St James Hall 97-103 Wilsham Street London W11 4AU PLANT

St James Hall 97-103 Wilsham Street London W11 4AU PLANT
REPORT No. 660125-3
St James Hall
97-103 Wilsham Street
London
W11 4AU
PLANT NOISE ASSESSMENT
REPORT
PREPARED:
Presented By:
31st August 2016
Paul Cotton
CONTENTS
1
Introduction
2
Limiting Plant Noise Levels
3
BS4142
4
BS4142 Assessment
5
Noise Mitigation Measures
6
Conclusion
Appendix 1:
Glossary of Terms
St James Hall – 97-103 Wilsham Street
Plant Noise Assessment Report
---------------------------------------------------------------------------------------------------------------------------1.0
Introduction
1.1
Rundell & Associates has commissioned Noico Ltd to carry out a plant noise
assessment for the proposed mechanical plant to be installed at St James Hall, 97-103
Wilsham Street, London, W11 4AU in the Royal Borough of Kensington & Chelsea.
1.2
The site is located on a residential road consisting in the main of 2-3 storey terraced
residential housing. Commercial premises are located nearby on the opposite side of
the junction of Wilsham Street and St Anns Road.
1.3
We understand that the current proposal is for the installation of plant items, namely 1
no. condensing unit which is to be located externally within the west garden in addition
to 1 no. AHU and 1 no. MVHR unit, both of which are proposed to be installed within
the basement plant room. The fresh air inlets and exhaust openings of said plant are to
terminate externally within the general confines of the west garden.
The closest noise sensitive residential property is considered to be located adjacent
and to the west of the project site at 105 Wilsham Street.
2.0
Limiting Plant Noise Levels
2.1
An environmental noise level survey has been undertaken by Noico Ltd on 1st April
2016, the results of which are detailed in our report Ref:660125-2 dated 20th April 2016.
2.2
It is understood that the proposed plant has the potential to operate 24 hours a day.
The following noise criterion is therefore applicable and should not be exceeded at the
nearest noise sensitive receiver:
24 Hour Operation
-
23dB LAeq
Note: This level must be achieved cumulatively with all plant operating, and as
measured at 1 metre from the window of the nearest affected property.
3.0
BS 4142
3.1
Using BS 4142 the likelihood of complaints from local residents due to plant noise
emissions is assessed by the difference between noise from the new source(s) and the
existing background level. The noise from the new source(s) is expressed in terms of a
rating level, calculated from the specific noise source(s) plus any ‘acoustic feature
corrections’ and is given as an LAeq,T noise level.
3.2
The acoustic feature correction is applied where the source emits noise of a tonal,
impulsive or intermittent nature.
3.3
The existing background noise level is expressed in terms of an LA90,T noise level.
The rating level can be subtracted from the background noise level to determine noise
impact against the design criteria.
4.0
BS 4142 Assessment
4.1
The plant in question is as follows:
660125-3
31/08/16
page 1 of 5
St James Hall – 97-103 Wilsham Street
Plant Noise Assessment Report
---------------------------------------------------------------------------------------------------------------------------1 no. Daikin condensing unit, model RXYSCQ4TV1 having a manufacturer’s sound
pressure level (S.P.L.) of 51dB(A) when measured at 1 metre.
1 no. Recotherm air handling unit, model Aeris 100 having the following manufacturer
confirmed linear fan sound power levels:
Frequency:
Supply:
Extract:
63
66
64
125
69
67
250
75
69
500
75
69
1k
75
65
2k
70
61
4k
68
62
8k
61
54
Hz
dB
dB
1 no. Systemair MVHR unit, model Topvex FR06 having the following fan sound power
levels:
Frequency:
F.A.I.
Exhaust:
63
71
73
125
70
72
250
61
76
500
44
63
1k
41
66
2k
34
61
4k
27
54
8k
28
48
Hz
dB
dB
Please note: the noise levels detailed above for the Topvex unit are linear sound power
levels and have been corrected from the A-weighted sound power levels detailed within
the manufacturer’s literature.
4.2
The distance from the plant to the nearest affected windows varies depending upon
plant or inlet/exhaust location.
4.3
We believe that all the units have a smooth curve across the frequency spectrum and
that no acoustic feature correction need be added.
