ProMinent ProMaqua CHLORINSITU V User manual

Chlorine Electrolysis System
CHLORINSITU® V
Operating instructions
P_PMA_ECA_0016_SW
EN
Original Operating Instructions (2006/42/EC)983754 BA CI 011 04/16 EN
Please carefully read these operating instructions before use. · Do not discard.
The operator shall be liable for any damage caused by installation or operating errors.
The latest version of the operating instructions are available on our homepage.

In order to make it easier to read, this document uses the male
form in grammatical structures but with an implied neutral sense. It
is aimed equally at both men and women. We kindly ask female
readers for their understanding in this simplification of the text.
Please read the supplementary information in its entirety.
Information
This provides important information relating to the cor‐
rect operation of the unit or is intended to make your
work easier.
Warning information
Warning information includes detailed descriptions of the haz‐
ardous situation, see
Ä Chapter 1.2 ‘Labelling of Warning Informa‐
tion’ on page 7 .
The following symbols are used to highlight instructions, links, lists,
results and other elements in this document:
More symbols
Symbol Description
Action, step by step.
⇨Outcome of an action.
Links to elements or sections of these instructions or other applicable documents.
nList without set order.
[Button] Display element (e.g. indicators).
Operating element (e.g. button, switch).
‘Display /GUI’ Screen elements (e.g. buttons, assignment of function keys).
CODE Presentation of software elements and/or texts.
General non-discriminatory approach
Supplementary information
Supplemental instructions
2

Table of contents
1 Description of the System..................................................... 5
1.1 Description and Operation............................................ 5
1.2 Labelling of Warning Information.................................. 7
1.3 Users' qualifications...................................................... 9
2 Safety and Responsibility ................................................... 10
2.1 General Safety Information......................................... 10
2.2 Intended Use.............................................................. 11
3 Components of the System................................................. 13
4 Storage and Transport........................................................ 15
5 Preparation for Use............................................................. 16
6 Installation and Assembly................................................... 17
6.1 Assembly check-list.................................................... 17
6.2 Assembly and Installation of the System.................... 18
7 Operation............................................................................ 31
7.1 Touch Screen............................................................. 31
7.2 CHLORINSITU®-V menu overview............................. 33
7.3 Operating Principles................................................... 33
7.4 Production parameters............................................... 34
8 Commissioning................................................................... 36
8.1 Check-list: Preparation for Commissioning................. 36
8.2 Check-list: Commissioning......................................... 40
8.3 Commissioning Work.................................................. 41
9 [ALARM] / Troubleshooting Menu ...................................... 50
9.1 Vacuum system.......................................................... 50
9.2 Booster pump............................................................. 51
9.3 Power supply.............................................................. 51
9.4 Lye storage tank......................................................... 51
9.5 Diaphragm cell............................................................ 53
9.6 Other faults................................................................. 54
9.7 Messages................................................................... 54
10 Maintenance Checks and Preparation for Maintenance..... 55
10.1 Care of the Operating Unit........................................ 55
10.2 Maintenance............................................................. 55
10.2.1 Introduction............................................................ 55
10.2.2 Maintenance kits.................................................... 57
10.2.3 Note the production parameters............................ 58
10.2.4 Checking the Brine Storage Tank.......................... 58
10.2.5 Cooling the Control Cabinet .................................. 58
10.2.6 Inspection of the refreshing................................... 58
10.2.7 Check the amperage at the diaphragm cells......... 59
10.2.8 Monitoring the Amperage at the Membrane Cells 59
10.2.9 Regeneration of the Water Hardness Meter ......... 60
10.2.10 Stop production.................................................... 61
10.3 Maintenance on the Water Softener ........................ 62
10.3.1 Maintenance on the Simplex Water Softener........ 62
10.3.2 Maintenance on the Duplex Water Softener.......... 66
10.3.3 Replacing the water filter....................................... 69
10.4 Maintenance on the Brine Storage Tank.................. 69
Table of contents
3

