Assembly and maintenance instructions
EQGA and EQGB, Hygienic Version
Code suffix i = 3 and 4
Hygienic version.................................. Page 2
Delivery............................................. Page 2
Safety precautions.............................. Page 2
Mounting on the floor........................... Page 3
Suspending from the ceiling.................. Page 4
To install the drainage water trough........ Page 5
To clean the casing.............................. Page 5
To clean the finned-tube coils................. Page 5
To clean the fan.................................. Page 5
To clean the rotary heat exchanger......... Page 5
To clean the plate heat exchanger.......... Page 6
To disinfect the air handling unit............. Page 6
Fläkt Woods
8946 GB 2010.05
1
We reserve the right to alter specifications.
Assembly and maintenance instructions
EQGA and EQGB, Hygienic Version
Code suffix i = 3 and 4
Hygienic version
Recommendations for the selection of functions that
meet requirements on hygiene, among others VDI
6022, are presented in the ACON product selection
program for sizing and configuring a hygienic air
handling unit.
Thermal insulation to class T3
Condensation insulation to class TB3
Hygienically approved
non-metallic components
Internal docking
Stainless or
pre-painted casing
Window for
easy inspection
Casing to leakage
class L2
F7 bag filters, HEPA or
Carbon filters
Integrated or
fully sealed fan beams
without sharp edges
Components which
are simple to clean,
for example coils, rotary
heat exchangers and
plate heat exchangers
Large inspection
spaces
Provision for coil with
withdrawable drip tray
Delivery
Safety precautions
The hygienic air handling unit is delivered in accordance with one of the following alternatives:
•
•
•
Lifting and transport of air handling units, mounting
them on a base frame and fitting them with support
feet, the docking of blocks, safety precautions and
inspection prior to commissioning are specified in the
General instructions, Safety Precautions, 8658 GB.
As one delivery unit, i.e. one factory-assembled block unit.
As one delivery unit, i.e. one factory-assembled unit mounted on a base frame.
Several block units, which must be connected
to form one unit on site.
Fläkt Woods
8946 GB 2010.05
Floor without grooves
and block joints
2
We reserve the right to alter specifications.
Assembly and maintenance instructions
EQGA and EQGB, Hygienic Version
EUGA Fig 8
Code suffix i = 3 and 4
Mounting on the floor
The floor on which the unit is placed must be flat, to
ensure problem-free operation. Check the floor carefully
to avoid distortion of the unit and thus ensure that the
doors will not be difficult to open and close. EQAZ-05
adjustable feet are available to allow for individual
height adjustment of the EQAZ-04 base frame. Place the
support washer (supplied) under the foot as shown in
Figure 8. It is important to make sure that the unit is level.
If the air handling unit includes unit sections that are
provided with drains, space must be available for a water
trap (such as the EQAZ-08) as shown in Fig. 9.
Adjustment of the lateral and longitudinal position of the
air handling unit is best carried out by means of a roller
crowbar or the like, as shown in Figures 10 and 11.
Free space for water trap
= min. 150 mm
Fig. 9
Block unit without base frame
N.B! The air handling unit should slope 2 % towards
the inspection side to allow for drainage during cleaning. Flushing water can be collected in EQWZ-02 drainage water trough (accessory).
Fig. 10
EQWZ-02
Block unit on EQAZ-04 base frame
2%
15 mm
gap in
the end of
the base
frame
Fig. 7
Mounting on adjustable feet
Mount the feet spacing them evenly along the side
beams if more than 4 feet are to be fitted. If 4 feet are
used, fit one foot at each end of the side beams.
Fig. 11
To adjust the adjusting screw:
1) Back off the
locking nut (A).
2) Adjust the
height with
set screw (B).
3) Lock the
locking nut (A).
Fig. 8
Fläkt Woods
8946 GB 2010.05
3
We reserve the right to alter specifications.
Assembly and maintenance instructions
EQGA and EQGB, Hygienic Version
Code suffix i = 3 and 4
Suspension from the ceiling
Place the unit on a stand made on site as shown in the
examples below. Suspend the unit from hangers.
The larger units must be fitted with EQAZ-29 floor
grating so that service personnel can enter the air
handling unit.
The stand must also be constructed so that the
bottom panels are supported by either traversing or
longitudinal support beams.
Hanger
Important!
The position of the hangers can be easily
adjusted with the stand according to the
figure.
A
Hanger
Retaining flange A – max. 35 mm along the inspection side on unit sizes 005-090.
Cut and remove the edge of the flange ”A” at the
hinge locations on unit sizes 005-090.
Retaining flange A – max. 75 mm along the inspection side on unit sizes 081-216.
min. 800
N.B!
If the unit is fitted with a EQWZ-02 water
drainage trough, the edge of the flange
(A) should only be by the corner frame
members of the casing.
max. 1,5 m
Clamp
Heavy-duty installation
Heavy-duty installation
Suitable installation for unit sizes 005-216
Example 1
Suitable installation for unit sizes 005-216
Example 2
Hanger
View A
View B
View A
View B
2%
2%
cc max 600
cc max 600
cc max 600
cc max 600
N.B!
The tensile strength verification must
be issued by an authorized HVAC
installation engineer.
Fläkt Woods
8946 GB 2010.05
4
We reserve the right to alter specifications.
