Vapac VapaNet LFE Series User manual

These instructions contain operating information and should be left with the unit.
Ceiling Void horizontal Fan
Electrode Boiler Units
LFExx Range
Installation & Operation Manual
Edition 2.2.0
Installation in countries covered by EC Directives:
This product meets the requirements of the RoHS Directive 2002/95/EEC
This product will meet the requirements of the Low Voltage Safety Directive 2006/95/EEC and the
EMC Directive 2004/108/EEC when installed in accordance with the instructions contained in this
manual.
Failure to comply with these instructions may invalidate the manufacturer's warranty or any
certificate/declaration of conformance requested to be supplied with the unit.

2
CONTENTS
1.0 Installation ............................................................................................................................................4
1.1 Vapac LFE unit dimensions .................................................................................................................4
1.1.1 LFExx weights .....................................................................................................................................5
1.2 Vent duct connections ..........................................................................................................................5
1.2.1 General .................................................................................................................................................5
1.2.2 Ventilation duct connections ................................................................................................................5
1.2.3 Ventilation duty....................................................................................................................................5
1.3 Plumbing Considerations......................................................................................................................6
1.4 Electrical Connections..........................................................................................................................7
1.4.1 Important E.M.C. Considerations........................................................................................................7
1.4.2 Power Supply Connection ....................................................................................................................8
1.4.3 Electrical Connections..........................................................................................................................8
1.4.4 Cable Entry Provision...........................................................................................................................8
1.5 Cylinder Electrical demand loads.........................................................................................................8
1.5.1 LFE05 Units .........................................................................................................................................8
1.6 Control Circuit Connections.................................................................................................................9
1.6.1 Control Circuit Wiring .........................................................................................................................9
1.6.2 On/Off Control .....................................................................................................................................9
1.6.3 Proportional Control.............................................................................................................................9
1.6.4 Control Signal Selection.....................................................................................................................10
1.6.5 Security Circuit / E.P.O. Shutdown....................................................................................................10
1.6.6 Drain operation...................................................................................................................................11
2.0 Start-Up / Operation ...........................................................................................................................11
2.0 Start-Up / Operation ...........................................................................................................................12
2.0.1 Start-up check list ...............................................................................................................................12
2.0.2 Start-Up Instructions ..........................................................................................................................12
2.0.3 Commissioning/Start-Up....................................................................................................................12
2.0.4 Features of VAPANET Electrode Boiler Unit ...................................................................................12
2.1 Service Advice ...................................................................................................................................12
2.1.1 Procedure for Cylinder Exchange.......................................................................................................12
2.2 Service and Maintenance....................................................................................................................14
2.2.1 Feed Valve with Strainer ....................................................................................................................14
2.2.2 Drain Pump.........................................................................................................................................14
3.0 Location of Indicators and Controls ...................................................................................................15
3.1 Positioning of Indicators and Controls on Vapac ® Vapanet ® LEFC Units....................................15
3.2 Initial Set-up .......................................................................................................................................16
3.3 Normal Run / Standby / Start-up – No User Intervention Required ...................................................17
3.4 Fault / Service Indications – Requiring Operator Intervention...........................................................18
3.3 Facia Label symbols ...........................................................................................................................19
4.0 Trouble-shooting Check List ..............................................................................................................20
5.0 Wiring diagram...................................................................................................................................22

