RBI Futera XLF Series Manual

RBI Futera XLF Series Manual Manual pdf 26 page image

26Finned copper tube gas boilers & water heaters – Boiler manual FTXLF-IOM-HN-1-110308 Copyright 2008 Mestek, Inc.The following start-up procedure assumes that all waterpiping, gas piping and electrical connections are correctas stated in this manual and the installation meets allState, Local, and City codes.See the Futera XLF Control IOM for troubleshootinginformation and control operation.operAtinG instrUctionsoperating instructionsIf, at any time, the boiler will not operate properly, follow the in-1. structions "TO TURN OFF GAS TO APPLIANCE," page 28,and call your service technician or gas supplier.Turn off all electrical power to the boiler.2.Close main gas shut-off valve (field supplied), Figure 16,3. page 22.Purge the gas piping up to the boiler's manual gas valve (located4. ahead of the main gas valve). When the bleeding is complete,check all gas joints up to the gas valve for leaks.Wait five (5) minutes to clear out any gas.5.Make sure all limits, pressures switches and safety device contacts6. are closed.Open the main gas shut-off valve.7.Disable any external call for heat, such as from a building manage-8. ment system or remote operating controller.Toggle the remote/local switch (in control cabinet — see Fig-9. ure 18) to remote.Turn on electrical power to the boiler.10.Turn the power switch on the front of the boiler control cabinet11. to on.The HeatNet display will light up when the power is on. If all in-12. terlocks are properly closed, the display will say stAnDBy. If not,refer to the XLF HeatNet Control IOM for troubleshooting.Slide the HeatNet control's low fire switch (on HeatNet control13. board) to the LoW Fire position.The boiler will begin the start-up sequence.14.Allow the boiler to pre-purge and enter the pilot ignition cycle.15.If pilot lights (indicated by a good flame signal 5.0 V DC) proceed16. to step 18. (See Honeywell R7800 literature for use of a meter tocheck flame signal if keypad readout is not available.)If pilot is unstable (indicated by a low or erratic flame signal caus-17. ing pilot flame failure), toggle the low fire switch to DisABLe,then back to enABLe to start another cycle (reset the Honeywellcontrol if necessary). Repeat for one or two more times to ensurethe pilot line is purged of all air. If pilot is still unstable, the pilotgas pressure may need to be increased. See step 18.Pilot pressure adjustment:18.Switch the Honeywell control toa. test position within thefirst 10 seconds of the pilot ignition sequence.Connect one side of a manometer or pressure gauge to theb. manometer pressure port (barbed) on the pressure test mani-fold (located inside control panel). See Figure 18. Leave theother side of the manometer open to the room. DO NOTconnect it to the reference port (left side of panel).Manometer connections to the test manifold (inFigure 18control cabinet)Measure pilot gas pressure by pressing and holding the ser-c. vice valve marked piLot GAs.Set pilot gas pressure to 3.0 inches w.c. (± 0.5 inch) by adjust-d. ing the pilot gas pressure regulator, inside the air box. Accessfrom the boiler top cover. See Figure 19.Access to air trim adjustment and pilot regulatorFigure 19Check pilot air pressure using service valve markede. piLotAir .Pilot air pressure should be 0.60 inches w.c. (± 0.10 inches).f.Combustion readings must be in the range specifiedin the following instructions. Adjust the boiler asnecessary to ensure proper combustion.