Question about Intermatic & Indoor/Outdoor Rain Tight Timer

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Bought a Intermatic sprinkler timer. need help.

How do I wire a 6 zone sprinkler system to this Intermatic sprinkler timer model T8845pv. Old timer had a spot for 10 zones each zone wire wired in it's on slot.The new Intermatic has a Line slot with a white and black wire, A neutral slot with a white wire and a two yellow wires hanging from the box.

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  • e_tour2000 May 10, 2009

    I suspect the two yellow wires needs to be connected somewhere since it connects to the transformer which is new and not present in the old unit. I connected the white and black wires as in the old unit.

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Reading the specs i should say its a timer for only one zone. you can use it for one zone switching or for the pump. sorry.

Posted on Feb 14, 2010

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1 Answer

Why isn't the timer going off/changong zones?


Go to the Intermatic website and download the instructions. There may have been a design change. If possible, compare old and new instructions.

Jun 19, 2015 | Intermatic T8845PV - Sprinkler-Irrigation...

1 Answer

How to connect my well pump to timer


T8845PV has 120 volt input.... but 24Volt output,
You can use 24 volt to control contactor that can be used to switch 120-240 volt pump
Wiring on following link:
http://waterheatertimer.org/How-to-wire-Intermatic-sprinkler-timers.html

Gene

Water Heater Timers Save Money

Dec 02, 2013 | Intermatic T8845PV - Sprinkler-Irrigation...

1 Answer

T8845pv


You have 120Volt Intermatic sprinkler timer with 24Volt output.
Copy following link for setting sprinkler timer:
http://waterheatertimer.org/pdf/How-to-Set-and-Troubleshoot-Intermatic-sprinkler-timer.pdf
Copy following link for wiring Intermatic sprinkler timer:
http://waterheatertimer.org/How-to-wire-Intermatic-sprinkler-timers.html
Add a comment
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May 25, 2013 | Intermatic T8845PV - Sprinkler-Irrigation...

1 Answer

On auto mode sprinkler start sometimes out of the time zone


Maybe the trippers are worn out??
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#sprinkler
Add a comment and give model number of product, and say if this is new installation or older installation that stopped working recently.

May 05, 2013 | Intermatic T8845PV - Sprinkler-Irrigation...

1 Answer

Hunter pro C will not allow all zones to water.


The fact that you are getting no error message indicates that programming is not right, or there is electrical short between timer and sprinkler solenoid:

With all digital timers, it is important to clear memory before starting, and then double-check there are no conflicts in programming.
Page 22-23 of the manual has quick-check procedure for identifying shorts that would cause problems.
Check outlet with circuit analyzer to check for correct polarity and grounding.
Google search Hunter Pro C manual to download searchable pdf manual
Keep in mind also that digital timers are susceptible to line noise, and power surge. Simple power outage can disable digital timer. There are no replacement parts.
That's why I recommend good old fashion 14-day repeat-cycle mechanical sprinkler timer with fewer features, but replaceable parts.
For example T8845PV with 24Volt ac output
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#sprinkler
http://waterheatertimer.org/How-to-wire-Intermatic-sprinkler-timers.html
http://waterheatertimer.org/How-to-wire-Intermatic-sprinkler-timers.html#T8845PV

Jul 15, 2012 | Hardware & Accessories

1 Answer

Im trying to change out my automatic sprikler timer, the new one is Intermatic model T8845PV. Its an old house I have two hot wires going in to the old timer, and I only see one spot for my hot wire in the...


