Marey POWER GAS 16L User manual

POWER GAS WATER HEATER
INSTRUCTION MANUAL
Keep this manual with you after your unit has been installed,
you may need it for further technical information.
GAS
SUMMER
VERANO
WINTER
INVIERNO
GAS
WATER/AGUA
GAS
SUMMER
VERANO
WINTER
INVIERNO
GAS
WATER/AGUA
GAS
SUMMER
VERANO
WINTER
INVIERNO
GAS
WATER/AGUA
GAS MODELS

02 03
PACKING LIST
EMPERATURE INCREASE CHART
IMPORTANT WARNINGS
FUNCTIONS AND FEATURES
INSTALLATION
OPERATING INSTRUCTIONS
INSTRUCTIONS FOR DAILY MAINTENANCE
CONSTRUCTION AND PART IDENTIFICATION
TECHNICAL PARAMETERS
T
TROUBLESHOOTING GUIDE
CUSTOMER SERVICE
OTHER PRODUCTS
Congratulations!
You've just purchased a new Marey Power Gas tankless water heater
and will soon begin to enjoy the benefits of “goingtankless.”
The availability of instant hot water, combined with the unit's outstanding
energy efficiency and space saving design, will quickly convince you that
you've made the best decision for meeting your home's hot water needs.
Takethetimetothoroughlyreadandunderstandthissafetyandinstallation
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 andwarnings. Feelfreetocallusat
512-332-2229shouldyouhaveanyquestions. Pleasekeepthismanualfor
future reference.
WARNING: If you are notfamiliarwithbasicplumbingand electricity,we
highlyrecommend that you employ theservicesofaprofessionaltoassist
you with this installation. Under no circumstances should you attempt to
install,repair,ordisassemble theMareyPowerGaswaterheaterwithoutfirst
shutting off any gas supplied to the unit.
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0504
1.Waterheater-Qty1
2.Gasinlethoseconnector-Qty1
3.Rubbergasket-Qty2
4.Sprayer-Qty1
5.OperatingInstructions-Qty1
6.MountingScrews-4Sets
- You MUST install this water heater according to all directions and specifications
containedinthismanual. Failuretoproperlyinstalltheheatercanresultinproperty
damage or severe injury or death by burning, explosion, or asphyxiation due to
carbonmonoxide.
- You MUST check the exhaust flue for obstructions at the initial installation and at
leastannuallythereafter.
- You MUST check all connections for gas leaks with soapy water before firing the
unit. Thismustbedone atthe initialinstalland afterevery propanebottlechangeif
usinganLPmodel. Ifyoudetectagasleakofanykind,DONOTfireupyourunit.
- 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 fire up
yourunit.
- You MUST observe the unit in operation for several cycles before leaving it
unattended.
- Unit MUST be hung vertically, with the water and gas connections at the bottom
andtheexhaustatthetop.
- You MUST use a carbon monoxide detector in conjunction with this, or any, gas
burningappliance.
-DoNOTexposethewaterheatertostrongwind(includingthatfromfans)orrain.
- Do NOT install the water heater near flammable or volatile substances. Do not
handle or store these substances near the heater (gasoline, acetone, motor oil,
paintthinnersoranyotherflammableorvolatilesubstance).
-DoNOTusetubingorpipingthatisagingorcrackedinanyway.
- Do NOT use this appliance with any type of gas other than that indicated on the
dataplatelocatedonthesideoftheunit. Deathorsevereinjurymayresult.
-DoNOTattempttomodifytheinternalcomponentsofthisappliance.
- Do NOT install the water heater in a sealed room or in a room with poor air
circulation.
-YouMUSTinstalltheexhaustpipetoproperlydischargetheexhaustgases.
- Do NOT block the exhaust pipe or the air inlet at any time. This can cause
incompletecombustionandcanleadtogaspoisoning.
- When the water heater is in use, do NOT touch the body of the heater. Touch the
knobsonly,asthebodyoftheheatercanbecomeveryhottothethetouch.
- Prevent scalds! While using the water heater, always check the water
temperatureandadjustasneededbeforeuse.
1. Water-controlledautomaticignition:
When water flow is detected, heating is provided immediately with a double-
ignitiondevice. Theflameissensed by ions. This sensitivecontrolmakes the unit
easyandconvenienttooperate.
2. Auto-cutoffprotection:
Theauto-cut-offprotectionwillshutoffthegassupplyimmediatelyiftheflamegoes
outforanyreason.
3. Energysavings:
TheadvancedcombustionsystemcomeswithaWinter/Summerswitch. Inwinter,
whenincomingwatertemperaturesare lower,the winter setting increases thesize
of the flame to compensate with extra heating. In summer, when incoming water
temperaturesare lower,thesummer setting reduces theflame.Thisprovides more
comfort and energy savings in the form of lower gas consumption in warmer
months.
4. Lowwaterpressurestartupfunction:
This unit requires only 8 PSI to fire, making it suitable for users with low water
pressure,or thosewho areusing ittosupplyhotwater toupper floors. Pleasenote
that the water flow and water pressure are not the same. Sufficient flow is always
requiredtokeeptheoverheatsafetysensorfromshuttingtheunitoff.
5. Anti-freezingprotection:
When the temperature is below freezing, remove the water discharge valve to
dischargeaccumulated standing water insidetheinternal pipes. This will keep the
unitfromfreezing.