3
Important Installation Points
The unit must be installed to comply with national regulations and/or codes of practice. A qualified
electrician must carry this out.
Do not locate the cabinet where the ambient temperature around the unit could exceed 35º C; or
fall below 5º C e.g., an unventilated roof mounted enclosure – see minimum space / ventilation
requirements pages 4 & 5.
Make sure condensate line(s) have adequate slope (min 8%) for condensate drainage and use.
Provide adequate support to prevent sags developing in flexible steam lines, which can fill with
water and create a "trap".
Do not locate vented drain directly within the ventilated void area.
Important Electrical Connection Items
Before commissioning the unit, check that all electrical (power) connections - including those at
the terminals and contactor are tight.
Check that the transformer primary winding connection is correct for the supply voltage at Vapac
terminals A1 & A2.
The Vapac transformer must not be used to power other equipment.
To comply with EMC aspects see recommendations on page 8.
Use a high-limit humidistat to ensure positive interruption of unit operation when over-
humidification is detected.
It is important to note that the control signal input to terminal 5 is connected to ground at the
Vapac control PCB.
NB: Care should be taken if the controller output is also referenced to earth, as incorrect
connection will lead to damage to the controller and or the Vapac control PCB.
Important Maintenance Items
Only a competent person should carry out maintenance.
The boiler contains hot water, and must be drained before any maintenance is carried out on the
steam section. This should be done prior to isolating the power, and removing the access panel.
ESD SENSITIVE DEVICES USED ON PCB. ENSURE ANTI-STATIC PRECAUTIONS ARE TAKEN
WHEN REMOVING OR REPLACING PCB’S.

4
1.0 Installation
Do’s
Do The top of unit MUST be hang level in both direction as
the unit contains a drain tray which must have the
correct fall inside.
Do The unit must be hang so as a clear access can be
gained to the under side access doors of unit. If
possible between ceiling tile tee bar or support grid.
Do ensure adequate side ventilation (min 80 mm).
Do ensure adequate service access below the unit (min
1000 mm).
Do use the marking on the side of the carton as a template
to mark the mounting hole positions.
Do use three M8 stud drop rods or bolts each side of unit
(six fixing points) to support the unit level and flat.
Don’ts
Don’t mount the unit close to sources of strong electro-
magnetic emissions e.g. variable speed lift motor
drives, kVa transformers etc.
Don’t mount the unit in an unventilated enclosure.
Don’t mount in a position were access to the unit will not
be possible when all pipe work, vent ducts, and
electrical services are installed.
Don’t mount the unit over light fitting, Fire sensors or other
equipment connected onto the ceiling grid or ceiling
tiles which would prevent access to the under side.
Don’t mount the unit in an area which will be hosed down.
Don’t install the unit where the ambient temperature can
exceed 35°C; or fall below 5
°
C.
Don’t mount the unit inside a cold-room or other place
where temperature and humidity conditions can cause
condensation on electrical components.
Don’t mount the unit where the sound of a contactor
opening/closing and water flow in a pipe would be
unacceptable or anywhere where the specified unit
noise rating is not to be exceeded.
1.1 Vapac LFE unit dimensions
Top view: Showing center lines
for Mounting hole position on
top of unit for M8 fixing stud or
bolts to hang unit from ceiling
slab. Also unit casing overall
size is shown.
Middle elevations are:
Left view: showing End air
discharge position and
emergence drain try overflow
connection for visual overflow
alarm.
Middle view: showing side air
discharge and inlet position these
are on both sides of unit two drain
connections one for drain tray the
other cylinder drain and ¾”BSP
water inlet position.
Right view: Side View showing
End air inlet position and
electrical cable entry point..
Bottom View: Showing
Under side of unit ON/OFF
switch position and power ON
indication light
Each unit supplied with
2 x duct connection spigots
4 x blanking plates.

