Marey POWER PAK Operating and maintenance manual

Keep this manual with you after your unit has been installed, you
may need it for further technical information.
GAS TANKLESS WATER HEATER
INSTRUCTIONAL
MANUAL
USA [phone] PR [phone]www.Marey.com
POWER PAK
MODEL

Congratulations! You've just purchased a new Marey Power Gas 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 s
upplied to the unit.

INDEX
QUICK START GUIDE
WARNING
PACK CONTENTS
TECHNICAL SPECIFICATIONS
ELECTRICAL REQUIREMENTS
WIRING DIAGRAM
INSTALLATION OPTIONS
INTERNAL COMPONENTS
SAFETY
SITE REQUIREMENTS
CONNECTING TO SERVICES
HOW TO USE - HOW IT WORKS
TEMPERATURE CONTROL
ENERGY SAVING TIPS
SPARE PARTS
FAULT FINDING (TROUBLESHOOTING)
SPECIAL EQUIPMENT AND ADVICE TO USERS
TEMPERATURE INCREASE CHART PER GPM
CUSTOMER SERVICE
04
05
05
05
06
07
07
08
08
09
09
11
12
12
12
13
14
14
15

04
QUICK START GUIDE
1. Securely mount your water heater in an appropriate
location using the hanging bracket and wall anchors supplied
with the unit.
PP110: the unit should not
be
installed more than 6ft
PP220 (PPXE5): the unit
should not be installed
more than 40ft away from
2. Secure the bracket to the walI with the screws supplied.
WARNING: Working with electricity can be dangerous. If you are not
knowledgeable about basic electrical practices and local building codes
please DO NOT attempt to install this unit without the assistance of a
3. The units have to be installed in copper pipe and for the
connection between the pipe and the heater use exible
110V (PP110): Connect (1) white wire to the single pole (110V) breaker. Connect (1) white wire to the
neutral bar on your breaker box. It does not matter which white wire is connected to power and which is
connected to neutral. Connect the green ground wire to the ground bar on your breaker box.
220V (PPXE5): Connect (2) white wires to the double pole (220V) breaker. Connect the green ground wire
to the ground bar on your breaker box.
Caution: these are TWO separate units. Not one unit that can be wired as 11OV OR 220V. Please check the
model number on the right side of your unit.
4. Make the electrical connections to the breaker. Breaker
size can be 10, 20, 30, or 40 AMPS, depending on the
amount of heating needed (Power setting cannot exceed
breaker size). Wire gauge will vary depending on amper-
age and distance. Contact an electrician if you're not sure.
6. Turn on the hot water faucet and adjust the heater to the
appropriate ow and temperature setting for your situa-
tion.
Use caution not to get scalded until the appropriate
temperature settings are in place. Higher ow rates will
result in cooler water and vice versa. Higher amperage will
DO NOT TURN ON THE BREAKER YET!
5. Turn on the hot water faucet and allow it to ow for at
least 30 seconds. Turn the faucet back o. Turn on the
When you turn on the tap, the water heater will automatically engage. When you turn o the tap, the water
heater will turn o automatically.
Enjoy endless, 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 operate your heater. For a complete list of safety
warnings and instructions please reference the instruction manual before operating your water heater.
6FT 40FT

1. WATER HEATER - QTY 1
2. OPERATING INSTRUCTIONS - QTY 1
3. MOUNTING SCREWS - 4 SETS
TECHNICAL SPECIFICATIONS
05
WARNING
If your water heater requires a reset, be sure to TURN OFF THE BREAKERS prior to
resetting the unit.
Resetting your unit without turning o the breakers can result in personal injury and
damage to your water heater.
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, which can cause ooding. 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
disconnecting the water lines. Leave the water lines disconnected until you intend to
PACK CONTENTS
Voltage
Power
Max. Flow Rate
Points of Use
Recommended Wire Size
Activation Flow
Safe Operating Pressure
Water Connections
Frequency
Amperage
Water Pressure
Master Place Cover
Dimensions
Weight
Standard and Approvals
PRODUCT CODE PP110 PP220(PPEX5)
8 AWG
0.66 GPM
8 PSI - 90 PSI
½" NPT
50 - 60 Hz
10 - 40 A
0.55 Bar(8PSI)-6.37 Bar (92.36PSI)
ABS Heating Elements
Copper
11.1" X 10.2" X 4.8"
7 lbs
110V
1.1kW- 4.4kW
1.0 GPM
One
220V
2.2kW- 4.4kW
1.9 GPM
Multiple
4-in-1 AMP
(10, 20, 30 or 40)
AMP AMP
AMP
40 AMP
Breaker
PP110
PP220
KW
4.4kW
Power
6ft Distance
Point of Use
MAX
One Point
of Use
V
110V
KW
8.8kW
Power
40ft Distance
Point of Use
MAX
Multiple
Points of Use
V
220V

