Everflo EPU-US10 User manual

INSTALLATION INSTRUCTIONS —
POINT OF USE WATER HEATERS
EPU - US10
EPU - US15

CONTENTS
Special Information 2
General information 3-4
Safety 5
Appliance description, cleaning, care & maintenance 7
Appliance dimensions 8
Installation - fixing to wall 9
Installation, water connection 10
Installation - water pressure 11
Installation cold water feed diagrams 12
Installation, electrical connection 13
Commissioning 15
Troubleshooting 16
Safety & shutdown 17
Maintenance 18
Specification, dimensions and connections 17
Heat-up profile 18
ERP Performance 20
Data table 21
Gaurantee terms and conditions 22
01

SPECIAL INFORMATION
The appliance may be used by children aged 8 and older and persons with reduced physical,
sensory or mental capabilities or a lack of experience and know-how, provided that they are
supervised or they have been instructed on how to use the appliance safely and have understood
the resulting risks. Children must never play with the appliance. Children must never clean the
appliance or perform user maintenance unless they are supervised.
When permanently connected to the power supply using a dedicated junction box, the appliance
must be able to be isolated from the mains power supply by an isolator that disconnects all poles
with at least 3 mm contact separation.
The power cable may only be replaced (for example if damaged) by a qualified contractor.
Secure the appliance as described in chapter “Installation ”.
02

GENERAL INFORMATION
The chapters “Special Information” and “Operation” are intended for both the user and
qualified contractors.
The chapter “Installation” is intended for qualified contractors.
Note
Read these instructions carefully before using the appliance and retain them for future
reference.
instructions should be left with the product or customer.
Safety instructions
Structure of safety instructions
Type of risk
Here, possible consequences are listed that may result
from failure to observe the safety instructions.
»» Steps to prevent the risk are listed.
Symbols, type of risk Keywords
Symbol Type of risk
Injury
Electrocution
Burns
(burns, scalding)
KEYWORD Meaning
DANGER Failure to observe
this information
will result in
serious injury or
death.
WARNING Failure to observe
this information
may result in
serious injury or
death.
CAUTION Failure to observe
this information
may result in
non-serious or
minor injury.
03

Other symbols in this documentation
Note
General information is identified by the adjacent symbol.
»» Read these texts carefully.
Symbol
Material losses
(appliance damage, consequential losses and environmental
pollution)
Appliance disposal
This symbol indicates that you have to do something. The action you need to take is
described step by step.
Note
All measurements are given in mm unless stated otherwise.
04
UNIT OF MEASUREMENT

SAFETY
Intended use
This appliance is intended for domestic use. It can be used safely by untrained
persons. The appliance can also be used in a non-domestic environment, e.g. in a
small business, as long as it is used in the same way.
Any other use beyond that described shall be deemed inappropriate. Following of
these instructions and of instructions for any accessories used is also part of the
correct use of this appliance.
General safety instructions
WARNING Burns
During operation, the tap can reach temperatures in excess
of 60 °C.
There is a risk of scalding at outlet temperatures in excess
of 43 °C.
WARNING Injury
The temperature selector should only be removed by a
qualified contractor.
WARNING Injury
The appliance may be used by children aged 8 and older and
persons with reduced physical, sensory or mental capabilities or a
lack of experience and know-how, provided that they are
supervised or they have been instructed on how to use the
appliance safely and have understood the resulting risks. Children
must never play with the appliance. Children must never clean the
appliance or perform user maintenance unless they are
supervised.
05

Material losses
The user should protect the appliance, the water pipes and
the tap against frost.
Test symbols
See type plate on the appliance for information.
06

APPLIANCE DESCRIPTION
1. Temperature control knob
2. On/Off switch with indicator
Depending on the system, the actual temperatures may vary from the set value.
LOW = Cold. 35oC
HIGH = Highest selectable temperature 75oC
Introduction
This product is a high-efficiency heat generator for hot water production running
on electric power and regulated by an advanced temperature setting system.
The water heater is equiped with an over-pressure and over-temperature
protection.
Operation
You can set any required DHW outlet temperature variably at the temperature
selector.
CLEANING, CARE AND MAINTENANCE
Never use abrasive or corrosive cleaning agents. A damp cloth is sufficient for
cleaning the appliance.
Almost every type of water will deposit limescale at high temperatures. This
settles inside the appliance and affects both the performance and service life.
The heating elements should therefore be descaled if necessary.
A qualified contractor who is aware of the local water quality will tell you when
the next descaling is due.
07
1
2

