Energy Recovery

Energy Recovery
Energy recovery system for
ROOFTOP ACTIVA 045/090
Options and accessories, Installation manual
Ref.: N-40337 1209
Index
Index
1
Energy recovery system for Roof Top ACTIVA 045/090......................................................... 1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.8.1
1.9
1.10
1.11
General Description............................................................................................................... 2
General measurements.......................................................................................................... 3
Operations.............................................................................................................................. 3
Assembly................................................................................................................................ 4
Installation.............................................................................................................................. 4
Electrical connections............................................................................................................ 6
Air flow adjustment................................................................................................................. 6
Maintenance........................................................................................................................... 7
Enthalpy wheel....................................................................................................................... 8
Electrical specifications.......................................................................................................... 8
Wiring diagram....................................................................................................................... 9
EC Declaration of Conformity............................................................................................... 10
i
Index
ii
1
Energy recovery system for Roof Top AC‐
TIVA 045/090
1
1.1
Energy recovery system for Roof Top ACTIVA 045/090
General Description
1.1 General Description
The energy recovery system is used directly coupled to the side of the Rooftop Activa units and includes
the Economiser and indoor air quality sensor options.
Features:
• Rotating sectorised enthalpy wheel recovery system,
• centrifuge fan, pulley and belt transmission on the air intake and air extraction sides,
• rain protection (Rainhood) with drip filters on the air intake,
• barometric damper on the air extraction,
• air filters G4 as standard on both sides of the enthalpy wheel. F6 and F7 optional,
• height-adjustable support legs,
• all cabinet panels are fitted with heat insulation on the inside.
The enthalpy wheel provides substantial savings by reducing the demand for energy. It is ideal for areas
with high or low temperatures and areas with a high level of humidity. Also for areas with a very low level
of humidity, in buildings with a humidifying system, as the humidity is recovered from the extraction air
and re-introduced into the building.
Air leakage and bleed sector
Many rotating recovery systems are fitted with a bleed sector when this is often not necessary. The bleed
sector minimises leaks between the extraction air flow to that of the intake air flow by diverting a portion
of the latter to the extraction flow through the separator between the two.
This is only necessary in cases of industrial applications where the extraction air carries contaminants.
As a result, the air volume to be moved is 15-20% higher to ensure the required renewal flow, with the
subsequent increase in power required in the fan motor.
In residential air conditioning, the renewal air maintains an acceptable air quality and there are no con‐
centrated contaminants to be taken into account.
The extraction air leakage to that of the the intake air in this energy recovery system is at a value of less
than 5%. The resulting cost of moving this volume of air is much lower than in the case of a bleed sector.
Do not use this energy recovery system in industrial applications with concentrated contaminants.
2
Energy recovery system for Roof Top ACTIVA 045/090
General measurements
1
1.2
1.2 General measurements
1. Extraction side filter access
A.
See table
2. Intake side filter access
B.
See table
3. Extraction
C.
900 mm clearance
4. Intake
D.
1525 mm clearance
Model
A
B
045/060
1365
1324
075/090
1522
1456
Weight
1.3 Operations
The enthalpy wheel is centred between the outdoor intake air flow and the exhaust air flow. It is the only
truly self-cleaning system, as during rotation the air flow moves in opposite directions over each half of
the wheel surface.
When the rotation movement at 60 r.p.m., the wheel surface absorbs the sensible and latent energy from
the side with the highest temperature and transfers it to the side with the lowest temperature, thus making
the exchange of air flow between both sides. During a summer cycle, the rotation of the wheel transfers
heat and outdoor air humidity (renewal) to the extraction air.
During a winter cycle, the process is the opposite, transferring heat and extraction air humidity to the
renewal air.
Where there is no kind of demand (air conditioning or ventilation) and the air quality is correct, the unit
is at a standstill.
3
1
1.4
Energy recovery system for Roof Top ACTIVA 045/090
Assembly
If continuous ventilation mode is selected and the air renewal selected is less than 30%, only the indoor
fan will run. If air renewal of over 30% is selected, the three fans (indoor, extraction and renewal) will run
and the enthalpy wheel will turn. When the air quality is incorrect, air renewal will be 100%.
When there is a demand for cold (outdoor air not favourable) or a demand for heat and the air quality is
correct, the compressors or heat support and the indoor fan will start up. If air renewal of over 30% is
selected, the exhaust and renewal fans and the enthalpy wheel will also run. When the air quality is
incorrect, air renewal will be 100%.
