VES ecovent EVC User manual

1
ORIGINAL INSTRUCTIONSVES Andover Ltd Eagle Close Chandlers Ford Ind. Est Eastleigh Hampshire SO53 4NF
Tel: [phone] Fax: [phone] E-mail: [e-mail] Web: www.ves.co.uk
Installation, Operation and Maintenance Manual
®
EVCHeat Recovery Unit
VES Ref. ID.1120
Issue D
June 2016
This manual must be read in full before Installation, Operation and Maintenance of the units supplied
Please ensure that this document is passed to the end user. This manual forms an integral part of
the product and should be kept for the working life of the product. Additional copies of this and
supporting documents are available by contacting VES or by visiting www.ves.co.uk and following
the 'Download O & M's' link.
The following symbols used within this document refer to potential dangers, advice for safe
operation or important points of reference
Indicates hazards associated with electric current and high voltages
Indicates hazards that require safety advice for personnel or potential unit/property damage
Indicates important information
page
Introduction 1
Nomenclature2
Receipt of Goods & Handling 3
Installation 3
Standard Wiring & Fan Installation 8
Maintenance 15
The Ecovent® EVC series is a range of Heat Recovery units, with duties up to 1.3 m³/s. Suitable for
either plantroom, ceiling void or internal locations. As standard, each unit will have been supplied
pre-wired to an isolator or fitted control panel, as specified at the time of order.
The standard operating temperature of these units is -20 to +35 °C.
For further technical details regarding dimensions and weights, contact VES on 08448 15 60 60,
quoting the sales order (SO) number and the unit type as found on the unit nameplate, or
alternatively visit www.ves.co.uk.
Warning
Caution
Important
Important
Introduction
1
2
3
4
5
6
1
Contents

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ORIGINAL INSTRUCTIONSVES Andover Ltd Eagle Close Chandlers Ford Ind. Est Eastleigh Hampshire SO53 4NF
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Installation, Operation and Maintenance Manual
®
EVCHeat Recovery Unit
Nomenclature
Part Number Coding
Point Description Point Variants Details (as appropriate)
1Product EV Ecovent® Acoustic Heat Recovery Units
2Heat Recovery type CCounterflow plate heat exchanger
3Unit Size 0...5 Sequential see unit outline for details
4Fan Type 4...7 Centrifugal EC fan
5Fan Size 2...7 Sequential
6Phase -1 230V 50Hz Single Phase
-3 400V 50Hz Three Phase
7Unit Configuration /FP Flat Plantroom
/SP Stacked Plantroom
8Main Heating Null No Heating
-E Electric Heater Battery
-W LPHW Coil
9Infill /DS 25mm double skinned
/EE 50mm double skinned
10 Handing /LTLeft/Top Access
(denotes position of /RTRight/Top Access
supply airflow LIDSAF) /LB Left/Bottom Access
/RB Right/Bottom Access
/L Left (stacked)
/R Right (stacked)
11 Main Filter Null No filter
/G4 EU4 Pleated Filter
/F7 High efficiency pleated filter
12 Control Panel Section /CPSC Fitted control panel
/ISC Fitted isolator/speed controller
13 Colour Null Galvanised finish
/R7004 Powdercoated finish, RAL7004 etc...
14 Powder Coat Type Null As colour
/IT Internal powdercoated only
/BTInternal/External powdercoated
15 Special /S Special (non-standard) Unit
EVC152-1/FP-W/EE/RT/G4/CPSC/S
EV C15 2-1 /FP -W /EE /RT /G4 /CPSC /S
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Typical Example
2

