DEPARTMENT - AIR CONDITIONING|
Roof Top Spring Maintenance
| Before the
cooling season begins; at the very least, a basic Spring Inspection of your equipment
should be performed by a qualified technician. A basic checklist for Roof Top
equipment should include: |
| Let me provide
an example. Cleaning of a Condenser Coil. If not done regularly, a dirty coil
will cause the compressor to run longer and hotter at a higher current draw. If
the compressor gets too hot the valves and bearings will wear faster. A typical
compressor replacement requires a compressor, refrigerant reclaim, new refrigerant
filters, welding, electrical supplies, contactors, material lifting equipment
and several hours of labour. A regular cleaning on a condenser requires a hose,
pressure washer and 1 hour of labour. Bottom line, Dollars. It will cost much
less to clean the condenser even if done every year for 20 years than it will
to replace a compressor once. 'Do' the Preventive Maintenance; it is key to smooth
running equipment. |
The following steps
should be included in a more detailed and thorough initial Spring Inspection:
top safety tips|
Packaged Air conditioning equipment is normally
located on the roof of the building. These are normally accessed by a ladder up
the side of the building or through an internal roof hatch. A properly secured
ladder or a properly operating roof hatch will reduce the element or risk involved.
Unfortunately not all equipment has safe access. Many units do not have fixed
ladders attached to the building or location to place an extension ladder. Internal
roof hatches cannot always be safely accessed or a roof hatch that does not have
a safety spring or hydraulic lift can quickly fall on your head and damage your
spine or neck or worst knock you from the ladder.
Roof top units maybe
located near the roof edge; there should be a minimum of 6 feet clearance around
the equipment. A safety railing should protect areas with less than six feet clearance.
When removing a panels from the equipment beware of the wind, a sudden gust and
easily take off with the panel or knock you over.
There should be an electrical
service disconnect attached to the equipment to turn of the power. If s service
disconnect is not present then the power will have to be shut off at the source
and locked off. Even with the switch off, you must still test for voltage. Older
disconnects have been known to fail, leaving the power on to one leg. You may
even hear the equipment shut off as you turn the power off, it does not mean there
is no voltage present. Remember the old saying about "assume" assumption
with live electricity won't make you an ass, it will make you dead!
indoor and outdoor fans on a roof unit can still move even with the power off.
Condenser fan blades will spin freely form even light winds and the in blower
will spin from internal pressure differences to the outside. Some buildings have
serious negative pressure problems, which can keep the fan spinning. Fans belts
can be very dangerous on large blowers, even when moving slowly. Take care around
any moving parts.
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