4.4
The following tables show our BS 4142 calculation for the plant emissions to the
nearest noise sensitive receiver:
DAIKIN CONDENSING UNIT RXYSCQ4TV1
Daikin Model RXYSCQ4TV1 SPL @ 1m
Directivity
Distance correction
Receiver façade correction
A-weighting correction
A-weighted SPL @ 1m from receiver façade
63
49
6
-18
3
-26
14
125
53
6
-18
3
-16
28
250
49
6
-18
3
-9
31
500
52
6
-18
3
-3
40
FREQUENCY
1k
2k
4k
47
40
33
6
6
6
-18
-18
-18
3
3
3
0
1
1
38
32
25
Specific single figure noise level
8k
25
6
-18
3
-1
15
43
Hz
dB
dB
dB
dB
dB
dB
dB(A)
63
66
-14
5
-27
3
-26
7
125
69
-10
5
-27
3
-16
24
250
75
-7
5
-27
3
-9
40
500
75
-6
5
-27
3
-3
47
FREQUENCY
1k
2k
4k
75
70
68
-7
-8
-8
5
6
6
-27
-27
-27
3
3
3
0
1
1
49
45
43
Specific single figure noise level
8k
61
-8
6
-27
3
-1
34
53
Hz
dB
dB
dB
dB
dB
dB
dB
dB(A)
63
64
-14
5
-27
3
-26
5
125
67
-10
5
-27
3
-16
22
250
69
-7
5
-27
3
-9
34
500
69
-6
5
-27
3
-3
41
FREQUENCY
1k
2k
4k
65
61
62
-7
-8
-8
5
6
6
-27
-27
-27
3
3
3
0
1
1
39
36
37
Specific single figure noise level
8k
54
-8
6
-27
3
-1
27
45
Hz
dB
dB
dB
dB
dB
dB
dB
dB(A)
AERIS 100 POOL AHU FRESH AIR INLET
Aeris100 Supply Fan SWL
Duct losses including end reflection
Directivity
SWL to SPL including 6m distance correction
Receiver façade correction
A-weighting correction
A-weighted SPL @ 1m from receiver façade
AERIS 100 POOL AHU EXHAUST
Aeris100 Extract Fan SWL
Duct losses including end reflection
Directivity
SWL to SPL including 6m distance correction
Receiver façade correction
A-weighting correction
A-weighted SPL @ 1m from receiver façade
660125-3
31/08/16
page 2 of 5
St James Hall – 97-103 Wilsham Street
Plant Noise Assessment Report
---------------------------------------------------------------------------------------------------------------------------TOPVEX FR06 MVHR FRESH AIR INLET
Topvex Supply Fan SWL
Duct losses including end reflection
Directivity
SWL to SPL including 6m distance correction
Receiver façade correction
A-weighting correction
A-weighted SPL @ 1m from receiver façade
63
71
-13
7
-29
3
-26
13
125
70
-10
7
-29
3
-16
25
250
61
-6
8
-29
3
-9
28
500
44
-3
8
-29
3
-3
20
FREQUENCY
1k
2k
4k
41
34
27
-2
-2
-2
9
9
9
-29
-29
-29
3
3
3
0
1
1
22
16
9
Specific single figure noise level
8k
28
-2
9
-29
3
-1
8
31
Hz
dB
dB
dB
dB
dB
dB
dB
dB(A)
63
73
-13
7
-29
3
-26
15
125
72
-10
7
-29
3
-16
27
250
76
-6
8
-29
3
-9
43
500
63
-3
8
-29
3
-3
39
FREQUENCY
1k
2k
4k
66
61
54
-2
-2
-2
9
9
9
-29
-29
-29
3
3
3
0
1
1
47
43
36
Specific single figure noise level
8k
48
-2
9
-29
3
-1
28
50
Hz
dB
dB
dB
dB
dB
dB
dB
dB(A)
TOPVEX FR06 MVHR EXHAUST
Topvex Extract Fan SWL
Duct losses including end reflection
Directivity
SWL to SPL including 6m distance correction
Receiver façade correction
A-weighting correction
A-weighted SPL @ 1m from receiver façade
SUMMARY OF ABOVE CALCULATIONS
Combined specific noise level of plant
Correction for tonality
Rating Noise Level
Criterion (Section 2.2 above)
Noise Impact
56
0
56
23
33
dB(A)
dB(A)
dB(A)
dB(A)
dB(A)
4.5
It can be seen that the cumulative noise level of all plant when measured at a distance
of 1m from the nearest noise affected window will exceed the requirements of the local
authority and noise mitigation measures will therefore be necessary.