10.4.1 Checking the Float on the Level Switch................. 70
10.4.2 Cleaning the Suction Unit in the Brine Storage
Tank....................................................................... 71
10.5 Maintenance on the Lye Storage Tank..................... 72
10.5.1 Emptying the lye storage tank............................... 72
10.5.2 Replacing the O-rings on the Taps on the Bottom
of the Lye Storage Tank........................................ 73
10.5.3 Replacing the O-rings on the Couplings on the
Bottom of the Lye Storage Tank............................ 74
10.5.4 Replacing the O-rings on the Lye Storage Tank.... 74
10.5.5 Checking the Temperature Sensor on the Lye
Storage Tank......................................................... 74
10.5.6 Replacing the Level Switch in the Lye Storage
Tank....................................................................... 75
10.5.7 Maintenance on the Fan........................................ 75
10.6 Maintenance on the Diaphragm Cell ....................... 76
10.6.1 Replacing the O-rings on the Cathode Side of the
Diaphragm Cell...................................................... 77
10.6.2 Replacing the O-rings on the Anode Side of the
Diaphragm Cell...................................................... 78
10.6.3 Replacing the O-rings on the Brine Valve.............. 78
10.6.4 Replace the O-rings on the brine valve................. 79
10.6.5 Replacing the O-rings on the Bleed Pipe............... 79
10.7 Maintenance on the Anode Pipe............................... 79
10.7.1 The PVDF Float and Stop Pipe............................. 80
10.7.2 Replacing the O-rings on the Anode Pipe............. 81
10.7.3 Replacing the Bleed Valve..................................... 82
10.8 Maintenance on the Process Water System............. 82
10.8.1 Cleaning the Booster Pump Filter Insert................ 82
10.8.2 Replacing the Seals on the Water Jet Pump......... 83
10.8.3 Cleaning the Water Jet Pump Nozzle.................... 84
10.8.4 Replacing the Refresh Valve................................. 85
10.8.5 Replacing the O-rings on the Refresh Tap............ 85
10.8.6 Replacing the Lye Valve........................................ 86
10.8.7 Replacing the Seals on the Water Jet Pump......... 87
10.8.8 Cleaning the Water Jet Pump Nozzle.................... 88
10.8.9 Replacing the Flow Meter for Lye Suction............. 89
10.8.10 Replacing the O-rings on the Control Tap for Lye
Suction................................................................. 89
10.8.11 Maintenance on the Lye Pump............................ 90
10.9 Maintenance on the Control Cabinet........................ 91
10.9.1 Checking the Relay Contacts................................ 91
10.9.2 Cleaning the Filters ............................................... 92
10.10 Commissioning the System after Maintenance...... 92
10.10.1 Commissioning Process...................................... 92
10.11 Maintenance on the Chlorine Gas Detector............ 93
11 Maintenance kits................................................................. 94
12 Disposal of Used Parts....................................................... 95
13 Technical data for CHLORINSITU®-V................................. 96
14 EC Declaration of Conformity for Machinery....................... 98
15 Index................................................................................... 99
Table of contents
4

1 Description of the System
The system is used for water disinfection for applications such as:
nSwimming pool water
nPotable water
nWaste water
nF&B
n...
The system is used to produce a chlorine-based disinfectant.
The system is used to electrochemically produce ‘free chlorine’
from substances naturally present in water.
The quantity of ‘free chlorine’ is determined, among other things,
by the concentration of the chloride ions, but also by the current
strength.
The system has the following features:
nThe product is generated in-situ where it is needed
nThere is no need to transport concentrated chemicals
1.1 Description and Operation
Water softener
Install a softener upstream of the system, which,
among other things, will prevent pH-based deposits of
calcium and the temperature rising. Calcium and mag‐
nesium cause serious deposits on the diaphragm cell.
The system produces free chlorine from a salt solution, as per the
diagram below. The system produces chlorine by means of an
electrochemical process in a diaphragm cell.
Description of the System
5

P_PMA_ECA_0017_SW
H
J
Fig. 1: Flow chart for Chlorinsitu®-V
No. Part Function
1 Water filter to combat impurities > 500 µm
2 Water softener softens the supply water
3 Water hardness meter (option) measures and controls the water hardness
4 Brine storage tank salt and water produce brine
5 Diaphragm cell to produce chlorine and NaOH
6 Refresh pipe helps to regenerate the anode
7 Vacuum sensor measures the negative pressure
8 Lye storage tank stores the lye
9 Lye storage tank cooler cools the lye storage tank
10 Fan mixes hydrogen gas with air until the mixture is no longer
explosive
11 Chlorine gas water jet pump dissolves the chlorine gas from the refresh pipe in the
process water
12 Booster pump keeps the flow of process water through the electrolysis
system stable
13 Chlorine gas sensor (option) detects any chlorine gas leakage that may develop
14 Lye metering pump Pump to correct the pH value
15 Anode regeneration water jet
pump
draws up brine and anode residue by suction
16 Brine flow meter for diaphragm
cell
measures the volume of brine for the diaphragm cell
Description of the System
6

