COSMOGAS AXIA 20E Installation And Operating Manual Download Page 39

Page: 39 / 56

Figure 38 - Wiring diagram for taco

zone valves

Figure 37 - Taco zone valves

Thermostat

zone 1

Thermostat

zone 2

115V

24V

External

transformer

2
3

Taco zone valves

COSMOGAS

Combi

Thermostat

Heating

thermostat

zone 1

Figure 39 - Honeywell controls and

circulators

T87F

thermostat

T87F

thermostat

T87F

thermostat

115V

T T

1 2

T T

1 2

6 5

4 3

6 5

4 3

6 5

4 3

R-845

T T

1 2

External

pump

External

pump

External

Wiring schematic using

circulators and R-845

relays for multi zone

system

115V

Thermostat

COSMOGAS

combi

Heating

thermostat

zone 2

External

transformer

115V

24V

COSMOGAS

combi

Thermostat

Heating

zone

valve 1

Heating

zone

valve 2

3 - INSTALLATION

Figure 40 - Wiring diagram for zone

valves

End

switch

Motor

Zone valve 1

Room

thermostat

zone 1

End

switch

Motor

Zone valve 2

Room

thermostat

zone 2

End

switch

Motor

Zone valve 3

Room

thermostat

zone 3

Thermostat

24V

115Vac

24Vac

COSMOGAS

combi

115Vac

Summary of Contents for AXIA 20E

Page 1: ...Instruction manual for installation use and maintenance 62403278 R03 aug 01 2002 MODELS AXIA 20E AXIA 29E...

Page 2: ...the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Immediately call you...

Page 3: ...er At least once a year the user must call in a licensed authorized technician for routine maintenance before using it for central heating Servicing Manual when the installation and commissioning of t...

Page 4: ...cting the supply return gas cold water and hot water 12 3 21 Safety relief valve 12 3 22 Electrical connections 13 3 22 1 Overview 13 3 22 2 Choosing the room thermostat 13 3 22 3 Connecting the room...

Page 5: ...rol panel 48 5 2 Ignition procedure 48 5 3 Summer operation 48 5 4 Winter operation 48 5 5 Adjustments for winter operation 49 5 6 Room thermostat 49 5 7 Resetting the Ignition Module 49 5 8 Low water...

Page 6: ...e serious injury to persons or animals or damage to property CAUTION Generic danger Failure to observe these precautions may compromise the correct operation of the unit or cause serious injury to per...

Page 7: ...Speed control board 11 Domestic hot water priority thermostat 12 Domestic hot water pipe 13 Domestic cold water pipe 2 GENERAL LAYOUT of the main components Figure 1 General layout of the main compon...

Page 8: ...and for purging inform the user on how to correctly set the temperatures and room thermostats to conserve energy 3 3 Clearances for installation Figure 4 shows the proper distances that are allowed fo...

Page 9: ...e the bracket to the wall NOTE Screws MUST be screwed directly into the 16 406 mm vertical studs Place the template onto the support bracket and make necessary hole or holes for the discharge flue ven...

Page 10: ...he pressure of the heating system circuit For this purpose install a hydraulic disconnector between the heater and the system see fig 31 3 13 Multi zone System When creating a multi zone system it is...

Page 11: ...e is located on the front panel of the heater There are two possible situations A the gas and the supply pressure match the configuration of the heater In this case it is possible to proceed with conn...

Page 12: ...supply system CAUTION Do not plug the safety relief valve There must be no valves between the relief valve and the heater The relief valve discharge pipe must not be restricted or plugged Connect the...

Page 13: ...Provide the installation of a main emergency switch immediately upstream from the heater 3 INSTALLATION Maintain the correct polarity between live and neutral when connecting the heater Ensure that th...

Page 14: ...box A open the door A as shown in figure 7 unscrew screws C D on cable clamp and pass the cable inside To connect the cables use a screwdriver to push down on the levers of the terminal block as shown...

