46 ACH550 Installation, Operation and Maintenance Manual
ACH550 E-Clipse Bypass
WARNING! Check the motor and motor wiring insulation before connecting the
ACH550 to line power. Follow the procedure on page 12. Before proceeding with the
insulation resistance measurements, check that the ACH550 is disconnected from
incoming line power. Failure to disconnect line power could result in death or serious
injury.
Install the control wiring
Connect control wiring to terminal block X1 on the ACH550 control board and to
terminal block X2 on the E-Clipse Bypass control board. For more information on
these connections, refer to the following:
• X1 terminal block location and terminal data are defined in the ACH550-UH
User’s Manual.
• X2 terminal block location is illustrated in the figures starting with Connection
diagrams – Vertical E-Clipse Bypass on page 40.
• X2 terminal data are provided in Basic control connections for E-Clipse HVAC
Default on page 53.
• Basic connections are described in the following paragraphs. Alternate
configurations using the E-Clipse Bypass macro are described in the ACH550
User’s Manual.
• On Terminal Block X1 inside the ACH550, analog inputs and outputs and
additional digital input and relay output connections (AI1, AI2, AO1, AO2,
DI1…DI6 and RO1…RO6) are available for use.
Note: The E-Clipse Bypass control circuitry uses serial communications connections
(X1:28…X1:32) inside the ACH550. These connections are not available for any
other purpose and must not be reconfigured.
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