ICC M2 flashcards
ICC M2 · Build recall with a focused review session.
31 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Permit required for replacement
- Replacing a mechanical appliance or system generally requires a permit, while ordinary repairs that do not involve fuel or electrical connections may be exempt.
- Rough-in inspection timing
- Rough-in inspection must occur after the installation of ductwork, piping, and equipment but before any of it is concealed by building finishes.
- Listed and labeled
- Equipment and materials must be tested by a recognized agency and bear a label showing compliance with a standard; field modification voids the listing.
- Manufacturer instructions govern
- Where the code is silent on an installation detail, the manufacturer's published installation instructions control and must be followed for the listed appliance.
- Accessibility requirement
- Appliances must be reachable for inspection, service, repair, and replacement without cutting or removing permanent parts of the building structure.
- Garage ignition source height
- In garages, burners and ignition sources of appliances must be at least 18 inches above the floor unless the appliance is specifically listed for a lower height.
- Attic furnace platform
- An attic or under-floor furnace needs a level service platform and a clear passageway sized to allow service of the burner, controls, and heat exchanger.
- Clearance reduction shield
- Reduced clearance to combustibles is allowed only with an approved shield or method, and the resulting clearance must match the listing or code table.
- Prohibited return air sources
- Return air may not be drawn from bathrooms, kitchens, garages, or unconditioned attics unless specific code conditions for that source are satisfied.
- Condensate drain requirements
- Cooling coils require a trapped condensate drain with proper slope and, where required, a secondary drain or auxiliary pan with a drain.
- Duct sealing class
- Duct systems must be sealed to the required leakage class, with joints, seams, and connections sealed using approved tape, mastic, or gaskets.
- Duct insulation vapor retarder
- Ducts located in unconditioned space need insulation with the vapor retarder on the warm side to prevent condensation on the duct surface.
- Bath and kitchen exhaust
- Exhaust from bathrooms and kitchens must discharge outdoors through an approved termination and may not discharge into an attic or crawl space.
- Fire damper at rated assembly
- Where a duct penetrates a fire-rated wall or floor assembly, an approved fire damper must be installed per its listing to maintain the rating.
- Flexible duct support
- Flexible duct must be supported at the spacing required by its listing, kept from excess sag, and limited in length and bend radius.
- Outdoor air ventilation rate
- Mechanical ventilation must supply outdoor air at the rate set by the code for the occupancy type, based on occupant load and floor area.
- Two-opening combustion air
- Indoor combustion air uses two permanent openings, one within 12 inches of the top and one within 12 inches of the bottom of the enclosure.
- Indoor air opening free area
- For the two-opening method, each opening needs at least 1 square inch of free area per 1,000 Btu/h of total input, with a 100 square inch minimum.
- Vertical duct outdoor air
- When combustion air openings connect to outdoors through vertical ducts, each opening must have free area of at least 1 square inch per 4,000 Btu/h.
- Horizontal duct outdoor air
- When combustion air openings connect to outdoors through horizontal ducts, each opening must have free area of at least 1 square inch per 2,000 Btu/h.
- Single opening combustion air
- A single permanent opening near the top of the enclosure may supply combustion air if it has free area of at least 1 square inch per 3,000 Btu/h.
- Vent connector slope
- A vent connector for a Category I appliance must slope upward toward the chimney or vent at not less than 1/4 inch per foot of run.
- Chimney lining
- A chimney must be lined with an approved material and sized to the appliance; an oversized flue promotes condensation and weak draft.
- Type B vent clearance
- Listed Type B vent maintains its clearance to combustibles as stated on the label; single-wall connectors need greater clearance unless shielded.
- Refrigerant piping protection
- Refrigerant lines must be supported, protected from damage, and joined with approved fittings; brazed joints require proper purging during installation.
- Refrigerant quantity limit
- The allowable refrigerant charge in an occupied space depends on the refrigerant safety classification and the volume of that space.
- Boiler relief valve discharge
- A boiler pressure-relief valve must not be capped or reduced and must discharge by gravity to a safe location where discharge causes no injury.
- Hydronic air elimination
- Hydronic systems require expansion control, air-elimination devices, and relief protection to operate safely and avoid air-bound loops.
- Gas piping leak test
- Fuel gas piping must be tested for leaks with air or inert gas at the specified pressure and duration before being placed in service.
- Gas sediment trap
- A sediment trap is required at the appliance connection to capture debris and protect the appliance controls from contamination.
- Fuel gas pipe sizing
- Gas piping must be sized using the total connected load and allowable pressure drop so every appliance receives adequate pressure at full demand.