Building Controls & BMS Installation
NLS Contractors installs building management systems and DDC controls on Saudi projects: field devices, controllers, network, graphics, integration, testing and handover. A package is priced from the point list or BOQ and built to ISO 16484 and BACnet (ASHRAE 135), for hospitals, campuses, towers and plants in Riyadh, Jeddah and the Eastern Province.
A BMS package is priced by points. Every sensor, actuator, status signal and alarm the system reads or drives counts as one point, and the point list in the consultant's BOQ sets the price. What you get for it is a set of DDC controllers at the plant and in the field, a network backbone, a supervisory server with graphics and trending, and the cabling and containment that tie them together.
The specification usually names ISO 16484 for building automation and BACnet (ISO 16484-5, ASHRAE 135) as the protocol, with Modbus for meters, drives and the packaged panels that chillers and generators arrive with. Integration scope deserves as much attention as the point count. Which third-party systems must the BMS read, which must it control, and which does it only monitor? A fire alarm panel is monitored, never controlled. A chiller plant is often both.
Hospitals add another layer. Operating theatres, wards and isolation rooms depend on air change rates and pressure relationships, and ASHRAE 170 sets the ventilation conditions for health care facilities. The BMS logs temperature, humidity and room pressure so the facility can show an audit what actually happened. Medical gas alarms and essential electrical systems under NFPA 99 usually come to the BMS as monitored points.
Commissioning is where BMS programmes slip, so the offer should show it. Point-to-point checks, functional tests of every sequence of operation, alarm tests, graphics sign-off and operator training all take site time, and they take it after every other trade thinks it has finished. NLS Contractors prices that time into the package and lists the handover set: as-built drawings, controller programs and backups, test records and O&M manuals.
A usable enquiry carries the point list or BOQ, the controls specification with sequences of operation, the protocol and integration schedule, the number of buildings and floors, and the programme dates. Controls hardware can come from NLS Power when the package is supply and install.
Related products
Frequently Asked Questions
How is a BMS installation priced in Saudi Arabia?+
By point count first, then by what sits around the points: integration, graphics, programming and commissioning. Send the point list from the BOQ and the offer states the count by type, what is included and what is excluded.
What is the difference between BMS, DDC and SCADA?+
DDC controllers are the programmable field devices that run a plant item or a zone. A BMS is the supervisory system built over them for a building. SCADA supervises process and utility assets such as water, power and oil and gas networks. A building contractor installs BMS and DDC.
Which protocol should the BMS use?+
Whatever the specification names. On most Saudi projects that means BACnet (ISO 16484-5, ASHRAE 135) for the main network and Modbus for meters and drives. Open protocols keep later expansion and service open to more than one vendor.
What documents come at handover?+
As-built drawings, point-to-point and functional test records, controller programs and backups, alarm schedules, O&M manuals and the operator training record.
Can you take a BMS package as a subcontractor to a main contractor?+
Yes. Most BMS packages reach NLS Contractors from main contractors subletting the controls scope. Send the BOQ and the specification clauses and the offer follows their numbering.