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EH40 timer
Larger image/      Read about surge protectors
EH40
Large image of 240 Volt EH40
All Intermatic timers- manuals
Intermatic EH40 240Volt/ 7-day programmable / 7 programs/ 30 amp for 1 water heater/ external override until next programmed setting/ battery back-up
Size A battery located below programming buttons, lasts 3 years
Made for resistive loads like water heater/ For inductive motor loads etc see ET1100 and ET1700 series lower on page
30 amp up to 5500 watt non-simultaneous 240Volt/ to check your heater, look at label on side of tank
>7-day programmable > 7 TOTAL PROGRAMS
> 1 minute minimum on-off times/ Indoor box
> Each days of the week can be different > no memory loss with power outage > 3-year back-up battery
No repair parts are offered for digital timers > Reset after power surge
Warranty support through Intermatic
Buy 240 volt/ 7-day:
Intermatic EH40 timer
30 amp water heater timers
Resources:
240V EH40 manual
Figure volts amps watts of water heater
How to repair EH40
How to wire EH40 water heater timer

EH40 water heater timer
120Volt timer
Same appearance as EH40 above
Intermatic EH10    120Volt   7-day programmable
Size A battery located below programming buttons, lasts 3 years
>7-day programmable > 7 TOTAL PROGRAMS
> 1 minute minimum on-off times/ indoor box
> Each days of the week can be different > no memory loss with power outage > 3-year back-up battery.
No repair parts are offered for digital timers > Reset after power surge.
Warranty support through Intermatic
Buy 120 volt/ 7-day:
Intermatic EH10 timer
Resources:

120V EH10 manual
Figure volts amps watts of water heater
How to wire 120Volt EH10 water heater timer
WiFi relay
Woods 50054/ 30-40 amp DPDT
Auto detect voltage/ 120, 208, 240, 277 volt
Outdoor metal box with 3 knockouts for 1/2" or 3/4", located on sides and bottom.
Illustration shows test wire at my house before installation.
NO NC terminals/ DPDT
WiFi                                                                    

Buy from my links
DEWENWILS brand wifi
Wifi power switch
Resource:
How to wire wifi and install relay
GE z-wave contactor Z-wave contactor
120 - 208 - 240 - 277 volt
40 amp DPST 1 channel operation
Range 50' indoor, 100' sight line outdoor.
Min temperature 4°F Max temperature 104°F
Metal outdoor box/ Nema3R
Different brands interoperate with other brands zwave
Buy
GE z-wave contactor
Zwave from GE
Zwave from Leviton
Zwave from Aeon
Zwave from Smartthings

Resource
GE z-wave manual
How to wire z-wave contactor
water heater timer
Large image of 240Volt WH40
Same as T104 except with convenient override lever
Larger image

All Intermatic timers- manuals
All T100 series timers
Intermatic WH40 208-240Volt /10000watt /40 amp/ DPDT/ 24-hour / override on front of unit
40 amp up to 9000 watt non-simultaneous 240Volt/ to check your heater, look at label on side of tank
> 24 hour dial/ add up to 12 sets on-off trippers/ 2 sets on-off trippers arrive with product
> 1 hour minimum on-off time/ indoor box
Repair parts available. Warranty support through Intermatic
Buy 240 volt/ 24 hour:
WH40      208-240-277Volt 10000 watt 40 amp
T104  208-240-277V (same as WH40 except no external override)
Repair parts

156T1978 trippers
Replacement trippers
Clock motor WG1573

Resources

WH40 manual
WH40 sell sheet
How to operate and set timer
List of replacement parts
Parts and maintenance
How to wire WH40  
WH40 wiring
water heater timer
Nema1 indoor
T 104R
Larger image nema 3R indoor-outdoor

