The Balboa VS513Z Duplex Circuit Board (55840-01) is a retro-fit control board from Balboa Water Group, offering convertible input voltage and dependable spa heating and management.

Specifications:

• Part number: 55840-01 (also referenced as 33-55840-K)
• Model: VS513Z, Duplex
• Convertible input voltage: 120VAC (3-wire) or 240VAC (4-wire)
• Heater output: 1.4kW at 120VAC input or 5.5kW at 240VAC input
• Manufacturer: Balboa Water Group

Fits/replaces:

• Cal Spas and Hydro-Quip 4230B/6230B Series spa systems originally equipped with the Balboa VS513Z circuit board, part 55840-01 or 33-55840-K

Common signs you need this part:

• Spa won't heat or maintain set temperature
• Error codes displayed on the topside panel
• Pumps or other components fail to respond to commands

Returns & installation: This is an electrical component. Per our terms and conditions, electrical parts are non-returnable once installed. Please confirm your existing part number matches before ordering, and have a qualified technician perform installation.

FAQ

What heater output does this board support? 1.4kW at 120VAC input or 5.5kW at 240VAC input.

Which spa brands use this board? Cal Spas and Hydro-Quip 4230B/6230B Series spa systems.