Lowara Servitec Degassing Unit 1 Installation, Operating and Maintenance Instructions Declaration of Conformity Lowara pumps UK declare that the Servitec degassing unit conforms to the requirements of the Machinery Safety Directive 89/392/EEC. Conforming to the UK Health & Safety Requirements S.I. 1992 No 3073 S.I. 1994 No 2063 Water supply (Water fittings) regulations 1999 Simple pressure vessel directive 87/404/EEC Code of practice for heating and chilled water systems BS7074 (parts 1, 2 & 3) Signed: Position: Engineering manager Date: 14-08-12 Revision Clive Willmott Introduction This leaflet contains information to enable the safe installation and operation of the products mentioned above. The following instructions must be read and understood by all persons responsible for the installation, operation and maintenance of this product. Warning Symbols Safety instructions where noncompliance would affect safety. Safety instruction where electrical hazard is involved. Safety instruction where noncompliance could cause damage to the equipment. Instruction for safe us This product has been designed for collecting and boosting rain water in non potable water installations to the operating conditions shown. This product should not be installed until this leaflet has been studied carefully. Handling, transportation and installation of this equipment should only take place with the proper use of lifting equipment. This product must be stored in a frost-free dry environment. Noise Emission This equipment operates at a noise level lower than 70dBA.
Transcript
Lowara Servitec Degassing Unit
1
Installation, Operating and
Maintenance Instructions
Declaration of Conformity
Lowara pumps UK declare that the Servitec degassing unit conforms to the requirements of the Machinery
Safety Directive 89/392/EEC.
Conforming to the UK Health & Safety Requirements S.I. 1992 No 3073 S.I. 1994 No 2063
Water supply (Water fittings) regulations 1999
Simple pressure vessel directive 87/404/EEC
Code of practice for heating and chilled water systems BS7074 (parts 1, 2 & 3)
This leaflet contains information to enable the safe installation and operation of the products mentioned above.
The following instructions must be read and understood by all persons responsible for the installation, operation
and maintenance of this product.
Warning Symbols
Safety instructions where noncompliance would affect safety.
Safety instruction where electrical hazard is involved.
Safety instruction where noncompliance could cause damage to the equipment.
Instruction for safe us
This product has been designed for collecting and boosting rain water in non potable water
installations to the operating conditions shown.
This product should not be installed until this leaflet has been studied carefully.
Handling, transportation and installation of this equipment should only take place with the proper
use of lifting equipment.
This product must be stored in a frost-free dry environment.
Noise Emission
This equipment operates at a noise level lower than 70dBA.
Installation
The Lowara Servitec unit is despatched mounted on a wooden pallet and covered in a protective film, it is
recommended that the unit be retained in the protective packaging until the product is to be
installed. The unit will arrive pre-packaged and wired ready for installation.
This product has been fully run tested at our works under simulated site conditions. The unit
should be thoroughly checked for physical damage that may have been caused during transit.
If the unit is found to have damage it must be reported immediately and should not be installed.
The unit must be sited in a clean well ventilated area with good all round access, two fixing holes are
provided in the back plate allowing the unit to be wall mounted.
Electrical Connections
The cable used for the incoming supply must be of adequate size to carry the motor full load current. This is
shown on the duty plate. All non power caballing should be limited to 2.5mm².
All connections must be made using the appropriate wiring drawings for the equipment being
installed, with particular attention being paid to the supply voltages.
The supply voltage is shown on the set duty plate.
Never operate this product with the control panel front cover removed.
It is essential that this equipment is earthed to the building earth system.
Pumps operate at 230v 50Hz
All wiring should be arranged such that it enters the control section through the appropriate cable glands.
2
Important:Despite removing the mains plug, 230 V may still be present at terminal 10, 11 12, 13 and 14, and at parts of the circuit board.
Fuse
ElectronicsFuse
Motor
Designation Terminal Signal Note
Supply 1 PE(230 V) 2 N ’servitec’ is fully wired with a shock-proof plug
3 LMake-up motorized ball valve
4 Y15 N connected6 PE
Pump 7 M18 N connected9 PE
External make-up control
10 only for ’servitec levelcontrol’ mode 230 V wire on site11
Common message 12 NC(fl oating) 13 COM wire on site (optional)
14 NONot confi gured 15 +24 V DC not wired up16 E1Water shortage 17 +24 V DC not connected (jumper)switch 18 E1Pressure measure-ment transducer
19 +18 V connected20 AE
Terminal Diagram
System Connections
Connect the Lowara Servitec system inlet port (marked 1) to the return leg of the circulating
system maximum temperature 70˚C, connect the system outlet port (marked 2) down stream of
the inlet port, minimum distance 500mm The connections to the main pipe should be made at the
top or side of the pipe not the bottom, this is to prevent dirt being transferred to the Servitec.
