BWT Liff Powermag PM100S User manual

Installation & Operating
Instruction Manual

2
Contents
1. General Notes .......................................................................3
2. Installation .............................................................................4
3. Electrical Notes......................................................................7
4. Troubleshooting Guide..........................................................9
5. Spare Parts List.....................................................................9
6. Specifications ......................................................................10
7. Warranty Information...........................................................11

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1. General Notes
Powermag is a WRAS approved electromagnetic physical water
conditioner that utilises a powerful electromagnetic field to inhibit hard
crystalline scale formation in hot and cold water systems. The Powermag
induces a specific magnetic field within the water path that has a physical
effect on the hardness minerals within the water supply. This helps to
inhibit new formations and remove existing formations of scale, providing
an environmentally friendly method of scale treatment without the use of
chemicals.
The Powermag physical water conditioner alters the structure of scale
forming particles encouraging them to pass through the pipe system
without leaving deposits of hard scale within the system. The Powermag
physical water conditioner does not introduce sodium, or any other
chemicals, into the water and therefore the water remains potable.
Physically conditioned water will tend to revert back to its untreated state
over time; we recommend the sooner that the water is used after
treatment, the more effective the physical water conditioner will be. In
addition consideration should be given where water turbulence may be
induced in the water flow as this may reduce the effectiveness of the
physical water conditioner. Please refer to the installation section of this
manual for guidance on the optimum position for treatment of the water
supply.
The Powermag does not require a separate drain. It can be installed
directly in-line without the need for water bypass. There are no moving
parts so the device requires minimal servicing.

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2. Installation
Powermag must be installed by a professional installer
The device should be installed directly in-line on pipework in any of the
following materials; stainless steel, galvanized steel, copper or plastic.
To ensure that the device is adequately supported and does not place
excessive strain on the existing pipework, we recommend using
additional support brackets (not supplied) on the inlet and outlet
pipework. The device can be installed in either vertical or horizontal
orientation to suit your existing pipework and while it may be necessary
to install additional pipework, elbows and fittings in order to adequately
locate the device we recommend keeping this to a minimum.
The device is manufactured from stainless steel tubing and as such is
resistant to corrosion.
We recommend the use of isolation valves before and after the device to
facilitate any service or maintenance work that may be required.
The Powermag control panel should be connected to a suitable 13A
fused switched spur. Please refer to the product specification data to
ensure you have a suitable spur available.
The spur must incorporate an accessible isolation switch to enable
maintenance or repair of the device.
Under no circumstances should the Powermag coil assembly be
connected directly to any mains power supply. Always connect the coil
assembly to the control panel supplied with the device.

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Recommended Installations
Powermag units are best installed in one of the following positions:
Gravity feed from a central water tank
After a booster pump
Directly on the cold mains supply, where all outlets are mains fed
Isolation
Valve
Isolation
Valve
Isolation
Valve
Pump
Powermag
Pipe Supports
Water
Tank
Isolation
Valve
Isolation
Valve
Isolation
Valve
Isolation
Valve
Isolation
Valve
Water
Tank
Powermag
Pipe Supports

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Key to LCD Display
Running Temperature: Temperature
reading from the thermistor on the
outlet pipework
Coil Current: Operating current of
electromagnet
Hours Run: Total hours of coil
operation since installation
Set Temperature: Maximum
temperature setting for thermistor
circuit
Coil Status: Current status of the coil
- Coil Active when operational
- Coil Inactive when thermistor set
temperature is achieved
Activity LED Display: Visual display of
coil activity
- LED will run left to right when active
- LED will halt when inactive
- LED will illuminate fully when a fault
is present
Isolation
Valve
Isolation
Valve
LED
Display
Activity
LED
Display
Isolation
Switch
Powermag
230V 50Hz Supply
Thermistor
Attach to the pipe surface downstream of
the device using cable tie or similar
Use for cold water only
Thermistor is a safety and efficiency device
for cold water systems and will render the
coil inactive when water stops flowing by
detecting an increase in the standing water
temperature in the pipework
Powermag coil flying lead length
supplied: 4.5m (approx.)
Thermistor lead length supplied:
2.5m (approx.)

