- Outside Air Intake
- Location
- Open during occupied hours?
- Unobstructed?
- Standing water, bird droppings in vicinity?
- Odors from outdoors? (describe)
- Carryover of exhaust heat?
- Cooling tower within 10m?
- Exhaust outlet within 10m?
- Trash compactor within 10m?
- Near parking facility, busy road, loading dock?
- Bird screen
- Unobstructed?
- General condition?
- Size of mesh? (12mm minimum)
- Outside Air Dampers
- Operation acceptable?
- Seal when closed?
- Actuators operational?
- Outdoor Air (O.A.) Quantity (Check against applicable codes.)
- Minimum % O.A.
- Measured % O.A.
- Note day, time, HVAC operating mode
- Maximum % O.A.
- Is minimum O.A. a separate damper?
- For VAV systems: is O.A. increased as total system air-flow is reduced?
- Mixing Plenum
- Clean?
- Floor drain trapped?
- Airtightness
- Outside air dampers.
- Return air dampers.
- Exhaust air dampers.
- All damper motors connected?
- All damper motors operational?
- Air mixers or opposed blades?
- Mixed air temperature control setting
- Freeze stat setting
- Is mixing plenum under negative pressure? Note: If it is under positive pressure, outdoor air may not be entering.
- Filters
- Type
- Complete coverage? (i.e., no bypassing)
- Correct pressure drop? (Compare to manufacturer's recommendations.)
- Contaminants visible?
- Odour noticeable?
- Spray humidifiers or air washers
- Humidifier type
- All nozzles working?
- Complete coil coverage?
- Pans clean, no overflow?
- Drains trapped?
- Biocide treatment working?
- Note: Is MSDS on file?
- Spill contaminant system in place?
- Face and bypass dampers
- Damper operation correct?
- Damper motors operational?
- Cooling Coil
- Inspection access?
- Clean?
- Supply water temperature.
- Water carryover?
- Any indication of condensation problems?
- Condensate drip pans
- Accessible to inspect and clean?
- Clean, no residue?
- No standing water, no leaks?
- Noticeable odor?
- Visible growth (e.g., slime)?
- Drains and traps clear, working?
- Trapped to air gap?
- Water overflow?
- Mist Eliminators
- Clean, straight, no carryover?
- Supply fan chambers
- Clean?
- No trash or storage?
- Floor drain traps are wet or sealed?
- No air leaks?
- Doors close tightly?
- Supply fans
- Location
- Fan blades clean?
- Belt guards installed?
- Proper belt tension?
- Excess vibration?
- Corrosion problems?
- Controls operational, calibrated?
- Control sequence conforms to design/specifications? (describe changes)
- No pneumatic leaks?
- Heating Coil
- Inspection access?
- Clean?
- Contol sequence conforms to design/specifications? (describe changes)
- Supply water temp.
- Discharge thermostat? (air temp. setting)
- Reheat Coils
- Clean?
- Obstructed?
- Operational?
- Steam humidifier
- Humidifier type
- Treated boiler water
- Standing water?
- Visible growth?
- Mineral deposits?
- Control setpoint
- High limit setpoint
- Duct liner within 5m? (If so, check for dirt, mold growth.)
- Supply Ductwork
- Clean?
- Sealed, no leaks, tight connections?
- Fire dampers open?
- Access doors closed?
- Lined ducts?
- Flex duct connected, no tears?
- Light troffer supply?
- Balanced within 3-5 years?
- Balanced after recent renovations?
- Short circuiting or other air distribution problems? Note location(s)
- Pressurized Ceiling
- Supply Plenum
- No unintentional openings?
- All ceiling tiles in place?
- Barrier paper correctly placed and in good condition?
- Proper layout for air distribution?
- Supply diffusers open?
- Supply diffusers balanced?
- Noticeable flow of air?
- Short circuiting or other air distribution problems? Note location(s.)
- Terminal equipment (supply)
- Housing interiors clean and unobstructed?
- Controls working?
- Delivering rated volume?
- Balanced within 3-5 years?
- Filters in place?
- Condensate pans clean, drain freely?
- VAV Box
- Minimum stops %
- Minimum outside air %
- Minimum airflow cfm
- Minimum outside air cfm
- Supply setpoint
- Summer
- Winter
- Thermostats
- Type
- Properly located?
- Working?
- Setpoints
- Summer.
- Winter.
- Space temperature
- Humidity Sensor
- Humidistat setpoints % RH
- Dehumudistat setpoints % RH
- Actual RH %
- Room partitions
- Gap allowing airflow at top?
- Gap allowing airflow at bottom?
- Supply, return each room?
- Stairwells
- Doors close and latch?
- No openings allowing uncontrolled airflow?
- Clean, dry?
- No noticeable odors?
- Return Air Plenum
- Tiles in place?
- No unintentional openings?
- Return grilles?
- Balancing capability?
- Noticeable flow of air?
- Transfer grilles?
- Fire dampers open?
- Ducted Returns
- Balanced within 3-5 years?
- Unobstructed grilles?
- Unobstructed return air path?
- Return fan chambers
- Clean and no trash or storage?
- No standing water?
- Floor drain traps are wet or sealed?
- No air leaks?
- Doors close tightly, kept closed?
- Return fans
- Location
- Fan blades clean?
- Belt guards installed?
- Proper belt tension?
- Excess vibration?
- Corrosion problems?
- Controls working, calibrated?
- Controls sequence conforms to design/specifications? (describe changes)
- Exhaust Fans
- Central?
- Distributed (locations)
- Operational?
- Controls operational?
- Toilet exhaust only?
- Gravity relief?
- Total powered exhaust cfm
- Make-up air sufficient?
- Toilet Exhausts
- Fans working occupied hours?
- Registers open, clear?
- Make-up air path adequate?
- Volume according to code?
- Floor drain traps wet or sealable?
- Bathrooms run slightly negative relative to building?
- Smoking lounge exhaust
- Room runs negative relative to building?
- Print room exhaust
- Room runs negative relative to building?
- Garage ventilation
- Operates according to codes?
- Fans, controls, dampers all operate?Garage slightly negative relative to building?
- Doors to building close tightly?
- Vestibule entrance to building from garage?
- Mechanical rooms
- General condition?
- Controls operational?
- Pneumatic controls
- Compressor operational?
- Air dryer operational?
- Electric contols?
- EMS (Energy Management System) or DDC (Direct Digital Control):
- Operator on site?
- Controlled off-site?
- Fans cycled "off" while building is occupied?
- Chiller reset to shed load?
- Preventive maintenance
- Spare parts inventoried?
- Spare air filters?
- Control drawing posted?
- PM (Preventive Maintenance) schedule available?
- PM followed?
- Boilers
- Flues, breeching tight?
- Purge cycle working?
- Door gaskets tight?
- Fuel system tight, no leaks?
- Combustion air: at least 1 square inch free area per 2000 Btu input?
- Cooling Tower
- Sump clean?
- No leaks, no overflow?
- Eliminators working, no carryover?
- No slime or algae?
- Biocide treatment working?
- Dirt separator working?
- Chillers
- No refrigerant leaks?
- Purge cycle normal?
- Waste oil, refrigerant properly disposed of and spare refrigerant properly stored?
- Condensation problems?
This is the blog of Ronald Bartels that wanders on and off the subject of problem management (that is how it started). Mostly now the topics are about IoT and SD-WAN.
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