REC RT 400S-EC-RS User manual

Ventilation unit RT 250/400S-EC-RS
REC Indovent AB, Box 37, 431 21 Mölndal | tel.[phone] |www.rec-indovent.se
1
User manual
DESIGN & TECHNICAL INFORMATION
OPERATION & CONTROL
MAINTENANCE & SERVICE
Exhaust air filter, article No: Q120101
Supply
air filter, article No: Q120100
Contains checklist for installation, adjustment, and start-up!

CONTENTS
Ventilation Unit RT 250/400S-EC-RS
REC Indovent AB, Box 37, 431 21 Mölndal | tel.[phone] |www.rec-indovent.se
2
page
Checklist 3
Quick guide
Short menu overview 4
Filter change 4
Design & technical information
Product description 5
Placement guide 5
Casing
Filter, exhaust air
By‐pass damper
Fan, exhaust air
Fan, supply air
Heat exchanger
Filter, supply air
Adjustable feet
Condensate drain
Control panel
Reheater
Operating / Alarm Indication
Functional diagram 6
Technical specification 7
Dimensions 7
Operation & control
General 8
Control panel
How to change values and settings
Menu guide 9
Installed options
1. Menu table user parameters 10
1.1. Main menu 13
Version
Language
Address
1.2. Temperature 14
Supply air control
Outdoor comp. supply air control
Room control
ECO-adjustment
Exhaust air control
Zonal room control
Limit for cooling
1.3. Fan control 15
1.4. Timer 15
Summer-/wintertime
Activate timer
Time schedule
Weekend schedule
1.5. Inputs/Outputs 16
Status analog inputs
Status digital inputs
Status analog outputs
Status digital outputs
Calibration of temperature sensors
1.6. Manual/Auto 16
Filter timer
1.7. Alarm history 17
1.8. Load settings 17
1.9. Unlock functions 17
1.10. Authorization 17
Options
Remote panel –Simple 18
Remote panel –3-way 18
Remote panel –with display 18
Stove mode 20
Maintenance & service
Cleaning 21
Changing filter 21
Cleaning fans and heat exchanger 21
Disassembly of fan pack and changer 21
Checking the condensate drain 21
Checking the outdoor air intake 22
Service 22
Disposal 22

REC Indovent AB, Box 37, 431 21 Mölndal | tel.[phone] |www.rec-indovent.se
3
CHECKLIST
Ventilation Unit RT 250/400S-EC-RS
Checklist installation, adjustment, and start up.
☐Mounting.
The unit is mounted according to the recommendations in this manual, section “installation &
adjustment”.
☐Reheater water.
Water pipes supply and return correctly connected. Red tape = supply, blue tape = return.
In addition, in the case of an external battery, check that the reheater is correctly connected to the
supply air duct so that the air flow going in the right direction.
Valve and actuator installed on the return line. (Electrically, it is normally connected from the factory).
☐Freeze protection sensor.
Freeze protection sensor is applied to the return line, insulated and electrically connected.
(In the case of internal water coil, this is pre-assembled from the factory).
☐Cooling coli.
Refrigerant supply and return correctly connected. Red tape = supply, blue tape = return. In addition,
check that the cooling battery is correctly connected to the supply air duct so that the air flow goes in
the right direction. Valve and actuator installed on the return line. (Electrically, it is normally connected
from the factory).
☐Duct-connection.
The units 4 duct connectors are correctly connected to the respective duct.
The out-air connector to the duct coming from outside the house.
The supply air connector to the duct that goes to living-room, bedroom and so on.
The extract air connector to the duct from kitchen, bathroom and so on.
The exhaust air connector to the duct that goes out of the house.
☐Sensor connection.
The out-air sensor is placed in the out-air duct.
The supply air sensor is placed in the supply air duct and at least 0,6m after reheater and possibly
cooling coil.
☐Condensate drain.
Condensate drain connected according to recommendations in this manual, section "Installation &
Adjustment".
☐Possibly additional accessories.
☐Outdoor air damper (ULS): Check function open / close
☐Fireplace switch: Check function
☐Remote panel easy (TG-R4): Check function
☐Remote panel with display: Check function
☐Remote panel 3-way: Check function
☐Airflows adjusted.
When all airflows are correctly adjusted, note the fan's normal %-rates here in the manual.
Supply air fan normal: % Extract air fan normal: %
_______________ _______________
☐Program function.
It is appreciated if the function of the digital inputs is noted below.
DI1: ☐Not active, ☐Min flow, ☐Boost flow, ☐Max flow, ☐Kitchen, ☐ECO, ☐Stove, ☐AH On/Off, ☐Normal.
DI2: ☐Not active, ☐Min flow, ☐Boost flow, ☐Max flow, ☐Kitchen, ☐ECO, ☐Stove, ☐AH On/Off, ☐Normal.
DI3: ☐Not active, ☐Min flow, ☐Boost flow, ☐Max flow, ☐Kitchen, ☐ECO, ☐Stove, ☐AH On/Off, ☐Normal.
DI6: ☐Not active, ☐Min flow, ☐Boost flow, ☐Max flow, ☐Kitchen, ☐ECO, ☐Stove, ☐AH On/Off, ☐Normal.
☐Save settings.
When everything is ready, please save the settings by activating the "Save settings" function.
(Then all settings can be revoked in the event of future service if something should go wrong).
See the Technical Manual for more info!
Date: ________________________ Name: __________________________________________

