AAON RL-240 - Manual (Page 35)

35
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 startup 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 startup.
In all cases, including the initial factory
firing and testing, any of the gases will be
under the acceptable level of concentration
for human occupancy.
Installation of the gas heaters should be
adjusted to obtain an air temperature rise
within the range specified on the rating
plate.
Rain Hoods
Gas heating units include factory provided
exterior rain hoods. The hoods are fastened
in place with sheet metal screws. Higher
heating capacity units will have two banks
of gas fired heat exchanges (see Figure 13).
All of the provided hoods must be installed
after the unit is set in place.
Figure 13 - Gas Heater Rain Hood
LEAK CHECK GAS PIPE
The gas pipe in the unit should be
checked for leaks before startup.
Leak checking is the responsibility of
the
installing contractor. All
connections should be checked for
leaks
annually after installation.
Failure to leak check could result in
fire, explosion, or other hazardous
situations.
Some soaps used for leak detection
can be corrosive to certain metals.
Rinse piping thoroughly after leak
test has been completed.
CAUTION
DANGER
Those sensitive to odors or gases
from trace amounts of residual oils
should NOT be present in the
conditioned space during the startup
of a gas fired installation.
WARNING