Cairox UKUNDA Owner's manual

18/10/18 1
UKUNDA
SIG AH
Heat Recovery unit Installation-Operation-Maintenance
reserves the right to change the specications of the product at any time without prior notice
Contents
1.0 INTRODUCTION 2
1.1 PRODUCT DESCRIPTION 2
2.0 MAIN LAYOUTS 3
3.0 MAIN COMPONENTS 4
3.1 SAFETY 5
4.0 INSTALLATION 5
5 DIMENSIONS AND WEIGHT 8
6 ELECTRICAL INSTALLATION 9
7 UNIT OPERATION 12
8 AVAILABLE ACCESSORIES & CONTROLS 13
9 FROST RISK 15
10 CONDENSATE TRAY 16
High efciency heat recovery ventilation units Installation-Operation-Maintenance Manual

2 18/10/18
ⒶⒷ
Ⓒ
Ⓓ
UKUNDA
SIG AH
Heat Recovery unit Installation-Operation-Maintenance
reserves the right to change the specications of the product at any time without prior notice
High efciency heat recovery ventilation units Installation-Operation-Maintenance Manual
This manual is part of the product and must be deliv-
ered with the ventilation unit.
This appliance is not intended for use by persons (in-
cluding children) with reduced physical, sensory or
mental capabilities, or lack of experience and knowl-
edge.
Children must be supervised.
The manufacturer will not be liable for damages re-
sulting from the failure to observe the safety instruc-
tions or improper use and or installation.
In the event of failure of the appliance and/or break-
age of any of its parts, deactivate it by disconnecting
it from the
electrical supply, and refrain from any attempt repair-
ing the unit and call for a qualied technician and orig-
inal spare parts.
It is responsibility of the installer to ensure that all of
the equipment is installed in compliance with the man-
ufacturers recommendations and with current local
1.0 INTRODUCTION
1.1 PRODUCT DESCRIPTION
legislation and codes of practice.
If these guidelines are not followed, the unit may experi-
ence a shortened life or may present a risk of unsafety.
To guarantee efciency and long working life, a unit in-
spection/maintenance should be carried out annually by
an expert technician.
The high efcient hear recovery unit is ideal for all re-
quirements in restaurants, ofces meeting rooms, class-
rooms, shops and warehouses.
The layout shall take into account the space necessary
for installation of the unit and mainteinance/service pur-
poses, consider the possible noise generation too.
The unit is for indoor installation only
The energy-recovery technology uses the heat of the
stale indoor air to be expelled in order to either heat the
incoming fresh air to a temperature much closer to the
existing indoor air.
ATTENTION :
spigots and rectangular connections are not delivered
The basic unit includes the following separate parts:
Ⓐ 1x unit complete with lter set
Ⓑ 1x manual
Ⓒ 1x touch screen controller
Ⓓ 2x spigot adapters (connections are not included)
ATTENTION :
spigots and rectangular connections are not delivered

18/10/18 3
UKUNDA
SIG AH
Heat Recovery unit Installation-Operation-Maintenance
reserves the right to change the specications of the product at any time without prior notice
2.0 MAIN LAYOUTS
HOC horizontal side connection layout
BACK
FRONT
supply fresh return exhaust

4 18/10/18
①
⑤
④
⑨
⑩
⑪
⑫
⑨
③
⑤
⑥
⑦
②
UKUNDA
SIG AH
Heat Recovery unit Installation-Operation-Maintenance
reserves the right to change the specications of the product at any time without prior notice
1Touch screen control (remotable)
2High efciency counterow heat exchanger
3Electronic box with connections
4Air lter
5Air lter
6Condensate discharge
7Bypass valve for free cooling
8Extract and supply fans
9Side panels
10 Unit body
11 IRS (PIR)
12 Accessory comparment (HWD - CWD)
UNIT WITH DUCTED RETURN
2.0 MAIN COMPONENTS

