, which may change temperature readings. We always measure under actual operating conditions and account for outdoor humidity.
The apartment block has several units. How do you access the outdoor unit?
We coordinate with the building management to locate the shared or individual outdoor unit, usually accessed from the roof or private yard.
