Operating and maintaining rooftop air conditioners
Journal Article
·
· ASHRAE Journal
OSTI ID:603844
- Houghton (David), Boulder, CO (United States)
Rooftop air conditioners must endure radiative heat, high ambient temperatures, leaves, dust, insects, pollen, rain, hail, snow, and even lightning. In many cases no one on-site is responsible for operating them, so the units are ignored until they break down. Field measurements of rooftop unit efficiency show performance substantially below catalog ratings. The operation and maintenance opportunities for rooftop units can be categorized according to their two internal fluid loops: air and refrigerant. Air-side maintenance and repairs should be done before tackling the refrigeration system, because most refrigeration problems can`t be effectively fixed until the proper airflow is established. For example, refrigerant charge measurements will be inaccurate if airflow is restricted by dirty filters. The paper discusses maintenance of filters, the evaporator coil, the supply fan, fan belt, fan motor, outside air dampers, cabinet integrity, refrigerant charge, expansion valve, compressor, condenser coil, and condenser fan and motor.
- OSTI ID:
- 603844
- Journal Information:
- ASHRAE Journal, Journal Name: ASHRAE Journal Journal Issue: 12 Vol. 39; ISSN ASHRAA; ISSN 0001-2491
- Country of Publication:
- United States
- Language:
- English
Similar Records
Hydronic rooftop cooling systems
Packaged air conditioner
Wireless Condition Monitoring and Maintenance for Rooftop Packaged Heating, Ventilation, and Air-Conditioning
Patent
·
Mon Jan 28 23:00:00 EST 2008
·
OSTI ID:983773
Packaged air conditioner
Patent
·
Mon Mar 28 23:00:00 EST 1988
·
OSTI ID:5112361
Wireless Condition Monitoring and Maintenance for Rooftop Packaged Heating, Ventilation, and Air-Conditioning
Conference
·
Tue Jun 01 00:00:00 EDT 2004
·
OSTI ID:15016320