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AXIA 20E
COSMOGAS AXIA 20E User Manual
60 pages
Manual
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Instruction manual for installation,
use and maintenance
62403278 - R04 aug. 30-2002
MODELS:
AXIA 20E & AXIA 29E
2
Table of Contents
Default Chapter
2
Safety Instructions
2
Table of Contents
4
1 General Information
6
Key to the Symbols Used
6
Warranty
6
2 GENERAL LAYOUT of the Main Components
7
3 Installation
8
Pre-Installation
8
Instructions for the User
8
Clearances for Installation
8
Clearances from Combustible Material
8
Choosing the Place of Installation
8
Preparing to Install the Water Heater
9
Installation Template
9
Supply and Return Piping
10
Radiant Heating Installation
10
Installation of Two Heaters
10
Installation of Three or more Heaters
10
Multi-Zone System with Several Pumps
10
Multi-Zone System
10
Internal Electrical Connection Settings
10
Use of Glycol
10
Domestic Hot and Cold Water
10
Water Hardness
11
Gas Supply
11
Operating at High Altitudes
11
Connecting the Supply, Return, Gas, Cold Water and Hot Water
12
Safety Relief Valve
12
Electrical Connections
13
Overview
13
Choosing the Room Thermostat
13
Connecting the Room Thermostat
13
Connecting the Power Supply Cable
14
Functional Electrical Diagram
15
Multiwire Electric Diagram
16
Venting Systems
17
Rotation of the Flue Discharge/Air Intake Fittings
18
Kit for Air Intake/Flue Discharge
19
80/80 Split System
20
80/80 Split System: Available Accessories
21
80/80 Split System: Installation Examples
22
60/100 Coaxial System
23
60/100 Coaxial System: Available Accessories
25
60/100 Coaxial System: Installation Examples
26
Combustion Air Supplied from Inside
27
Removing the Condensation Produced by Flue Gas Discharge
28
Water Connections
29
Zone Valves
39
Filling the Heating System
40
Ignition
40
Regulating the Domestic Hot Water
40
Disassembling the Cover Panels
41
Accessing the Internal Components
41
Converting the Burner to Use a Different Type of Gas
42
Checking and Adjusting the Pressure of the Gas Supply
42
Checking and Adjusting the Gas Pressure at the Burner
43
Check CO2 Level
43
Adjusting the Input Rating to the Required Heat Loss
44
Adjust the Input Rating to the Required Maximum Efficiency
44
4 Maintenance
45
General Cautions
45
Cleaning the Burner and the Heat Exchanger (Flue-Gas Side)
45
Burner Flame
46
Safety Relief Valves
46
Flue Gas Discharge
46
Combustible Material
46
Draining the Heating Side of the Heater
46
Draining the Domestic Side of the Heater
46
5 Use
47
Important Information
47
Control Panel
48
Ignition Procedure
48
Summer Operation
48
Winter Operation
48
Adjustments for Winter Operation
49
Gas Valve Service Switch
49
Heating Circulator Pump
49
Low Water Cut-Off Device
49
Manual Reset High-Limit Thermostat
49
Resetting the Ignition Module
49
Room Thermostat
49
Shut-Off Procedure
49
Temperature-Pressure Gauge
49
Abnormalities During Operation
50
Flue Gas Discharge
50
Precautions against Freezing
50
6 Troubleshooting
51
Troubleshooting Sequence of Operation to Light the Burner
51
Troubleshooting Sequence of Operation for a Call for Heat
52
Troubleshooting Sequence of Operation for a Call for D.H.W
52
7 Spare Parts
53
8 Technical Data
54
Table of the Technical Data
54
Curves of Residual Head for Central Heating System
55
Curves Burner Pressure-Input Rating
55
Curves Efficiency-Input Rating
55
Other manuals for COSMOGAS AXIA 20E
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COSMOGAS AXIA 20E Specifications
General
Efficiency
97.6%
Output (kW)
20 kW
Power output
20 kW
Max water temperature
80°C
Type
Condensing
Fuel
Natural Gas / LPG
Water pressure
3 bar
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