Hunter Fan 44100 User Manual

OwnerÕs Manual

®

44100

SINCE 1 8 8 6

Other Quality Products from Hunter

Fans

Air Purifiers

Humidifiers

We are pleased you have selected one of our broad line of home comfort products. Our
products are manufactured to high quality standards and are designed for years of service.

We hope you will be satisfied and thank you for buying a Hunter product.

Table Of Contents

Installation

Operation

Features 6
Remove Old Thermostat 8
Labeling Wires 10
System Selector Switches 14
Connecting Wires and Mounting Thermostat 14

Programming/Setting Clock 16
Personal Program Schedule 20
Reviewing Program Settings 24
Manual Overide 25
Filter Monitor 28
Temperature Span 29
Trouble Shooting Guide 30
Typical Wiring Diagrams 32

Read This Before Installing Thermostat

IMPORTANT

1

Read the entire installation section of this
Owner’s Manual thoroughly before you begin to

install or operate your Hunter Thermostat.

• Remove the mylar label from the display
window.

INSTALLATION

2

All installation is normally performed at your
thermostat.

PROGRAMMING

3

You can practice programming before

installing your thermostat by inserting and
connecting the batteries and following the
instructions on page 14. This can be done while
you relax in your favorite chair and is a very
good way to familiarize yourself with all the
functions of your Hunter Thermostat.

OPERATION

4

Your Hunter Thermostat is designed to

operate with most gas, oil, electric or 2-wire
hot water heating, and air conditioning systems

that have 24-volt or millivolt control.
This Hunter Thermostat will not control multi-

stage heating or cooling systems, 110/220 V
systems, or 3 wire zone systems.

COMPRESSOR PROTECTION

5

The thermostat provides a 4-minute delay

after shutting off the compressor before it
can be restarted. This feature will prevent
damage to your air conditioner compressor
caused by rapid cycling. It does not provide a
delay when there are power outages.

TEMPERATURE RANGE

6

Your thermostat can be programmed between

40°F and 95°F (5°C and 35°C). However, it will
display room temperatures from 32°F to 99°F (0°C
to 37°C).

POWER FAILURE

7

Whenever the main power is interrupted or

fails, the battery power retains the programs
and current time.

This thermostat is designed to optimize the use of your heating and cooling equipment. It does
this by matching your comfort (the temperatures in your home) to your schedule.

An example:

6am – You wake up. Program 1 has the heat set to 70° (21°C).

7:30am – You leave for work. The second program turns the heat back to 62° (17°C)

while you are away.

5:00pm – You come home. The third program has already warmed your house back

to 70° (21°C).

10:00pm – You go to bed. A half hour later, program 4 turns the heat back to 64° (18°C)

to save energy while you are under the blankets.

How This Thermostat Works…And Saves You Money

BATTERY WARNING

8

When the batteries are low, “LOW BATT”

indicator on the display will flash. When this
happens, install new batteries immediately.
Once the “LOW BATT” indicator appears, the
thermostat will continue to operate for
approximately 30 days. (Only alkaline batteries
should be used in your thermostat. Rechargeable
batteries have different properties which may
cause the thermostat to not operate properly. Do
not use old batteries.) The batteries should last
one year.

CAUTION: The batteries are the only source
of power used to operate your system. If you
do not replace the batteries, the display will
dim and your heating and cooling system will
stop operation.

NOTE: If you plan to be away from the premises

over 30 days, we recommend that you replace
the old batteries with new alkaline batteries prior
to leaving.

6-7

Features

Manual switch for
turning on heating and
cooling system.

Manual switch for
automatic or continuous
fan operation.

Battery door for easy access

Soft touch programming
buttons (see below)

Display shows time, day, temperature, program number,
hold, usage and low battery indicator.

Reset button for resetting computer back to
12:00 A.M. and clearing all programs.

Individual
pushbuttons for
raising or lowering
temperature settings.

M T W TH F SA SU

SET TEMP HOLD TEMP

88:88 88

c

AM
PM

HEAT COOL

1234

FILTER

LO BAT

Changes the clock
into 12 or 24 hour
(military) mode.

For entering minute of day.

For revising
and changing
weekday or
weekend
programs

To reset filter
counter back
to zero.

Returns
display to
current
time and
temperature.

Automatically
programs the
thermostat for
weekday and
weekend
program
settings.

