AAON RQ SERIES, Руководство пользователя

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Mechanical Installation
This section describes the mechanical
installation of the MSEV and USHX Figure
10 below shows an example of a typical
system the MSEV and USHX devices would
be integrated into. Like conventional
thermostatic expansion valves (TXVs) or
electronic expansion valves (EEVs), the
MSEV is installed at the inlet of the
evaporator. The USHC, which drives and
controls the MSEV, is installed at the outlet
of the evaporator, in place of the TXV bulb
or EEV controller sensing device. The
MSEV and USHC are connected together by
a wiring harness. A thermistor at the outlet
of the evaporator measures the temperature,
and the USHC is powered by the Class 2
power source.
.
Figure 10 - MSEV and USHC installation schematic
Do not turn the power source ON until
installation of MSEV, USHX and wiring
harness is complete.
For the user’s own
safety, only Class 2 power source should be
used to power the MSEV and USHX
devices.
WARNING