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3. Electrical Notes
Identifying the main components
Control
PCB
Display
Power Supply PCB
Assembly
inc. smoothing capacitor and bridge
rectifier
MCB
Coil DC
Supply
MCB
Mains AC
Supply
Power
Transformer
Connection
Terminal
Block

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E
Connection Terminals
Connect terminals marked L (Live), N (Neutral) and E (Earth) on
the right of the terminal box to the fused switched spur for the
mains power supply (using the flying lead supplied with the panel
or similar)
Connect flying lead from Powermag coil assembly to the terminals
marked:
+ (use brown cable)
- (use blue cable)
E (use green / yellow cable) –NOTE: a spare Earth terminal is available
on the left of the terminal block
Connect thermistor cable to 2 central terminals marked TEMP (or
Thermistor). The thermistor circuit is a loop so the terminals can be
connected either way round
Terminals 7,8 and 9 are for BMS and fault monitoring systems only
The diagram below shows the monitoring relay in the power OFF state. When power
is ON the terminals 7 and 8 will close circuit

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4. Troubleshooting Guide
The following fault table is provided as a guide to resolving operational
issues with the Powermag system. Any fault diagnosis must be
conducted by a suitably qualified electrical engineer.
Problem
Possible Cause
Recommended Solution
Coil remains inactive
Supply water flow has
stopped
Water temperature is above
the set point of the thermistor
Check water supply flow
Do not use thermistor for hot
water
Adjust thermistor to suit the
application using dial on rear
of Control PCB Display
Mains MCB tripping
Fault on transformer
Test and replace transformer
Coil DC supply MCB tripping
Fault on coil
Test and replace coil
Panel temperature high
Loose connections on power
circuit
Check and secure loose
connections
Fault monitoring contacts
remain closed
Loss of power to panel
Check power supply and
MCB status
5. Spare Parts List
Description
Part Number
Transformer 13.5V (PM100 only)
PMT13.5
Transformer 16V
PM16
Isolation Switch
PMMI30
6A MCB (Mains Supply MCB)
PMCB6
10A MCB (PM100 only)
PMCB10
16A MCB (Coil Supply MCB)
PMCB16
Control PCB Display
PMDISPLAY
Thermistor with lead
PMTHL
For spare parts please contact BWT on 01494 838100 or email [e-mail]

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6. Specifications
Mechanical Specification
Specification
/ Model
PM100S
PM150S
PM200S
PM250S
PM300S
PM400S
Pipe Size
(BSP male)
1”
1.5”
2”
2.5”
3”
4”
Coil diameter
(mm)
324
324
324
324
324
324
Coil width
(mm)
140
175
225
225
225
225
Overall length
(mm)
180
240
330
330
330
330
Coil weight
(kg)
9
20
20
23
24
27
Max flow rate
(l/sec)
1.5
3.0
6.0
8.0
12.0
30
Frictional loss
(bar)
<0.2
<0.2
<0.2
<0.2
<0.2
<0.2
Max water
temperature
(°C)
25
25
25
25
25
25
Max pressure
(bar)
16
16
16
16
16
16
Electrical Specification
NOTE: MCB ratings are maximum safety ratings. Actual current drawn in operation is
significantly lower
Specification
/ Model
PM100S
PM150S
PM200S
PM250S
PM300S
PM400S
Transformer
Voltage (V)
13.5
16
16
16
16
16
Mains MCB
(A)
2
6
6
6
6
6
Coil Supply
MCB (A)
10
16
16
16
16
16
AC Power
Supply
230V/50Hz
230V/50Hz
230V/50Hz
230V/50Hz
230V/50Hz
230V/50Hz
Power
Consumption
(kW)
0.2
0.2
0.2
0.2
0.2
0.2