For entering day of week.

Provides
permanent
temperature
setting by
overriding
stored
programs.
Also, clears
manual
override and
returns to
current
program
settings.

For entering hour
of day.

MIN

AUTO

PROGRAM

HOUR

PROG

DAY

HOLD

CLEAR

12/24 HRS RETURN

FILTER

RESET

This thermostat comes with two #8 slotted screws and two wall anchors for mounting. To
install your unit, you should have the following tools and materials.

■ Slotted screwdriver ■ Electric drill and 3/16" bit

■ Hammer ■ Two 1.5 V (AA) Size Alkaline batteries

CAUTION: Do not remove any wiring from existing thermostat before reading the
instructions carefully. Wires must be labeled prior to removal.

■

TYPICAL HOME THERMOSTATS

FIGURE 1

Wall Mounting Plate Thermostat Cover

Wall Mounting Plate Thermostat Cover

■ Each wire coming from the wall to the existing thermostat is connected to a terminal point on
that thermostat. Each of these terminal points is usually marked with a code letter as shown in
Table A on page 11.

■ The number of wires in your system can be as few as two (for heat only systems), as many as

eight, or any number in between. If you follow the labeling procedures correctly, you do not
have to be concerned about how many wires there are.

■ There is often no terminal marking on the existing thermostat of two wire, heat only systems.

Do not worry, just connect either of the wires to the RH terminal, then connect the other wire to
the W terminal to complete the circuit.

■ IMPORTANT! BEFORE DISCONNECTING

ANY WIRES, APPLYTHE SELF-ADHESIVE
LABELS PROVIDED TO THE WIRE AS SHOWN IN TABLE A ON PAGE 11. (For example,
attach the label marked W to the wire which goes to the W or H terminal on your existing
thermostat.) IGNORE

THE COLOR OF

THE WIRES since

these do not always comply with the standard.

■After labeling wires, disconnect them from the existing
thermostat terminals.

■ Remove existing wallplate. To make sure wires do not fall back
into wall opening, you may want to tape them to the wall.

■ If hole in wall is larger than necessary for wires, seal this hole
so that no hot or cold air can enter the back of the thermostat
from the wall. This air could cause a false thermostat reading.

10-11

Installation

Wire Labeling

RH

G

12-13

Installation

NOTE: If your thermostat has one wire marked R or RH (4-wire system), then leave
the jumper wire between the RH and RC terminals. Otherwise, if you have separate
RH and RC wires (5-wire system), then remove the jumper wire between the RH and
RC terminals.

NOTE: Do not connect a “Common” wire (sometimes labelled “C”) to any terminal on
this thermostat. Tape up the wire and do not use. This wire provides electricity to non­battery powered thermostats.

Wire Labeling

Snap open the wallplate from your thermostat by pressing the release tab on the bottom of
the thermostat.

Position wallplate on wall and pull existing wires through large opening. Then level for
appearance. Mark holes for plastic anchors provided if existing holes do not line up with
Hunter Thermostat holes.

Drill holes with 3/16" bit and gently tap anchors into the holes until flush with wall.
Reposition wallplate to wall, pulling wires through large opening. Insert mounting screws

provided into wall anchor and tighten. (See Figure 2.)

Mount Wallplate and Thermostat

Figure 2

The heating system selector and the F°/C° selector switches are located on the Printed Circuit
Board.

■ Heating system selector

The heating system selector is a switch on the Printed Circuit Board on the inside of the
thermostat. The switch is at “HG” position. Leave it in this position if you have a gas
furnace or an oil burner.

If you have an electric furnace, test to see whether the heat and fan come on as expected.
Leave the switch in the “HG” position. If the fan does not come on when the thermostat
calls for heat, change the switch position to “HE.”

The system selector has no effect in the cooling mode.

NOTE: “HG” position is for gas and most other systems. “HE” position is for certain
electric systems having a fan relay.

■ F°/C° selector (Fahrenheit/Centigrade)

Your thermostat is set for F° mode from the factory. In order to
change to C° mode, slide the switch to C° and press reset button
on the front of the thermostat with a paper clip. The reset button
is located near the display.

NOTE: Unless reset button is pressed, the thermostat will
not change the mode.