Page 15: ...alve service switch P01 circulator pump PR Low water cut off PSJ Connection for plate heat exchanger or indirect water heater PWM Blower speed control RC Reset for ignition module RTC Room thermostat...

Page 16: ...16 3 INSTALLATION 3 22 6 Multiwire electric diagram Legend see chapter 3 22 5...

Page 17: ...er or similar product to capture waste heat from exhaust Follow local gas codes in your region or refer to National Fuel Gas Code or Can B149 1 INSTALLATION CODES Maintain at least 4ft 1 2 m clearance...

Page 18: ...ation refer to figure 10 remove the fixing screws A from the top cover B rotate the top cover to the desired position reinsert the fixing screws A and lock them down without excessive force Note C ind...

Page 19: ...or other accessories refer to figures 14 15 and 16 P N 62617186 Coaxial Vent Elbow Kit This kit is used if you are taking in and discharging air from to the outside of the building with a concentric...

Page 20: ...0 3 m This will prevent any water rain go into the heater The heater is equipped with a condensation collector which if used must be connected to a discharge pipe see fig 12 details G H L M Details G...

Page 21: ...el 61302011 N 29 Stainless steel roof terminal 61302004 N 30 Horizontal discharge terminal 62617098 N 38 Tfittinginstainless steel 62617157 N 35 condensation trap 60702011 N 48 silicone washer P N 607...

Page 22: ...22 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: ...igure 17 if you have a vertical flue gas discharge or refer to figure 18 if you have a horizontal flue gas discharge close the ventilation opening 7 with the seal 6 the flange 5 and the bolts 4 insert...

Page 24: ...pletely out of the outer pipe If the intake grid see figure 20 item S is hidden the heater will not receive enough air for combustion and would fail to ignite Take particular care with the installatio...

Page 25: ...nnecting 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 14 3ft 1000 m...

Page 26: ...26 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: ...ess than 100 square inches 645 cm2 These openings must freely connect with areas having adequate infiltration to the outside When all air provided is supplied from the outdoors the openings as describ...

Page 28: ...es 14 15 16 and 23 or similar In particular the system for emptying condensation must be connected to the domestic sewage system through an air trap to prevent the pressurisation of the system or the...

Page 29: ...sure relief valve 150 psi not provided 7 Heating return connection 8 Heating supply connection 9 ASME pressure relief valve 30 psi 10 Connections not provided 11 Domestic drain cock not provided 12 He...

Page 30: ...6 Automatic feed 7 Safety Pressure relief valve 150 psi 3 INSTALLATION 8 Back flow preventer 9 Sanitary drain cock 10 Mixing valve 11 Flow restrictor 12 Hot water outlet 13 Cold water inlet 14 Gas su...

Page 31: ...anitary drain cock 4 Gas cock 5 6 By pass valve 7 Pressure relief valve 150 psi 8 Radiator 9 Automatic feed 10 Back flow preventer 11 Gas inlet 12 Mixing valve 13 Cold water inlet 14 Recirculating pum...

Page 32: ...4 Ball valves 5 Gas cocks 6 Back flow preventer 7 Supplementary expansione tank 8 Manometer 9 Gas supply 10 Cold water inlet 11 Supply and return for central heating 12 Supply and return for eventual...

Page 33: ...n thermostat set to 104 F 40 C 7 Supplementary pump 8 Air vent 9 Radiant heating 10 Gas cock 11 Automatic feed 12 Back flow preventer 13 Pressure gauge 14 Additional expantion tank 15 Relief valve 30...

Page 34: ...ater 7 Supply piping to zones 8 Gas cock 9 Automatic feed 10 Optional ball valve 11 Back flow preventer 3 INSTALLATION 12 Added system pump 13 Optional ball valve 14 Tees with drains to bleed zones 15...

