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 Is water heater safe to use?

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ozak
post Sep 11 2016, 10:46 AM

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QUOTE(Dwango @ Sep 11 2016, 08:22 AM)
For those who have phobia using water heaters due to safety issue, can avoid water heaters. Just buy a medium-sized pail to store water. Whenever you want to take a warm shower, just boil some hot water using a kettle and pour the hot water into the pail of water. Just use a small bucket for scooping up the water from the pail to take a shower.
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So phobia meh.

Install another rcd near heater is good enough.

Or use solar heater. But without the heater.
ozak
post Sep 11 2016, 06:56 PM

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QUOTE(Dwango @ Sep 11 2016, 10:59 AM)
Some people can have this phobia of electrocuted by these water heaters as there are cases.

Solar heater is only practical to be installed at landed property, double storey homes or something similar. Not feasible for condominiums or apartments.
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The feeling will be gone once you install additional rcd.
ozak
post Sep 11 2016, 06:59 PM

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QUOTE(sharethebest @ Sep 11 2016, 03:29 PM)
Individual RCD should be installed in wet area such as in the bathroom.  If too troublesome to install, buy instant water heater with built-in RCD or ELCB safety device.
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All the heater already have rcd. Don't think you can get a heater without it nowadays.

Rcd shouldn't install inside the bathroom. Humid and hot stim can corrode the contact and mechanism.
ozak
post Sep 12 2016, 01:30 PM

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QUOTE(idoblu @ Sep 12 2016, 12:14 PM)
for those with just a wall socket - i wonder if this helps
http://www.lelong.com.my/13a-rcd-elcb-safe...6-12-Sale-P.htm

user posted image
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Same function. But you can't use this for heater. Max amp is 10A or 13A.

I m using this.

user posted image

Slowly will change all the socket to this rcd type.

ozak
post Sep 12 2016, 02:08 PM

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QUOTE(idoblu @ Sep 12 2016, 01:46 PM)
This is nice! Where to buy?
Is it necessary to change all, whole house?
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Can get it from lelong. But no ready stock. Take some time to order. Not a common thing.

http://www.lelong.com.my/e8215drc-pieno-1-...7-01-Sale-I.htm

That depend your safety level. You can use on those socket that you use frequent. The electrical thing that you touch and outdoor.

I realize I have few rcd type in my home. Built in, double socket and this latest. I think I m phobia. dry.gif
ozak
post Sep 12 2016, 02:41 PM

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QUOTE(idoblu @ Sep 12 2016, 02:27 PM)
This MTIS what also dun have wan. Last time tried to buy from them before. Also Pieno range
Maybe See Wide got. Anyway my house all Pieno so matches very well, only thing expensive.
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I m using pieno also. biggrin.gif

But they are the fastest I can get. I order outside, take me a month. And mostly just don't want do. So get online lor.

Yup. Expensive. Just install at those socket that you have to touch everyday.

Since it is expensive, slowly replace lor.


ozak
post Sep 12 2016, 04:18 PM

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QUOTE(idoblu @ Sep 12 2016, 03:05 PM)
Maybe for hair dryer 🤔
Those breakers at the fuse box not enough meh?
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What we have in home and the fuse box is minimum safety level or pretty basic. We are not rich country. So the design safety is minimum to meet the std here. Otherwise you have to pay high house price.

Have you ask why people still die since the fuse box there.

Why the heater have a built in rcd or elcb if the house already have. Don't they want to save some cost? Can't the house rcd to the job?

Why people still die since the heater have rcd/elcb. And why the fuse box rcd doesn't kick in if the heater rcd/elcb fail to protect.


ozak
post Sep 26 2016, 11:02 PM

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QUOTE(sharethebest @ Sep 26 2016, 10:14 PM)
Dear Bros, 

I have just bought a Panasonic instant water heater DH-3 HT model and I am going to install
by this week. Just want to seek some advice whether the following cable is suitable for installation
from the 20A Junction Box.  The cable length from the junction box to the instant water
heater is about 2 feet. 

The PVC flexible 3 core cable is Keystone BS 2004  70/0.0076. 

Your input are very much appreciated.  Thank You.
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The wire can support up to 18A.

The heater max at 15A.

But I guess you not run your heater max. And not long length. So should be ok.

If you want safe, than get a 4mm wire.
ozak
post Jan 6 2017, 05:39 PM

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QUOTE(nanadeadbeat @ Jan 6 2017, 04:45 PM)
Ozak bro, i am looking for water heater so i came through this thread.

After some survey some of the sales mention panasonic using mechanical type ELB.

However i did not found any RCB in the heater.

In this case,  is this Panasonic Heater safetier than those normal electronic type ELB like Alpha? (of course i will change every 5-6 years, what i means in technical way)

From the description, does it include RCD?

user posted image
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Mechanical is definitely safer and more reliable than electronic.

All the house here either RCD or ELCB is using mechanical type for the electrical short circuit trip.

Like your house, how long is your RCD/ELCB run without change?
ozak
post Jan 8 2017, 10:32 PM

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QUOTE(kb24 @ Jan 8 2017, 10:18 PM)
Hi i just install water heater today but during usage of heater, i heard my main mcb has buzzing sound. When turn off heater, the buzzing went off. Is it normal? Thanks
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Change the MCB.