14-15

Installation

Selector Switches

Connect Wires and Mount Thermostat Cover to Wall Plate

■ Match and connect the labeled wires to the appropriate coded terminal screws on the
mounting plate. (See Figure 3, 4.) Ignore any wires which may be present, but which were
not connected to the old thermostat.

HG

HE

C F

FIGURE 3

FIGURE 4

W

RC RH

YG

■ Be sure to tighten the terminal screws securely, otherwise a loose wire could cause operational
problems with your system or thermostat.

■ Push excess wire back into hole to prevent interference with mounting of the thermostat cover.

■ Make sure the Function Switch is set at OFF, and the FAN-AUTO Switch is in AUTO.

■ Insert the bottom tab on the thermostat body into the slot at the bottom of the wallplate.

Press top of the thermostat body to snap it into the wallplate. (NOTE: Do not force the
thermostat onto the wallplate, as the terminal pins may be damaged. If it does not
snap properly, the thermostat may not work.)

■ Insert the two AA size batteries, observing the

polarity marked on the unit.

■ Switch on the main power. Press the reset button.

(See Figure 5.)

■ The LCD display indicates the current room

temperature of your house. If it shows random
numbers or partial digits, press the reset button
once again.

■ The installation is now complete. Continue reading

Owner’s Manual for complete operating instructions.

Programming

1

Remove mylar label covering display
window.

2

When the heating or cooling system is
actually operating, “HEAT” or “COOL” will

appear on the display.

3

If power is interrupted the batteries will
keep all programs.

4

If “LOW BATT” indicator appears on the
display replace the batteries.

Setting the Time and Day of Week

When you first install the two AAbatteries, the thermostat automatically sets the day and time
to Monday, 12:00 a.m., shows the current room temperature and is programmed for 68° in
heat mode and 78° in cool mode. Press the reset button after installing new batteries.

The first data you should enter is the current time and day of week. As the keys are pressed,
the display will show the data being entered.

■ Initial read-out after pressing
reset button.

■ Current room temperature is 72°.

■ No indication of program number.

M T W TH F SA SU

SET TEMP HOLD TEMP

I2:00 72

c

AM

PM

HEAT COOL

1234

FILTER

LO BAT

■ Press once. Temperature digits
disappear, show time set mode.

HOUR

M T W TH F SA SU

SET TEMP HOLD TEMP

I2:00 72

c

AM

PM

HEAT COOL

1234

FILTER

LO BAT

EXAMPLE:

If the unit is
being
installed at
9:15 p.m.,
Saturday, to
set the
thermostat,
you would
press the
keys in the
shown
sequence.

16-17

■ Press and hold until current hour
appears on display.

■ Note the AM/PM indicator.

■ Press and hold until current

minutes appear on display.

■ Press until current day appears
on display.

■ Returns to normal time and
temperature.

■ If return is not pressed it will return
automatically in 10 seconds.

HOUR

MIN

DAY

RETURN

M T W TH F SA SU

SET TEMP HOLD TEMP

I 9:00 72

c

AM

PM

HEAT COOL

1234

FILTER

LO BAT

M T W TH F SA SU

SET TEMP HOLD TEMP

I 9:I5 72

c

AM

PM

HEAT COOL

1234

FILTER

LO BAT

M T W TH F SA SU

SET TEMP HOLD TEMP

I 9:I5 72

c

AM

PM

HEAT COOL

1234

FILTER

LO BAT

M T W TH F SA SU

SET TEMP HOLD TEMP

I 9:I5 72

c

AM

PM

HEAT COOL

1234

FILTER

LO BAT

Programming

Studies conducted by the Department of
Energy estimate that setting your thermostat
back 10°F for two 8-hour periods during
winter can reduce your fuel bill by as much
as 30%. By setting your thermostat up 5° for
two 8-hour periods during summer you can
reduce your fuel bill up to 25%.

Your thermostat is capable of holding up to 4
separate programs for heat or cool for
weekdays and 4 seperate programs for each
weekend day.

A typical set of programs is shown in Table 1.

Weekday Program (Mon. – Fri.)

