Schwank SchwankAir 4000 Series User manual

Instructions
SchwankAir Controller -
Heated Models
SchwankAir

Doors that are always or often left
open for longer periods
If a door is always, or often, left open it is possible
to use a function called CURRENT STAGE instead.
The fan and heating steps increase/decrease 6 or
9 steps [depending on the type of unit] and are
only controlled by the room temperature. Actual
Current stage is shown in the status screen. The
function current stage is activated in two ways:
When the door is closed - over run
When the door has been closed, high speed
mode remains during the xed time that is set
under Installer menu > Settings fan > Door over
run > High speed over run and at low speed
during a xed time under Installer menu > Settings
fan> Door over run > Low speed over run, on
the condition that it is sufciently warm in the
premises, otherwise the fans run until the desired
temperature has been reached.
When the door is closed, the set point value
shifts from room temperature + xed set point
value difference for open door to Room temp.
day/night.
Over run is factory set so that the over run
times are controlled according to how often
the door is opened [Auto mode under Installer
menu > Settings fan > Door over run >
Over run mode].
Doors that are always open
For a door that is always open, door mode
Fixed open > can be selected under Settings
fan > Door mode.
Doors that are often open
For a door that is often open Auto can be
selected under Installer menu > Settings fan
> Door mode. In Auto mode, the control
automatically switches between Fixed exible and
Fixed open modes depending on how often the
door has been open [when the door has been
open for longer than 300 seconds the function
changes from Fixed Flexible to Fixed Open].
schwankgroup.com/schwankair
Operating modes
Door that is opened and closed
The control function notes whether the door is
open or closed as standard, this mode is default
set and is called Fixed exible [the setting is under
Installer menu > Settings fan > Door mode].
Open door
Indicates OP on the installer status screen.
Fan control runs at high speed mode and is
controlled to outdoor temperature.
During dropping outdoor temperatures during
the winter and increasing outdoor temperatures
during summer the fan speed increases.
High speed limit is set under Main Menu > Fan
control > High speed limit. The control curves to
the outdoor temperature are set under Installer
menu > Settings fan > Fan speed increase where
temperatures for min- and max speed are set
for summer and winter modes. Normally it is
requested that heat is engaged when the door
is opened. The set point value [Room temp. day]
is then increased with the xed set point value
difference that can be changed under Installer
menu> Settings heating > Open door setp. diff.,
factory setting 3.0 K. The set point is set under
Main Menu > Temperature settings > Room temp.
day. If week program is used the night time set
point value is set under Main menu > Temp.
settings > Room temperature night. The room
temperature is regulated using the integrated
room temperature sensor or the external room
temperature sensor.
Closed door
Indicated CL on the installer status screen.
When heating demand the fan speed runs at low
speed which is set under Main menu > Fan speed
> Speed closed door. Heating is regulated to
Room temp. Day which is set under Main Menu >
Temperature settings > Room temp. day.
If week program is used the night time set point
value is regulated against the Room temperature
is set under Main menu > Temp. settings > Room
temperature night. The room temperature is
regulated using the integrated room temperature
sensor or the external room temperature sensor.
SchwankAir Controller

schwankgroup.com/schwankair
Function description of current stage
The task of the Current stage function is to
balance the room climate when a door is always
open by using the right combination of fan and
heating step.
In open mode, the room temperature is read
every 60 seconds [during the rst 6 cycles, and
then every 5 minutes and at each reading any
Current stage adjustments are made, i.e. fan
control and supplied output adjusted.
Winter
When the outdoor temperature is less than the
current setting on Installer menu> Settings fan >
Outdoor temp. limit.
• If the room temperature is more than 3
degrees below the current settings, the current
stage increases by 2 steps.
• If the room temperature is between 1 and 3
degrees below the current settings, the current
stage increases by 1 step.
• If the room temperature is more than 2
degrees above the current setting, the current
stage decreases by 1 step.
Summer
When the outdoor temperature is greater than
the current setting on Installer menu > Settings fan
> Outdoor temperature limiting. The heating is
blocked.
• If the room temperature is more than 2
degrees below the current settings, the current
stage increases by 1 step.
• If the room temperature is between 1 and 2
degrees below the current settings, the current
stage decreases by 1 step.
• If the room temperature is more than 2
degrees greater than the Current settings,
current stage increases by 1 step.
• If the room temperature is between 1 and 2
degrees above current settings, the current
stage decreases by 1 step.
If fan control has been max. limited under
Main Menu > Fan control> High speed limit, all
current stages will be used but the fan will be
limited to the current setting.
See the table on the next page.