More T100 series timers including pool timers
Intermatic T104 series 208-240Volt /10000watt /40 amp/ DPDT/ 24-hour/ override located inside unit/ choose T104 indoor box or T104R outdoor metal box, T104P outdoor plastic box
More box choices available: See full list of models (sell sheet pdf)
Exactly same timer as WH40 except override located inside box
40 amp up to 9000 watt non-simultaneous 240Volt/ to check your heater, look at label on side of tank
> 24 hour dial/ add up to 12 sets on-off trippers/ 2 sets on-off trippers arrive with product
> 1 hour minimum on-off time/ indoor box
Repair parts available. Warranty support through Intermatic

Buy 240 volt/ 24 hour:
T104         208-240-277V Grey metal indoor box
T174 skip a day
T174 R outdoor box
T104R  outdoor box
T104P     Grey plastic outdoor box

T104M mechanism only/ no box
T104R3 Beige plastic outdoor box
T104P3 Beige plastic outdoor box
Buy repair parts
156T1978 trippers
Replacement trippers
Clock motor WG1573
Resources
More T100 series timers including pool timers
All available parts
T104 manual
T100 series sell sheet
Complete parts list
Pool timers
How to set and operate T100 series
How to wire T104 series

WH40 wiring
Intermatic T104P201 timer Pool timers and manuals and parts

Larger image T170 series

All Intermatic timers- manuals
Intermatic T174 240 volt series same as above except with day-skipper
Same as T104 above/ except with day-skipper... you can skip any day or multiple days of the week
Repair parts available. Warranty support through Intermatic
Buy 240 volt/ 24 hour
T174 skip a day
T174 R skip a day outdoor box
Clock motor
Replacement trippers
Resources:
Complete parts list
Sell Sheet with model numbers
How to wire T170 series/ identical to T104 and WH40 above
WH40 wiring
WH21 timer
Larger image
WH21  / TL11  /  240volt / 23 amp/ maximum 4500 watt water heater
Minimum 1/2 hour on-off times.
On trippers cannot be set closer than 2 hours
25 amp controls up to 5000watt water heater
SPST 240Volt
Red indicator light is ON when Load is ON
Replacement parts available/ Unknown warranty support/
Buy 240 volt/ 24 hour:
WH21      240Volt 23 amp
156EB1945a replacement trippers
WH21 clock motor WG233-18 from Intermatic
Manuals/ Resource:
WH21 manual
Troubleshoot WH21 timer
How to wire WH21/ illustration
WH21 wiring
Tork water heater timer
Larger image
Tork EW 103B

All Tork digital timers- manuals
Tork EW103B 7-day digital Programmable/ 20 set points per week
> 120 Volt or 240 Volt water heater timer
> 20 set points per week > each day can be different > 1 minute minimum
> Capacitor back-up: no memory loss with power outage
No replacement parts are offered/ warranty support through NSI
Buy 120-208-240-277 volt/ 7-day:
Tork EW103B DPST 120-208-240-277Volt
Resources:
More EW series 7-day models
E-EW100B wiring manual
EW100B sales sheet with models and wiring
See all Tork timers
EW series instruction/programming manual
How to wire EW103B

EW103B water heater circuit

Steel outdoor box
Larger image


Plastic outdoor box w/ see thru door
More ET series timers
ET1700 series / 30 amp timer/ DPST/ 7-day programmable/ 28 set points (14 ON- 14 OFF)
Arrives with default 120Volt, choice of output 120, 208, 240, 277V
Set selector switch to 240 for water heater/ can be used for motor loads and water heaters etc
Retains programs after power loss/ choice of box types for indoor and outdoor
No repair parts are offered for digital timers
Warranty support through Intermatic

Buy 120-208-240-277 volt/ 7-day:
ET1705C/            Steel indoor box/ 30 amp/ 7-day/ SPST programmable/
ET1705CPD82/   Plastic outdoor box w/ see-thru door/ 30 amp
ET1705CR/          Steel outdoor box/ 30 amp

ET1725C               Steel indoor box/ 30 amp / 7-day/ SPST or DPST
ET1725CPD82      Plastic outdoor box w/ see thru door/ 30 amp
ET1725CR             Steel outdoor box/ 30 amp

Resources:
ET1700 series sell sheet with model numbers and features
ET1715C manual
ET1725C manual