5.0
Noise Mitigation Measures
5.1
The condenser plant will need to be contained within a bespoke acoustic enclosure that
shall incorporate intake and exhaust air attenuation.
The enclosure shall typically be constructed from 50mm thick acoustic panel-work with
integral sound attenuating elements for the intake and exhast air paths that shall
provide the following minimum transmission/insertion loss:
5.2
50MM DEEP ACOUSTIC PANEL-WORK
Frequency
63
125
Transmission Loss
19
19
250
25
500
31
1k
40
2k
42
4k
45
8k
41
Hz
dB
SOUND ATTENUATING ELEMENTS
Frequency
63
125
Insertion Loss
9
15
250
25
500
45
1k
50
2k
50
4k
43
8k
32
Hz
dB
In-duct attenuation will be required for the basement plant in order to control noise to
atmosphere. The attenuators shall provide the following insertion loss values:
AERIS 100 IN-DUCT ATTENUATOR INSERTION LOSS
Frequency
63
125
250
F.A.I. - Primary
8
13
20
F.A.I. - Secondary
3
6
10
Exhaust - Primary
6
9
14
Exhaust - Secondary
8
12
21
660125-3
31/08/16
500
38
16
26
34
1k
50
27
34
50
2k
50
19
35
37
4k
35
12
25
24
8k
28
9
17
12
Hz
dB
dB
dB
dB
page 3 of 5
St James Hall – 97-103 Wilsham Street
Plant Noise Assessment Report
---------------------------------------------------------------------------------------------------------------------------TOPVEX FR06 IN-DUCT ATTENUATOR INSERTION LOSS
Frequency
63
125
250
500
Fresh Air Inlet
10
16
28
42
Exhaust
11
20
34
50
1k
50
50
2k
50
50
4k
48
50
8k
42
50
Hz
dB
dB
The inclusion of the above noise mitigation measures shall ensure that plant noise
emissions shall not exceed the requirements of the local authority, the Royal Borough
of Kensington & Chelsea.
6.0
Conclusion
6.1
A plant noise assessment has been undertaken for the proposed mechanical
equipment at 97-103 Wilsham Street, London, W11 4AU and it has been established
that noise mitigation measures will be required in order to meet the required noise
criteria at the nearest affected noise sensitive locations as set by the Royal Borough of
Kensington & Chelsea. Suitable acoustic treatment has been specified.
660125-3
31/08/16
page 4 of 5
St James Hall – 97-103 Wilsham Street
Plant Noise Assessment Report
----------------------------------------------------------------------------------------------------------------------------
Appendix 1 - Glossary of Terms
Decibel, dB
A unit of level derived from the logarithm of the ratio between the value of a quantity and
-5
2
a reference value. For sound pressure level (Lp) the reference quantity is 2x10 N/m .
-5
2
The sound pressure level existing when microphone measured pressure is 2x10 N/m
is 0 dB, the threshold of hearing.
L
Instantaneous value of Sound Pressure Level (Lp).
Frequency
Is related to sound pitch; frequency equals the ratio between velocity of sound and
wavelength.
A weighting
Arithmetic corrections applied to values of Lp according to frequency.
When
logarithmically summed for all frequencies, the resulting single "A weighted value"
becomes comparable with other such values from which a comparative loudness
judgement can be made, then, without knowledge of frequency content of the source.
Leq,T
Equivalent continuous level of sound pressure which, if it actually existed for the
integration time period T of the measurement, would possess the same energy as the
constantly varying values of Lp actually measured.
LAeq,T
Equivalent continuous level of A weighted sound pressure which, if it actually existed for
the integration time period, T, of the measurement would possess the same energy as
the constantly varying values of Lp actually measured.
Ln,T
Lp which was exceeded for n% of time, T.
LAn,T
Level in dBA which was exceeded for n% of time, T.
