Marey GA5FLP User manual

Keep this manual with you after your unit has been installed, you

may need it for further technical information.

GAS TANKLESS WATER HEATER

INSTRUCTION MANUAL

U.S.A+1 (855) 627-3955 PR +1 (787) 727-0277www.marey.com

GAS 5 & 10 FLOW

GA5FLP - GA5FNG | GA10FLP - GA10FNG

Congratulations! You've just purchased a new Marey Gas Flow tankless water

heater and will soon begin to enjoy the benets of "going tankless."

The availability of instant hot water, combined with the unit's outstanding energy

eciency and space saving design, will quickly convince you that you've made the

best decision for meeting your home's hot water needs.

Take the time to thoroughly read and understand this safety and installation manual

in its entirety before you attempt to install your new Power Gas tankless water

heater, as it contains important safety tips and instructions.

Please carefully read all instructions and warnings. Should you have any questions,

please visit www.marey.com for installation videos and FAQ. Please keep this manual

for future reference.

WARNING: If you are not familiar with basic plumbing and electricity, we highly

recommend that you employ the services of a professional to assist you with this

installation. Under no circumstances should you attempt to install, repair, or disas-

semble the Marey Power Gas water heater without rst shutting o any gas

supplied to the unit.

INDEX

QUICK START GUIDE

PACKING LIST

IMPORTANT WARNINGS

FUNCTIONS AND FEATURES

INSTALLATION

OPERATING INSTRUCTIONS

INSTRUCTIONS FOR DAILY MAINTENANCE

CONSTRUCTION AND PART IDENTIFICATION

EXPLODED VIEW

TECHNICAL PARAMETERS

TROUBLESHOOTING GUIDE

CUSTOMER SERVICE

Working with gas can be dangerous. If you are not familiar with local building codes

and basic gas plumbing practices please employ a professional to install your water

heater.

1. Securely mount your water heater to the wall in an appropriate location using the

supplied hardware.

2. Install the venting (4" for the 5L) per local building codes and the instructions

supplied.

3. Connect the gas lines (all connections are ½"). Use yellow Teon tape at threaded

connections. Check carefully for gas leaks using soapy water and correct as necessary

before proceeding further.

4. Connect the water lines (all connections are ½"). Use ½" or ¾" pipe or tubing for the

water supply and return. If water pressure or ow rates are questionable use ¾" lines

to ensure maximum ow. You MUST use copper, CPVC or appliance tubing intended

for use in hot water applications for all hot water lines.

5. Check for and correct water leaks as necessary.

6. Install the batteries in the battery compartment. Be sure the polarity of the batter-

ies is correct.

7. Turn on the faucet and adjust the water and gas settings on the water heater as

needed for your specic environment and comfort. **USE CAUTION NOT TO GET

SCALDED WHILE ADJUSTING YOUR SETTINGS** Remember that more water ow will

usually result in less heating, and vice versa. Higher gas settings result in more heat-

ing, and vice versa.

8. Begin enjoying instant, energy ecient hot water for years to come!

Disclaimer: This document is intended as a quick reference only and does not contain

all of the important safety warnings and other information necessary to safely oper-

ate your heater. For a complete list of safety warnings and instructions please

reference the instruction manual before operating your water heater.

WARNING

POWER GAS MODELS

QUICK START GUIDE

PACKING LIST

1. WATER HEATER - QTY 1

2. OPERATING INSTRUCTIONS - QTY 1

3. MOUNTING SCREWS - 4 SETS

- You MUST install this water heater according to all directions and specications con-

tained in this manual. Failure to properly install the heater can result in property

damage or severe injury or death by burning, explosion, or asphyxiation due to carbon

monoxide.

- You MUST check the exhaust ue for obstructions at the initial installation and at least

annually thereafter.

- You MUST check all connections for gas leaks with soapy water before ring the unit.

This must be done at the initial install and after every propane bottle change if using an

LP model. If you detect a gas leak of any kind, DO NOT re up your unit.

- You MUST check for gas leaks by smell. Understand that LP is heavier than air and may

sink to ground level. If you detect a gas leak of any kind, DO NOT re up your unit.

