IBC CX Series

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Air handler

Closely-spaced tees

Circulator sized for secondary piping only

Figure 35 Air handler on primary loop and direct domestic water piping

3.11.2 System piping

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Table of Contents3
Safety Information7
Manual Safety Markings7
Important Safety Instructions7
Known Contaminants9
Specifications11
Cabinet Dimensions12
CX 150 Dimensions12
CX 199 Dimensions13
Connection Specifications14
Introduction15
Standard Features and Benefits15
Warranty16
Before Installation17
Installation19
Code Requirements19
Removing an Existing Boiler19
Determining Location of the Appliance20
Best Installation Conditions21
Mounting the Boiler21
Connecting the Vent and Air Intake Pipes23
Installation Clearances24
Exhaust Venting and Air Intake24
Venting Code25
Venting Options25
Exhaust Vent Material25
Direct Vent26
Rooftop Vent Termination30
Sidewall Vent Termination32
Indoor Air Combustion Air Intake40
Combustion Air Filtration System41
Closet Installations42
Installing a Condensate Trap42
Installing a Condensate Neutralizer45
Water Piping (Space Heating)47
General Piping Best Practices50
System Piping50
Water Piping (Domestic Hot Water)59
Domestic Hot Water System59
Domestic Hot Water Piping61
Gas Piping64
Gas Pressure64
Electrical Connections65
Power Management, Quality and Electrical Protection66
120VAC Line-Voltage Hook-Up66
Other Wiring68
Thermostat / Sensor Wiring68
Wiring Zone Valves in Place of Pumps68
Thermostat Heat Anticipator69
About the Boiler Controller71
Controller71
Control Interface72
Before Operating the Boiler73
Important Pre-Ignition Checks73
Checklist for Electrical Conditions, Ducting and Water Connections73
Boiler Operation75
Lighting and Shutting down the Boiler75
Testing the Ignition Safety Shutoff76
Commissioning76
Checking a Boiler's Fuel Source77
Performing a Fuel Conversion77
Adjusting the Gas Valve78
Testing the LWCO Function82
Testing the Hi-Limit Cutoff Temperature Function83
Service and Maintenance85
Maintenance Checklist for Homeowner85
Maintenance Checklist for Heating Contractor85
Touchscreen Boiler Controller86
General Combi Boiler Maintenance87
Replacing the Fan, Gas Valve, and Burner90
Replacing the Fan91
Replacing the Gas Valve92
Replacing the Burner94
Maintenance of the On-Demand DHW Block96
Cleaning the Bypass Check Valve97
Replacing the Bypass Actuator97
Removing the Flow Sensor97
Cleaning the Water Strainer / Flow Restrictor97
Cleaning the Sight Glass98
Cleaning the Condensate Trap98
Ensure Door in Place101
Troubleshooting103
Electronic Components103
Temperature Sensors103
Fan104
Water Pressure Sensor104
DHW Flow Sensor105
Safety and Ignition Module (SIM+)105
Troubleshooting Error Messages107
Maximum Ignition Trials Error108
Hi Limit Cut-Off Temperature Error108
Low Water Cut-Off Error108
Aux. Interlock 1 or109
Miscellaneous Touchscreen Controller Errors109
Ignition Issues110
Temperature Issues111
Miscellaneous Issues112
Cycling Issues113
Appendices114
Wiring Diagrams114
Exploded Views of the CX 150, CX 199 Appliance117

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