Lmax,T
The instantaneous maximum sound pressure level which occurred during time, T.
LAmax,T
The instantaneous maximum A weighted sound pressure level which occurred during
time, T.
Background Noise Level
The value of LA90,T, ref. BS4142:1997.
Traffic Noise Level
The value of LA10,T.
Specific Noise Level
The value of LAeq,T at the assessment position produced by the specific
noise source, ref. BS4142:1997.
Rating Level
The specific noise level, corrected to account for any characteristic
features of the noise, by adding a 5 dBA penalty for any tonal, impulsive
or irregular qualities, ref. BS4142:1997.
Specific Noise Source
The noise source under consideration when assessing the likelihood of
complaint.
Assessment Position
Unless otherwise noted, is a point at 1 m from the façade of the nearest
affected sensitive property.
660125-3
31/08/16
page 5 of 5
Appendix
St James Hall, London – Equipment Schedule
August 2016
12 GROSVENOR RISE
LONDON
E17 9LB
TEL: 0208 520 8862 / 07808 734 505
EMAIL: INFO@WERNINCK.CO.UK
ST JAMES HALL - EQUIPMENT SCHEDULE
No. Manufacturer
01
Recotherm
02
SystemAir
VENTILATION EQUIPMENT
Unit Type
No
Airflow
Aeris 100
1
1000 l/s
TOPVEX FR06
1
287 l/s
Location
Basement Level Plantroom
Basement Level Plantroom
AIR CONDITIONING EQUIPMENT
No. Manufacturer
Unit Type
No Heating / Cooling
Location
01
DAIKIN
FXSQ63A internal unit 1
8.0 / 7.1
Gym (Basement)
02
DAIKIN
RXYSCQ4 external
1
External Area (Acoustic
unit
Enclosure)
No. Manufacturer
01
Remeha
HEATING EQUIPMENT
Unit Type
No
Heating
Quinta Pro 65
2
65.0 kW
Werninck Building Services Limited
Location
Basement Level
Plantroom
Page 1 of 1
TOPVEX FR06-R-CAV
Document type: Product card
Document date: 2016-08-18
Item no. 27980
Generated by: Systemair Online Catalogue
Description
• Flat design
• Flexible installation
• Low energy use
- Energy efficient plug fans with EC motors
• Efficient rotating heat recovery wheel
- No need of water drainage
- Automatic summer operation
• Integrated/pre-programmed control system
- Efficient energy saving functions
- Built in week program with holiday schedule
• Constant airflow- or duct pressure control
• Large inspection doors for easy maintenance
- Slide doors as an accessorie
• Manufactured in Aluzinc plated sheet metal
- Corrosive class C4 (Industrial and coastal areas with moderate salinity).
- AZ185 sheet metal have more than 50 years of technical lifetime.
• Factory tested
Topvex FR03-11 is a series of efficient ventilation units designed for offices, shops, schools, daycare centres or similar premises. The units are
especially designed to meet the coming energy requirements and have therefore a very low energy use and high efficiency rotating heat exchangers.
To simplify the installation and commissioning the units are included with control system and pre-configured.
The unique design with double rotating heat exchangers makes the unit very flat. No need of condense water drainage makes the unit very flexible to
install. Topvex FR can be mounted flat on the floor, hanging upside down in a false ceiling or standing on the long side.
The units casing is made in double-skinned 1,0mm aluzinc sheet metal (AZ 185) with internal sound/thermal mineral wool insulation. Two large
inspection doors facilitate inspection and maintenance. The fans and the rotating heat exchangers are removable. Supply and extract air filters are
mounted in frames and to provide optimal sealing, fitted with ceiling stripes.
The separate electrical box facilitates services. All electrical connections are done at one place in the electrical box.
With the integrated control system it is possible to supervise/control the airflow, duct pressure, temperatures, heating/cooling recovering and the
ventilation systems operating time. Topvex FR has also other energy saving functions like free cooling, cool recovering, and season related
temperatures and airflow controlling.
Topvex FR is as standard equipped with the following communication possibilities:
Exoline and Modbus via RS-485.
Exoline, Modbus and built in WEB via TCP/IP.
BACnet/IP.
Cloud service via TCP/IP.
