IV Produkt IVC3 Installation guide

IV Produkt Control Unit IVC3 IVC3 Basic Manual 2004-12-15.doc
Basic Manual
IVC3 Control System
Rev 1.0

IV Produkt Control Unit IVC3 IVC3 Basic Manual 2004-12-15.doc
CONTENTS
1. Introduction 4
2. Function 4
2.1 Upstarts 4
2.2 Service-switch by operation unit 4
2.3 Fan speed, normal and forced 4
2.4 Revolving heat recovery 4
2.5 Heater 5
2.5.1 Water-heating-battery 5
2.5.2 Electrical heater 6
2.6 Cooler 6
2.6.1 Cooler, pump control 6
2.6.2 Cooler, DX-cooler 6
2.7 Chill recovery 6
2.8 Selection of temperature-control type 6
2.8.1 Supply air control 7
2.8.2 Extract air control 7
2.8.3 Room control 7
2.8.4 Climate adapted control 7
2.9 Control sequence 8
2.10 Night cooling 9
2.10.1 Night cooling, extract air temperature sensor 9
2.10.2 Night cooling, room temperature sensor 9
2.10.3 General conditions for night cooling 9
2.10.4 Night cooling settings 9
2.11 Night heating 10
2.11.1 Night heating, extract air temperature sensor 10
2.11.2 Night cooling, room temperature sensor 10
2.11.3 General conditions for night heating 10
2.11.4 Night heating settings 10
2.12 Limited airflow 10
2.13 Outdoor compensated setpoint 11
2.14 Extended operating time 11
3. Alarms 11
3.1 Fan alarm 11
3.2 Fire alarm 12
3.3 Freeze protection alarm 12
3.4 Alarm pump/overheating 12
3.5 Alarm pump/cooler 12
3.6 Alarm revolving heat recovery, VVX 12
3.7 AUX-input 12
3.8 Temperature deviation alarm 13
4. Time schedule 13
5. Manual overrun of output 14
6. LED 14
6.1 LED – RUN 14
6.2 LED – ALARM 14

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7. Description of inputs and outputs 14
7.1 Digital output (relay) 14
7.2 Digital output (triac) 15
7.3 Analogue output (0-10V
DC
) 15
7.4 Analogue input (passive sensor) 15
7.5 Digital input (from free contacts) 15
8. Parameter lists 16
8.1 Menu – ”Status” 16
8.2 Menu – ”Setup” 16
8.3 Menu – ”Settings” 17
8.4 Menu – ”Clock” 18
9. Communications 18

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1. Introduction
The control unit IVC3 is used to control an Air Handling Unit (AHU) with supply and
exhaust air fans, revolving heat recovery (Rot VVX), heater (electric or water) and
cooler .
2. Function
1.1 Start up
At start up the exhaust fan (EA) starts at set speed and the heat recovery at 100%. After 1 minute the
supply fan (SA) starts and control unit starts temperature regulation.
If the heater is a water-heater and outdoor temperature are below “temp. pump stop” the valve for
water-heater open to 50% during upstart.
2.2 Service-switch by operation unit (Settings menu – Fan Mode)
Four different operation modes can be set; STOP, NORMAL, FORCED and AUTO.
Settings Setting Description
Fan mode Stop
Normal
Forced
Auto
Unit stopped
Unit operates with SA and EA at normal speed
Unit operates with SA and EA at forced speed
Unit operates with fan speed according to time schedule
2.3 Fan speed, normal and forced
Four different operation modes can be set; STOP, NORMAL, FORCED and AUTO.
Settings Setting Description
SA normal 0-100% SA peed at normal speed
EA normal 0-100% EA peed at normal speed
SA forced 0-100% SA peed at forced speed
EA forced 0-100% EA peed at forced speed
2.4 Revolving heat recovery (VVX)
VVX can be configured as Analogue or Digital.
Setup Setting Description
Config. VVX Analog/Digital Selection if VVX is to be controlled by an analogue (o.10V)
or a digital output.
Configured as digital VVX the heat recovery will start and stop intermittent:
VVX-signal Digital VVX
0-33% 3 min run, 3 min stop
34-66% 9 min run, 3 min stop
67-100% Continuous run
When a substantial temperature difference is detected IVC3 will immediately shift to the correct
sequence without waiting for cycle time to run out.
Configured as analogue VVX the controller will only use the analogue output (0…10V DC).

