Marey GA16ETL Instruction Manual

02

ACCEPTABLE VENT PRODUCTS

START UP AND TESTING

INITIAL START UP

REFERENCE

SYSTEM SPECIFICATIONS

DIMENSIONS

NAMES OF MAJOR PARTS AND COMPONENTS

TEMPERATURE INCREASE CHART

CUSTOMER SERVICE

OTHER PRODUCTS

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WARNING: If the information in these instructions is not followed exactly, a fire or
explosion may result causing property damage, personal injury or death.Do not
store or use gasoline or other flammable vapors and liquids in the vicinity of this or
any other appliance.

WHAT TO DO IF YOU SMELL GAS:

- Do not try to light any appliance.

- Do not touch any electrical switch; do not use any phone in your building.

- Immediately call your gas supplier from a neighbor's phone.

- Follow the gas supplier's instructions.

- If you cannot reach your gas supplier, call the fire department.

- Installation and service must be performed by a qualified installer, service agency
or the gas supplier.

- Water heater for other than recreational vehicle installation only.

IMPORTANT WARNING! There is water contained in the coils of your water heater
at all times. If your water heater is exposed to freezing temperatures, the water in the
coils could freeze, causing a break in the heat exchanger of the unit, or the supply
and return lines. This kind of damage will result in water running freely into the space
where the water heater is located, with can cause flooding. If your water heater is
installed in a geographic location that sees very low sustained temperatures, you
MUST install a backflow preventer on your heater's vent pipe. This will ensure that
cold air cannot fall down into the water heater and cause freezing damage. DO NOT
install this water heater where it may be subjected to a freeze. If your water heater is
in an area where freezing is a possibility, you must turn off the water to the heater
and drain it of any water by using the valve stem at the bottom of the unit and
disconnecting the warm water line. Leave the valve stem and the warm water line
disconnected until you intend to use the water heater.

Thank you for purchasing a GA16ETL Gas Tankless Water Heater. In order to
ensure proper installation, safe operation, and long life, please carefully read these
instructions. Installation should only be completed by licensed professionals. The
use of professionals ensures the installation is in full compliance with all required
building, plumbing and electrical codes.

KEEP THIS MANUAL for future reference. This booklet includes useful information
about the product, maintenance requirements and the details of your product
warranty.

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READ AND FOLLOW ALL INSTRUCTIONS.

When using this equipment, basic precautions should always be followed.

Safety Definitions

This symbol is the safety alert symbol which is used to alert you to
potential hazards that can kill or hurt you and/or others.

Indicates an imminently hazardous situation which if not avoided will
result in death or serious injury.

Indicates a potentially hazardous situation which if not avoided
could result in death or serious injury.

Indicates a potentially hazardous situation which if not avoided
could result in minor or moderate injury. It may also be used to alert
against unsafe practices.

- This heater is designed only for the heating of water and should not be used for
other applications or used to heat any other media.

- Never use a fuel gas that is not listed on the nameplate as compatible with the
water heater. Abnormal combustion or a deflagration may occur which can cause a
serious accident including damage to the heater.

- Do not use this appliance if any part has been under water. Consult a qualified
service technician to inspect the appliance and make any required repairs prior to
installation and operation.

- This water heater is designed for indoor mounting. Never mount it outdoors.

- This equipment should be installed in an area where water leakage from the unit or
connections will not result in damage.The manufacturer is not responsible for any
damages resulting from leaks.

- Only connect gas and water as instructed. Incorrect or reversed connections will
cause equipment damage.

- Do not over tighten connections or equipment may be damaged.

DO NOT use a fuel gas that is not listed on the nameplate as

compatible with the water heater. Abnormal combustion or a
deflagration may occur which can cause a serious accident.

DO NOT use the unit if the vent piping has been damaged or
altered in any way including cracking, separation, rusting,
melting, etc. Improper venting may cause a buildup of Carbon
Monoxide (CO) which can cause brain damage or death.

·If the water heater needs to be installed, moved, or serviced only utilize licensed
professionals. The use of professionals ensures all work is in full compliance with
required building, plumbing and electrical codes.

·

- Keep the area around the appliance clear and free of flammable materials such as
cloth, wood, aerosol cans, paper, gasoline, etc.

- When using hot water for a shower or bath always check the water temperature
before entry to avoid being scalded. Obey local codes for the maximum water
temperature setting allowed. Water temperatures over 125ºF (52ºC) can cause
severe burns or death from scalds. Households with small children, disabled or
elderly persons may require a setting of 120ºF (49ºC) or lower.

