Elster F90S User manual

Page 1
Elster Messtechnik GmbH, Otto-Hahn-Straße 25, 68623 Lampertheim
Tel: [phone], Fax: [phone], www.elstermesstechnik.com
Artikel-Nr. 0080141141 - 2011-03-02 (F90S_M_09.01e/03.11)
Compact single-jet heat meter
F90S
Installation and Operating Instructions
3 General Information
• The valid standard for the application of heat meters is EN 1434,
parts 1 + 6. The regulations for electrical installations are to be
observed.
• The product meets the requirements relating to emissions in the
European Council Directive on EMC 2004/108/EC.
• The measurement stability of the heat meters is only guaranteed
when the quality of the water meets the conditions as specified
in the AGFW Recommendation FW-510. In the case that the
compostion or consistency of the water deviates from these
requirements, the heat meters must be inspected and refurbished
regularly by the manufacturer.
• The instrument identification and the seals must not be damaged
or removed – otherwise the guarantee and the approved
application of the instrument no longer apply.
• The heat meter left the factory in conformance with all applicable
safety regulations. All maintenance and repair work is to be carried
out only by qualified and authorized technical personnel.
• The direct-mounted temperature sensor or the plug on the
temperature sensor installation point may not be altered in any
way, in particular the sealing wire must not be removed.
• The instrument must be stored and transported at above-freezing
temperatures. The storage and/or ambient temperature must not
fall below 5°C.
• All details and specifications listed on the data sheet of the heat
meter must be adhered to.
• All electrical connections must be laid at a minimum distance of
50 cm to sources of electromagnetic interference (switches,
controllers, pumps, etc.). All instrument connections must be laid
at a minimum distance of 10 cm to other current-carrying wires.
• The temperature sensor cables must not be kinked, rolled up,
lengthened or shortened.
• Instruments with a return-flow temperature sensor mounted
directly in the flow sensor may only be mounted in the return flow.
4 Mounting the Flow Sensor
• To protect against damage and dirt the heat meter should only be
removed from the packaging directly before installation.
• For meters with two declarations on the identification plate, such
as: Q ≥100l/h ∆T: 3-100 K / Q ≥20l/h ∆T: 6-100 K the declaration
that is not valid for the local installation situation must be made
unrecognizable;
for example, for floor heating:
Q ≥100l/h ∆T: 3-100 K / Q ≥20l/h ∆T: 6-100 K
for example, for radiator heating:
Q ≥100l/h ∆T: 3-100 K / Q ≥20l/h ∆T: 6-100 K
• To clean the heat meter (only if necessary) use a slightly moist
(not dripping wet!) cloth.
• If more than one heat meter is installed in one unit, care must
be taken to ensure that all the meters have the same installation
conditions.
• Pay attention to the installation point of the heat meter:
standard: in the return flow pipe
optional: in the forward flow pipe (state when ordering)
1 Application and Function
This single-jet compact heat meter F90S type ESH is designed
for measurement of the consumed heat energy in a closed heating
system.
2 Scope of Delivery
1. Heat meter, consisting of a calculator, flow sensor and two
temperature sensors, all permanently connected to each
other.
2. Installation kit
3. Installation kit wall support (only F90S separable version)
4. Installation and Operating Instructions
– Flush the pipes according to DIN/EN
– Close the shut-off valves
– Open the nearest draining valve for pressure release and drain
the closed-off pipe section.
– Loosen the coupling ring and remove the old heat meter
– Remove all old gaskets
– Clean the sealing surfaces
– Insert new gaskets
– Position the flow sensor correctly, taking into account the
direction of flow (arrow on the side of the flow sensor)!
– Tighten the coupling rings
– Rotate the calculator into the correct reading position.
Note:
In order to simplify mounting in narrow
installation spaces the calculator can be
detached from the flow sensor.
Only for the separable version.
To detach the calculator, press on the
lateral surfaces shown in the illustration
and carefully lift off the top part of the
housing.
6 Start of Operation
• Slowly open the shut-off valves
• Check that the meter is functioning properly and that there are
no leaks
After confirming that the heat meter is functioning properly, insert
and tighten the sealing wires for the temperature sensors and the
flow sensor itself.
When replacing a meter at the end of a verification period note the
meter readings and the serial numbers of the old and new meters.
Check the following points:
• Is the heat meter of the right size?
• Are the shut-off valves open?
• Is the heating system clear (dirt filters not clogged?)
• Are the temperature sensors and the flow sensor sealed (against
manipulation)?
• Is the directional arrow on the flow sensor in the correct
direction?
• Is a flow volume displayed?
• Is a plausible temperature difference displayed?
• For instruments with two external temperature sensors, is the
forward flow sensor (red) in the forward flow and the return flow
sensor (blue) in return flow pipe?
• For instruments with an integrated return flow temperature
sensor, check the flow sensor is installed in the return flow.

