Indoor Environmental Quality HVAC Assessment of Lake Elkhorn Middle School: January 8th, 2024 (HXLEMS20240000F0)

Assessor
Hummy Khan
Date
Outdoor Temperature
39°F
Relative Humidity
71%
Outdoor Dew Point
30°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 some of the exhaust fans, 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
Inconsistency on the position of the outside air dampers (OADs) from one unit to the other. On some units OADs appear to be 100% open while others are only partially open. For example, ACU-5 and ACU-8, the OADs are 100% open, while on ACU-1, ACU-6 and ACU-7, the OADs are "less" open.
Return air damper: no obstructions
Yes
Work Order Closed by Building Maintenance
HV-2 and ACU-12 - OADs closed.
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
Correct size
Yes
Free from excessive loading, dampness or odor
Yes
Not collapsed/not fallen off
Yes
Work Order Closed by Building Maintenance
ACU-4 - The pre-filter is bent.
Present (not missing)
Yes
Date and initials written
Yes
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
Work Order Closed by Building Maintenance
On all units except ACU-11 - The condensate drains are improperly terminated, repeat finding.
Fans and Motors
Check OK Comments
Condition
Operational
Yes
No unusual odors, noise, or vibration
Yes
Central Plant
Check OK Comments
Chilled Water Central Plant
Chiller operational
Yes
Not operational due heating seasons.
Cooling tower operational
Yes
Not operational due heating seasons.
Heating Central Plant
Boiler operational
Yes
Portable(s)
Check OK Comments
Thermostat
Thermostat setting acceptable
Yes
Work Order Closed by Building Maintenance
Portable # 28, 255, 236, 237 - "Change air filter alarm" on thermostat screen display.
Thermostat cover
Yes
Fan Mode Correct
Yes
Space Temperature Acceptable
Yes
Misc. Comments
ACU-12 condenser section (air conditioning portion) appears to be running while outside temperature is 39 deg. No components of the air conditioning should be running when it's that cold outside. This needs to be checked out during the heating season before the system is switched back to cooling.

Portable # 129 and 130- System was set in "Heat" mode instead of "Auto" mode. On portable 130, was able to change the system to "Auto" while on site but was not able to get into the lock box of portable 129.

Portable # 28- Write portable number on the thermostat like all other portables. Also, thermostat mounted too high for maintenance and inspection. Should not be mounted more than five ft. high (at eye level) like all the other thermostat are mounted.

Identical report has been created for Lake Elkhorn because both the schools are in the same (one) building.
Work Order Number(s)
11169
Issues found durring this assessment have been assigned to the above work order(s).