schwankgroup.com/schwankair
SchwankAir Controller
Current stage Fan Stepless fan
5 speeds [output]
Stepless heat
[outlet temp.]2
Heating3
00 0 0 0
11 30% [3V] 0 0
22 47% [4.7V] 0 0
32 47% [4.7V] 86°F 1
43 64% [6.4V] 86°F 1
53 64% [6.4V] 95°F 2
64 81% [8.1V] 95°F 2
75 100% [10V] 95°F 2
85 100% [10V] 104°F 3
Table - Current stage for units with 5 fan step
Current stage Fan Stepless fan
5 speeds [output]
Stepless heat
[outlet temp.]2
Heating3
00 0 0 0
11 30% [3V] 0 0
22 60% [6V] 0 0
32 60% [6V] 86°F 1
43 100% [10V] 95°F 1
53 100% [10V] 104°F 2
Table - Current stage for units with 3 fan step

schwankgroup.com/schwankair
Back arrow
Overview
Status window
Forward arrow
Rotary dial
Alarm Red led
Run signal
Green led
IN
OUT
DOOR
CL
ºF
62
23
Fan speed step
Heating step
OFF Week program
Out of operation
Week program
Day
Week program
Night
Explanations
Status window
The display shows prevailing room temperature,
outdoor temperature, fan and heating step,
door status and day or night mode when week
program is used.
Forward arrow
Conrm selection and proceed.
Rotary dial
Scroll between alternatives
Back arrow
Go back.
After three minutes the control unit goes back to
displaying the status window.
Explanations
Press forward arrow to enter the main menu.
Status window
Current settings
Temperature settings
Fan control
System on/off
Installer menu
Main menu
Installer status screen
Week program
Fan settings
Heating settings
Filter guard settings
External control
General settings
Support menu
>Installer menu
ºF

schwankgroup.com/schwankair
SchwankAir Controller
Fan control
Possibility of setting high speed mode at an open
door and what speed should apply with a closed
door [3 or 5 steps depending on the unit].
Factory setting
High speed limit: 3 resp. 5 [1-3, resp. 1-5]
Speed closed door: 1 [Off-3, resp. Off-4]
Temperature settings
Fan control
System on/off
Main menu
High speed limit
• Step 5
Main menu>Fan control
High speed limit
Speed closed door
Main menu>Fan control
High speed limit
Speed closed door
Main menu>Fan control
Speed closed door
• Step 1
Main menu>Fan control
Switch the whole unit off manually. In Off the
display goes out; as soon as a button is pushed
the display lights and shows System on/off.
To activate the unit again select On.
The unit’s safety functions are still active when the
system is switched off, which means that the fan
can continue to run for a moment after mode Off
has been selected.
System on/off
Main menu
Fan control
System on/off
Installer menu
System on/off
• ON
Main menu>System on/off
Current settings
Displays set room temperature, high speed limit,
speed closed door and week program status.
Current settings
Room temp. day 68°F
Room temp. night 64°F
High speed limit Step 5
Speed closed door Step 1
Week program No program
Current settings
Temperature settings
Fan control
Main menu
Set the desired room temperatures to apply for
day respectively night mode, when the door is
closed [room temperature night is used for week
program/night reduction].
At open door these set point values automatically
increase with a set point differential that can be
set under Installer menu > Heat settings > Open
door setp. diff. [Factory setting 3.0 K].
Factory setting
Room temp. day: 68°F [41-95°F]
Room temp. night: 64°F [32-68°F]
Temperature settings
Main menu
Current settings
Temperature settings
Fan control
Room temp. day
Room temp. night
Main menu>Temperature settings
Main menu
Main menu
Current settings
Temperature settings
Fan control
System on/off
Installer menu

