EZ TANKLESS 202 User manual

ISO 9001-Certified Large Capacity Automatic Gas Water Heater
USER'S MANUAL
EZTANKLESS MODEL 202

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This gas water heater is ISO9001 certified.
Thank you for purchasing our large capacity automatic gas water heater.
Please thoroughly read this Manual before installing and operating and
keep for future reference.
Contents
Special Advice ………………………………………………….2
Features & Benefits ………………………………………………….2
Specifications………………………………………………………….3
Parts Name……………………………………………………………..4
Installation Method…………………………………………………….5
Operation Method……………………………………………………..8
Cautions For Safety……………………………………………………9
Maintenance……………………………………………………………12
Accessories Table……………………………………………………..12
Trouble Shooting………………………………………………………13

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Special Advice
The combustion of the gas will consume a large amount of air and produce
Carbon Monoxide while the heater is working. NOTICE: if humans or
animals breathe too much Carbon Monoxide, it will cause danger, injury, or
even death. Therefore, the users are requested to install and use this heater
strictly according to this manual to avoid Carbon Monoxide toxicosis. The
manufacturer or its authorized distributors will not bear responsibility for any
damages resulting from installation and operation not in accordance with
this manual. If the user has any concernes or questions, please do not
hesitate to ask.
Features & Benefits
1. Automatic operation
Simply turn on the hot water tap or shower, and hot water will arrive.
When the tap is turned off, the flame will automatically go out.
Independent control of water flow and gas flow makes it easy to
adjust the water temperature.
2. Innovative design
Sleek shape and convenient to install.
Advanced energy-saving combustion technology greatly promotes
burning efficiency.
Ignites at low water pressure (35 PSI)
3. Complete safety functions
Sensitive IC flame sensor will cut off the gas supply if the flame goes
out unexpectedly.
Insufficient water flow pressure protection.
Anti-freeze function.
In case of no-water supply, the gas valve will automatically turn off.

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Specifications
Description Instant Gas Water Heater
Model EZ202LP EZ202NG
Gas Type L.P.G Natural Gas
Rated Gas Pressure 2800Pa 0.406 PSI
11.24 WC inch.
2000Pa
0.29 PSI
8.03 WC inch.
Hot-water Out-point Multi-point Hot-water Outlet
Combustion product exhaust Flue Duct 110mm diameter pipe
(4.33 inches)
Ignition Water Controlled Automatic Ignition
Power 2 “D” cells batteries (#1)
Safety Devices Flame-out Protection No-water cut-off Protection
Water Over Pressure Protection etc.
Suitable Water Pressure (35 ~ 125 PSI)
Connections
Gas Inlet G1/2 or G3/4 inch USA pipe
Cold-water
Inlet G1/2 inch USA pipe
Hot-water
Outlet G1/2 inch USA pipe
Appearance Dimensions (mm)
630x360x145 680x 400x 145

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Parts Name

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Installation
Before installation, contact the
qualified technicians at your
local gas dealer or gas
management department to do
the installation. Any random or
improper installation will affect
the safe use of the machine or
even endanger the users’ life.
If the water heater installation is
in a room with other ventilation
devices, it is strictly prohibited
to operate additional ventilation
equipment (like a stove hood or
ventilation fan) As this can
cause a back draft of the heater.
This is why we do not
recommend this type of heater
to be installed indoors of an
occupied building or residence.
Installation requirements
 Do not install the water heater
in bedroom, basement,
bathroom, kitchen or rooms
with poor ventilation. The
room for installation shall be
well ventilated and above
6m2 in area (212 Cubic Feet).
A ventilation hole as well as
an exhaust hole must be
drilled in the wall for proper
ventilation purposes. The
exhaust flue shall be installed
above the water heater, and
the ventilation hole shall be at
a level lower than the water
heater. (Fig.3)
The flame-check window of
the water heater should be at eye level (about 1.55m-1.65m above