- Do not install in areas that are subject to vibration.

- This equipment may not be operated without the vent pipe properly connected. The
exhaust pipe must not terminate in an area where the exhausting vapor or collecting
condensate could create a hazardous situation or cause property damage. Exhaust
gases must be vented out of the building in compliance with all building codes.

- The exhaust piping is very hot during and for a period after use. Do not touch the
pipe.

- Ensure that snow, ice or other debris does not block the inlet or exhaust pipes.

- Regular housekeeping should be done in areas around the heaters to prevent
insect intrusion and possible equipment malfunction.

- The unit should be serviced on a routine basis to ensure optimum performance.
Service needs will vary based on local water conditions including acidity, alkalinity,
hardness, etc.

- Freezing temperatures will cause damage to the heater. Install in locations where
freezing temperatures are not reached and follow procedures to drain the unit if it will
be out of service for a period of time.

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- A 120 V / 60 Hz power source should be used. Fire, electrical shock or damage to
the water heater may occur if an incorrect power supply is used.

- This appliance is equipped with a three-prong grounded plug for increased
protection against electrical shock. Ensure the plug is properly inserted into a clean,
dry outlet that complies with all electrical codes. Only insert and remove the plug
using the plug head and never use a wet hand to plug or unplug the power plug.

- Any alterations to the appliance will void the warranty.

Normal Operation

This section of the manual instructs an owner on routine operating procedures and
assumes that the water heater has already been installed, tested, and approved for
operation. Initial start up requirements is detailed in the “Installation” section of this
manual.

Routine Start Up

Follow this procedure for a heater that has been out of service.

1. Ensure all drain plugs are installed in unit.

- GAS16LPETL gas tankless water heaters provide an efficient reliable supply of hot
water.

- The temperature can be adjusted between 95ºF and 149ºF (35ºC - 65ºC).

- Only a small amount of water and a low water pressure (15psi) are required for the
unit. Unit requires 0.67 gpm (2.5 l/min) to enable the unit. Unit stays in operation until
the flow drops below 0.53 gpm (2 l/min).

- The burner ignition is electronic. The unit has no pilot light and consumes no gas
when the heater is not being used.

- Air is brought into the unit from outside, efficiently burned with the appropriate
source of fuel and then exhausted externally.

- The unit's integrated control system constantly monitors the temperature of the
water being produced and adjusts the burner accordingly to deliver a stable supply
of hot water.

- The unit is highly flexible and provides hot water over a wide range of flow rates and
incoming water temperatures across the capacity range of the unit.

- GA16ETL heaters include a digital functionality that allows owners to control hot
water consumption and conserve water.

- Multiple protective functions are included such as no-load heating prevention,
automatic shutdown in case of accidental flame out, automatic pressure relief, etc.
to make the appliance both safe and reliable

2. Ensure all hot water use points (faucets, etc) are closed.

3. Open the water inlet valve.

4. Open a hot water faucet to confirm water flow and then close the faucet.

5. Open the fuel gas valve.

6. Plug in the unit, The message “CL” will be displayed indicating “Cold” state.

7. Press the “ON/OFF” key to turn on the unit.

8. Set temperature (see “Temperature Control” section of this manual).

- In the event of a disruption in operation, a failure code is displayed and an alarm
sounds an alert.

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Control Panel

“Water valve” - Indicates one of the following three states:

The Control Panel and display are used to adjust the operational settings of the unit
as well as give information about the current state of operation. The following
illustration shows all possible symbols and signs that may appear in various states
of operation. In operation only the symbol or sign corresponding to the actual state
will appear on the control panel display. The water heater is in an operating state
when the hot water temperature is shown.

Failure mode displays
when a failure occurs,

When the water

temperature is above

95° F (35° C) the

lamps are lit one by

one from bottom to

top.

temperature display
mode is switched to
failure display mode.

Switch between
metric and English
units: Press and hold
the “+” and “-”keys at
the same time for
about 3 seconds.

Description of the
mode key F3 current
water quantity F4
preset water quantity

1. No light indicates water heater is operating normally.

2. Blinking: Indicates there is no water flow through the water heater or the water

flow is less than 0.66 gallons per minute (2.5 liters per minute)

3. When on and remaining lit, the firepower of the water heater is operating at either
the minimum or maximum operating point. The actual water temperature may not
reach the preset temperature. The water flow rate needs to be adjusted so the unit is
operating within its capacity range. This will allow the desired temperature to be
reached.

