Airmax MaxAir 100e P2, Design, Installation And Maintenance Instructions

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Page 19
evaporator coil assembly
1) Liquid line
2) Site glass (not Supplied)
3) High side access port
4) Adjustment stem cap (not applicable)
5) Superheat adjustment stem (not
applicable)
6) Thermal expansion valve(TXV)
7) Refrigerant distributor
8) Distributor tubes
9) External equalizer line
10) Suction line
11) Anti-ice control (Frost thermostat)
12) Low side access port
13) TX capillary tube
14) TX sensing bulb
refrigeration piping
Use only refrigerant grade pipe and fittings.
Plumbing fittings may contain wax or other
contaminants which are detrimental to the
proper operation of the system. Insulate the
suction line as per condenser manufacturer’s
instructions
Install the refrigeration lines as per local
codes and good piping practices, supporting
the pipe every 5 feet. Run the pipes in the
most direct route possible, taking into
account structural integrity and building
finishing details. If the evaporator is located
above the condenser, slope any horizontal
runs toward the condenser and provide a trap
at the evaporator to prevent liquid migration
during the off cycle. If the condenser is
located above the evaporator, a trap must be
installed in the suction line at the bottom of
the vertical riser. For long vertical risers,
additional traps must be installed for every
twenty feet. For lines running over 50', a
suction line accumulator must be installed.
Lines running over 100' are not
recommended.
Flow nitrogen at a low pressure through the
piping when welding to prevent oxidation.
condensing unit wiring
Make all connections to the outdoor unit with
liquid tight conduit and fittings. Most building
codes require a rain tight disconnect switch at
the outdoor unit as well. Run the proper size
wire to the unit, and connect as per the
manufacturer’s recommendations. Ensure
that the unit is setup for a TX valve system. If
not, a hard start kit may be required.
evacuating and charging
After the piping is installed, and all
components connected, pressurize the
system and check for leaks. The use of an
electronic leak detector is recommended, as
it is more sensitive to small leaks under the
low pressures commonly used for initial leak
detection.
Fill the system with nitrogen to 100 psig and
test for leaks. Using a good, quality vacuum