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