Viessmann Manifold (Supply, DHW Heat Exchanger) 7828036

This is the Viessmann manifold (supply, DHW heat exchanger), manufacturer part number 7828036. It is the supply-side manifold that connects to the domestic hot water heat exchanger on Vitodens 111-W, 222-F and 242-F storage combi and system appliances. The part routes flow into and out of the DHW heat exchanger circuit.

• Visible leakage, weeping or staining at the manifold body or its connections
• Reduced domestic hot water performance consistent with restricted flow through the heat exchanger circuit
• Scale or debris build-up within the manifold porting
• Loose, damaged or seized connections at the manifold where it meets the DHW heat exchanger
• Evidence of overheating or distortion around the manifold

• Confirm the appliance model and serial number against the fitment list above
• Check the existing part number 7828036 on the component being replaced
• Verify the fault is at the supply manifold rather than elsewhere in the DHW circuit
• Confirm whether the appliance is a 111-W, 222-F or 242-F variant, as fitment differs by model