FOR PP110:
Connect (1) white wire to the single pole 10, 20, 30 or 40 Amp circuit breaker.
Connect (1) white wire to the neutral bar on your breaker box. It does not matter
which white wire connects to neutral and which connects to the breaker. Connect the
green ground wire to the ground bar on your breaker box.
FOR PP220 (PPXE5):
Connect the (2) white wires to the double pole 10, 20, 30 or 40 Amp circuit breaker.
Connect the green ground wire to the ground bar on your breaker box.
This appliance MUST be grounded. Connect the ground wire, as indicated in the
Electrical Code.
When all connections are satisfactorily prepared, install the heater cover. With the
insulated container o and water ow modier (optional) fully open, the faucet must
be opened fully to get maximum water ow. It is necessary to ensure that the water
tank is full before turning the power on. This is an essential step to protect the heating
element.
Note that the above instructions are simply guidelines that apply to most installations.
The size of the switch and wire gauge must meet all local, state, provincial and nation-
al electrical codes in your area. Contact an electrician if you're not sure.
To determine the minimum electrical circuit please see the next table:
06
The heater must be connected to its own independent electrical circuit. InstalI a fuse
box or switch ("breaker") for exclusive use of the heater.
The wire gauge necessary will vary based on amperage and distance to the breaker,
but 8 gauge wire is generally sucient for most installations. If the distance is very
short, sometimes smaller gauge wire may be used. If you aren't sure which gauge of
wire should be used, contact an electrician. The supply wire, main switch and circuit
protection (Leakage Circuit Breaker) must be sucient for the amperage required.
Please check the table above and the ow rate/temperature rise chart for the appro-
priate amperage for your situation. Note that the lower the amperage, the lower the
water temperature rise will be.
DO NOT TURN ON THE BREAKER SWITCH UNTIL ALL ELECTRICAL AND PLUMBING
ELECTRICAL REQUIREMENTS

Remember that the above instructions are just guidelines that apply at most installa-
tions.
Caution: These are TWO separate units. Not one unit that can be wired as llOV OR
220V. Please check the model number on the right side of your unit.
Remember that you should remove the red and blue covers before installing your
unit.
07
Position 1 and 2
Position 1, 2 and 3
Position 1, 2, 3 and 4
POWER SELECTOR MINIMUM BREAKER
20 Amperes
30 Amperes
40 Amperes
WIRING DIAGRAM
INSTALLATION OPTIONS
Amperage control knob
Main water supply valve
Green ground wire
(Connect to ground bar
on breaker box)
Connect both (2) white
wires to breaker.
PP220 (PPXE5) Model:
PP220 (PPXE5)
Connect one (1) white wire to breaker
and one (1) white wire to neutral.
PP110 Model:
PP110
Two or more points of useOne point of use

08
Working with electricity requires proper skills and knowledge - Installation of the unit
should be performed by someone who is familiar or trained in this trade. We HIGHLY
recommend that you hire the services of a licensed and qualied "Electrician/Plumb-
er" familiar with tankless water heaters installation.
IMPROPER INSTALLATION CAN CAUSE INJURY OR EVEN DEATH.
IMPORTANT: All electrical work and unit xing to the wall should be completed before
connecting electrical wiring.
When you turn on the unit, extremely hot water could come out. Take proper safety
precautions to avoid being hurt or burned by water.
DO NOT expose the unit to freezing temperatures. Do not use an input water
temperature over 90 °F or 32.2 °C. This unit is designed for indoor use only.
DO NOT restrict the ow of water entering the unit.
DO NOT operate the appliance if water ceases to ow during use, if the outer case or
cover is loose or if the unit is not working properly.
SAFETY
INTERNAL COMPONENTS
Thermostat
Safe valve
Water valve
Microswitch
Power lamp
Container
(Heating
element
inside)
Water outlet Water inlet

09
If the unit leaks or does not heat properly, disconnect the unit.
ISOLATE the electrical and water supplies before removing the cover and before
proceeding with installation or servicing.
NEVER OPERATE THIS HEATER WITHOUT THE COVER!
WATER AND PLUMBING REQUIREMENTS
DO NOT USE PVC, CPVC or plastic supply lines directly to the unit. A 16" copper or
stainless steel pipe must be con nected to the heater.
Be sure to clean the pipes before connecting the heater to the main line. Clean all the
impurities of the pipe, allowing water to ow for a few minutes, check for leaks. Any
residue or dirt in the pipes may cause internal damage to the unit.
A safety release valve must be tted in the supply pipe.
We recommend installing a sediment lter before the entry of water to the heater.
Hard water or water with high levels of minerals and alkali can cause damage to this
unit. When this is the case, we recommend the use of a (non-salt) water softening
system.
The provision of a service stop valve in the cold supply pipe will assist in the event of
any subsequent servicing or maintenance.
These heaters are of the closed type (closed system with no ventilation pressure)
suitable for tting to the normal input of cold water with a maximum of 94 PSI (6.5
PREPARATION
1. Isolate electrical and water supplies BEFORE proceeding with the installation.
SITE REQUIREMENTS
CONNECTING TO SERVICES