5
1.1.1 LFExx weights
The unit dry weight is the delivered unit with no
water in unit, the wet weight is the operational
weight when the unit is running.
1.2 Vent duct connections
1.2.1 General
The unit is designed to be mounted within a
ceiling void with either
The unit is designed to be mounted within a
ceiling void with either:
1 - a ducted inlet and discharge air for example
to ceiling grilles or,
2 - a Void inlet and ducted discharge for extract
ceilings void or,
3 - a Ducted inlet and void discharge for supply
air ceiling voids.
The duct connections onto the unit are designed
for 200 mm internal diameter flexible ducts. The
inlet and discharge for the unit can be on the
end, left side, or right side for both inlet and
discharge.
1.2.2 Ventilation duct connections
The unit is provided with two spigots one for
inlet the other for the discharge only one spigot
connection is required each end the other two
should be blanked off each end of unit, with
the four blanking plates provided with unit. The
spigot should be placed in one of three
positions as shown below the other two outlets
should be blanked off.
Duct work connections view from under side of
unit.
Discharge end Inlet end
Note only one spigot is required each end the
other two ports must be blanked off with
blanking plates provided.
The spigot dimensions are
The unit can have free air return inlet or free
air discharge into void area if required in this
case the spigot need not be connected. If free
air return from void area is required a filter
screen can be provide part number FVKIT 179
Then the inlet port must have the Velcro strip
tapped around the hole as shown and the filter
fixed onto the Velcro so air is filtered before
entering the unit, note the other two inlets must
be blanked off.
1.2.3 Ventilation duty.
The unit design airflow is:
FAN SPEED External pressure Air Volume
Pa m
3
/s
Lo speed 0. 0.1
Lo speed 36 0.09
Hi speed 0 0.16
Hi speed 50 0.12
Note: maximum external resistance at hi speed
is 50 Pa which equals 36Pa external at Lo
speed.
Vapanet model Dry Kg Wet Kg
LFE05 34 38
Velcro tap
stuck around
inlet opening

6
1.3 Plumbing Considerations
1.3.1 Cold water supply
General
The Vapanet range of electrode boilers is capable of
operating with a range of “raw mains” water quality. The
water supply should be within the following limits:-
Hardness 50 – 500 ppm
Conductivity 80 – 1000 µS*
PH 7.3 – 8.0
Silica 0
Pressure of between 1.5 - 8 bar.
Chlorine <170 ppm
Water Supply rates
0.25 l/min LFE05
Do’s
Do install a stop-valve/Shut-off valve and a strainer close to
the unit.
Do provide a water supply with sufficient pressure and pipe
size to ensure an adequate flow rate to all units connected
to the system.
Do use the flexible hose connection with nylon nut provided.
Don'ts
Don’t use a wrench or other tool to tighten the water supply
connection - the nylon nut and rubber washer provided,
should only require tightening by hand to effect a seal. If
water seepage occurs, undo the nut to wipe the washer clean
and re-seat it.
1.3.2 Drain connection
General
Do's
Do ensure metal drain and supply water pipework is
grounded electrically close to the unit (a ground/earth stud
is positioned on the underside of the cabinet).
Drain capacity per cylinder and drain tray pump
= pump discharge rate of max 11.8 l/min at 50 Hz.
Power supply 12.2 l/min at 60 Hz.
Do’s
Do use copper or plastic pipe rated for 110
o
C.
Do arrange to discharge drain water from the unit into a
trapped and vented drain at a position where flash steam
rising from the drain line vent will not pose a problem for
the Vapac or other equipment.
Do provide adequate fall for the drain pipe work to allow free
flow of water drained from each unit.
Do ensure drain line pipe size will accommodate water being
drained at the same time from all the Vapac units which
are connected to it.
Do ensure drain line has a min full of 5°1 in 12 pipe (8%) fall
and sized adequately to take all units connected into it at
fall pump flow rate each LFE unit has two pumps one from
drain tray the other from cylinder both have the same flow
rate as above.
Do run both condensate outlets from unit independently until
both pipes have dropped 100mm before tee together as
shown below.
1.3.3 Drain Tray overflow
The unit is fitted with a drain tray overflow pipe which is not
pumped, this is a pipe from the drain tray direct and requires
a fall to a visual point to indicate the drain tray is full when the
unit is powered off and the drain pump is not working. This is
to prevent damage to ceiling void area.
Drain tray Cylinder ¾” BSP Water
Drain outlet Drain outlet Feed inlet
From this point condensate
pipe can be tee together
and run as one.
15mm pipe connection
for drain tray overflow
when unit is isolated.

