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Preheater
Topvex SC, Topvex TC
Installation instructions
Document in original language | 247019 · A001
GB
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© Copyright Systemair AB
All rights reserved
E&OE
Systemair AB reserves the rights to alter their products without notice.
This also applies to products already ordered, as long as it does not affect the previously agreed specifications.
247019 | A001
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1 Warnings. .. ....... .... ..... .... ..... .... ..... .... ......... .... .1
2 General... .... ..... .... .... . .... .... ..... .... ......... .... ..... .1
3 Installation.. .... ..... .... ..... .... ......... .... ..... .... ..... ..1
3.1 Outdoor air sensor.... .... ......... .... ..... .... ....1
3.2 Wiring diagram . ..... .... ..... .... .... ..... .... ..... .2
4 How to set up the function . ..... .... ......... .... ..... .... 3
4.1 Activation.. .... ..... .... ..... .... ......... .... ..... ...3
4.2 Configuration .... ......... .... ..... .... ..... .... .....4
4.3 Allocation . .... ..... .... ..... .... ......... .... ..... .... 5
4.4 Operation settings ... ..... .... ..... .... .... . .... .... 7
4.5 Save commissioning settings . .... ......... .... ..7
Contents
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Warnings
PHS
OS
EF
SF
HE
PH
|
1 Warnings
Danger
• Make sure that the mains power supply to the unit is disconnected before performing any maintenance
or electrical work!
• All electrical connections must be carried out by an authorized installer and in accordance with local rules
and regulations.
2 General
A preheater is available as an accessory for Systemair Topvex SC, Topvex TC. Install the preheater in the outdoor duct
to prevent icing in the heat exchanger, compensate for loss of heating capacity during by-pass defrosting or to supplement the heating capacity during colder conditions.
The kit contains of 1 preheater, 1 outdoor air sensor and 1 instruction.
3 Installation
3.1 Outdoor air sensor
Mount the enclosed outdoor air sensor to the outdoor air duct (OS in figure 1).
Replace the existing OS-label inside the air handling unit with the new PHS-label. Attach the new OS-label next to the
added outdoor air sensor.
1
Fig. 1
OS
PH
PHS
EF
SF
HE
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Outdoor air
Supply air
Extract air
Exhaust air
Outdoor air sensor
Preheater
Preheater temperature sensor
Extract air fan
Supply air fan
Heat exchanger
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| Installation
ACCESS
0V
9
10
11
12
AO4
REF
DI6
REF
UI4
CB 250-90-3-MQXL
CB 315-90-3-MQXL
CB 400-120-3-MQXL
T74
T27T84
PE
L3
L2
L1
PE
L3
L2
L1
N
400V 3N~
OS
*
ACCESS
1
2
G0
Y
PE
L3
L2
L1
PE
L3
L2
L1
7
8
N
400V 3N~
RB 50-25-12-MQXL
RB 50-30-17-MQXL
RB 60-30-17-MQXL
RB 60-40-21-MQXL
RB 60-50-27-MQXL
OS
*
0V
AO4
REF
DI6
REF
UI4
T74
T27T84
2
3.2 Wiring diagram
Fig. 2 Wiring CB
Fig. 3 Wiring RB
* See chapter 3.1
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4 How to set up the function
Log in with service mode using password 0612.
Overview:
Service
0612
Login
Step by step:
How to set up the function |
3
1.
2.
3.
4.
Open the log in window
Select service from drop down list
Type in password 0612
Press Login.
4.1 Activation
Activate the Preheater function by selecting Yes as Preheater in the list of available functions in the Configuration > Functions > Function activation menu.
Overview
Configuration > Functions > Function
activation
Preheater
Step by step:
22 Sept 12:43
Yes
1.
2. Select Functions
3. Select Function activation
4. Select Yes as Preheater
Select Configuration from the navigation icons
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| How to set up the function
4
4.2 Configuration
Configure the preheater and its running mode in the Configuration > Functions > Preheater menu.
Note:
Select When defrosting if preheater is used to maintain supply air temperature at desired level only
during by-pass defrosting (Pressure monitoring).
Select Unit running if preheater is used to prevent icing in the exchanger or to support section defrosting
or heating capacity in very cold climates.
