Crestron electronic 1.5, 3.5, 2.5 guide

Installation & Operation Manual

5 Hydronic piping (continued)

Figure 5-4Single Boiler - Alternate - Fixed or Variable Flow Primary System Piping

RELIEF

VALVE

BALL VALVE (TYPICAL)

FROM SYSTEM

BOILER DRAIN	AIR SEPERATOR

DRAIN PORT (TYPICAL)

SYSTEM

CIRCULATOR

Y-STRAINER (RECOMMENDED)

	EXPANSION
	TANK			TO SYSTEM
				TO SYSTEM
	PRESSURE	PRESSURE
	PRESSURE	REDUCING VALVE
	GAUGE	REDUCING VALVE	BACK FLOW	MAKE UP
	GAUGE		BACK FLOW	MAKE UP
			PREVENTER	WATER

	NOTICE	Please note that these illustrations are meant to show system piping concept only, the installer is responsible
	NOTICE	for all equipment and detailing required by local codes.
		for all equipment and detailing required by local codes.

29

Image 29

Crestron electronic 1.5, 3.5, 2.5 service manual For all equipment and detailing required by local codes

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 Determine boiler location Installation must comply withBefore locating the boiler, check Provide clearances Flooring and foundation Provide air openings to roomVent and air piping 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 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 Vent/air termination vertical Vertical direct ventingDetermine location Prepare roof penetrations 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 Outdoor temperature sensor EnableLouver proving switch Low voltage connections Alarm contacts Auxiliary switch 1Wiring of the cascade System supply sensor Field Wiring Condensate drain Condensate disposal Start-up Freeze protection when usedCheck/control water chemistry Fill and test water system Check thermostat circuits Check for gas leaksInspect condensate system Inspect/check condensate lines and fittings Start the boiler Final checks before starting the boilerIf boiler does not start correctly Check system and boiler 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 Service technician Maintenance Maintenance and annual startupOwner maintenance See the Crest User’s Information Manual for Instructions Maintenance Check water system Flue vent system and air pipingCheck expansion tank Check boiler relief valve Check all boiler wiring Check ignition ground wiringCheck control settings Check flame signal Review with owner Cleaning boiler heat exchangerHandling ceramic fiber materials Niosh stated First Aid Integrated Control Diagrams 2Wiring Diagram