7
1.4 Electrical Connections
Transformer supply 230 volts single phase and
natural 50 or 60 Hz supply
1.4.1 Important E.M.C. Considerations
Use a dedicated, earthed metal conduit for both the
control signal cable and the security circuit cables
along their entire length - they may share the same
conduit where practicable. The earth must be made
by "metal-to-metal" contact and should be a good RF
(Radio Frequency) earth.
The control and security circuit connections should be
run in screened cable with the screen grounded at the
VAPANET end (onto the electrical section back
panel). The screen should be maintained as close as
possible to the cable ends and any tail between the
screen and the earth point must be kept short (50 mm
maximum).
Control Cable / Security Circuit
Conduit Entry Arrangement
Control Cable / Security Circuit
Screening Arrangement
Tail to be kept short
(less than 50mm)
Cables to control terminals
Screen left intact
Outer insulation
Earthed back panel
Note:
24 V a.c. Control Circuit -
Transformer Primary Circuit -
3.15 A 20 mm (T – Time Lag) fuse (Pt. N
o
. 1080096) mounted on VAPANET
Echelon PCB (Pt. N
o
.1150655).
There is one control fuse which protects the transformer primary circiut F1 2.0A
(slow blow) (Pt. No. 1080095) mounted in fuse-terminal holder on the main
terminal rail; this fuse protects transformer primary supply the transformer
secondary feeds the Fan and the 24 volts control to the PCB board. The
transformer has the following auto winding tappings for the fan supply.
Auto wind voltage are -5v, 160, 170, 180.190,200, 210, 220 and 230 Volts
All metal surfaces which come
into contact with each other,
must be free of paint, grease,
dirt, etc., thereby ensuring a
good low impedance R.F.
(Radio Frequency) path to
ground.
Electrical section metalwork
Metal conduit

8
1.4.2 Power Supply Connection
The unit requires the following connections:
Single Phase Units (5 kg/h)
Supply L1 to Terminal A1 Neutral to A2:
Two Phase Units: (5 kg/h)
Supply L1 to Terminal A1 Supply L2 to Terminal A2:
In addition all units require a protective Earth to be
connected to the main earth bar.
1.4.3 Electrical Connections
The wiring to the Vapac should be done by a qualified
electrician. The external over current protection and
wiring should comply with the appropriate Regulations
and Codes of Practice.
A fused disconnect/isolator or MCB should be used to
disconnect the supply from all electrodes
simultaneously.
This must be sized to suit the total maximum
phase/line current of the unit and should be located
adjacent to the Vapac cabinet or within easy reach
and readily accessible.
In Vapac VAPANET units terminals L and N are for
the power supply connections.
1.4.4 Cable Entry Provision
Cable glands must be used to ensure cables are held
securely at the entry position.
1.5 Cylinder Electrical demand loads
1.5.1 LFE05 Units
Model Ref. LFE 05 DE-RATED OUTPUT LFE 05 UNIT
Nominal Output Kg/hr 5 5 2.5 3 3.5 4 4.5
Nominal Output lb/hr 11 11 5.5 6.6 7.7 8.8 9.9
Voltage V 200 230 230 230 230 230 230
Power input rating Kw 3.71 3.72 1.86 2.3 2.63 3.07 3.4
Electrical Supply Ph's
Ph+N or
2Ph
Ph+N or
2Ph
Ph+N or
2Ph
Ph+N or
2Ph
Ph+N or
2Ph
Ph+N or
2Ph
Ph+N or
2Ph
No. of electrodes 2 2 2 2 2 2 2
Full load Current A 19.5 17 8.5 10.5 12 14 15.5
Maximum overcurrent A 29.25 25.5 12.75 15.75 18 21 23.25
CSP setting A 19.5 17 8.5 10.5 12 14 15.5
Fuse Rating/phase A 32 32 32 32 32 32 32
Supply cable terminals mm
2
10 10 10 10 10 10 10
Wiring diagram A4-LZD-600