REC Indovent AB, Box 37, 431 21 Mölndal | tel.[phone] |www.rec-indovent.se
4
QUICK GUIDE
Ventilation Unit RT 250/400S-EC-RS
Short menu overview
The basic user functions can be accessed by scrolling with the arrow “down”from the main menu. For detailed
info, please study the menu structure and associated info text on the following pages in the manual.
In the menu:
- Temperature, you set the temperature wished.
- Fan control, you control the fans.
- Timer, you set your weekly schedule for different fan speeds if you wish.
- In/outputs, the status of in and outputs is shown.
- Manual/Auto, different functions can be controlled manually.
- Alarm history, you can see the latest alarms, but you cannot acknowledge.
- Load settings is it possible to reload latest saved settings.
- Unlock functions, you can activate additional functions (contact REC for help).
- Authorization, you log in for advanced settings, if you are a technician.
Filter change
When it’s time to change the filters, the normally green LED above the unit change to red, at the same time the
existing text on the line "Mode" in the display is alternated with the text "Change filter".
New filters can be ordered from REC Indovent AB at www.rec-indovent.se or telephone [phone].
Follow the description below. Feel free to also watch our instructional video on Youtube:
https://www.youtube.com/watch?v=sfyC7MEdPyM&t=24s
·Switch of the power.
·Open the unit's door.
·Remove the long Cover plate.
·Take hold of the filter or of the
clamp between the bags. Push the front part backwards,
downwards.
·The supply air filter is behind the inner cover plate, behind the
exhaust filter. Remove the filter.
·Clean accessible surfaces if necessary.
·Fit the new filters in reverse order (the blue, exhaust air filter, is
fitted in the front).
·Refit the cover plate.
·Close the door.
·Turn on the power.
Reset the filter alarm by acknowledging the alarm. Press the red button on the display, then press ok 2 times
then left arrow once.

DESIGN & TECHNICAL INFORMATION
Ventilation unit RT 250/400S-EC-RS
REC Indovent AB, Box 37, 431 21 Mölndal | tel.[phone] |www.rec-indovent.se
5
General description
RT 250/400S-EC-RS is an air handling unit
(compact cabinet) designed for ventilation of homes,
offices, nurseries or other smaller premises.
The Temovex unit is intended to be placed in
heated spaces such as laundry room, boiler room,
corridor or similar.
The system consists in it´s standard version of a
counterflow heat exchanger, two fans, two filters,
reheater, bypass damper and a control system.
Placement guide
1. Casing
2. Exhaust air filter
3. Bypass damper
4. Exhaust air fan
5. Supply air fan
6. Heat exchanger
7. Supply air filter
8. Inspection hatch
9. Adjustable feet
10. Condensate drain
11. Control panel
12. Reheater
1. Casing
The casing is made of hot galvanised sheet metal
with 30 mm insulation between the sheets. As a
standard, the side panels and the front are powder
coated in white. The front door has a magnetic strip
which keeps the door closed. The unit top has
sleeve connections where all ducts are connected.
2. Exhaust air filter
Coarse 60%, bag (art. No. Q120101)
3. Bypass damper
The Temovex AHU has an automatic bypass
damper which makes the air bypass the heat
exchanger whenever heat recovery is not
necessary. The bypass setting is adjusted on the
control panel.
4. Exhaust air fan
The unit has low-energy fan of EC type with
integrated overheating.
5. Supply air fan
The same type as exhaust air fan (see point 4)
6. Heat exchanger
Temovex counterflow heat exchanger is designed
by our own staff and is the result of 30 years
experience of high efficient counterflow heat
exchangers.
The heat exchanger is made of thin aluminium
sheets, and is completely sealed beetween the
supply air and exhaust air. This is important in
order to avoid odours and other contaminants to
seeping through to the fresh air side. The heat
exchanger has no moving parts, which eliminates
wear.
7. Supply air filter
ePM1-50%, bag (art. No. Q120100).
8. Inspection door
When cleaning the heat exchager or controlling the
condensate drain, the Inspection door is opened.
(See chapter "Maintenance & service").
9. Adjustable feet
The cabinet has adjustable rubber feet.
10. Condensate drain
The Temovex unit is fitted with a condensate drain
at the bottom of the unit. This should be connected
to a drain or fed to a floor drain.
11. Control panel
All settings for fan speed, reheating, bypass etc.
are made via the control panel and the AHU's
integrated control system.
If you have added optional parts to your Temovex
AHU, these functions, too, are set via the control
panel.
12. Reheater
RT 250/400S-EC-RS is fitted with an electric
reheater, 0.9 kW.
As an optional extra, a reinforced electric reheater,
1,8 kW, or a water coil (two different sizes) for
waterborne heating is offered. The heater is
integrated in the unit and settings are made via the
control panel.
In the case of a water coil, the water connections
are at the top of the unit, dimension DN12.
RT 250/400S-EC-RS with water coil includes a two-
way valve and valve motor in the delivery from REC.
1
2
3
4
5
6
7
8
9
10
11
12

DESIGN & TECHNICAL INFORMATION
Ventilation unit RT 250/400S-EC-RS
REC Indovent AB, Box 37, 431 21 Mölndal | tel.[phone] |www.rec-indovent.se
6
Functional diagram
VVX Counterflow heat exchanger
ST1 Bypass damper
EVB Reheater, electricity/water
GT1 Temperature sensor, Supply air ( red sensor )
GT11 Temperature sensor, outdoor air ( blue sensor )
TFR Filter, Supply air (Outdoor air)
FFR Filter, Exhaust air
TF Fan, Supply air
FF Fan, Exhaust air
GT2 Over heat protection (with electric heater)
GT3 Temperature sensor, Exhaust air ( yellow sensor )
GT7 Freeze protection (when water coil)
GT5 Temperature sensor, Extract air ( green sensor )