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Installation, Operation and Maintenance Manual
®
EVCHeat Recovery Unit
Immediately upon receipt of goods, check for possible damage in transit paying particular
attention to fan impellers, coil connections and unit casing. Prior to installation please check
to ensure alignment and smooth rotation of the impeller after transit. Also check to ensure that
any ancillary items are included. These will normally be supplied fitted or, in the case of small
items, taped to the unit.
In the event of any damage having occurred or if any item is found to be missing, it is essential
to inform VES Andover Ltd. within 7 days of delivery quoting sales order number and the unit
type, as found on the unit nameplate. After this period, VES would be unable to accept any
claim for damaged or missing goods.
The entire system must be considered for safety purposes and it is the responsibility of the
installer to ensure that all of the equipment is installed in compliance with the manufacturer’s
recommendations, with due regard to the current HEALTH AND SAFETY AT WORK ACT and con-
forms to all relevant statutory regulations.
Where a unit is installed so that a failure of components could result in injury to personnel,
precautions should be taken to prevent such an injury. If the unit is installed where there is a
reasonable possibility of persons or objects coming into contact with the impeller whilst
operational, a guard should be fitted or steps taken to prevent this. It is the installer’s
responsibility to ensure that access panels are not obstructed in any way and safe working
access for maintenance must be provided in accordance with Health and Safety and Building
Regulations. For confirmation of required access please see the appropriate unit outline
drawing.
Consideration must also be given by the installer for adequate illumination of the unit location
in order for safe maintenance. Further consideration should be given to the unit’s position and
secured into place as appropriate. This is especially important with external mounting as the
wind and elements may effect the overall stability and safety of the unit.
Mounting hangers, door furniture, isolators etc. extend beyond the casework and so are
vunerable to accidental damage. Take necessary precautions so as not to cause damage whilst
handling the unit.
The weight of each unit/section is specified on the outline drawing and the total unit weight
will be displayed on the unit inspection label. When lifting the unit using a fork lift truck
ensure the whole unit is supported by the full length of the forks. It may be necessary to use
fork extensions to fully support the unit properly. The centre of gravity may be offset from the
centre of the unit; this needs to be taken into consideration when lifting the unit.
Handle with care. Failure to fully support the unit during lifting may result in damage to the
unit casework Handles, lids, housings and coil connections must NOT be used as lifting points.
Units are to be rigged and lifted using spreaders, taking
into account the weight of the unit, and lifting gear should
be arranged so as not to bear on the casework see right.
Caution
Receipt of Goods
& Handling
Installation
3
Lifting Detail
Fig.
2
4
Fork Lifting Detail
Fig.
1
Caution

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Installation, Operation and Maintenance Manual
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EVCHeat Recovery Unit
Continued
Ecovent® EVC units are supplied with feet suitable for floor or ceiling-void mounting, either by
use of drop-rod mounting, in either top or bottom access orientation, with airflow in the
horizontal plane. For alternative mounting please consult your outline drawing as supplied with
the unit, or refer to VES Customer Services for further information.
Secure drop rods/unit with the appropriate fixings as shown below .
Self-levelling feet are available for floor mounting, with fixings as per drop rods . The unit can
be further secured to the floor via knockout fixings holes on the feet, fixings to be supplied by
others .
When hanging units from drop-rods, ensure that the load is evenly spread and that ALL feet are
used within the support, including those for fitted silencers if included.
Ensure that the drop rod used is selected appropriatedly to accomodate the load of the unit.
Unit mounting detail
Fig.
3
4
5
Installation 4
Important
EVC units with fitted silencers are sectional and handed. It is important that all sections are
joined together securely prior to positioning and installation. Remove and retain the fixings
from the joining bracket. Butt the correct silencer to the unit section ensuring the unit spigots
enter the silencer section fully see fig.
6
. This joint should be assembled using self-adhesive
rubber tape at the joints prior to assembly so as to prevent air leakage; replace with similar if
damaged. Finish the assembly by installing the joint fixings through both parts of each joining
bracket and tighten using a 6mm hex key, drawing the sections together evenly see fig.
7
.
Section joining detail
Fig.
6
7
Caution Joining brackets are NOT structural and are included as part of the unit sealing only.
When moving assembled units ensure that ALL sections are fully supported.
7
6
3
4
5
3
4
5

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Installation, Operation and Maintenance Manual
®
EVCHeat Recovery Unit
Continued
When accessing the unit ensure the access panels are handled/opened in a controlled manner
so as to avoid damage to the unit or injury to personnel. This is particularly important with
bottom access units. Ensure the AHU has been allowed to completely cool before attempting
any work to the unit
Some units feature dual hinge/handles meaning access doors can be opened either way or
removed completely.
Each handle assembly features a lockable handle, secured as standard by an M4 Hex key.
In order to open the hinges correctly the locks must be in the open position. This is clearly
marked on the handle (see Fig.
9
) ; failure to do this may result in permanent damage to the
lock/handle mechanism.
When closing/replacing doors, ensure that all handles are fully closed and all locks are
returned to the closed position.
Installation 4
Access
Caution
Locked Unlocked
1
2
Dual Hinge handle
Fig.
8
Lock and release action
Fig.
9
10
Access opening/removal
options
Fig.
11
Caution
10
9