Page 2
Elster Messtechnik GmbH, Otto-Hahn-Straße 25, 68623 Lampertheim
Tel: [phone], Fax: [phone], www.elstermesstechnik.com
Artikel-Nr. 0080141141 - 2011-03-02 (F90S_M_09.01e/03.11)
2. Level / Technician`s Loop
1. Level / Main Loop
3. Level / Statistics Loop
*) Up to the end of the month the consuption and reading date for that month will
be shown as 0.
8 Technical Data
Calculator
Ambient temperature °C 5 ... 55
Temperature range °C 1 ... 150
Temperature difference K 3 ... 100
Power supply 3V, lithium
Lifetime of battery 6 + 1 year
Data storage E2PROM/daily
Display 8-digits + special characters
Interfaces
standard infrared
optional M-bus or
pulse output
6 Mounting the Temperature Sensors
For pipe systems of size ≤DN25 the MID regulations require direct
mounting of the temperature sensors for new installations (new
construction, or retrofitted heating systems).
Note:
During installation be sure that the return flow sensor (blue label)
is mounted in the „colder pipe“ and the forward flow sensor (red
label) in the „warmer pipe“.
7 Display
The calculator has a liquid crystal display with 8 digits and spe-
cial characters. The values that can be shown are divided into
three display loops. All data is retrieved using the Engelmann
pushbutton next to the display.
The standard display is the total heat energy consumed since the
meter was put into operation.
At the start you are automatically in the main loop (1st level). By
pressing the key longer than 4 seconds you change to the next
display loop. Keep the key pressed until you reach the disired
information loop. By pressing the key briefly you can scan all the
information within a loop.
After one minute of non-use of the Engelmann pushbutton, the
display automatically returns to the main loop.
1.) Total heat energy
in MWh
– standard display – 3.) Heat energy at last
billing date alterna-
ting with last billing
date1)
5.) Current power
in kW
2.) Segment test, all
segments triggered
simultaneously
4). Total volume in
m3
7.) Current
date
6.) Current flow
in m3/h
8.) Error message (alternating
binary and hexadecimal
display)
1.) Maximum power
in kW
4.) Return flow
temperature in oC
3.)Forward flow
temperature in oC
5.) Temperature
difference
6.) Days in operation
since verification
2.) Maximum flow
in m3/h
8.) M-Bus address 9.) Serial number of
the heat meter
10.) Firmware/Soft-
ware version
7.) Pulse value;
pulses per liter
1.) Heat energy at previous
billing date alternating with
that billing date 1)
2. - 16.) 15 monthly energy
values alternating with the
corresponding reading
dates 1)
6.2 Installation in temperature pockets
• Before installation the inner diameter of the
temperature pocket must be checked with a
suitable caliber (5.0; 5.2 and 6.0 mm).
• Only temperature sensors with the
matching diameter may be installed in the
temperature pocket.
• No adapters or reducing bushes may be
used. The protective sheath of the tempera-
ture sensor must be inserted at least 36 mm
into the pocket.
• Remove the O-ring from the temperature
sensor and insert it carefully into the tempe-
rature pocket, ensuring that it sits properly.
• Insert the temperature sensor into the pocket
as far as it will go (to the stop).
The temperature sensor must now be sitting
on the bottom of the temperature pocket.
• Tighten the screw nut on the temperature
sensor into the pocket as tight as
possible.
6.1 Direct mounting (ball valve and T-piece)
• Remove the blind plug/old temperature
sensor and gasket/old O-ring. Clean
connection surfaces.
• Slide the O-ring off the temperature sensor
and insert it to the bottom of the threaded
opening of the ball valve or the T-piece.
• Set the required mounting depth of the tip
of the temperature sensor by tightening the
cross-head screw in the correct beading on
the sheath.
• The temperature sensor must not touch the
bottom of the ball valve or T-piece.
• Insert the temperature sensor into the ball
valve or the T-piece and tighten the screw
nut to the stop.

Page 3
Elster Messtechnik GmbH, Otto-Hahn-Straße 25, 68623 Lampertheim
Tel: [phone], Fax: [phone], www.elstermesstechnik.com
Artikel-Nr. 0080141141 - 2011-03-02 (F90S_M_09.01e/03.11)
10 Interfaces and Options
10.1 Optical (infrared) interface
In order for a PC to be able to communicate with a
F90S -instru-
ment, it is necessary to connect an optocoupler to the
corresponding interface of the PC. The optocoupler and the
necessary software are available as options.
The optical infrared interface is activated with the key.
If within 60 seconds neither a valid telegram is received nor the
key pressed again, then the interface is deactivated.
10.2 M-bus
An M-bus interface is also available on request.
It is important to ensure that the structure of the bus network
(length of connecting cables, cable diameter) corresponds to
the baud rate (2400 Bd) of the instrument connecte.
The M-bus protocol complies with standard EN 13757-2,
EN 13757-3, EN 1434-3, with the M-bus Recommendation
(version 4.8 dated Nov. 1997), standard ICE870 ports 1,2 and 4.
During communication with a heat meter via M-bus the other
instrument interfaces (key, opto head) cannot be used.
Note:
• Each end instrument is only protected against high voltage up
to the maximal allowed bus voltage (±50V). Additional protecti-
ve measures must be provided by the level converter.