Page 35: ...Ball valve 10 Back flow preventer Figure 32 Zoning with zone valves Multizone hydronic piping 3 INSTALLATION 11 Zonevalves 12 Optional ball valve 13 Tees with drains to bleed zones 14 Return piping f...

Page 36: ...valve to isolate zones 14 Tees with drains to bleed zones 15 Return piping from zones 16 17 I W H Aquastat or plate heat exchanger aquastat 18 Electrical three ways valve 19 Plate heat exchanger 20 H...

Page 37: ...37 3 INSTALLATION Figure 34 Indirect Water Heater and more pumps installation...

Page 38: ...38 3 INSTALLATION Figure 36 Plate heat exchanger installation Figure 35 More pumps installation...

Page 39: ...845 R 845 T T 1 2 External pump External pump External Wiring schematic using circulators and R 845 relays for multi zone system 115VAC Thermostat COSMOGAS combi L N Heating thermostat zone 2 External...

Page 40: ...en the room thermostat calls for heating If the pump indicator C see fig 3 INSTALLATION 45 is illuminated but the pump is not running this might indicate that the pump is frozen in place remove the sc...

Page 41: ...s E by swinging out front portion approximately 2 in 5 cm unscrew the C screws from the bottom panel and pull down panel section D 3 29 Accessing the internal components To access the internal compone...

Page 42: ...y must match the values given in the table in chapter 8 at the end of the manual To check the pressure proceed as follows close the gas cock remove the heater cover panels unscrew the pressure probe I...

Page 43: ...s minimum burner pressure If the above values do not match those given in table 8 1 it is necessary to operate as follows to adjust the pressure use regulator A see figure 45 to adjust the maximum pre...

Page 44: ...gure 48 Heating energy saving position After the heater reaches a temperature above 140 F 60 C light C see figure 48 should be lit In this state you can adjust the imput rating in the follow manner ve...

Page 45: ...ircuit remove turbulators 6 pass a cylindrical brush with plastic bristles inside the flue gas pipes the pipes in which turbulators 6 were installed and brush turbulators 6 using a vacuum cleaner remo...

Page 46: ...heater To drain the heating side of the heater proceed as follows turn off the heater turn on the domestic hot water to cool the heater until the temperature indicated by the thermometer is less than...

Page 47: ...cian will explain to the user how the heater works and how to operate it The user must know how to fill see chapter 3 25 and drain see chapter 4 7 and 4 8 the circuit he must also know how to control...

Page 48: ...ation and the lock out indicator E illuminates it means that the electrical line neutral polarity has been inverted CAUTION If the lock out condition reoccurs frequently call a qualified technician to...

Page 49: ...ed personnel 5 8 Low water cut off device This device is triggered when the water pressure inside the heating circuit indicated by pressure gauge 6 drops below 8 PSI 0 5 bar When this occurs indicator...

Page 50: ...the winter white smoke will come out of the discharge pipe This is not a cause for worry as it is only steam which condenses in contact with the cold air 5 16 Abnormalities during operation If the hea...

Page 51: ...51 6 1 Troubleshooting Sequenceof operationtolightthe burner 6 TROUBLESHOOTING All references to controls in this schema unless specified otherwise are referred to figure 48...

Page 52: ...ROUBLESHOOTING All references to controls in this schema unless specified otherwise are referred to figure 48 6 3 Troubleshooting Sequence of Operation for a Call forD H W All references to controls i...

Page 53: ...53 Spare parts are available from your local authorized wholesale distributor For a location of the one nearest you call Embassy Industries Inc at 631 694 1800 7 SPARE PARTS...

Page 54: ...54 8 TECHNICAL DATA 8 1 Table of the technical data...

Page 55: ...d 8 3 Curves burner pressure input rating Where A AXIA 20E B AXIA 29E 8 4 Curves Efficiency input rating Where A AXIA 20E B AXIA 29E Efficiency Input rating kBtu hr Input rating kW Input rating kW Inp...

Page 56: ...00 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...

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