DESIGN & TECHNICAL INFORMATION
Ventilation unit RT 250/400S-EC-RS
REC Indovent AB, Box 37, 431 21 Mölndal | tel.[phone] |www.rec-indovent.se
7
Tecnical specification
Electric heater Water heater
RT250 RT400 RT250 RT400
Rated electric power (total) 1041 W 1145 W 141 W 245 W
fans 134 W 238 W 134 W 238 W
heater 900W - -
Extended heater (option) 900W - -
Power, water coil small - 1150 W11500 W1
Power, water coil big (option) - 2000 W1 2800 W1
Water connection - DN12
Voltage/Frequency 230 V, 50 Hz
Fuse 10 A
Filter, supply air / exhaust air Bag: art nr. Q120100 / Bag: art nr. Q120101
Weight 100 kg
Brandklass A15
Dimensions (WxDxH) 430x620x1900 mm
Duct connections 4 x Ø160 mm
Condensate drain ¾”
Storage Temperature Range -20 …. +50ºC
Operating Temperature 0 …. +50ºC
1At water temp. 55/45 °C and 70% of maximum flow.
Dimensions

REC Indovent AB, Box 37, 431 21 Mölndal | tel.[phone] |www.rec-indovent.se
8
OPERATION & CONTROL
Ventilation unit RT 250/400S-EC-RS
General
This is a description of the basic functions that you can modify to suit your own preferences and circumstances.
The unit’s control system optimizes the function according to the settings you make. As a user of the air handling
unit it is good to know the following:
In the menus for heating and cooling, where you as a user have the possibility to make changes, the “auto mode”
is the most optimized function. Should you choose a manual setting, On or Off, the manual settings take
precedence.
The unit’s various settings and the status of different values such as temperature etc. Can be viewed by scrolling
around in the menu system. Certain parameters and operational settings can also be changed. No basic system
configurations can be changed without authorization code (technician level).
There is a main menu that the system automatically reverts to approx. 25 minutes after the keys have been last
touched. The system also automatically logs you out after this time if you have logged in with a code.
Control unit
Up
Down
Right
Left
Confirm
Show alarm
Delete
Alarm Flashing There are one or more alarms that have not been acknowledged.
Steady There are one or more acknowledged alarms left.
Setting Flashing You are in a menu where it is possible to change some parameters.
Steady You are now in change position.
How to change values and settings
Scroll to the desired menu using the arrow keys. Press “OK”, and the adjustable variable will start blinking.
Change with the up or down arrow keys. Moving between lateral positions is done with the right or left arrow key.
When the correct value is set, confirm with “OK”. The cursor then moves to the other alterable variable in the
same menu.
OK
C
REC TEMOVEX
Mode: Normal
Status: Heating 100%
Temp. : 21.0 °C ↓
OK
C

REC Indovent AB, Box 37, 431 21 Mölndal | tel.[phone] |www.rec-indovent.se
9
OPERATION & CONTROL
Ventilation unit RT 250/400S-EC-RS
Menu guide
On the next page is a table that represents all menus in the program. The table also shows the default setting for
each parameter. If the unit, on delivery, deviates from the standard on any parameter, this is marked in the table.
(Any changed settings during installation, commissioning or thereafter should also be noted in the table).
Below is a small guide to how the menu table is structured. The table also contains references to sections further
back in the manual, with in-depth information about each menu.
Parameter Default setting Changed setting of this unit
1.1 Temperature
1.1.1. Supply air temp. (is displayed if supply air control is selected)
Setpoint 18,0 ˚C ☐__________ ˚C (10,0 –40,0 ˚C)
1.1.2. Supply air temp. (is displayed if outdoor compensated supply air control is selected)
1.1.2.1.
Outdoor comp. setp.
-20 ˚C 25 ˚C ☐__________ ˚C
-15 ˚C 24 ˚C ☐__________ ˚C
-10 ˚C 23 ˚C ☐__________ ˚C
-5 ˚C 23 ˚C ☐__________ ˚C
0 ˚C 22 ˚C ☐__________ ˚C
5 ˚C 20 ˚C ☐__________ ˚C
10 ˚C 18 ˚C ☐__________ ˚C
15 ˚C 18 ˚C ☐__________ ˚C
1.1.3. Room temp. (is displayed if room control is selected
Setpoint 21,0 ˚C ☐__________ ˚C (10,0 –28,0 ˚C)
ECO adjust. 2,0 ˚C ☐__________ ˚C (0 –10 ˚C)
1.1.4. Extract air temp. (is displayed if extract air control is selected)
Setpoint 21,0 ˚C ☐__________ ˚C (10,0 –28,0 ˚C)
ECO adjust. 2,0 ˚C ☐__________ ˚C (0 –10 ˚C)
1.2 Fan control
Fan mode Auto ☐Min. flow, ☐Boost flow, ☐Max flow, ☐Stove,
☐Kitchen, ☐ECO, ☐Fire, ☐Off
Installed options this unit
☐Cooling ☐ECO ☐ECO2
☐Outdoor air damper (ULS) ☐Remote panel - Easy (TG-R4) ☐Cp-heater
☐Condensation boiler (KAVK) ☐Remote panel –With display ☐Cp-chiller
☐Stove ☐Remote panel –3-way ☐
Sections in the manual with
in-depth information on the
current parameter.
Possible setting
range.
If the setting is changed:
select and enter the
current
value.
Menu text shown
on the display.
Extra infotext.
Possible choices
beyond standard.
Jump to
the next
column
with the
arrow key
right.
Jump to
the next
row with
the down
arrow
key.

