Compare box-type water heater timers

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2012

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Timers at Intermatic

Timers at Grainger

Timers at Lowes

Timers at Home Depot

Tork Timers

Paragon timers

Intermatic at aplussupply

Large image of 240 V EH40

EH40 30 amp digital Programmable
Intermatic 30 amp 601571
> 240 Volt water heater timer
>7-day programmable > 7 TOTAL PROGRAMS
> days of the week can be different > no memory loss with power outage > 3-year back-up battery > external override
> 1 minimum on-off times
240V EH40 manual
120V EH10 manual
Manual for 120V ET171
EH40 at Grainger 240 Volt
ET171 at Grainger 120 Volt

How to wire EH40 water heater timer

How to wire EH10 water heater timer

How to wire EW103B

EW103B water heater circuit

Tork EW103B image

See all Tork timers
Tork EW103B 7-day digital Programmable
> 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

Tork EW103B at Lowes
Tork EW103B at Grainger

EW103B wiring diagram for 240V water heater
E-EW100B wiring manual
EW100B sales sheet with models and wiring
EW series instruction/programming manual

Buttons larger

Larger Image

SA 315 at Grainger
SA series at Amazon

Sylvania Timers
SA 315 40 Amp 240 Volt clock/ 240Volt circuit DPST Indoor/outdoor
SA 307 40 Amp 240 Volt clock/ 240Volt circuit DPST Indoor
SA 300 40 Amp 120 Volt clock/ 120Volt circuit SPST Indoor

CR2032 batteries.
Battery back up holds programming in power outage, metal housing
7-5-2 programming means weekends can be different

Sylvania SA300-manual 120V indoor    sell sheet    wiring
Sylvania SA310-manual 120V indoor/outdoor    sell sheet    wiring
Sylvania SA315-manual 240V indoor/outdoor       sell sheet    wiring
Sylvania SA306-manual 120V indoor/outdoor    sell sheet    wiring
Sylvania SA307-manual 240V indoor       sell sheet    wiring

EC4005 programmable

P-100 series

See all paragon timers with manuals

Paragon timers are discontinued
Paragon digital programmable EC4005
Indoor/outdoor models available
120V or 240V
16 set points per week
Day skipper, Manual override, Power outage carryover
Paragon 4000 series manual

Paragon P100 series mechanical timer
P-104 mechanical timer for 240V circuits
P-101 for 120V circuits
P100 Series Manual

EC 4005 wiring 120 & 240 wiring

P-100 series 120 & 240 wiring

Large image of 240Volt WH40

WH40 240 Volt mechanical timer
> lift and rotate dial to set clock > reset clock after power outage > attach Mechanical Time Tripper pins on dial to control on-off functions > manual override > cannot set short duration programming less than 1 hour > program times are approximate > each day is same.

Use T101 shown below for 120V water heaters

240V WH40 manual
240V WH21 manual

WH40 at Grainger
WH40 at Lowes

Intermatic WHQ for industrial water heaters

How to wire WH40
Tripper Pins type1 type2

How to wire WH21

Large image of T-104R 240 Volt Indoor-outdoor

T-104 indoor mechanical timer 240 Volt
T-104R indoor-outdoor mechanical timer 240 Volt
Minimum 1 hour on-off > 1-12 on-off per day > lift and rotate dial to set clock > reset clock after power outage > attach Mechanical Time Tripper pins on dial to control on-off functions > manual override so water heater runs continuously > each day is same

240V T-104 manual
Intermatic T100 series timers (buy direct from Intermatic)
T-104R for 240 Volt heaters at Grainger
T-101 for 120 Volt heaters at Lowes
T-101 & 104 at aplussupply
T-104 for 240 Volt heaters at Electric Supply
T100 Series at Amazon

How to wire T-104
How to wire T-101
How to wire T-103

Larger image

Intermatic T1906 mechanical 240 Volt

T1976 for 240 Volt with day skipper
T1905 for 120 Volt

Minimum 15 minute on-off periods, 96 operations per day, each day is the same, reset after power outage. SPST timer means 240 V water heater has one leg of live electricity that is not turned off.

T1900 series at Intermatic
T1906 at Supplies Online
T1905 for 120 V at Grainger

How to wire T1906 240 Volt
How to wire T1905 120 Volt

Large image of 120-240V GE 15132

GE 15132 digital programmable
> 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
> Indoor-outdoor
> 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
> rotate dial to set time > push dial segments down to set on-off functions
> Indicator lights show operation

GE 15132 manual

15132 at Home Depot

How to wire GE 15132

Large image of 120-240Volt GE 15207

GE 15207 mechanical indoor timer
> 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
> 24 on-off periods per day > Minimum 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 dial after power outage