More ET series timers/ including 24-hour ET1100 series, and ET1800 astronomic series
ET8015 ET8000 Series /7-day astronomic or programmable/ 1 or 2 channel/ 120-240-208-277Volt/ 1 and 2 channel models/ programs held in memory with power loss
7-day astronomic dawn-dusk timer/ or 28 ON and 28 OFF setpoints
2 channel timer means 2 independent circuits can be operated with separate programs for each/ 1 channel means timer can operate 1 circuit with same program
Sunset ON and programmed OFF options
Selectable voltage 120 thru 277 volt 30 amp.
Warranty support through Intermatic
Buy;
ET8015C/  steel indoor box/ 30 amp/ SPST / 1 channel/timer
ET8015CR/ steel outdoor box/ 30 amp
Intermatic ET8215 timer
Resources:
ET 8000 series sell sheet with model numbers and features
ET8015C manual
ET8115C manual
ET8215C manual
How to wire ET series timers
Tork DTU water heater timer
Larger image
Tork DTU40 digital timer
All Tork digital timers- manuals
Tork DTWH40 and  DTU40 40 amp/ programmable/ 120-208-240V auto detects voltage
40 amp timer in Nema3 outdoor enclosure/ Nema 1 indoor box
Automatically detects voltage/ no dip switches
7-day programmable timer/ Minimum 1 minute schedule
Versatile wiring options/Ni-MH Battery Type
No replacement parts are offered/ warranty support offered through NSI
Buy 120-208-240-277 volt/ 7-day:
DTU40 120-208-240-277V electronic with override/ outdoor box
Resources:
Sell sheet
Tork DTU40 timer instructions
More Tork digital timers
How to wire Tork DTU timer
Large image of 240Volt wiring
Tork-DTU40 wiring

Tork TU universal timer
Tork TU-40 Universal Timer
All Tork timers and manuals
Tork TU Universal timer for 120V-208V-240V/ auto detects voltage
40 amp timer in Nema3 outdoor enclosure
Automatically detects voltage/ no dip switches
24-hour dial/ Minimum 15 minute schedule
Versatile wiring options
No replacement parts are offered/ warranty support offered through NSI
Buy 120-208-240-277 volt/ 24 hour:
Tork TU series universal timer
Resources

Large image of 240Volt wiring
Tork TU manual
Tork TU and other Tork mechanical timers
Large image of 240Volt wiring
GE 15146 timer
Larger image

All GE timers and manuals


Tork 1102/ GE 15146    240 volt/ 40 amp  24 hour /indoor metal box/ same as Tork above
24 hour-240Volt, Same as Tork 1104/ 240Volt clock motor
Replacement parts available. Warranty support through Jasco
Buy 240 volt/ 24 hour:
Tork 1102 208-277 SPST
Tork P47 trippers
#101 120Volt clock motor
#201 208-277Volt clock motor
Resources:
Tork 1100 series timer and manuals
Control 277 volt or two 240Volt GE 15146
Larger image 240Volt wiring
Tork WH series
Larger image: timer controls two 240Volt Loads
GE 15326 timer
Larger image
Terminals


All GE timers and manuals

GE 15328 timer/ 40 amp 240Volt// 24 hour/ same as Tork above except different override
40 amp/ indoor box
On-off override on front of box
Similar to Tork 1104 timer/ except override location
1/2"-3/4" Knockouts on sides, bottom, back of timer
Replacement parts available/ warranty support through Jasco
Buy 240 volt/ 24 hour
Buy 1
Buy 2
Buy replacement parts

Tork P47 trippers
#201 208-277Volt clock motor
Replacement parts list
Resources:
GE Jasco 15328 timer manual
Large image of wiring
Tork WH series
Same as Tork WH and Tork 1104 timers shown above
Sylvania SA 315
Larger Image
Buttons larger
SA 315Sylvania timersSylvania timers and manuals
Sylvania / Tork SA315/ 7-day programmable/ 240Volt / 40 amp
Up to 7680 watts at 240Volt
CR2032 batteries.
Battery back up holds programming in power outage, metal outdoor box
'Lifetime warranty'/ most timers have standard 1 year warranty/ however most 240Volt electronic appliances are NOT protected from surge, and warranty might not cover surge damage+
No replacement parts are offered/ warranty support offered from Sylvania or NSI Tork
Buy 240 volt/ 7 day:
SA307 240 volt indoor box
SA315 240 volt indoor/outdoor box