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A rotation guard sensor connected to a digital input detects that the VVX is running. If the rotation
sensor don’t register a signal within every five minutes a B-alarm generates.
The revolving heat recover are running 12 minutes every 4 hour for conditioning.
2.5 Heater
By IVC3 an electrical or a water heater-battery can be controlled (selected in operation unit)..
Setup Setting Description
Config. Heater Water/El Selection of a water-heater or an electrical-heater.
2.5.1 Water-heating-battery
Water-heater is controlled in sequence with heat-recovery by 0…10V signal.
Freeze guard in IVC3 controls temperature in heater-battery (Setp. Freeze) by open valve at
decreasing temperature. If heater water temperature are decreasing below (Alarm Freeze) fan stops
and a A-alarm generates.
Set point for freeze guard (Setp. Freeze) decreases 13°at running unit.
Circulation pump for warm water configures for either exercise or continues operation. If exercise are
selected the pump will stop when outdoors temperature exceeds set limit (Temp. pump stop) plus a 2°
hysteresis, pump will start when outdoor temperature decrease set limit.
The pump will always start if valve opens.
Pump run are off delayed 4 minutes.
Pump exercises one minute once a day when stopped.
Setup Setting Description
CP Heat Exercise/
Cont.operation Selects if pump should operates continuously or if it should stop during summer.
Settings Setting Description
Temp. pump stop -30 - +30°C Selection of outdoors temperature for start/stop of
circulation-pump when configured as exercise
Setp. Freeze 0 - +60 °C Setpoint for minimum water temperature at non operating
unit (at operating unit the set point decreases with 13°).
Alarm Freeze 0 - +60 °C The water temperature for a freeze alarm, an A-alarm is set
up and the unit stops immediately.
Warm
water valve (V)
Warm water temperature
(ºC)
Freeze guard, water heater
Setp. Freeze (unit stopped)
Setp. Freeze decr. 13º (unit runs)
0
10
4º
Alarm Freeze
A-alarm
Unit stops

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2.5.2 Electrical heater.
Electrical heater are controlled in sequence with heat-recovery by a 0…10V analogue output.
At start of electrical heater the digital output will connect first and then will the analogue output starts
controlling.
Fan runs set time (3 minutes) for cooling down of electrical heater when unit shut down.
At fire alarm or emergency stop fans will stop immediately without any cooling down.
2.6 Cooler
IVC3 can in operating terminal be configured to control a cooler (Not installed / Installed).
2.6.1 Cooler, pump control
Circulation pump (CP cool) for chilled water configures for either exercise or continues operation. If
exercise are selected the pump will run/stop when valve opens/shuts.
Pump run are off delayed 4 minutes.
Pump exercises one minute once a day when stopped.
2.6.2 Cooler, DX-cooler
CP cool can be configured as DX cool for an one step cooler. Start and stop parameters for DX cool
are to be set in parameter menu (DX cool start / DX cool stop). DX cooler are start delayed 2 minutes
Heat recovery is delayed 2 minutes after a cooling sequence.
Setup Setting Description
Cool battery Not installed/
Installed Select if a cooler is to be controlled.
CP cool Excesice/
Cont.operation/
DX-cool
Circulation pump, run at needs whit exercise.
Circulation pump, continuous run.
DX-cooler controls on/off by digital output.
Settings Setting Description
DX cool start 0 – 100% Switch on point.
Visible only when Cool battery is selected as Installed.
DX cool stop 0 – 100% Switch off point.
Visible only when Cool battery is selected as Installed.
2. 7 Chill recovery
IVC3 can in operating terminal be configured for chill recovery (Cool recycl., Not installed / Installed).
In cooling sequence the VVX will start if outdoor temperature exceeds extract air temperature more
than 2°.
VVX runs with 100% during chill recovery. Chill recovery stops when extract air temperature don’t
exceeds outdoors temperature.
Setup Setting Description
Cool recycle. Not installed/
Installed Select if chill recovery is to be used in cooling sequence.