Weekday

Winter

Program 1 6:00AM 69°F (21°C)

Weekday

Winter

Program 2 8:30AM 60°F (16°C)

Weekday

Winter

Program 3 3:00PM 68°F (20°C)

Weekday

Winter

Program 4 11:00PM 58°F (14°C)

TABLE 1

Typical Suggested Summer
and Winter Programs for Maximum Savings

18-19

NOTE: The thermostat program will NOT
take effect immediately after
programming of your thermostat but at
the next programmed time/temperature
change. The thermostat is pre-set to 68°F
(20°C) for heat and 78°F (25°C) for air
conditioning. So if you want a
temperature other than 68°F or 78°F (20°C
or 25°C) right away, use the temporary
manual override feature (described on
page 26) to enter your desired
temperature setting.

When your program becomes effective at the
next time/temperature setting, the
appropriate corresponding program number
will appear on the display.

Weekend Program (Sat – Sun)

Weekday

Winter

Program 1 7:00AM 69°F (21°C)

Weekend

Winter

Program 2 6:00PM 65°F (18°C)

Weekend

Winter

Program 3 8:00PM 68°F (20°C)

Weekend

Winter

Program 4 11:00PM 58°F (14°C)

Programming

Before programming or changing the program,
use this Personal Program Schedule to
determine which times and temperature
settings will best satisfy both your comfort and
energy saving requirements.

Use a pencil so you can revise your records
each time you change your temperature
settings.

Personal Program Schedule

FOR WINTER FOR SUMMER

PROGRAM WAKE LEAVE RETURN SLEEP
NUMBER 1 2 3 4

MON. TIME TIME TIME TIME
thru

FRI. TEMP TEMP TEMP TEMP

SAT. TIME TIME TIME TIME
and

SUN. TEMP TEMP TEMP TEMP

PROGRAM WAKE LEAVE RETURN SLEEP
NUMBER 1 2 3 4

MON. TIME TIME TIME TIME
thru

FRI. TEMP TEMP TEMP TEMP

SAT. TIME TIME TIME TIME
and

SUN. TEMP TEMP TEMP TEMP

20-21

Your thermostat can be programmed in two
different ways.

1. Autoprogram method

2. Manual method
Before programming, position the

Heat/Off/Cool selector to the mode to be
programmed.

Autoprogram method

In autoprogram method, you can program
your thermostat instantly for the entire week
by simply pressing “Auto Prog.” key once.
When this key is pressed, standard program
gets activated and your thermostat is
programmed automatically. The standard
program is shown in table 3.

If you wish to change this program to suit
your life style, you can do so by changing the
time and the temperatures of those programs
which you want to be different than standard
programs. The method is explained in the
manual method of programming.

Press
Your thermostat will be programmed

automatically according to Table 3

(If the slide switch is in the heat mode, only
heat program is effective. In order to activate
cool program, slide the switch to cool mode
and press “Auto Prog.”)

Manual method

In this method, each program is inserted
according to your personal programming
schedule.

When the battery is first inserted, the
thermostat is programmed for 68°F (20°C) in
heat mode and 78°F (25°C) in cool mode.

NOTE: There are no energy saving time or
temperature settings.

Familiarize yourself with manual program­ming. The following example demonstrates
the manual programming method. You can
program or change the program of weekdays
and weekends.

Programming Your Thermostat

PROGRAM
NUMBER TIME TEMP IN F° (C°)

HEAT COOL

1 5:00AM 68 (20) 78 (25)
2 7:00AM 60 (15) 85 (29)
3 3:00PM 68 (20) 78 (25)
4 10:00PM 62 (16) 82 (27)

AUTO
PROG

TABLE 3

Programming

Weekday
Programs

Step 1

Step 2

■ Normal display of time, temper­ature, and day of the week.

■ Program indicator (1) is displayed.

■ 68°F is displayed.

■ 0:00 space for time is displayed.

■ M to F is displayed.

PROG

M T W TH F SA SU

SET TEMP HOLD TEMP

8 9:15 72

c

AM

PM

HEAT COOL

1234

FILTER

LO BAT

M T W TH F SA SU

SET TEMP HOLD TEMP

80:00 68

c

AM
PM

HEAT COOL

1234

FILTER

LO BAT

■ Press and hold until 6:00 is
displayed.

■ Weekday Program 1 is complete.

■ Note AM/PM

HOUR

M T W TH F SA SU

SET TEMP HOLD TEMP

86:00 68

c

AM

PM

HEAT COOL

1234

FILTER

LO BAT

NOTE: 1) The program time is set in

increments of 15 minutes.

2) The program temperature is
set in increments of 1°F.