REC Indovent AB, Box 37, 431 21 Mölndal | tel.[phone] |www.rec-indovent.se
10
OPERATION & CONTROL
Ventilation unit RT 250/400S-EC-RS
1. Menu table user parameters
Parameter Default setting Changed setting of this unit
1.1. REC TEMOVEX (Main menu)
Mode (Display of current operating mode)
Status (Display of status)
Temp. (Display of current setpoint)
1.1.1. Version
Version 2.4-1-00
S/N (Display of DUC serial no.)
(Date and time) "Current date and time" ☐"Current date and time"
1.1.1.1. Choose language English ☐Polish, ☐Swedish
1.1.1.1.1. Address
PLA 254 __________
ELA 30 __________
IP (Display of current value)
1.2. Temperature
1.2.1. Supply air temp. (is displayed if supply air control is selected)
Actual (Supply air temp..) (Display of current value)
Setpoint 18,0 ˚C __________ ˚C (10,0 –40,0 ˚C)
Outdoor air temp. (Display of current value)
Extract air temp. (Display of current value)
Exhaust air temp. (Display of current value)
Freeze P. temp. (Appears if water heater) (Display of current value)
1.2.2. Supply air temp. (is displayed if outdoor compensated supply air control is selected)
OD temp. (Display of current value)
Supply air temp. Act. (Display of current value)
Comp.SP (Display of current value)
Extract air temp. (Display of current value)
Exhaust air temp. (Display of current value)
Freeze P. temp. (Appears if water heater) (Display of current value)
1.2.2.1. Outdoor comp. Setp.
-20 ˚C 25 ˚C __________ ˚C
-15 ˚C 24 ˚C __________ ˚C
-10 ˚C 23 ˚C __________ ˚C
-5 ˚C 23 ˚C __________ ˚C
0 ˚C 22 ˚C __________ ˚C
5 ˚C 20 ˚C __________ ˚C
10 ˚C 18 ˚C __________ ˚C
15 ˚C 18 ˚C __________ ˚C
1.2.3. Room temp. (is displayed if room control is selected)
Actual (Room temp.) (Display of current value)
Setpoint. 21,0 ˚C __________ ˚C (10,0 –28,0 ˚C)
ECO adjust. 2,0 ˚C __________ ˚C (0 –10 ˚C)
Outdoor air temp. (Display of current value)
Supply air temp. (Display of current value)
Extract air temp. (Display of current value)
Exhaust air temp. (Display of current value)
Freeze P. temp. (Appears if water heater) (Display of current value)
1.2.4. Extract air temp. (is displayed if exhaust air control is selected)
Actual (Extract air temp.) (Display of current value)
Setpoint 21,0 ˚C __________ ˚C (10,0 –28,0 ˚C)
ECO adjust. 2,0 ˚C __________ ˚C (0 –10 ˚C)
Outdoor air temp. (Display of current value)
Supply air temp. (Display of current value)
Exhaust air temp. (Display of current value)
Freeze P. temp. (Appears if water heater) (Display of current value)
1.2.5. Room temp. bedroom (appears if zone control is selected)
Actual (Room temp. bedroom) (Display of current value)
Setpoint 19,0 ˚C __________ ˚C (10,0 –28,0 ˚C)
ECO adjust. 2,0 ˚C __________ ˚C (0 –10 ˚C)
Outdoor air temp. (Display of current value)
Supply air temp. (Display of current value)
Extract air temp. (Display of current value)
Exhaust air temp. (Display of current value)

REC Indovent AB, Box 37, 431 21 Mölndal | tel.[phone] |www.rec-indovent.se
11
OPERATION & CONTROL
Ventilation unit RT 250/400S-EC-RS
Freeze P. temp. (Appears if water heater) (Display of current value)
1.2.5.1. Room temp. living room (appears if zone control is selected)
Actual (Room temp. living room) (Display of current value)
Setpoint 21,0 ˚C __________ ˚C (10,0 –28,0 ˚C)
ECO adjust. 2,0 ˚C __________ ˚C (0 –10 ˚C)
Supply air temp. (Display of current value)
1.2.6. Cooling limit (is displayed if cooling is factory activated)
Outd. temp. >20,0 ˚C __________ ˚C
Hysteresis 1,0 ˚C __________ ˚C
1.3. Fan control
Fan mode Auto ☐Min. flow, ☐Boost flow, ☐Max flow, ☐Stove,
☐Kitchen, ☐ECO, ☐Fire, ☐Off
Speed (Display of the selected setting)
SAF (Display of current value and setpoint.)
EAF (Display of current value and setpoint.)
1.4. Timer
Time "Current time" ☐"Current time"
Date "Current date" ☐"Current date"
1.4.1. Summer/wintertime
Adjust clock automatically for
summertime Yes ☐No
1.4.2. Activate timer No ☐Yes
The timer controls Min. flow (Display of current selection. See pkt. "Timer" in section ”Configuration”)
1.4.2.1. Schedule
Monday
Period 1 08:00 –17:00 __________
Period 2 00:00 –00:00 __________
Monday->Friday
Period 1 08:00 –17:00 __________
Period 1 00:00 –00:00 __________
Tuesday
Period 1 08:00 –17:00 __________
Period 2 00:00 –00:00 __________
Wednesday
Period 1 08:00 –17:00 __________
Period 2 00:00 –00:00 __________
Thursday
Period 1 08:00 –17:00 __________
Period 2 00:00 –00:00 __________
Friday
Period 1 08:00 –17:00 __________
Period 2 00:00 –00:00 __________
Saturday
Period 1 00:00 –00:00 __________
Period 2 00:00 –00:00 __________
Saturday->Holiday
Period 1 00:00 –00:00 __________
Period 1 00:00 –00:00 __________
Sunday
Period 1 00:00 –00:00 __________
Period 2 00:00 –00:00 __________
Public holiday
Period 1 00:00 –00:00 __________
Period 2 00:00 –00:00 __________
1.4.2.2. Holiday schedule
Holiday (mm:dd)
1 01-01 - 01-01 __________
2 01-01 - 01-01 __________
3 01-01 - 01-01 __________
4 01-01 - 01-01 __________
5 01-01 - 01-01 __________
6 01-01 - 01-01 __________
7 01-01 - 01-01 __________
8 01-01 - 01-01 __________
9 01-01 - 01-01 __________