08
EPU - US10 EPU - US15
WIDTH (A)mm 240 360
DEPTH (B)mm 291 329
HEIGHT (C)mm 347 375
APPLIANCE DIMENSIONS

09
If installing on a wall, drill two 8mm diametre holes on the wall.
The hole centres should be 66mm apart and level.
Use the approriate wall plugs for the wall surface. Mount the bracket to the wall
with suitable screws.
Alternatively, if the wall is not strong enough to support the unit, use a wooden
batton to support the bracket and fix the batton to the wall at a suitable point.
Ensure the position of the bracket leaves enough clearance to mount the unit
and connect the pipework.
Note
Ensure that the appliance is freely accessible for maintenance work.
INSTALLATION - FIXING TO WALL

10
Run cold feed water to the the unit. Connect isolation valve prior to the unit.
Flush the pipework before connection to the unit.
Connect to the cold feed via the pressure relief valve.
Connect from the hot outlet on the hot water fittings.
Having completed the connections, open hot water tap before to opening the
isolation valve feeding the unit.
After a few minutes water will run from the hot tap. Allow the flow to continue to
ensure all air is bled from the pipework. Close the hot water tap.
When hot open relief valve to ensure water discharges safely to drain.
INSTALLATION - WATER CONNECTION

11
INSTALLATION - WATER PRESSURE
The product MUST be fitted with a Pressure Relief Valve. The factory fitted
Temperature/ Pressure Relief Valve can fulfil this function.
Expansion can take place within the cold water supply provided that both :
a) Backflow in the main is not prevented by any stop valve with check valve, pres-
sure reducing valve or similar
b) Hot water expansion does not enter a branch to a cold water outlet (see
Diagram to the right for expansion pipe lengths).
Additionally expansion within the cold water supply will not be possible if the
static supply pressure exceeds 0.41 MPa (4.1bar).
If any of the conditions in above cannot be met, expansion must be accommodat-
ed using an Expansion Vessel. To ensure all expansion takes place in the vessel a
Check Valve must also be fitted together with a Pressure (expansion)
Relief Valve (see diagram to the right).
If the static supply pressure exceeds 0.41 MPa (4.1 bar) a Pressure Reducing
Valve must be fitted to the cold main supply. If a Pressure Reducing Valve is
used, an Expansion Vessel must also be used (see diagram to the right).

12
Pressure
relief
valve
Note: If pressure reducing valve is
used expansion down the mains is not possible
Expansion
vessel
Hot Cold
Nearest cold
draw off Service valve
(fixed jumper or
1/4 turn ball type)
Cold
water
mains
Tundish
To drain (waste)
For expansion in pipwork:
2.8m of pipework is required for the 10 litre model
or 4.2m of pipwork for the 15 litre model.
For inlet pressure up to 0.41 MPa (4.1 bar)
Hot Cold
Check
valve
Nearest cold
draw off
Service valve
Cold
water
mains
Tundish
To drain (waste)
For inlet pressure up to 0.41 MPa (4.1 bar) where expansion
in mains supply is not possible
Expansion
vessel
Hot Cold
Check
valve
Nearest cold
draw off
Service valve
Pressure
reducing
valve
Cold
water
mains
Tundish
To drain (waste)
For inlet pressure above 0.41 MPa (4.1 bar)
Pressure
relief
valve
Pressure
relief
valve

13
Before connection ensure power supply is isolated.
WARNING Electrocution
Carry out all electrical connection and installation work in accord-
ance with relevant regulations.
WARNING Electrocution
When permanently connected to the power supply using a
dedicated junction box, the appliance must be able to be isolated
from the mains power supply by an isolator that disconnects all
poles with at least 3 mm contact separation.
WARNING Electrocution
Ensure that the appliance is earthed.
Material losses
The voltage specified on the type plate must match the mains
voltage.
Follow the information on the type plate.
The following electrical connections are permissible:
Permanent connection to a fuse spur with switch and earth conductor.
INSTALLATION - ELECTRICAL

