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7.3.2 Replacing the gas valve in EX 700 and EX 850 models

Four (4) bolts connecting gas valve and mixing device. Keep gasket and bolts for re-
assembly.

Location of high gas pressure switch.

Gas valve inlet: Four (4) bolts of the flange. Keep gasket and bolts for re-assembly.

Low gas pressure switch.

Gas valve electrical connector

Gas valve outlet: Four (4) bolts of the flange. Keep gasket and bolts for re-assembly.

Supporting bracket for gas valve

Black tubing

Figure 71

Accessing the gas valve - EX 700, 850

1. Turn off the electric power and gas supply to the boiler.

2. Ensure that the boiler cools down to the surrounding temperature. Do not drain the boiler

unless freezing conditions are expected during this procedure.

Section: Service and maintenance

Summary of Contents for EX Series

Page 1: ...ble vapors and liquids or other combustible materials in the vicinity of this or any other appliance If you smell gas Do not try to light any appliance Do not touch any electrical switch do not use an...

Page 2: ...in the system A high water volume system with a low hardness count may cause as much damage as a system with less volume and higher hardness so it is recommended to treat water so as to remove all di...

Page 3: ...ditions 16 3 3 Unpacking a boiler 17 3 4 Installation clearances 18 3 5 Exhaust venting and air intake venting 18 3 5 1 Code 19 3 5 2 Applications 21 3 5 3 Exhaust vent material 21 3 5 4 Vent travel 2...

Page 4: ...nections 63 6 0 Boiler operation 65 6 1 Lighting and shutting down the boiler 65 6 2 Testing the ignition safety shutoff 66 6 3 Commissioning 66 6 3 1 Checking a boiler s fuel source 66 6 3 2 Performi...

Page 5: ...the EX 700 and EX 850 models 100 7 4 Replacing the air filter 102 7 5 Cleaning a condensate trap 103 8 0 Troubleshooting 105 8 1 Preliminary checks 105 8 2 Electronic components 106 8 2 1 Temperature...

Page 6: ...Appendices 119 Wiring diagrams 119 Installation Commissioning Report 123 Boiler parts diagram EX 400 and EX 500 125 Boiler parts diagram EX 700 and EX 850 129 Revision history 133 4 Section Contents...

Page 7: ...es to death Keep instructions near the air handling appliance for future reference Danger Do not store or use gasoline or other flammable vapors or liquids in the vicinity of this or any other applian...

Page 8: ...ish removers Sodium chloride or potassium chloride used for water softening Adhesives used to fasten building products and other similar products Chemicals in perming solutions Chlorinated waxes or cl...

Page 9: ...non condensing 90 90 90 90 Minimum water temp F C 34 1 34 1 34 1 34 1 Maximum water temp electronic hi limit F C 190 88 190 88 190 88 190 88 Max T supply return electronic fence F C 80 44 80 44 80 44...

Page 10: ...alves can be purchased 30 100 125 and 150 Connection specifications The following table displays the required connection specifications for each model EX 400 EX 500 EX 700 EX 850 Flue Outlet 4 Schedul...

Page 11: ...Cabinet dimensions Figure 1 Frontal view EX 400 EX 500 Figure 2 Back view EX 400 EX 500 Figure 3 Top view EX 400 EX 500 9 Cabinet dimensions...

Page 12: ...Figure 4 Frontal view EX 700 EX 850 Figure 5 Back view EX 700 EX 850 Figure 6 Top view EX 700 EX 850 10 Section Specifications...

Page 13: ...n IBC s range of large commercial boilers is the solution for large scale projects such as apartment buildings office buildings big schools hospitals and hotels Figure 7 Front internal view Figure 8 B...

Page 14: ...s Maximum allowable T 80 F 44 C 50 psi relief valve 345 kPa Boiler pump control up to H P 120V or 208 240V 1 2 Warranty IBC offers a 10 year limited warranty on the EX series heat exchanger and a 2 ye...

Page 15: ...carpeting At a new construction site or during renovations protect the boiler from drywall dust or other construction related contaminants Draw combustion air from a clean source e g outdoors and iso...

Page 16: ...rooftop or sterile wall location Boiler condensate is corrosive Protective measures must be taken to prevent corrosion damage to metal roofs or other metal building components in contact with the cond...

Page 17: ...ndard for Controls and Safety Devices for Automatically Fired Boilers ANSI ASME CSD 1 If there is any conflict follow the more stringent regulations Conform to the current National Fuel Gas Code ANSI...