• In a 250-slave M-bus network (maximum 250 heat meters),
24 requests per day are possible for each meter. If fewer
requests are made and/or fewer heat meters are connected
to the bus, the unused amount of available requests is stored
in the instrument (max. amount: 300 requests).
• The installation of an instrument in an M-bus network may
only be carried out by authorized, qualified technical
personnel.
Recommended cable type:
Telephone cable J-Y(ST) Y2 x 2 x 0,8 mm2
10.3. Pulse output (potential-free)
The potential-free pulse output available as a built-in
option (state when ordering) of the F90S is an electronic switch
for flexible use (class A0 according to EN1434), which outputs the
counting pulses of the heat meter.
The pulse output closes corresponding to the pulse value (see the
identification plate on the instrument). As long as the nominal and
boundary values of the contact are taken into consideration, the
user is free to define his contact data within a wide range. A wide
variety of data acquisition instruments can be connected to the
contact outputs.
The pulse value is indicated on the instrument.
Pulse value:
Heat: 1kWh/Imp or optional
Volume: 100 L/Imp
Details Flow sensor 0.6 1.5 2.5
Nominal flow qpm³/h 0.6 1.5 2.5
Max. flow m³/h 1.2 3.0 5.0
Pressure drop ∆p at qpmbar 160 196 165
Max. flow KVat ∆p
= 1 bar (Important: Not
permissible in operation!)
m
3
/h 1.5 3.5 6.3
Pressure drop MAP/PN bar 16
Low flow
threshold
horizontal l/h 3,5 7 10
vertical 4 7 10
External thread G3/4B G1B
Installation lenght mm 110 130
Temperature range °C 15 ... 90
Mounting position horizontal; vertical
Color code
(SensoStar2+) blue red black
Details Temperature sensors
Type PT500 platinum precision resistor
Connection 2 wire technique
Diameter mm 5.0 (optional 5.2)
Length of connecting
cables m 1.5 (optional 3.0)
9 Error Codes
When the instrument detects an error, the error symbol
and number are displayed.
The error can also be displayed by selecting the menu
item 8) ‘error display’ in the first level / main loop (see
no. 7. Display).
There are seven possible causes of error, and they can appear in
combination with each other, depending on the situation.
The discription of the faults can you see over the display.
Example: Scanning coil fault
Error
Errorcode
Binary display
LCD
electronic fault
electronic fault
Reset
RF sensor fault
scanning coil fault
VF sensor fault
Errorcode
hexadecimal
( LCD)
When an error occurs in the standard display (Total heat
energy), with the exception of the „reset“ error, the instrument
must be exchanged and sent to the manufacturer for examination.
Pulse output:
Max. switching current (peak) 300 mA ~/-
Max. switching voltage 35 V ~/-
Max. switching power 300 mW
Insulation resistance > 1009 Ohm
Contact resistance max. 25 Ohm
Contact capacity 1.5 pF
Maximum current 120 mA
Dielectric strength (open contact) 350 V ~/-
Closing time 125 ms
Distance between pulse 125 ms
Display
binär Description Display hexadecimal
1 at 1st position electronic fault error 40
1 at 2nd position electronic fault error 20
1 at 3rd position Reset error 10
1 at 4th position scanning coil fault error 08
1 at 5th position electronic fault error 04
1 at 6th position RF-sensor fault error 02
1 at 7th position FF-sensor fault error 01
electronic fault

Page 4
Elster Messtechnik GmbH, Otto-Hahn-Straße 25, 68623 Lampertheim
Tel: [phone], Fax: [phone], www.elstermesstechnik.com
Artikel-Nr. 0080141141 - 2011-03-02 (F90S_M_09.01e/03.11)
Important:
Mounting only for instruments with detachable calculators!
A. Mounting with a sticker pad
Press the locking positions on the side of the adapter lightly with
one hand while pulling up the calculator housing with the other
hand.
Latch the wall mounting support onto instrument. Remove the
protective foil from the sticker pad and press the pad firmly onto
the wall support.
Remove the second protective foil from the sticker pad and press
the instrument with the wall mounting suport firmly in place on the
wall.
B. Mounting with dowels
Press the locking positions on the side of the adapter lightly with
one hand while pulling up the calculator housing with the other
hand.
Drill holes for the dowels (Ø 6 mm, depth 40 mm). Take into
account the maximum length of the connecting cable (300 mm)
between the flow sensor and the heat meter.
Screw on the wall mounting support.
Attach the instrument to the mounting support.
C. Removing the heat meter from the mounting support
Pull the instrument upwards and away from the wall.
Subject to technical change!
Return shipment of the lithium batteries must be carried out
appropriately.
The wall mounting kit included in delivery:
2 screws
2 dowels
1 double-sided sticker pad
1 wall mounting support
11 Mounting with wall support
When the calculator is detached from the flow sensor it
can be mounted on the wall using the mounting support.
If possible, place the wall mounting support above the flow sen-
sor.The display must remain accessible and able to be read out
without auxiliary tools.