18/10/18 5
UKUNDA
SIG AH
Heat Recovery unit Installation-Operation-Maintenance
reserves the right to change the specications of the product at any time without prior notice
3.1 SAFETY
Installation has to be carried on by a qualied technician.
Unit and accessories must be supplied by a dedicated
power line and duly sized differential safety and thermal
protection. Before proceeding with maintenance please
unplug the system.
Unit and accessories must not be used as security ven-
tilation systems. Do not install in potentially explosive
atmosphere.
All control wires need be 50 mm away from power cable
(because of magnetic elds).
Use genuine spare parts only to be sure not to void war-
ranty.
Obey the local re regulations, as well as environmental
law requirements.
The manufacturer does not accept liability for this.
Observe as well the safety regulations and wear protec-
tive gloves.
The unit is designed to provide mechanical ventilation
with heat recovery. The unit can operate with constant
speed, constant air ow or constant pressure, with relat-
ed accessories. The unit is equipped with high efciency
heat exchanger (up to 95% heat can be recovered) and
with low consumption EC motors fan.
The unit is for indoor installation. Operation Temperature
Before starting installation check that the unit has been
supplied complete and undamaged. Visible loss or dam-
age is apparent at the time of delivery must be noted.
Noted loss or damage must be recorded in detail on the
delivery receipt. When recording loss or damage, please
use specic details and try to avoid general or generic
terms such as “box damaged” or “torn”.
Check also size, model and accessories.
The unit must be stored in a dry clean place protected
from frosting and magnetic elds in its original packag-
ing until installation.
In case of long-term storage, or inactivity the unit must
be protected from dust and moisture, and run the test
described in part 1 1995-11 DIN VDE 0702-1.
Don’t run the unit prior to complete installation.
4 INSTALLATION
During installation leave a free space to maintenance
and service. Tha access panels have to be opened for
that purpose, see free space reccomendation for ser-
vicing and to allow internal components to be removed
for cleaning or service (for ex. heat exchangers, fans,
lters).
3.2 UNIT CONSIGNEE AND STORAGE
is 0-40°C (without ambient frosting). For external Tem-
perature lower than -10°C preheater is recommended.
Do not continuously use the unit in the presence of water
vapor (both internal and external to the unit). For high
humidity atmosphere inquiry the manufacturer.
The automatic frost protection is provided by ow imbal-
ancing. Optional integrated heating coil for lower tem-
peratures is recommended.
Electronic controlled bypass damper is provided to sup-
ply ltered outside fresh air. Bypass opens and clos-
es according to the setting available on touch screen
(KTS) or can be driven by an external input. Min exter-
nal temperature to close bypass and threshold internal
temperature to open bypass can be set. High surface
area washable G4 lter (coarse) (on return side) and F7
ePM1 55%(fresh side) are standard.
Clogged lter alarm is by pressure sensors as standard.
Installing conditions and aeraulic system if not adequate
or properly planned can affect the nominal performanc-
es of the unit.

6 18/10/18
UKUNDA
SIG AH
Heat Recovery unit Installation-Operation-Maintenance
reserves the right to change the specications of the product at any time without prior notice
The unit is factory delivered on a returnable pallet to as-
sure an easy and safe transport. Do not disassemble it,
follow the instruction step by step.
For crane transportation all applicable safety regulations
crane must be respected.
• The unit must be lifted either with disposable pallet by
crane.
• The unit or the pallet edges are separated by a suitable
base (or by transport bars, trusses, wooden spacers, etc.)
to protect against damage.
• The same applies to any protruding Accessories (eg
equipment roof)
• transport bars, trusses, wooden spacers, cable loops,
pull ropes, lifting gear and other accessories required
for the crane transport are not included and therefore be
provided on site.
• Access panels and electronics controls must be always
closed and protected during transport.
4.1 UNIT HANDLING AND INSTALLATION
VERY IMPORTANT : FIX THE RETAINING SCREWS AGAIN
proceed reverse to reinstall the side access panels . x the screws
remove retaining
screws remove panels x the unit to
the ceiling
4.2 HANDLING PROCEDURE
TAKE THE SCREWS AWAY
FROM BACK SIDE
4.2.1 UNIT WITHOUT DUCTED RETURN
4.2.2 UNIT WITH DUCTED RETURN
x the plenum to the unit and x the unit
through the 2 holes
x the rod bars with 4
nuts (locknuts) and 4
washers per rod
use the existing
holes to x the
plenum

