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31 Cards in this Set
- Front
- Back
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what is the minimum service clearance to the control side of a boiler |
24" |
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a condensing appliance will generally have a vent temp no more than |
125°f |
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min length of a hose permitted for a construction heater is |
15' |
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flame rectification relies on what of the flame |
conductivity |
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typical spark ignition voltage for IPi system would be |
10-30 KV ac |
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on a flame safe guard system using a flame rectification the rectified signal is generally the range of |
1-10 micro amps |
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minimum spark gap on ipi system |
1/8" |
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which requires the highest voltage to operate |
spark gap |
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the VA rating on a transformer indicates what |
the capacity rating |
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if the high limit is installed on the ordinary voltage what does it control |
transformer |
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what would you use to test the integrity of the valve coil |
ohm meter |
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high limit on forced air furnace is set between what range |
180-250 °f |
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the fame control on a forced air furnace is generally set at |
130°f cut in 90°f cut out |
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how is a mercury thermostat installed |
4-5 feet above the floor installed level |
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what is used to properly adjust the anticipatory |
the amperage reading from the control circuit |
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when over 400mbh power burners are size as |
1 sq " per 30.000 btu |
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excess air volume are accurately measured at |
in the flue gases of the heat exchanger |
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what is the smallest vent allowed in the venting system |
3" |
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the valve that must be on all propane cylinders is |
relief valve |
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ipi system ground strap is how many times larger than the ignitor and what power is it |
4 times larger than ignitor and it produces DC voltages conducted through flame |
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min spark jump and what's solution if minimum not reached |
1/4-3/8 if doesnt reach minimum module must be replaced transformer not interchangeable |
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pressure rating for propane cylinder |
240 psig |
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how often does a cylinder need to be recertified |
every 10 years |
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relief valve if a cylinder must be in contact with what |
must be in contact with the vapour space of a cylinder at all times |
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min distance if discharge if propane relief valve and mechanical air intake of a building |
10 ft |
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propane internal relief valve set at what? |
375 psig |
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what size is spit valve orfice |
54 |
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cylinder can be filled to a max of what |
water capacity 42% liquid level gauge 80% |
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max hose length for propane appliances |
30 feet |
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average 100lb porpqne cylinder will supply how much btuh |
50,000 btuh |
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how far must a vaporizer be from a building air intake or opening |
25 ft |
