AAON RQ SERIES, Installation Operation & Maintenance, Page: 51 / 100

51
Heating Coils
One or two row hot water and steam heating
and preheating coils can be factory installed.
All valve controls for heating operation are
field supplied and field installed. Hot water
and steam coil connections are spun copper
tube.
Water coils should not be subjected to
entering air temperatures below 38°F to
prevent coil freeze-up. If air temperature
across the coil is going to be below this
value, use a glycol solution to match the
coldest air expected.
Table 12 - Hot Water Coil Connection Sizes
Model (RQ-)
Hot Water Coil
Connection Size
002-006
7/8”
Table 13 - Steam Coil Connection Sizes
Model (RQ-)
Steam Coil Connection
Size
002-006
2 1/8” (standard coil)/
1 1/8” (preheat coil)
Chilled Water Coil
Four or six row chilled water cooling coils
can be factory installed. All valve controls
for cooling operation are field supplied and
field
installed. Chilled water coil
connections are spun copper tube.
Table 14 - Chilled Water Coil Connection
Sizes
Model (RQ-)
Chilled Water Coil
Connection Size
002-006
7/8”
Piping shall be in accordance with
national and local codes. Pressure
limiting devices, backflow preventers
and all other safety requirements are
the sole responsibility of the installing
contractor.
WARNING
Installing Contractor is responsible
for proper sealing of the water piping
entries into the unit Failure to seal the
entries may result in damage to the
unit and property.
CAUTION