AAON RM-030 - Manual (Page 10)

10
INSTALLATION continued
CONDENSATE PIPING
AAON units are equipped with drain connections and 'P'
traps are furnished with the equipment. All drain
connections must be used and individually trapped to
ensure a minimum amount of condensate accumulation
in the drain pans.
Drainage of condensate directly onto the roof may be
acceptable in certain areas, refer to applicable codes. If
condensate is to drain directly onto the roof, a small drip
pad should be placed below the drain to protect the roof
from possible damage.
When condensate is piped into the building drainage
system, the drain pipe must penetrate the roof external
to the unit itself. The drain line should be pitched away
from the unit at least 1/8" 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 of the drain pans
reduce 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.
The furnace must be isolated by closing the manual shut
off valve or disconnected from the gas supply piping
during pressure testing of the piping system with pres-
sures in excess of 1/2 PSIG.
The flow of combustion and ventilating air shall not be
blocked or otherwise obstructed in any way.
After electrical power is turned on, set unit controls for
heating, and check for operation.
When checking burner operation, flames should be ob-
served as blue with slight or no yellow tipping. There
should be no sign of flames floating or lifting off or away
from the main burners.
NOTE: In case emergency shut down is required, turn
off the main manual gas shut-off valve and disconnect
main electrical power to unit. These devices should be
properly labeled by the installer.
IMPORTANT NOTICE:
All gas-fired heat exchangers are completely tested at
the factory before shipment. This will remove nearly all
of the oils that have been used in the manufacturing
process, however, trace amounts may remain. When
performing the initial start-up at the jobsite, it is highly
recommended that people or any other living animals,
that may be sensitive to the residual odors or gases, NOT
be present in the conditioned space during the start-up.
In all cases, including the initial factory firing and
testing, all of the gases will be under the minimum
acceptable level of concentration for human occupancy.
DO NOT USE OPEN FLAME OR OTHER SOURCE
OF IGNITION FOR LEAK TESTING.
When pressure testing the gas supply piping, the
furnace must be isolated or disconnected by
closing the individual manual shut-off valve from
the gas supply. Gas valves can be damaged if
subjected to more than 0.5 psig pressure.
! WARNING
Some soaps used for leak detection are
corrosive to certain metals. Carefully
rinse piping thoroughly after leak
test has been completed.
! CAUTION
Those sensitive to odors or gases from
trace amounts of residual oils
should NOT be present in the
conditioned space during the start-up
of a gas-fired installation.
! WARNING
Typical 'P' trap
connection
FOR PROPER UNIT OPERATION,
DRAIN TRAP MUST BE INSTALLED AS SHOWN.
USE ABS TYPE CEMENT TO JOIN THE CONNECTIONS.