Exhausto DEX3000 EXcon Instruction Manual

DEX3000 EXcon
Assembly and installation
Original instructions
3006475-2022-12-16
EXHAUSTO A/S
Odensevej 76
5550 Langeskov, Denmark
Tel.: [phone]
Fax: [phone]
[email protected]
www.exhausto.dk

Symbols, terms and warnings
Symbols, terms and warnings...............................................................................................................3
1. Product information
1.1. Product use............................................................................................................................................. 5
1.2. Location in room.....................................................................................................................................6
1.2.1. Optimum location ........................................................................................................................... 6
1.2.2. Space requirements .......................................................................................................................7
1.3. Designations used in these instructions..............................................................................................8
1.3.1. Simplified diagram.......................................................................................................................... 8
1.4. Description............................................................................................................................................ 10
1.4.1. DEX unit construction................................................................................................................... 10
1.4.2. DEX unit, parts and materials........................................................................................................11
1.5. Principal dimensions............................................................................................................................12
1.5.1. Ceiling mounting - visible ............................................................................................................. 12
1.5.2. Partly integrated ceiling mounting ................................................................................................15
2. Assembly
2.1. Ceiling-mounted or semi-integrated assembly..................................................................................18
2.1.1. Ceiling and installation requirements............................................................................................ 18
2.1.2. Step by step assembly ................................................................................................................19
2.1.3. Requirements for partially integrated fitting.................................................................................. 20
2.2. Connection of condensation outlet.................................................................................................... 20
2.2.1. Condensation outlet guide channels (if condensation pump is mounted).....................................20
2.3. Connection of water heating coil HW (option)...................................................................................20
2.3.1. Connecting the water.................................................................................................................... 20
3. Electrical installation
Reference to DEX3000 Electrical Installation Guide......................................................................... 21
4. Technical data
4.1. Weight, corrosion class, temperature ranges, etc.............................................................................22
4.2. Condensate pump................................................................................................................................ 22
4.3. Compact filters......................................................................................................................................23
4.4. Air volume calculation......................................................................................................................... 23
4.4.1. Air volume calculation................................................................................................................... 23
5. Maintenance and servicing
5.1. Maintenance.......................................................................................................................................... 24
5.1.1. VDI 6022....................................................................................................................................... 24
5.1.2. Maintenance intervals................................................................................................................... 25
5.2. Removing and cleaning the counterflow heat exchangers and heating coils................................26
5.2.1. Removing and cleaning the counterflow heat exchangers and heating coils.............................. 26
5.3. Opening of partly integrated inspection hatch.................................................................................. 32
3006475-2022-12-16
2/36

Symbols, terms and warnings
Symbols, terms and warnings
Prohibition symbol Failure to observe instructions marked with a prohibition symbol may result in
serious or fatal injury.
Danger symbol Failure to observe instructions marked with a danger symbol may result in per-
sonal injury and/or damage to the unit.
Scope of the in-
struction manual These instructions apply to EXHAUSTO DEX series air handling units. For non-factory accessories, re-
fer to the separate instructions for the product.
The instruction manual must be fully observed to ensure personal safety and the safety of others, and
to protect equipment and ensure the correct operation of the DEX unit. EXHAUSTO A/S accepts no
liability for accidents caused by a failure to use the product in accordance with the manual’s instruc-
tions and specifications.
Important! Always check whether the latest version of the publication is available by searching for the order num-
ber on the EXHAUSTO website under Downloads
Prohibited uses The DEX unit is not to be used to transport solid particles or in areas where there
is a risk of explosive gases.
Startup The unit must not be started up until it is fully mounted with door and duct con-
nections.
Opening the air
handling unit
Do not open the service door until power has been disconnected and the fans
have stopped.
Duct termination in
wall
RD13175-01
Mount a permanent protective mesh to the exhaust and outdoor air connection,
using a mesh size of max. 20 mm. For example, use the EXHAUSTO outer wall
grilles.
Information plate The DEX unit information plate shows:
● Which DEX variant the unit is
● Unit production order no.
● Unit supply voltage
● The unit’s after-heating/cooling coil
3006475-2022-12-16 Symbols, terms and warnings
3/36

NB: Always have the production number ready when contacting EXHAUSTO about the product.
Location of identifi-
cation plate
The type plate is located between the extract air filter and the control system panel.
3006475-2022-12-16 Symbols, terms and warnings
4/36

1. Product information
1.1 Product use
Comfort ventilation EXHAUSTO's DEX3000 unit is used for comfort ventilation in frost-free single-room locations.
The DEX unit is designed for ceiling mounting and must be used as such.
Temperature range for use of the unit – see section “Technical data”.
Terms used in the
manual
This instruction manual uses the following terminology:
● Supply air (inlet aur)
● Extract air
● Outdoor air
● Exhaust air
3006475-2022-12-16 Product information
5/36

