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NORA Oilheat Technicians Manual

Oilheat Technician’s Manual Immersion Aquastat ....................................................... 12-19 Indirect Fired Water Heating ........................................... 13-18, 13-19 Intermittent Duty ............................................................ 11-5 Interrupted Duty ............................................................. 11-5 Jacket Heat Loss ........................................................... 16-9 Limit Controls ................................................................. 12-3, 12-8, 12-10 fan and limit controls ............................................ 12-8, 12-10 fan switch ............................................................ 12-9 testing .................................................................. 12-24 troubleshooting ..................................................... 12-13 Lock Out Tag Out ........................................................... 8-27 Low Voltage and Line Voltage Thermostats ...................... 12-6 Low Water Cutoff ........................................................... 12-16 Magnetism, Electricity .................................................... 8-14 Main Vents ..................................................................... 13-17 Mercury Tube Pressure Switch ....................................... 12-15 Motors ........................................................................... 10-3 amperage ............................................................. 10-5 circuits ................................................................. 10-9 components ......................................................... 10-3 diagnosing motor troubles ..................................... 10-6 oiling .................................................................... 10-4 overload, causes of .............................................. 10-5, 10-7 replacement ......................................................... 10-13 reverse rotation .................................................... 10-7 testing chart ......................................................... 10-9 troubleshooting ..................................................... 10-10, 10-11, 10-16 windings ............................................................... 10-3, 10-12 wiring ................................................................... 10-5, 10-7, 10-15 Multimeter ...................................................................... 8-18, 10-11, 10-12 Nozzles .......................................................................... 5-3 after-drip .............................................................. 5-14 air-oil mixing ......................................................... 5-10 anti-drip valve ....................................................... 5-16 capacities ............................................................ 5-5 care and service ................................................... 5-9 construction ......................................................... 5-3 double filtration ..................................................... 5-8 5-12 droplet size vs. oil temperature ............................. 5-12 flow rates ............................................................. 5-6, 5-8, 5-12 how it works ........................................................ 5-4 metering ............................................................... 5-4 nozzle line pre-heater ........................................... 5-13 patterning ............................................................. 5-4 pressure ............................................................... 5-4, 5-10 replacement ......................................................... 5-9 selecting the right nozzle ...................................... 5-11 spray angles ........................................................ 5-7 spray droplets ...................................................... 5-5 spray patterns ...................................................... 5-5 thermal stability (coke) ......................................... 5-14 tools ..................................................................... 5-10, 7-19 viscosity .............................................................. 5-11 Ohms ............................................................................ 8-4, 10-12 Ohm’s Law ..................................................................... 8-7 Ohmmeter ...................................................................... 8-21, 8-22, 10-12 Oil Lines ......................................................................... 3-11 air in oil lines ........................................................ 4-14 filters ................................................................... 2-10, 3-11 frozen oil lines ...................................................... 2-8 leak test ............................................................... 4-15 leaks .................................................................... 4-17 noise .................................................................... 4-17 replacing .............................................................. 2-12 Oil Tanks and Piping ....................................................... 3-3 One Pipe System .......................................................... 4-6, 13-10, 13-16 Outdoor Air Infiltration .................................................... 16-10 Outside Air Kit ............................................................... 6-12 Overload Circuits ........................................................... 8-23 Overload/Thermal Switch ............................................... 10-6, 10-7 Panel Heating Systems ................................................. 13-12 Piston ............................................................................ 4-3, 4-5 Plenums ......................................................................... 13-5 Plug or Cap .................................................................... 3-11 Pour Point ...................................................................... 2-5 Power-Venting ................................................................ 6-15, 6-17, 6-18 Pressure Control Siphon Loop ........................................ 12-15 Pressure Control Wiring ................................................. 12-16 Pressure Reducing Valve ................................................ 13-13, 13-21 Pressure Relief Valve ..................................................... 13-13 Pressuretrol ................................................................... 12-14 Primary Air ..................................................................... 1-9 Primary Controls ............................................................ 11-3 Oilheat Technicians Manual—XVI


NORA Oilheat Technicians Manual
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