GE 15207 manual
15207 at Home Depot
15207 at Jasco

How to wire GE indoor 15207
How to wire GE indoor/outdoor 15087

See Larger

Woods Indoor-outdoor Water heater timers

Woods 59396 <> 120 Volt clock requires neutral wire <> 120V or 240V 30 Amp load
> 59396 is SPST > clock motor is 120V > Good for 120 Volt water heaters.
> 59399 is DPST > clock motor is 120V > neutral wire needed
> 24 on-off periods per day > Minimum 1/2 hour on-off > each day is same > rotate dial to set time
> Reset time after power loss
See manual

Woods 59402 <> use dip switch to choose 120V or 240V clock <> 120V or 240V 40 Amp load
> 59402 is DPST > turns off both hot wires to 240V water heater
> 59401 is SPST > only turns off one hot wire to 240V water heater
> 24 on-off periods per day > each day is same > rotate dial to set time

> Reset time after power loss
> Good for 120 or 240V water heaters.
See manual
Wiring for 59402 similar to GE 15207 shown above

Typical 240Volt water heater wiring

Tork TU-40 Universal Timer	Tork WH water heater timer	See all Tork mechanical timers Tork TU Universal timer for 120V or 240V water heaters Larger image of 240Volt wiring Tork TU manual At Wholesale Tork WH water heater timer for 240V water heaters Large image of 120Volt wiring WH wiring manual WH sell sheet with 1 model

How to wire Tork DTU40	Larger image Tork DTU40 digital timer	Tork DTU40 timer 40 amp timer in Nema3 indoor/outdoor enclosure Automatically detects voltage Sell sheet Tork DTU40 timer instructions Tork digital timers

GM40 electronic time switch How to wire Intermatic GM40 GM40 and WHQ are identical timers GHQ water heater timer 24-hour and 7-day 24-Hour clock with 15 minute intervals At Grainger	GM40AVE digital 20 ON-OFF for 7-day or 24-Hour At Grainger	Intermatic GM40 series timers GHQ water heater timer 24-hour and 7-day GM40AVE digital heavy duty timer Can be used for simultaneous & off-peak wiring Indoor/outdoor box; Indicator lights; manual override Up to 8 gauge wire/ 40 amp contacts NO NC terminals; multiple wiring options GM40 mechanical manual GM40AVE digital manual GM40AVE programming instructions At Grainger
Wiring is same as shown below for Intermatic WHQ

Intermatic timers and manuals How to wire Intermatic GM40 GM40 and WHQ are identical timers	WHQ 9,600 watt water heater timer 120V 208-240V 277V 24 hour with 15 minute intervals 7-day Skip-a-day with 2 hour intervals Nema 3R indoor-outdoor enclosure Manual override on timer dial WHQ series sell sheet Nema 3R outdoor enclosure 24-hour 40 amp DPDT Battery backup 2-NO 2-NC contacts Up to 9.600 watts at 208-240Volt WHQ4 sell sheet WHQ7 7-day Water heater timer Battery backup 2-NO 2-NC contacts Up to 9,600 watts at 208-240Volt WHQ7 sell sheet WHQ timer instruction manual 40 amp x 240Volts = 9600 watts Two 4500 watt water heaters = 9000 watts. But timer and wire are running near maximum and exceed 80% rule recommended by electricians. 8 amp wire max 7680 amps Read more At Intermatic	WHQ water heater timer wiring Larger image See wiring for two 4500Watt water heaters 9,600 watts

Westek TM101 SPST	Westek TM104 DPST Larger image	Westek 120Volt and 240Volt mechanical dial timers 30 amp capacity Pins located on dial, divide 24 hour day into 15 minute intervals Each day repeats same schedule Intermatic mechanical timers minimum 1 hour. Intermatic at Amazon is less expensive, lasts longer and has replaceable trippers and motors. TM21 120Volt 25 amp (max 4500Watt) at Amazon TM101 120Volt 30 amp at Amazon TM103 120/240Volt 30 amp at Amazon TM104 240Volt (208-277V) 30 amp at Amazon TM104R indoor-outdoor

Large image of 120Volt T7401

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 > load carryover during power outage > 3 on-off cycles per day > minimum cycle 3.5 hours

240V Intermatic T7402BC
120V Intermatic T7401BC
Intermatic PDF manuals for T7401-2 (buy direct from Intermatic)
T7401B at WW Grainger
T7801B at Grainger

Sample manual

Electrical Tips for choosing box-type water heater 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.

Larger image

T2000 7-day timer

120V and 208-277V
42 ON 42 OFF per week
Minimum ON-OFF 2 hours
6 ON-OFF per day

NO NC terminals SPDT
Tripper: 156T1950A
Snap switch: 133T701A
120V motor: WG720-10D/ 208-277V motor WG723-10D
T2000 sell sheet

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. Check timer has enough on-off periods per day or per week
3.It is difficult to reset timers located in remote locations requiring flashlight, for example in attic or cluttered utility area.
4. Put timer at eye-level

In-wall timer is more difficult to install, but gives easy access, and adds value to home.