18/10/18 7
300 mm
600 mm 600 mm
UKUNDA
SIG AH
Heat Recovery unit Installation-Operation-Maintenance
reserves the right to change the specications of the product at any time without prior notice
Ceiling, wall, oor or surface must be hard, at and level.
Please also check the local atmosphere: the humidity in
the room where should no more than 65% rel. Particular-
ly, the structure in new attic buildings should be checked
prior to installation with the installer.
The ambient temperature and operating temperature
should not exceed + 40 ° C. The air temperatures in
and production facilities must be observed and may not
exceed 45 ° C.
The ventilation unit is not suitable for use in technological
processes when explosive or aggressive substances are
contained in the air stream.
Non-compliance with the instructions will void any war-
ranties for the proper function of the equipment as well as
the manufacturer responsibility.
4.2.3 BASIC REQUIREMENTS
Important:
Check the unit air ow layout and installation: it is not
possible to change the ordered layout in site and specic
user requirements are to be factory tted with dedicated
customization.
The installation place must be indoor and frost free.
Leave a free space for panel opening for service oper-
ation, for example lter extraction and eventual mainte-
nance.
The unit must be placed leveled: this is important to drain
the condensate. Remember the condensate ducting with
siphon.
VERY IMPORTANT : The unit can be mounted to the
ceiling using the two holes in the bracket .
Make sure that the backside panel is airtight .
See table of weight and dimensions for each size .
The supporting rods must be sized to carry at least 2
times the weight .
4.2.4 REQUIREMENTS FOR THE INSTALLATION PLACE
CEILING VOID
free space for service
and operation
free space for
service
and operation
free space for
service
and operation

8 18/10/18
DRAWN
CHECKED
ENG APPR
MGR APPR
Classe di tolleranza*:
ISO 2768-M
*Ove non diversamente specificato
NAME
Tech. Dept.
DATE
03/23/18
NAME:
SIZE
A2
FILE NAME: SG_TOP_PLENUM.dft
SHEET 1 OF 1
Material: LAM. ZINCATA
1,00 mm
Spessore:
SG_TOP_PLENUM
PROJECT:
Raggio di piega
R=1.3
Cava V10
Tutte le pieghe si
intendono a 90°
dove non
diversamente
specificato
O
200
O
200
O
200
O200
1530
1580 330
280
500
500
A /A1 [mm] B /B1 / B2 [mm] C[mm] D[mm] E[mm] F[mm]
G[mm]
H[mm] [kg]
40 1560/1400 1850/1400/150 250 190 260 365
200 1280 170
70 1860/1700 1850/1400/150 250 190 260 365
200 1580 201
120 1860/1700 1850/1400/150 350 250 300 365
315 1580 310
A
B
C
E
D
F
G
B1
B2
A1
F
H
H- 50
UKUNDA
SIG AH
Heat Recovery unit Installation-Operation-Maintenance
reserves the right to change the specications of the product at any time without prior notice
VIEW FROM TOP
VIEW FROM FRONT
VIEW FROM BACK SIDE
DO NOT SCALE
PLENUM FOR DUCTED RETURN
5 DIMENSIONS
SIZE WEIGHT