9
1.6 Control Circuit Connections
1.6.1 Control Circuit Wiring
Use a dedicated, earthed metal conduit for both the
control signal cable and the security circuit cables,
sharing the same conduit if practicable.
Use screened cable for all control and security circuit
connections to minimise risk of electrical interference.
The screen should be grounded at the VAPANET end
only. See detail on page 9.
1.6.2 On/Off Control
LFE models can be operated by a single step
humidistat which has Volt-free contacts.
Note: See 1.6.4 Control Signal Selection below.
1.6.3 Proportional Control
The VAPANET Electrode Boiler (LFE) models can all
be operated by either a potentiometric signal or by
one of the following standard proprietary DC analogue
signals.
Input signal:
Standard On/Off
1 0-5 V dc
2 0-10 V dc
3 2-10 V dc
4 1-18 V dc
5 0-20 V dc
6 4-20 mA
7 Pot
Response:
20 -100%
NB. The control signal is connected to ground at
the PCB – if the controller output is referenced to
ground, then the “leg” which is ground must be
the one linked to terminal 5.
5 6 8 9 10
109865
5 6 8 9 10
- +
Proprietary
DC Analogue
Signal.
Potentiometric
Control
Hygrostat ith
Volt Free contacts
Min. 135 Ohms
Max 10k Ohms
Max resistance of external
connection 100 Ohms.
NB
Terminal 5
is connected to
ground!

10
UCP1 (Resistive Input #4)
UCP2 (Resistive Input #3)
UCP3 (Resistive Input #2)
Resistive Input #1
1.6.4 Control Signal Selection
Selection of the control signals is done by resistors
fitted to UCP3
NB As standard (unless stated at time of order)
“On/Off” will be set as standard.
1.6.5 Security Circuit / E.P.O. Shutdown
As standard units are shipped such that terminals 9 &
10 are provided for connection of an E.P.O.
(Emergency Power Off) switch or fire shutdown
facility. Other control interlocks, such as high limit
humidistat, airflow switch and/or fan interlock and time
switches etc. should also be connected here.
Use of the 24V supply of the VAPANET unit
to power other items of equipment will
invalidate the Vapac warranty.
109865
E.P.O.
Fire Stop
Fan
Interlock
S itch
Air Flo
High Limit
Hygrostat

11
CR4
CR2
NET
24 V IN
24 V OUT
0 V
24 V
0 V DO 1 VIOLET
24 V DO 1 PINK
0 V DO 3 VIOLET
24 V DO 3 PINK
0 V DO 2 VIOLET
24 V DO 2 PINK
DI Co . VIOLET
DI 1 PINK
5 V OUT RED
AI 1 WHITE
AI 1&2 Ref VIOLET
AI 2 VIOLET
6
52
33
5
8
41
42
43
44
45
46
47
48
49
50
51
DI2 Pink
58
DI3 Link for Additional
drainage (If required).
1.6.6 Drain operation
As standard the unit is set for “Economy mode”, which
has a reduced automatic drain rate, which will reduce
the amount of hot water (and therefore energy) which
is expelled to drain. If the supply water is very
conductive, or if the unit experiences operational
difficulties it may be necessary to introduce additional
drain cycles – this can be achieved by adding a link
from DI 3 to DI (Com.) as shown.