Resources
SA315          sell sheet            wiring
SA307                 sell sheet            wiring

Buy 120Volt models
SA300 / 120 Volt DP indoorSA310 120 Volt DP outdoorSA306 120 Volt SP outdoorMore Sylvania timers and manuals
GE 15136 timer
All GE timers and manuals
GE 15136 7-day programmable/ 120-208-240V/ select voltage using dip switches
> 120 Volt or 240 Volt water heater timer/ change dip switch to select clock voltage
> DPST turns off both hot wires to 240V water heater
> Outdoor box> 7 day programmable timer > 9 on-off settings per day > days of the week can be different > back-up battery > no reset after power outage >Indicator lights show operation. No replacement parts available/ warranty support through Jasco


Buy 120-208-240-277 volt/ 7 day:

GE 15136 outdoor metal box
Resources:

GE 15132 manual
How to wire GE 15136
GE-15207
All GE timers and manuals
GE 15207 24 hour/ 120-208-240V/ select voltage using dip switches> 120 Volt or 240 Volt water heater timer/ change dip switch to select clock voltage> DPST turns off both hot wires to 240V water heaterMinimum 1/2 hour on-off > each day is same > rotate dial to set time > push dial segments down to set on-off functions > Indicator lights show operation> Reset time dialafter power outageNo replacement parts available/ warranty support offered through Jasco
Buy 120-208-240-277 volt/ 24 hour:
GE 15135 outdoor metal box
Resources:

GE 15207 manual
How to wire GE indoor 15135

Woods water heater timer
See Larger

All Woods timers- manuals

Woods 59402 / DPST/ 40 amp/ 24 hour/ use jumpers to select 120-208-240V
Woods 59401/ SPST/ 40 amp/ 24 hour/ use jumpers to select 120-208-240V
120V or 277V or 208V-240V water heater and appliance
Jumper settings to change voltage
48 segments located around edge of timer dial/ 15 minute intervals
No replacement parts available/ warranty support through CCI
Buy 120-208-240-277 volt/ 24 hour:
Woods 59402 DPST
Buy 120-208-240-277 volt/ 24 hour:

Woods 59401 SPST
Manuals/ resources
Woods 59401 and 59402 manual
59401 sell sheet
59402 sell sheet
Wiring for 59402 DPST same-similar to GM40 timer
How to set analog  timers
Typical 59401 SPST wiring
woods timer wiring
Typical 59402 DPST 240Volt water heater wiring
Woods timer wiring
More wiring options for DPST timers
Woods 59104    Woods 59104
40 amp

Larger image
Coleman 59000 series box timer/ 40 amp
Nema1 indoor enclosure, or Nema 3R outdoor enclosure
48 set points per 24 hour. 1/2 hour ON-OFF. Manual overide
1/2 hour segments located around timer dial:  Push downward for ON, upward for OFF

1) Rotate dial until current time lines up with stationary pointer

2) These timers Fit directly into Intermatic enclosures, or can fit Tork enclosure using IAP adapter
Resources: Intermatic enclosure, or Tork enclosure

59101 series/ SPST/ 120 volt

Manual Buy:
Indoor box Manual 59101 timer
Outdoor box Manual
Mechanism-only no box
Will snap into any Intermatic enclosure
Manual
At Amazon

59103 series/ DPST/ 120 volt

Manual Buy:
Indoor box Manual 59103 timer at Amazon
Outdoor box Manual
Mechanism-only no box
Will snap into any Intermatic enclosure
Manual At Amazon

59104 series/ DPST/ 240 volt

Manual Buy:
Indoor box Manual 59104 timer at Amazon
Outdoor box Manual At Amazon
Mechanism-only no box Manual

Westek TM104
Westek TM104 DPST
Larger image

Westek TM104 / 240Volt / 24 hour/ SPDT/ choose indoor or outdoor metal box/ 40 amp max 5800 watt
40 amp capacity/
Pins located on dial, divide 24 hour/ 15 minute intervals
Repeats schedule each day
Permanent, on-off-timer override switch
No parts available/ unknown warranty support...probably shows on manual
American Tack & Hardware, Tel: (800) 777-0802 ?