3
500
Main current V circuit water
500
Main current V circuit water
Rich in gas
Low in gas
Rich in gas
Low in gas
From above
From below as an immersion tube
Butt-welded from the bottom not permitted
500
Rich in gas
Low in gas
At the side(horizontal and vertical assembly possible)
Mai
n cu
rren
t V
circ
uit w
ater
Make up water
Make up water is generally provided by a separate pressurisation unit placed in the system and
will work independently of the Lowara Servitec unit. In this case the water make up (port 3) can be
blanked off and not used. It is possible to connect a basic fill unit to the system for water make
which can be controlled by the Servitec unit, in this case the fill unit outlet should be connected the
Servitec make up port (Marked 3) maximum pressure 6 bar. The appropriate electrical connections
will also need to be made.
Initial start up
1. Check that the electrical connections are all made in accordance with local bylaws.
2. Check that the system connections have been made and the isolation valves are open.
3. Check that the pipe lines to the Servitec have been cleaned and are clear of any debris that
may have accumulated during installation.
Parameter Settings
The Lowara Servitec has two parameter setting levels, one is for service use and is password protected, and the
second is for customer use and is not protected.
During initial start up the customer parameters must be set to the system specific conditions.
4
Specific system set points
The display shows the ’servitec’ type
selected; ’servitec magcontrol’ or ’servitec
levelcontrol’. The system type can be
specified here Select levelcontrol
System fill pressure
5
Select continuous gassing time
And confirm with OK button
Select the degassing program
Confirm with OK button
Select the degassing program
Confirm with OK button
6
Configure the setting here for whether a water
meter is to be evaluated, e.g. when using
Lowara ‘fillset’ with contact meter.
0 Only alarm = Factory settings
1 Alarm messages
7
The last 20 errors including error code (e.g.
ER01, page 11) are shown here as well as the
relevant operating hours until the message
occurs. E01 is the most recent error, E20 is
the oldest.
8
General description
’Servitec 30’ is a degassing and make-up station. It can be
used in a wide range of system conditions. The main field
of application is heating and cooling circuits and wherever
air problems in the form of dissolved or free gases cause
problems in systems.
The ’servitec’ vacuum spray-tube degassing system re-
moves up to 90 % of the dissolved gases from the system
water.
Vacuum degassing of a part flow of the circuit water takes
place according to an optimized schedule using selectable
degassing programs.
A part flow of the circuit water is sprayed through the
nozzle (7). The vacuum is created by the pump (6).
The large surface area of the sprayed water and the
intense vacuum result in the extremely high degassing
performance. The degassed water is returned to the
system. There the water is again able to dissolve gases.
The gases separated in the pump (6) are expelled using
the dipstick-tube degassing unit (5). This degassing
interval is repeated and free as well as dissolved gases
are removed from the circuit water.
Degassing interval
The degassing interval is a time-controlled, pre-pro-
grammed process that consists of the degassing time,
expulsion time, and idle time. The time periods can only
be changed in the service menu by Reflex Service.
The degassing intervals are repeated according to the
continuous degassing mode (standard = 5 h a day) or
interval degassing mode (standard = 16 x a day).
Injection time
The pump (6) starts. A vacuum (dependent on temperature) can be read off the displaY after a short time. This is
possible because the pump (6) draws more water from the pump casing than is able to flow in via the pressure supply
port with nozzle (7). Spraying via the nozzle commences as soon as the vacuum begins to be established.
The water level in the pump casing (6) drops continuously while the pump (6) is running. The timing program and pres-
sure setting have been selected so that the pump does not become low in water.
Expulsion time
The pump (6) switches off. The water continues to be sprayed into the pump casing by the system pressure (at least 0.5
bar). The water column in the pump casing rises gradually during the expulsion time.
The vacuum is still maintained during this phase of the interval. At the end of the expulsion phase, the rising water
column compresses the removed gas within a few seconds, expelling it into the atmosphere via the dipstick-tube
degassing unit (5)
Idle time
This is followed by the idle time during which redegassing takes place.
