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Hi , i wondered if anyone can help me? I have recently purchased a 12v 3 minute delay off timer, I am trying to rig it up to my waterpump which pumps the water around my camper for the webasto night heater. Basically i want it to carry on running the water pump for 3mins after i have turned the night heater off. The delay timer i have puchased is a fuji ST3PF delay off 8 pin timer. The diagram on the side of it states terminals 2 and 7 input(doesnt state which side is positive and negative) terminal 8 com terminal 6 normally open terminal 5 normally closed treminal 3 says connection above it and shows a link to terminal 4 with the word reset printed in the middle of the linking line. Can anyone please tell me which wires i connect to where, as iv been pulling my hair out trying to fathom out what goes where n im now completely bald. Any help is much appriciated. i have only basic knowledge of 12v electric and relays so nothing to technical please thanks steve

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Hello, Having the same power supply voltage to the coil of the relay, pin 7, and also the thing you want to stay on for more seconds, pin 8, will not work. When you kill the power to the relay the other thing will go off right away as well and a few seconds later, you will hear the relay switch. I made a diagram to show how it works to have a solenoid valve close 30 seconds after the water pumps stops. This is to let the water slow down before the valve closes to prevent water hammering.o,

Hi , i wondered if anyone can help me? I have - wondered-anyone-help-me-dngbouuf0xnewoajm5wetpwu-5-0.jpg

Posted on Jan 23, 2015

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: I have a Et 70115C

A) 5 terminal ET70115C.
Voltage selector set to 240.

B) BUT you say you have 120Volts from breaker >>> confusing, so I'm proceeding on basis that you meant to say 240V from breaker.
Add a comment at any time.

C) Review timer:
5-terminal ET70115 timer has NO and NC terminals
NC is normally closed >> this terminal has power when timer is OFF
NO is normally open >> this terminals has power when timer turns ON
For water heater, you want NO terminal 4 so water heater turns ON when timer turns ON

D) Wire for 240Volt water heater

Two hot wires from breaker connect to terminals 1 and 2. This powers timer clock.
Jumper wire connects between terminal 2 to terminal 3. This sends power to the switch circuit.
Wires to water heater connect to terminals 1 and 4

E) 5-terminal timer turns off 1 hot wire to 240V water heater.
Turning off 1 hot wire will stop 240V circuit from working; Water heater thermostats also turn off one hot wire.
240V water heater has black and red wire.
Wire from terminal 4 should connect to Black wire on water heater.

Diagram shows two wires on terminal 1
Two wires on terminal 2
One jumper wire on terminal 3
One wire on terminal 4
Zero wires on terminal 5


geno_3245_133.jpg

Posted on Dec 03, 2010

  • 5245 Answers

SOURCE: I am having trouble wiring a 120V time delay relay. Any help would be greatly appreciated.

You have 120Volt 8-pin off-delay timer.
When you put power to terminals 2 and 7, test which other pins are energized.
120Volt Black Hot wire usually goes to terminal 7 and Neutral white wire goes to terminal 2.
As general rule the other terminals are dry and receive no voltage when timer is energized at terminals 7 and 2.
This means you must add a jumper wire from your Hot wire on terminal 7 to the Com terminal 8. This action will energize both Com terminal 8 and NC terminal 5. So test if 5 and 8 have continuity when timer is off. And test if both are powered when Com terminal is energized.

Then when timer activates, NC terminal 5 will no longer receive power from Come terminal, and NO terminal 6 receives power instead.
Copy following link for general illustrations that may apply to your timer and application:
http://waterheatertimer.org/How-to-wire-pin-timers.html

Posted on Aug 05, 2012

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