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Installation, Operation and Maintenance Manual
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EVCHeat Recovery Unit
Continued
On EVC/ -E units, an electric heater battery (EHB) will be installed. Supply to the heater should be
1Phase or 3Phase with separate neutrals; confirmation of this can be found on the unit nameplate.
Cables should be of silicone rubber, fibreglass or of a similar high temperature insulated type and
be installed to current I.E.E. Regulations, ensuring a sufficient earth connection to the terminal
provided. Care should be taken not to overstrain the terminal pillars as this may permanently
damage the elements.
The heater is fitted with a manual-reset high temperature cutout with normally closed (NC)
terminals and is set to break if the duct temperature rises above 130 °C.
It is important that the cutout is connected to the safety circuit so the heater is isolated in the
event of overheating caused by airflow failure.
The electrical supply must be isolated before attempting to reset the manual cut-out and should
be given sufficient time to cool. For further information regarding electric heaters please see
VES Ref. ID431.
If a speed controller is fitted to the system, it must not stop the fan independently of the control
system, or allow airflow to fall below the stated volume on the electric heater battery. Suitable
speed controllers without on/off switches are available from VES Andover.
Coils should be piped according to any relevant local codes of practice. Where threaded
connections are supplied, the only approved method of jointing method is by use of Boss white
and hemp. The thread fitted to the coil is to be supported at all times whilst making joints. All
external piping is to be supported independently from the coil. Fluid filters are recommended.
It is important that water and steam coils are protected against damage from extreme weather
conditions during the winter season. If the water is allowed to freeze in the coil system,
damage may occur potentially bursting pipes and resulting in emergency problems.
Fitting a frost thermostat at the unit inlet and ensuring that boilers run continuously in low
ambient temperatures can help to prevent this.
Heating coils do not cool immediately when the hot water supply is cut off. The residual heat
must be dissipated to avoid damage. The continuous running of the fan after shutdown
resolves this, by operation of a run-on timer.
The recommended length of run-on is 2 minutes minimum.
On Ecovent® EVC / -W units, a Low Pressure Hot Water (LPHW) coil will be installed. The coils are
normally suitable for LPHW at 82 °C flow and 71 °C return temperature. LPHW coils are supplied as
standard with an air vent and drain plug located on the pipe work immediately adjacent to the coil
connections on the AHU. The air vent should be at the highest point, with the drain at the lowest.
The coil should be regularly vented so as to avoid potential air locks, resulting in a fall off of duty.
Installation 4
Typical LPHW Coil
Fig.
12
Caution
Coils
Electric Heater
Batteries
Caution
LPHW Coils
Flow
Return
Caution
It is recommended that a check be made as to
whether any treatment is required to the water
supply for prevention of corrosion and scaling of
the equipment. Information regarding the necessary
action to be taken can be obtained from the relevant
Local Water Supply Authority.
The unit will have been supplied with connections
either left or right-hand side looking in direction of
airflow. Please see order acknowledgement for
confirmation of this handing. Should you need to
alter this please consult VES as unit adjustment may
invalidate your warranty.
Airflow

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Installation, Operation and Maintenance Manual
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EVCHeat Recovery Unit
Installation 4Continued
A drain pan is fitted to all units and a peristaltic pump is fitted as standard for units size 0 to 4
and will require customer connection to an appropriate waste system from the pump outlet.
It is important that the unit be mounted level. Failure to do so may mean the pump sensor is
not level and so compromise its operation. The pump has been design for use with water only.
As standard the position for the primary pump output is next to the controls section. Should
this position be inappropriate an alternate position is available on the opposite side of the
unit (see below). The necessary pipework to use this secondary position is already in place but
it will need to be connected to the outlet on the pump.
Doors and panels removed for clarity
Before the unit is fully operational it is recommended to perform an initial test to confirm the
pump and sensor are operating correctly. Ensure that all debris is removed from the
condensate drainpan. Manually add enough water to the drain to ensure the pump sensor float
switch is activated. Turn the unit on and check that pump starts and then stops as the water
level decreases.
The EVC Size 5 drain pan is fitted with an internal spigot suitable for connection with a Ø15 mm
push-fit straight connector, to be supplied by others. Terminate through the case onsite as
required, ensuring that any swarf is removed. Connect to an appropriate waste system ensuring
the connection is trapped correctly.
Condensate Trapping
Typical
Pump connections
Fig.
14
Drain pan connection
(typical)
Fig.
13
Caution
Drain pan
Secondary
Outlet Pump
Sensor
Primary
Outlet
IN
OUT IN
OUT