- You MUST observe the unit in operation for several cycles before leaving it unattend-

ed.

- Unit MUST be hung vertically, with the water and gas connections at the bottom and

the exhaust at the top.

- You MUST use a carbon monoxide detector in conjunction with this, or any, gas burning

appliance.

- Do NOT expose the water heater to strong wind (including that from fans) or rain.

- Do NOT install the water heater near ammable or volatile substances. Do not handle

or store these substances near the heater (gasoline, acetone, motor oil, paint thinners or

any other ammable or volatile substance).

- Do NOT use tubing or piping that is aging or cracked in any way.

- Do NOT use this appliance with any type of gas other than that indicated on the data

plate located on the side of the unit. Death or severe injury may result.

IMPORTANT WARNINGS

- Do NOT install the water heater in a sealed room or in a room with poor air circulation.

- You MUST install the exhaust pipe to properly discharge the exhaust gases.

- Do NOT block the exhaust pipe or the air inlet at any time. This can cause incomplete

combustion and can lead to gas poisoning.

- When the water heater is in use, do NOT touch the body of the heater. Touch the

knobs only, as the body of the heater can become very hot to the the touch.

- Prevent scalds! While using the water heater, always check the water temperature and

adjust as needed before use.

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 ooding. If your water heater is installed in a geo-

graphic location that sees very low sustained temperatures, you MUST install a back-

ow 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 o 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

1. Water - controlled automatic ignition:

When water ow is detected, heating is provided immediately with a double ignition

device. The ame is sensed by ions. This sensitive control makes the unit easy and

convenient to operate.

2. Auto - cut off protection:

The auto-cut-o protection will shut o the gas supply immediately if the ame goes

out for any reason.

3. Energy savings:

The advanced combustion system comes with a Winter/Summer switch. In winter, when

incoming water temperatures are lower, the winter setting increases the size of the

ame to compensate with extra heating. In summer, when incoming water

temperatures are higher, the summer setting reduces the ame.This provides more

comfort and energy savings in the form of lower gas consumption in warmer months.

FUNCTION AND FEATURES

4. Low water pressure start up function:

Theseunit requires 2 - 2.9 PSI to re, making it suitable for users with low water pres-

sure, or those who are using it to supply hot water to upper oors. Please note that

the water ow and water pressure are not the same. Sucient ow is always

required to keep the overheat safety sensor from shutting the unit o.

5. Anti - freezing protection:

When the temperature is below freezing, remove the water discharge valve to

discharge accumulated standing water inside the internal pipes. This will keep the

unit from freezing.

6. Anti-dry combustion protection:

Should dry combustion occur for any reason, the gas supply will be immediately and

automatically shut o.

7. Over-pressure protection:

When water pressure is over 145 PSI, the unit will automatically relieve the excessive

pressure to avoid damage to its internal components.

PRECAUTIONS

1. The water heater must be installed in a well-ventilated area. An exhaust pipe of

double walled construction for category I heating appliances, i.e. B-vent or Z-vent if

excessive condensation is a concern must be installed to discharge the exhaust from

the ame (venting supplies can be located at most home improvement stores in the

water heater section) must be installed to discharge the exhaust from the ame.

During operation, the water heater consumes a lot of oxygen, so the exhaust pipe

and outlet hole must be properly installed. Refer to exhaust pipe section for details.

Failure to properly install the room intake and exhaust pipe will cause oxygen deple-

tion in the area around the water heater, which can cause incomplete combustion.

Carbon monoxide poisoning, death and serious accidents can occur due to incom-

plete combustion. ALL USERS OF GAS APPLIANCES OF ANY TYPE SHOULD EMPLOY

THE USE OF A CARBON MONOXIDE DETECTOR.

Exhaust fan

DRAWING 01

Air inlet

There shall be an air inlet and

an exhaust outlet

2. Don't expose the water heater to the strong wind or rain.

3. Use only the type of gas that is specied on the name plate.

4. All gas connections should be made by a professional.

5. Don't use pipes, tubing or other connections that are aging or cracked.

6. Do not use with water pressures lower than 8 PSI. Do not use with lower GPM's

than indicated on the ow chart for your unit.

