Room air | Crestron electronic 2.5, 3.5, 1.5 specs

Installation & Operation Manual

4 Sidewall direct venting (continued)

2.Place wall penetrations to obtain minimum clearance of 12 inches (305 mm) between vent pipe and adjacent air inlet, as shown in FIG. 4-4 for U.S. installations. For Canadian installations, provide clearances required by CSA B149.1 Installation Code.

3.The air inlet of a Crest is part of a direct vent connection. It is not classified as a forced air intake with regard to spacing from adjacent boiler vents.

Figure 4-4Multiple Vent Terminations (must also comply with Figure 4-1)

	VENT
	AIR
	12"
36" MIN
48" MAX	36"
	12"
12" MIN

Figure 4-5Direct Vent Terminations

DIRECT VENT TERMINATIONS

Air Inlet	Vent Termination
Dryer Inlet	Straight

Figure 4-6Room Air (Direct Exhaust Terminations)

ROOM AIR (DIRECT EXHAUST TERMINATIONS)

Vent Termination

23° Elbow

45° Elbow

90° Elbow

Room air

The Crest boiler may be installed with a single pipe carrying the flue products to the outside while using combustion air from the equipment room.

Follow the requirements in the General Venting, Sidewall Direct Venting, and Vertical Direct Venting sections for vent material specifications, vent length requirements, and vent termination requirements.

Install the air inlet cover (shipped loose with the boiler) per FIG. 4-7. Combustion and ventilation air must be supplied to the equipment room per the requirements on pages 12 and 13 of this manual for proper operation of the Crest boiler when utilizing the single pipe method.

Figure 4-7Room Air Installation

AIR INLET COVER

90° Elbow

Mitered

23° Elbow

23

Image 23

Crestron electronic 2.5, 3.5, 1.5 service manual Room air, 4Multiple Vent Terminations must also comply with Figure

Contents

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