PB Heat Essential Repair Parts Information for ViewSonic VP920B Models

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REPAIR PARTS

Figure 11.6:Controls/Circulator/Vent Damper

Table 11.6: Controls/Circulator/Vent Damper

	Item	Description	MI/MIH	MI/MIH	MI/MIH	MI/MIH	MI-07	MI-08	MI-09
	No.	Description	-03	-04	-05	-06	MI-07	MI-08	MI-09
	No.		-03	-04	-05	-06

	23	Honeywell L8148E1182 Limit w/ ³⁄₄″ Well*	51689	51689	51689	51689	51689	51689	51689

	24	Temperature-Pressure Gauge	51774	51774	51774	51774	51774	51774	51774

	25	Safety Relief Valve, 30 psi*, Conbraco 10-408-05	50501	50501	50501	50501	50501	50501	50501

		Safety Relief Valve, 50 psi*, Watts #350	99950	99950	99950	99950	99950	99950	99950

	26	Flame Roll-Out Safety Shut-Off Switch	51587	51587	51587	51587	51587	51587	51587

	27	Blocked Vent Shut-Off (Spill) Switch – MI Only	90592	90592	90592	90592	90592	90592	90592

	27	Blocked Vent Shut-Off (Spill) Switch – MIH Only	90593	90593	90593	90593	90593	90593	90593

	28	Vent Damper	90612	90612	90613	90613	90614	90615	90615

		*Available from distributor

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Contents Series MI/MIH Table of Contents Using this Manual Installation SequenceSpecial Attention Boxes Clearance from Combustible Construction PreinstallationAccessibility Clearances AIR for Combustion and VentilationAir Openings All Air from Indoors on Different Floors Air Openings All Air from Outdoors through Vertical Ducts Installation Survey Planning the LayoutBoiler SET-UP Water Piping and Controls Boiler Supply and ReturnSafety Relief Valve Parallel Hook-Up with Water ChillerPiping for Zoned Systems Zone Piping with Zone ValvesExpansion Tank INDIRECT-FIRED Water HeaterFreeze Protection Vent Damper Installation General VentingIntegral Draft Hood Vent Piping and Chimney Venting with Vent Damper in Vertical PositionBoiler Removal from Common Venting System Seal any unused openings in the common venting systemGAS Piping Gas Connection to BoilerMIH Boiler Natural Gas Wiring Controls Zoned System WiringElectrical Sequence of Operation Wiring and Connection Diagram Intermittent Ignition Intermittent Ignition System Operating Sequence Zone Wiring with Zone Valves START-UP Procedures Completing the InstallationValve Tapping and Adjustment Screw Locations Operating Instructions For Your Safety Read Before Lighting Adjustment of GAS Pressure Regulator Adjustment of Pilot GAS FlowControl Descriptions CHECK-OUT Procedure Checking Burner InputSTART-UP Procedures Troubleshooting Troubleshooting GuidesProblem Possible Causes Corrective Actions Intermittent Ignition System Troubleshooting Sequence Maintenance Weekly with Boiler in USE GeneralDaily with Boiler in USE Monthly with Boiler in USEAnnually Before Start of Heating Season Standing Pilot and Main Burner FlameBoiler Dimensions & Ratings Series MI/MIH Boiler DimensionsRepair Parts Repair Parts Series MI/MIH GAS Boiler2Manifold Manifold/Gas Train MI Standing Pilot 3b Gas Valve and Pilot Intermittent 4Block/Draft Hood 4a Block/Draft Hood 5Jacket 6Controls/Circulator/Vent Damper Series MI/MIH