schwankgroup.com/schwankair
SchwankAir Controller
The installer menu is at the bottom of the main
menu, this is password protected. See Installer
menu in this manual.
Installer menu
Main menu
Fan control
System on/off
Installer Menu
Main menu>Installer menu
Enter password
0000
(See manual)
Check the settings. The installer status screen
consists of three pages with settings, scroll using
the rotary dial.
Installer status screen
FF
ºF
Installer status screen
Functionality mode Adv.
Eco / Comfort mode Comfort
Door mode Flexible
Over run mode
Program
>Installer menu
Installer status screen
Week program
Fan settings
Fan control
System on/off
Installer menu
Main menu Main menu>Installer menu
Enter password
000
(See manual)
>Installer menu
Installer status screen
Week program
Fan settings
Heating settings
Filter guard settings
External control
General settings
Support menu
Installer menu
To enter the Installer menu, code 1932 is entered.
Select the digits using the rotary dial and conrm
using the forward arrow.
Make settings for week program.
A basic program is pre-entered.
Mon-Fri Day from 08:00, Night from 18:00
Sat Day from 10:00, Night from 16:00
Sun Day from 11:00:00, Night from 14:00
To check which program is set for a particular
day, select Check program and then switch
between the days using the rotary dial.
To check which days a certain program is active,
select a week day by pressing the forward arrow,
the program is marked and those days that
the program is used will be underlined, switch
between the programs for a particular day using
the rotary wheel.
Week program
>Installer menu
Installer status screen
Week program
Fan settings
>Installer menu>Week program
New program step
Check program
Change program
Check program
Mon Tue Wed Thu Fri Sat Sun
08:00 Day (1)
18:00 Night (2)
Check program
Mon Tue Wed Thu Fri Sat Sun
08:00 Day (1)
18:00 Night (2)

schwankgroup.com/schwankair
SchwankAir Controller
To add program step, select New program step.
Conrm your selection with the forward arrow.
Select Day, Night or Off [if the unit should not be in
operation], set the time for switch on and then for
which days the program applies, then go to End
to nish.
A new program step does not replace a set time
for Day for example, but you can instead select to
change a program step.
To change a program step, select Change
program.
The program steps that should not apply are
removed in Remove program. One or all program
steps can be removed in the menu.
To return to the factory set basic program, select
Reset all.
End Tue 10:45
Mon Tue Wed Thu Fri Sat Sun
Tue 10:45
Mon Tue Wed Thu Fri Sat Sun
New program step 7/16
Tue 10:45
00 :00
Mon Tue Wed Thu Fri Sat Sun
1. 08:00 Day
2. 18:00 Night
3. 10:00 Day
4. 16:00 Night Tue 10:45
Change program
>Installer menu>Week program
Check program
Change program
Remove program
End Tue 10:45
Mon Tue Wed Thu Fri Sat Sun
Tue 10:45
Mon Tue Wed Thu Fri Sat Sun
New program step 7/16
Tue 10:45
00 :00
Mode
Day ►
New program step 7/16
Tue 10:45
>Installer menu>Week program
Week program on/off
New program step
Check program
>Installer menu>Week program
Check program
Change program
Remove program
Remove program
Remove single
Remove all
Reset all
Fan speed increase
Settings for outdoor temperatures for max
respectively min speed during summer
respectively winter modes.
Factory setting
T max speed winter: 14°F [-22-59°F]
T min speed winter: 59°F [14-71°F]
T min speed summer: 71°F [59-98°F]
T max speed summer: 98°F [71-122°F]
Make settings for fan mode [see also Operating
modes section].
Fan settings
>Installer menu>Week program
Week program on/off
New program step
Check program
Week program on/off
• ON
>Installer menu>Week program
>Installer menu
Week program
Fan settings
Heating settings
>Installer menu>Fan settings
Week program
Fan settings
Heating settings
>Installer menu>Fan settings
>Fan speed increase
T max speed winter
T min speed winter
T min speed summer
Week program is activated by selecting On,
under Week program on/off. In On-mode, a sun,
moon or Off in the Status window appears to
indicate day, night respectively Off-function.