E-tool configuration tool.
E tool© is a PC-based configuration software with graphical user interface. The program gives you an excellent overview of the Corrigo E settings.
Using E tool© , all settings can be made on the computer and downloaded into the controller. An infinite number of configurations can be stored in
the computer memory for later use.
E tool© can be downloaded free of charge from: http://www.regincontrols.com/en-GB/category/configuration-software-for-corrigo/2910/#topcats
The functions and functionality in Topvex FR gives you all that are needed to create an indoor environment with the highest comfort and to the
lowest operating costs. Save the global environment by using Topvex FR.
Model code.
1
2
3
4
Topvex FR06-HWH-L-CAV
12-
FR:
Flat unit, Rotating heat exchanger.
06:
Nominal airflow 0.6 m3/s.
HWH: With Hot Water coil, High power.
HWL: With Hot Water coil, Low power.
EL:
With ELectrical heater.
Name: TOPVEX FR06­R­CAV
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TOPVEX FR06­R­CAV | Item no.: 27980
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Empty: Without heater. Example: Topvex FR06-L-CAV.
3-
L:
R:
4-
CAV:
Left version. Unit with supply air to the left, when viewed from the access and electrical box side.
Right version. Unit with supply air to the right, when viewed from the access and electrical box side.
Constant Air Volume control. VAV duct pressure control available as an accessory.
Technical parameters
ErP
ErP ready
ErP 2016/ErP 2018
Unit
Voltage
Frequency
Phase
Recommended fuse
Airflow range
Enclosure class
Weight
400
V
50
Hz
3
~
3 x 10
A
200-680
l/s
IP23
IP
256
kg
Heat exchanger
Exchanger type
Rotating heat exchanger
Heater
Heating type
None
Supply fan
Voltage
Phase
Input power (P1)
400
V
3
~
838
W
400
V
3
~
Extract fan
Voltage
Phase
Input power (P1)
838
W
Extract filter
Filter, supply air
F7
Supply filter
Filter, extract air
M5
Others
Mounting type
False ceiling units
Supply side
Right
Diagrams
Diagrams
Supply
Name: TOPVEX FR06­R­CAV
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Extract
2 / 5
Diagrams and calculations are made for the performance with clean filters.
Dimensions
Name: TOPVEX FR06­R­CAV
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Topvex
FR06
A
B
C
øD
E
F
G
H
I
J
*K
L
M
N
P
Q
R
S
T
U
W
X
Y
2160 1315 640 400 80 275 325 550 325 1345 705 1902 1260 414 103 106 102 375 695 158 653 763 384
* Height when using the Sliding door kit (accessory).
X+Y+X = The total length of the hatches.
1 Outdoor air
2 Supply air
3 Extract air
4 Exhaust air
Accessories
Electric accessories
CO2RT-R-D Transmitter (6993)
CO2RT Wall mounting 0-2000 ppm (13704)
CO2DT Duct Trans 0-2000 ppm (13765)
Presence detector/IR24-PC (7288)
Push button, impulse (9693)
TG-R5/PT1000 Room sensor 0-50° (5404)
F-T120 Timer frame (5137)
T 120 Timer (5165)
TG-UH/PT1000 Wall sensor (35203)
Systemair-E CO2 sensor (14904)
Systemair-E-D CO2 sensor (14905)
Systemair-1 CO2 duct sensor (14906)
Systemair-1M CO2 duct sensor (14908)
Touch panel S-ED-TOUCH (208998)
Room Controller S-ED-RU-DFO (27989)
E0R230K- Corrigo Remote Displ. (27413)
VAV Duct pressure control (124197)
Accessories
DXRE 60-35-3-2,5 Duct cooler (7956)
LDC-B 400-1200 Silencer baffle (9081)
EFD 400 Damper + NF24A motor (9859)
SDF 06 Sliding door kit-FR06 (111560)
CVVX 400 Combi grille, black (6236)
PGK 60-35-3-2,0 Duct cooler (6612)
LDC 400-900 Silencer (5198)
BFT FR06 F5 Filter (206777)
BFT FR06 F7 Filter (206778)
ASF 400/KB Flex. conn. (311990)
CTVX 400 Combi-roof hood Black (27242)
CTTG 400 Roof curb (27253)
Documentation
Topvex_FR03-11_Installation_instruction_129450_CE_GB (A001).pdf (4,46MB)
Topvex_FR03-11_Operating_and_maintenance_129451_(A001)_GB.pdf (4,02MB)
Wiring_chart_Topvex _SR_03-11_TR_03-15_SC_03-11_FR_03-11.pdf (1,08MB)
WD Topvex FR06 400V 3N~.pdf (249,96kB)
CertificationDiploma 2015_06 Systemair Topvex.pdf (1,78MB)