18/10/18 9
UKUNDA
SIG AH
Heat Recovery unit Installation-Operation-Maintenance
reserves the right to change the specications of the product at any time without prior notice
6 ELECTRICAL INSTALLATION PROCEDURE
Warning! Always unplug the unit during the installation.
The unit must be earthed, a fuse is available , protect each unit by residual-current circuit breaker (RCCB) and
thermomagnetic cut-out device.
We recommend to check if the supply system is already in accordance to your regional safety regulations.
Connect the wiring to the electrical box.
Touch screen control has to be connected to the board with a RJ45 8-pole Ethernet straight cable of Cat.5 (or
higher).
The unit can be equipped with two external control (Input 0-10 V) to set unit on-off, bypass on-off or proportional air
ow control; it can also give two output signals congurable on unit run-bypass open-unit fault.
Important: Input and output conguration is to be set in the touch screen control - service menu -.
Priority: when the unit receives an off command, whatever the input has given it, this has always the priority.
6.1 ELECTRIC CONNECTIONS
POWER CONNECTION :
1. Unscrew the electric box
small lid
2. Remove the cover to reach
the power plug and pull it
out, Connect the power cable
in conformity with the labels
located on the board
3. Close the box and lay the
cable under the cover recess
remove the left hand side panel

10 18/10/18
UKUNDA
SIG AH
Heat Recovery unit Installation-Operation-Maintenance
reserves the right to change the specications of the product at any time without prior notice
See power intake table for sizing the power cable. Always protect each unit with proper indipendent main
switch and safety protection (in accordance to the local laws).
Cable for remote control must be in accordance to the recommendatios you nd in the IOM of the remote control.
VERY IMPORTANT : cable through the cable guide

18/10/18 11
X4-1 X4-2 X4-3 X4-4 X4-5 X4-6 X4-7 X4-8 X4-9 X4-10 X4-11
MOD B MOD A GND GND INPUT 2 INPUT 1 +12V NO COM NO COM
〶
L
N
〶
X3-1
X3-2
X3-3
LN
〶
MR1
LN
BYPASS
MF1 CN1 CN2 TS TE TF TR
X1 X2 X3
L
N
UKUNDA
SIG AH
Heat Recovery unit Installation-Operation-Maintenance
reserves the right to change the specications of the product at any time without prior notice
6.2 ELECTRICAL BASIC SCHEMA:
BYPASS
TOUCH
SCREEN
AIR SENSORS
OR HEATING/
COOLING ACCES-
SORIES
FAN CONNECTIONS AIR TEMP. SENSORS
UNIT POWER
ELECTRIC BOARD
CONTROL BOARD
INTERNAL ACCES-
SORIES (OPTION)
Ex. AIR DUCT SENSOR
INTERNAL PREHEATER
supply
exhaust
fresh
return

12 18/10/18
contact 1
contact 2
connect
controller
controller
unit
fan +program
program
lter
service
UKUNDA
SIG AH
Heat Recovery unit Installation-Operation-Maintenance
reserves the right to change the specications of the product at any time without prior notice
NAME Description (when light is on)
FREE CONTACT 1 Free contact 1 is activated
FREE CONTACT 2 Free contact 2 is activated
COMM Accessories The connected accessories are communicating with
the unit
TOUCH SCREEN-PLUG The touch screen is powered
TOUCH SCREEN-ARROWS The touch screen is communicating with the unit
MAIN POWER The unit is powered
FAN Weekly program is set and fans are operating
WEEKLY Weekly program is set
FILTER Clogged lter see Maintenance and Troubleshooting
ALARM See Troubleshooting
7.0 UNIT OPERATION SIGNALS
On the electric box light are positioned to signal operation mode or communication status between unit and touch
screen or unit and accessories.
ICON