schwankgroup.com/schwankair
SchwankAir Controller
1
2
3
4
5
051 01 52 0 25 30
-15 -10 -5 35 40
Diagram: Fan speed increase 5 step
T max speed
summer
T max speed
winter
T min speed
summer
T min speed
winter
Outdoor
temperature [°C]
Fan speed
step
1
2
3
051 01 52 0 25 30
-15 -10 -5 35 40
T max speed
summer
T max speed
winter
T min speed
winter
T min speed
summer
Outdoor
temperature [°C]
Fan speed
step
Diagram: Fan speed increase 3 step

schwankgroup.com/schwankair
SchwankAir Controller
Door over run
Settings for overrun.
In over run mode Auto, controls the over run time
depending on how frequently the door is opened
between openings, according to xed preset
values, according to the table.
Over run mode Fixed time is selected is one wants
xed over run times, the times can be changed
during High speed over run and Low speed over
run.
Factory setting
Over run mode: Auto [Set time]
High speed over run: 30 s [0 – 180 s]
Low speed over run: 120 s [0 – 300 s]
>Installer menu>Fan settings
Fan speed increase
Door over run
Door mode
>Installer menu>Fan settings
>Door over run
Over run mode
High speed over run
Low speed over run
Over run mode
• Auto
>Installer menu>Fan settings
>Door over run
Time between
opening [s]
High speed
over run [s]
Low speed
over run
t < 60 30 90
60 < t < 300 10 300
t > 300 0 180
>Installer menu>Fan settings
>Door over run
Over run mode
High speed over run
Low speed over run
Over run mode
• Fixed time
>Installer menu>Fan settings
>Door over run
Door mode
There are three different door modes to choose
from; Auto, Fixed exible and Fixed open.
In Fixed exible mode, the control function notes
whether the door is open or closed.
In Fixed open mode the door is considered always
open and is only controlled according to Current
stage. In Auto mode, the control automatically
switches between Fixed exible and Fixed open
modes depending on how often the door has
been open.
Factory setting
Door mode: Fixed exible [Fixed open/Auto]
>Installer menu>Fan settings
Door over run
Door mode
Stepless fan
Door mode
• Fixed flexible
>Installer menu>Fan settings
Stepless fan control
Settings for stepless fan control.
Fans are controlled in 3 or 5 steps as standard.
If stepless fan control is selected, the fans can be
controlled steplessly via an external frequency
converter for example.
Factory setting
Stepless fan control: Off [On]
>Installer menu>Fan settings
Door over run
Door mode
Stepless fan
Stepless fan
• OFF
>Installer menu>Fan settings
>Installer menu
Fan settings
Heating settings
Filter guard settings
Make settings for heating.
Heating settings