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the floor. Fig.4), and always kept well away from inflammable liquids
and materials. (Fig. 5). No electric cables or equipment shall be
placed above the water heater. The heater shall be kept at least
400mm (16 inches) away from all electronics on sides and bottom.
Do not install the water heater where strong winds blow, or it can
cause flameout or incomplete combustion.
Installation Method
1. Installation
Drill holes in the wall according to Fig.6, Put an expansion bolt into the
upper hole and plastic gasket into the lower hole, mount the water heater
vertically on the upper bolt without inclination and tighten the lower holes
with expansion bolts.
2. Piping
L.P.G users are
recommended to use a
standard type regulator.
Gas Inlet
(1) After connecting the pipes,
check the connections with
soapsuds for gas leakage.
Water Inlet
It's better to use a braided
type flexible hose, or you may
use rigid pipe as a cold-water
connection. A water control
valve should be installed
before the water inlet (Fig.7).
(Note: There is a filter inside
the water inlet, do not remove
it while installing).

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Hot Water Outlet
Remove the drain valve first
to avoid breaking the
anti-frost screw. If connecting
the hot water outlet directly to
the shower, you can use
tubing or rigid pipe. When
installing the control valve or
tap to the hot water outlet, or
installing the shower with
control tap, do not use pipes
made of materials
pressure-unendurable or
temperature-unendurable,
such as plastic or, aluminum
pipes.
3. Battery Installation
Do not confuse the positive
and negative ends of the
batteries (See Fig. 8).
4. Flue Duct Installation
As this water heater is flue duct
type, the waste air exhaust
pipe must be installed.
Basic requirements:
Flue duct inner diameter:
φ110mm.
The main body of the flue
duct shall be made of
rustproof material.
The horizontal part of the flue duct shall have a 1:100 down
inclination, and there shall be aφ10mm hole at the bottom of the
vertical part of the duct outside the room, for the purpose of draining
water droplets and condensation.
The outlet of the flue duct shall have a windproof cap, which should
not be clogged.
Installation method:
Drill proper holes on the wall according to the right dimensions of the
heater (See Fig. 9).
Fig. 9

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Operation Method
1. Preparation before Ignition
Make sure the type of gas used complies with that stipulated on the
label. Natural gas or Propane
(LPG)
Turn on the gas inlet valve.
Turn on the water valve (make
sure there is water flowing out,
the green indicator light will turn
on with a "clicking" ignition sound.
The burner is ignited and hot
water flows out instantly. If the
water pressure is low, or the
power is not connected, the
water heater will not operate
normally.
After initial installation or a
change of gas cylinder, air may
remain in the gas pipe. It may
require several ignition attempts
to bleed the air out of the pipe
before the heater can be ignited.
If a problem comes up after
normal operation, turn off the
water immediately. To prevent
the possibility of an explosion,
allow 10-20 seconds for gasses
to clear before attempting to
re-ignite the heater.
Test water temperature with your
hand before use to avoid
scalding. (Fig.10)
Turn off the gas valve after each
use. (Fig.11)
In cold winter, the water heater
must be drained after each use
as follows:
1) Turn off the water control valve.
2) Turn the water flow control knob to
"low" position.

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3) Remove the drain cock. (The drain cock is a bolt connected to the valve.
Take it off by turning it counter-clockwise to drain the water completely).
Cautions For Safety
■Gas Leak Prevention
It's best to install a gas leakage-warning and carbon monoxide
detection device.
Do not forget to turn off the gas valve after use (Fig. 11)
Always check all the gas pipe connections with soapsuds to see
whether it has gas leakage. In case of gas leakage, shut off the gas
supply and open the windows immediately. Under such condition,
ignition, switching on/off the electric power supply are strictly
prohibited to avoid and explosion and fire. (Fig.12)
Never mix gas types, use the correct fuel, natural gas or Propane
(LPG)
Check the gas line regularly as it may age and crack after long
periods of use. Replace if cracked tubes are found. Under normal
operation, the gas tube should be replaced yearly.
For L.P.G user, if the flame of the heater is not stable, it may be
caused by the breakdown of the pressure reduction valve connected
to the outlet of the gas tank. (regulator) In that case, stop using the
heater immediately and contact a service technician.
■Fire Accident Prevention
Make sure that the flame of the heater has extinguished before
leaving the room or going to sleep.
Turn off the main gas valve and the water inlet valve in case of a
water shortage.
Do not place inflammables like towels or clothing onto the heater or
exhaust. (Fig.13)