18/10/18 13
UKUNDA
SIG AH
Heat Recovery unit Installation-Operation-Maintenance
reserves the right to change the specications of the product at any time without prior notice
8 AVAILABLE ACCESSORIES AND CONTROLS
ACCESSORY
Detection and regulation
• CO2 ambient probe (APC)
• CO2 duct probe (DPC)
• VOC - volatile organic compound- ambient probe (APV)
• VOC - volatile organic compound- duct probe (DPV)
• Humidity ambient probe (APH)
• Humidity duct probe (DPH)
• Defrost system by ow imbalancing (DES)
• Bypass 100% (BPD)
• Electronically controlled electric pre heater (PEHD) (self contained)
• Electronically controlled pre hot water coil (PHWD) (self contained)
• Electronically controlled post hot water coil (HWD) (self contained)
• Electronically controlled chilled water coil (CWD) (self contained)
• Electronically controlled electric post heater (EHD) (self contained)
• Occupancy infra red sensor (IRS)
• Clogged lter alarm (pressure sensor) (DPS)
Control
• KTS control touch screen BASIC
• KTS control touch screen EXTRA
• Constant air ow operation (CAF)
Communication
• MODBUS module (MOD)
• MODBUS PROTOCOL CONVERTER (CVR)
• Network module for TCP/IP (NET)
• Radio frequence module (RFM)
CODE
■
◆
■
◆
■
◆
●
●
◆
◆
◆
◆
◆
●
●
■
■
■
◆
◆
◆
◆
A wide range of accessories is available. Ask for single technical sheet for further details.
■ outside the unit (option) ◆ inside the unit (option) ● factory fitted as standard

14 18/10/18
UKUNDA
SIG AH
Heat Recovery unit Installation-Operation-Maintenance
reserves the right to change the specications of the product at any time without prior notice
Hot water coils with electronic controls - heating mode (SIDE MODULE) 2 pipes
Electric postheater with electronic controls (FACTORY FITTED)
Chilled water coils with electronic controls - cooling mode (SIDE MODULE) 2 pipes
Size item ref.
number
Supply Capacity
[kW]
Air 20°C
80 HR
Water
7/12°C
P drop
Water
[kPa]
Water con-
nection
(female)
Electric
power
intake
[W]
Current
[A] Air
ow
rate
[m3/h]
40
ICWD
AHDCOLCWC131
230 V -50 Hz
3.84 kW 0.4 3/4” 50 0.4 350
70 AHDCOLCWC 132 5.40 kW 0.5 3/4” 87 0.7 550
120 AHDCOLCWC 133 9.21 kW 0.7 3/4” 150 1.2 950
Size item ref.
number Supply Capacity [kW] Current [A] ∆T [°C] Air ow
rate
[m3/h]
40
IEHD AELEH000808 230 V -50 Hz 0.75 6,5 11 400 70 6 700
120 AELEH000809 2 13 7 1200
Size item ref.
number
Supply Capacity
[kW]
Air 18°C
20 HR
Water
80/70°C
P drop
Water
[kPa]
Water
connection
(female)
Electric
power
intake
[W]
Current
[A] Air
ow
rate
[m3/h]
40
IHWD
AHDCOLHWC131
230 V -50 Hz
614,6 3/4” 50 0.4 350
70 AHDCOLHWC132 8.9 12.4 3/4” 87 0.7 550
120 AHDCOLHWC133 15.4 16.4 3/4” 150 1.2 950
Size item ref.
number Supply Capacity [kW] Current [A] Air ow
rate
[m3/h]
40
IPEHD AELEH000807 230 V -50 Hz 0.9 7.8 400 70 700
120 AELEH000810 1,5 9,7 1200
Electric preheater with electronic controls (FACTORY FITTED)
8.1 INTERNAL ACCESSORIES
A special execution is with internal heating/cooling accessories possible on request.
Size item ref.
number Supply cooling capacity
[kW]
Current
[A] Air Flow
rate
[m3/h]
40
IDXD
AHDGASDXD18
230 V -50 Hz
2,7 0.4 400
70 AHDGASDXD20 4.5 0.7 700
120 AHDGASDXD22 6,1 1.2 1200
Direct expansion coil with electronic controls (SIDE MODULE)