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ORIGINAL INSTRUCTIONSVES Andover Ltd Eagle Close Chandlers Ford Ind. Est Eastleigh Hampshire SO53 4NF
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Installation, Operation and Maintenance Manual
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EVCHeat Recovery Unit
The electrical supply must be fully isolated before attempting to affect any work on this unit.
All electrical connections to any unit must be carried out in accordance with the current edition
of the I.E.E Regulations, only competent Electricians should be allowed to affect any electrical
work to our units.
It is recommended that the cable entry point should be at the end of the control section as
shown below in figure
15
. It is the responsibility of the installer to ensure that a suitable
cable gland (giving adequate protection and strain relief) is fitted, and in doing so also ensure
that no internal components are damaged during this installation. Take particular care to note
the position of the drain outlet and associated pipework. Make certain all swarf is removed
before use.
It is the customer’s responsibility to supply earth fault protection through the building
installation device and a dedicated, isolated power supply with overload protection, to account
for motor start up currents. See page 9 for specific fan details Fig.
16
.
Do not connect any unit to an electrical supply voltage outside of the specification.
The following wiring diagrams are a guide to installing the standard fan and actuator options
found on Ecovent® EVC units. If in any doubt, for units with fitted VES controls or for special
versions of the units, consult the wiring diagram in your document pack or contact VES
Customer Services Department on 08448 15 60 60, quoting the sales order (SO) number and
unit type as found on the unit name plate.
For incorrect fan rotation, check with the VES Service Department for advice, on
08448 15 60 60.
Standard Wiring
& Fan Installation
5
Warning
Important
Warning
Recommended
cable entry points
Fig.
15
Recommended
cable entry points

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Installation, Operation and Maintenance Manual
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EVCHeat Recovery Unit
Standard Fan Details
Fig.
16
Standard Wiring
& Fan Installation
5Continued
90
1
05
120
60
75
90
1
05
120
45
30
1
BK
2
RD
3
WH
–+
T~
L
R
CM24-SR/NM24 Damper Actuator
To isolate from the main power supply, the system must incorporate a device which
disconnects all the phase conductors
Warning
Standard wiring
arrangement
Damper Motor Terminals
Fig.
17
AC 24 V 50Hz / DC 24 V
Size Phase
Motor
Size Voltage
Fan
(rpm)Speed
Full Load
Current
Speed
Control
EVC152-1
EVC -1073
1 Phase 0.169 kW 230 VAC 4120 1.35 A EC
1 Phase 0.1 kW 230 VAC 0 A EC
00 141 0.83
EVC243-1 1 Phase 0.23 kW0 230 VAC 3290 1.65 A EC
EVC262-1 1 Phase 0.50 kW0 230 VAC 3000 2.6 A0 EC
EVC362-1 1 Phase 0.50 kW0 230 VAC 3000 2.6 A0 EC
EVC445-1 1 Phase 0.40 kW0 230 VAC 2010 2.1 A0 EC
EVC446-1 1 Phase 0.87 kW0 230 VAC 2200 4.5 A0 EC
EVC547-3 3 Phase 400 VAC 2100 2.40 A EC
1.350 kW

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Installation, Operation and Maintenance Manual
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EVCHeat Recovery Unit
(Not fitted on EVC5)
Standard Wiring
& Fan Installation
5Continued
16
16
Standard Isolator
arrangement
Fig.
18