No. Part Function
17 Lye metering flow meter measures the flow of lye, by means of which the process
water can be adjusted to be pH-neutral via the metering
tap
18 Flow meter for filling the lye tank measures the water flow to the lye tank
If calcium and/or magnesium are present in the brine, then these
elements precipitate as lime on the negative probe (cathode) and
the diaphragm in the diaphragm cell will be irreparably damaged.
Therefore install a softener upstream of the system. Use salt with
as low a calcium and magnesium content as possible in this soft‐
ener. We recommend using Marina® or Broxo-6-15® salt, which is
specifically supplied for water softeners.
Ensure that the salt also meets the chemical specification below:
nInsoluble substances < 100 ppm
nCalcium (Ca+) < 70 ppm
nMagnesium (Mg+) < 70 ppm
Water quality: The system is suitable for connecting to the potable
water network. The water should be of potable water quality or
comparable.
The sound pressure level is < 70 dB (A) at maximum speed, at
maximum back pressure, using water as the medium.
Degree of protection for the system: IP 55.
1.2 Labelling of Warning Information
These operating instructions provide information on the technical
data and functions of the product. These operating instructions pro‐
vide detailed warning information and are provided as clear step-
by-step instructions.
The warning information and notes are categorised according to
the following scheme. A number of different symbols are used to
denote different situations. The symbols shown here serve only as
examples.
DANGER!
Nature and source of the danger
Consequence: Fatal or very serious injuries.
Measure to be taken to avoid this danger.
Description of hazard
– Denotes an immediate threatening danger. If the
situation is disregarded, it will result in fatal or very
serious injuries.
Basic substances required
Sound pressure level
Protection against contact and
humidity (IP)
Introduction
Description of the System
7

WARNING!
Nature and source of the danger
Possible consequence: Fatal or very serious injuries.
Measure to be taken to avoid this danger.
– Denotes a possibly hazardous situation. If the sit‐
uation is disregarded, it could result in fatal or very
serious injuries.
CAUTION!
Nature and source of the danger
Possible consequence: Slight or minor injuries. Mate‐
rial damage.
Measure to be taken to avoid this danger.
– Denotes a possibly hazardous situation. If the sit‐
uation is disregarded, it could result in slight or
minor injuries. May also be used as a warning
about material damage.
NOTICE!
Nature and source of the danger
Damage to the product or its surroundings.
Measure to be taken to avoid this danger.
– Denotes a possibly damaging situation. If the situa‐
tion is disregarded, the product or an object in its
vicinity could be damaged.
Type of information
Hints on use and additional information.
Source of the information. Additional measures.
– Denotes hints on use and other useful information.
It does not indicate a hazardous or damaging sit‐
uation.
Description of the System
8

1.3 Users' qualifications
WARNING!
Danger of injury with inadequately qualified personnel!
The operator of the plant / device is responsible for
ensuring that the qualifications are fulfilled.
If inadequately qualified personnel work on the unit or
loiter in the hazard zone of the unit, this could result in
dangers that could cause serious injuries and material
damage.
– All work on the unit should therefore only be con‐
ducted by qualified personnel.
– Unqualified personnel should be kept away from
the hazard zone
Training Definition
Instructed personnel An instructed person is deemed to be a person who has been instructed and,
if required, trained in the tasks assigned to him/her and possible dangers that
could result from improper behaviour, as well as having been instructed in the
required protective equipment and protective measures.
Trained user A trained user is a person who fulfils the requirements made of an instructed
person and who has also received additional training specific to the system
from ProMinent or another authorised distribution partner.
Trained qualified per‐
sonnel
A qualified employee is deemed to be a person who is able to assess the
tasks assigned to him and recognize possible hazards based on his/her
training, knowledge and experience, as well as knowledge of pertinent regula‐
tions. The assessment of a person's technical training can also be based on
several years of work in the relevant field.
Electrician Electricians are deemed to be people, who are able to complete work on elec‐
trical systems and recognize and avoid possible hazards independently based
on his/her technical training and experience, as well as knowledge of pertinent
standards and regulations.
Electricians should be specifically trained for the working environment in
which the are employed and know the relevant standards and regulations.
Electricians must comply with the provisions of the applicable statutory direc‐
tives on accident prevention.
Customer Service depart‐
ment
Customer Service department refers to service technicians, who have
received proven training and have been authorised by ProMinent to work on
the system.
Note for the system operator
The pertinent accident prevention regulations, as well
as all other generally acknowledged safety regulations,
must be adhered to!
Description of the System
9