18/10/18 15
DRAWN
CHECKED
ENG APPR
MGR APPR
Classe di tolleranza*:
ISO 2768-M
*Ove non diversamente specificato
NAME
Tech. Dept.
DATE
01/10/14
NAME:
SIZE
A2
FILE NAME: asmCORRETTOnew.dft
SHEET 1 OF 1
Material:
Name?:Material
Spessore:
asmCORRETTOnew
PROJECT:
Raggio di piega
R=1.3
Cava V10
Tutte le pieghe si
intendono a 90°
dove non
diversamente
specificato
35-40 mm
25-30 mm
UKUNDA
SIG AH
Heat Recovery unit Installation-Operation-Maintenance
reserves the right to change the specications of the product at any time without prior notice
To prevent heat exchanger freezing, in winter, the ventila-
tion unit has anautomatic ow unbalancing system.
Temperature sensors measure the air temperature before
entering the heat exchanger and if necessary, the air ow
coming from outside is temporarily reduced.
The ow unbalance activates with downstream tem-
perature <= 3°C and the fresh air ow rate is decreased
proportionally to reach a safe temperature at the way out
the heat exchanger side exhaust air.
The maximum ow unbalance permitted is 75%.
The unbalancing cycle has a 20 minutes time duration.
For very low temperature (<-10°C) the accessory pre-
heater to heat up the outdoor air is recommended.
Protect the condensate drain from freezing in the winter
months with insulation or provide the pipe with trace
heating.
9 FROST RISK
It is important that the air handling unit is installed hori-
zontally. The condensate drain must be connected to a
site drain / siphon with water trap or an on-site conden-
sate pump.
During operation there may be a negative pressure up to
500 Pa (equivalent to a 50mm water column) enter in the
ow. In this case, the difference in height must be 50mm
minimum in the siphon.
Follow the indication on illustration to choose the height.
The condensate drain must be airtight from the unit until
the siphon so that the condensation water can be freely
discharged from the device.
Is not airtight the condensate drain, false air is sucked
into the condensate drain, and the condensed water can
be derived from the device.
The unit is equipped with a water pump (internal) .
The manufacturer can not be held responsible for any
damage occurring due to non-compliance with the pro-
visions. The siphon must be installed at the exit of the
pipe from the unit. A constant slope of at least 1cm / m,
frost-free must be ensured up to the nal discharge. Pro-
tect against freezing until the end of the air is over. The
installer is responsible for ensuring that the condensate
drain is free from frost.
Important! Check one day before winter start-up, whether
water is in the condensate hose.
10 CONDENSATE DRAIN
sizing of siphon
operation pressure
in [Pa]
diveded by10
=height in [mm]
operation pressure
in [Pa]
multiplied by0.075
=height in [mm]
internal condensate pump

16 18/10/18
UKUNDA
SIG AH
Heat Recovery unit Installation-Operation-Maintenance
reserves the right to change the specications of the product at any time without prior notice
CE DECLARATION
DECLARATION OF CONFORMITY
Manufacturer : SIG Air Handling International
Address : Eerste Tochtweg 11 2913 LN Nieuwerkerk a/d Ijssel The Netherlands
Description of the product : UKUNDA size 40, 70, 120, ventilation unit complete with heat recovery
We declare that mentioned product above comply with following EC-directives and EN-standards:
93/37/EC , 2006/42/EC EC
Machinery Directive
2004/108/EC
EC EMC Directive , Electro Magnetic Compatibility
2006/95/EC
EC Low Voltage Directive
EN 60204-1 Safety Of Machinery - Electrical Equipment Of Machines - Part
1: General Requirements
EN 12100:2010 Safety of machinery ; basic concepts; general principles for
design
EN 60034-5 Rotating electric machinery ; part 5 : Protection classication for
electrical machinery
EN 60335-1 Electric domestic products and similar - safety general require-
ments
EN 60335-2-80 Electric domestic products and similar - safety general part 2:
special requirements for fans
Place and date : Zaventem , 29.01.18
Signature :
Marcel Pullens
(Product Manager)
SIG Air Handling
CE DECLARATION