A.O. Smith DB/DW-720-1810 warranty Thermometer Pressure Gauge, Safety Flow Switch

Page 19

TABLE 8.

	NO.	SUGGESTED ITEMS FOR INSTALLATION
	1.	SHORT PIPE NIPPLE AND PAIR OF BOILER LOOP TEES IN
		PIPING BETWEEN SYSTEM SUPPLY AND RETURN - ONE SET
		PER EACH BOILER
	2.	BOILER PIPE LOOP (See Piping Sizing Data Table 3.)
	3.	BOILER CIRCULATING PUMP (See Piping Sizing Data Table 3.)
	4.	THERMOMETER
	5.	PRESSURE GAUGE
	6.	LOW WATER CUT-OFF (If Required By Local Code.)
	7.	SAFETY FLOW SWITCH
	8.	RELIEF VALVE (Furnished with Boiler)
	9.	BOILER INLET - OUTLET
	10.	SYSTEM SUPPLY TEMPERATURE THERMOMETER
	11.	DRAIN OR BLOW-DOWN VALVE

FIGURE 14

19

Image 19

Contents TM Models DB/DW-720-1810 Installation Operation Maintenance Limited WarrantyReplacement Parts ContentsForeword Installation Clearances ROUGH-IN Dimensions CapacitiesLevelling Pressure Drop Electronic Intermittent Pilot Ignition Control FeaturesSafety Relief Valves Manual Reset High Temperature Safety Limit ControlDual Stage Models only HIGH/LOW Operator Automatic Reset High Temperature Limit ControlSafety Flow Switch Thermal BalancerAIR Requirements Installation InstructionsRequired Ability LocationDraft Hood Venting the BoilerVent Connection GAS Connections Connecting Boiler to a Common VentCorrect GAS PurgingExample High Altitude InstallationsWiring Connections Conventional InstallationsSystems Equipment Installation Circulating Pump Must be Properly Sized for Your Application Circulating PumpLOW Water Cutoff System InstallationTank Temperature Control Conventional Space Heating InstallationInstallation AS Boiler Replacement DB InstallationPage LINEAR-TEMP Space Heating Applications LINEAR-TEMP Space Heating InstallationsDuraMax Pump Performance Requirements Thermometer Pressure Gauge Safety Flow SwitchONE Boiler LINEAR-TEMP System Page Page Page Page Page Page ONE DURA-MAX Model DW Commercial Boiler with Vertical Tank Hard Water ConditionsONE DURA-MAX Model DW Commercial Boiler with Horizontal Tank NPT NPT Manifolding of Model TJV-120M & TJV-200M Tanks START-UP and Operating Instructions For Your Safety Read Before Operating Pilot Burner PrecautionsChecking and Adjusting the Input Internal ContaminantsTROUBLE-SHOOTING PRE-TROUBLE-SHOOTINGYES No Spark AT Pilot BurnerSpark AT Pilot Burner but Pilot will not Light Pilot Burner Lights but Main Burner does not Light Relief Valve General MaintenanceVenting Maintenance Heat Exchanger Preventive MaintenanceRemoval of AN Existing Boiler from a Common Venting System Deliming SolventsRemoving Light Deposits of Scale Mechanical Removal of DepositsDURA-MAX Limited Warranty Page Page Replacement Parts