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General| Brand | McQuay |
|---|---|
| Model | SWP Series |
| Category | Air Conditioner |
| Language | English |
Wiring must comply with codes. Use copper wire for power leads. Unit has a standard power terminal block.
Disconnecting means required by NEC for AC equipment. Locate disconnect within 50 feet of the unit.
Units require three-phase power. Lists voltage tolerances for 60 Hz and 50 Hz. Power lead wire sizing rules.
Enclosed central control center with high and low voltage components. Lists main control board, sensors, etc.
Provides branch circuit, short circuit, disconnect, and overload protection for motors. Explains trip points and reset.
Breakers upstream of VFDs for short circuit protection. Not adjustable. Explains reset procedure.
Protects three-phase loads from power issues. Monitors voltage/phase, deactivates relay on harmful conditions.
Single pole pressure-activated device. Opens on pressure rise, de-energizing compressor. Manual reset via MicroTech III.
Single pole, pressure-activated device. Closes on pressure rise. Senses evaporator pressure, auto-reset.
Thermally protected compressors. Solid state protection device (MP1-MP6) located in junction box. Auto-resets.
Protects evaporator coils from freeze-up. Normally closed, open on temperature drop. Auto-reset, but three trips require manual reset.
Protects ductwork from over-pressurization. Unit de-energizes if pressure exceeds setting. Field-adjustable.
Protects against high voltage, phase imbalance, loss, and brownout. Indicator light ON when voltages are within limits.
System for maintaining evaporator pressure. Uses a pressure regulating valve to control refrigerant flow.
Protects hydronic coils from subfreezing temps. Shuts down unit if temp is too low. Field-adjustable set point.
Verifies condenser water flow before compressor operation. Locks out cooling if loss of flow is detected.
Factory-installed system for cooling with tower water when conditions are suitable. Uses economizer coil and control valves.
Factory-mounted, nonfused main circuit interrupter for disconnecting main electrical power.
Procedures for general unit start-up, including setting setpoints, placing unit in COOL ONLY mode, and starting fans.
Prepare for compressor operation with supply air fan running. Checks for three-phase power and potential issues.
Crucial adjustment for compressor performance. Set superheat between 10-12°F under full load, 6-8°F under reduced load.
Units use R-22 or R-407C. Improper charging can damage equipment. Follow specific charging procedures.
Checks unit start sequence, fan rotation, water temperatures, compressor operation, and electrical readings.
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