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Installation, Operation and Maintenance Manual
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EVCHeat Recovery Unit
Standard Wiring
& Fan Installation
5Continued
Standard CPB Control Panel
Arrangement
Fig.
19
Continued over on page 12...
Supply Fan
Supply Filter Airflow
Switch (SELV)Pressure
Op"onal Supply
ovingAirflow Pr
Switch (SELV)
0-10V
Supply Fan
Speed
Signal
+10V
0V
0-10V
O 0-10Vp"onal Supply
Pressure Transducer (SELV)
IN
OUT
GND
Supply Fan
(230 VAC or 400 VAC
For fan details
see Fig. )
Energy Recovery
0-10V Output
24 VAC AUX SUPPLY
MAX 1A
24 VDC Fire Alarm
Shutdown Signal (SELV)
Supply Fan Enable
(24/230VAC 3A MAX)
Extract Fan Enable
(24/230VAC 3A MAX)
Op!onal V/F
BMS Common Trip
Fresh Air Sensor
(SELV)
Return Air Sensor
(SELV)
Supply Air Sensor
(SELV)
Customer
Connec!ons
Customer
Connec!ons
400 V 3~50Hz
(For 1Ph Supply
Link L1, L2 & L3)
EPEL9041
Basic Room Unit
Op!onal
Fascia Mounted
HMI Panel
Thermal Cut-out
(230 VAC)
EH B
Electric Heater Ba# ery
(230/400 VAC)
Frost Stat
Closed = Frost
(SELV)
With
Electric Hea"ng
Extract Fan
(EHB)
Airflow Pressure Switch
(230 VAC)
EH B
Op"onal Extract
ovingAirflow Pr
Switch (SELV)
Extract Filter Airflow
Switch (SELV)Pressure
0-10V
Extract Fan
Speed
Signal
Hea"ng
Valve
Control
+10V
0V
0-10V
O 0-10Vp"onal Extract
Pressure Transducer (SELV)
IN
OUT
GND
Extract Fan
(230 VAC or 400 VAC
For fan details
see Fig. )
With
Water Hea"ng
(LPHW)

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Installation, Operation and Maintenance Manual
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EVCHeat Recovery Unit
Standard Wiring
& Fan Installation
5Continued
Continued from page 11..
(Not fi" ed on EVC5)
16
16
Standard CPB Control Panel
Arrangement
Fig.
20

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Installation, Operation and Maintenance Manual
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EVCHeat Recovery Unit
Standard wiring arrangement
Valve Actuator Terminals
Fig.
21
Standard Wiring
& Fan Installation
5Continued
SGS65... Valve Actuator
To isolate from the main power supply, the system must incorporate a device which disconnects
all the phase conductors
Warning
Prior to starting the unit it is important to ensure that the fans are free running, and should
any components have moved during transit take care to ensure they are realigned to allow
correct operation/rotation. A trial spin by hand should indicate if the fan is rubbing. To align,
losen either the fan plate fixings or the inlet ring, adjust and retighten, see figure above.
The same should be applied to any wiring looms which may have become unfastened; ensure
that loose wiring is securely stowed away from any moving components.
The impellers on size zero units are not adjustable; any alignment issues should be reported
to VES.
Fan alignment details
Fig.
22
Important
22
123 4 6
5 7
24 V
GND
Frost
Sensor
Valve N/A Supply
Air
Sensor
0-10 V
Customer
Terminal Box

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Installation, Operation and Maintenance Manual
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EVCHeat Recovery Unit
Continued
Unit sizes 2 to 5 in the Ecovent® EVC range feature tapped inlet rings it is possible to establish
the volume flow rate by measuring the static pressure rise into the fan.
The centrifugal fans have infinite speed adjustment, the benefits of real energy savings are
apparent when the fan speed is reduced; this is best demonstrated when used in conjunction
with additional sensors such as air quality or occupancy.
Using a micro manometer and adjusting the fan speed it is possible to commission each fan to
the required air volume. Each fan section has a differential pressure tapping connection point;
by connecting your micro manometer to the appropriate pitot a differential pressure reading can
be taken. This measurement can then be applied to the calculation as below or by using the
differential pressure curve. Simply read across from the pressure measurement to the fan curve
and down to calculate the resultant air volume. If the unit features a fitted control panel this
action can be undertaken within the programming available; see the accompanying controls
documentation for further operational details.
Example: Measured differential pressure: 150 Pa
This measurement can then be expressed in the following calculation:
whereqVis the air volume in m³/s
k is the fan nozzle coefficient (See Below Graph)
pWis the measured differential pressure in Pa
Measured differential pressure: 150 Pa
qV= (142 150) / 3600
qV= (142 x 12.247) / 3600
qV= 1739 / 3600
qV= air volume = 0.48 m³/s
Standard Wiring
& Fan Installation
5
Differential pressure
curve Fig.
24
Example: Measured differential pressure: 150 Pa
Air Volume: 0.48 m3/s
Differential pressure
calculation Fig.
23
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
Resistance - Pa
0
50
100
AirVolume - m³/s
00.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5
•
243-1 K=68
445-1 K=96
446-1 K=142
262-1 & 362-1 K=60
547-3 K=180

