General venting, Direct venting | Crestron electronic 1.5, 3.5, 2

Installation & Operation Manual

2 General venting

Direct venting

Sidewall

Vertical Vent, Sidewall Air

Vertical

Optional room air

Sidewall

Vertical

14

Image 14

Crestron electronic 1.5, 3.5, 2.5 service manual General venting, Direct venting, Optional room air

Contents

Save this manual for future reference Contents When servicing boiler Please read before proceeding Crest How it works Blowers Crest How it works Models 1.5 2.0 2.5 3.0 Ratings Crest Ahri Rating Before locating the boiler, check Installation must comply withDetermine boiler location Provide clearances Vent and air piping Provide air openings to roomFlooring and foundation Prevent combustion air contamination Areas likely to have contaminants When using an existing vent system to install a new boilerProducts to avoid When removing a boiler from existing common vent system Remove boiler from wood pallet 7Combustion Air from Outside Single Opening Minimum Recommended Combustion AIR Supply to Equipment Room Optional room air General ventingDirect venting Install vent and combustion air piping Air inlet pipe materials Approved Stainless Steel Vent Manufacturers Make Model Air intake/vent connections Removing from existing vent Common venting Determine location Vertical direct ventingVent/air termination vertical Prepare roof penetrations Multiple vent/air terminations 4Alternate Vertical Terminations with Multiple Boilers Sidewall direct venting Vent/air termination sidewall Prepare wall penetrations 2Clearance to Doors and Windows Room air 4Multiple Vent Terminations must also comply with Figure Hydronic piping 20F 40F 60F Circulator sizingModel Near boiler piping components System Multiple Boilers Common Header Primary / Secondary Flow For all equipment and detailing required by local codes Hydronic piping Model Gas Inlet Size Connecting gas supply pipingGas connections Natural gas Propane Gas GAS Piping Size Chart Check inlet gas supply Gas valve replacement Gas Pressure Line voltage connections Field wiringInstallation must comply with Louver proving switch EnableOutdoor temperature sensor Low voltage connections Wiring of the cascade Auxiliary switch 1Alarm contacts System supply sensor Wiring Field Condensate disposal Condensate drain Check/control water chemistry Freeze protection when usedStart-up Fill and test water system Inspect condensate system Check for gas leaksCheck thermostat circuits Inspect/check condensate lines and fittings If boiler does not start correctly Final checks before starting the boilerStart the boiler Check system and boiler For Your Safety Read Before Operating Set space heating operation Gas Natural Gas Propane Valve Set clock Verify HWG circulator mode Set HWG target temperatureConfiguration of the cascade Operating information General Protection features Boiler temperature regulation Outdoor reset operation, if used Cascade Sequence of operation Crest control module Home Screen 2Main Menu Screen Owner maintenance Maintenance Maintenance and annual startupService technician See the Crest User’s Information Manual for Instructions Maintenance Check expansion tank Flue vent system and air pipingCheck water system Check boiler relief valve Check control settings Check ignition ground wiringCheck all boiler wiring Check flame signal Handling ceramic fiber materials Cleaning boiler heat exchangerReview with owner Niosh stated First Aid Diagrams Integrated Control 2Wiring Diagram