Page 18: ...ouling or agricultural vapors Exposure to corrosive chemical fumes such as chlorinated and or fluorinated hydrocarbons can reduce the life of a boiler See list of Known contaminants on page 6 For this...

Page 19: ...g Use the brackets provided to secure the boiler to the floor 3 3 Unpacking a boiler The boiler is shipped bolted to a pallet with four 4 anchor brackets and 3 8 Hex head bolts Once the anchor bracket...

Page 20: ...Bottom 0 0 Table 3 Clearance distances for boiler mounting sites 3 5 Exhaust venting and air intake venting Warning Venting condensate drainage and combustion air systems for all IBC boilers must be i...

Page 21: ...st be installed in accordance with the requirements of the jurisdiction having authority in Canada Part 8 Venting Systems of the B149 1 10 Code and any other local building codes are to be followed In...

Page 22: ...ical Close all building doors and windows such as doors adjacent to appliances remaining connected to the common venting system and other spaces of the building Turn on clothes dryers and any applianc...

Page 23: ...ULC S636 Standard for Type BH Gas Venting Systems or stainless steel Type BH venting systems The vent temperature is limited by the boiler controller with the use of a flue temperature sensor to ensu...

Page 24: ...the venting material Fully insert the approved venting material into the boiler s exhaust outlet and tighten clamp to ensure the venting connection is locked in place as shown below Figure 11 Securin...

Page 25: ...e 4 Maximum Exhaust Venting Length for EX 400 500 700 and 850 models For example for an EX 850 using 6 x 90 CPVC vent elbows the maximum lineal measure of pipe allowed is 90 feet 120 6 x 5 30 90 Note...

Page 26: ...t connections are liquid and pressure tight Prior to firing the boiler and before any of the venting run is concealed by the building construction the installer must test the exhaust joints under fan...

Page 27: ...ern about rain infiltration rain will drain away through the condensate trap Optional bird screen may be placed in a termination fitting Leave unglued and hold in place with a short nipple This permit...

Page 28: ...cally drained so it must be terminated with a down turned elbow as shown The intake pipe does not need to penetrate the roof at the same elevation as the exhaust as shown lower down on the roof is acc...

Page 29: ...minimum of 2 61 cm above the roof line plus the anticipated snow line 3 5 7 Sidewall vent termination Caution Vent termination clearances in this section are code minimum or IBC recommended minimum re...

Page 30: ...to side of opening 3 91 cm C Clearance to permanently closed window D Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2 61 cm from the center line o...

Page 31: ...to side of opening 1 30 cm above opening 3 91 cm K Clearance to mechanical air supply inlet 6 1 83 m L Do not terminate above paved sidewalk or paved driveway Slip hazard due to frozen condensate Slip...

Page 32: ...assing through the wall then to gain the required clearance configure as shown in Figure 17 Figure 18 and Figure 19 Use a 45 elbow on the exhaust termination to launch the plume up and off the sidewal...

Page 33: ...Figure 19 Sidewall vent termination configuration option 1 Figure 20 Sidewall vent termination configuration option 2 31 3 5 7 Sidewall vent termination...

Page 34: ...glues Refrigerant leaks from cracks in coils Paint or varnish removers Sodium chloride or potassium chloride used for water softening Adhesives used to fasten building products and other similar produ...

Page 35: ...oors Direct Vent installation check air intake outside is clear of obstructions Combustion air from outdoors Use reducing coupling to transition from 4 connection to 6 venting before first elbow Boile...

Page 36: ...r view combustion air intake Notes When installing air intake piping ensure that a trap is not formed in the piping causing a build up of water and blockage of intake air Such blockages will cause a b...

Page 37: ...used intake travel cannot be added to the exhaust Unequal intake and exhaust piping is allowed Ensure that adequate separation is maintained between the air intake inlet and the vent terminal Refer to...

Page 38: ...ngs Provisions for combustion and ventilation air must be made as follows in the USA in accordance with the National Fuel Gas Code ANSI Z223 1 latest edition or applicable provisions of the local buil...

Page 39: ...propriate hangers to maintain that gradient For PPs venting follow the manufacturer s requirements This will ensure proper drainage and prevent condensate from clogging Ensure the supplied trap is cor...

Page 40: ...ttach the elbow and union nut firmly to the boiler s outlet tube making sure that you rotate the elbow sideways 3 Fill the condensate trap with water and insert the trap into the hole of the metal pla...

Page 41: ...rsonal injury or death 3 7 Installing a condensate neutralizer If discharging condensate into building drain piping materials that are subject to corrosion use a neutralization package Warning After i...

