Nortek B64BM Series, Руководство по установке

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1. Remove the cap from the end of the liquid line.
2. Verify pressurization by depressing the Schrader valve
on the end of the liquid line. Listen for any escaping gas.
If there is no pressure, test the coil for leakage.
• If leakage is found, clearly mark the location of the leak
and return the coil to the distributor for processing.
• If no leaks are found, the coil may be installed.
3. Depress the valve to relieve all pressure from the coil.
4. Remove and discard the valve core.
CAUTION:
To prevent damage to the unit or internal
components, it is recommended that two
wrenches be used when loosening or tightening
nuts. Do not over tighten!
5. Using two wrenches, loosen the nut and distributor body
as shown in Figure 6 . Turn the assembly nut counter-clock-
wise until the orifice body halves are seperated.
6. Insert a light-gauge wire hook between the distributor body
and the restrictor orifice while being careful not to scratch
either part. Carefully remove the restrictor orifice from the
distributor body. See Figure 7 .
7. Check the actual size of the new orifice. NOTE: The size
is stamped on its side. Do not use pin gauges to measure
the orifice diameter.
8. Insert the new orifice into the distributor body, rounded
end down. See Figure 8 .
CAUTION:
To prevent damage to the unit or internal
components, it is recommended that two
wrenches be used when loosening or tightening
nuts. Do not over tighten!
9. Realign the assembly nut on the distributor body and hand
tighten both components. Mark a line on both bodies and
then tighten an additional 1/4 turn using two wrenches. The
movement of the two lines will show how much the nut is
tightened. If a torque wrench is used, tighten to 10-12 ft.
lbs. or 14-16 Nm.
Connecting the Linesets
The steps in the Orifice Removal & Installation section
must be performed before the linesets are connected.
IMPORTANT NOTES FOR HORIZONTAL OR
DOWNFLOW INSTALLATIONS WITH TXV VALVE:
• The sensing bulb must be located flush against the
suction line for optimum heat transfer.
• Avoid attaching the sensing bulb to the lowest part of
the suction line where condensate may accumulate.
• Do not locate the sensing bulb on vertical sections of
the lineset.
• For horizontal lines, the bulb should not be located at
12 or 6 o’clock position of the suction line. The best
location is at 4 or 8 o’clock.
• For additional information on proper sensing bulb
locations, please refer to the valve manufacturer’s
instructions.
Figure 6. Loosening of Nut & Distributor Body
Figure 7. Restrictor Removal from Distributor Body
Figure 8. Installation Of New Orifice
1. Remove grommets from line set holes.
CAUTION:
It is recommended that a wet rag be wrapped
around the suction line in front of the close off
plate or the sensing bulb (if TXV is installed)
before applying heat. Failure to keep components
cool during brazing may result in structural
damage, premature equipment failure, or possible
personal injury.
2. Cut off the heat shrink and remove the plug from the suction
line.
3. Route and cut both lineset tubes to proper length in
accordance with the outdoor unit specifications. Verify the
ends are round, clean, and free of any burrs.
4. Position grommet on line set with sufficient distance away
from brazing area. Brazing processes can permanently
damage grommets.