7.The water heater shouldn't be installed above cooking appliances, such as ovens or

stoves.

8. The water heater should be installed a minimum of 15 feet from any stairs or

emergency exits.

9. The water heater must be installed vertically, according to the mounting instructions.

10. The water heater must not be installed near ammable or volatile substances.

MOUNTING YOUR WATER HEATER

a) Please consult all venting requirements in the "Installing the Exhaust Pipe"

section of the manual before choosing the nal place to mount the heater.

b) When possible, your water heater should be mounted directly to studs. There

should be a screw in every available mounting location on the heater. If studs are not

available, do NOT hang unit directly from sheetrock without utilizing expansion

screws.

QUICK START GUIDE

DRAWING 02 DRAWING 03

The water heater must not

be exposed to strong winds. The water heater must not

be installed outside.

c) When utilizing expansion screws for sheetrock mounting, hold the unit on the wall

where you want it mounted. Mark with a pencil the (4) mounting holes. Remove the

unit from the wall, and drill 3/8" holes on each mark. (See drawings below).

d) Install the expansion bolt into the drilled hole. Hang the unit utilizing the screws

supplied.

WATER SUPPLY

Connect the cold water inlet supply

Note: Use white Teon tape at all threaded water connections

- The cold water inletjoint is ½" NPT threaded pipe.

- The water inlet should be connected by using exible heavy duty tubing or rigid PVC

pipe. If you choose exible tubing, you will need a½" threaded male to½" hose barb

adapter. Tubing should be secured with properly sized hose clamps. Rigid pipe should

be ½" male threads. Teon tape should be employed with any threaded ttings.

- The inner diameter of the inlet pipe (including the valve) should not be less than 3/8".

Larger diameter pipe is acceptable with the appropriate adapters to reduce to ½" at the

inletjoint.

-The cold water valve must be installed inline with the water inlet pipe.

- Always ush a new unit with water to clear out any collected deposits or debrisprior

to installation. The supplied screen lter must be correctly installed in the cold water

inlet to prevent mineral deposits from your water supply from building up in the unit's

water valve assembly. After ushing with cold water and conrming that there is no

residue in the pipe, install the rubber gasket and tighten the water inlet joint.

DRAWING 04

Nut

Washer

Expansion screw

Heater case

HOT WATER OUTLET

- The hot water outlet joint is ½" NPT pipe thread.

- The hot water outlet should be connected by exible tubing or rigid PVC of the type

intended for use with hot water.

- The inner diameter of the water outlet pipe (including the valve) shouldn't be less

than 3/8". Larger diameter pipe is acceptable as long as the appropriate adapters are

used.

- After connecting, fully open the cold water supply to conrm the ow of water and to

check for leaks. Correct leaks as necessary.

INSTALLING THE GAS SUPPLY

The gas inlet joint is ½" NPT pipe thread. Very Important: Use Teon tape for gas or gas

pipe paste between the unit and the gas inlet pipe connector.

- For small bottle Liquid Propane installations: Connect the gas supply to your propane

bottle using a standard rubber Liquid Propane hose and low pressure regulator. Opti-

mal pressure for your unit is .41-.5 PSI, the same as a typical gas grill. Pressures set

outside this range may result in inconsistent behavior from your water heater.

- For whole house Liquid Propane or Natural Gas Installations: The unit should be con-

nected directly to the home gas supply using black iron gas pipe or the braided metal

gas appliance hoses located in the water heater section of your local home improve-

ment store. WARNING: THIS TYPE OF CONNECTION MUST BE MADE BY A PROFESSION-

AL. Please note that Natural Gas units require .25-.5 PSI for your unit to operate correct-

ly. If you are unsure of your gas pressure, contact your gas company.

After the gas inlet is connected, open the gas supply valve and check for gas leaks at all

connections by spraying with soapy water and watching for bubbles. Do not skip this

step! Adjust or repair leaks as needed.

- All gas connections must be made in accordance with local building codes and regu-

lations.

INSTALLING THE EXHAUST PIPE

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.

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