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HyBo - Hydraulic Interface Unit
DOMESTIC HOT WATER PRODUCTION FOR
CENTRAL HEATING SYSTEM UNIT CODE EHIU3
INSTALLATION, COMMISSIONING AND OPERATING INSTRUCTIONS
Contents
50094858-001 Rev. A
Contents ..................................................................................................1
Safety Guidelines ....................................................................................2
General Warnings ...........................................................................2
Before Installation ...................................................................................2
Wiring .......................................................................................................2
Description ..............................................................................................2
Dimensions and details .........................................................................3
Hydraulic diagram ...................................................................................3
Technical data .........................................................................................3
Mounting ..................................................................................................4
Front panel dismounting-mounting ..............................................4
Wall mounting .................................................................................4
Fixing electrical cables ...........................................................................5
Electrical connections ............................................................................5
Activation .................................................................................................5
Display and keypad ........................................................................5
Programming for Technician .........................................................6
Deactivation of unit functions .......................................................6
Unit electrical disconnection .........................................................6
Control and regulations .........................................................................6
DHW temperature ...........................................................................6
Balancing .................................................................................................7
Backflow preventer .................................................................................7
Unit Components ....................................................................................7
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Safety Guidelines
Before Installation
General Warnings
WARNING
WARNING
The Installer has to check that unit fixing systems are suitable to
mounting wall.
Honeywell Hydraulic Interface Unit must be installed by qualified
personnel in accordance with the applicable regulations and IEE
Regulations.
This equipment must only be used for the purpose for which it was
intended, improper use may be hazardous.
The end user is not authorized to work on the unit. Any contractual or
extra-contractual responsibilities of the Constructor is excluded for
damages to people, animals or things caused by an improper use or
by installation mistakes or special maintenance as well as by not qualified personnel intervention and, in general, by non-fulfilment of what
indicated in installation, commissioning and operating instructions.
1. Unpack and remove the EHIU3 from carton.
2. Check the equipment and report any damage to a Honeywell representative.
3. The unit must be fixed to the wall by using no. 4 Ø 8 mm anchors (not
included).
NOTE: Anchoring materials must be suitable for the mounting surface which
must comply with all local codes.
Honeywell take no responsibility for difficulties arising from failure to
observe these instructions. Please read this manual before undertaking the installation.
Wiring
Upon completion of the installation, please hand these instructions to
the user. These instructions should be retained for future reference.
CAUTION
M-Bus and electrical supply cables must be separated in order to
avoid any interferences.
WARNING
Honeywell EHIU3 is a wall hanging HIU with optional external casing.
If installed without external casing it must be placed in a protected
space not accessible by unqualified people. It has the capability to
produce instantaneous domestic hot water. Hot water is always
produced in priority to the heating service. The maximum temperature
of the domestic hot water may be adjusted by accessing the digital
display unit which is positioned within the casing.
CAUTION
All electrical connection must be compliant with local laws, rules and
regulations.
The unit needs a 230V 50Hz electrical connection.
Description
WARNING
Risk of scalding!
CAUTION
Even in normal operating conditions unit reaches high temperatures
that can cause burns. It is risky to touch the pipes without protection.
Notices about domestic hot water
If the supply water hardness exceeds 15°f (dGH) it is recommended
to install a suitable scale reducing device (softener). In order to
reduce scale forming inside heat exchanger, set the sanitary water
temperature to a value that is slightly superior compared to the operating one.
WARNING
Risk of electric shock or equipment damage!
Before installation and any maintenance operation disconnect electrical supply.
pH value should be between 7 ~ 9.
For device disconnection use a circuit breaker or a plug.
Do not reconnect the power supply until you have completed the
installation. In general before any operation disconnect power supply.
Device doesn´t requires any maintenance.