Commissioning_record_GB_206951_(A005).pdf (4,79MB)
E8093_Topvex_Specification_Data.pdf (8,20MB)
Corrigo_G3_inst_EN_SV_DE_FR.pdf (517,46kB)
Corrigo_3.4_BACnet_PICS.pdf (131,11kB)
Name: TOPVEX FR06­R­CAV
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Corrigo_ventilation_Communication_Guide_3.3_manu_EN.pdf (1,06MB)
Corrigo_ventilation_variables_for_EXOline_Modbus_and_BACnet_3.4_manu_EN.pdf (793,66kB)
Corrigo_ventilation_3.4_manu_EN.pdf (1,52MB)
Corrigo_ventilation_3.4_user_guide_EN.pdf (722,44kB)
Specification text
Name: TOPVEX FR06­R­CAV
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RECOTHERM
AERIS UNITS – Installation Manual
HOW THE UNIT WORKS
FRESH AIR VENTILATION
To understand how fresh air ventilation can work it may be useful to look at the properties of air.
The air around us has moisture content. That is, it contains so many grams of water for every kilogram of air. The amount of
water the air can hold is dependent on the temperature of that air.
It is important to
appreciate that the
term is relative
humidity,
MOISTURE CONTENT COMPARISON
SEASONS OF THE YEAR
Air at 0oC has a
maximum moisture
content of 3.8 g/kg. If it
contained that amount
of water it would be
said to be saturated i.e.
100% relative humidity.
Winter
Wet Day in April
Pool Hall Moisture
Content
Summer Day
Fresh Air Moisture
Content
0
. If the air
was heated from 0oc to
15oc the relative
humidity for the same moisture content would be 35% RH.
5
10
15
20
MOISTURE CONTENT g/kg
Graph A
So you can work out for yourselves that air at 0oc 100% RH would actually contain less moisture than air at 15 oc 50% RH.
The moisture content inside a pool hall is very much higher than the fresh air. To give you an example, a typical pool with an air
temperature of 30oc and relative humidity of 60% has a moisture content of 16.3 g/kg.
In the middle of the winter, on a cold day, the moisture content would be 3.8 g/kg. On those wet days in April the moisture
content would be 10.2 g/kg and on a summers day the moisture content is only 11 g/kg.
Referring to the Graph A, it can be seen that throughout the year the fresh air has lower moisture content than the air inside the
pool hall.
By introducing fresh air at any of these conditions it will lower the moisture content and thus the relative humidity within the
2
GRAPH SHOWING EFFECT OF SPEED ON POWER
3
POWER (KW)
2.5
2
1.5
1
0.5
0
0
20
40
60
FAN SPEED
80
100
120
Graph B
From this graph you can see the dramatic effect reducing the air volume can have on the power consumption of the motor. If we
reduce the air volume down to 50%, we would reduce the power consumption to only 12.5% of the maximum. To put that into
figures, a AERIS 100 unit would take 1.6 kW on maximum load this would be reduced to 0.2 kW if the unit were running at half
speed.
Recotherm utilizes EC technology on a swimming pool ventilation system because the air volume is calculated to cope with the
maximum dehumidification load but for the majority of the time the maximum dehumidification is not required. Hence we can
use a lower air volume.
To control the unit there are MICROPROCESSOR CONTROLS. Sensors mounted in the return air chamber send back to the
controller the temperature and humidity readings every five seconds. Using this information, the controller decides on the
amount of air and heat that is required along with how much recirculation that can be permitted. This gives precise control over
the internal conditions within the pool hall and ensures that the unit is not working any harder than it needs to thereby keeping
running cost to a minimum
So you can see, what Recotherm have done is to design a unit using conventional heat recovery techniques, combined with high
efficiency fans driven by frequency inverters and all controlled using the latest microprocessor technology.