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12
OPERATION & CONTROL
Ventilation unit RT 250/400S-EC-RS
10 01-01 - 01-01 __________
11 01-01 - 01-01 __________
12 01-01 - 01-01 __________
13 01-01 - 01-01 __________
14 01-01 - 01-01 __________
15 01-01 - 01-01 __________
16 01-01 - 01-01 __________
17 01-01 - 01-01 __________
18 01-01 - 01-01 __________
19 01-01 - 01-01 __________
20 01-01 - 01-01 __________
21 01-01 - 01-01 __________
22 01-01 - 01-01 __________
23 01-01 - 01-01 __________
24 01-01 - 01-01 __________
1.5. In/Outputs
1.5.1. Analoga inputs (no settings, only display of current values)
AI1 OD temp (Display of current value)
AI2 SA temp (Display of current value)
AI3 EXT temp (Display of current value)
AI4 EA temp (Display of current value)
UAI1 (Display of current setting and value)
UAI2 (Display of current setting and value)
UAI3 (Display of current setting and value)
UAI4 (Display of current setting and value)
1.5.2. Digital inputs (no settings, only display of current values)
DI1 (Display of current setting and value)
DI2 (Display of current setting and value)
DI3 (Display of current setting and value)
DI4 SA Fan (Display of current alarm status.)
DI5 EA Fan (Display of current alarm status.)
DI6 (Display of current setting and value)
DI7 (Display of current setting and value)
DI8 Filter alarm (Display of current alarm status.)
1.5.3. Analog outputs (no settings, only display of current values)
AO1 SA fan (Display of current value)
AO2 EA fan (Display of current value)
AO3 Heater (Display of current value)
AO4 Chiller (Display of current value)
1.5.4. Digital outputs (no settings, only display of current values)
DO1 BP opening (Display of status)
DO2 BP closing (Display of status)
DO3 (Display of current setting and status)
DO4 (Display of current setting and status)
DO5 (Display of current setting and status)
DO6 (Display of current setting and status)
DO7 (Display of current setting and status)
1.5.5. Calibrate sensors
AI1 0,0 __________
AI2 0,0 __________
AI3 0,0 __________
AI4 0,0 __________
UAI1 0,0 __________
UAI2 0,0 __________
UAI3 0,0 __________
UAI4 0,0 __________
1.6. Manual/Auto
SA controller Auto ☐Off, ☐Manual __________ % (0 –100 %)
Supply air fan Auto ☐Off, ☐Manual __________ % (0 –100 %)
Exhaust air fan Auto ☐Off, ☐Manual __________ % (0 –100 %)

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13
OPERATION & CONTROL
Ventilation unit RT 250/400S-EC-RS
Heater Auto ☐Off, ☐Manual __________ % (0 –100 %)
Duct heater (appears if Zone Control is
enabled) Auto ☐Off, ☐Manual __________ % (0 –100 %)
BP / By-pass damper Auto ☐Off, ☐Manual __________ % (0 –100 %)
Pos. (Display of current status)
Chiller (appears if cooling is enabled) Auto ☐Off, ☐Manual __________ % (0 –100 %)
ULS / OD air damper (appears if ULS is
enabled Auto ☐Off, ☐On
KAVK / Cond. boiler (appears if KAVK is
enabled) Auto ☐Off, ☐On
CP / Circ. pump heater (appears if CP-
heater is enabled) Auto ☐Off, ☐On
CP / Circ. pump chiller (appears if CP-
chiller is enabled) Auto ☐Off, ☐On
1.6.1. Filter timer (appears if Filter timer is enabled)
Interval 12 months __________ months (6 –18 months)
Set zero No ☐Yes
1.7. Alarm history
(Displays info about the latest alarm events)
1.8. Load settings
Load saved settings No ☐Yes
1.9. Unlock functions
Input code 0 __________
1.10. Authorization
Log in
State code **** __________
Cur. level (Display of current login level)
1.1. REC TEMOVEX (Main menu)
Mode shows current fan mode. The unit can operate in several modes, depending on temperature and
commands given to the unit etc. The options available are Stop, Low, Normal, Boost, Max, Kitchen mode, Stove
mode, Night cooling, Defrost, ECO, Fire, ECO2 and Safe mode. For more info, please see the respective mode in
the manual.
Status shows the current heating/cooling level and % output. Possible modes are Heating xx%, Bypass xx% and
cooling xx%. If all have 0% output, ------ 0 % is shown.
Temp shows current temperature set-point.
1.1.1. Version
Displays program version and control-electronics’manufacturing number. Current date and time are also shown,
which also can be changed here.
1.1.1.1. Language
Select Swedish, English, or Polish.
1.1.1.1.1. Address
This shows the unit’s address. Can be changed.

