thermostat timer
Programmable timer
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Override thermostat using programmable timer

Thermostat timer

Override thermostat?
Add more programs to control furnace?

I cannot say exactly which HVAC or thermostat wires you connect this to.
The wire does not need power, or it can have 12-24-28 AC/DC max 2-4 amp/  or 120, 208, 240, 277 volt AC.max 12 amp.
You can simply cut a control wire, and insert ST01 as shown.

Timer red wire is capped.
If you connect timer red and blue wires, then timer programming is reversed...
THIS means what?
ST01 is programmable, or dusk-dawn timer.
Choose up to 6 on-off programs, or choose dusk-dawn. (either-or, not both)

Dusk-dawn means timer is ON at night.
Connect red-blue wires, then timer is ON during day.

Use ST01 without any voltage, or with any voltage

ST01 timer
Buy:
Intermatic ST01c timer at Amazon/ 1 year warranty
ST01C           
          Larger image             

CR2 battery  ST01 uses CR2 battery
Why can ST01 and Ei600 timers operate without voltage or control any voltage? Including 24 Volt AC/ DC or 120-208-240-277 volts

Because the timer is battery-operated. Battery lasts 2-3 years.
Because the timer does not need to be connected to 120 Volt AC or 240 Volt AC power to operate. Just the battery is needed
Timer can be located inside electric box, anywhere outdoors-or-indoors.

Buy ST01C white, ST01AC almond:
Intermatic ST01c timer at Amazon/ 1 year warranty
Intermatic ST01 timer
Ei600 5-year warranty timer at Amazon
CR2 replacement battery at Amazon


Resources:
How to program and wire ST01 timer
Use ST01 as 24 volt photoeye
Load ratings for Intermatic timers/ pdf
Load rating for ST01 timer: 120V ac, 6A, 208-277V ac; DC Loads 4A 12V dc, 2A 28V dc; Motors 1HP 120VAC, 2HP
240V ac, Ballast 16A 120V ac, 208-277V ac; Resistive 20A 120-277Vac.
Sellers of these products often don't know the numbers

ST01C is white, and ST01AC is almond... so if the seller is showing ST01, then timer is probably white.
http://waterheatertimer.org/pdf/067-ST01C-E1020.pdf

This is a very unique timer... can be used for many applications... motor control, photoeye, reverse photoeye, solar controller, HVAC controller, override any hardwired timer, stop doorbell from ringing certain times or day or all night
ST01 timer
Red-Blue-Black-green wires
LED display is not illuminated

How to wire ST01 timer

Connect 24 V AC to black wire
Connect Load to Blue wire
Cap off Red wire (red and blue connected, reverses timer programming)

Resource:
How to program and wire ST01 timer
Test ST01 timer
Testing the ST01 timer

Other uses for ST01 timer:

ST01 timer controls water heater or any 240 volt load
Reverse ST01 using Intermatic air switch   / Resource: Intermatic air switches
Use ST01C for 4-way timer
ST01 24 volt DC photoeye
Convert single-pole switch into 3-way switch using ST01/ Resource: How to add a switch   How to add 3-way switch
Use battery-operated ST01 timer for any voltage, or requires no voltage to operate, 24-hour, or 7-day, or dawn-dusk, or dusk-dawn,
Add a 3-way switch, or 3-way switch, or 4-way switch, used in place of photoeye, reverse photoeye, control 24 volt DC, turn off 12 volt doorbell when baby is sleeping, control motor load, control 3-phase, interface with delay timer

ST01 timer

ST01 timer can control motor loads/ no neutral wire needed

I recommend using relay for switch heavy-amp loads such as motors/ as shown in illustrations below

Buy ST01C white, ST01AC almond:
Intermatic ST01c timer at Amazon/ 1 year warranty
Intermatic ST01 timer
Ei600 5-year warranty timer at Amazon
CR2 replacement battery at Amazon
Timer for motor

