Mini-Split System

Perform residential load calculation in accordance with the current version of ANSI/ACCA Manual J (Residential Load Calculation) or equivalent using interior design temperatures of 75 degrees for cooling and 70 degrees for heating

Perform commercial load calculation in accordance with the current version of ANSI/ACCA Manual N (Commercial Load Calculation) or equivalent using interior design temperatures of 75 degrees for cooling and 70 degrees for heating

Room by room load calculations will be performed when installing multiple indoor units

Calculated loads based on post-retrofit dwelling characteristics

Select residential equipment in accordance with the current version of ANSI/ACCA Manual S (Residential Equipment Selection) or equivalent

Select commercial equipment in accordance with the current version of ANSI/ACCA Manual CS (Commercial Applications, Systems and Equipment) or equivalent

Select system that is ENERGY STAR^® certified or equivalent

Select outdoor units that are corrosion-protected for marine climate zones

When applicable, supply multiple indoor units with a single outdoor unit using manufacturer specifications to determine allowable overage of indoor unit capacity in relation to the outdoor unit and derated capacity of indoor units based on outdoor design temperature

When applicable, select units that offer ducting options (e.g., ceiling cassette units have a knock out for a 5" or 6" duct) and/or have an outdoor air intake

Locate unit with manufacturer recommended clearance on all sides and to allow service access according to applicable code

Situate outdoor unit on a non-wicking equipment pad

Ensure unit is level, plumb, stable, and elevated a minimum of 6" above snow line

Install outdoor unit according to manufacturer specifications and applicable building code (e.g., IRC, IMC, IBC) and ANSI/ACCA Standard 5 (HVAC Quality Installation Standard)

Locate indoor unit(s) to provide effective airflow to desired locations without exceeding the manufacturer specifications for refrigerant line total length

Maintain clearances in accordance with manufacturer specifications

Install indoor unit(s) according to manufacturer specifications and applicable building code (e.g., IRC, IMC, IBC) and ANSI/ACCA Standard 5 (HVAC Quality Installation Standard)

Insulate concealed ceiling cassette unit(s) to a minimum of R-6 when contained inside a building cavity, (even when inside the thermal boundary) without hindering access to serviceable parts

Insulation must include a sealed vapor retarder layer

Securely mount indoor unit(s) according to manufacturer specifications ensuring condensate drainage is correctly sloped

Install electrical wiring according to NFPA 70, and

Provide an electrical disconnect within site of the outdoor unit

Install all high voltage wiring inside of protective conduit and approved junction boxes, no wiring connections (high or low voltage) will occur outside of appropriate junction box

Locate all intakes/terminations in compliance with manufacturer specifications and applicable building code

Install equipment connections (e.g., electrical service, condensate drains, ductwork, refrigerant lines) to allow for necessary service and repair access to all portions of the equipment

When applicable, install ducting per the manufacturer specifications in runs that do not exceed 6' per run

Insulate all ducts, including those inside the thermal boundary, to a minimum of R-6 with insulation that includes a sealed vapor barrier

Total equivalent length of refrigerant piping will not exceed system manufacturer specifications

Install refrigerant piping according to SWS detail "Refrigerant Piping"

Install refrigerant charge according to SWS detail "Refrigerant Charge"

Install wall mounted thermostats that are not within the direct airflow of the indoor unit

Install an independent condensate drain for each indoor unit according to SWS for "Condensate Disposal"

Install a float switch in the drain pan that interlocks with the cooling system power to turn unit off when pan is not draining

Pipe condensate to a properly sized sanitary drain or the outdoors

When there is potential for condensation or freezing of the drain line, insulate condensate drain lines to a minimum of R-4 with insulation that contains a Class II or greater vapor retarder

Provide occupants/owners with user's manual, warranty information, installation instructions, and installer contact information