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Installation, Operation and Maintenance Manual
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EVCHeat Recovery Unit
Maintainance 6
Before attempting to carry out any work on our units, all accompanying documentation
including warning labels on the unit must be referenced.
Should it be necessary to remove any component ensure that these are secured into position
once reinstalled. It is critical that after any maintenance work has been conducted that all
components removed/replaced be refitted correctly by a competent engineer.
Before attempting to carry out any maintenance work, investigative or repair work on our
units, the unit MUST BE COMPLETELY ISOLATED from its electrical supply. Ensure a minimum
of two minutes after electrical disconnection before removing access panels. This will allow
any moving parts to come to a rest.
Care should also be taken when accessing external units as the wind and elements may cause
moving parts to ‘windmill’.
In general, this series of units require little maintenance. In the unlikely event of component
failure, spares are available from stock at VES Andover Ltd.
When accessing the unit ensure the access panels are handled/opened in a controlled manner
so as to avoid damage to the unit or injury to personnel. This is particularly important with
bottom access units. Ensure the AHU has been allowed to completely cool before attempting
any work to the unit
For units featuring dual hinge/handle access, please see page 5 for further details
For bottom access units, should it be necessary to remove the heat exchanger from the unit
casework take care to ensure that all components are correctly supported during their removal.
Remove the lids and central mullion from the unit, exposing the bypass damper. As an additional
safety measure some components are held into place using PK screws. Remove the required
components with care and ensure all components are replaced correctly.
Ecovent® EVC units feature plug & socket connections to allow easy removal/replacement of
key components. Separate the plug connection by hand (tools not required) by lifting the
locking lever
25
and pulling the plug/socket apart
26
. DO NOT pull the cable to separate the
assembly.
Upon reconnection, the assembly features a locating lug to ensure correct orientation. Once
rejoined, lock the connection together again using the locking lever as shown.
Plug & socket operation
Fig.
25
26
Important
Warning
Caution
26
25

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Installation, Operation and Maintenance Manual
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EVCHeat Recovery Unit
Maintainance 6
Important
Continued
Ecovent® EVC units feature a bulkhead-mounted fan plate assembly.
Ensure that special care is taken when removing/replacing components/assemblies from
bottom-access units. For larger components this may require the use of two or more persons.
The mounting plate is slotted to aid plate alignment. It is important to keep the fan assembly
supported at all times; the fan assembly should not be considered supported until all fixings are
securely tightened.
To remove the fan assembly Fig.
26
, ensure the unit is fully isolated. Separate the supply plugs
to the fan as shown above
24
.
1
Detach the measuring tube from the inlet ring and stow the
tube clear.
2
Back-out the bottom screws but do not remove .
3
Remove the top fixings
completely and retain . Carefully lift the fan assembly over the retained fixings and remove the
fan assembly from the unit.
Fan assembly removal/
installation (1 - 5)
Fig.
26
1
2
3

17
ORIGINAL INSTRUCTIONSVES Andover Ltd Eagle Close Chandlers Ford Ind. Est Eastleigh Hampshire SO53 4NF
Tel: [phone] Fax: [phone] E-mail: [e-mail] Web: www.ves.co.uk
Installation, Operation and Maintenance Manual
®
EVCHeat Recovery Unit
To replace the fan assembly, ensuring the pitot tapping on the fan inlet ring is accessible,
locate the mounting plate over the fixings retained in the unit bulkhead.
2
3
Secure the
loose fixings through the mounting plate and tighten all the mounting fixings.
1
Attach the
measuring tube to the pitot tapping on the inlet ring ensuring that it is clear of all moving
parts. Reconnect the supply plugs as in Fig.
24
; if more than one plug is used, ensure the
correct plugs are reconnected as marked.
Ensure that the fans are free running by following the fan alignment instructions on page 13,
adjust as required.
EVC size Zero units feature a double inlet centrifugal fan mounted on an adapter plate.
To remove, unplug as per Fig. undo the two screws and carefully remove the fan/adapter
plate assembly, retaining all fixings.
To replace the fan assembly, secure one fixing leaving enough of a gap to allow the adapter
plate to slide into place. Fit the remaining fixing and tighten both. Ensure the impellor is free
running. Reconnect the supply plugs as in Fig. ; if more than one plug is used, ensure the
correct plugs are reconnected as marked. There is no pitot on this fan assembly.
Maintainance 6Continued
Fan assembly removal/
installation (zero)
Fig.
27
24
27