Buy 240 Volt/ 24 hour:
TM104 (T104D) /208-240-277V 40 amp/ DPST with 1 NC and 1 NO terminals/
TM104R with outdoor box
TM21 240 Volt 25 amp (max 4500Watt)
Buy 120 Volt/ 24 hour:

TM101 SPST 120Volt 30 amp
TM103 DPST NO NC terminals 120 Volt clock motor/ 40 amp
Resources

How to set analog timers
TM104R manual/ pdf
Possible wiring for TM104 (T104D)/ SPDT 208-240-277Volt/ 40 amp
TM104 wiring
Possible wiring for 120Volt TM101 SPST

Westek THWH21 timer
Larger image

Westek THWH21 / 240Volt / 24 hour/ SPST/ indoor metal box/ 25 amp max 4500 watt
25 amp capacity/ maximum 4500 watt
Pins located on dial, divide 24 hour/ 15 minute intervals
Repeats schedule each day
Permanent, on-off-timer override switch
No parts available/ unknown warranty support...probably shows on manual
American Tack & Hardware, Tel: (800) 777-0802?

Buy 240 Volt/ 24 hour:
TM21 240Volt 25 amp (max 4500Watt) / indoor box/
TM104R 120Volt 40 amp / outdoor box)/
Resources:

How to set analog timers
THWH21 240Volt 40 amp timer manual/ pdf
Wiring for 240Volt TMWH21 240Volt 25 amp timer
TM104 wiring
120Volt timer
Westek TM101R timer


Westek TM101 / 120Volt / 24 hour/ SPST/ choose indoor or outdoor metal box/ 45 amp
For 120Volt water heaters
40 amp capacity
Pins located on dial, divide 24 hour/ 15 minute intervals
Repeats schedule each day
Permanent, on-off-timer override switch
No parts available/ unknown warranty support...probably shows on manual
American Tack & Hardware, Tel: (800) 777-0802?

Buy 120 Volt/ 24 hour:
TM101R 120Volt 40 amp / outdoor box)/
TM101 120Volt 40 amp/ indoor box
Resources:
How to set analog timers
TM101 120Volt 40 amp timer manual/ pdf
Wiring for 120Volt TM101 120 Volt 40 amp timer
TM104 wiring
GM40AV mechanical timer
GM40 electronic time switch

All Intermatic timers- manuals

Intermatic GM40 Series commercial grade 24-hour or 7-day models/ indoor-outdoor box/ 120-208-240V/ 40 amps
GM40 24-hour
GM40W 7-day
40 amp NO NC contacts/ 120V 208-240V 277 V/ Dip switches to select voltage
50,000 operations full load
Set dip switches before applying voltage
15 minute timer intervals on 24 hour timer/ 2-1/2 hour time intervals on 7-day
No replacement parts/ warranty support through Intermatic
Buy 120-208-240-277 volt/ 24 hour:>
GM 40       120-208-240-277Volt 24-hour
GM40 AVE auto-detect voltage 24 hour
GM40AV-Q digital 7 day
Manuals/ Resource:

GM40 instruction manual
Sell sheet with model numbers
Sell sheet 2
Wiring diagrams: How to wire GM40 timer
Wiring diagrams: How to wire GM40 timer/
GM40 water heater timer wiring
Woods timer wiring
See wiring for two 4500Watt water heaters
GM40AVE digital timer
GM40AVE digital
20 ON-OFF for 7-day or 24-Hour