Programming Your Thermostat (Continued)

22-23

Press Display Reads

Step 3

Continue
for
Weekend
Programs

■ Press on once to change
temperature to 69°F.

■ Weekday program 1 is complete.

■ Press PROG to move to program

2, 3, and 4 and follow the same
steps

Press to move to

weekend programs. Weekends can
be programmed with one schedule,
or different schedules for Saturday
and Sunday.

M T W TH F SA SU

SET TEMP HOLD TEMP

86:00 69

c

AM

PM

HEAT COOL

1234

FILTER

LO BAT

Use to insert or change time and

temperatures of other programs.

HOUR MIN

PROG

PROG

HOUR

MIN

PROG

M T W TH F SA SU

SET TEMP HOLD TEMP

10:00 68

c

AM
PM

HEAT COOL

1234

FILTER

LO BAT

Similar to weekday programming.

NOTE: If program time remains 0:00, that particular program will not be effective; e.g., if
Program #2 has time 0:00, the thermostat will jump from Program #1 to Program #3.

to insert weekend programs.

Press Display Reads

Programming

Weekday
Program

■ Normal display of current time,
temperature, and day of week.

■ 1st weekday program is displayed.

■ Program indicator (1) appears.

■ M to F indication appears.

PROG

PROG

M T W TH F SA SU

SET TEMP HOLD TEMP

8 9:15 72

c

AM

PM

HEAT COOL

1234

FILTER

LO BAT

M T W TH F SA SU

SET TEMP HOLD TEMP

86:00 68

c

AM

PM

HEAT COOL

1234

FILTER

LO BAT

Reviewing Programs

You may want to review the programs to see that the settings are compatible with your lifestyle.

Continue pressing to review programs.

NOTE: The temperatures you have
entered will NOT take effect immediately,
but at the next program time change. The
Thermostat is preset to 68°F in heat mode
and 78°F in cool mode.

If you want a temperature other than 68°F
or 78°F right away, you must use the
manual override feature described below
to enter the temperature you want.

When your entered program becomes
effective, the corresponding program
number will appear on the display.

After programming, confirm
the new programs by pressing

PROG

24-25

To Review The Current Temperature Setting:

Press
for 2
seconds
or less:

or

■ Current time and temperature

M T W TH F SA SU

SET TEMP HOLD TEMP

89:15 68

c

AM

PM

HEAT COOL

12 34

FILTER

LO BAT

■ 70 indicates the current setting of

the thermostat is 70°F. 68 shows
the present room temperature as
68°F.

■ If held for more than 2 seconds,

you will manually override your
present temperature to a new
setting as explained below.

M T W TH F SA SU

SET TEMP HOLD TEMP

86:70 68

c

AM
PM

HEAT COOL

12 34

FILTER

LO BAT

If You Want to Change the Temperature Without Affecting
Your Program:

Press and hold
to raise
temperature.

The new temperature will hold until the next program time is reached.

Press and hold
to lower
temperature.

Temporary Manual Override of Program

Programming

■ Press arrow to display current

set and room temperatures.

M T W TH F SA SU

89:68 60

c

AM
PM

HEAT COOL

12 34

FILTER

LO BAT

M T W TH F SA SU

SET TEMP HOLD TEMP

89:70 60

c

AM
PM

HEAT COOL

1234

FILTER

LO BAT

Temporary Manual Override

In the following example, the present room temperature is 60°F and we want to raise the
temperature to 70°F temporarily until the next program.

■ Continue pressing arrow. After 2

seconds, the set temperature
digits will blink and begin to
increase until the button is
released at the desired setting (in
this case 70°F).

■ Program number flashes.

■ Press return or in 10 seconds it

will return to showing current
time and temperature.

SET TEMP HOLD TEMP

■ To display a manual override setting, press
either arrow for less than 2 seconds.

■ When arrow is released, the display will
show current time and temperature.

■ Your thermostat is now in manual override
mode at 70°F until the next program
starts. Indicator number flashes until the
next program time comes into effect.

26-27

In the event you wish to hold your manual
override for vacation or an extended
period of time, follow the temporary manual
override instructions on
page 26, then immediately
press HOLD/CLEAR.

This will maintain override
setting indefinitely. “HOLD” will
appear on the display.