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2.8 Selection of temperature-control mode
Four different types of temperature-control mode are available; Supply air control, Extract air control,
Room control and Climate depended control (extract air at summer and supply air at winter).
Setup Setting Description
Regulation Supply air reg./
Exhaust air regl./
Room reg./
Climate dep. reg
Supply air control
Extract air control (cascade)
Room control (cascade)
Extract air cascade (summer), Supply air (winter)
2.8.1 Supply air control
Constant supply air temperature.
Settings Setting Description
Setp. Supply air 0-60°C Set point supply air temperature
2.8.2 Extract air control
Constant extract air temperature with min and max limits for supply air. Extract air temperature sets
set point for supply air to maintain a constant extract air temperature. Cascade factor 5.
Settings Setting Description
Setp. Main 0-60°C Main setpoint extract air temperature
Min. Supply air 0-60°C Minimum supply air temperature
Max. Supply air 0-60°C Maximum supply air temperature
2.8.3 Room control
Constant room temperature with min and max limits for supply air. Room temperature sets set point for
supply air to maintain a constant extract air temperature. Cascade factor 5.
Settings Setting Description
Setp. Main 0-60°C Main setpoint room temperature
Min. Supply air 0-60°C Minimum supply air temperature
Max. Supply air 0-60°C Maximum supply air temperature
2.8.4 Climate adapted control
At this solution the controller operates as a exhaust air controller in summertime and supply air
controller in wintertime.
Settings Setting Description
Setp. Main 0-60°C Main setpoint room temperature (summer)
Setp. Supply air 0-60°C Set point supply air temperature (winter)
Min. Supply air 0-60°C Minimum supply air temperature
Max. Supply air 0-60°C Maximum supply air temperature
Outdoors temperature is according to set value shifting between control mode summer and winter.
Shift point differs by a 2°hysteresis and 30 minutes delayed changing to supply air control.

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Fan speed is linear reduced from forced to normal when outdoor temperature decreases from “Outd.
Temp. fan forced” to “Outd. Temp. fan normal”.
Fans will gain forced speed immediately at cooling sequence even if climate controller hasn’t achieved
forced speed.
By input for external timer the fans will run on forced speed.
Settings Setting Description
Outd. Temp. fan
normal -30 - +30 °C See fig. above
Outd. Temp. fan
forced -30 - +30 °C See fig. above
2.9 Control sequence
Cooler, heat recovery (VVX) and heater will in sequence control the temperature. At warming demand
the output to cooler decreases, than VVX starts (with different run/stop intervals out of needs at digital
VVX or with an increasing output signal at analogue VVX) and finally increased output signal to
heater.
The sequence is opposite at cooling request.
Output SA, EA (V)
Outdoor (ºC)
Climate adapted control
Outd. Temp fan
normal
Outd. Temp. fan
forced
Normal
forced
Extract air control Supply air control
Hysteresis 2º
0
10
Output signal (V)
HEATER VVX
Recovery
COOLER
Set point
supply
Dead zon
2ºC
Supply temp. (ºC)
Sequences

