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2-9 Cascade Installation
• This type of installation allows two units to operate together by connecting two units with
a 2-wire cable and some simple programming.
• The units will operate in a range between 22 MJ/h and 346 MJ/h when two units are
connected together.
• Depending on water flow and desired temperature, the system can automatically
operate or stop either or both units.
• Thermann genuine cascade cable can be used to connected the two units.
• The distance between the two units must be in the range of 50 - 1000 mm.
• Water and gas pipe length should be the same to both units. Otherwise the temperature
of the hot water at the tap can be unstable.
• If connecting optional remote controllers, they must be connected to one unit only.
That unit will need to be set up as the MASTER unit for the system to operate correctly.
• All fittings, valves and branch lines should be matched sets to each of the water heaters.
Remote
Controller
Remote Controller
Connection Terminals
Thermann genuine
cascade cable
Gas Supply
Hot Water Supply Line
Cold Water Supply Line
PCB
(50-1000mm)
the MASTER unit
the SLAVE unit
PCB
Manifold
DN25
Weatherproof
GPO×2
Branches
DN20
•
To connect the cascade cable, refer to “How to fix the cables’’
on page 19.
Recommendation
Manifold line size for cold, hot and gas pipes is DN25.
Branch line size for cold, hot and gas pipes is DN20.
(Refer to AS/NZS 5601 for gas pipe and AS/NZS 3500.4 for water pipe requirements).
(Maximum Four Cables)
REMOTE
CONTROLLER CABLE
CABLE CLAMP (Small)
REMOTE CONTROLLER
CONNECTION TERMINALS
CABLE CLAMP (Large)
CASCADE CABLE