What this gives you, the customer, is the most economical way of controlling the swimming pool environment without
compromising the quality of that environment.
3
INSTALLATION
SITING THE UNIT
There are eight different layouts for both the vertical and the horizontal units these are shown on pages 7 and 8 of this manual.
When ordering you should specify the model you require and which layout you need.
The resistance of the ductwork system should not exceed the maximum permissible figure shown on the technical schedule.
The exhaust air and fresh air louvers should be sited to ensure that as little air as possible is re-circulated. It may be necessary in
certain installations to fit a physical barrier between the two discharge louvers.
Careful consideration should be given to the supply air ductwork system to ensure that the distribution of the air does not suffer
when the volume is reduced. For the best results the air should be discharged as close as possible to the area where the
condensation is likely to form. In a well-insulated building this would normally be the glazed area. The return air would normally
be from a single point. It isn’t necessary to have an extensive return air ductwork system.
SOUND DATA
Although the units are inherently quiet
when on low load, you may require
some form of sound deadening,
particularly on the return air system,
which tends to be quite simple and
therefore more prone to noise. The
following table gives dB sound power
levels for each of the units.
63
125
250
200
1K
2K
4K
8K
AERIS 50
Supply fan
Return fan
77
67
83
73
71
62
69
63
65
60
61
54
58
50
51
43
AERIS 100
Supply fan
Return fan
66
64
69
67
75
69
75
69
75
65
70
61
68
62
61
54
AERIS 150
Supply fan
Return fan
75
72
75
74
79
76
77
74
71
68
68
65
66
64
65
62
AERIS 200
Supply fan
Return fan
72
70
82
79
80
77
76
74
72
69
71
68
65
62
62
59
-20
-20
-26
-31
-34
-37
-35
-62
Panel Transmission
loss
LPHW CONNECTIONS
The units heating coil needs to be connected into a L.P.H.W. boiler system, operating with a minimum flow temperature of 65c
flow and a return of 45c.
The units pipe connection sizes, heating coil duty; flow rate and hydraulic pressure drop are detailed in the chart below:
Model
AERIS 50
AERIS 100
AERIS 150
AERIS 200
F&R Pipe Size
22MM DIA. CU
28 MM DIA. CU
35 MM DIA. CU
35 MM DIA. CU.
Duty kW
15
31
46
62
Flow Rate L/s
0.187
0.374
0.561
0.747
Pressure Drop Kpa
12
15
20
17
The units are factory fitted with a three port fully modulating valve.
Always ensure the L.P.H.W. circulating pump has sufficient duty to circulate the required flow rate against the hydraulic head
necessary to overcome the resistance of the 3-way valve and heating coil.
It is recommended that isolating valves be fitted into the L.P.H.W. flow and return connections to the unit.
4
CONDENSATE DRAIN
The unit is fitted with a 22 mm diameter drain connection this should be trapped using a 50 mm blow through trap (Fig. 1, pg. 9)
before being run to waste.
ELECTRICAL CONNECTIONS
The electrical installation should comply fully with the current edition of the IEE regulations. (Fig. 2 & 3, pg. 9)
EARTHING
All ducting and other associated metal work including our unit must be bonded and solidly earthed (grounded) in accordance with
the current IEE regulations.
N.B. For EMC compliance this machine is fitted with RFI filtering and screened cable’s which will have inherent earth leakage
characteristics. Because of this leakage, a standard type RCD installed in the supply line would be subject to nuisance tripping and
also the leakage would have a DC component, which might affect the proper operation of the RCD.
Should an RCD be essential due to inadequate earthing facilities on a particular site, then seek advice from the RCD manufacturer
having first made them aware of the above points. The inverter manufacture recommends that only an industrial level RCD that
has a rating of 100 mA is used.