schwankgroup.com/schwankair
SchwankAir Controller
Outdoor temp. limit
Blocking heating summer time.
Factory setting
Outdoor temp. limit: 59°F [41-86°F]
>Installer menu>Heating settings
Outdoor temp. limit
Eco / Comfort
Open door setp. diff.
Outdoor temp. limit
• 59°F
>Installer menu>Heating settings
Eco / Comfort
Select between Eco and Comfort mode
depending on whether energy savings or optimal
comfort is more important.
Comfort mode gives faster comfort and a slightly
higher output. Comfort mode prioritizes the
temperature comfort, the control system only
accepts a smaller deviation from the set room
temperature.
In ECO-mode several functions and parameter
values are changed, as shown in the display,
which gives lower energy consumption.
For units with internal temperature sensor the
outlet temperature is restricted to 89°F which
further reduces the energy consumption.
Unit with electrical heating
Max heating step is limited.
Unit with water heating
To use the Eco functions it is necessary for the
valve actuator to be controlled by 0-10V.
>Installer menu>Heating settings
Eco / Comfort
• Comfort mode
Eco mode
>Installer menu>Heating settings
Outdoor temp. limit
Eco / Comfort
Open door setp. diff.
Open door setp. diff.
Set by how much the set point value [Room temp.
day/night] is to increase when the door is open.
Factory setting
Set point value difference open door:
3.0K [0K - 10K]
>Installer menu>Heating settings
Eco / Comfort
Open door setp. diff.
Heating step diff.
Open door setp. diff.•
• 3.0 K
>Installer menu>Heating settings
Heating step diff.
Unit with electrical heating
The temperature difference between connection
of the electrical heating step.
Factory setting
Heating step diff: 1.0K [0K – 10K]
>Installer menu>Heating settings
Open door setp. diff.
Heating step diff.
Heating step limit
Heating step diff.•
• 1.0 K
>Installer menu>Heating settings
Heating step limit
Unit with electrical heating
Possibility of limiting the heating.
Factory setting
Heating step limit: 2/3 [1-2/3]
>Installer menu>Heating settings
Heating step diff.
Heating step limit
Sensor calibration
Heating step limit•
• 3
>Installer menu>Heating settings

schwankgroup.com/schwankair
SchwankAir Controller
Sensor calibration
If the sensor displays the wrong values these can
be calibrated. Some display errors may occur,
but this is primarily due to the location [cold/hot
surfaces etc]. The value + or – adds to or subtracts
from the measured value [for example +2K gives
an increase of the displayed value of 2 degrees].
Factory setting
Room temperature sensor: 0.0K [-10K – 10K]
Outdoor temperature sensor: 0.0K [-10K – 10K]
>Installer menu>Heating settings
Heating step limit
Sensor calibration
Stepless heat control
Room temp. sensor
Outdoor temp. sensor
>Installer menu>Heating settings
>Sensor calibration
Room temp. sensor
• 0.0 K
>Installer menu>Heating settings
>Sensor calibration
Stepless heat control
Unit with electrical heating
For stepless control of electrical heating, for
example via external triac.
Unit with water heating
To use Advanced fully, stepless heat control must
be used.
Stepless heat control: ON [Off - not selectable]
>Installer menu>Heating settings
Sensor calibration
Stepless heat control
Control range limit
Stepless heat control
• 3
>Installer menu>Heating settings
>Installer menu>Heating settings
Sensor calibration
Stepless heat control
Control range limit
Stepless heat control
• ON
>Installer menu>Heating settings
Return water temp.
Unit with water heating
If there is a demand for the temperature of the
return water not to exceed a certain value, this
function is activated under Return water temp.
A return water temperature sensor [proximity
sensor, option] must then be installed on the return
water pipe.
Install Return temp. Sensor to Connected and
select max return temperature [59-194°F] using the
turn wheel. During operation, this function limits
the valve’s degree of opening, which reduces the
ow and the return temperature.
Factory setting
Return temp. sensor: Not connected [Connected]
Return temp. limit: Off [59-194°F]
Installer menu>Heating
settings>Return water temp.
Return temp. sensor
Return temp. limit
Return temp. limit
•OFF
Installer menu>Heating
settings>Return water temp.
>Installer menu>Heating settings
Sensor calibration
Return water temp.
Stepless heat control
Installer menu>Heating
settings>Return water temp.
Return temp. sensor
Return temp. limit
Room temp. sensor
•Not connected
Installer menu>Heating
settings>Return water temp.
Connected
Control range limit
The maximum room temperature that a user
can select is limited to between [41-95°F].
Factory setting
Control range limit temperature: 95°F [41-95°F]
>Installer menu>Heating settings
Sensor calibration
Stepless heat control
Control range limit
Control range limit
•95ºF
>Installer menu>Heating settings