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Do not place inflammable
materials, explosives or
volatile materials near the
heater. (Fig.14)
For L.P.G users, do not place
the tank tilted or inverted,
otherwise the liquid in the gas
cylinder may flow into the
heater, and cause a fire or
explosion accident.
■Carbon Monoxide poisoning
Prevention
The burning of gas consumes
large amounts of air and
produces some amount of
poisonous gases like carbon
monoxide. Thus, the heater
must be fixed in a very well
ventilated location.
As this water heater is a large
volume flue type, the flue
duct must be installed to
exhaust the combustion
by-products out of the room,
keeping the air inside the
room clean.
The heater must be installed
vertically.
■Prevent Eye injury
Keep eyes away from the
flame indicator window at a
minimum safe distance of
300mm (1 foot) during ignition. If the first attempt of ignition fails, wait
10-20 seconds for the gasses to clear before the next attempt.
■Freezing Prevention
At low temperatures, completely drain the water remaining in the
heater after each use. Otherwise the water may freeze and expand
which may damage the heater.
■ Dealing With TheAbnormal Conditions
● Stop the heater during high wind conditions Wind may blow into the
flue pipe (exhaust) and may render the heater inoperable.

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● In case of abnormal burning (e.g. flame back, flameout, yellow flame
or black smoke, etc.), an unusual smell, noise or other abnormal
matters, keep calm and turn off the gas valve and contact
EZTANKLESS.
■ Preventing Scalding
● After repeated use, or when the water temperature control knob is
still at “high” position, be careful of the temperature of the water at the
beginning and ending of each use, as it may remain high and scald
your skin.
● During or right after use, do not touch any part of the heater other
than the control knobs, especially the parts around the flame check
window and exhaust.
■The Following Things Are Normal
● When the water pressure is lower than 35PSI, the heater may not
ignite.
● If the drain valve is dripping the water pressure may be too high. The
drain check-valve will release the water so as to reduce the pressure to
protect the heater.
● When the heater is supplying a flow of hot water that exceeds it’s
designed maximum abilities in GPM, the hot water temperature will be
reduced.
● If the heater is operated for more than 20 minutes, the flame will
automatically turn off due to the 20-minute timer safety protection
function. To re-set the timer, simply turn the faucet off and then back
on.
■Maintenance
● Check the gas tube/pipe regularly for any defects. Contact a service
center if you have any doubt.
● Clean the water filter regularly or install an in-line filter on the inlet
pipe.
● Check for water leaks regularly.
● If the flame turns from blue to yellow with black smoke, turn off the
heater and contact the service center immediately for help.
● Every six months have your heater professionally serviced.
● Always keep the heater clean.

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Accessories (contents of box)
Item Names QUANTITY
Water Heater 1
Mounting Screws 4
Manual 1
Gas Connection (with washer) 1
Gas Inlet Connection (with rubber seal gasket) 1
Expansion Bolts (M6) 1
Trouble Shooting
Symptoms
Reasons
The flame goes out No ignition after
opening water
valve
Deflagrate in ignition Yellow flame Abnormal smell Bumpy noise in
ignition
Low temperature of
water at “high”
position
High temperature of
water at “high”
position
Burning after closing
the water valve
Indicator lights on
(red)
Remedies
Gas valve not open 
Turn on main valve or
replace the gas
Gas valve half open 


Turn on the main valve
Air in the gas pipe 
Run water until air
clears the gas system
and repeat every 20
seconds until ignition
Unsuitable
Gas
Pressure
High 


Contact the repairer to
check the gas pressure
valve
Low 

Cold water valve closed 
Turn on the water
supply main valve
Freezing 
Use after de-frosting
Inadequate water supply 


Clean the filter and then have a professional
check the water pressure
Water temperature
control mistake 

Adjust the settings
properly
Insufficient fresh air 

More ventilation is

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required
Power shortage 
Replace the batteries
Burner clogged 


Contact the service
center
Heat exchanger clogged 


Contact the service
center
Water control unit failure 



Contact the service
center
Ignition needle
movement 

Contact the service
center
Continuous 20 minutes
operation 
Re-ignite by turning the water valve off and then
back on
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