■ To return immediately to the
current program, press
HOLD/CLEAR until program
number appears. “HOLD” will
disappear if you were in
permanent manual override.

(*From temporary or permanent manual
override state)

NOTE: You can also return to the current
program by pressing “HOLD TEMP” once
in permanent override mode.

M T W TH F SA SU

SET TEMP HOLD TEMP

89:55 72

c

AM
PM

HEAT COOL

1234

FILTER

LO BAT

M T W TH F SA SU

SET TEMP HOLD TEMP

89:15 55

c

AM

PM

HEAT COOL

12 34

FILTER

LO BAT

HOLD

CLEAR

HOLD

CLEAR

Permanent Manual Override

HOLD

CLEAR

HOLD

CLEAR

To Return To Program*

Programming Your Thermostat (Continued)

Operations

72

.

7I

.

70

.

Filter Monitor

To Reset the Filter Counter to Zero

■ Filter indicator disappears.

M T W TH F SA SU

SET TEMP HOLD TEMP

86:30 68

c

AM

PM

HEAT COOL

1234

FILTER

LO BAT

M T W TH F SA SU

SET TEMP HOLD TEMP

86:30 68

c

AM

PM

HEAT COOL

1234

FILTER

LO BAT

FILTER
RESET

28-29

The CTC Programmable Thermostat measures and stores the amount of time the heating or
air conditioning system operated.

After 500 hours of usage, the word “FILTER” will appear and flash on the display, reminding
you to check or replace your system filter.

NOTE: “FILTER RESET” button works only when “FILTER” is displayed on the display. If
“RESET” button is pressed when “FILTER” is not displayed, the inter nal counter will not
reset.

Press

Other Features

Your thermostat is preprogrammed at the
factory to cycle when the temperature rises
1° above or 1° below the temperature setting
to provide maximum comfort. It cannot be
changed.

Temperature Span

Troubleshooting

Problem Solution

SCRAMBLED OR DOUBLE DISPLAY
(numbers over numbers)

NO DISPLAY

ENTIRE DISPLAY DIMS
PROGRAM DOES NOT CHANGE AT YOUR

DESIRED SETTING

AUTO/FAN DOES NOT COME ON

1. Remove clear mylar sticker.

1. Check battery connections and batteries.

2. Press reset button once with a small pin
and hold in for two seconds.

1. Replace batteries.

1. Check that time is set properly to “AM”
or “PM.”

2. Check that thermostat is not in "HOLD"
mode.

3. Check for correct day setting.

1. Move HG/HE system selector to opposite
position.

30-31

Problem (Continued) Solution (Continued)

If you experience any other problems, call 1-901-745-9222 from 8AM to 5PM Central
Standard time for technical assistance.

1. Check that function switch is in correct
position (“HEAT” or “COOL”).

2. There may be as much as 20 seconds
delay in the thermostat turning the system
on - wait and check.

3. Check your circuit breakers and switches
to ensure there is power to the system.

4. Replace batteries.

5. Make sure your furnace blower door is
closed properly.

6. If your system only uses 4 wires, be sure
the jumper wire is installed between the
RC and RH terminals.

1. Press the reset button once with a small
pin and hold in for two seconds. Then
reprogram.

1. Replace unit.

1. Replace unit.

HEATING OR COOLING DOES NOT GO
ON OR OFF

ERRATIC DISPLAY

IF UNIT CONTINUES TO OPERATE IN OFF
POSITION

THERMOSTAT READS , HI, LO
PERMANENTLY

Wiring Diagrams

32

4-wire Heat/Cool System

5-wire Heat/Cool System

THERMOSTAT

G

W

Y

RHRC

Heat Relay
or Valve

Heat/Cool
Transformer

Fan
Relay

Cool
Contactor

Jumper

THERMOSTAT

G

W

Y

RHRC

Heat Relay
or Valve

Heat
Transformer

Fan
Relay

Cool
Contactor

Cool
Transformer

2-wire Heat Only

3-wire Cool Only

3-wire Heat Only

THERMOSTAT

G

W

Y

RHRC

Heat Relay
or Valve

Heat
Transformer

THERMOSTAT

G

W

Y

RHRC

Heat Relay
or Valve

Heat
Transformer

Fan
Relay

THERMOSTAT

G

W

Y

RHRC

Cool
Contactor

Fan
Relay

Cool
Transformer