Page 42: ...ate water line of the appliance Condensate neutralizer Drain materials subject to corrosion must be protected by acid neutralization Warning Risk of injury Tank fluid can be highly acidic Do not use h...

Page 43: ...itate out of the fluid onto the hottest part of the heat exchanger impairing heat transfer and resulting in overheating and premature failure The amount of solids that may form on the heat exchanger w...

Page 44: ...settings will run the Load pump for 5 minutes to place the legacy heat where it is useful Any secondary pump can be set to run for 0 900 seconds in the heat purge mode Guard against deadheading pumps...

Page 45: ...Is connected from the valve outlet with no intervening valve and directed downward to a safe point of discharge Allows complete drainage of both the valve and the discharge line Is independently suppo...

Page 46: ...quality is in question or when chemical treatment or glycol is required other options should be considered Follow the applicable codes and good piping practice Warning Close the fill valve after any...

Page 47: ...flow rate might drop below minimum requirements 18 or 21 gpm depending on model For further information and details consult our Concept Drawings which provide detail on specific single and multiple bo...

Page 48: ...boiler Optional external water high limit manual reset The IBC EX series comes factory equipped with an internally mounted manual reset mechanical water temperature high limit It can be fitted with a...

Page 49: ...ck valves Return lines from loads Expansion tank connection point of no pressure change should be on the suction side of the circulator Primary pump or boiler circulator into connection at rear of boi...

Page 50: ...iler Closely spaced tees To avoid induced flow install each set of tees with straight piping a minimum of 8 pipe diameters upstream and 4 pipe diameters downstream Avoid using elbow or other component...

Page 51: ...at loop Alternatively use check valves on both supply and return of secondary piping Figure 30 Important Primary Secondary piping details with closely spaced tees DHW indirect tank Air handler Low tem...

Page 52: ...DHW indirect tank Air handler Check valves may be integral to pumps not shown Figure 32 Two pump two load parallel piping concept 50 Section Installation...

Page 53: ...ing valves Check valve typical of each boiler may be integral to pump Tridicator shipped with boiler typical of each boiler Pressure relief valve shipped with boiler typical of each boiler Boiler pump...

Page 54: ...ler Boiler pump into rear connection typical of each boiler Low loss header hydraulic separator shown or closely spaced tees bridge to load piping Check valve for opt out circuit Opt out pump into rea...

Page 55: ...t pressure above the boiler s minimum specification at all firing rates and will not exceed the boiler s maximum pressure rating when locked up with no load 3 9 1 Gas pressure The boilers require a mi...

Page 56: ...he boiler must be disconnected or otherwise isolated from the gas supply during any pressure testing of the system at test pressures in excess of psig Dissipate test pressure prior to reconnecting The...

Page 57: ...e hook up Line voltage wiring is done within the field wiring box see Wiring diagrams on page 119 Connect the boiler to the grid power using a separate fused circuit and on off switch within sight of...

Page 58: ...ellow wire from the pair labeled Boiler Pump Wire the pump s neutral to the white wire labeled AC In Do not attempt to connect the boiler pump to the pump zone valve terminal block along the controlle...

Page 59: ...upted fan turns at ultra low rpm for 90 minutes after burner shutdown Treat it like a computer where you do not just pull the plug when done If a low airflow check vent error signal shows check for an...

Page 60: ...bottom pair of contacts labeled External Control receives a 0 10VDC default or 4 20 mA signal from an external boiler controller for direct throttle control The boiler s own sensors act as high limits...

Page 61: ...pplicable with the EX modulating series boilers For a heat load where zone valves are used to manage thermostatically controlled zones each room s thermostat heat anticipator should be adjusted to the...

Page 62: ...Intentionally left empty...

Page 63: ...ation of two similar water temperature loads Programmable setback override schedule The control can manage or operate in a network of up to 24 IBC boilers without additional controller Some of the new...

Page 64: ...any or all errors since original power up complete with the date and time of the error 4 2 Controller interface The control interface is provided through a 2 x 4 inch color touchscreen display The tou...

Page 65: ...shut off do not turn off or disconnect the electrical supply to the pump Instead shut off the gas supply at a location external to the appliance 5 1 Important pre ignition checks Once installation of...

Page 66: ...full turn counterclockwise using a small 1 8 or 3 mm flat screwdriver Connect a manometer and open the gas control valve Requirements are minimum 4 w c and maximum 14 w c Check that there are no gas l...

