Saunier Duval UK

- Don�t forget to fit the cold-water inlet flow restrictor to the cold-water inlet (F24e and F30e only).
- Don�t solder the copper tails to your system pipe work while connected to the jig or with the boiler in position.

Electrical Connections

- Don�t put mains voltage onto the low voltage connections.
- Don�t forget to remove the blue link when using voltage free or 230-volt external controls.

Component Structure

- If you are in a hard water area, i.e. more than 200 mg/Litre; it is recommended that a scale reducer be fitted.

Component Change

- Always use clear silicone grease on the �O� rings at reassembly otherwise you may damage the seats.
- The wiring to the thermistors and overheat are not polarity sensitive and can be connected either way round.

Advanced Combination Boiler

Isomax F28e

Installation Requirements

- Don�t forget to fit the cold-water inlet flow restrictor to the cold-water inlet.
- Don�t solder the copper tails to your system pipe work while connected to the jig or with the boiler in position.

Electrical Connections

- Don�t put mains voltage on the room thermostat connection.
- Don�t connect anything other than the optional remote programmer to the remote controls connection. The polarity is important; the boiler will not work if this is reversed.

Component Change

- Don�t over tighten the screws on reassembly.
- Always use clear silicone grease on the �O� rings on reassembly or you will damage the seals.
- The wiring to the thermistors and overheat are not polarity sensitive and can be connected either way round.

High Efficiency Condensing Boilers

Condensing

- Don�t forget to fit the cold-water inlet flow restrictor to the cold water inlet (combi only).
- On extended flues, don�t forget to allow for 2.5� fall back towards the appliance.
- Condensing boilers plume more than ordinary boilers so be aware of this when positioning a boiler, as sometimes your customer or your customer�s neighbours may see this as a nuisance!

Electrical Connections

- Don�t put mains voltage onto the low voltage connections (combi only).
- Don�t forget to remove the blue link when using voltage free or 230-volt external controls (combi only).
- If you are in a hard water area, i.e. more than 200 mg/Litre. It is recommended that the hot water temperature setting be reduced and that a scale reducer be fitted.

Component Change

- Always use clear silicone grease on the �O� rings at reassembly otherwise you may damage the seals.
- The wiring to the thermistors and overheat are not polarity sensitive and can be connected either way round.

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