24 volt timer for motor

Buy ST01C white, ST01AC almond:
Intermatic ST01c timer at Amazon/ 1 year warranty
Intermatic ST01 timer
Ei600 5-year warranty timer at Amazon
CR2 replacement battery at Amazon


Buy:
24 volt transformer
24 volt AC coil/ 30 amp relay at Amazon
24 Volt AC coil/ 40 amp contacts
24 Volt AC coil/ 40 amp contacts
ST01 timer controls motor

ST01 timer controls 120 volt motor

Install 10-15 amp line fuse to protect timer from overamp
Buy ST01C white, ST01AC almond:
Intermatic ST01c timer at Amazon/ 1 year warranty
Intermatic ST01 timer
Ei600 5-year warranty timer at Amazon
CR2 replacement battery at Amazon


Buy relay:
120 volt coil/ SPST 30 amp relay
120 volt coil/ SPST 30 amp relay
120 volt coil/ SPDT 30 amp relay
12 amp DPDT Packard at Amazon
40 Amp DPDT relay at Amazon
Busman HKP-HH fuse holder

Inline fuseholder

Buy inline fuseholder/ fuse block/ and fuse:
Panel mount fuse holders at Amazon
Buy fuseholder at Amazon
Buy fuseholders at Amazon

Fuse blocks at Amazon
30 amp fuseholder at Amazon
20 amp fuseholder at Amazon
Electrical terminals
Solder guns
Timer for motor

Enclosed relays/ Functional devices

Requires neutral wire
Install 10-15 amp line fuse to protect timer from overamp
Functional relays, or enclosed relays shown here, are not as heavy-duty as open frame relays shown below.
Buy:
Enclosed relays at Amazon
120 volt coil/30 amp DPST


Heavy-duty open frame relay

Optional box and cover for magnecraft

Recommend this relay for motors exceeding 120 volt 1 HP/ 240 volt 2 HP
Magnecraft/ Siemens relay with NO NC terminals 120 volt coil or 24 volt coil etc
These relay are heavy-duty and best for frequent-operation, long term control of motor
Buy from my affiliate links
Magnecraft box and cover
magnecraft w199 relays at Amazon
Siemens power relays at Amazon

Resources:
How to reverse motor with switch
Difference between contactor and relay
Relays for DC motors and solar panels
Control motor with 2 switches
Start two motors at different times
CN101A timer wiring
Larger image/ amico timer with dust cover

dust cover for amico timer
Dust cover
CN101A timer

Amico panel mount timers

24 volt AC timer
7 day 17 on-off settings

Buy from my associate links:
24 volt AC timer
Amico 120 volt 7-day timer
12 Volt/ 16 amp/ DC timer at Amazon
24 Volt/ 16 amp/  DC timer at Amazon
Dust cover for Amico timers at Amazon
Amico timers at Amazon
Transformer: 120-240 Volt to selectable DC voltage

Resources:
CN101A/ amico timer manual/ pdf with wiring
How to wire amico timer
Terminals

Voltage required to run timer

Illustration of wiring
CN101 wiring
To override thermostat.... Connect 24 VDC power to timer terminals located on right side
Connect thermostat wire to switch terminals located on left side of image above
Intermatic PB 800 series
Intermatic PB 800 series

Timer Modules

24-hour modules with trippers

Buy
120Volt at Amazon
240Volt at Amazon
Replacement trippers
Resources
Spa Module timers and manuals

Modules with segments

Buy:
120V at Amazon
240V at Amazon
Resources
Intermatic PB800-900 series
Intermatic timer modules

Wiring for timer modules

These modular timers have 4 terminals/ take photo of wiring before starting
Connect power to these terminals
2 terminals for clock motor
120V or 240V models

2 independent terminals for switching load
Connect thermostat wire to these terminals
B000IGCBVW
wireless light kit
Larger image


B003OYJRB2
Leviton WSSLT-10 SLT Circuit Interlock Transmitter, 120VAC, White

Skylink anywhere wall switch
Buy:
Transmitter switch at Amazon
Receiver at Amazon
Resource:
Skylink wall switch manual
Skylink on-off-dim module manual
Skylink on-off module manual
Product information at Leviton
Aprilaire relay

Aprilaire amp relay

When amp exceeds set point, the relay activates 120 volt circuit.
Use relay to control contactor when load exceeds 50 watts
Use to activate duct booster fan
Take off bracket and install bracket around a control wire that carries amperage
When amperage flows across line, the Aprilaire relay activates... and closes circuit going to 120 Volt load... such as indicator light... or another relay etc... the indicator light turns ON.