18
ORIGINAL INSTRUCTIONSVES Andover Ltd Eagle Close Chandlers Ford Ind. Est Eastleigh Hampshire SO53 4NF
Tel: [phone] Fax: [phone] E-mail: [e-mail] Web: www.ves.co.uk
Installation, Operation and Maintenance Manual
®
EVCHeat Recovery Unit
Three Monthly Checks
Six Monthly Checks
Twelve Monthly Checks
Spares & Repairs
Recommended Checks
Continued
In order to keep the unit in good order the following maintenance routine is recommended:
Filters should be inspected every three months. If they are found to be heavily soiled or damaged in
any way they should be replaced. Spare filters can be ordered from VES Spares Department.
The fan impeller should be cleaned every 6 months. Failure to clean the fan on a regular basis could
result in loss of fan performance, or cause it to fall out of balance. If a fan is stationary for long periods
in a humid atmosphere, it should be switched ON for minimum of two hours every month to remove
any moisture that may have condensed within the motor.
The fan motors are maintenance free due to the use of ball bearings with ‘life-long lubrication’.
At the end of the grease life it will be necessary to change the bearings or change the fan unit. The life
expectancy of bearings for standard usage is approximately 30 - 40000 hours.
Failure to keep dampers clean could result in the damper becoming inoperative. Clean damper blades
and frames and lubricate with PTFE aerosol or equivalent.
The heat exchanger matrix should be inspected for debris, dust or dirt build up. If found contaminated,
foreign matter should be removed accordingly; superficial dust or debris can be removed from the
surface of the heat exchange by gently brushing. Loosened debris can then be vacuumed from the
surface of the matrix or flushed through with warm water. Stubborn deposits can be removed by using
a low pressure washer with an approved detergent solution. The solution temperature should not
exceed 50 °C. When using any pressure device care must be taken not to damage the heat exchanger
matrix.
Under NO circumstances should the heat exchanger be steam cleaned.
Ensure the drain pan and the drain connection is free from debris ensuring any condensate produced
can freely drain away. Where a pump is fitted check the sensor and float for contamination. Clean as
required using a 95 / 5% Water/Chlorine solution. Check also all associated pipework. Any found to
be damaged or blocked should be replaced, spare replacement pipes being available from VES.
Should a full service be required it may be necessary to disassemble the unit casework to gain access
to some components.
Ecovent® EVC units are supplied with unpainted galvanised steel cases as standard but have an
option for powder coat paint finish. Check all painted items to ensure that they have not deteriorated,
particularly where adverse environmental conditions prevail. Re-paint as necessary. Matching paint can
be supplied upon request.
When enquiring after or ordering spares contact VES Spares Department, quoting the sales order (SO)
number and unit type as found on the unit nameplate.
Tel: [phone] • Fax: [phone]
At the end of their useful life the packaging and product should be disposed of via a suitable
recycling centre. Do not dispose of with normal household waste. Do not burn.
PLEASE ENSURE THAT THIS DOCUMENT IS PASSED ON TO THE END USER
We reserve the right to alter the specifcation without notice ©VES Andover Ltd. 2016.
No part of this publication may be photocopied or otherwise reproduced without the prior permission in writing
of VES Andover Ltd.
Maintainance 6
Caution
WEEE Directive

Declaraon of Conformity
Date:
Product: Ecovent EVC Heat Recovery Units
Type: EVC
Manufacturer: VES Andover Limited
The product above is produced in accordance with EC Council Direcves:
2004/108/EC (Electromagnec Compability Direcve)
2006/42/EC (Machinery Direcve)
The European Harmonised Standards applied are:
BS EN ISO 12100:2010, BS EN ISO 13857:2008, EN61000, EN 60204-1, BS EN 60950-1:2006
Basis of Self aestaon:
Quality Assurance to ISO 9001-2008, BSI Reg. Firm Cert. No. Q05375
Signature of Manufacturer:
Name: Signature Posion of Signatory:
R. Peters Deputy Managing Director
K. Feeney Engineering Associate Director
VES Andover Ltd.
Eagle Close, Chandlers Ford Ind. Est.
Eastleigh, Hampshire SO53 4NF
Tel: [phone] Fax: [phone]
E-mail: [e-mail] Web: www.ves.co.uk
20th. May 2015