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IVC3 has integrated PI-regulators for cooling and heating. PI-regulator parameters are not
changeable:
Heat seq. Cool seq.
P-band 17°11°
I-time 2 min 3 min
2.10 Night cooling
Night cooling is selected from operation terminal (Not installed / Installed).
Facilities are chilled with fresh outdoor air.
IVC3 measures outdoor temperature continuously during operating time to decide if night cooling are
possibly after ordinary operating time. Night cooling is allowed if outdoor temperature constantly has
exceeded 20°during one hour.
2.10.1 Night cooling, extract air temperature sensor
The IVC3 will after operating-time wait a set delay before starting night cooling. Controller measures
extract air temperature for 5 minutes to decide if night cooling is needed. If extract air temperature
after check exceeds set start limit (Night cooling start) the unit run until extract air temperature are
more than 1°below start point. Unit will in night cooling run on forced speed SA and EA. Cooler,
recovery and heater are always blocked during night cooling.
2.10.2 Night cooling, room temperature sensor
Controller measures continuously room temperature to decide if night cooling is needed. If room
temperature exceeds set start limit (Night cooling start) the unit will start for night cooling until room
temperature are more than 1°below start point. Unit will in night cooling run on forced speed SA and
EA. Cooler, recovery and heater are always blocked during night cooling.
2.10.3 General conditions for night cooling
During night cooling the controller continuously compares extract air (or room) temperature with
outdoor temperature for to decide if there are chill effects (extract air or room temperature has to
exceed outdoor temperature with at least 4°to allow night cooling). When no chill effect are available
the night cooling are shut down and (with extract air sensor) would not start until after a new start
delay. With room sensor night cooling will start when chill effects are available.
Night cooling has a minimum run time of 20 minutes.
Heater is blocked 3 hour after night cooling.
2.10.4 Night cooling, settings
Setup Setting Description
Night cooling Not installed/
Installed Select if night cooling is to be used.

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Settings Setting Description
Night cooling
Interv.: 10-250 min Delay before starting night cooling after end of daytime. Only when extract air temp. sensor is used.
Night cooling
Start: 0-60°C Start and stop temperature night cooling.
Start limit: room/extract air temp. >= Start
Stop limit: room/extract air temp. <= Start –1°
2.11 Night heating
Night heating is selected from operation terminal (Not installed / Installed).
IVC3 measures outdoor temperature continuously during operating time to decide if night heating is
possible after ordinary operating time. Night heating is not allowed if outdoor temperature constantly
has exceeded 20°during one hour
2.11.1 Night heating, extract air temperature sensor
The IVC3 will after operating-time wait a set delay before starting night heating. Controller measures
extract air temperature for 5 minutes to decide if night heating is needed. If extract air temperature
after check not exceeds set start limit (Night heating start) the unit would than continue until extract air
temperature are more than 1°above start point. Unit will in night heating mode run on forced speed
SA. It is selectable in operating terminal if EA are to be used in night heating (EA night heating).
Ordinary temperature set points are used in night heating.
2.11.2 Night heating, room temperature sensor
Controller measures continuously room temperature to decide if night cooling is needed. If room
temperature drops below set start limit (Night heating start) the unit will start for night heating until
room temperature are more than 1°above start point. Unit will in night heating mode run on forced
speed SA. It is selectable in operating terminal if EA are to be used in night heating (EA night heating).
Ordinary temperature set points are used in night heating.
2.11.3 General conditions for night heating
The revolving recover are blocked if EA has been set not to run during night heating.
Night heating has a min run time of 20 minutes.
2.11.4 Night heating, settings
Setup Setting Description
Night heating Not installed/
Installed Select if night cooling is to be used.
Settings Setting Description
Nattvärme
Interv.: 10-250 min Delay before starting night heating after end of daytime. Only when extract air temp. sensor is used.
Nattvärme
Start: 0-60°C Start and stop temperature night cheating.
Start limit: room/extract air temp. <= Start
Stop limit: room/extract air temp. >= Start+1°
EA night
heating Start/Stop Select if exhaust air fan is to be used at night heating.
2.12 Limited air flow