Page 67: ...Check Followed lighting and shutting down procedure Tested the ignition safety shutoff function see Testing the ignition safety shutoff on page 66 Checked the appliance s fuel source and if necessary...

Page 68: ...tain optimum combustion results Note that only qualified technicians using properly functioning and calibrated combustion analyzing equipment should perform a mixture adjustment 6 3 1 Checking a boile...

Page 69: ...l listed on its rating plate is prohibited Failure to follow the instructions on converting to alternate fuels can result in a fire or explosion which may cause property damage personal injury or loss...

Page 70: ...n components EX 400 500 Fan Mixing device Gas high pressure switch Three 3 wire Molex plug Inlet gas pressure test port location of Gas low pressure switch Low fire adjustment zero offset High fire ad...

Page 71: ...g and Adjustment c Placing conversion labels associated with the new fuel onto the boiler Fuel conversion kit part numbers Model Number Natural Gas to Propane Propane to Natural Gas EX 400 P 1236 P 12...

Page 72: ...e side ensuring that the O ring is well seated in the groove 10 Secure the elbow with bolts on the mixer side ensuring that the O ring is well seated in the groove 11 Turn on the electric power and ga...

Page 73: ...ed to the air filter box See on image above 5 Use an Allen key to remove the Six 6 6 mm screws connecting the mixing device to the fan See in image above Carefully separate the two parts remove and re...

Page 74: ...is load should be large enough to allow the boiler to operate at high fire for over 10 minutes 1 Shut off the gas supply 2 On the gas valve loosen the inlet gas pressure test port screw counter clockw...

Page 75: ...right of the gas valve see m on Figure 43 Do not perform a test from the manifold gas pressure test port Ensure that you have a load configured Reset Heating Set Point or DHW This load should be larg...

Page 76: ...s pressure test port 8 Insert the bolt head and tighten using a 3 mm Allen wrench 6 3 4 Adjusting the gas valve EX 400 EX 500 Danger Making adjustments to the IBC gas valve without a properly calibrat...

Page 77: ...ion on this adjustment you may notice a significant backlash 5 Check the results and confirm the correct settings when you return the boiler to high fire and then to low fire Note Clock the gas meter...

Page 78: ...b Click inside the Fan Test Heat Output box and using the number pad enter the minimum MBH c Select OK The fan runs to the minimum MBH you have set Select the Fan Test Heat Output box to change the h...

Page 79: ...15 wc After the gas to the boiler is connected and turned on you must reset the gas low pressure switch High pressure switch Low pressure switch Figure 49 Gas low high pressure switches EX 400 and EX...

Page 80: ...Intentionally left empty...

Page 81: ...needed Inspect system for unusual noises Call your local heating contractor for service if needed As needed Keep vent terminals clear of obstructions snow dirt etc As needed Inspection of the boiler...

Page 82: ...as been re filled completely before firing boiler Annually If condensate neutralization is used check the pH level of condensate discharge Annually 7 1 3 Burner Maintenance Required for Burner Frequen...

Page 83: ...quality there may be a build up of black plaque typically sulfur Other fouling agents include airborne dust debris and volatiles With the burner removed examine the heat exchanger for signs of contami...

Page 84: ...05 7 1 8 Water Checks for Water in the Boiler Frequency Check Check water pressure and temperature There should be no noticeable change if boiler is functioning normally Check for any noise in the sys...

Page 85: ...e glycol antifreeze or undiluted antifreeze of any kind This may result in severe boiler damage It is the responsibility of the Installer to ensure that glycol solutions are formulated to inhibit corr...

Page 86: ...he valve to snap shut If the lever does not activate or if there is no sign of discharge discontinue use of equipment immediately and contact a licensed contractor or qualified service personnel If th...

Page 87: ...maintenance procedures for EX 400 and EX 500 models Replacing the fan Replacing the gas valve Replacing the burner Fan Shutoff valve Manifold gas pressure test port Inlet gas pressure test port High p...

Page 88: ...r A ladder or step may be required to have a clear vertical view of the work area Do not attempt to reach from the front without a clear view as damage to connectors screws or refractory may occur 4 U...

Page 89: ...ve in the EX 400 and EX 500 models 1 Turn off the electric power and gas supply to the boiler 2 Ensure that the boiler cools down to the surrounding temperature 3 Remove the front cover and then remov...

Page 90: ...the gas valve by gripping near its base and put aside Figure 55 Silicone air pressure tube 6 From the inlet side of the gas valve see on Figure 51 remove the four 4 screws using a 4mm Allen key and pu...

