Danfoss HDU-SF User manual

MAKING MODERN LIVING POSSIBLE
Service Guide
HDU-SF (Horizontal Distribution Units - Single Flat)
www.heating.danfoss.com

Danfoss A/S is not liable or bound by warranty if these
instructions are not adhered to during installation or service.
The English language is used for the original instructions.
Other languages are a translation of the original instructions.
(Directive 2006/42/EC)
© 2012 Copyright Danfoss A/S

Table of Contents
1 Introduction .................................................................... 3
1.1 Overview .................................................................. 3
1.2 Technical Data ............................................................... 4
1.3 Accessories and Spare Parts ...................................................... 4
2Drain and Vent .................................................................. 4
3Replacing the Strainer Filter ......................................................... 5
4Shutting off the Flow .............................................................. 5
5Heat Meter ..................................................................... 5
5.1 General .................................................................... 5
5.2 Power Supply ................................................................ 6
5.3 Operation .................................................................. 6
5.4 Display Indications ............................................................ 7
5.5 Error Codes ................................................................. 8
5.6 Extension Modules ............................................................ 8
6Replacing the Heat Meter ........................................................... 11
1 Introduction
1.1 Overview


















HDU-SF single-port HDU-SF multi-port
1. Ball valve for in- and outlet connection to the riser.
2. Strainer to trap dirt, sand etc. from pipe water (replacement filter available as accessory).
3. AB-PM automatic balancing valve, combines three functions: differential pressure controller, control valve with linear characteristic and
flow limiter.
4. Manifold for radiator connection, flow.
5. Manifold for radiator connection, return.
6. Automatic air vent and drainage (both inlet and outlet has drainage and air vent possibilities).
7. Heat meter for energy measuring, with 8-digit LCD.
8. Cabinet.
Service Guide HDU-SF (Horizontal Distribution Units - Single Flat)
Danfoss Heating Solutions VIIGB102 3

Note! HDU-SF are available with left or right side connections to riser. In this Service Guide all illustrations are shown for the left side
version.
1.2 Technical Data
Max. temperature 90 °C
Max. working pressure 2 bar
Nominal required differential pressure over Unit (HDU-SF) 0.26 bar*
Max. differential pressure in a control loop 0.22 bar
Max. static pressure 10 bar (PN 10)
Connection to riser (in and out) R 3/4"
Connection to radiator 3/4"
Power supply (Heat meter) A-cell battery, 3.6 VDC
* At differential pressure in control loop 10kPa at 100% AB-PM set-
ting.
1.3 Accessories and Spare Parts
Product Code no.
Manifold port plugs (10 pcs.) 003L1246
Filter for strainer 065B8248
Impulse tube with fittings for AB-PM 003L8152
2 Drain and Vent
For draining the inlet and outlet:
▪close ball valves on supply and return inlet pipes.
▪use the cap hanging on the drain to open the drain.
The HDU-SF is automatically vented, if necessary.
VIIGB102 Danfoss Heating Solutions
4
Service Guide HDU-SF (Horizontal Distribution Units - Single Flat)

3 Replacing the Strainer Filter
1. Close ball valves on supply and return inlet pipes.
2. Close all inlet manifold circuits after the AB-PM, using a 5 mm Al-
len key.
3. Remove the strainer cap and replace the filter.





4 Shutting off the Flow
1. Close both ball valves to shut off all radiator circuits in the apart-
ment.
2. Use the manual shut off in the manifold to close a single radiator
circuit., using a 5 mm Allen key. Make sure to close both inlet and
outlet for the circuit.





5 Heat Meter
5.1 General
SONOMETER™1100 Heat meter
Made in Germany
3030716
087G6103
Installation: high temp.
S/N: 41598383
qs: 5m3/h
qp: 2.5m3/h
qi: 0.025m3/h
PS/PN: 16
DN20 IP54
Θq: 5...130°C
Θ: 1....180°C
ΔΘ: 3...177K
Pt 500
class 2
E1 / M1
P.-Year 2012
GPM
V
T T
-V
The following guidelinesmust be observed:
▪The cables supplied with the meter must not be shortened or changed in any other way.
▪The regulations on the use of energy meters must be observed!
▪The meter installation is only to be performed by an authorized installer and/or electrical contractor using personnel trained in the
installation and use of electrical equipment and familiar with the Low Voltage Directive.
▪The specified operating/ambient conditions are 5 … 55 °C; IP54; 93 % rel. humidity.
The IZAR@SET software is used for readout/parametrization.
Danfoss Heating Solutions VIIGB102 5
Service Guide HDU-SF (Horizontal Distribution Units - Single Flat)

5.2 Power Supply
▪A 3.6 V DC lithium battery is fitted in the heat meter.
▪The battery is not to be charged or short-circuited.
▪Ambient temperatures below 40 °C extend the life of the battery.
▪Used batteries must be disposed of according to the applicable regulations.
Caution!
Risk of explosion if the battery is replaced by an incorrect type.
5.3 Operation
Display
The meter readings are displayed with units and symbols on an 8-digit LCD.
1. Quadrant display
2. Loop display
3. Tarif enrgy
4. Error symbol
5. Maximum values
6. Flow rate indicator
GPM
V
T T
-V