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Fan speeds are reduced from forced to normal if outdoors temperature drops below set limit (Outd.
Temp. fan). Fan speed returns to forced when outdoors temperature exceeds limit with more than 2°.
At climate adapted control fan speed sets linear from forced to normal out of set value (Outd. Temp.
fan forced and Outd. Temp. fan normal).
Settings Setting Description
Outd. Temp. fan
Normal: -30 - +30 °C Fan speed limits to normal speed at outdoor temp. below set value.
(Climate dep. vent., se chapter 2.8.4)
2.13 Outdoor compensated setpoint
IVC3 are configurable for outdoor temperature compensation of set point. Summer and/or winter
compensation are available. Two limits for outdoor temperature and a compensation value for each
summer and winter can be set.
Settings Setting Description
Outd comp summer
Temp 1 -30 - +30 °C Setpoint for start of summer compensation (at this point there is no compensation)
Outd comp summer
Temp 2 -30 - +30 °C Setpoint for full summer compensation (at this point compensation has is full influence on temp. control)
Outd comp summer
Comp -30 - +30 °C The value that compensation would achieve at “Temp 2” summer.
Outd comp winter
Temp 1 -30 - +30 °C Setpoint for full winter compensation (at this point compensation has is full influence on temp. control)
Outd comp winter
Temp 2 -30 - +30 °C Setpoint for start of winter compensation (at this point there is no compensation)
Outd comp winter
Comp -30 - +30 °C The value that compensation would achieve at “Temp 1” winter.
2.14 Extended operating time
Extended operating time initiates by an external switch via digital input (activated by a closing contact).
At extended operating time the unit runs with fans in forced speed
When external switch is turned off (open contact) the unit return to operate according to internal time
schedule.
Outdoortemp. (ºC)
Outdoor compensation
Outd. comp summer
Temp 1
Outd. comp summer
Temp 2
Outd. comp winter
Temp 1
Outd. comp winter
Temp 2
Outd. comp summer
comp.
Outd. comp winter
comp.
Setpoint displacement (ºC)

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3. Alarms
3.1 Fan alarm
Fan alarm activates by fault indication from SA or/and EA after set delay. Alarm at closed contact.
Result: alarm category B, unit stops.
Setup Setting Description
Delay Fan Alarm 0-60 min Time delay in IVC3 before a B-alarm is set and unit stops.
3.2 Fire alarm
Alarm activates by external fire alarm equipment. Alarm at open contact.
Result: alarm category A, unit stops.
3.3 Freeze protection alarm
Freeze alarm activates if temperature drops below set alarm limit.
Settings Setting Description
Alarm Freeze 0 - +60 °C Alarm limit for freeze guard, A-alarm is set and unit stops.
Result: alarm category A, unit stops.
3.4 Alarm pump/overheating
Alarm activates by fault indication from pump or if electrical heater indicates overheating. Alarm at
closed contact.
Alarm is set by a closing external contact.
Result water heater: alarm category B, unit stops if heater valve are opened, unit operates as usual if
heater valve are closed.
Result electrical heater: alarm category B, unit operates as usual, electrical heater stops.
3.5 Alarm pump/cooler
Alarm activates by fault indication from pump or alarm indication from cooler. Alarm at closed contact.
Result water cooler: alarm category B, unit operates as usual.
Result cooler: alarm category B, unit operates as usual, cooler stops.
3.6 Alarm revolving heat recovery
An inductive sensor via digital input detects if VVX are running. Alarm activates if sensor don’t signal
every 5 minutes when VVX are operating.
Result: alarm category B, unit operates as usual.

