1. Manuals
  2. Brands
  3. COSMOGAS Manuals
  4. Boiler
  5. AXIA 20E
  6. Instruction manual

COSMOGAS AXIA 20E Instruction Manual

Hide thumbs Also See for AXIA 20E:
Table of Contents

Advertisement

Quick Links

MODELS:
AXIA 20E & AXIA 29E

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the AXIA 20E and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for COSMOGAS AXIA 20E

Summary of Contents for COSMOGAS AXIA 20E

  • Page 1 MODELS: AXIA 20E & AXIA 29E...

  • Page 2: Safety Instructions

    SAFETY INSTRUCTIONS WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. — Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
  • Page 3 SAFETY INSTRUCTIONS - These instructions must be read prior to homeowner to save the installation manual near the heater so that service technicians installation. If the information in these instructions is not followed exactly, a fire or may refer to it in the future. explosion may result, causing property damage, personal injury, or death.

  • Page 4: Table Of Contents

    TABLE OF CONTENTS 1 - GENERAL INFORMATION ..............6 1.1 - Key to the symbols used................... 6 1.2 - Warranty ........................6 2 - GENERAL LAYOUT of the main components ........ 7 3 - INSTALLATION ................. 8 3.1 - Pre-Installation ......................8 3.2 - Instructions for the user .....................
  • Page 5 TABLE OF CONTENTS 3.29 - Accessing the internal components ..............41 3.30 - Converting the burner to use a different type of gas ..........42 3.31 - Checking and adjusting the pressure of the gas supply ......... 42 3.32 - Checking and adjusting the gas pressure at the burner ......... 43 3.33 - Check CO2 level ....................

  • Page 6: General Information

    When referring to this to two types of heaters: instruction manual, be sure of which type of heater you are AXIA 20E - this appliance working with. This can be is a wall mounted, direct vent verified by referring to the modulating space/water data plate marked “Space...

  • Page 7: General Layout Of The Main Components

    2 - GENERAL LAYOUT of the main components 1 Connection for air intake in split system 2 Connection for coaxial pipe or for flue discharge in split system 3 Automatic air vent 4 Expansion tank 14 Frame 5 Gas valve 15 Temperature-pressure gauge 6 Safety relief valve 16 Multifunction selector...

  • Page 8: Installation

    3 - INSTALLATION 3.1 - Pre- control of the water pressure or to the lower floor of the building. necessary in the system and the Nothing should be installed Installation necessary measures for filling between the safety relief valves and and for purging;...

  • Page 9: Preparing To Install The Water Heater

    3 - INSTALLATION 3.6 - Preparing to install the water heater l Take the support bracket (see figure 2) and choose a position with proper clearances, as per Figure 4. CAUTION!!! When choosing a mounting surface for the heater. The weight of the heater with water is approximately 150 lbs (68 kg).

  • Page 10: Supply And Return Piping

    3 - INSTALLATION 3.8 - Supply and WARRANTY! heat exchanger for the production of domestic hot water or for a swimming Return Piping 3.10 - Installation pool (see figure 36) The central heating supply and return of two heaters - Indirect water heater; the heater is pipes are marked with different provided with terminals for connecting colored caps, (supply red and return...

  • Page 11: Water Hardness

    3 - INSTALLATION regulated to provide domestic hot 3.17 - Water of the heater. Refer to figure 4, for water between 100°F (38°C) and the gas inlet location of the heater. Hardness 176°F (80°C). Gas piping to the heater must be sufficient to guarantee a supply of gas In hard water areas (above 150 to meet maximum requirements.

  • Page 12: Connecting The Supply, Return, Gas, Cold Water And Hot Water

    3 - INSTALLATION 3.20 - Connecting the supply, return, gas, cold water and hot water In its standard configuration, the heater comes with the fittings illustrated in figure 26. More information about this matter are in the next pages 3.21 - Safety relief valve An ASME approved safety relief valve, set at 30 psi (2 bar), is...

  • Page 13: Electrical Connections

    3 - INSTALLATION l connect the two ends of the 3.22 - Electrical Maintain the correct polarity cable to terminals 7 and 8; between live and neutral when connections l connect the cable, using a connecting the heater. screwdriver to press down on the Ensure that the water and heating terminal block levers as shown in system pipes are not used as...

  • Page 14: Connecting The Power Supply Cable

    3 - INSTALLATION 3.22.4 - Connecting the power supply cable To connect the electrical power cable, proceed as follows (refer to figures 6, 7, and 8): l use a three-core cable with double isolation and a minimum cross section of 18 AWG (1.5 mm2);...