REC Indovent AB, Box 37, 431 21 Mölndal | tel.[phone] |www.rec-indovent.se
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1.2. Temperature
Temperatures
Outdoor temperature is measured on incoming air at the point where the sensor is located. The sensor is placed
in the outdoor air duct as far from the unit as possible. The temperature may differ slightly from the actual outside
temperature, whichmay depend on the length of the duct, insulation etc.
Supply air temperature is measured in the supply air duct normally about one meter away from the unit. Supply air
is the fresh air that, after possible heating, is sent to the room.
Exhaust air temperature is measured in the exhaust air duct close to the unit. Exhaust air is the air that leaves the
room and returns to the unit.
Extract air temperature is measured in the extract air duct close to the unit. Extract air is the air that, after the heat
has been recovered, leavesthe unit, and is sent out of the house.
Room temperature is measured using an external sensor located in an appropriate place in the apartment/house.
Frost protection temperature is only used with water-based heating and shows the temperature of the return water
from the heating coil. When the water temperature is too low the unit will stop, to prevent freezing of the water
coil.
Control mode
What is displayed under temperature depends on the type of control mode selected. There are five different
control modes to choose from depending on the application: a) supply air control, b) cascaded exhaust air control,
c) cascaded room control, d) outdoor compensated supply air control and e) zonal room control.
For the temperature setting and readout, select the column below corresponding to your configuration.
1.2.1. Supply air control
This function is selected if you have a primary heating source other than ventilation, such as underfloor heating or
radiators. The temperature of the supply air is regulated by means of the supply air sensor. The setpoint for the
supply air is suitably set a few degrees lower than what the primary heating system is set for.
1.2.2. Outdoor compensated supply air control
This function is the same as above with the difference that the setpoint changes in relation to the outdoor
temperature. Thefunction can be used, for example, if the home is greatly affected by heat and cold, for example
through large windows.
1.2.2.1. Outdoor compensated setpoint
Enter the setpoint for the supply air, at the different outdoor temperatures stated, and the program calculates a
curve and controls according to that. What the currently setpoint is, can be seen in the menu.
1.2.3. Room control
At room control, a room sensor must be installed. The temperature of the supply air is then regulated to achieve
the desired temperature in the room (setpoint value on the room sensor). The function is suitably used when
ventilation also is the primary source of heating.
ECO adjustment
ECO adjustment is used if you want to lower the indoor temperature a few degrees, to save energy when you are
not at home. A temperature range is specified, within which heating, and cooling are inactive. For example, with
ECO adjustment 2 degrees and a setpoint of 20, heating and cooling will be inactive between 18 and 22 degrees.
For this to work, the ECO functionmust be activated at the factory.
1.2.4. Extract air control
This function is a slightly simpler room control. You do not need a room sensor, but the temperature in the room is
represented by the temperature in the extract air duct and control takes place for a constant extract air
temperature according to set setpoint.
ECO adjustment
See section 1.2.3. above.

REC Indovent AB, Box 37, 431 21 Mölndal | tel.[phone] |www.rec-indovent.se
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OPERATION & CONTROL
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1.2.5. Zone control
This is a more advanced form of room control, where you can have two zones with different temperatures such as
one temperature in the bedroom and another in the living room. However, it requires a little extra equipment such
as extra heaters and sensors etc.
1.2.6. Limit for cooling
The default setting is that cooling is not activated until the outside temperature is above +20 degrees. If you want
to change this, set the outdoor temperature at which the cooling can start. There is also an adjustable hysteresis
so that the cooling does not open and close all the time if the temperature is around the set value.
1.3. Fan control
In the operating menu you can set which mode the fans should run in. You can also see if the fans are running at
fixed speed or variable. You can also see current values and setpoints. The set values are seen within
parentheses.
Fan mode
In the fan control the following six modes are always available:
·Auto: The most optimal mode. This automatically controls the temperature acc. to the built-in and
optimized algorithms of the system.
·Min flow: This forces the system to run with the set minimum flow.
·Boost: This forces the system to boost the flow. Useful if you, for example, quickly would like to air out.
·Max flow: In this mode the fans run with maximum flow.
·Kitchen flow: Used while the cooker fan is used. During kitchen flow the supply air fan normally has a
higher flow than the exhaust air fan to compensate for the air that the cooker fan extracts.
·Off: In this mode all fans are off.
The following three modes are available if the feature is installed and configured. Even if the feature is not
configured, it is visible and can be selected, but the system will after a few seconds revert to the previous
selection.
·Stove: Used when a stove is being used. In the stove mode normally the supply air fan has a higher flow
than the exhaust air fan to compensate for the air that the stove extracts.
·ECO: Only used with room control or exhaust air control when you are not home. The fans go down to
minimum flow but are gradually increasing to normal flow based on heating or cooling needs. ECO
adjust gives a temperature range around the setpoint where neither heating nor cooling is active.
·Fire: Not used on this unit!
1.4. Timer
In the timer setting menu, the clock can be set, and the timer configured.
1.4.1. Summer / wintertime
This menu allows you to indicate if the time should be adjusted automatically for summer/wintertime.
1.4.2. Activate timer
The timer is not activated on delivery but by default connected to the functionMin. flow. The timer must be
activated if you want the times set under the time and holiday schedule to work. If you want to use the timer for
other than Min. flow, you change this in the configuration menu. See the Technician'sManual.
ATTENTION! If you use the timer to start and stop the unit at certain times, it is the time when the unit should be
running that you set in the schedule.
1.4.2.1. Time schedule
There is an option of two periods per day. NOTE! If you want the timer active from e.g., Monday 20:00 until
Tuesday 06:00 the setting should be Monday Per 2: 20:00 –24:00 and Tuesday Per 1: 00:00 –06:00.
If you have the same times recurring every day in the week you can use the function Monday ÚFriday.