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3.7 AUX-input
The AUX-input is configurable as A-alarm, B-alarm or stop.
Alarm is set by a closing external contact.
Stop (emergency stop) activates at closed contact
Setup Setting Description
Config. AUX Alarm A
Alarm B
Stop
AUX sets an A-alarm and unit stops.
AUX sets an B-alarm, unit operates as usual.
Emergency stop, unit stops, no overrun time of fans.
Delay AUX 0-60 min Delay before an A or B-alarm is set up.
Not used at emergency stop.
Result:
A-alarm: Unit stops.
B-alarm: Unit operates as usual.
Emergency stop: Unit stops, no overrun time of fans. No alarm is set up.
3.8 Temperature deviation alarm (Alarm temp. fail)
If supply air temperature constantly deviates from setpoint more than set limit during 30 minutes a B-
alarm is set up. If supply air temperature would deviate another 5°an A-alarm is set up and the unit
stops.
On a rise in supply air temperature a deviation would only result in a B-alarm and unit operates as
usual.
No alarm would be set up at a unit without cooler if outdoor temperature exceeds +20°C.
Settings Setting Description
Alarm temp.
fail 0-60°C Deviation limit from setpoint for supply air temperature, a B- alarm is set up after more than 30 minutes deviation.
An A-alarm is set up and unit stops if temperature drops
more than 5°below low limit.
4. Time schedule
At Fan mode set to Auto the unit operates according to settings in time schedule at the Clock menu.
Time schedule sets from operating terminal.
Four events (time and mode) a day can be set.
The times can be set to hours or half-hours. At each set time an operating mode (stop, normal or
forced) is to be set, unit runs on set mode until a new mode appears in time schedule..
Time schedule can be configured for individual day settings or groups (workdays and weekend).
Four different time events are to be set for each day (1-7) when configured as individual day.
Four different time events are to be set for workdays (1-5) and four events for weekend (6-7) when
configured as groups.
IVC3 is equipped with a real time clock for weekdays, hours and minutes.
The real time clock has power back-up.

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Clock Setting Description
Actual time Time: 00:00-24:00
Day: 1-7 Actual day, hour and minute
Program. mode D= 1-5, 6-7
D= 1,2,3,4,5,6,7 Group settings (workdays and weekend) Individual day settings
Day: X(-X) Time: X
00:00 Mode: Stop
Time: 00:00-23:30
Mode:
Stop,normal,forc.
Setting of event time (hour or half-hour) for each
day (four different) or each group (four different)
and operating mode for each event.
-button or -button to manoeuvre in time
schedule.
5. Manual overrun of output
The outputs can be manual set (0-100%) by operating terminal at test and function control.
Setup Setting Description
Manual operation Off/On Make outputs available for manual overrun
Run-LED (yellow) pulse indicates when an output is manually set.
Only configured outputs are enable for manual overrun. Not configured outputs are hidden or
displayed not installed.
Settings Setting Description
SA man. 0-100% Supply air fan, manual overrun output-value
EA man. 0-100% Exhaust air fan, manual overrun output-value
Rot. VVX man. 0-100% Revolving heat recovery, manual overrun output-value
H-valve man. 0-100% Heater valve, manual overrun output-value
C-valve man. 0-100% Cooler valve, manual overrun output-value
El heater man. 0-100% Electrical heater, manual overrun output-value
CP heat man. 0-100% Cirkulation pump, manual overrun output-value
CP cool man. 0-100% Cirkulation pump, manual overrun output-value
DX cool man. 0-100% Cirkulation pump, manual overrun output-value
6. LED
LED on operating terminal and controller indicates RUN and ALARM status.
6.1 LED – RUN
Diodstatus Function
Dark Unit stop
Pulse Manual run
Lit Normal run
6.2 LED - ALARM
Diodstatus Function
Dark No alarm
FastLit Alarm

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7. Description of In- and Outputs
7.1 Digital outputs (relay)
1. Pump, heater / electrical heater (230 VAC)
2. Pump, cooler / DX-cooler (230 VAC)
3. Supply Air fan, SA (24 VAC)
4. Exhaust Air fan, EA (24 VAC)
5. Collective fault A (24 VAC)
6. Collective fault B (24 VAC)
7.2 Digital output (triac)
1. Revolving heat recovery, VVX (230 VAC)
7.3 Analogue output (0…10 VDC)
1. Heater
2. Cooler
3. Supply Air fan, SA
4. Exhaust Air fan, EA
5. Heat recovery, VVX
7.4 Analogue input (passive sensor)
1. Supply air temperature -30°C - +80°C
2. Outdoor air temperature -30°C - +80°C
3. Freeze protection temperature -30°C - +80°C
4. Exhaust air / room temperature -30°C - +80°C
7.5 Digital input (from free contacts)
1. Alarm fans
2. Extended operation input
3. Rotation guard VVX (inductive sensor)
4. Fire alarm
5. Alarm heater pump / alarm electrical heater
6. Alarm cooler pump / alarm cooler
7. AUX-input

