Hydronics heating review
How much pressure exerted at the bottom of 28 inches tall column of water
1 psi
Secondary aquastat should be set
10° over primary no more than 210°F
A PRV is usually factory set to close my pressure rises to
12 psi
How much pressure is required to lift water 21 feet
13 pounds
The aquastat should be set to open at
180° to 200°F
Backflow preventer's should be installed on any boiler installed after
1974
How many circuits are use the controlled by the circulator really
2
What is required delta T
20°F plus or -5°
At work pressure does a relief valve open and a hot water boiler
30 psi
Static pressure is caused by
Gravity
Which type of thermostat is most commonly use for a boiler
Heating only thermostats
Feel pressure is determined by
Height of the system
Which device is used to protect the boiler against high pressure
I relied valve
Turning the adjustment screw of the PRV clockwise will
Increase fill pressure
What is a pump flange
It the connection point to the pump and the piping
Where is the best location to install the circulator
Just after the expansion tank
One possible disadvantage of work rotor circulator is
Limited capacity
What rotor circulator use water to lubricate the
Motor bearings
A spring coupler is used to connect the
Motor shaft to a pump oil shaft
What's the purpose of a circulator
Move water to the pipe
List for requirements when installing the tube and a relief valve
Must be routed to the floor, same size as the outlet of the relief, installed so it can't be capped, must be metal
There's a pump affect pressure at the point the expansion tank attaches to the system
No
What is the result of a waterlogged expansion tank
No room for expansion, system pressure rises, relief valve opens, water is let out, cold waters In
Air circulating through a hot water hydronic system causes
Noise
What type of circulator is a B&G 100
Oil lubricated
Where is the secondary aquastat installed
On supply line on the boiler, closest to boiler
Where can we find the direction of flow through the system
On the volute
When is it recommended to use an automatic air vent
On top of this air separator
Name two materials used to seal the threads of a pipe joint
Pipe dope, Teflon tape ( lubricants)
Which device allows water to feed into the boiler, if boiler pressure drops
Pressure reducing valve
What is the purpose of the expansion tank
Prevent water system pressure from water while heating
What is the purpose of the backflow preventer's
Protects potable water supply
What is the preferred method of testing a relief valve
Raise the system pressure at the relief set
What rotors circulator do not require
Regular maintenance
What should be done with her leaking relief valve
Replace it
Why should I to be installed from the relief valve outlet
Route the water to a safe discharge location
What device is used as a back up to the aquastat
Secondary aquastat
The diaphragm expansion tank uses a flexable membrane to
Separate the air in the water
Secondary Auquastat are
Surface mounted switches
What device can be Connected to an air cushion thing to prevent recirculation of cool air saturated water to the system
Tank fittings
What component of the circulator move the water
The impeller
What pulls water into the eye
The impeller
What causes a pressure reducing valve to close
The rise and pressure
Air pressure in the diaphragm tank should be the same as
The system pressure
If delta T is low this indicates that the rate of water flow is
To fast
Why is it important to keep the system pressure higher
To keep air bubble small to move through water improves air separator
And if this cannot be done the valve shall be tested by the means of
Try lever
What is the purpose of the van and some backflow preventer's
Vents water out of the boiler
What type of circulator is a taco 007
Water lubricated pump
If air is not returned to the tank it will become
Waterlogged
Which type of circulator is physically larger
What lubricant
There should be no water pressure on the diaphragm when
When checking air pressure
When is it recommended to use an automatic air vent
Whenever a diaphragm tank is in use
What type of soldier is used primarily for copper tubing
95%/5% lead free
Define pump head
Ability to overcome friction and move the water
Coach says there shall be no...
Accumulation of rice to prevent the operation of the valve
Installing the tank on the suction side of the circulator ensures that the circulator pressure will be
Added to the static feel pressure
What is the advantage of pumping away
Air bubbles are smaller
Which expansion tank is the oldest type, has the water and air in direct contact, and will allow the air in the team to be dissolved by water
Air cushion
Name two types Of expansion tanks
Air cushion and diaphragm
Name to come in terms of circulators used in hydronic heating systems
Air lubricant, water lubricant (wet water pumps)
What device can be used to return air to an air cushion tank
Air separator
Where is the QuickFill bypass installed
And fill line around PRV
What device controls the maximum temperature of the water in a hot water boiler
Aquastat
Where should manual air vent to be installed
At the radiator highest point
What device should always used on a system with a diaphragm from tank
Automatic air vent
What is the first device that should be installed in the fill line
Backflow preventer
Name three parts found in the fill line
Backflow preventer's, pressure reducing valve and QuickFill bypass
Which Of the three parts In the fill line is required by code
Backflow preventer, PRV, missing third
Which part of an oil lubricated a circulator contains the bearings, seals and pump shaft
Bearing assembly
Static pressure in a hydronic system as greatest at the
Bottom of the system
What is the purpose of the quick fill bypass
Bypass pressure reducing valve
How do we find the required G.P.M.for a hot water system
Checking the Delta T
A backflow preventer must be installed on any system that contains
Chemicals
Name two loads that may be controlled by the thermostat
Circular really coil/ zone valve motor
The contacts of a circulator really are
Circulator
Aquastat can fail
Closed
What does the code book say Shall be done to relief valve
test it
Which type of flux should be used
Copper clean, help solder seal joint
Worn sagging motor mounts could cause
Cupler failure
Normally what type of realtors use as a circulator really
Double pole single throw with a 24 V coil
What is Portible water
Drinking water
What is meant by the term drive fired
Energize in the system with no water
Where is the point of no pressure change
Expansion tank meets the system
Why do most residential die from tanks company charged at 12 psi G
Factory set and bladder things are set together to work
How do we find the required pump head for a hot water system
Find long as loop of pipe then times it by .06
What is meant by G.P.M.
Gallons per minute
What must be done before soldier in copper tubing
The bird, clean Plumber sanding cloth,fluxed