Make-up
In the case of the ’servitec 30’, the pressure in the heating or cooling system is registered and monitored with the help of
the pressure transducer (8). If the fill pressure drops below pF = p0 + 0.2 bar, make-up degassing is activated until
pF = p0 + 0.3 bar has been reached. Time (20 min default setting), cycle (3 in 2 hours) and volume monitoring are active
during this process.
The motorized ball valve (2) opens during make-up. During pump operation, a pressure of approx. - 0.6 bar is set in the
pump casing (pressure indicator display). In the event of a cyclical pump stop, the system pressure is checked and made
up if necessary.
2
5
6
8
7
Mode of Operation
9
Automatic Mode
Automatic Mode
successfully completed. If you are in automatic mode, you can select
from three degassing programs, if required. System monitoring is active
with all three programs. Make-up takes place automatically. Selection in
customer menu.
Continuous degassing – Intensive degassing following start-up and
repairs.
The degassing cycles are executed successively for the set
continuous degassing time (basic setting: 5 h). The controller then
automatically proceeds with interval degassing. In the case of water
systems, at least half the system volume should flow through the
’servitec’ unit once during start-up. Based on a system volume of
8 m3, this is equivalent to approx. 22 h of continuous degassing. In
systems that are particularly rich in gas, a continuous degassing
period of 48 h is completely sufficient. As a result of the subsequent
interval degassing, 10,000 intervals are made per year. This number
per year must not be exceeded in order to avoid unnecessary wear to
the ’servitec’. The controller registers the total number of intervals that
have passed.
Interval degassing – Economy mode in automatic mode
After 8 intervals (standard), a break (standard 23 h) is observed
before the next 8 degassing intervals are started. This program is
automatically started upon completion of continuous degassing or can
be selected manually for systems already degassed. Interval
degassing then starts at 08:00 each day.
No degassing – Only make-up
The system water is not degassed. This operating mode is practical
during summer operation or if general degassing of the system water
is not required.
Manual mode may only be be used after the initial start-up has been
completed. This operating mode is primarily a means of performing
functional checks of the pump and the make-up solenoid valve.
Select the pump or motorized ball valve,
activate the flashing symbol with the “ok”
button.
Pump starts/motorized ball valve opens.
Pressing the “ok” button again stops the
pump or closes the motorized ball valve.
Alternatively, the “quit” button can also be
pressed directly. The pump and motor-
ized ball valve then switch off after each
other.
Stop Mode
In stop mode, ’servitec 30’ is without function except for indication in the
LCD display. Operation monitoring does not take place. The pump is shut
off. The adjacent display appears when the “stop” button is pressed.
10
Messages are indicated on the display by the “info” symbol. At the same time, “Er” and the relevanterror code (e.g. Er 06) are shown on the info display. If there are several messages present, these maybe displayed using the symbols.
Most of the messages are automatically acknowledged once the cause has been remedied (seetable). Errors such as “Make-up time 06” or “Make-up cycle 07” must be acknowledged manually.For remote transmission, it is possible to use the floating changeover switch for the common message.In the customer menu, you can select whether only those messages characterized as alarms or allmessages should be output using the floating contact.
Messages
9
9
11
It is often of great use to know the sequence for assessing
a message or understanding the cause. The information in
the error memory can aid this (→ a. customer menu).
Scroll to the error memory display
This displays the last 20 errors with information from the
error code (e.g. ER01) as well as the corresponding
operating hour to the time that the message occurred.
Error sequence E01 is the mostrecent error; E20 is
the oldest error.
If the error memory is called up the most recent error (01) is
shown
To scroll through the error memory use:
To quite the error memory use:
Maintenance instructions
Disassembly
Maintenance work should only be carried out by specialists. As a reminder of the annual maintenance, the message“SrV” is shown in the display after a year of operation. This can be acknowledged with the “quit” button.
Leak test
– Check for external leaks
– Seal, if required
Clean dirt trap
– Clean the “blue ball valve” of the dirt trap (3)
Perform vacuum test
– p. 5
Function test of pump, motorized ball valve
– p. 9
Prior to disassembly of the ’servitec 30’ system or pressurized
parts, these must be depressurized on the fresh water and system sides.
1. On-site valves must be shut off to ’servitec 30’
2. Run the controller in “manual mode” page 9 and open motorized
ball valve (2) until pressure equalization with the atmosphere is achieved.
Lowara UK LimitedMillwey Rise Industrial Estate Axminster, Devon EX13 5HU - UK Tel: 01297 630230
