To Next PageTo Next PageWhat to do if the fans and compressor of my McQuay M5WM won't turn on?
If the fans and compressor aren't working, the issue might be a power failure or the power supply disconnect is off. Check the fuse or circuit breaker. Also, the delay timer may be set incorrectly; adjust the timer setting using the remote controller.
How to fix low airflow or insufficient cooling/heating in my McQuay M5WM Air Conditioner?
Low airflow or insufficient cooling/heating capacity might be caused by dirty air filters. Open doors or windows. Also, adjust the thermostat setting.
Why is there condensation on the return air grille of my McQuay M5WM’s indoor unit?
Condensation on the return air grille indicates high humidity or the set temperature is too low. Increase the temperature setting and operate the unit at high fan speed.
What to do if my McQuay M5WM has a bad odor?
A bad odor from the discharge airflow may be due to smoke, perfume, or other substances collected on the indoor coil. Clean the coil.
Essential safety warnings and cautions for installation and operation.
Steps for preparing copper tubing and making flare connections with torque specifications.
Details on wire gauge, number of wires, and fuse/breaker sizes for unit connections.
Wiring diagrams for cooling-only units, showing terminal block connections.
Wiring diagrams for heat pump units, detailing connections for 10 & 15 size.
Wiring diagrams for heat pump units, detailing connections for 20 & 25 size.
Procedure for removing air and moisture from refrigerant lines before charging.
Steps for adding refrigerant to the unit using a gas cylinder and weighing machine.
Common problems and their potential causes and treatments for unit malfunctions.
The McQuay M5WM Wall Mounted Split Type Air Conditioner (SEER 13) is a residential air conditioning system designed for efficient cooling and heating (for heat pump models). This manual provides comprehensive installation, operation, and maintenance guidelines to ensure optimal performance and longevity of the unit.
The M5WM series offers both cooling-only and heat pump configurations, providing flexible climate control for various environments. The system consists of an indoor unit, an outdoor unit, and remote control options (wireless standard, wired optional). It operates by circulating refrigerant between the indoor and outdoor units to absorb heat from the indoor air and release it outside during cooling, or vice versa during heating. Special features like Dry Mode, Hot Keep, Frost Prevention, and Auto Random Re-start enhance user comfort and system reliability.
The M5WM series includes several models with varying nominal cooling and heating capacities:
Cooling Only Models (Indoor Unit / Outdoor Unit / Nominal Cooling – BTUH):
Cooling/Heat Pump Models (Indoor Unit / Outdoor Unit / Nominal Cooling - BTUH / Nominal Heating - BTUH):
The system uses R410A refrigerant, a new HFC refrigerant that does not damage the ozone layer. This requires specific installation precautions due to its higher working pressure (1.6 times higher than R22). Copper tubing is used for refrigerant lines, with specific OD sizes depending on the model (e.g., 1/4" liquid tube, 3/8" to 5/8" gas tube). Maximum tubing length ranges from 40 to 50 ft, and maximum elevation is 16 to 26 ft, with up to 10 bends allowed. Additional R410A charge is required for tubing lengths exceeding 25 ft.
Electrical connections vary by model. Models 10F, 10FR, 15F, and 15FR use two separate power supplies: 115V/1Ph/60Hz for the indoor unit and 208-230V/1Ph/60Hz for the outdoor unit. Models 20F, 20FR, 25F, and 25FR use a single 208-230V/1Ph/60Hz power supply for both units. Wire sizes range from 12 to 14 gauge, and fuse/breaker sizes are 15 to 20 amps. NEC-approved electrical disconnects are required within sight of both units.
General| Brand | McQuay |
|---|---|
| Model | M5WM Series |
| Category | Air Conditioner |
| Language | English |
