AAON F-060 - Manual (Page 15)

15
Figure 1 - Typical Vertical and Horizontal Unit Installation Methods
Sealing
It is very important to keep outside air from
infiltrating the unit cabinet. Seal all piping
penetrations with Armaflex, Permagum, or
other suitable sealant. Also seal around drain
connections, electrical connections, and
other inlets where air may enter the cabinet.
This is especially important when the unit is
installed in an unconditioned area.
Cooling Equipment
Acceptable system design and installation
will include consideration as follows:
Piping from the condensing unit to the
indoor air handling unit is the responsibility
of the installing contractor.
Only clean “ACR” tubing should be used.
Piping should conform to generally accepted
practices and codes.
Care must be taken not to cross the circuits
on reheat systems.
Once piped, the interconnecting piping and
air handling unit MUST BE evacuated to
500 microns or less; leak checked and
condenser shutoff valves opened to allow
refrigerant flow to air handling unit. Charge
unit with R-410A refrigerant to the
recommended superheat/sub-cooling in the
Charging Refrigerant section of this manual.
Make sure air handling unit thermal
expansion valve bulb is mounted with
good thermal contact on the suction line
on a horizontal section, close to the
evaporator but outside the cabinet in the
4 or 8 o’clock position and well insulated.
Lines should be fastened and supported
according to local codes.