schwankgroup.com/schwankair
SchwankAir Controller
External filter guard
Unit with water heating
If an external lter guard, e.g. a pressure switch,
is used, it is activated under External lter guard,
select On.
Factory setting
External lter guard: Off [On]
>Installer menu
Filter timer setting
External filter guard
Last lter change
Last filter change
To check the number of run time hours since the
last lter replacement, select Last lter change.
The time is reset when the lter alarm is reset. If
the time is to be reset before the alarm has gone,
switch the lter timer on and off.
>Installer menu>Filter guard settings
Filter timer setting
External lter guard
Last filter change
>Installer menu>Filter guard settings
Last lter change
0 h
Unit with water heating
Filter alarm is displayed when the set Filter time has
been exceeded or when an external lter guard is
installed and triggered.
Filter timer can be used as a Service interval timer
for electrical heated units when lter is not allowed.
Filter guard settings
>Installer menu
Heating settings
Filter guard settings
External control
Filter timer on/off
Filter alarm is activated by selecting On, under
Filter timer on/off.
Factory setting
Filter timer on/off: Off [On]
Filter timer setting
Under Filter timer setting, set the desired run time
to between 50 and 9950 hours.
Filter timer setting: 1500 h [50 - 9950 h]
>Installer menu>Filter guard settings
Filter timer on/off
Filter timer setting
External lter guard
>Installer menu>Filter guard settings
Filter timer on/off
Filter timer setting
External lter guard
Filter timer setting •
•1500 h
>Installer menu>Filter guard settings

schwankgroup.com/schwankair
SchwankAir Controller
2,8
3,2
4,2
4,6
5,6
6,0
7,0
7,4
8,4
8,8
1 2 3 4 5 6 7 8 9 10 11
4
3
2
1
5
[V]
Diagram: Fan step at incoming 0-10V DC
voltage level, 5 step.
7,2
7,6
5,0
5,4
2,8
3,2
[V]
1 2 3 4 5 6 7 8 9 10 11
3
2
1
Diagram: Fan step for incoming 0-10V DC
voltage level, 3-step.
6,8
7,2
2,8
3,2
1 2 3 4 5 6 7 8 9 10 11
2
1
[V]
Diagram: Heating step for incoming 0-10V DC
voltage level, 2-step.
BMS functions can be activated under External
control. Activate External on/off, 0-10V fan control
or 0-10V Heating control by selecting On under
the relevant one.
External control [BMS]
>Installer menu
Filter guard settings
External control
General settings
>Installer menu>External control
External on/off
0-10V fan control
0-10V heat control
>Installer menu>External control
0-10V fan control
0-10V heat control
Gateway functions
Diagram: Heating step for incoming 0-10V DC
voltage level, 3-step.
7,2
7,6
5,0
5,4
2,8
3,2
1 2 3 4 5 6 7 8 9 10 11
3
2
1
[V]
Unit with electrical heating
Unit with water heating
105
0,5 [V]
100%
50%
5%
Diagram: Stepless heat for incoming 0-10V DC
voltage level

