Week 4 Install MOD Split Systems

Why it is important to properly plan the installation of a residential split system air conditioner?

• Proper planning allows for an efficient and trouble-free installation. Without proper planning costly mistakes can occur, increasing the installation costs for the installing contractor.

• “If you fail to plan, you are planning to fail!”

  ―Benjamin Franklin

What should a technician reference before installing a system?

• The manufacturer's installation manual.

• His or her school book

What is the industry standard for determining the heat gain of a residential structure?

• ACCA's Manual J.

• Manual S

• 6 inch does a 150 sq ft room

What happens if a system is oversized for its application?

• An oversized system will not run long enough to properly dehumidify the structure.

• Short cycling will cut the life of the system

What is the minimum SEER rating for new systems?

• 14 Seer

• Book is wrong

What is the name of the outdoor rated, water tight, flexible electrical cable connecting the system's disconnect to the condensing unit?

• Whip.

• With liquid tight connectors

What gauge thermostat wire is typically used on residential systems?

• 18 gauge, cannot be stranded

• 18 Gauge Stranded

Where should an outdoor condensing unit not be located?

• Do not install a unit were the operating noise will be objectionable to the customer or their neighbors; avoid locating the unit in direct sunlight; do not locate where water, snow, or ice from the roof or eaves can fall directly on to the unit or where the roof overhang can cause recirculation of the air exhausted from the unit; do not locate under decks or porches.

• Check manual for clearances

Normally what is the maximum length a line set can be run on many residential spilt system air conditioners?

• 175 Feet

• 25 Feet

• 75 Feet

How should a technician determine the diameter of the line set to use?

• Always follow the recommendations of the equipment manufacturer; the required line sizes will normally be given in the installation manual shipped with the equipment.

• A ruler

• A Caliper