Page 91: ...rings are well seated in their grooves Tip Lightly hand tighten each screw before tightening all four screws fully on both the outlet and inlet sides of the gas valve To prevent gas leaks ensure that...

Page 92: ...Certified under 42 CFR 84 for selection and use of respirators certified by NIOSH For the most current information NIOSH can be contacted at 1 800 356 4676 or on the web at www cdc gov niosh 2 Wear lo...

Page 93: ...59 Air intake clamp and gasket assembly 5 When loose slide off the clamp and gasket assembly and put aside with screws and Nylok nuts for reassembly Figure 60 Removal of clamp and gasket assembly 6 Pu...

Page 94: ...trical connectors see jand kon above image 9 Remove the four 4 bolts from the right side of the gas valve 10 Remove the four 4 bolts that attach the mixing device to the fan Figure 63 Removing bolts s...

Page 95: ...k to avoid ingesting particles from the refractory 16 Loosen the eight 8 bolts securing the lid to the heat exchanger using a 5 mm Allen key 17 To help realign the heat exchanger lid with the heat exc...

Page 96: ...ew the ignitor from the lid and place in a safe place 20 Remove the burner and gasket The burner gasket may be brittle and break in the process Replace if necessary Figure 67 Removing bolts securing b...

Page 97: ...in place 8 Attach the mixing device to the fan with the bolts 9 Replace the bolts on the right side of the gas valve Figure 69 Bolts on right side of gas valve 10 Reattach the electrical connectors to...

Page 98: ...For instructions see Adjusting the gas valve EX 400 EX 500 on page 74 7 3 Replacing the fan gas valve and burner in EX 750 and EX 800 models This section documents the following maintenance procedures...

Page 99: ...ectors from the fan and position them out of the way of the fan 5 To separate the mixing device from the fan remove the 6 x 6mm bolts Note how the mixing device is positioned on the fan before separat...

Page 100: ...gas pressure switch Gas valve electrical connector Gas valve outlet Four 4 bolts of the flange Keep gasket and bolts for re assembly Supporting bracket for gas valve Black tubing Figure 71 Accessing t...

Page 101: ...side 7 Pull the black tubing see on Figure 71 from the push to connect fitting on the gas valve outlet side 8 Disconnect the three 3 wire Molex plug from the gas pressure switches 9 Unscrew the two 2...

Page 102: ...d at 1 800 356 4676 or on the web at www cdc gov niosh 2 Wear long sleeved loose fitting clothing gloves and eyes protection 3 Assure adequate ventilation 4 Wash with soap and water after contact 5 Wa...

Page 103: ...m hex bolts that attach the fan to the heat exchanger lid An open ended wrench or socket is required 13 With the mixing device still attached remove the fan by pulling straight up ensuring that no wir...

Page 104: ...r filter should be inspected and or replaced monthly When replacing the air filter in the appliance use a MERV 8 filter sized at 10 x 10 x 1 1 Remove the two screws of the air filter lid and set aside...

Page 105: ...nstructed on cleaning and refilling the trap Warning If condensate neutralization is used check the pH level of condensate before and after neutralization to verify effectiveness and ensure that the d...

Page 106: ...ndensate trap to the top with water 5 Reinsert the condensate trap through the metal plate 6 Rotate the elbow and tighten the union nut so that elbow and condensate trap are secured Ensure the union n...

Page 107: ...er supply gas flow and resetting the thermostat control 8 1 Preliminary checks The first step in troubleshooting this system should be a review of the touchscreen controller There are a number of diag...

Page 108: ...g their respective Molex connectors Place multi meter probes into the sensor s female Molex connector socket Do not apply voltage to the sensor as damage may result The supply water and vent temperatu...

Page 109: ...ustion air intake or the exhaust vent becomes too restricted for safe operation the boiler will stop firing and display a Fan Pressure Error Also to prevent avoidable Fan Pressure Errors the system de...

Page 110: ...the High or Low pressure switch If either the high or low gas pressure switch trips the boiler controller will show a Red bar at the bottom of the screen and indicate Low High Gas Pressure 8 2 6 Safe...

Page 111: ...Rapid flash On Igniting Off Flashing Lockout Flash alternately with LED 2 Flash alternately with LED 1 Fail safe Boiler requires a power cycle Table 13 SIM LED status Indicators 8 2 6 2 Low water cuto...

Page 112: ...ton The message The SIM Module has been reset is displayed 3 Tap the Close button and then tap the Back button until you return to the Home screen 8 2 6 5 Water Temperature function reset and test The...