All Intermatic timers- manuals

Intermatic GM40AV-Q 7-day/ 20-50 set points / 40 amp/ indoor-outdoor box/ 120-208-240-277V/ auto detect voltage
Automatic voltage detection 120-277V
Single channel FM1D20 digital timer/ 20 set points
Digital / 40 amp NO NC contacts
NEMA 3R indoor/outdoor enclosure
Automatically detects voltage
120V thru 277V automatic voltage detection
24 or 7-day. Battery back-up
1 channel timer: The independent relays can be wired for different loads, but both relays turn on-off at same time. Replacement timer module available/ warranty support through Intermatic
Buy 120-208-240-277 volt/ 24 hour and 7-day:
GM40AV-Q  120-208-240-277Volt
Manuals/Resources:
GM40AVE manual
GM40AVE sell sheet
FM1D 20 setpoint programming
FM2D 50 setpoint programming
Wiring diagrams: How to wire GMAVE timer/ same as GM40 and WHQ series
Basic GM40AVE timer wiring
Woods timer wiring
See wiring for two 4500Watt water heaters
T7801BC
Large image of 120Volt T7401

All Intermatic timers- manuals
Intermatic heavy-duty 7-day mechanical timer/ minimum 3 1/2 hour on-off/ 40 amp
Heavy duty 7-day mechanical timers > more expensive than digital programmable shown at page top > mechanical timers are simple to set > each day of the week can be different > day skipper > some models have load carryover during power outage

T7400B series 120V models /208-277V models/ 4PST/ dry terminal
T7800B series 120V models /208-277V/ 2 NO 2 NC/ dry terminals
Repair parts available/ warranty support through Intermatic
Buy 208-240-277 volt/ 7-day:
T7402BC indoor box/ power carry-over/ 208-240-277V/ 4PST/
T7402B indoor box/ 208-277Volt/ 4PST/
T7802B indoor box/ 208-277Volt/ DPDT 2NO 2NC/
Intermatic T7802B timer

Buy 120 volt/ 7-day:
T7401BC indoor box/ power carry-over/ 120V/ 4PST/
T7401B / indoor box/ 120 Volt/ 4PST/
T7801BC indoor box/ power carry-over/ 120V/ DPDT 2NO 2NC/
T7801B / indoor box/ 120 Volt/ DPDT 2NO 2NC//
Repair parts
156T1978 trippersReplacement trippers
131T68GA 125V motor with carryover
WG1600 125V motor
WG1603 208-277V motor

Resources:
T7400-7800 Sell sheet with wiring
Sample manual
Electrical Tips for choosing box timer
1. Check load rating is 30 Amps or more for safety. Most 240V water heaters are 3500, 4500 and 5500 Watts divided by 240 Volts = 14.5 Amps, 18.8 Amps, and 23 Amps.
2. In southern states, outdoor installation in direct sun will shorten life of timer.
3. For easy wiring, match clock voltage with water heater voltage 
4. Timers listed on this page are safe for 1 residential water heater/ but some of them are rated 9,000 watts and can control two water heaters (GM40, T104)
water heater timer in attic
Water heater timer in attic is not convenient
Tips for choosing & installing water heater timer
1. Re-setting timers after power outage is inconvenient, especially when located outdoors after thunderstorm.
2. It is difficult to reset timers located in remote locations requiring flashlight, for example in attic or cluttered utility area.
3. Check timer has enough on-off periods per day or per week
4. Put timer at eye-level
Install timer for easy access
water heater timer switches In-wall water heater timer
More difficult to install, but easier to set controls
Modular repairs, more timer choices
Water heater is controlled by timer, or home automation: zwave, wifi, insteon
How to install
All timer options
Water heater timer
See water heater timer installation
I discovered that the timer caused me to schedule hot water use, and my overall usage declined.
Reducing consumption is the key to saving money with any type water heater
Handy resources:

Family chart for setting water heater timer
How to install electric meter on water heater
How much does it cost to operate water heater
How much does water heater timer save
Off-peak water heater options
Troubleshoot electric water heater



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