Simple operation
A pushbutton mounted on the front of the meter is used to switch to the
various displays.
To show the data read out by the integrator in the display (e.g. amount of
energy, operating hours, volume of water, current temperatures, …)., vari-
ous windows that can be called up in succession are used.
The meter has 6 different display loops: main loop, set day loop, informa-
tion loop, pulse input loop, tariff loop and month loop.
The window content of each loop is programmed with the standard infor-
mation ex works. Various display windows comprise two (seven) displays
that change successively at intervals of 2 - 4 s. The loops in the display are
numbered from 1 to 6 to help the user find his way around quickly. The
main loop (loop 1) is programmed with the current data as default setting,
e.g. for energy, volume, flow rate.
A few fragments of the loops or even whole loops can be turned off, using
the IZAR@SET software. It simplifies arrangement of the windows.
ΔT
-V

1. Loop display (for loop 1)
The pushbutton is used to switch through the various displays. The button can be pressed for a short or a long time:
Button press Result
Short press (< 3 seconds) Switches to the next display within a loop
Long press (> 3 seconds) Switches to the next display loop
Button not pressed for 4 minutes Meter switches off the display automatically (to save power, but only if no error exists)
Button pressed again Meter shows the basic display
VIIGB102 Danfoss Heating Solutions
6
Service Guide HDU-SF (Horizontal Distribution Units - Single Flat)

5.4 Display Indications
Loop Sequence Window 1 Window 2
"1"
Main loop 1.1 Accumulated energy
1.2 Volume
1.3 Flow
1.4 Power
1.5 Forward temperature Return temperature
1.6 Difference temperature
1.7 Operating days
1.9 Error status
1.10 Display test
Loop Sequence Window 1 Window 2 Window 3
"2"
Accounting date loop 2.1 Accounting date 1 (date 1) Accounting date 1 energy 'Accd 1A'
2.2 Next accounting date 1 (date 1) Next accounting date 1 energy 'Accd 1L'
2.3 Previous accounting date 1 (date 1) Previous accounting date 1 energy 'Accd 1'
2.4 'Accd 1' Date of next accounting date 1
2.5 Accounting date 2 (date 2) Accounting date 2 energy 'Accd 2A'
2.6 Next accounting date 2 (date 2) Next accounting date 2 energy 'Accd 2L'
2.7 Previous accounting date 2 (date 2) Previous accounting date 2 energy 'Accd 2'
2.8 'Accd 2' Date of next accounting date 2
Loop Sequence Window 1 Window 2
"3"
Info loop 3.1 Current date
3.2 'SEC_Adr' Secondary address
3.3 'Pri_Adr 1' Primary address 1
3.4 'Pri_Adr 2' Primary address 2
3.5 Installation position
3.6 'Port 1' No. of the mounted module at port 1
3.7 'Port 2' No. of the mounted module at port 2
3.8 Status integrated radio (Sequence will be shown only in meters with integrated radio)
3.9 No. of error hours
3.10 'F01-001' (software version) Checksum
Loop Sequence Window 1 Window 2 Window 3
"4"
Pulse input loop 4.1 'In1' Accumulated values pulse input 1 'PPI' pulse value 1
4.2 'In2' Accumulated values pulse input 2 'PPI' pulse value 2
Loop Se-
quence Window 1 Window 2 Window 3 Window 4 Window 5 Window 6 Window 7
"5"
Tariff loop The tariff loop is switched off as a standard at the heat meter or meter for cooling.
Loop Se-
quence Window 1 Window 2 Window 3 Window 4 Window 5 Window 6
"6"
Monthly value loop 6.1 'Date last month' Accumulated ener- gy Energy Tariff 1 Tariff 2 Volume
6.2 'Date month - 1' date month - 1 Energy Tariff 1 Tariff 2 Volume
6.3 'Date month - 2' date month - 2 Energy Tariff 1 Tariff 2 Volume
...
... ...
6.24 'Date month - 23' date month - 23 Energy Tariff 1 Tariff 2 Volume
Danfoss Heating Solutions VIIGB102 7
Service Guide HDU-SF (Horizontal Distribution Units - Single Flat)