  • Page 15: Functional Electrical Diagram

    3 - INSTALLATION 3.22.5 - Functional electrical diagram...

  • Page 16: Multiwire Electric Diagram

    3 - INSTALLATION 3.22.6 - Multiwire Legend: see chapter 3.22.5 electric diagram...

  • Page 17: Venting Systems

    3 - INSTALLATION 3.23 - Venting systems This heater can be fitted with either a concentric or split type venting system. The approved types of flue gas discharge configurations for this heater are shown in figure Particular attention must be taken when installing the vent pipes that go through the wall to the outside.

  • Page 18: Rotation Of The Flue Discharge/Air Intake Fittings

    3 - INSTALLATION 3.23.1 - Rotation To carry out this operation (refer to figure 10): of the flue l remove the fixing screws “A” from the top cover “B”. discharge/air l rotate the top cover to the desired position. intake fittings l reinsert the fixing screws “A”...

  • Page 19: Kit For Air Intake/Flue Discharge

    3 - INSTALLATION 3.23.2 - Kit for air intake/flue discharge To assist the installer, COSMOGAS has created flue kits, complete with all the necessary components for flue discharge and air intake. The four kits available are as follows: P/N 62617191 P/N 62617191.

  • Page 20: 80/80 Split System

    3 - INSTALLATION 3.23.3 - 80/80 split system The heater is not supplied with fittings for the flue gas discharge/air intake connections. To connect the heater to an 80/80 split system it is necessary to order the special kit and install it as shown in figure 11.

  • Page 21: 80/80 Split System: Available Accessories

    3 - INSTALLATION 3.23.4 - 80/80 split any other building openings (doors, windows, etc.) Do not place vent system: available terminal where flue products can cause corrosion. accessories CAUTION!!! All venting Some of the most commonly used accessories for installing the split MUST be secured with screws, vent 80/80 flue gas discharge/air and MUST be sealed from flue...

  • Page 22: 80/80 Split System: Installation Examples

    3 - INSTALLATION 3.23.5 - 80/80 split system: installation examples Figure 14 - Installation example Figure 15 - Installation example Figure 16 - Installation example...

  • Page 23: 60/100 Coaxial System

    3 - INSTALLATION 3.23.6 - 60/100 coaxial system The heater does not come with fittings for the flue gas discharge / air intake connection. To connect the heater to a coaxial 60/100 system it is necessary to order the special kit for vertical flue gas discharge and install it as shown in figure 17 or the kit for horizontal flue gas discharge and install it as shown in...
  • Page 24 3 - INSTALLATION FIRST insert the vent inner pipe into the vent CAUTION!!! Be careful when elbow and tighten using self-tapping screws “N” installing coaxial venting Proper assembly and installation of venting elbows and tubing must include the use of self-tapping screws to permanently secure in place the internal and external discharge tube (see figure 20 item P and N).

  • Page 25: 60/100 Coaxial System: Available Accessories

    3 - INSTALLATION 3.23.7 - 60/100 coaxial system: available accessories For connecting the 60/100 coaxial discharge system, the following accessories are available on request: (the number after the P/N is used to refer to the part in the following drawings) 62617049 - N°...

  • Page 26: 60/100 Coaxial System: Installation Examples

    3 - INSTALLATION 3.23.8 - 60/100 coaxial system: installation examples Figure 22 - Installation examples of the coaxial pipe Figure 23 - Installation examples of the coaxial pipe...

  • Page 27: Combustion Air Supplied From Inside

    3 - INSTALLATION 3.23.9 - Combustion air supplied from inside If the heater is installed in a large open area such as a full basement or alcove, the combustion air can be supplied without the intake pipe, (See fig.24 and 25). The heater will draw all air for combustion through the top of the unit from the space around the heater.

  • Page 28: Removing The Condensation Produced By Flue Gas Discharge

    3 - INSTALLATION 3.23.10 - Removing the condensation produced by flue gas discharge Due to the high efficiency of this heater, condensation will form in the discharge piping as a result of the cooling of the flue gases. It is therefore necessary to take every precaution to prevent this condensation from going inside the...

