Watlow QPAC - Manual (Page 6)

6 QPAC User's Guide Chapter 2: Install & Wire
Chapter 2
How to Install and Wire the QPAC
System Planning
This chapter tells you how to install the QPAC. All mounting and wiring
information is right here. Watlow power controls are thoroughly tested before
leaving the factory, so the QPAC is ready to install when you receive it.
This chapter is divided into three sections that describe the three steps to
installing the QPAC: mounting, power wiring and control card wiring. The first
section lists the mounting information for each of the three types of QPACs,
which, depending on amperage, use one of two case styles. The second
section describes the power and load wiring of the QPACs and semiconduc-
tor fuses, if required. The last section describes the input signal wiring to the
QPAC Control Card.
Before you begin working, read through this chapter to gain an under-
standing of the entire installation. Consider the installation carefully. Plan the
power, load and input signal wiring before mounting the QPAC. Also refer
to any noise guidelines in the temperature control documentation before
proceeding.
Mounting the QPAC
The physical size and mounting dimensions of the QPACs are different for
different current ratings. Find the "Case Style" photo on the next pages that
match your QPAC. The table and figure accompanying each case style will
give you corresponding physical dimensions and mounting footprint. The
table also indicates if the units are equipped with fans and externally-mount-
ed fuses. All QPACs must be mounted vertically, power connections on top,
for proper cooling. Use the wiring data table below for wire sizes and bending
radii.
Mounting
WARNING:
To avoid potential
electric shock and other
hazards, all mounting
and wiring for the QPAC
must conform to the
National Electric Code
(NEC) and other locally
applicable codes.