0706
6.Anti-drycombustionprotection:
Should dry combustion occur for any reason, the gas supply will be immediately
andautomaticallyshutoff.
7.Over-pressureprotection:
When water pressure is over 145 PSI, the unit will automatically relieve the
excessivepressuretoavoiddamagetoitsinternalcomponents.
PRECAUTIONS:
1. The water heater must be installed in a well-ventilated area. An exhaust pipe of
double walled steel for Class 3 appliances (located at most home improvement
stores in the water heater section) must be installed to discharge the exhaust from
the flame. 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
sectionfordetails.
-Failure to properly install the room intake and exhaust pipe will cause
oxygen depletion in the area around the water heater, which can cause
incomplete combustion. Carbon monoxide poisoning, death and serious
accidents can occur due to incomplete combustion. ALL USERS OF GAS
APPLIANCES OF ANY TYPE SHOULD EMPLOY THE USE OF A CARBON
MONOXIDEDETECTOR.
2. Don´t expose the water heater to the strong wind or rain.
3. Useonlythetypeofgasthatisspecifiedonthenameplate.
4. Allgasconnectionsshouldbemadebyaprofessional.
5. Don'tusepipes,tubingorotherconnectionsthatareagingorcracked.
6. Donotusewithwaterpressureslowerthan8PSI. DonotusewithlowerGPM's
thanindicatedontheflowchartforyourunit.
7. The water heater shouldn't be installed above cooking appliances, such as
ovensorstoves.
8. The water heater should be installed a minimum of 15 feet from any stairs or
emergencyexits.
9.Thewaterheatermustbeinstalledvertically,perthemountinginstructions.
10. Thewaterheatermustnotbeinstallednearflammableorvolatilesubstances.
MountingYourWaterHeater
a)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
notavailable,doNOThang unit directly from sheetrock without utilizing expansion
screws.
b) 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).
c) Install the expansion bolt into the drilled hole. Hang the unit utilizing the screws
supplied.
Exhaust fan
There shall be a air inlet
and a exhaust outlet.
Air inlet
The water heater must not be
exposed to strong wind. The water heater must not be installed outside.
Drawing 01
Drawing 02 Drawing 03