12
2.0 Start-Up / Operation
2.0.1 Start-up check list
a) Water supply and Drain Connections:
These should be connected as indicated
under Plumbing and in accordance with the
relevant local regulations. An isolation valve
should be adjacent to the unit. The
connecting metal plumbing must be
grounded close to the unit.
b) Steam Line: This must be connected
according to the installation instructions with
adequate slope and support.
c) Power supply: Wiring to the Vapanet unit
should be by a qualified electrician and
comply with the relevant regulations using
appropriately sized cable and cable glands,
with disconnect and fuses to suit the
maximum fuse rating of the unit at the supply
Voltage. The disconnect/fuses should be
adjacent to the unit or within easy reach and
readily accessible.
d) Control Connections: Ensure the control
signal and security circuit are correctly
connected according to the relevant
instructions/diagrams.
e) VAPANET 24v Control Circuit
Transformer: The standard 24V
transformer used in the units has primary
winding for 200V, 220/240V, 380V, 415V, &
440v 50/60Hz connection derived from the
local electrical supply.
Note: 60Hz connection must be specified
with order as 230V 60Hz pump is required.
f) The maximum output & kW rating of the unit
is determined by a Current Set Plug. It is
therefore possible to down rate units to any
output, down to approximately 50% of the full
rated output. (Contact Vapac for further
details)
g) Unit Configuration Plug (U.C.P.) sets the
maximum current level for the unit. It is fitted
directly onto the control P.C.B.
2.0.2 Start-Up Instructions
First check:
a) That the transformer connection matches
supply Voltage.
b) That the security circuit is closed for unit
operation.
Close the electrical access panel.
Turn on the water supply to the unit.
Close disconnect/circuit breaker feeding supply to the
unit.
Close the On/Off switch.
2.0.3 Commissioning/Start-Up
Once the Set-Up procedure has been completed, the
unit is available to operate according to the
requirements of the control signal.
When starting with an empty cylinder, the VAPANET
programme switches in the contactor and feeds water
in until the water reaches the electrodes, and current
starts to flow. Thereafter the VAPANET system will
continuously monitor and control the conductivity by
adjusting the amount of water drained and fed into the
cylinder.
With no demand the LE unit’s user LED’s will be off.
When the demand increases and the unit is switched
on the user LED’s will flash green/amber at a rate
depending on the demand input and the actual
current drawn. The actual run current is monitored
and until the actual current has two feeds above 95 %
the LED will flash green/amber when the current is
above 95% for two consecutive feeds the LED’s will
flash red.
2.0.4 Features of VAPANET Electrode
Boiler Unit
The VAPANET system of control is designed to adjust
the function to keep the unit operating in the face of
changing water quality in the cylinder and changing
electrode condition even if, in an adverse operational
circumstance, this results in some reduction in output
while the situation exists.
Foaming protection
In particular, the VAPANET is designed to prevent the
onset of foaming and to introduce corrective drainage
to keep the unit working.
Automatic switch-off
The VAPANET PCB will stop operating in response to
extreme fault conditions identified as:
Drain Fault STOP (no drain function)
Feed Fault STOP (water not reaching cylinder)
In each case, the display will show the STOP
condition and a Help Message, the User LED’s on the
fascia will indicate the condition see table on page 20.
The STOP condition of a VAPANET PCB will be
cleared by switching the unit off and on. THIS ACTION
SHOULD ONLY BE TAKEN ONCE THE CAUSE OF THE
PROBLEM HAS BEEN ASCERTAINED AND RECTIFIED.
2.1 Service Advice
The water hardness and the humidity demand at site will
determine the effective life of a steam cylinder. Units located
in areas with naturally soft waters will experience the longer
cylinder life, possibly upwards of 12 months in calendar
terms. With hard waters, a more frequent cylinder exchange
must be expected and cylinder exchange 2 or 3 times a year
can be the average situation. The normal scaling up of the
Vapac steam cylinder is outside the Vapac warranty.
2.1.1 Procedure for Cylinder Exchange.
A) Remove the drain tray assembly from the
unit, as follows:-
1. With the power connected to the unit, manually
drain the unit, by depressing (and holding) the
Run/Off/Drain Switch to the momentary drain
position.
2. Disconnect the Vapac from the incoming
electrical supply by means of the external isolator
(disconnect switch). This should be “locked off” to
prevent accidental operation.
3. Remove the steam section access panel.
4. Remove the plug connection for the float
switches and drain tray condensate pump.
5. Remove the electrode connections.
6. Disconnect the drain pump.
7. Remove the steam distribution assembly by lifting
it clear of the cylinder steam outlet boss. Note it
may be necessary to rotate it as it is raised to get
it high enough to clear the boss.

