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20 Cards in this Set
- Front
- Back
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Purpose of a safe start check performed by the module? |
Ensures the module doesn’t sense a false flame |
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On a DP ignition, what happens after the module conducts a safe start check? |
The spark & main burner gas are turned on |
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Maximum high limit of a forced air conversion furnace? |
250 F 120 C |
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What does the ignition module activate when first energized? |
Ignition & pilot valve |
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What will a poor ground on the ignition module cause? |
No main flame |
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Max length of flex connectors on a vented & invented appliance? |
Vented = 2’ Invented = 6’ |
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Bury depth on residential & commercial gas lines? |
15” residential 24” commercial |
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When is a gas inspection point required? |
When more than 25’ of gas line is under concrete or pavement |
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What is the ROT to find minimum size of a chimney serving a single appliance? |
One size smaller than the vent connector |
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Maximum length of an air supply? |
20’. If longer than 20’ increase one size up to 50’ |
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Only damper allowed on a residential appliance? |
Thermal activated damper |
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What type of system regulators above .5psig? |
Positive shut off type |
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On a C3H8 2psi system how far is system regulator allowed inside building? |
3’ or 1m maximum |
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A corrugated metal connector shall not exceed 2’ in length when? |
Connecting a suspended appliance or a decorative appliance |
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The maximum range of a test gauge shall exceed test pressure by at least_____, but not more than _____? |
15% 300% |
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Power vents use 100% _____? |
Negative pressure |
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How far above a roof must a direct vent terminate? |
18” |
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What |
18” |
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Where is the draft regulator located when installed in conjunction with a power vent used on a cat. 1 appliance? |
In the vent connector where positive pressures will not occur |
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What is the purpose of a draft regulator on a power vent? |
Maintain atmospheric pressure & allow purging of vent |