2 Safety and Responsibility
2.1 General Safety Information
WARNING!
Danger due to hazardous substances
By operating this system the operator generates haz‐
ardous substances.
The operator is responsible for adapting the operating
instructions to their system in the event that more
recent knowledge about the dangers associated with a
hazardous substance and its avoidance become avail‐
able or national regulations prescribe something else
to that stated in the supplied operating instructions.
WARNING!
Safely discharge any waste hydrogen produced
Always discharge any hydrogen produced during the
electrolysis process outside into the atmosphere via a
closed, continuously rising pipework system.
Check the continuity of the hydrogen discharge line
annually.
WARNING!
Danger from hazardous substances!
Possible consequence: Fatal or very serious injuries.
The system operator is responsible for ensuring that
the safety data sheets are available and that they are
kept up to date, as well as for producing an associated
hazard assessment for the workstations affected.
The sound pressure level is < 70 dB (A) at maximum power
(without the booster pump)
Explosion safety
The system generates a small volume of hydrogen-air
mixture. It is essential that this hydrogen-air mixture is
safely discharged into the surrounding air outdoors.
Check during installation that no air is drawn in close
to the outlet, for instance by an air conditioning
system.
If hydrogen is released due to a damaged pipeline or
due to another cause, it can form an explosive gas
mixture (hydrogen-air mixture) with the ambient air.
Ensure that the room has a minimum ventilation rate of
5 m3/hour. Ensure that the ventilation system is opera‐
tional when the system is running.
Sound pressure level
Safety and Responsibility
10

Open flame
No open flames are permitted when the system is in
operation.
Industrial security concept for the entire system
For the safe operation of a system or machine, it is
also necessary to take appropriate safety measures
(e.g. cell protection concept) and to integrate the auto‐
mation and drive components in an overall industrial
safety scheme for the entire system or machine, which
corresponds to the current state of the art. In doing so,
take into account any other manufacturers' products
used.
Organisational requirements:
nAccording to ATEX 137, it is the responsibility of the operator
to draw up an explosion safety document.
nThe operator should include the system in his Emergency Plan
and state the outline safety plans.
nThe Emergency Plan should not run any escape routes past
the system.
nThe operator should appoint a Safety Coordinator. This person
is responsible for monitoring work that affects the system's
explosion safety.
The operator should provide personal protective equipment in line
with the hazards and in compliance with national regulations.
The operator should supplement the emergency information in line
with the hazards and in compliance with national regulations.
nIn the event of smelling chlorine gas:
– immediately switch off the electrolysis system
– or press an Emergency Stop switch
– or disconnect the mains power supply
– or trigger an external fuse
– and inform Service.
nIf an electrical emergency occurs, immediately disconnect the
electrolysis system from the mains power supply and then
inform Service.
2.2 Intended Use
nThe system is only intended for the production and metering of
a disinfection solution containing chlorine from sodium chloride.
This disinfection solution is used to disinfect water.
nAll other uses or modifications are prohibited.
nDo not operate the system in conditions other than those
described in these operating instructions.
nOnly allow qualified personnel to operate the system.
Personal protective equipment
Information in the event of an emer‐
gency
Safety and Responsibility
11

nPlease observe the information in the operating instructions at
every phase of the system's service life
nPlease observe the relevant national regulations and guide‐
lines at every phase of the system's service life
Safety and Responsibility
12

3 Components of the System
A
B
C
D
E
F
G
P_PMA_ECA_0018_SW
Fig. 2: Components of the System in the System Cabinet
P_PMA_ECA_0019_SW
Fig. 3: Installation of the system
Number Part Function
A Water softener Softens the water. Removes calcium and magnesium.
B Flow meter The process water to the lye storage tank is switched on and
measured after measuring the flow volume.
C Lye storage tank Stores the sodium hydroxide solution produced.
D Fan Dilution of the hydrogen gas up to 10% of the explosion limit.
Components of the System
13