13
8. Remove drain plug from drain tray catching any
water contained in the drain tray into a container
as plug is removed To remove the Drain Tray
please follow instruction shown in Fig. 1 and Fig.
2
9. Standing so as to face the drain cylinder, slide
the drain tray assembly to the right, until the tray
is clear of the mounting support.
10. Lower the cylinder end of the tray below the lip of
the access panel, then slide to the left to clear the
right hand mounting support. When it is clear
lower the drain tray clear of the unit.
B) Remove the cylinder as follows:-
1) Slide the drain pump and feed adaptor away
from the cylinder, until they are clear of the
cylinder feed/drain boss, and the pump body is
clear of the pump mounting plate. Take care to
note the orientation of the pump on the mounting
plate, as it will fit on more than one face of the
pump body.
2) Remove the cylinder mounting screws and
remove the cylinder. Note: There will be residual
water in the cylinder and care should be taken
not to spill this as it could be hot or discolored
and could burn or stain .

14
Other Maintenance:
•Should only be carried out by a qualified
electrician.
•The steam cylinder should be drained prior to
carrying out any maintenance in the steam section
– This must be done prior to isolating the electrical
supply, i.e. before removing the front access panel.
•The unit should be isolated from the electrical
supply before any cover or access panel is
removed.
2.2 Service and Maintenance
As the operation of the Vapac is entirely automatic, it
normally requires no attention on a day-to-day basis.
General cleaning and maintenance of the component parts
of the Vapac are recommended at intervals of about one
year, but this is largely dependent upon the frequency of its
use and the quality of the water supply. Where the Vapac is
part of an air-conditioning system being serviced regularly,
the Vapac should be inspected at the same time.
2.2.1 Feed Valve with Strainer
The nylon bodied solenoid valve incorporates a small nylon
strainer which is a push fit in the 3/4" inlet of the valve. With
a new plumbing installation, residual loose solid material in
the pipework could partially block the strainer after start-up.
If for this or any other reason a restriction of the water flow is
suspected (outside of supply pressure considerations), it
would be possible to clean the strainer as follows:-
Turn off the water supply to the Unit.
Undo the nylon nut connecting the
flexible connection to the valve
inlet .
The strainer can be removed using
‘long-nosed’ pliers to grip the centre
flange provided on the strainer for
this purpose.
Withdraw the strainer.
Wash and replace it.
Reconnect and turn on water
supply.
Reconnect electrical supply to allow
unit to operate.
Note: Always replace the strainer
after cleaning as it is required to
prevent material lodging in the
valve seat or blocking the small
flow control restrictor which is fitted
in the valve.
2.2.2 Drain Pump
The pump should be inspected and cleaned regularly. It
is recommended that this is done at each cylinder
exchange especially in hard water areas. Failure to keep
the pump clear and operational will result in reduced
cylinder life.
To remove the pump for maintenance purposes proceed
as follows:
•Depress and hold the manual drain switch to
empty the cylinder. The pump sound changes
distinctly when the cylinder is empty. When this
occurs release the switch.
•Disconnect unit electrical supply and follow the
steam section removal instructions. Once the
steam section has been removed, the pump
can be removed.
•Ease the pump body away from the cylinder,
sliding it fully off its base plate and release the
connecting tube.. As the pump inlet is
withdrawn from its ‘O’ ring connection, some
hot water may be released, so care should be
taken.
•To dismantle and re-assemble pump refer to
the diagram below.
•In operation the stainless steel shaft remains
stationary while the rotor and impeller rotate on
it. Remove all scale build-up on the shaft so
that the impeller can rotate freely.
•Ensure that the ‘O’ ring seal is correctly
positioned when fitting the inlet housing to the
main pump body. When re-assembling, make
sure the brass spinner is replaced on the
shaft in front of the impeller. A smear of
multipurpose grease should be applied to the
‘O’ ring so that the impeller housing can be
rotated into position without distorting the ‘O’
ring underneath it and so maintain the water
seal.
The steam section should be refitted by following the
removal instructions in reverse order, reversing all
instructions.
Steam and Condensate Hoses
The hoses used with and in the Vapac should be inspected
at the normal service visits as part of normal maintenance.
At the first signs of deterioration, a hose should be removed
and replaced.
Valve with flow
restrictor
3/4 Nylon nut with washer as
part of flexible connector
Strainer
Shaft
‘O’
Ring
Rotor
Impeller Spinner

15
3.0 Location of Indicators and Controls
3.1 Positioning of Indicators and Controls on Vapac ® Vapanet ® LEFC Units.