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Dimensions and details
Technical data
Power supply 230V AC
Heating Circuit
Water VDI2035
max. glycol 30%
42
Kind of fluid
94,4
70
70 70
458,8
152,7
Max. temperature
90°C
Max. operating pressure
6 bar
Domestic water line
430
Kind of fluid
a
b
c
Water max hardness 15dGH and pH 7-9
Max.temperature
30°C
Max. operating pressure
6 bar
Max. flow rate
1.5 m3/h
Nominal flow rate
1.25 m3/h
DHW / Exchanger Secondary Circuit
d
Kind of fluid
1. Power supply 230V AC
Max. setting temperature
Hydraulic diagram
Max. operating pressure
Water max hardness 15dGH and pH 7-9
60°C
6 bar
DHW production flow activation
3.5 l/min
DHW production flow
deactivation
2.5 l/min
Display approximation
1°C
Max. flow rate
22l/min*
Pipes
Material
Size
Copper
∅18 mm
Hydraulic connections
Material
1
2
3
4
5
6
7
Manual isolation valve (not supplied)
Plate heat exchanger
Modulating motorized valve
Flow sensor
Manual air vent
Temperature sensor
Electric box
A
B
C
D
Hot sanitary water outlet
Supply from centralized system
Cold sanitary water inlet
Return to centralized system
Size
Brass
G 3/4" M
Template box
Material
Galvanized sheet 1 mm
Casing and door
Material
pickling sheet 1 mm
Colour
RAL 9010
Electrical supply
Voltage
230V +/- 10%
Frequency
50 Hz
Max. power consumption
10W
IP protection
20
Ambient operation
Installation
Indoor
Ambient temperature range
5-55°C
Humidity range
25-85%
Motorized Valve
Operation time Modulating type
15 sec
* Physical limit for quite operation. Real max flow depends on target system
parameters.
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Mounting
The figures/table below indicates kv values of the unit.
Front panel dismounting-mounting
Front panel can easily be mounted / dismounted by four screws as indicated
in the picture below.
a
a
b
c
d
b
c
d
Hot sanitary water outlet
Supply from centralized system
Cold sanitary water inlet
Return to centralized system
kv (m3/h with Δp = 100 kPa = 1 bar)
Circuit
B-D primary circuit
C-A secondary circuit
Wall mounting
kvs-values
kvs calculated
2.2 m3/h
1.9 m3/h
The unit has to be installed indoors in suitable ambient conditions (see technical specification on page 3).
The installer has to individuate the most suitable wall according to weight and
overall dimensions indicated on page 3.
The general equation for calculating pressure drop, knowing flow rate value
is the following
For fixing unit it is necessary to use no. 4 Ø 8 mm anchors (not included), they
have to be suitable to the chosen wall for installation. The position has to be
compliant with hydraulic connections.
Δp [bar] = (Q [m3/h] / kv)2
CAUTION
The unit can be mounted at position with bottom hydraulic connections (see
bellow picture).
300
40
The indicated kv are valid for water without glycol.
8.4
433.2
8.4
CAUTION
Before installing the unit, the centralised and apartment systems must
be cleansed and flushed to avoid fouling of the unit with impurities or
debris from the pipe work installation procedures. The presence of
impurities in pipes can be the reason for unsatisfactory working and
can cause possible damages to unit components. Therefore it is very
important to carefully flush pipes before installing.
Connecting the unit to centralized distribution system with
interception manual valves (included) is strongly recommended.
Thanks to this the unit could be quickly and without particular user
unease de-touched from centralized plant in case of special maintenance.
Take care not to damage or break the connection seals. Pipe connection torque must not exceed 50 Nm.
Hydraulic connection according to ISO 228/1 G3/4 M.
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Fixing electrical cables
Activation
The unit comes already equipped with an electric cable and a plug. To give
power to the unit simply connect the plug in a socket.
Once the installation is completed and after checking that all electric and
hydraulic connections have been correctly made, it is possible to active the
unit by a plug connection to electrical supply.
It is used for disconnection and interruption.
Electrical connections
CAUTION
Before carrying out electrical connections, please read general
instructions at page 1.
WARNING
Isolate the unit from the electrical supply before removing the cover
of the electrical box.
Display and keypad
WARNING
Display and keypad come in a separated box, as a separate product that
must be ordered separately (code EHIU-DISPLAY).
The unit must be connected to electrical supply for programming any
functions via separated keypad and display.
EHIU-DISPLAY can be easily connected with the included cable to the unit
electronic controller, as shown below. Once the operation with the display
and keypad is completed, unplug the Display and close the plastic controller
box with its cover.
Unit could be programmed by qualified persons in accordance with
the curent edition of the IEE regulations.
RISK OF ELECTRIC SHOCK
1. Open controller box
The LED lights on the right side of the digital display
indicate the actions of the hot water temperature
control system.
Red LED = Valve opening/open - the temperature of
the hot water is required to be raised
Green LED = Valve closing/closed - the temperature
of the hot water is required to be reduced
In order to turn it off, press the “ON/OFF” button: if the
equipment is still powered, the “OFF” sign will appear.
When the unit is electrically powered,the installed software version is shown on the display for a few
seconds.
2. Connect the Display to the unit and unit plug to electrical supply
Immediately after, if the equipment was off the last
time it was powered (default condition at the time of
purchase),the “OFF” message appears. In order to
turn it on, press the “D”-ON/OFF button once.