schwankgroup.com/schwankair
SchwankAir Controller
Possibility of making general settings that are also
in the Start-up wizard and execute user reset.
Change the date, time, language and
temperature unit.
General settings
>Installer menu
External control
General settings
Support menu
>Installer menu>General settings
Set date
Set time
Set language
Function test
To test the fan and heating steps, run the
function test.
>Installer menu>General settings
Set temp. unit
Function test
Factory reset
>Installer menu>General settings
Function test
Start test ►
Skip test
>Installer menu>General settings
Function test
Test completed ►
Restart test
>Installer menu>General settings
Fan step 1-5
Heating step off-1
Factory reset
Resets values to factory settings.
>Installer menu>General settings
Function test
Factory reset
Manual system check
Function test
Factory reset
Manual system check
>Installer menu>General settings
Manual system check
Run Manual system check, if required or
after physical alteration of system, to identify
connected units and sensors.
Alarm and error codes
The control has different alarms and error codes
for safe and problem free operation.
If alarms or error codes have been indicated
these must be reset in order to return to normal
operation, for example activating the heating
again. Fan mode is active even when, for
example, the over heating alarm has been
indicated.
Displaying alarm and error codes
In event of alarm or error the alarm/error code
is shown in the status window. In event of alarm/
error code the unit it applies to is displayed.
See Table - Alarms and Table - Error codes
[Quick Guide].

schwankgroup.com/schwankair
SchwankAir Controller
When the fault is rectied, the alarm is reset by
pressing the forward arrow and selecting Reset
alarm and then conrm. At the rst start up alarm
and error codes can occur, these can usually be
reset without action.
A1 Motor alarm
Open main menu ►
Reset alarm
A1 Motor alarm
Open main menu
Reset alarm ►
Reset alarm
Note! Before resetting, check that the fault is
rectified and there is nothing to prevent the unit
from being recommissioned.
If several alarms occur, scroll down to view next
alarm, however the alarms must be reset in the
same order.
A1 Motor alarm
Unit 9
Alarm (1/2)
A2 Over heating alarm
Unit 9
Alarm (2/2)
Power failure
Note that in case of power failure the time
settings need to be checked, if the time is not
set correctly week program will be affected.
Overheat protection
Only applies to units with internal sensor.
The overheat protection is primarily intended to
prevent the unit from overheating and protect the
unit and its surroundings from damages, should an
overheating occur. It will do this by reducing the
power output to keep the internal temperature
within its limits, see table.
If the internal temperature rises above its alarm
limit, an A2 Overheat alarm is triggered and the
fan will start running in order to evacuate the
heat. If the internal temperature continues to
rise despite this, for example because of a faulty
contactor or an incorrect water valve, the fan
speed will increase until full speed is reached and
will continue running until the internal temperature
is reduced and the alarm is reset.
The alarm remains in the display until it is reset. For
electrically heated units the heat will remain off
until then. For water heated units the actuator/
valve will reengage when internal temperature
has fallen to safe levels, even if the alarm is not
yet reset.
For correct function, water heated units must be
equipped with actuator/valve controlled by SIRe.
Electrically heated units are also equipped with a
mechanical over heat protection.

schwankgroup.com/schwankair
SchwankAir Controller
Frost protection function
Unit with water heating
Only applies to units with internal sensor.
The frost protection function is intended to prevent
the water coil from freezing.
When the fan is in operation the valve actuator
opens the valve at an internal temperature below
+59 °F regardless of whether there is a heating
requirement. If the internal unit temperature
continues to drop, e.g. at low ambient
temperatures, insufcient ow line temperatures,
low ow or fault valve function, the frost protection
alarm A3 will be triggered when the internal unit
temperature drops +41°F. The fan then also stops
and when the mixing cabinet is used the dampers
is also closed.
With return temp. sensor connected an advanced
alarm function occurs. At return temperatures less
than +59 °F the actuator will open regardless of
the heat demand. Alarm is triggered at return
temperature +44 °F and the fan also stops.
When the fan is not running there is a heat
retention function that opens the valve when the
water’s return temperature falls below +77 °F
regardless of heat demand.
Note! In event of repeated alarms, overheating
alarms and frost protection alarms, carry out
a thorough check and if the fault cause cannot
be found contact authorised installer or Schwank.
Air curtains Decrease heat Heat off Alarm Start ramp-up Full speed
Unit with water heating 98 ºF 104 ºF 122 ºF 129 ºF
Unit with electrical heating
except 116 ºF 125 ºF 134 ºF 1411 ºF
Overheat protection - temperature limits

