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