Name: Atag A320S
Brand: Atag
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This renewed publication cancels all previous installation instructions. The company reserves the right to change the specications and dimensions without prior notice.

ATAG Heating UK Ltd. • Unit 3 • Beaver Trade Park • Quarry Lane Chichester West Sussex PO19 8NY

Phone: 01243 815 770 • Fax 01243 839 596 • E-mail: info@atagcommercial.co.uk • Internet: www.atagcommercial.co.uk

E. & O. E.

Default Chapter3
- Table of Contents3
1 Introduction4
2 Rules4
3 Delivery Package6
4 Boiler Description6
5 Mounting the Boiler8
6 Connecting the Boiler9
- Central Heating System9
- Expansion Vessel10
- Water Quality11
- Heating Systems with Plastic Pipes13
- Gas Connection13
- Hot Water Supply (DHW Combi Boilers)14
- Condensation Drain Pipe15
- Flue Gas Exhaust System and Air Supply System17
- Dimensioning of the Flue Gas and Air Intake Duct20
  - Maximum Length21
  - Parameter Setting21
7 External Hot Water Cylinders (solo Boilers)22
8 Electrical Connection22
- Room Thermostat and Controls23
- Detailed Information about the Connections Possibilities24
- Electrical Diagram solo Boiler26
- Electrical Diagram Combi Boiler27
9 Filling and Bleeding of Boiler and CH Installation28
- Hot Water Supply29
10 Boiler Controls29
- Controls and Explanation of the Functions30
11 Commissioning the Boiler31
- Hot Water Supply31
- CH System31
- Pump Function31
- Settings32
- Changing the Settings32
- Activating the Factory Setting (Green Button Function)34
12 Isolating the Boiler35
13 Commissioning35
- Checking the O36
- Maintenance Activities37
- User's Instructions39
- Maintenance Frequency39
- Warranty39
14 Error Message40
Annexe A Technical Specifications41
Annexe B Additives42
Annexe C Dimensions43
Annexe D Declaration of Conformity44
Annexe E Kiwa Certificate45
- Benchmark Checklist46
- Gas Boiler System Commissioning Checklist46
- Service Record47

Atag A320S Installation & Servicing Instructions

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Brand	Atag
Model	A320S
Category	Boiler
Language	English