REC Indovent AB, Box 37, 431 21 Mölndal | tel.[phone] |www.rec-indovent.se
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OPERATION & CONTROL
Ventilation unit RT 250/400S-EC-RS
If you want the same times on both Saturday, Sunday, and all holidays (specified in the holiday settings), you can
use the macro function Saturday ÚHoliday.
Otherwise, there is a special menu for the holiday times.
1.4.2.2. Weekend schedule
Up to 24 separate holiday periods for a full year can be set. A holiday period can be any number of days, from 1
to 365, in sequence. The dates are in the format: MM:DD (Imagine that you are entering a period from 00:00 one
day until 00:00 the next day. For example, holiday June 6th is written 06:06 –06:07.) When the current date falls
within a holiday period the operating period for “Holiday”will be used.
1.5. Inputs/Outputs
In this menu the status of all inputs and outputs can be controlled.
Sensors can also be calibrated.
1.5.1. Status analog inputs
This shows all the system’s current temperatures.
The universal inputs can be configured for different purposes such as temperature or 0-10V input. Can be eg
room sensors, anti-freeze sensors or pressure sensors, etc. Current values of resp. entrance are displayed.
Temperature in ˚C and pressure in Pa.
“Not active”means the input is not used (nothing is configured for the input).
1.5.2. Status digital inputs
”On" means that the system has detected a signal (24V) from the sensor/switch connected to the input.
"Off" therefore means that no signal (0V) is detected.
The alarm inputs can assume the status ok or Alarm.
DI4 and 5 are permanently allocated to fan alarms and normally show "OK".
DI8 (filter alarm) is not used, because the filter alarm has a timer on this unit.
1.5.3. Status analoga outputs
AO1-AO2 shows the current output voltage to the fans (TF=Supply air fan, FF=Exhaust air fan).
AO3 shows the current output voltage to the heater. Not sure that it is this output that controls the heat. It
depends on the configuration. If it is, for example, electric heating, it is controlled via digital output. However, the
heating equipment can always be seen on this output, 0-10V corresponds to 0-100% heat.
AO4 shows the cooling equipment if cooling is installed.
1.5.4. Status digital outputs.
DO1 and 2 are permanently allocated for bypass control.
DO3 is normally used to control the electric heating if this is available. If there is no electric heating, the output
can under certain conditions be used for other purposes if there is a shortage of outputs in the application.
DO4-DO7 are relay outputs that can be configured for various functions. "On" means that the relay is activated
and "Off" therefore means that the relay is not activated.
1.5.5. Calibration of temperature sensors
This gives the possibility to adjust the value for the temperature sensors up or down. (Set an offset value). May,
for example, be used to synchronize the old normal thermometer with the system temperature. Input the
difference here and they will display the same values.
1.6. Manual/Auto
In Manual/Auto a great number of functions may be controlled manually, which is very useful for commissioning
and troubleshooting.
That any output is controlled manually means that the normal regulation is put out of action. Therefore, a C alarm
is generated as soon as any output is set to a mode other than auto.

REC Indovent AB, Box 37, 431 21 Mölndal | tel.[phone] |www.rec-indovent.se
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OPERATION & CONTROL
Ventilation unit RT 250/400S-EC-RS
1.6.1. Filtertimer
In this menu, you can set the interval you want between filter changes. The menu also shows how many months
remain before the filters should be changed. ATTENTION! This value is only updated once a day. This means
that, if "Interval" is changed, "Time left" is not updated until the next day.
When it is time to change filter, this is indicated on the display on the row “Mode”by having the existing text
alternate with the text “Change filter”.
ATTENTION! If you change the filter prematurely (before the prompt in the display comes), you should reset the
timer in this menu so there is the correct time interval for the next change.
On the other hand, if you have been prompted to change the filter, you reset the timer by acknowledging the
alarm in the usual way.
You can also do reset in this menu if you wish.
1.7. Alarm
Current alarm
Current alarm and its status can be seen by pushing the red button.
Here the alarms may also be acknowledged, blocked, or unblocked (allow alarm).
An alarm that was confirmed, but where the error was not fixed will show as a confirmed error in the menu. As
soon as the error is fixed it will disappear from the menu (since it is already confirmed).
Some errors cause the unit to stop immediately, as it may be dangerous to allow regulation to continue.
You can also block an alarm to run the unit despite the alarm. NOTE! This you should not be done without proper
knowledge since it may cause danger and in worst case damage to property.
Alarm history
This shows the 21 latest alarm activities. E.g., whenthe alarm was triggered, when it was confirmed and/or reset
etc. No alarms may be confirmed, blocked etc here.
Example of alarm history:
1.8. Load settings
This reloads previously saved settings into the DUC, or if you have never saved anything the default settings.
All settings are loaded except date and time.
1.9. Unlock functions
Used if you add functions afterwards. Please contact your supplier!
1.10. Authorization
This is where a technician with proper access rights may log in to adjust the system and if necessary, change
certain parameters.
~
€
|
Sensor error OD
Temp
28 Feb 15:20 Klass:A
↓
Any menu
Back to previous menu
El.heat. overheated↑
28 Feb 14:34 Klass:A
El.heat. overheated
►Acknowledge
Block
OK
28 Feb 15:20 A ↑
El.heat. overheated
Activated
↓
28 Feb 13:50 A ↑
Sensor error OD
temp
Acknowledge
↓