Nomenclature
EMC = Electro Magnetic Compatibility
RFI = Radio Frequency Interference
RCD = Residual Current Device
DC = Direct Current
POOL COVER SET BACK
The unit is supplied with a set back facility that can be linked to the operation of the pool cover. When the pool cover is on the
unit will reset the pool hall temperature to a lower level and switch off the supply fan if the set point conditions are achieved. The
exhaust fan will run at 20% of it full speed to maintain a negative pressure in the pool hall and to monitor the internal
environment. At this speed the power consumption is only 0.8% of the full speed power, for the VF 50 this would mean a power
consumption of 6.8 W. Should the conditions deviate from the set points the controls will automatically restart the unit and run
until the conditions have stabilized.
How to set up the pool cover setback
When the unit is supplied the pool cover set back facility is linked out on the terminal block. You should remove the link and
connect your volt free signal across the terminals.
The signal should be set up so that the switch is “closed” whenever the pool cover is off. Check the indication on the control panel
to ensure that you have the switch working the right way round.
44
48
5
POOL WATER HEATING
The units have the facility to control the pool water temperature. The pool water temperature can then be read from the units
display panel and adjusted in the same way as the air temperature.
To achieve this the contractor must install a three-port valve in the LPHW flow and return serving the pool water heat exchanger.
(see diagram below ) A 24-volt actuator that takes 0-10 volt control signal would operate this valve.
Recotherm will provide the sensor. This sensor should be installed into the pool water pipework just prior to the heat exchanger
and wired back to the panel on the unit via a 2-core screed cable. This should be wired directly into the controller on terminals 8
and 9. The actuator on the valve will be served from the Recotherm panel by a three core cable these should be wired to terminal
17 (red) 19 (black) and B8 (white).
6
7
8
9
TECHNICAL DETAILS OF VF SWIMMING POOL VENTILATION UNITS
MODEL
Nominal air volume
AERIS 50
AERIS100
AERIS 150
AERIS 200
m3/s
0.5
1.0
1.5
2.0
Maximum
1)
kg/h
27
54
81
108
Dehumidification
2)
kg/h
10
20
30
40
effect kg/hr
3)
kg/h
24
47
71
94
Supply fan motor
kW
1.25
1.25
1.85
2.4
Sound power level
dBA
84
77
83
85
External resistance
Pa
100
100
100
100
Specific fan power
w/l/s
0.9
0.85
.83
0.68
Maximum external resistance
Pa
300
300
300
300
Return fan motor
kW
1.25
1.25
1.85
2.4
Sound power level
dBA
76
74
81
83
External resistance
Pa
100
100
100
100
Specific fan power
w/l/s
0.6
0.6
0.68
0.54
Maximum external resistance
Pa
300
300
300
300
Recuperator nominal Eff
%
70
73.4
73.5
70.4
LT.LPHW Coil duty
kW
15
31
46
62
LT.LPHW flow rate
l/s
0.19
0.374
0.561
0.747
LT.LPHW pressure drop
kPa
12
15
20
17
Max fabric loss capacity
kW
11
21.5
30.8
42.5
Power consumption
kW
0.74
1.6
2.3
2.5
Nominal power consumption
kW
0.23
0.38
0.54
0.63
Full load current (single phase)
Amps
3.6
7.5
N/A
N/A
Full load current (three phase)
Amps
N/A
N/A
3.75
3.7
Length
mm
1000
1150
1190
1500
Width
mm
750
850
1150
1500
Height
mm
1900
2100
2300
2400
Weight
kg
370
450
550
750
Duct connection sizes (H x L)
Fresh air inlet
mm
410 x 650
510 x 650
510 x 900
650 x 1200
Supply air outlet
mm
300 x 550
300 x 650
300 x 900
400 x 1200
Return air inlet
mm
500 x 500
500 x 500
900 x 900
900 x 900
Exhaust air outlet
mm
200 x 550
220 x 650
300 x 900
300 x 1200
1) Winter fresh air at 0oc 100% RH Pool condition 30oc 60% RH
2) Summer fresh air at 28oc 47% RH Pool hall condition 30oc 60% RH
3) Average fresh air at 8oc 80% RH Pool hall condition 30oc 60% RH
10
Recotherm
High efficiency, more eco-friendly swimming pool
ventilation systems
Recotherm Limited
Unit A, Astwood Business Park . Astwood Lane . Astwood Bank .
Redditch . Worcestershire . B96 6HH
T: 01527 894533
F: 01527 893212
Email: sales@recotherm.co.uk
Webpage: www.recotherm.co.uk
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