16
3.2 Initial Set-up
User LEDs
During the initialisation process the User LEDs can be in one of the following
states
User LED State Description
1 RED Flashing
2 second period
Unit initialising. If remains in this state, then unit does not a valid UCP1 fitted.
Prior to the start of the initialisation process, the LEDs will flash Green, Red,
Amber repeatedly for 10 seconds to check that the LEDs are operating
correctly.
Remedy:
1 Check that UCP1 is fitted to plug fitted to CR4 pins 7 & 8 see page 12.

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3.3 Normal Run / Standby / Start-up – No User Intervention Required
User LEDs being off, RED or RED Flashing refer to following table.
User LEDs Description
1 OFF Unit in shutdown.
2 OFF Unit in standby
3
Green Amber
Flashing Variable
RED Flashing
Variable Period or ON
Unit in Startup.
Unit Online.
The variable period is determined by the demand signal.
Demand LED ON RED LED OFF
<12.5% 0.5 seconds 3.5 seconds
<25% 1.0 seconds 3.0 seconds
<37.5% 1.5 seconds 2.5 seconds
<50% 2.0 seconds 2.0 seconds
<62.5% 2.5 seconds 1.5 seconds
<75% 3.0 seconds 1.0 seconds
<87.5% 3.5 seconds 0.5 seconds
>=87.5% ON RED Continually
The above are purely indications of the current state of the unit and require no action
from the operator. When the state changes, the indication will automatically change.

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3.4 Fault / Service Indications – Requiring Operator Intervention.
1, 2 & 3 Fault stop: Once the problem has been cleared the fault can be re-set by the following
procedure.
Power the unit right off, using the local isolator (not the unit on/off switch), waiting ten
seconds then re-applying power.
4 No voltage input: Check the wiring to CR6 and CR7 of the “level sense” daughter board
(part number 1150633-3). If the line voltage can be measured here, check the wiring
between CR1 pins 5 & 6, of the same daughter board and CR2 pins 1 & 3 of the main control
PCB. If this is also correct then either the daughter board or the main control PCB is faulty.
Once the fault has been cleared the LED indications will revert back to the cylinders “current
state”.
5 Service the unit, by following the instructions on pages 15 & 16.
User LED 1 State Description
1 AMBER Drain Fault
2 AMBER Flashing
1 second period Feed Fault
3 AMBER Flashing
2 second period Over current Fault
4 AMBER/OFF/AMBER/OFF
/GREEN/OFF No Voltage input
5 Green Service Now

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3.3 Facia Label symbols
1

20
4.0 Trouble-shooting Check List
-
Use manual drain option to check pump operation
Check/Cause/Remedy
- Check main power is connected and switched on.
- Check power supply fuses.
Preliminary
Symptom
Power-On Neon – Off
Symbol-LED – Off
Display - Blank
Power-On Neon – On
Symbol-LED – On
Display - Blank
- Check if security circuit is open circuit
- Check 24V 3.15A fuse mounted on the Vapanet controller PCB 1150655
Automatic STOP – Feed Fault indicated.
Possibilities
Water is not connected
Water connected but not
reaching cylinder
Water in cylinder and
overflowing
Checks
-Check water stop valve is open.
-Check internal Vapac hose connections for a leak.
-Check internal hoses for kinks or obstructions.
Unit On-Line but inadequate or no steam production .
Possibilities
Contactor not made
Cylinder scaled up.
Checks
-Contactor coil, Control PCB.
-Cylinder Inspection (replace if necessary).
Automatic Stop – Drain Fault indicated.
Possibilities
Drain pump function impaired
Cylinder O/Let Blocked
Checks
-If pump will not function, empty cylinder by disconnecting the water supply hose
between the tundish and the cylinder (at the tundish fill-cup) and lowering it to drain
the water into a bucket. Remove, dismantle and clean pump.
- Check & unblock.