“ºC/L” - Indicates metric units are being displayed (degrees Celsius, liters)

“ºF/G” - Indicates English units are being displayed (degrees Fahrenheit, gallons)

“Up + / Down ” keys - Used for setting the water temperature and water quantity.

“Mode” key - Used to Set (F4) the water quantity or Display (F3) the water volume
already delivered.

“ON /OFF” key: This button enables or disables the water heater. In the “ON” mode,
the temperature set point is displayed. The factory default temperature setting is
107ºF (42ºC). In the “OFF” mode, “CL” (Cold) is displayed.

TEMPERATURE CONTROL

Set the Desired Temperature

CONTROL PANEL INDICATIONS

LED display

1. Indicates the “Temperature Set Point” when blinking. Displays the “Actual

Temperature” when the display remains lit.

2. It displays both the “Preset Water Quantity” and the “Actual Water Quantity”.
“Combustion” - When lit indicates that the water heater is operating and burning gas.

1. The temperature adjustment range is 95ºF - 149ºF (35ºC – 65ºC).

2. Press the “ON/ OFF” key. The temperature display unit lights up and displays the

current temperature set point. The factory default set point is 107ºF (42ºC).

3. Press the “UP” or “DOWN” key to set any desired temperature between 95ºF
(35ºC) and 122ºF (50ºC). The temperature set point goes up or down by one degree
with each press.

4. To set a temperature above 122ºF (50ºC): Press and hold the “UP” key
continuously for about 4 seconds until 131ºF (55ºC) is displayed.

5. Note: When the temperature is above 122ºF (50ºC), each press of the “UP
(DOWN)” key causes the temperature to go up (down) by 9ºF (5ºC).

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6. When the desired temperature is set above 122ºF (50ºC), the temperature
display blinks for approximately 4 seconds before the display switches to show
actual water temperature.

3. Displayed volume: Please note that the readout indicates the water quantity
divided by ten (10). Example – if the display shows “10”, this correlates to a volume
of 10x10 = 100 gallons (English unit mode) or 100 liters (metric unit mode).

7. Along the left side of the temperature display, a series of bars indicates the level of
the temperature set point. At each 9ºF (5ºC) increment, an additional bar lights.
When the set point is above 122ºF (50ºC), the first red bar appears indicating the set
point is in a zone where a scalding hazard exists.

8. The heater will retain the temperature set point unless there is a loss of power.

9. After the temperature is set, open the water valve and observe. The “Combustion”
indicator should light indicating the unit is operating normally.

SCALD PREVENTION

- Water temperatures over 125ºF will scald and
can instantly cause severe burns or death!

- Children, disabled and elderly are at highest
risk of being scalded

- Always test the water temperature by feeling
the water prior to entering a shower, bath, etc.

- Obey all codes regarding temperature set
point. Contact a licensed plumber or local
plumbing authority for clarification or additional
information.

4. Adjust the “Volume Set Point” by pressing the “UP” or “DOWN” key briefly. Each
press corresponds to a change of 10 gallons of volume (English unit mode) or a
change of 50 liter (metric mode).

Example 1: English unit mode: The digit 7 is currently being displayed. This
indicates a set point of 70 gallons. Pressing the “UP” key once changes the
set point to “8” indicating a water quantity of 8×10 = 80 gallons as the new set
point.

Example 2: Metric unit mode: The digit 25 is displayed. This indicates a set
point of 250 liters. Pressing the “UP” key once changes the display to “30”
indicating a water quantity of 30x10 = 300 liters as the new set point.

5. When the water heater is discharging water to the bathtub and the volume set
point is reached, the alarm on the remote controller will sound an alert for about 10
seconds.

Note: The output of hot water will not stop automatically.

IMPORTANT! The volume measurement only keeps track of the
water volume that passes through the water heater. For example, if hot water going
to a tub is combined with cold water, the volume computed would not be
representative of the total amount that may have filled the tub. This could lead to an
overflow or damage!

Monitoring the Volume Delivered

Press the “MODE” key. The message “F3” will be displayed. Press the “UP” (or
DOWN) key briefly. The mode will switch from temperature display mode to water
quantity display mode. The water volume already delivered is displayed. Example:
“5” = 5×10 (50L or 50G).

Set a Desired Volume

1. The volume display range is 0-250 gallons when system is set to use English units

or 0-950 liters when in metric mode.

