AAON HB-005 - Manual (Page 23)

23
Condensate Piping
HB package units are equipped with a condensate
drain connection, and ‘P’ traps are furnished with the
equipment. The drain connection must be used and
individually trapped to ensure a minimum amount of
condensate accumulation in the drain pans.
Although drainage of condensate directly onto the roof
may be acceptable in certain areas, is not
recommended as it can damage some types of
roofing, and roofing materials. Refer to local codes for
legalities concerning condensate drainage.
Condensate can be piped to a gutter system, or away
from the building into other drainage. Ideally,
condensate will be piped into the building drainage
system, in which case
the drainpipe may need to
penetrate the roof external to the unit itself.
The drain line should be pitched away from the unit
with at least 1/8” of slope per foot. On longer runs, an
air break should be used to ensure proper drainage.
Drain pans in air conditioning equipment have
moisture present and require periodic cleaning to
remove build up of algae, and/or bacteria. Cleaning
the drain pans reduces the probability of plugged drain
lines and overflow of the pan itself. All cleaning of the
drain pans and inside of the equipment should be
done by qualified personnel.
6. Start-Up
General
ONLY QUALIFIED, AUTHORIZED PERSONNEL
SHOULD POWER ON, OR START-UP THIS
EQUIPMENT.
The use of common sense, and good practice in the
installation, and start-up of equipment will prevent
many potential problems with the system in the future.
Before starting up the equipment, building construction
should be complete, and start-up personnel should:
− Have a working knowledge of general HVAC
and mechanical commissioning procedures
and practices;
− Be familiar with unit functions, features,
optional unit accessories, and all control
sequences;
− Have appropriate literature on hand for
consultation.
Procedures
Before the structure is occupied, the installation,
and/or start-up personnel must take three essential
steps:
1. Pre-Startup Check Out
2. Start-Up
3. Commissioning
Pre-Startup Check Out
All equipment should be thoroughly checked for loose
wiring, free spinning condenser fan and blower wheel,
and well fitting access panels. Unit should not be
operated without proper ductwork, and access panels
installed, except as required during start-up and air
balancing.
Install gauges, voltmeter, and ammeter before start-
up. Observe refrigerant pressures during initial
operation. Note, and determine the cause of any
Equipment operation during construction is not
recommended. Construction site pollution can
affect unit operation, and seriously degrade
performance. Operation during construction will
void all manufacturer’s warranties.
CAUTION