TANKLESS GAS WATER HEATER
OWNER'S MANUAL
“The English version”
www.cozyhotwater.com

This heater is compact and high efficient for it's size with many built in safety features. The main electronic components are made in Japan to insure consistent, reliable and durable performance.

This heater is not made for a small, closed bathroom installation with no outside vent. If you have a vent going out it is not problem. It can be used in RV's, bathrooms, kitchens, mobile and remote installations. Be able to have hot water where you need it.

These heaters really shine where they turn on for a few minutes then turn off, using no additional ongoing power. It is not recommended for radiant floor heating as you sometimes have to have it on for hours to get the floors initially hot. The water heaters have a 20 minute safety shutoff. If you really wanted to do radiant you could have it turn on with a small WalMart $30 garden water timer for 20 minutes than off for awhile, then back on.

You don't want to use these as a whole house hot water heater if your outlets are spread far apart. It would waste so much water waiting for the hot water to arrive. Water is going to be expensive in the future. If outlets are spread apart get two or more units. It doesn't matter if 10 things are connected just run one shower/dishwasher, washing machine at a time. They are only on when you are using them paying for themselves quickly.

These heaters start out being made for propane. For natural gas the orifice was changed to accommodate that. Ignore the LP marking on the side of the unit. The correct gas type is on the label on the outer box.

You don't need to send in a warranty card. Just save a copy of your invoice or give us the name on the invoice and we can track it here. You have a one year warranty. If you have any concerns it is always best and fastest to email rather than phone.

INSTALLATION
1. Attach unit to the wall. Expansion screws are included in the box. Eye level is good.
2. Connect ½” flex gas line. A shutoff line is for safety. Check for any gas leaks.
3. Connect cold water in. A shutoff valve for safety
4. Connect hot water going out. Use cpvc pipe rated for hot water.
5. Install double wall exhaust vent.
6. Install 2 “D” batteries. You can still take a hot shower when all the main electricity is out.
(You can also take off the water heater cover and install a 110v to 3v DC converter to the wires going to the battery compartment)
7. Turn on faucet. You will hear the gas igniter heating the water. You are ready to go.


VENTING:
The units are made for 110mm vent pipe which is about a 3½" vent. You can install a more commonly found in the USA 4" vent sealed with heat safe sealer. The galvanized pipe is much cheaper than the stainless steel pipe. Most people do a 90 degree out the wall. You don't need to go through the roof. Insulated foil insulation is a good preventative. Install a rain cap.
The units install vertically, where they can breathe, not under the sink in a tight enclosed space.
Keep away from curtains and flammable things.

BONUS INFO:
How much can they heat water? I have started with 50 degree water and had 131+ degree water come out. 104 degrees is a standard hot spa temperature. We have found that showers with a separate hot and cold faucet system (Home Depot $52) gave the hottest water. Units with a one temperature lever got to 97 degrees. If your shower doesn't get as hot is because your controls are letting in lots of cold water.

SAVING WATER:
One day they are going to be charging a bunch for water as it is getting scarce.
Install high pressure / low flow shower heads (Ebay $25). Get one with a flow regulator. If using really cold water you can slow down the water flow giving the heater more chance to heat the water. (We have people using these heaters where it is -40 below! I am still curious what they are doing living there?)
People have asked if this would fill up their 100 gallon spa bath tub. It would go for 20 minutes than turn off. You would have to turn it on again. I would like to say you are wasting a lot of water with a tub, unless you are using free rainwater. Look at my lux shower enclosures to entice people away from wasteful bathtubs. www.luxshowerplace.com

IN VERY COLD PLACES
Try and keep above freezing. If not possible or will be away for extended time drain the water with the water drain valve.

PREHEATING THE WATER IDEAS
If in a really cold place there are several ways to preheat the water.
1. Have an inside pressure tank that gives the water a chance to warm up before you need it.
2. Run a coil of black water pipe inside by your fireplace.
3. Coiled black pipe in your attached greenhouse. Cover with clear plastic to hold in the heat.
4. Store your free rainwater in a big black (no algae) water storage tank. Install a wire fence around it 2+ feet out. Fill with grass, sawdust, leaves, and more grass. Pour urine over it to make it hotter faster. Cover with a black plastic. You might be surprised how much this insulates it from the cold and heats it too.
* A pressure relief valve is a good idea for if it ever gets too hot.


INSTALLATION IDEAS
We have a tub/shower in our 12x54 greenhouse so we can take a hot shower even in the middle of a winter snow storm or at night with hundreds of solar powered twinkle lights.

We also have a unit in our garage. It is so nice to be able to clean up with hot water. \We even installed a kitchen counter and sink and oven so we can cook there if we want.

We had a basement that wasn't being used much. We added a shower stall, the hot water, a composting toilet and a cozy bedroom. It's a wonderful well used place now.


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