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22 Cards in this Set
- Front
- Back
Who's recommendations should be followed prior to start up? |
Boiler manufacturer |
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Which section of manual covers the dist the boiler is to be from combustible mat. |
Pre-installation |
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After completing water piping installer should |
Flush piping to remove impurities |
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What standard must be followed when venting flue gases from boiler |
Authority having jurisdiction |
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What can happen if system isn't properly filled |
Air gets trapped in system |
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What is 1st step in servicing a boiler venting and main burner |
Turn off electrical and gas supplies |
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What is best way to clean main burner |
Vacuum and sod brush |
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When techs perform continuity tests, they are checking for |
Opened or closed set of contacts |
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What type of Tstat is used on hydronic system |
T stat without heat anticipator |
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Loose wire on an aquastat may |
Prevent main burner from firing |
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Main function of LWCO on hit water heating boiler |
Prevent boiler main burner from starting when there low water |
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How to test float type LWCO |
Isolate and drain the LWCO so main burner will shut down |
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What should be done if you test a 24 VAC transformer and obtain a reading of zero |
Test supply power for transformer |
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What may untreated water cause in hydronic system |
Ferrous materials to oxidize |
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Spill switch is for |
Products of combustion spilling out from draft hood |
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Main function of zone valve |
To start and stop flow to a circuit |
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What must be done when zone valve drive motor fails |
Replace drive motor |
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What will happen to condensing boiler when return temp is too low |
Unnecessary damage and boiler failure |
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What should be completed after service call? |
Proper service and maintenance log |
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Step 1. Close the _____ to all _____ to the radiant floor heating system |
Isolation valves, zones and circuits |
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2. Connect a ____ to a _____ on the boiler or on the manifold supplying zone. |
Hose, hose bibb |
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3. Open ____ or _____ to the boiler and system |
Fill valve, water make up |