Number Part Function
E Refresh pipe Helps to regenerate the anode.
F Diaphragm cell Chlorine is produced from a salt solution in an electrochemical
process in the diaphragm cell.
G Booster pump Keeps the flow of process water through the electrolysis system
stable
Components of the System
14

4 Storage and Transport
WARNING!
Storage of the system in unsuitable ambient condi‐
tions.
– It is mandatory that the following storage instruc‐
tions are adhered to.
Unsuitable ambient conditions can lead to incorrect
operation and malfunction of the system installed and,
when the system is in operation, also lead to danger to
personnel.
Store the system in its original transport packaging in a sealed
room and also
nAt a temperature of between 5 °C ... 50 °C
nAt a relative air humidity of below 85 % without condensation
nIn a non-aggressive environment (no harmful vapours, chemi‐
cals etc.),
nProtected from direct sunlight, rain and moisture
nStore the system upright.
WARNING!
Incorrect transport
Incorrect transport of the system by non-seaworthy
packaging or horizontal packaging.
– It is mandatory that the following instructions are
adhered to.
Incorrect transportation can result in damage to per‐
sonnel and material damage.
nOnly connect appropriate lifting equipment to the lifting eyes on
the top of the system.
nCarefully transport the system vertically (see label on the trans‐
portation packaging).
nAvoid mechanical impacts
nProtect the system from direct sunlight, rain and moisture
during transportation.
CAUTION!
Toppling of the system cabinet
– Once the system has been unpacked, secure the
system with lashing straps to prevent it from top‐
pling over.
If the system topples over it can cause injuries to per‐
sonnel and material damage.
Storage
Transport
Storage and Transport
15

5 Preparation for Use
WARNING!
Danger from operation of the system in unsuitable
locations.
– Adhere to all national and local regulations relating
to the use of chlorine.
– The operator of the system is responsible for
ensuring that the regulations are implemented.
Disregarding the safety requirements can lead to per‐
sonal injuries or damage to property.
nEnsure that the floor of the room has sufficient load-bearing
strength to carry the weight of the filled system.
nEnsure that the room has an adequately dimensioned floor
drain to safely drain any escaping water in the event of a pipe
leak.
nDo not locate permanent work places in rooms in which the
system is situated.
nEnsure that the room is free of aggressive vapours and chemi‐
cals.
nEnsure that the room contains minimal dust.
nEnsure that the room temperature and air humidity do not
exceed the permissible limits. Install an air conditioning system
in the room if this cannot be guaranteed.
nProtect the system from direct sunlight.
nEnsure that there is adequate mechanical ventilation in the
room to prevent harmful substances accumulating in the
ambient air.
nAllow a minimum gap of ⋝ 30 cm for the cooling fan and for
maintenance to the left and right of the control cabinet.
nEnsure that the room has suitable and adequate mains voltage
connections for operation of the relevant system.
nEnsure that the room has an adequate supply of cooling water,
if cooling water is needed.
nEnsure that the floor is even and horizontal and has a solid
base surface.
nPrevent the system from toppling over by, for example, fixing
the control cabinet to the wall or floor. Secure it in another way
should the latter not be possible.
nCheck the requirements relating to accessories, operated
together with the system in the same room, such as air separa‐
tion systems. Refer to the literature for the accessories.
nEnsure that the rear wall of the system is at least ⋝ 15 cm from
the wall.
Preparation for Use
16

