AAON RQ SERIES, Руководство пользователя

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26
Installing the USHX
To install the USKX, complete the
following steps:
1. Pump down and recover any residual
refrigerant from the system. This
may have already been done if a
MSEV was installed before this step.
2. Obtain any ¼” access fitting that is
compatible with the system. In this
section, a ¼” access fitting with a
3/16” OD extended tube is used as
an example to demonstrate the
installation process.
3. See Figure 12 and Figure 13 for the
proper orientation of the USHX.
When installing the device on a
horizontal copper line as shown in
Figure 12, the USHX can only be
installed up to a 45° angle from the
vertical axis in either direction
(represented by the curved green
arrows). When installing the device
on a vertical copper line as shown in
Figure 13, the USHX cannot be
installed at a downward angle
(represented by the red arrow).
4. Drill a hole into the copper line that
extended tubes may fit in to. The
location of this hole should be about
6” away from the outlet of the
evaporator.
a. Care must be taken to not
introduce copper shavings
into the copper line while the
hole is being drilled.
5. Remove the valve core of the access
fitting before brazing.
6. Braze the access fitting to the copper
line and allow it to air-cool after
brazing.
7. Place the valve core back onto the
access fitting and tighten the
connection. This step completes the
installation of the ¼” access fitting.
The final result should look similar
to what is shown below in Figure 14.
Figure 12 - USHX installation orientation on a
horizontal copper line
Figure 13 - USHX installation orientation on vertical
copper line
Figure 14 - Brazed access fitting