AAON RQ SERIES, Installation Operation & Maintenance, Page: 44 / 100

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Leak Testing
All components of gas supply system,
including manual shut off valves and the
piping in the interior of the unit, should be
leak tested with a soap solution before
operating the appliance and at least on an
annual basis thereafter.
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, which 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.
Refrigerant-to-Water Heat Exchanger
Condenser water pump, condenser water
piping, cooling tower or geothermal loop,
pressure gauges, strainers, piping insulation
and all components of the waterside piping
must be field installed.
Water-Source Heat Pump Applications
Water-source heat pump units using 100%
outside air must have electric preheat if the
application has a potential for operation with
air entering the indoor coil below 43°F with
a water loop temperature of 70°F.
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.
DANGER
Do not use open flame or other
source of ignition for leak testing. Fire
or explosion could result causing
property damage, personal injury, or
death.
DANGER
Some soaps used for leak detection
can be corrosive to certain metals.
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 startup
of a gas fired installation.
WARNING
WATER-SOURCE HEAT
PUMP APPLICATIONS
Water-source heat pump units using
100% outside air must have electric
preheat if the application has a
potential for heat pump heating
operation with air entering the indoor
coil below 43°F with an entering
water loop temperature of 70°F.
CAUTION