Regency U46-NG and Operations Instructions

Part number 550-100-026/0404• Installation• Startup• Maintenance• PartsThis manual must only be used by a qualified heating installer/service technici

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual10Figure 2a Installing propane orifice (Ultra-155,Ultra-230 & Ultra-31

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/040411Prepare boiler (continued)Perform hydrostatic pressure testPressure test

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual12Install water piping3Install relief valve1. Install relief valve in ¾&qu

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/040413Install water piping (continued)3Figure 4 Expansion tank pipingSystem wa

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual14Install water piping (continued)3Figure 6 Pump curves for typical circul

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/040415Install water piping (continued)3Figure 7 Zone valve zoning plus optiona

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual16Install water piping (continued)3Figure 8 Circulator zoning plus optiona

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/040417Figure 9 Typical radiant heating systempiping plus optional DHWRadiant h

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual18Chilled water systems1. Install boiler so that chilled medium is piped i

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/040419Venting, combustion air & condensate line4Prepare condensate fitting

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual2THE BOILER, WITH PhPhPhPhPhDDDDD TECHNOLOGY – HOW IT WORKS . . .PhDPhD

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual20Connect condensate drain1. Remove condensate trap line from bag. Prepare

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/040421Gas piping5Connecting gas supply piping1. Remove jacket front panel and

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual22Table 4 Pipe capacity for 0.60 specific gravity natural gasGas piping (c

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/040423Startup6Check/control water chemistryDo not use petroleum-based cleaning

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual24Startup (continued)6Final checks before starting boiler❏Read the Ultra C

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/040425Startup (continued)6❏ Check flame & combustion1. Press and hold bot

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual26Check-out/startup verification7❏ Boiler and heat distribution units fill

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/040427Installation certificateBoiler model __________________CP number _______

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual28Annual startup and general maintenanceFollow the Service and maintenance

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/040429Annual startupThe boiler should be inspected and started annually, at th

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/04043THE GAS-FIRED WATER BOILER, WITH PhPhPhPhPhDDDDD TECHNOLOGY

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual30Annual startup (continued)Clean condensate trap1. Loosen condensate trap

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/040431Inspect ignition electrode1. Remove the ignition electrode from the boil

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual32Annual startup (continued)8aFigure 16 Burner assemblyPerform startup and

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/040433Maintenance — general8bReplace boiler jacket front door after startup or

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual34Cleaning boiler heat exchanger(continued from previous page)Access excha

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/040435Replacement parts9Miscellaneous parts and kitsReplace boiler jacket fron

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual36Replacement parts (continued)9Jacket parts

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/040437Replacement parts (continued)9Jacket parts

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual38Replacement parts (continued)9Heat exchanger and piping — Ultra-80 &

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/040439Replacement parts (continued)9Heat exchanger and piping — Ultra-80 &

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual4ContentsThe following defined terms are used throughout this manual to br

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual40Replacement parts (continued)9Heat exchanger and piping — Ultra-155 to -

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/040441Replacement parts (continued)9Heat exchanger and piping — Ultra-155 to -

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual429Replacement parts (continued)Controls

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/04044310Dimensions1. Boiler supply and return tappings are both 1" NPT (U

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual44RatingsDOE1. As an Energy Star Partner, Weil-McLain has determinedthat U

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/04045Please read before proceedingFailure to adhere to the guidelines on this

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual6Figure 1 Clearances requiredPrepare boiler location1Installations must co

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/04047Prepare boiler location (continued)1Flooring and foundationFlooringThe Ul

Part number 550-100-026/0404 GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual8Table 1 Corrosive contaminants and sourcesPrevent combustion aircontamina

GAS-FIRED WATER BOILER SERIES 2 — Boiler ManualPart number 550-100-026/04049Remove boiler from crateCold weather handling — If boiler has beenstored