REC Indovent AB, Box 37, 431 21 Mölndal | tel.[phone] |www.rec-indovent.se
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OPERATION & CONTROL
Ventilation unit RT 250/400S-EC-RS
Options
Remote panel –Simple (art.no. Q100446)
Remote panel - Simple (TG-R4) contains a temperature sensor and a set-point knob.
The unit is used as a room thermostat, but also allows you to shift the set-point within
a certain range.
The normal set-point is entered on the ventilation unit display and based on this value
the set-point may be adjusted using the knob on the Remote Panel –Simple plus or
minus a few degrees.
The adjusted set-point is shown on the main menu of the unit display.
Remote panel –Simple uses analog transmission of values to the unit.
Remote panel –3-way (art.no. Q100543)
Simple remote panel for easy activation of normal mode, minimum mode (ECO) and
forced mode.
Even potential alarms (red LED) are indicated on the panel.
Remote panel –with display (art.no. Q101299)
Remote panel –with display is the most advanced remote panel.
This also contains a temperature sensor and can be used as a
room thermostat. It also has a display and some keys allowing
you to see different temperatures and set them. You can also set
the fan speed and see a lot of other information. In addition, it
has an “away key”built in.
Temperature set-point display.
Normally (when you have not touched any key for the last 10 s) the set-point is shown on the display at the same
time as the indoor temperature symbol and the house symbol are turned on.
Change of the temperature set-point.
Pushing once on the menu selection key will cause the set-point symbol to start flashing and the possibility is
given to change the set-point using the adjustment keys. The value is saved when no keys have been touched for
10 s and the display reverts to showing the set-point.
Remote panel - Simple
Remote panel –3-way
Away mode
Adjustment keys
Menu selection
Remote panel –with display
Set-point symbol
Fan speed Kitchen/Stove
Fan symbol
Indoor temp symbol,
outdoor temp symbol
and house symbol
respectively
Away mode
BP open
Temperature

REC Indovent AB, Box 37, 431 21 Mölndal | tel.[phone] |www.rec-indovent.se
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OPERATION & CONTROL
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Display of actual temperature.
Pushing once more (within 10 s) on the menu selection key will turn off the set-point symbol, the indoor
temperature symbol will start flashing and the display will show the actual value. The adjustment keys have no
function in this case. When the keys have not been touched for 10 s, the display will revert to showing the set-
point.
Display of the outdoor temperature.
Pushing once more (within 10 s) on the menu selection key will turn off the indoor temperature symbol. At the
same time the outdoor temperature symbol is turned on and the outdoor temperature is shown in the display. The
adjustment keys have no function in this case. When the keys have not been touched for 10 s, the display will
revert to show the set-point.
Fan speed:
Pushing once more (within 10 s) on the menu selection key will turn on the fan symbol and the fan speed as well
as MAN or AUTO. The fan symbol will start flashing and the fan speed can be changed by stepping around to the
desired mode (min, normal, forced, or max) with the adjustment keys. The modes correspond to the setting in the
menu selection Mode on the main display and a change on the remote panel will also be shown on the main
panel.
The symbol MAN indicated that the unit is using a different mode than AUTO.
It may be that the unit is in a speed between min and max and normal and forced respectively due to forced or
safe mode. The symbol fan speed will show the actual fan mode according to the following:
·At fan speed 0 no box filled.
·< normal mode leftmost box turned on
·= normal mode the two leftmost boxes are turned on
·> normal mode but < = Forced mode the three leftmost boxes are turned on
·= max mode all boxes turned on
If the unit on the main display is run manually using Hand/Auto the fan speed will not be changed when changed
on the remote panel. What happens is that the changes are made on the symbols of the display and on the main
panel in the menu Mode but are not implemented on the fans until you exit the manual mode in Hand/Auto.
The new setting is saved when you continue with menu selections or after not having touched the keys for 10 s
and the display reverting to showing the set-point.
Kitchen/Stove.
The symbol kitchen/stove is turned on when the unit is operated in the stove or kitchen mode.
Away mode/ECO mode.
Pressing the away key will turn off the away mode symbol and the unit changes to ECO mode.
An additional press will make the mode revert.
The mode assumes that ECO is activated on the unit under system.
Bypass.
The bypass symbol is turned on when the bypass is > 0 % open.
Cool.
COOL is turned on if cooling is selected under system and the cooling valve is open > 0 %.
Heat.
HEAT is turned on if the controller requests > 0 % heating.
Alarm.
SERVICE is turned on if there is an unconfirmed alarm on the unit.
Off.
OFF is turned on if the unit is in the off mode.

REC Indovent AB, Box 37, 431 21 Mölndal | tel.[phone] |www.rec-indovent.se
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OPERATION & CONTROL
Ventilation unit RT 250/400S-EC-RS
Stove mode
Extent.
The stove mode must be activated from the factory to make the stove mode work.
In addition to the software configuration a momentary switch is included in the function (To
connect and configure please see the Technician Manual).
The stove mode means reduced exhaust air and increased supply air during the initial time
after the stove has been lit. It means that the cooling is blocked so that you do not cool out
the nice heating from the stove.
Start of stove timer.
Pushing once on the switch starts the stove mode and a timer starts counting down at the same time. If you regret
the choice, you can easily turn off the mode with a new push on the switch.
Stove indication.
That the stove mode is active is indicated on the indicator lamp in the switch.
For more extensive functional description see the Technician Manual under the section I/O configuration.