14
Connect power supply via switched fused spur.
Run flex through power cable entrance position 11 and connect to the terminal
block inside the unit.
INSTALLATION - ELECTRICAL

15
COMMISSIONING
WARNING Electrocution
Commissioning may only be carried out by a qualified contractor in
accordance with safety regulations.
IInitial start-up
1. Ensure the unit has been flushed and is full of water.
2. Switch on power at the fused spur.
3. Turn the temperature setting knob to the desired temperature.
4. Check the entire hydraulic installation for tightness.
5. Allow the unit to heat up.
6. Open hot tap and check temperature of water is at desired
temperature.
Note
If you fail to follow the correct sequence (first water, then power),
the high limit safety cut-out will trip.
WARNING
This appliance is not intended for use by persons (including
children) with reduced physical, sensory or mental capabilities, or
lack of experience and knowledge.
Children should be supervised by a person responsible for their
safety to ensure that they do not play with the appliance.
Appliance handover
Explain the functions of the appliance to the user. Show the user how to operate
the appliance.
Make the user aware of potential dangers, especially the risk of scalding.
Hand over these instructions and, if applicable, the instructions for any
accessories.

16
TROUBLESHOOTING
Problem Cause Remedy
No water flows Cold feed isolation valve
closed
Open Valve
Incorrect connection of
pipes
Correct error
Valve blocked Clean or replace valve
The appliance does not
supply hot
water.
The temperature
selector is set to
“LOW”.
Switch the appliance ON
by turning
the temperature selec-
t o r.
No power at the appli-
ance.
Check the plug / fuses in
the domestic
fuse box.
Appliance is switched off Turn appliance on
Loud boiling noises in-
side the appliance.
The appliance is scaled
up.
Have the appliance des-
caled by a
qualified contractor.
If you cannot remedy the fault, notify your qualified contractor. To facilitate and
speed up your enquiry, please provide the numbers from the type plate.

SAFETY
Only a qualified contractor should carry out installation, commis-
sioning, maintenance and repair of the appliance.
Instructions, standards and regulations
Note
Observe all applicable national and regional regulations and
instructions.
SHUTDOWN
Isolate the appliance from the power supply by switching off at the fused spur.
Drain the appliance (see chapter "Installation / Maintenance / Draining the appli-
ance").
17

18
MAINTENANCE
WARNING Electrocution
Before any work on the appliance, disconnect all poles of the
appliance from the power supply.
Dismantle the appliance for maintenance work.
WARNING Burns
Hot water may escape during draining.
To drain the appliance
1. Isolate the supply and run water until the water discharging from the
tap is cold.
2. Leave the hot tap open.
3. Close the cold feed isolation valve.
4. Open the discharge safety valve and allow the water to drain from the
appliance.
5. When the flow stops disconnect the appliance from the hot and cold
feed pipe connections.
Material loses
NOTE. Some water will drain from the pipe so ensure suitable
method for catching the water is used.
Water contains micro-impurity and mineral substances.
Deposits will occur on the bottom of the water heater inner vessel. The water
heater should be emptied to remove the deposits.
Generally, the heater should be cleaned once per year. For areas of poor water
quality or high levels of water hardness, the cleaning should be conducted more
frequently.
The unit is fitted with a magnesium anode. This should be replaced when worn.
The anode should only be replaced by trained service engineer.

Country-specific approvals and certifications
The test symbols can be seen on the type plate.
Extreme operating and fault conditions
In the case of faults, a peak temperature up to 100 °C may briefly occur
in the system.
Details on energy consumption
The product data complies with EU regulations relating to the directive
on the ecological design of energy related products (ErP).
Heat-up performance
The heat-up period depends on the degree of scaling and residual heat.
Using a cold water supply at 10 °C and a maximum temperature setting
60oC will be achieved in 8 minutes
HEAT UP PROFILE
19