WaterSupply
Connectthecoldwaterinletsupply
Note: UsewhiteTeflontapeatallthreadedwaterconnections
-Thecoldwaterinletjointis½”NPTthreadedpipe.
- The water inlet should be connected by using flexible heavy duty tubing or rigid
PVC pipe. If you choose flexible tubing, you will need a ½” threaded male to ½”
hose barb adapter. Tubing should be secured with properly sized hose clamps.
Rigid pipe should be ½” male threads. Teflon tape should be employed with any
threadedfittings.
- The inner diameter of the inlet pipe (including the valve) should not be less than
3/8”. Largerdiameterpipeisacceptablewiththeappropriateadapterstoreduceto
½”attheinletjoint.
-The cold water valve must be installedinlinewith the water inlet pipe.
-Alwaysflushanewunitwithwatertoclearoutanycollecteddepositsordebris
0908
priortoinstallation. Thesuppliedscreenfiltermustbecorrectlyinstalledinthecold
water inlet to prevent mineral deposits from your water supply from building up in
the unit's water valve assembly. After flushing with cold water and confirming that
there is no residue in the pipe, install the rubber gasket and tighten the water inlet
joint.
HotWaterOutlet
-Thehotwateroutletjointis1/2”NPTpipethread.
- The hot water outlet should be connected by flexible tubing or rigid PVC of the
typeintendedforusewithhotwater.
-The inner diameter of the water outlet pipe (including the valve) shouldn´t
be less than 3/8”. Larger diameter pipe isacceptableaslongastheappropriate
adaptersareused.
-Afterconnecting, fully open the cold water supply to confirm the flow of water and
tocheckforleaks. Correctleaksasnecessary.
InstallingtheGasSupply
The gas inlet joint is 1/2”NPTpipethread.VeryImportant: UseTeflontape for gas
orgaspipepastebetweentheunitandthegasinletpipeconnector.
-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. Optimal pressure for your unit is .41-.5 PSI, the same as a typical gas
grill. Pressuressetoutsidethisrangemayresultininconsistentbehaviorfromyour
waterheater.
-ForwholehouseLiquid Propane or Natural Gas Installations: Theunit should be
connected 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
improvement store. WARNING: THIS TYPE OF CONNECTION MUST BE
MADE BYA PROFESSIONAL. Please note that Natural Gas units require .25-.5
PSI for your unit to operate correctly. If you are unsure of your gas pressure,
contactyourgascompany.
After thegasinlet is connected,openthe gassupplyvalve and checkforgas leaks
at all connections by spraying with soapy water and watching for bubbles. Do not
skipthisstep! Adjustorrepairleaksasneeded.
- All gas connections must be made in accordance with local building codes and
regulations.
Drawing 04
5"
Washer
Nut
Expansion Screw
Heater Case
18"
25"
29"
7,5" 8"

1110
InstallingtheExhaustPipe
-Ventpipeofdouble walled stainless steelforClass 3 appliancesmustbe used for
venting the water heater to the outside. Do Not Attempt to use any other type of
vent pipe. All venting must be done in accordance with local building codes and
regulations.
- Diameter of the vent pipe is 4” for 5L, 4” for 10L, and 5” for 16L units. Use the
coupler provided with your unit for installation on the 5L and 10Lunits. Vent pipe
attachesdirectlytotheunitin16Lmodels.
-Throughwallinstallations: Use(2) 45degreeelbows,(1)pieceofstraight pipeno
longerthan18”inlength,onepieceofstraightpipenolongerthan42”inlength,and
onewin/raincap.
-From theoutletat thetopof thewaterheater,attachthe first 45degree elbow with
a vent pipe coupler to secure it to the unit. Once the elbow is attached, use it as a
guideto cutahole throughthewall ata45 degree upwardangle, at aslightly larger
diameterthanthe outlet pipe. Installthe18” piece of straight pipe tothe45degree
elbowandpassitthrough theholeinthewall. Note: If theoverallthicknessofyour
wallexceeds 18”,thelengthofthe firstpipecanbeextended upto24”. If thisisthe
case,reducethelengthofthesecondpipeto36”. Totalventingdistanceshouldnot
exceed60”.
-Attach the second45degree elbowonthe other sideofthe wall,turningthe angle
upward to run parallel with the wall. Install the second piece of flute pipe into the
elbow, parallel to the outside wall. Utilize galvanized steel brackets or clamps as
necessarytosecurethepiping. Installtherain/wind capontop ofthesecond piece
ofexhaustpipe.
- Install a condensation drain on the outer bend of the 45 degree elbow located
outsidethestructure.
-Throughtheroofinstallations: Useonepieceofstraightpipe,60”orshorter,anda
wind/rain cap. Attach directly to the outlet of the unit (16L units), or using the
couplersupplied(5Land10Lunits).
-Drilla hole through the roof and ceiling slightly larger than the vent pipe diameter.
Attach pipe to the top of the unit and go straight up and out the roof. Install
rain/windcapontopofventpipe. Totalverticaldistancemustnotexceed60”. Roof
clearancemustbeatleast12”.
-Freshairintake: Theroominwhichtheheaterislocatedmusthaveanairinletnot
lessthan.75squarefeet(roughly9”x12”orlarger).
-Afterinstallationis complete,open thebattery compartmentlocated atthe bottom
of the unit and install two D Cell batteries. Check the door of the battery
compartmentforcorrectbatteryposition.
- Open the hot water on a nearby faucet. Confirm proper water flow through the
unit and out of the faucet. (You should hear a “clicking” sound from the unit-this is
theignitoractivating). Turnthewaterbackoff.
Drawing 05
Wind/rain cap
Outlet
Water heater Wall
45º elbow
Straight pipe 18" or less
Straight pipe 42" or less
Coupler (island 10L only)
Water heater
Outlet
Coupler (5L and 10Lunits)
Through Roof
12" min
Ceiling
Roof
Straight pipe
Cap
60" max