10
2. The unit must be mounted on a at surface in a vertical position with the incoming
and outgoing water pipes facing down. It is not possible to install the unit horizontal-
ly. Please use the installation sticker guide and screws supplied in the product's
original package. Drill the wall for the indicated holes. Check that there are no hidden
wires or pipes, before drilling holes for wall mounting.
3. Secure the bracket to the wall with the screws supplied.
5. There are two cable entry points. You can choose one of them and the back plate
will have to be cut out.
6. It is essential that this appliance is connected to a ground.
PLUMBING
7. Use stainless steel exible hose or copper tubing of ½" on the inlet and outlet
pipes.
4. Hook the unit and screw the xing holes, placing special attention to the bottom

WATER
TEMPERATURE
11
8. Turn on the mains water supply to the water heater and then plug the unit at the
isolated electrical outlet.
NOTE: The electrical supply is not turned on until all the pipes and the installation is
HOW TO USE - HOW IT WORKS
THE WATER HEATER WILL TURN ON, WHEN YOU:
1.Turn on a water faucet.
2.The power indicator will light.
TO STOP THE WATER HEATER:
Turn o the faucet.
TO USE THE POWER SELECTOR:
The power selector knob has ve positions:
POWER
SELECTOR
ColdO
TemperateI (10 A)
HotII (20 A)
HotterIII (30 A)
Max. Hot Water
Temperature
IIII (40 A)

12
The water temperature is altered by increasing or decreasing the ow rate of the water
through the water heater, via the temperature control knob. Increased amperage
settings will result in increased water temperature.
NOTE: If water pressure is low, the inlet pipe of the water should be ¾" with outputs of
5/8".
Small drop:
Lower water outow. Warmer water.
Big drop:
Higher water outow. Less hot
water.
OPERATING INSTRUCTIONS
The heater should be installed as close as possible to the point of use to avoid heat
loss. If longer distances are required, hot water pipes should be insulated.
Adjust heater temperature settings (located on the front panel of the heater) to the
desired output temperature. Lowering the power setting will save energy, but hot
water temperature will decrease.
We recommend that you install the unit under the sink in the main bathrooms or
utility areas. This will allow for lower amperage usage and a reduced heat loss from
long pipe runs.
For additional savings, reduce the water ow valve at the inlet of the heater so the
ENERGY SAVlNG TlPS
The following comprehensive list of spare parts is available for your Power Pak Plus.
DO NOT REPLACE WITH PARTS NOT RECOMMENDED BY MAREY, AS THIS WILL INVALI-
DATE YOUR WARRANTY AND MAY RENDER THE INSTALLATION DANGEROUS.
Description:
- THERMOSTAT
- SAFESTY VALVE
- HEATING ELEMENT CONTAINER
- MICROSWITCH
- WATER VALVE
ENERGY SAVlNG TlPS

Your Marey Power Pak Plus should give you trouble free operation, however should a
problem or fault occur, the table below will assist in identifying the most common
faults. Diagnosis and fault nding should be carried out by a qualied individual,
skilled in
13
FAULT FINDING (TROUBLESHOOTING)
No heating occurs
Water is not
warm enough
Water starts out hot
but then unit
shuts off
Breaker is tripping
Power not connected
Insufficient amperage
at breaker
Too much water flow
Too little water flow
Heating dial not
high enough
Incorrect wiring
Overheat sensor
engaging
Double check for correct
wiring and that all connec-
tions are secure. Ensure that
there is sucient water ow
to engage unit (9 PSI)
Increase size of breaker to 40
Amps if smaller breaker is in
use. Turn heating dial to full.
Reduce amount of water
owing through the unit.
Oveheat sensor is shutting
the unit o. Increase water
ow or decrease heat
Double check for correct
wiring and that all connec-
tions are secure. Ensure that
heating dial is no higher than

14
5. There are two cable entry points. You can choose one of them and the back plate
will have to be cut out.
6. It is essential that this appliance is connected to a ground.
PLUMBING
7. Use stainless steel exible hose or copper tubing of ½" on the inlet and outlet
pipes.
The pressure relief device is designed into the water heater. The device will work
automatically, when excessive build up of pressure occurs. Do not replace the
pressure relief device with any other screw.
The unit is built of reproof material.
There is a safety thermal cut-out device in the water heater. This thermostat will cut o
electricity to prevent scalding, when there is a sudden rise in water temperature, this
protecting the user.
All models can be tted with Leakage Circuit Breaker (optional).
It is important to keep the showerhead clean in order to maintain the performance of
the water heater.
*Temperature increases listed are based on use of the water heater under optimal
conditions with an incoming water temperature of 48° F. Variable factors such as
incorrect or imperfect installation or warmer incoming water temperature may yield
dierent results.
SPEClAL EQUlPMENT AND ADVlCE TO USERS
TEMPERATURE CHART INCREASER PER GPM*
PP110 GPM
0.8
1.0
-
-
38°F
30°F
-
-
Temp. Increase
per GPM
PPEX5 GPM
0.8
1.0
1.5
1.9
75°F
60°F
40°F
32°F
Temp. Increase
per GPM

15
[e-mail]
www.Marey.com
[phone]
U.S.A
[phone]
PUERTO RICO
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.