Dimension One heater - C3552-1

This 5.5 kW heater is manufactured by HydroQuip, and is a good replacement for the C3550, which is no longer manufactured. It has two elements of 2100W and 3400W, so it can heat at 5500W if both are powered.

The C3552-1 is installed on many Dimension One Bay series spas, often installed around a Gecko M-Class control system.

Some older versions of this heater have a built-in pressure switch, and a little control cable that connects to the motherboard of the hot tub control system, to tell the system that there is water flowing through the heater. If you are replacing a heater of this type, you should plug in a jumper, in place of the pressure switch cable, on the motherboard.

We also recommend that you install a flow switch at the exit of this heater, even if the old heater that you are replacing uses a pressure switch to detect the water flow.

You can, however, install a pressure switch if you really insist. You just need to remove a little plug on the heater beforehand, using allen key. Don't forget to use Teflon tape when installing the pressure switch!

The heater comes with short cables, but it is quite easy to extend them.

Dimensions
Long length: 530 mm
Short length: 420 mm
Width: 400 mm
Distance between long and short sides : 310 mm

Wiring
The table below shows the different ways of wiring the heater in order to have different powers. For options B and C, you must terminate and insulate the unused wire (brown for option B, blue for option C).

Warranty
2-year Tubs Parts warranty

Part numbers
HydroQuip: 26-C3552-1-7T-K
ThermProducts : C3552-1
Replaces: C3550-1, C3552-1, SHH-5500-NH6871, SHH-5500-NH6785, SHH-5500-NH7328, SHH-5500-NH6771