1312
-Start the gassupply. Check again forgasleaks using soapywaterand correct as
necessary.
- Open the hot water faucet. You should hear the ignition clicking, and hot water
should begin flowing. Sometimes, if there is air in either the water or gas supply
lines, you will not get immediate combustion. If this is the case, turn the water on
andoffseveraltimes toclear thewaterand gaslinesof anyair pocketsthatmay be
present.
- All water heaters have a seasonal summer/winter switch to meet your water
temperatureneeds. Thisisbecauseextraheatingmayberequiredwhenincoming
watertemperaturesare lower (winter), andlessheating is required whenincoming
watertemperatures are higher(summer). Use thesummer setting whenincoming
watertemperaturesare a little higher. Usethe winter settingwhenincomingwater
temperaturesarealittlelower.
-Whenthewatersupplyis turnedoff,thewaterheaterwillstopworking. Whenyou
turnthewaterbackon,thewaterheaterwillreignite. Pleasenotethatifyouusethe
hot water multiple times in quick succession, the water may be excessively hot for
oneortwoseconds. Pleasewaitforthetemperaturetoadjustbeforeusing.
-Ifyouclosethewaterinletvalveorthewateroutletvalve,thewaterheaterwillshut
offimmediately. Shutoffthegassupplyafteruse.
1. If a gas leak is detected at any time, close the main gas valve immediately. The
Mareyservicecenteroryourlocalgascompanyshouldbecontactedforrepair.
2.Beforegoingtosleeporleavingthehouse,thegassupplyshouldbeshutoff.
3. Do not block the exhaust pipe or the air inlet. This can cause incomplete
combustionandleadtogaspoisoning.
4. During operation, check the fire through the sight glass for normal combustion.
Check for a compact, blue flame. Tall or excessively orange flames indicate
abnormal combustion. If there is abnormal combustion, close the gas valve
immediately and contact the Marey service center or your gas company for
maintenance.
5. When outdoor temperatures are below 32 degrees F and pipe freezing may
occur, any water remaining in the unit after use should be discharged to avoid
freezing. Watershouldbedischargedinthefollowingmanner:
a) Turn off the gas supply valve, turn off the tap water supply valve, and turn the
water temperature adjusting switch to the low temperature position. Turn on the
hot water supply valve and remove the water discharge valve to discharge the
waterremainingintheunit. Reinstallthewaterdischargevalve.
Checkthegaspipes,hoses,andventpipesregularly. Ifyou find joints that are not
tightly secured or if there are cracks or corrosion anywhere, you should stop using
theheaterandperformthenecessarymaintenanceimmediately.
Checkregularlyforwaterorgasleaksandcorrectimmediately.
Regularly clean the surface of the water heater to remove dirt or dust with a wet
cloth,and then useadry clothtoremove moisture. Forhard toremove dirt, please
useamildspraycleanerordetergent.
Do NOT use strong detergents, benzene, gasoline, or other flammable agents to
cleantheunit.
Regularlyremoveandwashthestainlesssteelfilterinthecoldwaterinlet.
During operation, take note of the flame and discontinue use if abnormal
combustionisdetected.
Avoidaccidents. DONOTmodifythisunitinanyway.
Specification
Instruction
Sighting Window
Winter/Summer knob
Gas controlling knob
Water controlling knob
Gas controlling knob
Water controlling knob
(D). Water heater type D
(Drawing 1)
Specification
Instruction
Sighting Window
Winter/Summer knob
Drawing 06