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8. Complete parameter lists
8.1 Menu – ”Status”
Parameters displayed in the Status menu are only readable.
Parameter Range Description
Setp. Main -30 - +80°C Display actual main setpoint
Setp. Supply air -30 - +80°C Display actual supply setpoint
Outdoor air -30 - +80°C Display actual outdoor temperature
Supply air -30 - +80°C Display actual supply air temperature
Room/Extract air
-30 - +80°C Display actual room/extract air temp.
Freeze guard -30 - +80°C Display actual heater temperature
Heat 0 – 100% Display actual heater output
Rot. VVX 0 – 100% Display actual recovery output
Cool 0 – 100% Display actual cooler output
SA 0 – 100% Display actual supply air fan output
EA 0 – 100% Display actual exhaust air fan output
8.2 Menu – ”SETUP”
In Setup menu are all configurations made.
Parameter Range Description Default
Meny/Menu Svenska/English Selection of language. Svenska
Config. heat El/Water Selection of a water or an electrical heater Water
CP heat Exesice/Cont.operation Selects if pump should operates
continuously or if it should stop during
summer.
Exercise
Cool battery Not installed/Installed Select if a cooler is to be controlled. Not installed
CP cool Exercise/Cont.operatio
n/DX cool Circulation pump, run at needs with exercise.
Circulation pump, continuous run.
DX-cooler controls on/off by digital output.
Exercise
Config. VVX Digital/Analog Selection if VVX is to be controlled by an
analogue (o.10V) or a digital output. Digital
Night cooling Not installed/Installed Select if night cooling is to be used. Not installed
Night heating Not installed/Installed Select if night heating is to be used. Not installed
Regulation Supply air reg./
Exhaust air regl./
Room reg./
Climate dep. reg
Supply air control
Extract air control (cascade)
Room control (cascade)
Extract air cascade (summer), Supply air
(winter)
Supply air
reg.
Cool recycl. Not installed/Installed Select if chill recovery is to be used in
cooling sequence. Not installed
Config. AUX ALARM B/ALARM
A/STOP AUX sets an A-alarm and unit stops. AUX sets an B-alarm, unit operates as
usual.
Emergency stop, unit stops, no overrun
time of fans.
ALARM B
Delay AUX 0-60 min Delay before an A or B-alarm is set up.
Not used at emergency stop. 3 min
Delay Fan Alarm 0-60 min Time delay in IVC3 before a B-alarm is set
of and unit stops. 3 min
Manual operation Off/On Make outputs available for manual overrun Off

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8.3 Meny – ”Settings”
In Setup menu are all settings made.
Parameter Range Description Default
Fan mode Stopp
Normal
Forcerad
Auto
Unit stopped
Unit operates with SA and EA at normal speed
Unit operates with SA and EA at forced speed
Unit operates with fan speed according to time
schedule
Stopp
Setp. Main 0-60°C Main setpoint room/extract air or climate adapted
control. 20°C
Setp. Supply air 0-60°C Setpoint supply air temperature 20°C
Minv. Supply air 0-60°C Minimum supply air temperature 16°C
Maxv. Supply air 0-60°C Maximum supply air temperature 28°C
Alarm temp. fail 0-60°C Deviation limit from setpoint for supply air temperature,
a B-alarm is set up after more than 30 minutes
deviation.
An A-alarm is set up and unit stops if temperature
drops more than 5°below low limit.
5°C
SA normal 0-100% SA peed at normal speed 40%
EA normal 0-100% EA peed at normal speed 40%
SA forced 0-100% SA peed at forced speed 80%
EA forced 0-100% EA peed at forced speed 80%
Outd. Temp fan
normal
-30 - +30 °C Fan speed limits to normal speed at outdoor temp.
below set value.
Climate adapted control: Low outdoor temperature, fan
speed normal at and below this point. See fig.
-25°C
0°C
Outd. Temp fan
forced
-30 - +30 °C Only at Climate adapted control:
High outdoor temperature, fan speed forced at and
above this point.
The point where controller shift between supply and
extract air control See fig.
14°C
Outd comp
summer Temp 1
-30 - +30 °C Setpoint for start of summer compensation (at this point
there is no compensation) 25°C
Outd comp
summer Temp 2
-30 - +30 °C Setpoint for full summer compensation (at this point
compensation has is full influence on temp. control) 30°C
Outd comp
summer Comp
-30 - +30 °C The value that compensation would achieve at “Temp
2” summer. 0 °C
Outd comp winter
Temp 1
-30 - +30 °C Setpoint for full winter compensation (at this point
compensation has is full influence on temp. control) -20°C
Outd comp winter
Temp 2
-30 - +30 °C Setpoint for start of winter compensation (at this point
there is no compensation) +5°C
Outd comp winter
Comp
-30 - +30 °C The value that compensation would achieve at “Temp
1” winter. 0°C
DX cool start 0 – 100% Switch on point.
Visible only when Cool battery is selected as Installed. 20%
DX cool stop 0 – 100% Switch off point.
Visible only when Cool battery is selected as Installed. 5%