Overview
Configuration > Functions > Preheater
Preheater function
Type of preheater
Preheater temperature sensor
Start/Stop function
Type of feedback
Step by step:
1.
2. Select Functions
3. Select Preheater
4. Select Preheating as Preheater function
5. Select Electric as Type of preheater
6. Select Preheater temperature as Preheater temperature sensor
7. Select When defrosting (see note) or Unit running (see note) as Start/Stop function
8. Select Alarm as Type of feedback
Select Configuration from the navigation icons
22 Sept 12:43
Preheater temperature
When defrosting, Unit running
Preheater
Electric
Alarm
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How to set up the function |
4.3 Allocation
Configuration > I/O allocation settings
Select I/O (in-/output) placement for the connected temperature sensor and control/feedback signals to/from the electric heater in the Configuration > I/O allocation settings submenus.
Caution
Do not use the same in- or output for several functions.
Overview:
5
Configuration > I/O allocation settings >
Analog inputs
Analog inputs
Intake air temperature
Preheater temperature
Configuration > I/O allocation settings >
Digital inputs
Digital inputs
Feedback preheater
Configuration > ... > Digital inputs> Feedback
preheater
Name
Original name Feedback preheater
Contact function
22 Sept 12:43
Device Position
Controller AI4
PDT2 UI1
22 Sept 12:43
Device Position
Controller DI6
22 Sept 12:43
Feedback preheater
Normally closed
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Configuration > I/O allocation settings >
Analog outputs
Analog outputs
Preheater Controller AO4
22 Sept 12:43
Device Position
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| How to set up the function
6
Step by step:
1.
2. Select I/O allocation settings
3. Select Analog inputs
4. Allocate Intake air temperature to AI4
5. Allocate Preheater temperature to UI1 on Controller
6. Go back to I/O allocation settings (use the navigation path Configuration > I/O allocation
7. Select Digital inputs
8. Allocate Feedback preheater to DI6
9. Select Feedback preheater
10.Adjust Contact function to Normally closed
11.Go back to I/O allocation settings (use the navigation path Configuration > I/O allocation
12.Select Analog outputs
13.Allocate Preheater to AO4
14.Go back to I/O allocation settings (use the navigation path Configuration > I/O allocation
Select Configuration from the navigation icons
settings)
settings)
settings)
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How to set up the function |
4.4 Operation settings
Data & Settings > Temperature control > Preheater
Adjust the preheater temperature set point in the Data & Settings > Temperature control > Preheater menu
Note:
When defrosting:
To maintain a supply temperature during by-pass defrosting the preheater need to compensate for the
missing heating capacity. E.g. if the desired supply air temperature is 22 °C, but the heating capacity is only
10 °K the preheater setpoint need to be set to 12 °C.
Unit running:
Example A: To prevent any ice build-up in the exchanger the preheater setpoint need to be 0 °C
Example B: In very cold climates the preheater setpoint need to equal the outdoor temperature used for
dimensioning the unit’s heating capacity. E.g. If the unit is dimensioned for outdoor temperatures down to
-18 °C but outdoor temperatures in this location may be even lower the preheater setpoint need to be
-18 °C.
Overview:
7
Data & Settings > Temperature control >
Preheater
Setpoint preheater
Step by step:
1.
2. Select Temperature control
3. Select Preheater
4. Adjust Setpoint preheating to the desired temperature setpoint.
Select Data & Settings from the navigation icons
22 Sept 12:43
-18 °C
4.5 Save commissioning settings
When the installation is complete and all functions are tested it is recommended to save a local backup of the current
configuration in the control unit.
Select Yes on Save commissioning settings in the Configuration > System settings > Save and restore
settings menu.
Overview:
Configuration > System settings > Save and restore
settings
22 Sept 12:43
Save commissioning settings
Step by step:
1.
2. Select System settings
3. Select Save and restore settings
4. Select Yes on Save commissioning settings.
Select Configuration from the navigation icons
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Yes
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Systemair Sverige AB
Industrivägen 3
SE-739 30 Skinnskatteberg, Sweden
Phone +46 222 440 00
www.systemair.com
Preheater · Installation instructions · 247019 · en_GB · 2020-10-07 · A001
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