1514
5Land10Lunits 16Lunits
IMPORTANT WARNING - PLEASE TAKE NOTE
If your unitisa16Lmodel,youMUSTfollowthisdiagramforcorrectly connecting
water and gas to the unit.
The water and gasconnectiondiagramcontainedonthepreviouspage accurate
only for the 5L and10L Power Gas models. If you have a 5L or 10L unit, please
follow the diagram contained on the previous page.
Battery Box
Back plate
Heat exchanger
Burner
Ignition pin II
Thermocou
Water adjusting Valve
Microactive switch
Water discharge valve
Water inlet pipe
Gas inlet pipe
Hot water outlet pipe
Ignition Module
Solenoid valve
Gas adjusting valve
Ignition pin I
Temperature controller
Gas -collecting roof
Water inlet pipe
Gas inlet pipe
Hot water outlet pipe
Drawing 07 Drawing 08

1716
Model
Gas Type
RelatedGas
Pressure
Heat Load
Exhaust
DischargeMode
ControlModel
IgnitionMode
SafetyDevice
Applicable
WaterPressure
Hot Water
Outlet Per
Minute
GasPipe
ColdWaterPipe
HotWaterPipe
LPG 0.4 PSI
NG 0.4PSI
LPG 0.4 PSI
NG 0.4 PSI
LPG 0.4 PSI
NG 0.4 PSI
1/2" NPT
34,614 BTU/h
79,228 BTU/h
111,903
BTU/h
10-LayerSafety Protection
8.0- 145.0 PSI
5L/min
1.7Gal/min
10L/min
2.7Gal/min
POWER GAS 5L
POWER GAS 10L
POWER GAS 16L 16L/min
4.2Gal/min
FlueDuct Type
WaterPressureControlled
PulseDoubleIgnition
1/2" NPT
Flow (GPM) / Tem Icrease (F)
Model*
5GPM
1.0GPM
1.5GPM
2.0GPM
2.5GPM
2.7GPM
3.0GPM
3.5GPM
4.0GPM
4.3GPM
96
48
32
25
-
-
-
-
-
-
34
17
11
9
-
-
-
-
-
-
129
64
43
32
-
-
-
-
-
-
34
17
11
9
-
-
-
-
-
-
-
100
67
50
40
37
-
-
-
-
68
34
23
17
14
13
-
-
-
-
-
143
95
71
57
-
48
41
36
33
88
44
29
22
18
-
15
13
11
10
Gas
Setting**
Highest
Lowest
Highest
Highest
Highest
Lowest
Lowest
Lowest
GA5L
Portable
GA5L
GA10L
GA16L
5Land10Lunits
TemperatureIncreaseChartforMareyTanklessGasWaterHeaters
*WithandwithoutLCDpanels.
**Highestgassetting:setforWinter/High.
Lowestgassetting:setforSummer/Low.
Note: If your gas model features an LCD panel, the digital display will indicate the
outgoingwatertemperature.
This information is intended as a guideline based on typical residential
environments. Temperature increases will vary depending on the environment in
which the heater is used. Variables such as very low incoming water temperature
or higher than average gas pressure can result in higher temperature increases.
Higher incoming water temperature or lower than average gas pressure can result
in lower temperature increases. ALWAYS test the water with your hand to confirm
suitabletemperaturebeforeuse.

Marey proudly manufactures water heaters and accessories for use in almost any
application. PleasevisitourwebsitetolearnmoreaboutotherMareyproducts.
ECO180
AQUAMATIC POWER GAS
SANTON
GAS PORTABLE POWER PAK
1918
1-512-332-2229
[e-mail] Delbrey Street, 211
San Juan, Puerto Rico
00912
Tel. [phone]
www.marey.com
At Marey, we pride ourselves on the excellence of our customer service and
support team.
Please feel free to contact us if you have any questions about our products,
warranty service, or if you need assistance installing a unit. We also strive for
continuous improvement, so we welcome your comments, feedback and
suggestions.