1.2 Location in room
1.2.1 Optimum location
As far as possible the unit should be located in the middle of the wall.
Avoid placing the DEX3000 units on the long side of narrow rooms.
RD14283-01
3006475-2022-12-16 Product information
6/36

1.2.2 Space requirements
Space requirements
and minimum clear-
ance
The sketch shows how much space is required under the unit for opening the door and servicing.
The dimensions at the sides of the unit indicate the minimum clearance for optimum servicing conditions.
RD14284-01
2400Min
500Min 500Min
3006475-2022-12-16 Product information
7/36

1.3 Designations used in these instructions
1.3.1 Simplified diagram
With integral water
heating coil, HW
(top view)
With integral elec-
tric heating coil, HE
(top view)
3006475-2022-12-16 Product information
8/36

Component Function Standard/accessory
HE1/HE2 Electric heating coil Accessories
HW Water heating coil Accessories
M1 Extract/exhaust air motor Standard
M2 Outdoor/supply air motor Standard
BP1 Bypass motor Standard
TE11 Temperature sensor, extract air Standard
TE12 Temperature sensor, exhaust air Standard
TE21 Temperature sensor, outdoor air Standard
TE22 Temperature sensor, supply air Standard
LSR Outdoor air closing damper with spring return Accessories
(Standard for HW)
Automatic overpressure damper for horizontal exhaust Standard
LS (A) Closing damper for vertical exhaust Accessories
TSA75 Overheating protection, electric heating coil (automatic reset) Accessories
TSA120 Overheating protection, electric heating coil (manual reset on
HMI/web server)
Accessories
PIRB Motion sensor, integral Accessories
CO2CO2-sensor, built-in Accessories
SM Smoke detector Accessories
3006475-2022-12-16 Product information
9/36

1.4 Description
1.4.1 DEX unit construction
The drawing below shows an overview of the DEX unit construction. Details for HW and HE are seen from
below:
HEHW
RD14290-02
5 6 7 8 10
11
1213 141517
1
2
3
4
9
16
3006475-2022-12-16 Product information
10/36

Pos. Part Function
1 Water valve
2 Motor for water valve
3 Bleeder valve Bleeding of water system
4 HE Control system for electric heating coil
5 Ceiling bracket Bracket for ceiling mounting
6 Outdoor air filter Filters outdoor air
7 Fan unit For outdoor air/supply air
8 Motion sensor, PIRB Motion sensor
9CO2-sensor Sensors for on-demand control
10 Extract air filter Filters extract air
11 Connector Connection for HMI service cable
12 Control system, terminal
block
Control system, connection of accessories
13 Fan unit For extract/exhaust air
14
Guide channel for condensa-
tion outlet (wall-mounted
unit)
Used when condensation outlet is fitted
15
Condensation tray Collects condensate from counterflow heat exchangers.
Leads any condensate via condensate pump (optional/
accessory).
16 Smoke detector Smoke detector mounted in the outdoor air
17 Counterflow heat exchanger Two aluminium counterflow heat exchangers
1.4.2 DEX unit, parts and materials
Cabinet The exterior of the cabinet is made of Aluzinc® The cabinet is insulated with 50 mm sound insulation
material.
Fans The unit contains two centrifugal fans with EC motors for extract air and supply air.
Counterflow heat
exchanger
The unit's counterflow heat exchangers are made of aluminium and are highly efficient. The counter-
flow heat exchangers can be taken out and cleaned.
Filters The unit includes built-in compact filters for both extract air and supply air, see section 4.3.
Condensation out-
let
The condensation tray is located under the counterflow heat exchangers. There will only be a conden-
sation outlet from the condensation tray if a condensation pump has been purchased. See also section
on connection of condensation outlet.
Bypass damper The unit has a variably adjustable bypass damper for temperature regulation and de-icing of counter-
flow heat exchangers during operation. See operating and service instructions for further description of
de-icing.
3006475-2022-12-16 Product information
11/36

1.5 Principal dimensions
1.5.1 Ceiling mounting - visible
DEX3060
1830
500
313
263
313
262
1245 272
263
O
315
O
315
1183
272
1245
147 926 110
RD14352-06
1577
262
291
3006475-2022-12-16 Product information
12/36

DEX3090
RD14353-07
2206
500
313
259
1640 253
263
1577
313
262
1183
2531640
147 926 110
262
291
259
Ø315
Ø315
3006475-2022-12-16 Product information
13/36