2. Press the “MODE” key briefly to display the message “F4”, then press the “UP” (or
“DOWN”) key. The mode will switch from temperature display mode to water
quantity display mode.

Power Outage

In the event of a power outage or if the unit is unplugged, settings are restored to
their factory default values.

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OPTIONAL WIRED REMOTE CONTROL PANEL (GA16ETL)

The heater may be controlled by a wired remote control (optional). The controller
can be located near a bath, shower or other location. Figure - Wired Remote Control
Panel

to the system. At any given time, one of the control panels can become the “priority”
controller. The priority controller becomes the master temperature control device for
the system. To set priority:

Method A:

Remote Control Panel Indications

“Combustion” - When lit indicates that the water heater is operating and burning gas.

“Override” - When this indicator light is on. The wired control panel can change the
temperature set point.

“ºC/L” - Indicates metric units are being displayed (degrees Celsius, liters).

“ºF/G” - Indicates English units are being displayed (degrees Fahrenheit, gallons)

Remote Control Panel Functions (GASETL)

1. Turn off the override if it is set on another controller. Press the “Override” key to
release priority. The Override indicator light will go out.

2. Select the new controller to take control. Press the “Override” key on the wired
operation panel which should have priority. The “Override” indicator will turn on and
the temperature set point may be adjusted from this controller.

Method B:

Another way to gain priority is to press the “ON/OFF” key twice on the units
operation panel. The first press will shut the unit off, which will invalidate the
Override ownership of the remote, and the second press will reactivate the unit
which will reinstall factory defaults and set the unit's panel the Override position, the
“Override” indicator will turn on. When unit is in standby, the first wired controller to
activate the unit will have priority and the Override indicator will turn on.

- Change the Temperature Set Point: First, enable “Override” or priority control for
this remote control. Adjust the temperature using the “Up” and “Down” arrows.

- The temperature may be adjusted in one degree increments between 95ºF (35ºC)
and 122ºF (50ºC).

Extended Outage Procedure

- Remote shut down: If the water heater needs to be stopped when it is operating,
press the “ON/ OFF” key. The displayed hot water temperature disappears. The
water heater has stopped operating. The “Combustion” indicating light will go out.
The water flow is not controlled by the remote. The water flow will continue until the
faucet or shower is turned off.

Switch between metric and English units: Press and hold the and keys at
the same time for about three seconds.

- Override (Priority) Control: Up to three remote control panels may be connected

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If a heater will be out of service for an extended amount of time, use the following
procedure to protect the unit.

NOTES

- Cold air may enter the unit through the air intake or the exhaust system. Take
precaution for extended shutdowns even if unit is installed indoors in an area that
does not allow direct exposure to freezing temperatures.

- Temperatures at or below 32ºF (0ºC) can cause permanent damage the unit and/or
the piping system due to freezing.

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- After a power outage, all settings return to their factory default values.

The heater and water within the unit may be very hot. Allow time for
the system to cool and use caution when draining to minimize risk of
injury.

1. Shut down the water heater by pressing the “ON/OFF” button. “CL” will appear
indicating “Cold” state.

2. Close the fuel gas valve (1).

3. Unplug the power cord (3). Use dry hands. Exercise caution and only unplug by

grasping the plug head and pulling. Note, all factory settings will be restored next
time unit is re-powered.

7. Open the drain valve plugs and completely drain the water heater.

8. Continue draining to empty the whole hot water system.

Note: Freezing temperatures below 32ºF (0ºC) can cause permanent damage to

the heater and/or the piping system.

9. Reinstall the drain valve plugs and close the hot water faucets.

10. To return a unit to operation, please refer to “Routine Start Up” found in the

Operating Instructions section of this manual.

4. Close the water inlet valve. (4)

5. Open all hot water faucets.

6. Obtain an appropriate container to collect the residual water from the system.

Prevent water from being discharged on the floor to avoid damage.
Prevent water contact with any electrical source in the vicinity

Freezing Damage Potential and Precautions

Freezing temperatures can damage the water heater and/or water piping. Freezing
water expands rapidly and can create tremendous mechanical forces. Mechanical
damage and pipe ruptures can result from only brief exposure to freezing
temperatures.

For best results, completely shut down the system by following the Extended
Outage Procedure section of this manual.

In cold regions, insulating material or heat tracing can be used to protect pipes and
fittings. Please consult your dealer if necessary.

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