Nate Certification

(NATE)

North American Technician Excellence, Inc. is
committed to improving the HVACR industry through voluntary testing and
certification.

heat pump (C)

heats or cools the home by moving heat. During the winter, it
brings heat from outdoor air inside. Even when it is cold outside, there is still
some heat in the air.

the gas furnace (F) or air handler (B)

then heats
the air from the return ducts (I)

The electrical panel (A)

is located on an
interior wall and controls the electrical current within the
system.

The disconnect (E)

is a safety
feature that makes sure the electrical circuit is de-energized for service and
maintenance of the system. This also prevents injury to the technician.

Open-ended wrenches

have a U-
shaped opening to grip the face of a bolt or nut.

Adjustable wrenches

are helpful
because they can do the work of
several different wrenches. They are
used on pipes, screws, nuts, and bolts.

Box end wrench

have an enclosed opening
to grip the face of a bolt or nut. They can be
used in narrow spaces or on long studs.
Figure 2-3, a ratchet-type box wrench, is a
specific type of box-end wrench

Cordless drill

used to access equipment in HVAC systems

Claw Hammer

are hand tools used in carpentry and electrical work and can easily reach into tight areas

Nut drivers

can tighten and loosen hex headed screwdrivers screws, bolts, and nuts

Hex Keys

are used to tighten and loosen fastners, sockets, bolts, and set screws. They are designed to do not slip and strip a socket.

Pump pliers

are adjustable and made to grip and turn rigid pipe fittings

Linesman Pliers

are used to grip, bend, twist, and cut electrical wire and cable.

Wire Strippers

are used to cut the plastic coating around the wire without cutting the wire core

Aviation snips

are used to cut sheet metal when installing or repairing duct work

Tubing benders

are used to cleanly bend tubes made from soft copper so that they can fit around the corners.

Deburring tools

used to remove any rough edges inside the tubing

Swagging tool

used one bell one end of soft copper tubing so that can be joined another section of tubing

Flaring tool

used one end of soft copper so that the tubing can be attached to the brass or steel type fitting

Class A

ordinary fire when wood paper or textile burning. Water should be used on these. Class A fire extinguisher should not be used on Class B and Class C bc fire spread flammable liquid in B and shock with Class C fire.

Class B

fire that contain flammable liquid such as oil, grease, paint varnish or other chemicals. A smothering agent foam is required. A fire extinguisher Class B classification will deal with fire.

Class C

electrical fire. A nonconducting agent such as carbon dioxide required for this fire. Class C fire extinguishers work on Class B not work on Class A fire.

Carbon dioxide

is used to fight electrical fires because it does not conduct electricity. Also least likely to damage equipment

Material Safety Data Sheet

for each chemical to obtain information on proper use, safety precuations, personal protective equipment, and emergency procedures

Ladder Safety

All portable ladders must have nonslip bases . Rubber feet safety so that they are flat on the ground from slipping. Set ladders set up firm level surface. Use mud sill on soft soil. If one leg sink into soft ground, the ladder can fall sideway. Make sure the base of the ladder is at distance from the wall equal to ¼ of working height of ladder. Working height of ladder is 16 ft the base should be 4 feet away from the wall.

grounded

mean the one conductor of the circuit is connected to the ground

hot or live

in any point of the electrical system not connected to the ground

Circuit Safety

electric shock, burns, blast, related accidents

Electrical Panel

Air handler

Heat pump

Thermostat

Disconnect

Gas furnace

Condensing unit

return duct