6 Installation and Assembly
6.1 Assembly check-list
# Assembly process Tick
1 Check whether the installation location complies with the guidelines governing tempera‐
ture, safety, space, humidity etc.
2 Clear the space in which the system is to be installed.
3 Remove the plastic wrapping from the system.
4 Check whether the system has suffered damage during transport or displays other
damage.
5 Remove the securing material fixing the system to the pallet.
6 Lift the system into its installation position.
7 Ensure that the system is horizontal. Use the supplied support blocks if necessary.
8 Remove the lifting gear from the system.
9 Position the brine storage tank in its intended position.
10 Connect the supplied pipe (Ø75/Ø110) to the sensor-air flow at the ventilator outlet.
11 Connect the pipework system to the supplied pipe (Ø75/Ø110) and route the discharge
pipe outside.
12 Make sure that the discharge pipe (Ø63 mm) routed outside is connected in accordance
with ATEX regulations.
13 Connect the Ø20 mm PVCU pipe to the ventilation valve.
14 Connect the supplied PVCU waste water pipe (Ø40/Ø50 mm) and the elbow to the
system.
15 Connect the PVCU discharge pipe (Ø40/Ø50 mm) of the system to the sewerage
channel.
16 Connect a water line to the "Water feed" Ø 20 mm PVCU coupling on the system.
17 Connect the Ø20 mm PVCU pipe from the "waste water" coupling of the system to the
sewerage channel.
18 Connect the PVCU pipe (Ø25/Ø32) for the circulation piping to the suction side of the
booster pump.
19 Connect the PVCU line (Ø20/Ø25) between the "metering line" connector for the system
and the metering point.
20 Use the Ø16 mm x 1.8 mm PE hose to join the "Fill brine storage tank" connector on the
system to the Ø16 mm connector on the brine storage tank.
21 Use the Ø16 mm x 1.8 mm PE hose to join the "Brine diaphragm cell" connector on the
system to the Ø16 mm connector on the brine storage tank.
22 Use the transparent nylon hose (Ø16 mm x 8 mm) to connect the "Brine water softener"
connector on the system to the ⌀10 mm connector on the brine storage tank.
23 Connect a PVCU pipe (Ø40 mm) to the brine storage tank overflow. There should be
salt in the brine storage tank once the PVCU lines have been connected.
24 Connect the brine storage tank level switch.
25 Connect the metering enable terminal in the control cabinet.
Installation and Assembly
17

# Assembly process Tick
26 Connect the chlorine (Cl2) and pH controller in the control cabinet.
27 Connect the main power supply (with the necessary power and amperage) to the ter‐
minal strip in the control cabinet in accordance with the voltage and current specification.
THIS PART WAS ACCEPTED BY: NAME: SIGNATURE:
Project number:
System:
6.2 Assembly and Installation of the System
nUser qualifications, mechanical/hydraulic installation: trained
skilled personnel, see Ä Chapter 1.3 ‘Users' qualifications’
on page 9
nUser qualification, electrical installation: Electrical technician,
see Ä Chapter 1.3 ‘Users' qualifications’ on page 9
Installation and Assembly
18

1. Check whether the installation location complies with the
guidelines governing temperature, safety, space, humidity
etc.
Specification of the installation location
Ensure that the installation location ideally com‐
plies with the following conditions:
– A dry area, which does not necessarily have
to be a separate room.
– An area that can be locked/cordoned off so
that only authorised personnel have access.
– An ambient temperature of at least +10°C;
otherwise heating is required.
– An ambient temperature of at most +35°C;
otherwise air conditioning is required.
– It should be possible to fit a sewerage drain,
a bleed valve and bleed openings.
An installation drawing showing the correct
dimensions can also be produced to ensure cor‐
rect installation. The installation area and posi‐
tion are determined using the drawings provided.
CAUTION!
Contamination and impurities in the lines can
subsequently seriously damage components in
the system.
– Ensure that all lines are free from burrs,
chips or other impurities before connecting
them to the system.
CAUTION!
The level switches can subsequently fail.
– Make sure that no dirt remains in the storage
tanks after installation.
2. Clear the space in which the system is to be installed
Check that there are no obstacles around the
system.
Provide a clearance of around 1 metre in front of
and beside the system for maintenance pur‐
poses.
Always leave room for a waste water connection,
discharge conduits and ventilation system. The
waste water connection is located underneath
the system.
3. Remove the plastic wrapping from the system.
4. Check whether the system has suffered damage during
transport or displays other damage.
Check that the scope of delivery is complete.
Installation and Assembly
19

P_PMA_ECA_0018_SW
5. Remove the securing material fixing the system to the pallet.
In the system cabinet, remove:
nthe tensioning straps on the lye tank
nthe securing material between the diaphragm cell and
frame
nthe plastic around the couplings
6. Lift the system into its installation position.
The system has load hooks, by means of which
the system can be lifted and moved to the cor‐
rect position.
You can also use a fork-lift to position the
system, taking into account the fact that there is
a PVC connector on the underside of the system
that can be damaged.
Installation and Assembly
20