5.5 Error Codes
The error code is displayed in the main loop if an error occurs.
The error display disappears automatically as soon as the cause of the error has been cleared. All errors present longer than 6 minutes
are saved in the error log.
Error display Error description
C - 1 Basic parameter error in flash or RAM
E 1 Temperature measuring error
▪temperature range exceeds [-9.9 C...190 C]
▪sensor short-circuit
▪sensor break
E 3 Forward and return sensor reversed
E 4 Hardware error in ultrasonic measurement
▪transducer/drive defective
▪transducer/drive short-circuit
E 5 Communication not possible (too frequent reading)
E 6 Wrong direction of flow in volume measuring component
E 7 No primary power supply (only if mains unit used)
Supply is via back-up battery
E 8 Warning! Battery almost flat. Battery should be replaced.
E 9 Warning! Battery almost flat. Battery should be replaced.
E A* Leakage: pipe break detected
E b* Leakage: leakage detected in energy meter
E C* Leakage: leakage pulse input 1
E d* Leakage: leakage pulse input 2
* optional
5.6 Extension Modules
The Heat Meter has two slots for extension modules. These modules have no effect on consumption recording and can be fitted without
damaging the verification mark.:
Slot 1 Slot 2
Pulse In (2x) Pulse In (2x)
Pulse In (2x) / Out (1x) Pulse Out (2x)
RS232 Pulse In (2x) / Out (1x)
M-Bus RS232
RS485 M-Bus
L-BUS (for external radio) RS485
Analogue Out (4-20 mA) L-BUS (for external radio)
VIIGB102 Danfoss Heating Solutions
8
Service Guide HDU-SF (Horizontal Distribution Units - Single Flat)

Installation of modules
1. Open the integrator by releasing the side catches.
2. Engage the module in the relevant slot and carefully connect the pre-
formed ribbon cable at both ends.
3. Close the lid and check the meter for correct operation by pressing the
push button.
Attention!
Keep free at
radio version!
Slot 1
Slot 2
Test Output
Communication modules (upon order)
The meter supports two communication channels over the same or different interfaces. An additional communication module can be
used in radio operation. The protocol is different for each of the two channels and is preset ex works, but can be set to customer-specific
requirements using the IZAR@Set software.
Each channel has its own primary address, but only one secondary address exists, which is set to the serial number ex works.
M-Bus
The M-Bus communication module is a serial interface for communication
with external M-Bus control centre. The module contains a 2-pole terminal
strip with terminals marked 24, 25, which are connected to M-Bus control
centre.
M-Bus protocol to EN 1434-3 standard:
▪Connection for 2 x 2.5 mm² wires
▪The connection is electrically isolated
▪Current drawn: one M-Bus load
L-Bus
The L-Bus module is an adapter for an external radio module. Packet length can be configured, conforms to EN1434-3. Data reading
and parametrization are carried out using two-wire scheme with different polarity.
Communication over radio
The integrated radio module is an interface for communication with Hydrometer radio receivers.
Unidirectional communication has the following specification:
▪The module sends every 6 ... 25 s (variable, depending on protocol length)
▪The radio module always accesses the current meter registers
▪Transmission frequency: 868 MHz or 434 MHz
▪Various Hydrometer receivers are available for receiving the protocol (e.g. Bluetooth, GPRS, LAN, …)
▪The protocol corresponds to the Open Metering or HYD standard and is encrypted
▪Reading modes: walk-by, drive-by, fixed network
RS232 communication module
The RS232 communication module is a serial interface for communication
with external devices, e.g. PC.
The module contains a 3-pole terminal strip with terminals marked 62(Dat),
63(Req) and 64(GND). A special adapter cable is required for connection
(order no. 087H0121). The coloured wires are to be connected as shown:
▪62 = brown
▪63 = white
▪64 = green
Danfoss Heating Solutions VIIGB102 9
Service Guide HDU-SF (Horizontal Distribution Units - Single Flat)

RS485 communication module
The RS485 communication module is a serial interface for communication
with external devices, e.g. PC.
The module contains a 4-pole terminal strip with terminals marked D+, D-
und +12-. The module needs an external power supply of 12 V DC ±5 V.
Pulse input function module
Module for two additional pulse counters. The module contains a 4-pole
terminal strip with pulse input 1 marked as “I1 - |_” and input 2 as “I2 - |_”.
▪Pulse inputs 1 and 2 are programmable for a value of: 1, 2.5, 10, 25,
100, 250, 1000, 2500 litres per pulse.
▪Possible units are all the energy units available in the meter, the vol-
ume unit m³ or no unit
▪Input frequency is in the range < 8 Hz.
Min. pulse duration 10 ms.
▪Input resistance 2.2 MΩ.
Terminal voltage 3 V DC.
▪Data is accumulated separately in registers
▪Data is readable as IN1 and IN2 in the display and can be transmitted
over the communication modules
▪Cable length up to 10 m
Pulse output function module
The module contains connections for 2 pulse outputs, , proportional to the
flow or heat consumption. The module contains a 4-pole terminal strip with
pulse input 1 marked as “O1 - |_” and input 2 as “O2 - |_”.
External supply: Vcc = 3-30 V DC
Output current < 20 mA with a residual voltage of < 0.5 V Open collector
(drain) Electrically isolated Output 1: f < 4 Hz
Pulse duration: 125 ms ±10 %
Pulse break: > 125 ms –10 %
Output 1:
▪Output frequency: f < 4 Hz
▪Pulse duration: 125 ms ±10 %
▪Pulse break: > 125 ms –10 %
Output 2:
▪Output frequency: f < 100 Hz
▪Pulse duration
▪Pulse break ~1:1
▪Volume pulse value is programmable as desired
Vcc
Pulse
GND
Pulse
output
module
Energy external
meter
VIIGB102 Danfoss Heating Solutions
10
Service Guide HDU-SF (Horizontal Distribution Units - Single Flat)