Viessmann
Viessmann 7825533 Heat Exchanger
Viessmann 7825533 plate heat exchanger for Viessmann heating and hot water appliances, transferring heat between the primary and domestic hot water circuits.
At a glance
- Part type: Plate heat exchanger
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
£60.00
£50.00 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Viessmann 7825533 is a plate heat exchanger used in Viessmann heating and hot water appliances. It transfers heat from the primary circuit to the domestic hot water circuit across a stack of corrugated plates, keeping the two water paths separate so they never mix. Because the plate pack packs a large surface area into a compact body, it responds quickly to demand and is well suited to instantaneous hot water production.
Signs this part needs replacing
- Domestic hot water temperature swings between hot and cold instead of holding steady.
- Hot water flow rate or outlet temperature drops below the setpoint.
- Water weeps from the plate pack or from the connections.
- Scale or system debris blocks the narrow channels, reducing heat transfer.
- Fault codes appear relating to the hot water circuit or its temperature sensing.
Before you order
- Confirm the part number 7825533 matches the label on the existing heat exchanger.
- Check the appliance model and serial plate before ordering to be sure the correct variant is supplied.
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Mechanical
| Part type | Plate Heat Exchanger |
|---|
Compliance
| Manufacturer part number (MPN) | 7825533 |
|---|---|
| Commodity code | 8419 50 00 00 |
| GPC classification | Household Boilers/Furnaces/Tank Water Heaters Replacement Parts/Accessories |
No fitment data held for this part.
Documents & drawings
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