The display shows the temperature detected by the
sensor which is placed at the outlet of the domestic hot
water delivered to the dwelling. When a hot water tap
is opened, the unit will start automatically.
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Control and regulations
Programming for Technician
Access to programming menu. When digital display shows “OFF”, push
simultaneously “A” and “B” buttons. When display shows “P1” release
buttons. ”A and “B” buttons scroll main menu and increase or decrease value
in under menu. “ENTER” button goes into sub menu and save data itself.
Main menu Under menu
Function
P1
X.X (sec) Where „X.X“ indicates time of sampling
temperature.
Regulation range 1.0 ³ 10.0 sec
P2
X (sec)
Where „X“ indicates delay time ordered to
activation of sanitary hot water production by
flow meter signal (eco function)
Regulation range: 0 ³ 5 sec.
P3
XX (°C) Where „XX“ indicates the Δ temperature to
be added to the setpoint to obtain the
maximum permitted temperature beyond
which the sanitary valve closes. Anti-burns
function*.
Regulation range 5 ³ 50°C
P4
XX (sec) Where „XX“ indicates delay time ordered to
anti burns function intervention.
Regulation range 0 30 sec
P5
X
Where „X“ is a Boolean variable that can be:
0 = warmed heat exchanger function activated **
1 = warmed heat exchanger function deactivated
DHW temperature
When the unit is activated and the display shows the temperature detected
by the probe, it is possible to adjust the set supply temperature of the hot
sanitary water. Use the buttons on the keypad:
Press the “A” button to decrease the temperature
value. Press the “B” button to increase the temperature
value. The display will show a value ranging from 0 to
10. 0 corresponds to approximately 40°C, 10 corresponds to approximately 60°C. Then, press “ENTER”
to accept the value.
(*) Anti-burns function intervenes when the sensor, positioned on hot sanitary
water delivery, feels a temperature superior to “set-point + P3 value”. In this
condition the modulating 2-way valve, positioned on heat exchanger primary,
is forced to complete closure and interrupts the erogation of thermal energy.
When temperature goes down to “set-point + P3 value”, the system automatically starts normal production of sanitary hot water again.
(**) When warmed heat exchanger function is activated (P5 =0) the primary
circuit of the heat exchanger is constantly maintained in temperature (even
in absence of sanitary drawing) thanks to the passage of a small quantity of
hot water in primary circuit. This function can be activated when the unit is
away from distribution columns to reduce the DHW production delay time.
CAUTION
The anti-burns function helps to avoid supply of hot sanitary water
with dangerous temperatures. Installing devices for thermal safety for
sanitary uses to be placed below the unit is advised.
If the hot sanitary water temperature sensor is damaged or not
connected the display shows the allarm “ALt”. The modulating valve
of the plated exchanger primary circuit is forced to closing; the
flashing "AL t" is displayed. When the damage is restored the unit
start again with its normal functioning.
Deactivation of unit functions
Regarding sanitary function, excluding all takings is sufficient and the module
will automatically stop any energy inflow from centralized plant (if the warmed
heat exchanger is deactivated). Besides, pressing “ON/OFF” button on
keypad is possible to deactivate hydraulic unit functions. On display you find
“OFF” and all functions are deactivated:both motorized valves are on
complete closing
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Balancing
Backflow preventer
The unit is designed to work under project defined system parameters
(mainly primary and secondary circuit flows and temperatures), that must be
checked with Honeywell personnel before product choice.
As required by regulations insert a backflow preventer on the domestic cold
water inlet.
Backflow preventer is not included with the unit.
If real system parameters are different from defined system parameters the
unit cannot be able to provide the expected performance.
It is necessary to respect defined system parameters for all the units in the
building. For this purpose it is strongly recommended to take care of a proper
hydraulic system balancing.
Unit Components
Temperature sensor
Air valves
Heat exchanger
Pipes
Electronic controller
Modulating motorized valve
Cabinet
Flow meter
Passage for electric connections
LEGENDA
A
Hot sanitary water outlet
B
Supply from centralized system
C
Cold sanitary water inlet
D
Return to centralized system
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Environmental and Combustion Controls
Honeywell GmbH
Hardhofweg
74821 MOSBACH
GERMANY
Phone: +49 (6261) 810
Fax: +49 (6261) 81393
http://ecc.emea.honeywell.com
Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies Sàrl, Z.A. La
Pièce 16, 1180 Rolle, Switzerland or its Authorized Representative.
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Subject to change without notice
© 2014 Honeywell International Inc.