Assembly and maintenance instructions
EQGA and EQGB, Hygienic Version
Code suffix i = 3 and 4
To install the drainage water trough,
EQWZ-02
1. Make sure that no sensitive equipment, either inside
or outside the unit, can be harmed by the water.
Be extra careful not to damage the filter. If the unit has
an empty section (EQTC), use the special drip plate to protect the rest of the unit.
2. Clean the coil with a high-pressure cleaner. If the coil
is deeper than six tubes, a THD Power Clean is needed
to ensure a full cleanability.
3. Point the nozzle at a 45-degree angle to have a free passage for the water jet through the coil. Make sure
that the water penetrates the coil.
4. Remove all dirt.
5. Dry all surrounding parts in the unit.
The drain water trough is supplied as a loose part and
should be fitted after the air handling unit has been
docked. Place the drain water trough onto the mounting angle bracket and fasten it with the screws supplied (see illustration).
To clean the casing
Cleaning the fan
Carry out the following before cleaning the interior of
the casing:
1.Open the inspection panel if the centrifugal fan section has one.
2.Vacuum-clean the fan to remove dry dust.
3.Apply suitable dirt and degreasing agent such as cold degreasing agent on the fan blades, motor (degree of protection IP54) and other surfaces.
4. Flush with clean water after a few minutes. N.B! Do not use a high-pressure spray gun.
5. If the fan casing is equipped with a means for drain-
age, the water will run out on the floor of the unit
casing and be collected in the drainage water trough.
Otherwise, wipe the interior of the fan casing dry with a cloth.
• Remove the filters
• Remove the withdrawable filter frame
• Remove the withdrawable sound attenuating baffles
• Remove the withdrawable droplet separators
• Remove anti-skid devices, if fitted
• Remove withdrawable drip trays
Cleaning
1.Vacuum-clean surfaces to remove loose dust.
2.Apply suitable dirt and degreasing agent such as cold degreasing agent on interior surfaces.
3.Flush the surfaces clean with clean water after a few minutes. N.B! Do not use a high-pressure spray gun.
The flushing water is collected in the drain water
trough which can be connected to a drain or a collection vessel.
To clean the fans
1.Vacuum-clean the surface of the rotor to remove dry dust.
2. Apply suitable dirt and degreasing agent such as cold degreasing agent onto the rotor surface and other sur-
faces.
3. Flush after a few minutes with a high-pressure spray gun. Aim the jet of water at right angles towards the rotor structure. The spray nozzle should appropri-
ately be held approx. 50 mm away from the face surface of the rotor. Suitable pressure: up to 80 bar.
4. Vacuum-clean to remove water or blow surfaces clean with compressed air.
Cleanable coils for hygiene applications
All coils with hygiene fins are fully cleanable according
to the standards VDI3803 and VDI6022. This means
that the coil can be cleaned with a high-pressure water
system right through the core. The cleaning nozzle
used for coils with a fin pitch of 2.0-2.5 mm and deeper
than six tubes is THD Power Clean manufactured by
TECHNISCHER HYGIENE DIENST GMBH (E-mail:
[email protected], web: www.thd.info). If the coil is six
tubes deep or less, an ordinary nozzle can be used.
Fläkt Woods
8946 GB 2010.05
Important!
Do not use methyl ethyl ketone, aceton
or corrosive liquids.
5
We reserve the right to alter specifications.
Assembly and maintenance instructions
EQGA and EQGB, Hygienic Version
Code suffix i = 3 and 4
To clean the plate heat exchanger
Disinfection
1. Vacuum-clean the surface of the rotor to remove dry dust.
2.Apply suitable dirt and degreasing agent such as cold degreasing agent onto the heat exchanger surfaces.
3. Flush after a few minutes with a high-pressure spray gun.
The spray nozzle should be held 3-5 cm from the face surface. Suitable pressure: up to 80 bar.
EQRZ-01 flushing water tray is an accessory for collecting flushing water on the supply air side.
4.Vacuum-clean to remove water or blow surfaces clean with compressed air.
5.Clean the flushing water tray and drip tray.
6.Clean the droplet separator, if fitted.
Apply the cleaning agent on all the surfaces inside the
air handling unit
If disinfection is required, for example, in hospital
environments, after finishing the cleaning procedure
described the above, the surfaces can be treated e.g.
with any of the following agents:
• 5 % chlorinated solution
• 6 % hydrogen dioxide solution
• Hydrogen dioxide mist
• 10 -15 % isopropyl alcohol
• Hydrogen peroxide
Warning!
Wear protective gloves and protective
face mask.
See the protection and safety instructions
for the relevant cleaning agent.
Warning!
If a nozzle of a size delivering 2 litres/min
at 7 bar is used, the supply pressure to the
spray gun must not exceed 25 bar since the
nozzle is inclined at an angle of 20 º to the
face surface, and if the pressure is higher,
the face surface may be deformed.
Supply air at the bottom
Extract air
Supply air
The droplet separator,
if fitted, can be removed
by lifting and folding it.
Drip tray for collecting
condensate and
flushing water
Flushing water tray
EQRZ-01
Supply air uppermost
Supply air
Extract air
Flushing water tray
EQRZ-01
Drip tray for collecting
condensate and
flushing water
Make sure that the damper blades are open when you flush them clean
Fläkt Woods
8946 GB 2010.05
6
We reserve the right to alter specifications.