HBX CPU-1000 HVAC Controller
Version 1.38
© HBX Control Systems Inc. 2012
Page 7
INSTALLATION & WIRING
The CPU-1000 is designed to be wall mounted, DIN rail mounted, or installed
inside a separate electrical enclosure. The unit should be mounted inside and be
protected from falling water and high humidity conditions. With all the covers in
place it is designed to protect any individual from accidental electrical shock.
The Controller has a built in 5Amp fast acting fuse to protect the circuitry on the
Printed Circuit Board (PCB). The unit is designed to power up to 3 pumps and 2
auxiliary relays of 10Amps each. As such, an upstream customer supplied fuse or
circuit breaker rated at a maximum of 30 amps must be in circuit. It is the
installers responsibility to provide either a 3 pin (3ft max) grounded plug and cable,
or the unit must be wired directly to a breaker and terminated inside the control
box (terminals 17, 18 & 19).
All power wiring must be with a minimum of 18AWG wire.
Low power wiring ----------- insulated 18AWG (min.) wire to a max of 500ft.
Thermistor wiring ------------ insulated 18AWG (min.) wire to a max of 500ft.
It is recommended to use 18AWG Single Stranded Wire. It is also
recommended to run signal and power wiring in separate conduit.
Only suitably qualified individuals with formal training in electrical and
HVAC controls should attempt the installation of this equipment.
Incorrect wiring and installation will affect the warranty provided with this
unit. Wiring must be completed in accordance with the codes and practices
applicable to the jurisdiction for the actual installation.
Section Two
Installation and Wiring
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