schwankgroup.com/schwankair
Wiring Diagram - 4000 Series Controller
- Water Heated Models
7 8 910 1112 15 16 1718 19 20
COM 1 COM 2 ROOM
C2 X5
C1 X4
ROOM X3
Pot. Unit ID
1 2 3 45613 14 21 22
ACTUATOR SUPPLY
N L NL
PE
L
~
230V~
C2 X5
C1 X4
ROOM X3
Pot. Unit ID ACTUATOR SUPPLY
N L NL
PE
L
~
230V~
C2 X5
C1 X4
ROOM X3
Pot. Unit ID ACTUATOR SUPPLY
N L NL
PE
L
~
230V~
+ - + -
CNC
Controller
Controller External
Board
Door Contact
Switch
Room Temp. Sensor
[Optional]
Controller External
Board
Outdoor Temp.
Sensor
Air Curtain PCB
Air Curtain PCB Air Curtain PCB
BLK
GRY
RED
BLK
GRY
RED
BLK
GRY
RED
BLK
GRY
RED
Transformer 24V
Actuator 24V
SDM24 SDM24
BUS
D0
D1
Gnd
SIReWTA
[optional]
*

schwankgroup.com/schwankair
Wiring Diagram - 4000 Series Controller
- Electric Heated Models
7 8 910 1112 15 16 1718 19 20
COM 1 COM 2 ROOM
C2 X5
C1 X4
ROOM X3
Pot. Unit ID
1 2 3 45613 14 21 22
ACTUATOR SUPPLY
N L NL
PE
L
~
230V~
C2 X5
C1 X4
ROOM X3
Pot. Unit ID ACTUATOR SUPPLY
N L NL
PE
L
~
230V~
C2 X5
C1 X4
ROOM X3
Pot. Unit ID ACTUATOR SUPPLY
N L NL
PE
L
~
230V~
+ - + -
CNC
Controller
Controller
External Board
Door Contact
Switch
Controller
External Board
Outdoor Temp.
Sensor
Air Curtain PCB Air Curtain PCB
Air Curtain PCB
BUS
D0
D1
Gnd
*
Room Temp.
Sensor [Optional]

schwankgroup.com/schwankair
SchwankAir Controller
Main menu
Current settings
Current set values.
Main menu
Temperature settings
Day/night temperature. The night temperature is
only valid when the week program is activated.
Fan control
Maximum fan speed and fan speed when the
door is closed.
System on/off
Safety features are still active when the system is
switched off.
Password 1932
Installer status screen
Current settings and functions.
Week program
Activate week program, check, change, add or
erase program.
Fan settings
Fan control and over run functions.
Heating settings
Block heat regarding the outdoor temperature,
activate Eco mode, set point difference open
door, [calibrating sensors], activate return water
temperature sensor [only valid for water supplied
units.
Filter guard settings
Activate lter guard and set service interval.
External control [BMS]
External on/off, fan and heating control 0-10V,
Gateway [modbus]. See "Connecting external
control".
General settings
Language, time, date, function test, manual
system check and factory reset.
Support menu
The support menu is password protected and
is used for support in contact with Frico or
authorised installer.
Installer menu
Alarm and error codes
Reset alarm
Note! Before resetting, check that the fault is
rectified and there is nothing to prevent the unit
from being recommissioned.
Press ► and select reset alarm.
At the rst start up alarm and error codes can
occur, these will usually be reset without actions.
Power failure
Note! A power loss longer than 7 days may
require an adjustment of time and date.
The week program is affected if the clock is
not correctly set.