Services

Chiller System Installation

• Foundation & Placement: Chillers are highly heavy-duty systems. They must be installed on robust concrete housekeeping pads equipped with spring anti-vibration mounts to absorb dynamic machine noise and prevent structural transmission.
• Heavy Piping Network: Requires large-diameter carbon steel, galvanized iron, or copper pipes. Connections must be executed via structural welding or grooved mechanical couplings (e.g., Victaulic), supported tightly by heavy-duty pipe hangers.
• Thermal Insulation: All chilled water supply and return plumbing loops must be wrapped heavily with closed-cell elastomeric foam insulation to completely mitigate condensation ('sweating') and minimize energy transfer.
• Auxiliary Equipment: Requires direct integration with primary/secondary chilled water circulation pumps and corresponding open or closed-circuit cooling towers for water-cooled variants.

VRV / VRF System Installation

• Outdoor Unit (ODU) Placement: Positioned strictly on flat roofs or stable ground slabs using heavy rubber dampening pads. Adequate service clearances must be maintained for unhindered condenser air intake and heat rejection discharge.
• Copper Refrigerant Piping: Utilizes seamless, deoxidized refrigerant-grade copper lines running from the ODU. System branches must implement engineered Y-joints or Refnet joints to properly balance fluid delivery.
• Nitrogen Purging & Brazing: During copper brazing, installers must trickle Oxygen-Free Dry Nitrogen (OFDN) through the lines at minimal pressure to prevent internal oxide scaling which clogs highly sensitive electronic expansion valves (EEVs).
• Pressure Testing & Evacuation: The entire refrigerant envelope must hold nitrogen pressure at 550 PSI for a complete 24-hour static leak test, followed by a deep vacuum pull down below 500 microns before precision weighing of R-410A or R-32 refrigerant.
• Control Transmission Wiring: Units interact using a dedicated, non-polar 2-core shielded communication cable daisy-chained sequentially across the local network.

Fan Coil Unit (FCU) Installation

• Ceiling Suspension: Typically anchored within structural false ceilings using heavy threaded drop rods secured to the overhead concrete slab, integrated with inline vibration-damping rubber gaskets.
• Piping Interconnections: Chiller FCUs attach using flexible stainless steel braided hoses, manual isolation ball valves, dynamic balancing valves, and a 2-way or 3-way motorized modulating control valve. VRF FCUs join directly via flared mechanical fittings or brazed copper paths.
• Condensate Drainage Slopes: Gravity drain lines require an absolute continuous downward gradient of no less than 1:100. If space constraints obstruct a natural fall, an integrated low-profile condensate lift pump must be introduced.
• Ducting Isolators: For ducted installations, fire-retardant flexible acoustic canvas cuffs (100–300 mm length) must separate the FCU spigot from physical galvanized iron (GI) duct networks to halt structural acoustic transfer.

Industrial Chillers (Air-Cooled & Water-Cooled)

Chillers serve as the primary refrigeration source for large-scale developments. Due to their mechanical complexity, strict daily logging and water chemistry maintenance are paramount.

• Water Treatment Control: For water-cooled configurations, execute daily chemical analyses of condenser and chilled water loops to completely mitigate mineral scaling, rust corrosion, and bio-fouling.
• Evaporator & Condenser Tubes: Conduct annual mechanical tube brushing or targeted chemical descaling to maintain design heat-transfer coefficients.
• Spectrometric Oil Analysis: Analyze compressor lubricants semi-annually for metal particulate wear, high moisture content, or shifting acidity index levels.
• Operational Baseline Logs: Continuously log suction/discharge pressures, subcooling, superheat, and approach temperatures to isolate anomalies.

VRV / VRF Systems (Variable Refrigerant Volume/Flow)

VRV/VRF configurations couple multiple indoor expansion units with modular, inverter-driven outdoor compressors using centralized copper piping networks.

• Refrigerant Leak Protocols: Inspect all field-brazed joints, flare nuts, and distribution headers using electronic halogen leak detectors quarterly.
• EEV & Sensor Validation: Test electronic expansion valves (EEVs) along with thermistors to verify smooth modulation against variable space loads.
• Bus Communication Checks: Inspect, tighten, and shield the two-core non-polar transmission cables linking outdoor units to indoor PCB terminals.
• Inverter Ingress Protection: Clear debris from compressor heatsinks and ensure control panels remain completely free of moisture or dust build-up.

Fan Coil Units (FCU)

FCUs deliver terminal localized climate control. Because high volumes of these units are distributed throughout a facility, maintenance focuses on cleanliness and flood prevention.

• Air Filtration Protocols: Clean or replace light mesh/synthetic air filters every 30 to 90 days depending on space utilization metrics.
• Condensate Path Management: Flush shallow drain pans and clear structural U-traps. Deploy slow-release biocide tablets to stop slime accumulation.
• Modulating Valve Inspections: Cycle 2-way and 3-way motorized control actuators to ensure precise, tight water shutoff without thermal bypass leaking.
• Fan-Motor Integrity: Evaluate multi-speed fan assemblies for vibration, bearing friction noise, and structural securement.