The MCB contact is dirty.
ozak
post Feb 5 2017, 03:47 PM

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QUOTE(amenlo9 @ Feb 5 2017, 02:36 PM)
What type of water heater to buy if i want connect and supply hot water to bathtub?
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For bathtub size, you need a tank heater or solar heater.
ozak
post Feb 5 2017, 10:40 PM

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QUOTE(amenlo9 @ Feb 5 2017, 09:11 PM)
I think tank heater for whole house supply. I just need hot water in master bathroom for shower and bathtub. Found these common point of use heater from oversea website

http://m.homedepot.com/p/EcoSmart-2-5-Gal-...I-2-5/205610802
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You know how big is your bathtub? How much hot water do you need to fill up the bathtub?


ozak
post Feb 6 2017, 09:13 AM

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QUOTE(idoblu @ Feb 5 2017, 10:56 PM)
You need something like this - http://www.joven-electric.com/product_main...p?category_id=1
At least the 38L tank
Maybe 50L would be better if you gonna use it to fill your tub
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Wonder is it enough or not. hmm.gif

I google the bathtub capacity. Typical size can hold between 132L to 190L of water.

Put it at 140L since you want to submerge into the hot water.

A normal storage heater will heat to 70c with 3kw. Time to heat is 45min for 50L. (taken from Joven spec)

With a 50L hot water at 70c and mix to 35c require 50L of cold water.

That sum at 50L+50L =100L hot water at 30c. That is short of 40L. You need to boil 2x in order to enjoy. Normally comfort onseen temperature is 35c to 38c.

So 2x boil will take 45min x 2 = 1.5hr.


If let say using Instant heater taken the spec from Joven 3.3kw and a flow rate at 4L/min.

To fill up 140L of hot water, will take 140L / 4L = 35min.

Might be longer time if require higher temperature with higher flow and lower temperature.

And instant heater cannot run continues at full heat. Require to stop at 30min interval.
ozak
post Feb 8 2017, 10:01 AM

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QUOTE(idoblu @ Feb 7 2017, 09:00 PM)
that link you gave doesnt say how many litre of water that tub can hold
anyway for joven storage heaters you can see at the same shop = http://www.ewarehouse.atkc.com.my/index.ph...joven%20storage
the prices between each capacity is not a big difference

this storage heater is normally install above your bathroom ceiling board. each bathroom one heater. for bathroom with only shower, a 25L tank is enough
you need to find out if your bathroom already have copper piping for hot water and also electrical point for the tank. Also find out how much ceiling space you have for the tank to fit up there

you said you are buying a new tub, are you replacing or adding it in?

I only turn on my heater just before I go in and shower and off it once I am done or after the next person is done. It always have left over hot water inside the tank so you dont really need to like wait 20 mins for water to heat up. Only the first time you use it, you need to wait.
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But using for bathtub, that consume a lot of hot water. Probably drain out the whole tank and more.

So everytime must boil in full load again.

I think better use solar heater. That save a lot of bill with bigger tank.
ozak
post Feb 8 2017, 11:00 AM

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QUOTE(idoblu @ Feb 8 2017, 10:08 AM)
not everyday we use bath tub lo....like myself, 10 years also never use once  laugh.gif
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In the house you don't want enjoy. But go holiday and stay hotel, you want to use the bathtub.

Actually out climate is not suitable to have a bathtub. The hot weather doesn't make us to enjoy the onseen like in japan and western. Unless you install a aircon in the toilet. tongue.gif

Another reason is our bathing culture. We don't have the culture to spend long time on bathing. When you young, your parent will nagging if too long in the toilet. So you get "train" to be fast out of the toilet. Miss my many masturbate time. biggrin.gif
ozak
post Feb 8 2017, 11:02 AM

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QUOTE(weikee @ Feb 8 2017, 10:50 AM)
What happen if drain at night?  still need to switch on backup heater, and is even slower for solar backup heater to heat the water.  BTW, Solar heater will not get hot water as hot as Storage (maybe micro solar will)

Unless the owner bath tub in the morning biggrin.gif
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Well the solar heater should be more than enough for the bathtub I guess.

Maybe have some left over for another bath.

Hence, the calculation is important to determine the tank capacity. Once you get the wrong size, habis.
ozak
post Feb 9 2017, 11:44 PM

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QUOTE(Richard @ Feb 9 2017, 11:03 PM)
The pressure release valve should have prevented the explosion..

This is why this forum is so important to disseminate information to make homeowners aware of the risk of badly maintained equipment in their homes..

Functional aesthetics comes with a cost..
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For normal household people, there wouldn't know about this. And don't think the manufacturing will tell you when need maintenance.

Till the unit spoil.
ozak
post Feb 10 2017, 09:20 AM

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QUOTE(weikee @ Feb 10 2017, 09:14 AM)
Most likely (guessing) the storage heater is some "chap palang" brand.  A good brand will have minimal 2 failsafe features inside.

And next is user need to practice switch off after use. This is passive safety.
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So far have you check that safety device? Is it in working condition.
ozak
post Feb 10 2017, 05:05 PM

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QUOTE(amenlo9 @ Feb 10 2017, 04:42 PM)
another issue is normal those heater installed on top of the ceiling. How we able to check and view the indicator of the tank?  dry.gif
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No need la.

Nobody will see it.

Just estimate the time when you switch ON.
ozak
post Feb 16 2017, 08:29 AM

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QUOTE(sharethebest @ Feb 15 2017, 09:50 PM)
This one is quite costly

user posted image
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How you intend to install it?

This type is din rail, db box type.

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