Buy
Aprilaire relay at Amazon
Current sensing relays

Resource:
Aprilaire manual .pdf
aprilaire relay

Orange 10 gauge 30 amp


Orange/ #10 gauge for for 30 amp circuits including water heater
with ground
Buy:
10-2 gauge/ 30 amp
10-3/ 30 amp

NMB is house wiring
UF is underground

Yellow 12 gauge 20 amp


Yellow/ #12 gauge wire for 20 amp
with ground
Buy:
12-2 gauge/ 20 amp
12-3/ 20 amp

Roll stranded wire

NMB is house wiring
UF is underground
White 14 gauge 15 amp


White/ #14 gauge wire for 15 amp
with ground
Buy:
14-2 gauge/ 15 amp
14-3/ 15 amp

NMB is house wiring
UF is underground

Copper ground wire
Use same size as other wire in circuit

Buy
Spools of ground wire
Ground rods at Amazon


Multimeter

Test for breaks in wire/ Test for voltage
Most appliance require 80% rated voltage to function correctly
Buy:
Multimeters at Amazon
Electric testers at Amazon 
Resource:
How to test and replace element
How to test thermocouple
Element tests for 120 volts
How to test wire
Safety when testing wires:
Never touch wet or previously flooded appliance.
Never stand on wet surface when working on electric.
Never stand on bare soil, put down dry boards.
Tape tester leads to wood sticks to keep hands away from power.
Use non-contact voltage tester before touching wires.
Never touch or lean into any made of metal.
Remove metal objects from pockets.
Do not use oxygen or fuel accelerants in same room as electrcial repairs

Resource:
Basic house wiring

Non-contact voltage tester

Test for power without touching connectorss
NEVER assume power is OFF
Buy:

Non-contact voltage tester Amazon
Electric testers at Amazon
 
Resource:
How to test electric power is off

Resource:
How to install terminals
Treminals

Terminals

Buy:
Terminal kit
Blue for 16-14 wire
Yellow for 12-10 wire
Read about terminals
wire connector assortment

Twist-on wire connector assortments

Do not reuse old connectors 
Buy

Connector assortment at Amazon
Connector assortment at Amazon

Resource
How to select and install twist-on wire connectors
Weatherproof wire connector

Weatherproof wire connector

Connector cavity is full of silicone
Built-in cover keeps silicone in place
Protect from water, dust etc
Buy from my affiliate links
Weatherproof size 14 to 6 Amazon
Weatherproof size 22 to 8 Amazon

Resource
How to select and install twist-on wire connectors
Wire connector wrench

Wrench to apply wire connectors

Tighten connector 
Buy

Wire connector blaster
Twist connector wrenches at Amazon

Resources:
How to twist wire
How to select and install twist-on wire connectors
Push on wire connectors

Push-on wire connectors in place of twist-on connectors

Buy:
Push on wire connectors Amazon
Red 3P connector for 10-14 gauge wire
Lever connectors for stranded wire at Amazon
add solder to stranded wire

Turn stranded wire into solid wire

Add solder to 1" length of tightly twisted stranded wire to make into solid wire
Heat wire. Touch solder to wire. Let cool. File away over-solder.
Buy:
soldering guns
Resource

Timer caught fire

linesman pliers
Buy tools:
Wire strippers at Amazon
Linesman pliers
Utility knife at Amazon
End cutting nippers at Amazon

Fire inside timer caused by stranded wire
Keep enclosure door closed at all times