During operations in economiser mode (Free cooling), the enthalpy wheel will stop turning and there will
be no exchange, the fans continuing to run to maintain the flow of renewal and extraction air. If the outdoor
air intake is insufficient to meet the demand, a compressor will start.
1.4 Assembly
The Rooftop unit must be installed on a Roofcurb
mounting base or similar.
The energy recovery system is fitted with lugs for
hoisting and handling during the fitting process. To do
so:
1 Loosen the screw slightly.
2 Turn the lug to the correct position.
3 Tighten the screw.
1.5 Installation
Installation process
(First make sure the Economiser and air quality sen‐
sor options are installed in the Rooftop unit)
1. Disconnect the power supply to the Rooftop unit.
2. Remove the return and outdoor air side panels.
3. Remove the return air cover on the base.
4
Energy recovery system for Roof Top ACTIVA 045/090
Installation
1
1.5
4. Place the support rail in position, aligning the
mounting holes with the panel securing holes.
5. Place the return and outdoor air panels (with open‐
ing, supplied with the recovery system assembly) in
their housing on the side of the Rooftop. Secure using
the existing front closures to the posts and edge.
6. Secure both panels and, in turn, the supporting rail,
using the screws in the holes in the original panels of
the Rooftop.
7. Apply a 25 x 25 rubber strip in the area indicated –
A– between the panels and the supporting rail.
8. Using the handling lugs, slightly lift the recovery
system assembly and release the telescopic legs until
they are flat on the ground. Replace the screws but
do not tighten.
9. Fit 20 x 5 rubber strip on the recovery system roof
mooring tab to the side panels of the Rooftop –B–.
10. Lift the recovery system assembly and rest it on
the supporting rail, facing away from the side panels
of the Rooftop.
11. Adjust the legs to the required height and tighten
the screws. A treated piece of wood measuring ap‐
prox. 50 mm thick x 350 x 350 should be placed below
each leg to avoid damaging the roof of the building.
12. Secure the upper panel of the recovery system to
the side panels of the Rooftop using screws and a
sealed washer.
13. Place the seals on both sides of the recovery sys‐
tem and secure using self-threading screws to the
edges of the recovery system and to the panels of the
Rooftop.
14. Using a continuous line of silicone, seal the area
where the upper panel and the side seals of the re‐
covery system touch the panels of the Rooftop.
15. Install the rain protection assembly (supplied dis‐
mantled in separate packaging) on the air intake ac‐
cording to the instructions included with its packaging.
Apply a continuous line of silicone to the area where
the upper panel of the protector touches the side pan‐
el of the recovery system.
B.Silicone.
C. Seals, on both sides.
D. Supporting legs.
E. Silicone.
5
1
1.6
Energy recovery system for Roof Top ACTIVA 045/090
Electrical connections
1.6 Electrical connections
1 The national regulations established must be followed in all cases.
2 The power supply to the energy recovery system must be independent to the general power supply
to the unit and must be fitted with its own circuit breaker (not supplied).
3 Fit the thermal magnetic and residual current circuit breaker in the installation according to the in‐
structions of the electrical specifications table and the wiring diagram.
4 Remove the side access panel to the renewal fan to access the electric box. Remove the protective
cover and connect the power cable to terminal strip X1.
5 Connect the telephone cable from connector J2 or J3 on board A13 to connector J15 on economiser
board A4, which is on the economiser side of the Rooftop .
6 Recovery system control board configuration. Once the accessory has been fitted, reconnect the
power to the Rooftop and the accessory. Check that the green LED (V2) on the control board (A13)
remains lit. To search for and configure accessories, press the test button on the YKN2 Open control
board (A1) located in the electric box of the Rooftop until the red LED switches on. When the search
and configuration process starts, the red LED on the board will light up and will remain on until the
operation is completed. Once switched off, check that the green LED (V2) on the recovery system
board is flashing to indicate that the accessory has been configured.
7 There is a potentiometer, P1, on the economiser board (A4) that allows for the damper to be modu‐
lated by hand. If the position is over 30%, the three fans (indoor, extraction and renewal) will run and
the enthalpy wheel will turn. The economiser dampers and the motors will return to their operating
position after 30 sec.
