Question 1

Does this unit have a battery backup so I wouldn't lose time set?

Accepted Answer

Yes it does. I have had mine now for three years and I turn off the power for about 7 months out of the year, and I still have not lost the programming yet. The only thing I don't like about this unit is how the door latches. It is very secure but can be difficult to open.

Question 2

What is the lease amount of time it can be set for like 15 on 5 off 15 on for one day every other day?

Accepted Answer

According to the manual, it has 7 total programs.  Each program has an on and off setting.  If you set something for every day it only uses one program so you could set up to seven programs in a day, so for your example it would only take up two programs.  The granularity of the settings are in minute increments.  It also doesn't check if you set it up properly, at least to the best of my knowledge.

Question 3

can you set this timer to run 3 times 3 hour each time in a 24hour period

Accepted Answer

Thanks for your question. This timer can be programmed with up to 7 different programs (7 on settings / 7 off settings) per week. If you apply the same program to every day of the week, it only counts as one program so you still have 6 programmable spots left. You could set up 3 different programs with on and off periods for one day. Feel free to give us a call at 1-800-468-1502 if you want to discuss this further. Hope this helps! -Kari

Question 4

Does anyone know is this suitable to use for a 30amp water heater and how many timer programmes per day can you use. Is it manual clock or digital

Accepted Answer

A typical domestic water heater is 4500W for each element at 240V, but only one element is allowed to come on at a time. So that's 4500/240 = 18.75 amps. Even with a 10% or 20% margin, this Aube timer - rated at 30 amps - is more than sufficient. This item allows 7 programs. So you could have a different schedule  of 1-off/1-on on 7 different days, or you could have 7 identical on-off cycles for all days. One of the beauties of this unit that distinguishes it from the others (including Intermatic digital timers) is that you can install an external SPST switch (a basic light switch will work fine) which overrides the unit and puts it into manual or switches it back into automatic. So, for example, I can use the switch to put the water heater into manual mode and leave it off when I go on vacation. Then, I leave instructions for my house-sitter to just throw the switch and put it back into automatic mode on her last visit so we have hot water when we get home from the airport.

ASIN	B001QFZ3XW
Best Sellers Rank	#508,339 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #337 in Electrical Timers
Brand	Honeywell Home
Brand Name	Honeywell Home
Color	Gray
Customer Reviews	4.5 out of 5 stars 1,207 Reviews
Global Trade Identification Number	00775264304033
Included Components	Industrial weekly/daily programmable indoor and outdoor timer
Item Dimensions D x W x H	3.86"D x 5.19"W x 9.29"H
Item Type Name	Industrial weekly/daily programmable indoor and outdoor timer
Item Weight	1.5 Pounds
Manufacturer	Aube by Honeywell Home
Manufacturer Part Number	TI040
Manufacturer Warranty Description	3-year warranty.
Model Number	TI040/U
Number of settings	14
Product Dimensions	3.86"D x 5.19"W x 9.29"H
UPC	775264304033
Unit Count	1.0 Count

TI040/U Industrial Weekly/Daily programmable Indoor and Outdoor Timer, Gray

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