DEX3090
RD14354-04
2406
600
276
290
1857 273
290
O400
O400
1957
276
296
1463
2731857
627 80
296
345
123 633
3006475-2022-12-16 Product information
14/36

1.5.2 Partly integrated ceiling mounting
DEX3060 integrated
RD14355-05
1830
313 1245 272
263
Ø 315
Ø 315
500
263
1310
147 926 237
262
313 2721245
262
291
3006475-2022-12-16 Product information
15/36

DEX3090 integrated
RD14356-07
2206
313 1640 253
263
500
259
1310
147 926 237
313 2531640
291
262
262
259
Ø315
Ø315
3006475-2022-12-16 Product information
16/36

DEX3120 integrated
RD14357-04
2406
276 1857 273
290
Ø 400
Ø 400
600
290
1589
123 633 627 206
276 2731857
345
296
296
3006475-2022-12-16 Product information
17/36

2. Assembly
2.1 Ceiling-mounted or semi-integrated assembly
2.1.1 Ceiling and installation requirements
RD14287-01
When fitting the air handling unit, the ceiling must be:
● flat
● resistant to vibration
● level
● designed to bear the weight of the unit
The installer is responsible for ensuring that:
● correct and safe installation of the unit in accordance with applicable laws and regulations
● properly used fastening of the given design
3006475-2022-12-16 Assembly
18/36

2.1.2 Step by step assembly
Steps 1-14 Action
1
RD14370-01
The DEX is delivered in a standing position on the pallet for safe
transport.
Note:
● Check the air handling unit for damage– do not install damaged
air handling units.
● Once the plastic has been removed, the DEX air handling unit
must be protected against dirt and dust:
● The spigots should be covered until the spigots are connected to
the ventilation ducts.
● Whenever possible, keep the unit closed during fitting.
2 Carefully turn the DEX down on the doors and place it on a soft sur-
face to avoid scratches and dents.
3 On the ceiling measure the centre point where the DEX is to go and
mark off.
4 Mark the holes for the ceiling brackets and the holes for the ducts.
5 Drill all marked holes. The mounting method, hole sizes etc. will de-
pend on the material of the ceiling.
6 Mount and insulate the duct penetrations in the ceiling.
7 Mount the cowls on the roof.
8
RD13270_01
Lift the DEX into place with suitable lifting equipment (e.g. an electric
stacker), protecting the door from scratches with a piece of cardboard
or similar between the door and the lifting equipment. See unit
weight in the technical data section.
9 Check that the DEX is level and fix the unit by tightening all ceiling
brackets.
10 Connect the condensation outlet if a condensation pump is mounted
in the condensation tray. See section "Connecting the condensation
outlet".
11
Mount the housing panels:
● Hook the housing panel onto the top of the black brackets
● Lightly press the plate into place
● Screw the screws in the bracket from below on the housing
board - Important for safety reasons!
3006475-2022-12-16 Assembly
19/36

2.1.3 Requirements for partially integrated fitting
Fitting and access
to control system
When carrying out installation, ensure there is access to the control system. EXHAUSTO recommends
that the part of the ceiling next to the control system can be removed.
NB: The partly integrated DEX extracts a small amount of air above the suspended ceiling, which can
cause the filter to soil more quickly than usual. EXHAUSTO recommends leaving a 10 mm gap be-
tween the cabinet and the suspended ceiling.
2.2 Connection of condensation outlet
2.2.1 Condensation outlet guide channels (if condensation pump is mounted)
Wall-mounted DEX On wall-mounted units the condensation outlet is positioned with the outlet passing through the ex-
haust duct.
Ceiling-mounted
DEX
On ceiling-mounted units the condensation outlet is led through the internal guide channels (rubber
sleeves) out of the unit to the drain.
The penetrations in the unit must be executed so they remain airtight.
Condensate pump
(optional/accesso-
ry)
For technical data, see final section.
2.3 Connection of water heating coil HW (option)
2.3.1 Connecting the water
Valves for water
connection
It is recommended that shut-off valves are mounted on both water connections to enable the flow to be
interrupted for servicing.
The dimensioning of valves, pipes, etc. and the connection of the water heating
coil must always be carried out by authorised fitters in accordance with applica-
ble regulations and legislation.
Position of bleeder
valve on DEX
See keyed drawing for position of internal bleeder valve.
Automatic bleeder
valve
If the water connection is executed with vertical riser, so the heating coil in the DEX3000 is the highest
point in the pipe system, it is recommended that an automatic bleeder valve is fitted at the highest
point on the supply and return pipes.
3006475-2022-12-16 Assembly
20/36