CAUTION
Loose connection terminals produce overheating of cables and terminals. The unit is working incor‐
rectly and there is a risk of fire.
1.7 Air flow adjustment
The intake flow (renewal) and extraction air flow must
be the same value, according to that required in the
installation.
Follow the process below to adjust and balance them:
1. Start the Rooftop and the recovery system.
2. Open the outside air damper of the Rooftop fully.
3. Remove the 2 plugs -A- at the top of the panels on
the intake air side of the recovery system. These are
located before and after the enthalpy wheel.
4. Using a differential manometer, measure the pres‐
sure drop between both points.
5. In the graph, entering with the value of this drop in
pressure, obtain the value of the air flow.
6. Where the flow is to be increased or decreased,
adjust the motor pulley to the open turns required ac‐
cording to the fan features table (Table 1). Check the
tightness of the belt.
6
Energy recovery system for Roof Top ACTIVA 045/090
Maintenance
1
1.8
7. Once the flow is correctly adjusted, remove the
manometer and refit the plugs in the 2 holes -A-.
8. Repeat the process to adjust the flow on the ex‐
haust air side of the recovery system. In this case,
take the pressure reading on the holes located at the
bottom of panels -B-.
1.8 Maintenance
See General measurements , see on page 3 for measurements, accesses and minimum clearances.
Check the condition of the air filters on the air intake and extraction sides once a month.
SIZES AND QUANTITY OF G4 (STANDARD) AND F6 / F7 (OPTIONAL) FILTERS
Model
Dimensions
Quantity
045/060 G4 Filters (Standard)
48x330x554
8
075/090 G4 Filters (Standard)
48x365x620
8
045/060 F6/F7 Filters (Optional)
97x330x554
8
075/090 F6/F7 Filters (Optional)
97x365x620
8
Check the condition of the aluminium drip protection filters inside the rain protector once a month. Wash
with water and a mild detergent if required.
The motors require no maintenance.
Check the condition and tightness of the belts every two months.
7
1
1.9
Energy recovery system for Roof Top ACTIVA 045/090
Electrical specifications
1.8.1 Enthalpy wheel
An annual inspection of the enthalpy wheel is recom‐
mended.
To do so, disconnect the power supply and open the
access panels on the intake air side.
The wheel surface is divided into eight segments.
1 Wheel frame.
2 Segment fixture.
3 Segment retainer.
4 Segment.
5 Separator.
Where cleaning is required, remove the segments ac‐
cording to the Figure and wash with water and a mild
detergent.
CAUTION
Disconnect the power supply.
To remove the segments:
1 Remove the first segment.
2 Turn the wheel slowly 180º by hand and remove
the second.
3 Turn 90º and remove the third.
4 Turn 180º and remove the fourth.
5 Continue with the sequence until the eight seg‐
ments have been removed.
Use the same method to refit the segments.
1.9 Electrical specifications
(1)
Minimum cable
cross-section
(A)
(K Curve)
(mm2)
2,4
6
10
2,5
400.3.50
4,6
11,6
16
2,5
075/090
400.3.50
6,2
14,6
20
4
075/090
400.3.50
8,2
19,2
25
4
Model
Power supply
Standard rating
Rated current
(Units)
(V.ph.Hz).
(kW)
045/060
400.3.50
045/060
(1)
K Curve (DIN, VDE 0660-104).
(2)
Based on copper conductors, 105ºC.
8
Circuit breaker
(2)
Energy recovery system for Roof Top ACTIVA 045/090
1
Wiring diagram 1.10
1.10 Wiring diagram
•
NOTE
The components for on-site installation are not
supplied by the manufacturer
A
On-site installation
B
Cross-section B [mm2]
C
Electronic board
D
J3
E
J2
Accessories
F
M.
Exhaust fan
G
M.
Renewal fan
H
M.
Wheel fan
Cross-section B [mm2] F11 [A] REG.
Model
Q2 [A]
F12 [A] REG
F13 [A] REG
045/060
10
5 x 2.5
3
3
1,4
045/060
16
5 x 2.5
5,6
5,6
1,4
075/090
20
5x4
7,3
7,3
1,4
075/090
25
5x4
9
9
1,4
9
1
Energy recovery system for Roof Top ACTIVA 045/090
1.11 EC Declaration of Conformity
1.11 EC Declaration of Conformity
10
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