HVAC Players
Who is commonly called the "GC"?
What is general contractor?
What is the basic job of a boiler in a hydronic system?
What is to add heat to the water?
What does GPM stand for and what does it measure?
What is gallons per minute and flow rate?
What is the main purpose of an expansion tank?
What is to absorb water expansion as temperature changes?
What is the heat transfer medium used in hydronics?
What is water?
Who designs the building system and writes the plans and specifications?
What is engineer and architect?
What type of boiler can recover extra heat from flue gas?
What is condensing boiler?
What part of the pump adds energy to the water?
What is impeller?
What problem does a buffer tank help prevent?
What is short cycling?
What is the first law of thermodynamics?
What is energy cannot be created or destroyed?
Which group usually buys equipment from reps and submits bids to the GC?
What is trade contractor?
Name two fuel sources listed on the boiler slide.
What is propane, natural gas, or electric?
What is the difference between the suction side and discharge side of a pump?
What is water enters on suction and leaves on discharge at a higher pressure?
Why is air removal important in a hydronic system?
What is air can cause noise, poor heat transfer, and circulation problems?
How is pipe size typically determined?
What is by flow rate and considering pressure drops?
What is the main role of a manufacturer's representative?
What is to help select, support, and sell equipment to the contractor or engineer?
What condition helps a condensing boiler reach higher efficiency?
What is low return water temp or inlet water temp?
On a pump curve, where is the operating point?
What is at the intersection between the system curve and pump(impeller)curve?
What is the difference between a plain steel tank and a bladder/diaphragm tank?
What is bladder or diaphragm tank separates air from water; a plain steel tank does not?
What does VFD stand for and what does it do?
What is variable frequency drive and it modulates the frequency of the motor to adjust the speed which directly affects the flow of water?
Why is the manufacturer's rep important in a project workflow?
What is they connect the manufacturer, contractor, and engineer through selections, technical support, and equipment information?
Why do condensing boilers need different materials or venting than non-condensing boilers?
What is they produce acidic condensate that can corrode standard materials?
Why does a pump cavitate if NPSHa is lower than NPSHr?
What is because pressure at the pump inlet drops too low, causing vapor bubbles to form and collapse?
Where should air separators be placed in a system?
What is where air comes out of solution more easily at higher temperature and lower pressure?
What are the pump affinity laws?
What is
flow = speed
head = speed2
power = speed3
?