Open following links for resources:
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#sprinkler
http://waterheatertimer.org/images/T8845PV-image-700.jpg

If you have 2 hot wires, then you have 240Volt circuit from breaker box.
T8845PV is 120Volt timer.
How to wire for 120Volt: Use one hot wire to connect to LINE terminal. Cap off other hot wire. Then connect bare ground wire to terminal marked NEUTRAL.
This is not code, but it will work until you have time to run 120Volt line from nearby 120Volt outlet.
Read about 120 and 240Volt circuits
http://waterheatertimer.org/B220C.html

T8845PV is 120Volt timer, made to control 24Volt sprinkler valve.
Inside the timer, there are two wiring terminals marked LINE and NEUTRAL
120Volt cable from circuit breaker has black hot wire and white neutral wire.
Connect black hot to terminal marked LINE
Connect white neutral to terminal marked NEUTRAL

The yellow wires are 24Volt output.
Yellow wires connect to sprinkler valve.
Do not connect 120Volt to yellow wires.
This timer does not have terminals for rain sensor:
http://waterheatertimer.org/pdf/How-to-Set-and-Troubleshoot-Intermatic-sprinkler-timer.pdf

Jul 31, 2011 | Intermatic & Indoor/Outdoor Rain Tight...

1 Answer

The timer no longer plays all 3 programmed zones. It play only one.


Three things to look for:
1) If sprinkler turns on-off but doesn't advance to next zone, then Sprinkler Valve is suspect, and timer is good.
2) If sprinkler stays on all the time, or never turns on, then Timer is suspect.
3) If sprinkler turns on-off, but leaks when it's supposed to be off, then Sprinkler Valve is suspect, and timer is good.
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#sprinkler

Jun 24, 2011 | Intermatic T8845PV - Sprinkler-Irrigation...

1 Answer

I have Intermatic sprinkler model T8845pv. I want to set it for daily watering in only one of 8 zones. When I remove the gold pins in the main dial and locate the zone I want to water, it waters the...


Intermatic sprinkler timers are 24 hour repeat cycle, with day-skipper option.
The timer does not change zones. The timer just turns ON-and-OFF at scheduled times.
Each tripper represents 12-15 minutes of watering. And then the timer circuit turns OFF.
When timer circuit turns OFF, the sprinkler system is designed to advance to next zone each time.
So when the timer circuit turns OFF and then turns ON again, your sprinkler control starts watering the next zone. This is the way sprinkler systems are designed.
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#sprinkler

If you had a sprinkler system with 1 zone, or could change your sprinkler system to 1 zone on certain days, then the timer would turn that zone on-off each time.
Call a local sprinkler company and see if they have a dual control or some solution >> but sprinkler controls are outside my area of expertise. I am timer expert.

You could solve problem with two separate sprinkler systems, but that would require two timers. I have never seen a 2-channel sprinkler timer. There are electronic two-channel timers that can handle two different programming schedules with minimum 1 minute on-off, and these timers can cost a few hundred dollars up to thousands, PLUS cost of the dual sprinkler system. Add a comment and let me know if two-channel timers are something you want information on.

Apr 27, 2011 | Intermatic R8806P101C -...

1 Answer

The time works, but SOLENOID does not come on - the SOLENOID was working prior, but the timer was not working, was able to put on manual, but that does not happen now - i have the two yellow wires from the...


http://www.intermatic.com/products/timers/mechanical%20time%20switches/sprinkler%20irrigation%20timers.aspx

http://waterheatertimer.org/pdf/Intermatic-t8845pv.pdf

http://waterheatertimer.org/Intermatic-trippers-and-parts.html#sprinkler

T8845PV has 2 yellow wires for 24Volt output that powers solenoid.
1) Yes the yellow wires connect to two wires on solenoid.
2) 120Volt power arrives from breaker box. Black hot wire connects to Line terminal screw. White neutral connects to Neutral terminal screw. Check for 120Volts across both terminal screws.
3) Next check that output on yellows wires is 24Volts. The manual does not specify if that is 24Volt AC or DC. I assume that means it is AC. Buy cheap multimeter at home center to check 24Volt output.
4) Tests from 2) and 3) will tell you if 120V circuit is problem or if transformer has gone bod or if solenoid is suspect.
5) T8845PV uses T8845PV transformer, but it might be cheaper buying whole new timer and then snapping new mechanism into existing box
http://www.1000bulbs.com/product/3422/ELEC-T8845PV.html

Apr 21, 2011 | Intermatic T8845PV - Sprinkler-Irrigation...

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