Page 113: ...is displayed 7 To reset the boiler select the Reset button The cutoff value reverts to normal upon reset The message The SIM module has been reset is displayed 8 Tap the Close button and then tap the...

Page 114: ...Manual gas shutoff is closed or gas line not fully purged Check for gas flow Open manual gas shutoff and reset boiler Gap between ignition probe rods is too large or too small Adjust ignition probe ro...

Page 115: ...it Boiler is in hard lockout mode See Water Temperature function reset and test on page 110 8 3 5 Low Water Cut off error Low Water Cutoff Error Issue Diagnosis Fix Error Low Water Cutoff The Safety a...

Page 116: ...ensor Error Max Inlet Outlet Sensor Temp Exceeded Check water flow Water temperature signal not within acceptable range Potential flow or sensor failure Consult service technician Current outlet tempe...

Page 117: ...l via analyzer Check for proper gas piping Check pressure with manometer during ignition Boiler will not attempt to ignite Fan and pump are operating normally No power to ignition control module Check...

Page 118: ...evel Defective thermostat Refer to manufacturer s instructions Obstruction in condensate drain Inspect and clean condensate drain appliance cycling on operating safety controls Check operation with Oh...

Page 119: ...Water Cutoff won t clear Boiler is in 1 hour safety lockout Reset safety device and cycle boiler power off and on to reset error DHW taking too long to heat Sensor may be under reading actual water te...

Page 120: ...Confirm adequate pump size and temp rise in the heat exchanger Slow combustion air blower Check that CO2 level is within specification Dirty burner heat exchanger Check pressure drop Low water flow du...

Page 121: ...Appendices Wiring diagrams Figure 73 Controller electrical diagram 119 Appendices...

Page 122: ...Figure 74 Internal wiring diagram EX 400 and EX 500 models 120 Section Appendices...

Page 123: ...Figure 75 Internal wiring diagram EX 700 and EX 850 models 121 Wiring diagrams...

Page 124: ...Figure 76 Sequence of Operation 122 Section Appendices...

Page 125: ...__ System Filled type concentration of any glycol chemicals used _________________________ Air purge completed Relief Valve correctly installed and piped Relief valve try lever test performed Condensa...

Page 126: ...Intentionally left empty...

Page 127: ...Module 500 105 P 270B 40 Top panel 251 030 P 1227 50 Controller module chassis 251 042 P 1248 60 Boiler pump relay 240 165 P 1233 70 Transformer 240 008 P 9059 80 Air pressure sensor behind controlle...

Page 128: ...126 Boiler parts diagram EX 400 and EX 500...

Page 129: ...72 Replacement air filters 180 126 P 381 190 High pressure switch 180 276 P 1250 200 Low pressure switch 180 277 P 1249 210 Gas line 190 208 P 1242 200 Fan gasket 250 322 P 311 210 Heat exchanger lid...

Page 130: ...Item Number Description Part Number Replacement Part Number 350 Low water cut off probe 240 143 P 9078 360 Supply Water temperature sensor 240 159 P 1225 370 Tridicator field installed 180 283 P 1234...

Page 131: ...tion Module 500 105 P 270B 40 Top panel 251 030 P 1227 50 Controller module chassis 251 042 P 1228 60 Boiler pump relay 240 165 P 1233 70 Transformer 240 008 P 1259 80 Air pressure sensor behind contr...

Page 132: ...130 Boiler parts diagram EX 700 and EX 850...

Page 133: ...10 Gas valve 500 147 P 1215B 220 Gas line 190 201 P 1216 230 Heat exchanger lid gasket 255 125 P 1222 240 Refractory 255 123 P 1218 250 Burner 180 270 P 1224 260 Burner gasket 255 128 P 1223 270 Heat...

Page 134: ...er 350 Low water cut off probe 240 143 P 9078 360 Supply Water temperature sensor 240 159 P 1225 370 Tridicator field installed 180 283 P 1234 380 Relief valve field installed 180 279 P 1205 390 Vent...

Page 135: ...ember 2019 Updated figure 36 and added new sections on measuring the inlet gas pressure and resetting the gas high low pressure switches R2 February 2020 Introduction of the new EX 400 and EX 500 mode...

Page 136: ...77 0277 T 856 877 0544 F 604 877 0295 F 856 735 5584 Toll Free 1 844 HEAT IBC 1 844 432 8422 www ibcboiler com Information in this document is subject to change without notice IBC assumes no responsib...

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