20 Most Recent Intermatic Outdoor Timer/Photo Control HB51RC Questions & Answers

http://waterheatertimer.org/Intermatic-timers-andmanuals.html#outdoor http://waterheatertimer.org/How-to-set-timers.html Gene If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Plug in make sure bulbs work rotate dial to set choice of delay times timer turns on at dusk,,, and delays off for amount of time you choose http://waterheatertimer.org/Intermatic-timers-and-manuals.html#outdoor Gene If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

http://www.intermatic.com/products/timers/consumer%20outdoor%20timers/electromechanical%20timers/hb51rc.aspx


1. Turn dial selector to the "off" position and
plug timer into three conductor outdoor outlet.
2. Turn dial selector to timing interval
desired (i.e., 2 Hrs, 4 Hrs, 6 Hrs, 8 Hrs,
dusk to dawn, etc.).
3. Plug outdoor lights into Easy-Set™ Timer -
lights will turn on automatically at dusk.
4. Lights turn off 2 4 6 or 8 hours later
depending on dial selection

Check out the HB61RC manual from Intermatic, here. I can't find an HB51R manual, but hese devices look very similar and probably operate the same way. I'll see if I find anything more - and will post it if I do. If this works - let me know - thanks & good luck!

If outdoor timer is programmable, and does not turn ON automatically at dusk, then timer can be used indoors.
If outdoor timer is activated by photo eye, and turns ON automatically at dusk, then it cannot be used indoors, because the timer turns ON when it senses darkness.
http://waterheatertimer.org/Intermatic-timers-and-manuals.html#HB51

it may be the wiring down stream,isolate the timer to a single device just after the timer

http://www.intermatic.com/products/timers/consumer%20outdoor%20timers/electromechanical%20timers/hb51rc.aspx

HB51 appears to be an automatic timer
Capacity is 1000Watts
Your lights are on so the circuit has power
I don't see any troubleshooting steps
It gives you a choice how many hours your lights stay on after dusk

You might try changing the selector to a different stay-on hour.
Turn timer off and unplug and then re-plug timer to see if it re-sets.

Otherwise, it looks like the photocell or 'timer brain' stopped functioning.

You posted under Intermatic make HB51 timer.

If this is not your timer, then add a comment.

To set for ON at dusk, and off 4 hours later, rotate dial to the number 4.
Timer turns on automatically at dusk because timer has photo eye.
Timer set to 4 hours will start countdown when timer turns ON > and 4 hours later timer will turn off.

Make sure timer is turned away from lights so photo-eye doesn't receive feedback.
Feedback is when the photo eye gets too much light, and then timer thinks it's dawn, so lights turn off, and a moment later photo eye thinks it's dusk again and lights turn on.
Feedback from lights will cause timer to reset the 4 hour countdown.
A car pulling in driveway can cause feedback.
If timer resets because of feedback, it begins 4 hour countdown again, so lights will not turn off until much later than planned, or not turn off until dusk.

You can test timer by putting black tape over photo eye, and then timer will turn on.
Set timer for 2 hours for example and then check if timer turned off 2 hours later.

If timer is not functioning correctly, then timer is defective.

I think the timer's photoelectric eye is getting too much light from the Load it turns on.
To check this, set timer at 2 hours, and then put black tape over the photoelectric eye so timer senses that it is dark and turns ON.
If timer does not blink with black tape, then problem is too much light with will cause on-off cycling of the timer.
If timer blinks with black tape over the eye, then timer is suspect. Exchange timer for another one.

Maybe the lights are causing photoelectric eye to sense that it's no longer dark.
This is called feedback.
To check this, set timer for 2 hours.
Put black tape over photoeye.
Check if timer turns on-and-off.

If timer continues to blink, then timer is suspect. Return it for another one.
If feedback is causing the problem, then turn timer away from lights or place obstruction between timer and lights.

manual for HB51RC
http://www.intermatic.com/%7E/media/files/intermatic/products/instructions/timers/hb61rc%20-%20english.ashx
See timer at Amazon
http://www.amazon.com/Intermatic-HB61RC-Digital-Outdoor-Control/dp/B00004W4X5

Plug timer into outlet
Plug lights into timer
Timer turns on automatically at dusk + override lets timer run during daylight hours
Timing cycle repeats each 24 hours
Use selector button to set timer
Timer must be reset after power outage or after unplugging timer.
Push selector button and choose one of following