Fire caused by stranded wire

Do not use stranded wire under screw plate

Applies to timers, switches, outlets, pumps etc.
Small devices, with small loads, such as lamp socket, stranded wire is fine
Add solder to 1" length of tightly twisted stranded wire to make into solid wire
Heat wire. Touch solder to wire. Let cool. File away over-solder.
Buy:
soldering guns
Resource

Timer caught fire

main breaker box
Larger image
See inside main breaker box
Electricity leaves power plant

What is 3-phase electric: power plant to end user

How to wire 3-phase timer


Basic household wiring
Basic water heater circuit

Figure volts amps watts for electric water heater
Test elements
Replace elements
How to wire tankless electric
How to change water heater temperature using timer
Change water heater from 240Volt to 120Volt
Replace thermostats
How to wire thermostats
How to wire water heater for off peak operation

How to twist wire
How to wire Cooper 277 pilot light switch
How to wire combo switch-outlet
How to replace 3-speed fan switch
 

How to wire dimmer
How to wire 3-way dimmer
How to wire occupancy switch
How to wire motion detector
How to wire TM811 and TM8111 switches
How to wire wall timers
How to wire box timers
How to wire off-delay timer
Wire off-delay timer
How to wire pin timers

How to wire and troubleshoot photo eyes
Reverse photoeye so it turns on in day
24 Volt photoeye
24 volt programmable timer

How to wire switches
How to add switch
How to add 3-way switch


Timer for 3-way switch
Timer for 4-way switch

How to add outlet 
How to wire 3-way switches
How to wire 4-way switches


Troubleshoot Malibu outdoor lights
Terminals 
Select and install wire connectors
Select wire size

Electrical formulas
Electricians forum
 

Electrical pages


How to wire arc fault breaker
How to wire GFCI
How to wire GFCI combo

Basic water heater circuit
How to wire water heater for 120Volt
Install old work box

How to drop wire from attic
Wire connector

How to wire 240volt outlets
How to install 3-phase timer
How to wire 3-phase outlets
How to wire 3-phase surge protector
What is 3-phase

How to wire whole house surge protector
How to wire under-counter water heater
 

See inside main breaker box
Replace breaker
Install subpanel

Fuseholder
Contactors
How to solder wires
Whole house surge protector
3-phase surge protection
Circuit breakers

Difference between 120 volt and 240 Volt
Difference between 50Hz and 60Hz
How to install electric meter on water heater
How to wire water heater thermostat
How to wire water heater with switches and timers

6x6x4 Enclosures
Intermatic timer enclosures

Convert AC water heater to DC
How to wire DC solar water heater
DC relays for solar water heater
How to add another thermostat to water heater

How many Kwh to heat water
Chart for figuring heating time for electric heater
Gas and electric water heaters Support the economy:
Buy water heaters  from my associate links:

50 gallon Gas water heaters at Amazon
40 gallon gas water heaters at Amazon
50 gallon Electric water heaters at Amazon
40 gallon electric water heaters at Amazon
Hybrid / heat pump/ water heaters at Amazon

Resources:
How to install gas water heater
How to install electric water heater
Troubleshoot gas water heater
Troubleshoot electric water heater
Point of use water heaters
Gas and electric water heaters Industrial electric at Amazon

Industrial supplies at Amazon

Industrial and scientific Amazon
Tools
Shop Amazon - DEWALT
Shop Amazon - Black and Decker
Shop Amazon - Stanley Tools
Shop Amazon - SKIL Tools
Shop Amazon - Porter-Cable Tools
Shop Amazon - Bosch Tools
Shop Amazon saws and saw blades
box timers Compare box timers

Control water heater w/ Z-wave
Intermatic control centers Control centers:
+ manuals and parts


All control centers and parts

Including Z-wave
programmable timer Compare programmable timers

Control water heater with programmable wall timer
Countdown timers Compare countdown timers

Control water heater with countdown timer
Low voltage power packs Low voltage transformers


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