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HyBo - Hydraulic Interface Unit
AMBIENT HEATING AND DOMESTIC HOT WATER PRODUCTION FOR
CENTRAL HEATING SYSTEM UNIT CODE EHIU1
INSTALLATION, COMMISSIONING AND OPERATING INSTRUCTIONS
Contents
50093594-001 Rev. B
Unit as delivered
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
External casing 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
Spare parts ..............................................................................................7
Metering ...................................................................................................7
Backflow preventer .................................................................................7
Unit Components ....................................................................................7
Unit completed with optional components
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EN1H-2615GE25 R0914
HYBO - HYDRAULIC INTERFACE UNIT
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 EHIU1 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 EHIU1 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
provide the central heating and 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.
A suitable room thermostat clock/room thermostat with 230V 50 Hz
output must be provided and connected by the installer. The electronic board is protected by a 1 Ampere fuse.
The unit needs a 230V 50Hz electrical connection.
WARNING
Risk of scalding!
If the unit is installed inside the apartment, power supply must be sourced
from the apartment itself.
Even in normal operating conditions unit reaches high temperatures
that can cause burns. It is risky to touch the pipes without protection.
On the contrary, if the unit is installed in common locals, it is supplied by a
common central line.
WARNING
Description
Risk of electric shock or equipment damage!
CAUTION
Before installation and any maintenance operation disconnect electrical supply.
Notices about domestic hot water
For device disconnection use a circuit breaker or a plug.
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.
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.
pH value should be between 7 ~ 9.
If installation instructions are followed, required water quality is provided and
installed space is controlled. After 6 month of usage it is recommended just
to clean the strainer.
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Dimensions and details
Technical data
Heating Circuit
Kind of fluid
Water VDI2035
max. glycol 30%
Max. temperature
90°C
Max. operating pressure
6 bar
Domestic water line
Kind of fluid
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
1. Room thermostat 230V AC
Kind of fluid
2. 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
Size
Brass
G 3/4" M
Template box
Material
Galvanized sheet 1 mm
Casing and door
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Manual isolation valve
Plate heat exchanger
Manual air vent
Modulating motorized valve for DHW control
Static balancing valve
DHW sensor
On/Off motorized valve for heating control
DHW flow sensor
Filter
Pressure control probe holder
Blind pipe for water meter
Heat meter temperature probe holder
Blind pipe for water meter
Control panel
A
B
C
D
E
F
G
Return to centralized system
Supply from centralized system
Cold sanitary water inlet
Hot sanitary water outlet
Cold sanitary water outlet
Heating outlet to apartement
Heating return from apartement
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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 ON/OFF type
15 sec
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.
External casing dismounting-mounting
Before installation the external casing must be removed as indicated in the
image. The external casing is a unique piece placed on the carrying structure: it is fixed by 2 screws on superior part and 2 screws on inferior part. After
external casing removal and having placed it safely, it is possible to proceed
with the hydraulic unit installation.
kv (m3/h with Δp = 100 kPa = 1 bar)
Circuit
A-B primary heat
exchanger
Heat exchanger type
24P
40P
no meter
no meter
1.76mc/h
1.88mc/h
Circuit
(B-F) + (G-A) heating
Wall mounting
Balancing type
Static
no meter
2.68 mc/h
DPCV
no meter
2.18 mc/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.
Circuit
1.83 mc/h
5.06 mc/h
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.
*kvs values refer to the static balancing valve setted at 5.9 (pre-setting) and
at 1.5 for the DPCV
It is suggested to leave a free space of 10cm on left side for an easier access
to the strainer
C-D hot water
C-E cold water
The general equation for calculating pressure drop, knowing flow rate value
is the following
Δp [bar] = (Q [m3/h] / kv)2
CAUTION
The indicated kv are valid for water without glycol.
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.
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Fixing electrical cables
Activation
Power electrical and ambient thermostat cables enter the unit thanks to cable
glands on unit bottom side. Cable maximum diameter: 8 mm.
Once the installation is completed and after checking that all electric and
hydraulic connections have been correctly made, it is possible to activate the
unit by moving the bipolar switch on electric box to ON position.
Display and keypad
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
Cable terminals must be connected to related board inside the electrical box
( see “electrical connections”).
Green LED = Valve closing/closed - the temperature
of the hot water is required to be reduced
CAUTION
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.
Between cable glands and electrical box, cables must be positioned
in a way that avoids contact with copper pipes. Please use the
specific cable glands supplied.