F > Lights are OFF
O > Constant ON
1 through 9 > timer turns ON at dusk and turns OFF 1 to 9 hours later
d > timer turns ON at dusk and OFF at Dawn
1. through 9. > timer turns ON immediately and then turns OFF 1 to 9 hours later
Maximum wattage 1000
50 mini-bulb-string of Christmas lights is 25 watts

manual for HB51RC
http://www.intermatic.com/%7E/media/files/intermatic/products/instructions/timers/hb61rc%20-%20english.ashx
See timer at Amazon
http://www.amazon.com/Intermatic-HB61RC-Digital-Outdoor-Control/dp/B00004W4X5

Plug timer into outlet
Plug lights into timer
Timer turns on automatically at dusk unless you set override feature shown below

Timing cycle repeats each 24 hours
Use selector button to set timer
Timer must be reset after power outage or after unplugging timer.
Push selector button and choose one of following

F > Lights are OFF
O > Constant ON
1 through 9 > timer turns ON at dusk and turns OFF 1 to 9 hours later
d > timer turns ON at dusk and OFF at Dawn
1. through 9. > timer turns ON immediately and then turns OFF 1 to 9 hours later
Maximum wattage 1000
50 mini-bulb-string of Christmas lights is 25 watts

From these instructions, you should push button until 6 displays. Timer will turn ON at dusk and turn OFF 6 hours later
If timer.
If you want timer to turn ON immediately and turn OFF 6 hours later, push button until 6. shows in display.

If timer does not display or does not operate correctly, then timer is suspect. Return timer for another one.

The dawn to dusk feature is activated by photoelectric eye that senses when it gets dark.
If you put timer in a dark room, it will turn ON ... let's say to operate Christmas tree after you leave a room for the evening.
But if room stays dark, the timer will not sense when to turn off unless you also set timer to turn off 1-9 hours after ON.
That being said, a Christmas tree might make too much light for the timer's photoelectric eye.
Make sure photoelectric eye is turned away from direct light.

manual for HB51RC
http://www.intermatic.com/%7E/media/files/intermatic/products/instructions/timers/hb61rc%20-%20english.ashx
See timer at Amazon
http://www.amazon.com/Intermatic-HB61RC-Digital-Outdoor-Control/dp/B00004W4X5


Plug timer into outlet
Plug lights into timer
Timer turns on automatically at dusk + override lets timer run during daylight hours
Timing cycle repeats each 24 hours
Use selector button to set timer
Timer must be reset after power outage or after unplugging timer.
Rotate selector button and choose one of following

F > Lights are OFF
O > Constant ON
1 through 9 > timer turns ON at dusk and turns OFF 1 to 9 hours later
d > timer turns ON at dusk and OFF at Dawn
1. through 9. > timer turns ON immediately and then turns OFF 1 to 9 hours later
Maximum wattage 1000
50 mini-bulb-string of Christmas lights is 25 watts

I see nothing in the manual that says 'outdoor use only' EXCEPT timer runs on photoelectric eye.
Timer turns ON automatically at dusk, so if timer is inside, and indoor lights are ON, then timer stays OFF.

http://www.intermatic.com/~/media/files/intermatic/products/instructions/timers/hb51rc%20-%20english.ashx

http://www.intermatic.com/products/timers/consumer%20outdoor%20timers/electromechanical%20timers/hb51rc.aspx


To use timer outdoors.
Plug timer into wall.
Timer turns ON automaically at Dusk.
Rotate dial to set how long timer will stay ON.
Set timer to turn OFF 2 4 6 8 Hours after dusk
Set timer to turn off at dawn
Set timer to ON so lights are ON full time
Set timer to OFF so lights are off full time.

I don't think it is supposed to be in the "on" position when setting it up.
Turn dial to "off".
Then plug timer into grounded outlet.
Turn dial to 2, 4, 6 or 8 hours to run after dusk.
Plug in your outdoor lights.
Wait until dusk.
Let us know if this works.

Reading the broad description I would have said "yes if you can identify the input and output of each separate circuit. However the description says

• Selector switch to determine input voltage between 120-277 VAC

So you have to select the voltage on it. It appears there are also various model differences to the 1725 series designated by a letter at the end after the '5'. ET1725C, ET1725CR Ask their support https://www.intermatic.com/Product/ET1725C?setcontextlanguagecode=en https://www.google.com/search?q=Intermatic+1725+switch+220+and+110+simultaneously ..