  • Page 29: Water Connections

    3 - INSTALLATION 3.24 - Water Connections Each heater contains a kit of accessories to help the installer make the water connections. An example of these connections and all the accessories supplied with the heater is shown on the figure 26a: 3) 1"...
  • Page 30 3 - INSTALLATION 8 Back-flow preventer 2 By-pass valve 9 Sanitary drain cock 3 Heating drain cock 10 Mixing valve 4 Radiators 11 Flow restrictor 5 Gas cock 12 Hot water outlet 6 Automatic feed 13 Cold water inlet 7 Safety Pressure relief 14 Gas supply valve (150 psi) Figure 27 - Hydraulic diagram of installation with radiators...
  • Page 31 3 - INSTALLATION Figure 28 - Two heaters installation with domestic hot water recirculating system...
  • Page 32 3 - INSTALLATION Figure 29 - Three or more heaters installation with connection for indirect water heater...
  • Page 33 3 - INSTALLATION 1 Cosmogas combi 11 Automatic feed 12 Back flow preventer 3 Heating Drain cock 13 Pressure gauge 4 Plate heat exchanger 14 Additional expantion tank 5 Three ways valve 15 Relief valve, 30 psi 6 Floor protection thermostat 16 Pressure relief valve, 150 psi set to 104°F (40°C) 17 Sanitary drain cock...
  • Page 34 3 - INSTALLATION 1 Cosmogas combi 12 Added system pump 13 Optional ball valve 3 Heating drain cock 14 Tees with drains to bleed zones 4 Pressure disconnector 15 Return piping from zones 5 Flow checks 16 Pressure relief valve 150 psi 6 Optional ball valve to isolate heater 17 Sanitary drain cock 7 Supply piping to zones...
  • Page 35 3 - INSTALLATION 11 Zone valves 1 Cosmogas combi 12 Optional ball valve 13 Tees with drains to bleed zones 3 Heating drain cock 14 Return piping from zones 4 By-pass valve 15 Pressure relief valve, 150 psi 5 Optional ball valve to isolate heater 16 Sanitary drain cock 6 Supply piping to zones 17 Mixing valve...
  • Page 36 3 - INSTALLATION Connections inside junction 11 Back-flow preventer 12 Circulating pumps 13 Ball valve to isolate zones 14 Tees with drains to bleed zones GROUND 15 Return piping from zones 1 Cosmogas combi 17 I.W.H Aquastat or plate heat 2 Indirect water heater exchanger aquastat 3 Heating drain ccock...
  • Page 37 3 - INSTALLATION Figure 34 - Indirect Water Heater and more pumps installation...
  • Page 38 3 - INSTALLATION Figure 35 - More pumps installation Figure 36 - Plate heat exchanger installation...

  • Page 39: Zone Valves

    3 - INSTALLATION External transformer 115V COSMOGAS combi Heating Heating thermostat thermostat zone 1 zone 2 Thermostat Normally open Heating Heating isolation relay zone zone valve 2 valve 1 Figure 38 - Wiring diagram for taco Figure 37 - Deleted zone valves Zone valve 1 Motor...

  • Page 40: Filling The Heating System

    3 - INSTALLATION 3.25 - Filling the 45) is illuminated but the pump is not running, this might indicate that heating system the pump is frozen in place, remove the screw cap on the pump and rotate with a screwdriver to try Fill the heating system using only releasing it.

  • Page 41: Disassembling The Cover Panels

    3 - INSTALLATION 3.28 - Disassembling the cover panels To disassemble the cover panels, proceed as follows (refer to figure 41): l unscrew the two “A” screws from the bottom of the front panel; l pull the bottom of the front panel “B”...

  • Page 42: Converting The Burner To Use A Different Type Of Gas

    3 - INSTALLATION 3.30 - Converting the burner to use a different type of The conversion of the burner to use a different type of gas must be carried out by a qualified technician. CAUTION!!! If the available gas supply does not match the type of gas with which the heater can function, it is necessary to convert the appliance.

  • Page 43: Checking And Adjusting The Gas Pressure At The Burner

    3 - INSTALLATION 3.32 - Checking 3.33 - Check CO2 and adjusting the level gas pressure at During normal operation at altitudes below 2000 ft (659 m), the CO2 the burner (carbon dioxide) content of the heater flue gases is given in table The gas pressure of the burner must 8.1 at the end of the manual.

  • Page 44: Adjusting The Input Rating To The Required Heat Loss

    3 - INSTALLATION 3.34 - Adjusting 3.35 - Adjust the the input rating input rating to to the required the required heat loss maximum The input rating of the heater can efficiency be varied anywhere between the The input rating of the heater can minimum and maximum setting of be varied anywhere between the the heater to meet the required...