Electrical connections
CAUTION
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.
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.
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.
WARNING
THIS APPLIANCE MUST BE GROUNDED.
Ground wire connection must be secured against releasing. The electrical installation must only carried out by competent persons in accordance with the current edition of the IEE regulations.
Supply Cable (L- - N)
3 x 1.5 mm2 cable heat resistance;
• line,
• neutral, blue sheathing
• ground, yellow/green sheathing
Room thermostat (T.A)
2 x 1.5 mm2 cable heat resistance.
This device must give power to “TA” terminal ends in order to power relay coil
positioned inside the electric board.
Working logic:
• 230V “TA” ends voltage: heating function activation (opened valve)
• 0V “TA” ends voltage: heating function deactivation (closed valve)
1. Fuse
2. Bipolar switch
3. Cable gland
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Programming for Technician
Deactivation of unit functions
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
(default 1.0 sec) for 24 plates heat exchanger
and 1.3 sec for 40 plates heat exchanger
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.
(default 0 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
(default 5°C)
P4
XX (sec) Where „XX“ indicates delay time ordered to
anti burns function intervention.
Regulation range 0 30 sec
(default 0 sec)
P5
X
Where „X“ is a Boolean variable that can be:
0 = warmed heat exchanger function activated **
1 = warmed heat exchanger function deactivated
(default 1)
During summer time, in order to deactivate heating function you have to set
the minimum temperature value on room thermostat or selecting “OFF”
mode, if present. 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
Unit electrical disconnection
To disconnect the unit from electrical network follow these instructions:
1.
2.
3.
4.
Electrically disconnect ambient thermostat
Press “ON/OFF” button on keypad
Wait for about 30 sec. in order to give time to motorized valves to close.
Check that the motorized valves are in closed position by checking directional arrow position
5. Move the bi-polar switch on electrical box to OFF position
WARNING
Electrical power coming from ambient thermostat is NOT interrupted by bi-polar switch. In order to complete disconnect the
hydraulic unit form electrical power interrupt ambient thermostat power.
CAUTION
A disconnection from electric network made without operating as
described above does not grant the complete hydraulic isolation of
the module from the whole plant. As a consequence the module could
still take and regulate heat even though not requested.
Control and regulations
DHW temperature
(*) 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 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.
(**) 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.
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Balancing
Metering
The unit is equipped with a static balancing valve. In addition can be added
the diaphragm for differential pressure balancing (not included with HIU).
The unit can be equipped with energy and water meters. Stub pieces are
arranged on the unit to facilitate the installation:
A probe is already installed on pipe "f" to facilitate the installation.
• remove the stub piece
See in picture below the suggest installation.
• install the meter (max torque 50Nm)
- original sealings installed with stub pieces must be replaced
- When installing display of ultrasonic heatmeter take care to use not too
long screws to avoid touching the pipe under
• connect temperature sensors in the pre-arranged probes
Heatmeter 1 will measure the total energy consumtpion both for heating and
domestic hot water production.
Heatmeter 2 will measure the energy consumption of apartment heating only.
Energy consumption only for domestic hot water production can be
measured as difference between heatmeter 1 and heatmeter 2.
CAUTION
Sharp edges could cause injury.
The Heat meter should be installed before the impulse copper tube of
diaphragm unit for dynamic balancing. Don't bend the tube to the
sharp angles - it may cause breaks.
Before installation of any meter take out the old washer, clean the
sealing surface and use new washer (not included).
Backflow preventer
As required by regulations insert a backflow preventer on the domestic cold
water inlet.
Backflow preventer is not included with the unit.
Unit Components
Heat exchanger (insulated)
Flow meter
Air valves
Electronic controller
Heatmeter 2 temperature probe
Static balancing valve
(pipe probe for upgrade to
automatic)
Strainer (behind heat exchanger)
ON/OFF motorized valve
Temperature sensor
for sanitary water
Modulating motorized valve
Place for heatmeter 1
Pipes (insulated)
Place for water meter
Support for ultrasonic heatmeters
Heatmeter 1 temperature probe
Place for heatmeter 2
Cabinet with door
Passage for electric connections
Stop valves
a
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b
c
d
7
e
f
g
EN1H-2615GE25 R0914
HYBO - HYDRAULIC INTERFACE UNIT
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.
EN1H-2615GE25 R0914
Subject to change without notice
© 2014 Honeywell International Inc.