Under NAC 624.540(2)(c), which piping is within the Nevada C-37C Solar Air Conditioning scope?
Piping
Question · Easy
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Short
Which copper tube type is the usual choice for a pressurized glazed-collector loop that delivers 180–200°F fluid to a single-effect absorption generator?
Why must outdoor collector supply and return piping on a C-37C solar-hydronic cooling system be insulated?
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When copper collector-loop tubing is joined to a galvanized-steel tank fitting on a solar-cooling store, the 2018 UPC requires which fitting?
Per 2018 UPC Table 313.3, horizontal copper or copper-alloy tubing 1-1/2 inches and smaller in a solar-cooling collector loop shall be supported at intervals not exceeding:
OSHA fall heights, to scale
In a drainback solar-cooling collector loop, supply and return piping must be pitched so the collectors empty when the pump stops. The FSEC solar-manual practice slope is at least:
On chilled-water piping that carries evaporator water from a solar-driven absorption chiller to a cooling coil, where must the vapor retarder be placed?
Per 2018 UPC Table 313.3, horizontal PEX tubing 1 inch and smaller used as a chilled-water radiant-ceiling loop shall be supported at least every:
Question · Medium
Why is CPVC generally unacceptable as the outdoor glazed-collector loop that feeds a solar absorption chiller?
Which joining method is appropriate for Type L copper in a high-temperature solar-cooling collector loop?
Per 2018 UPC Section 312.6, water piping installed in an exterior wall or other location subject to freezing shall be:
Where copper or PEX hydronic tubing serving a solar-cooling system passes through wood studs or plates and is less than 1 inch from the nearest edge, the 2018 UPC requires:
Why is galvanized steel a poor material for a closed propylene-glycol collector loop serving an absorption-chiller generator?
A six-collector array feeding a solar-cooling storage tank is piped reverse-return. What is the purpose of that arrangement?
Per 2018 UPC Table 313.3, horizontal threaded or welded steel pipe 1 inch and larger used as a solar-cooling hydronic header shall be supported at intervals not exceeding:
A C-37C solar-hydronic cooling plant has a 190°F collector/generator loop and a 44°F chilled-water loop. Which material split is the usual, code-consistent choice?
On a closed, pressurized glycol collector loop that feeds a solar-cooling store (not drainback), automatic air vents belong:
A C-37C contractor runs buried copper from a ground-mounted collector field to an indoor absorption chiller. Besides freeze protection under UPC 312.6, the piping must also be:
An 80-foot straight Type L copper collector header serving a solar-cooling array is filled at 40°F and later stagnates at 240°F. Using the copper rule of about 1.1 inches of expansion per 100 feet per 100°F, how much length change must the piping absorb?
Question · Hard
A drainback return from a roof-mounted solar-cooling array to an indoor reservoir is 40 feet long. Using the FSEC 1/4-inch-per-foot minimum, how much continuous fall is required?
A straight 54-foot run of 3/4-inch horizontal Type L copper generator-loop header is supported at both ends. Using 2018 UPC Table 313.3 maximum spacing of 6 feet, what is the minimum number of supports along that run, including the two end supports?
A solar-hydronic cooling plant uses a 190°F collector loop to a LiBr generator and a 44°F chilled-water loop to air handlers. Why must those two circuits remain separate pipe systems?
Which statement matches the official C-37C scope in NAC 624.540?
System Design
How does Nevada C-37C differ from C-21E, even though both mention solar air-conditioning?
A homeowner wants glazed collectors that drive a solar absorption chiller and also unglazed collectors that heat the backyard pool. Under NAC 624.540, C-37C alone authorizes which portion?
Which installation is outside C-37C even if the customer calls it "solar air conditioning"?
PSI Candidate Information Bulletin 270 lists which reference as allowed in the C-37C exam center, and which two as study-only?
The official PSI C-37C examination has which format?
Which three solar-thermal conversion paths are the usual C-37C ways to control air temperature?
A single-effect lithium-bromide/water absorption chiller typically needs generator-supply water in which temperature band?
For a C-37C system intended mainly for summer cooling in Nevada, FSEC collector-tilt practice is to set the array at approximately:
A solar-thermal air-conditioning system for an occupied Nevada building must include which cooling backup?
The cooling COP of a typical single-effect LiBr-water absorption chiller is defined as evaporator cooling divided by generator heat. What value should a C-37C designer expect?
A double-effect LiBr absorption chiller is specified for a C-37C plant because its COP is near 1.2. What collector-loop temperature does that machine typically require?
Compared with a single-effect LiBr chiller, a silica-gel adsorption chiller used for solar air-conditioning typically:
A solar-regenerated solid-desiccant (silica-gel wheel) cooling system typically needs regeneration air or water at about:
Why is a solar-driven chilled-water radiant ceiling a good air-temperature-control match in much of Nevada?
A single-effect absorption chiller used for C-37C solar air-conditioning must reject heat from which two components?
What operating fault is the classic crystallization risk on a LiBr-water absorption chiller?
When would a C-37C designer choose an ammonia-water absorption machine instead of LiBr-water?
For a C-37C collector loop in Reno that must deliver 180°F water to an absorption generator, which freeze-protection pair is the usual FSEC-style choice?
Why does a solar-absorption cooling array need more collector area than a same-tonnage vapor-compression plant needs PV area, even in Nevada sun?
What is the usual storage architecture on a C-37C solar-hydronic absorption plant?
Why can a C-37C solar-cooling plant often claim a higher solar fraction than a C-37B winter space-heating plant of the same collector area?
In the northern hemisphere, FSEC orientation practice for a fixed summer-cooling collector array is to face:
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