  • Page 45: Maintenance

    4 - MAINTENANCE 4.1 - General cautions CAUTION !!! Maintenance must be performed by a qualified installer, service agency or the gas supplier. Maintenance should be carried out at least once a year, before the start of the winter season 4.2 - Cleaning the burner and the heat exchanger (flue-gas side)

  • Page 46: Burner Flame

    4 - MAINTENANCE 4.3 - Burner flame (40°C); l close the main cold water supply Periodically check the appearance valve; of the burner flame. It should be l remove the cover panels (see uniformly distributed over the entire chapter 3.28); surface of the burner, it should be l connect a rubber hose to the light blue in color, and the surface...

  • Page 47: Use

    5 - USE IMPORTANT INFORMATION FOR THE USER - What to do when the power switch. Refer to the smell of gas is present instructions in chapter 5.14 if - The user must call in a l Turn the gas cock off and there is risk of freezing.

  • Page 48: Control Panel

    5 - USE 1 - Gas valve service switch 2 - High limit thermostat reset button 3 - Heater temperature control knob 4 - multifunction selector: A - OFF position B - Summer position, only DHW (green light ON) C - Winter position. DHW and space heating only when “C” orange light is ON D - Winter position, for safe money.

  • Page 49: Adjustments For Winter Operation

    5 - USE at minimum imput rate, in order to skinny object to manually reset conserve energy. (the high limit thermostat will not 5.7 - Resetting To use the heater more efficiently, it reset unless the button is the Ignition is recommended to set selector “4”...

  • Page 50: Precautions Against Freezing

    5 - USE installed, make sure it is room where it is installed, and programmed to start the heater that it is programmed to call for when the room temperature drops heating (setback thermostats) l any valves installed on the below 47°F (8°C) If the heater will not be used for a heating supply and return...

  • Page 51: Troubleshooting

    6 - TROUBLESHOOTING 6.1 - Troubleshooting All references to controls in this Sequence of schema, unless specified otherwise, are referred to figure 48. operation to light the burner...

  • Page 52: Troubleshooting Sequence Of Operation For A Call For Heat

    6 - TROUBLESHOOTING 6.2 - Troubleshooting All references to controls in this schema, unless specified otherwise, Sequence are referred to figure 48. Operation for a Call for Heat 6.3 - Troubleshooting All references to controls in this schema, unless specified otherwise, Sequence are referred to figure 48.

  • Page 53: Spare Parts

    7 - SPARE PARTS Ref. to Descriptions P/N for AXIA 20E P/N for AXIA 29E Figure 1 Automatic air vent 61206002 61206002 Expansion tank 62202001 62202001 Gas valve 61201032 61201032 Safety relief valve 61205010 61205010 Circulator pump 62301025 62301025 Heat exchanger...

  • Page 54: Technical Data

    8 - TECHNICAL DATA 8.1 - Table of the technical data Heater model AXIA 20E AXIA 29E CSA certification number 1286455 (LR 114696) 1286455 (LR 114696) Heating and domestic nominal input rating Btu/hr (kW) 90,000 (26.4) 160,000 (46.9) Heating and domestic nominal output rating Btu/hr (kW) 76,500 (22.4)

  • Page 55: Curves Of Residual Head For Central Heating System

    3 = third speed Flow rate (gal/min.) Flow rate (lit/min) 8.3 - Curves burner pressure- input rating Where: A = AXIA 20E B = AXIA 29E Burner pressure (“WC) Burner pressure (mbar) 8.4 - Curves Efficiency- input rating Where: A = AXIA 20E...
  • Page 56 R1007 FOR TECHNICAL SUPPORT CALL: Embassy Industries, Inc. 300 Smith Street Farmingdale, NY 11735 PH - 631-694-1800 Fax - 631-694-1832 www.embassyind.com sales@embassyind.com MANUFACTURED BY: COSMOGAS s.r.l. Via L. da Vinci 16 - 47014 MELDOLA (FC) ITALY info@cosmogas.com www.cosmogas.com ISO 9001 Certified Quality System...
  • Page 57 Updating instructions for Axia heaters with Honeywell Ignition module S89E Dear customer: Your heater is now built with an ignition module made by Honeywell. For this reason we have change the electrical schematic and the instructions for its use to reflect this change. (See page 4). manufactured by: COSMOGAS SRL Via L.
  • Page 58 INSTALLATION Functional electrical diagram...
  • Page 59 INSTALLATION Multiwire electric diagram...
  • Page 60 1 - Gas valve service switch 2 - High limit thermostat reset button 3 - Heater temperature control knob 4 - multifunction selector: A - OFF position B - Summer position, Will provide only DHW (green light ON) C - Winter position. Will provide DHW and space heating only when “C” orange light is ON D - Winter position, Money saver.

This manual is also suitable for:

Axia 29e

Table of Contents