Indoor Environmental Quality HVAC Assessment of Bollman Bridge Elementary School: January 21st, 2022 (HXBBES2022000066)

Assessor
Hummy Khan
Date
Outdoor Temperature
23°F
Relative Humidity
47%
Outdoor Dew Point
5°F

Air Handling Unit (Assess representative sample of RTU/AHU, including Portables)

Unit
Check OK Comments
Tag Number
Displayed
Yes
Work Order Closed by Building Maintenance
No tag numbers on any exhaust fans (repeat finding). Was not able to find tag numbers on any AAON rooftop units (repeat finding).
Status
Running
Yes
Outdoor Air Intake and Outdoor Air Dampers
Check OK Comments
Outdoor Pollution
Free from pollution sources w/i 25 ft. (e.g. dumpster, chimney, etc.)
Yes
Louvers and Access Doors
Operating properly
Yes
Deflectors & Screens
Present
Yes
No debris
Yes
Dampers
Outside air damper: no obstructions
Yes
Work Order Closed by Building Maintenance
AAON Roof Top Unit (RTU) - 3 and 11 - Outside air dampers closed.
Return air damper: no obstructions
Yes
Mixing Plenum
Check OK Comments
Clean
No excess dirt, not used for storage
Yes
Insulation
Secure and Clean
Yes
P-Trap (if present)
Charged with liquid
Yes
Filters and Coils
Check OK Comments
Filters
Free of any bypassing
Yes
Work Order Closed by Building Maintenance
ICE RTU - Air bypass around filters.
Correct size
Yes
Free from excessive loading, dampness or odor
Yes
Not collapsed/not fallen off
Yes
Present (not missing)
Yes
Date and initials written
Yes
Work Order Closed by Building Maintenance
On some units filters just have dates on them but no initials of the installing technician.
Heating Coils
Clean, no noticeable leaks, or obstructions
Yes
Cooling Coils
Clean, no noticeable leaks, or obstructions
Yes
Access: Free of any obstructions in area that may affect access
Yes
Condensation: No excess condensation problems
Yes
Blowoff: Free of water from coil blowoff
Yes
Condensate Pan and Drain Line
No visible bacterial or fungal growth
Yes
Clean, no residue, no standing water
Yes
No Overflow, leakage, blockage, or damage
Yes
Proper slope, drain line ok, drainage acceptable, discharge okay
Yes
Fans and Motors
Check OK Comments
Condition
Operational
Yes
Work Order Closed by Building Maintenance
One exhaust fan near the roof hatch - Not running.
No unusual odors, noise, or vibration
Yes
Central Plant
Check OK Comments
Chilled Water Central Plant
Chiller operational
Yes
Heating Central Plant
Boiler operational
Yes
Portable(s)
Check OK Comments
Thermostat
Thermostat setting acceptable
Yes
Thermostat cover
Yes
Fan Mode Correct
Yes
Space Temperature Acceptable
Yes
Misc. Comments
Two Daikin ductless split condensing units are sitting on the roof (out of use). One new unopened (appears to be new still in package) Daikin compressor sitting on roof.

Spoke to, HVAC Tech who was at the site and also spoke to Controls Specialist on the phone. Apparently the variable frequency drive for RTU-2 is running at 50% due to a control issue. Also, RTU-3 has some compressor issues and is not heating properly. The HVAC department is working on it.
Work Order Number(s)
220817
Issues found durring this assessment have been assigned to the above work order(s).