IV Produkt Control Unit IVC3 IVC3 Basic Manual 2004-12-15.doc
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Menu – ”Settings”
Parameter Range Description Default
Temp. pump stop -30 - +30°C Selection of outdoors temperature for start/stop of
circulation-pump when configured as exercise 5°C
Setp. Freeze 0-60 °C Setpoint for minimum water temperature at non operating
unit (at operating unit the set point decreases with 13°).
25°C
Alarm Freeze 0-60 °C The water temperature for a freeze alarm, an A-alarm is
set up and the unit stops immediately. 7°C
Night cooling
Interv.:
10-250 min Delay before starting night cooling after end of daytime.
Only when extract air temp. sensor is used. 240min
Night cooling
Start:
0-60°C Start and stop temperature night cooling.
Start limit: room/extract air temp. >= Start
Stop limit: room/extract air temp. <= Start –1°
24°C
Night heating
Interv.:
10-250 min Delay before starting night heating after end of daytime.
Only when extract air temp. sensor is used. 240min
Night heating
Start:
0-60°C Start and stop temperature night cheating.
Start limit: room/extract air temp. <= Start
Stop limit: room/extract air temp. >= Start+1°
16°C
EA night heating Start/Stop Select if exhaust air fan is to be used at night heating. Start
SA man. 0-100% Supply air fan, manual overrun output-value 0%
EA man. 0-100% Exhaust air fan, manual overrun output-value 0%
Rot. VVX man. 0-100% Revolving heat recovery, manual overrun output-value 0%
H-valve man. 0-100% Heater valve, manual overrun output-value 0%
C-valve man. 0-100% Cooler valve, manual overrun output-value 0%
El heater man. 0-100% Electrical heater, manual overrun output-value 0%
CP heat man. 0-100% Circulation pump, manual overrun output-value 0%
CP cool man. 0-100% Circulation pump, manual overrun output-value 0%
DX cool man. 0-100% Circulation pump, manual overrun output-value 0%
8.4 Menu – ”Clock”
I denna meny ställs aktuell tid in och tidkanalen konfigureras.
Parameter Range Description Default
Actual time Time: 00:00-24:00
Day: 1-7 Actual day, hour and minute __:__
Program. mode D= 1-5, 6-7
D= 1,2,3,4,5,6,7 Group settings (workdays and weekend)
Individual day settings
D= 1-5, 6-7
Day: X(-X) Time:
X
00:00 Mode: Stop
Time: 00:00-23:30
Mode: Stop,normal,forc. Setting of event time (hour or half- hour) for each day (four different)
or each group (four different) and
operating mode for each event.
-button or -button to
manoeuvre in time schedule.
Dag 1-5:
00:00 Stop
06:00 Normal
12:00 Normal
18:00 Stop
Dag 6-7
00:00 Stop
06:00 Stop
12:00 Stop
18:00 Stop
9. Communication
IVC3 communicates by RS232 with a MODBUS-RTU protocol. (Separate manual).