AAON RZ Series Installation Operation & Maintenance Download

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depending  on  national  and  local  code
requirements  and the application  of the final
user. This  condensate  can stain  the  roof and
it can cause rust in some cases on metal roofs.
It  is  the  responsibility  of  the  end  user  or
contractor to determine if the condensate will
damage the roofing  material.

Below  freezing  ambient  air  temperatures
during  the  heating  mode  can  freeze  any
condensation  made in the drain lines. Smaller
amounts  of  condensation  may  not cause any
issues  but  for  larger  amounts  of  condensate
and  low  ambient  air  temperatures  (below
freezing  for  multiple  consecutive  days)  the
internal  and  external  drain  lines  for the  unit
will  need  to  be  heat  traced  to  prevent
freezing.  Heat traced internal  drain  lines  are
required  and  a  factory  provided  standard
feature on the condensate drain  with the high
turndown  modulating  gas option.

A  condensate

neutralizer

vessel

and

connecting tubing can be added to the
equipment if required. For below freezing
ambient

temperature

applications

the

neutralizer, connecting tubing and drain lines
will

require heat tracing

to prevent

condensate freezing. These components are
the responsibility of the installer.

Leak Testing

All  components  of  gas  supply  system,
including  manual  shut  off  valves  and  the
piping  in the interior  of the unit,  shall  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,
people  or any  other  living  animals  that may
be  sensitive  to  the  residual  odors  or  gases,
shall  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.

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.

LEAK CHECK GAS PIPE

The  gas  pipe  in  the  unit  must  be
checked for leaks before startup. Leak
checking  is  the  responsibility  of  the
installing  contractor.  All  connections
must  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
must  NOT  be  present

in the

conditioned space during the startup
of a gas fired installation.

WARNING