Control Box Installation
7
Mounting and Plumbing Considerations
The C5 control box is made for above ground portable hot tubs. As such
it is an indoor unit, meant to be mounted inside of the portable hot tub’s
enclosure. Water may fl ow through the heater in either direction, as long
as the water is being pushed through it (plumbed up to the discharge of
the pump). Plumbing the heater up to the suction of the pump will not allow
the heater to operate.
Temperature Sensor Installation
The C5 control box comes with a 1/4” diameter temperature sensor. This
is a dry sensor that is not to be exposed to water. Its probe is meant to be
installed into a thermowell which itself should be installed mid-water level
in the hot tub to provide the most accurate temperature reading. After
installing the temperature sensor probe, be sure to plug the connector on
the end of the cable into the temperature sensor receptacle on the control
box. The included sensor is carefully calibrated to it’s cable’s length, and
therefore must in no way be altered or shortened/lengthened.
Equipment Connection
The Circulation Pump receptacle is for circulation pumps (rated 2A or
less). If your pump does not match this description it must be connected to
the Pump-1 receptacle and used as Pump-1. See page 11 for an important
note on how to wire the Circulation Pump cord for timed operation!
The C5 control uses the red wire for low-speed operation of Pump-1 and
Pump-2. Connecting a single speed pump as Pump-1 for both operating
the jets and heating/fi ltration is not recommended, but if you must use a
single speed pump for both, you must connect the red and black wires of
the pump cable together up to the high speed terminal on the back of the
pump’s motor to both operate jets and heat/fi lter.
If you are connecting an air blower or third pump to the Auxiliary
receptacle, then if there is a two speed Pump-2 it must be wired for single
speed (no red wire) operation at the back of the motor.
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