System air Topvex SC Troubleshooting guide

Document in original language | 214959 · A004
Air Handling Unit
Topvex SC, TC
Operation and Maintenance Instructions GB

214959 | A004
© 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.

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Contents
1 Overview ......................................................1
1.1 Intended use .........................................1
1.2 Disclaimer ............................................1
1.3 Warranty..............................................1
2 Warnings.......................................................1
3 Warnings signs on product ................................2
4 Product description..........................................3
4.1 Supply and extract air fans .......................3
4.2 Pressure transmitter fans/filters ................3
4.3 Supply and extract air filters......................3
4.4 Heat exchanger .....................................3
4.5 Temperature sensor................................3
4.6 Water heating coil ..................................3
4.7 Electric heating coil.................................3
4.8 Internal components position....................4
4.9 Access control cabinet.............................6
5 Start up.........................................................7
5.1 NaviPad ...............................................7
6 Operation .................................................... 11
6.1 Controller settings ................................ 11
6.2 Advanced HMI (Human Machine
Interface) Settings ................................ 17
6.3 No communication ............................... 18
7 Maintenance ...... ............. ........... ........... ....... 19
7.1 Maintenance intervals ........................... 19
7.2 How to replace supply/extract air
filter..................................................20
7.3 How to clean NaviPad ........................... 20
7.4 How to clean the heat exchanger............. 20
7.5 How to clean the fans ........................... 21
7.6 How to clean hot water heating
coil....................................................21
7.7 How to clean the electric heating
coil....................................................22
7.8 How to clean the extract air louvres and
inlet diffusers ...................................... 22
7.9 Clean the outdoor air intake.................... 22
7.10 How to clean the duct system ................. 22
7.11 Where to reset tripped fuses................... 23
7.12 How to reset the manual overheat
protection (EL units).............................. 23
7.13 How to replace the fan module................ 24
7.14 How to replace the heat
exchanger .......................................... 24
7.15 Change the internal battery in control
unit CU27–C ........................................ 29
8 Troubleshooting............................................ 30
9 Alarms........................................................31
9.1 Alarm list............................................ 31
10 Service .......................................................32
11 EU Declaration of Conformity ........................... 33
12 General conditions......................................... 34
12.1 Standard tools .................................... 34
12.2 Spare parts and reference
documentation .................................... 34
13 Spare parts .................................................. 34

Overview |1
1 Overview
This manual includes the information required. If other accessories not included at delivery are in use, read their sepa-
rate instructions. The key to proper and safe operating is to read this manual thoroughly, use the air handling unit ac-
cording to given guidelines and follow all safety requirements.
1.1 Intended use
The air handling units are intended to provide ventilation and depending on settings, heat recovery, air heating or free
cooling. Topvex SC, TC are meant for indoor installation.
Sound levels exceeding 70 dB(A) may occur depending on model and size (see online catalogue at www.systemair.
com for detailed information).
1.2 Disclaimer
The manufacturer may not be held liable for any damage to people or property caused by improper installation, start-
up, use of the unit or failure to implement the procedures and instructions included in this manual.
1.3 Warranty
General conditions are applied if purchase contract not state otherwise.
These units are delivered complete, tested and ready for being operated. Any form of warranty will become null and
void in the event that the unit is modified without manufacturer’s authorisation. Carry out all the planned maintenance
according to Operation and maintenance instruction in a timely and proper way.
Wear parts are not covered by the warranty.
2 Warnings
The following admonitions will be presented in the different sections of the document:
Danger
• Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death or
serious injury.
Warning
• Indicates a potentially hazardous situation that may result in minor or moderate injuries.
Caution
• Indicates a risk of damaging the product or prevent optimal operation.
Important
• This appliance can be used by children aged from 8 years and above and persons with reduced physical,
sensory or mental capabilities or lack of experience and knowledge if they have been given supervision
or instruction concerning use of the appliance in a safe way and understand the hazards involved.
• Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children
without supervision.
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2| Warnings signs on product
3 Warnings signs on product
Warning signs located on the air handling units.
Fig. 1 Disconnect all supply circuits before access to terminals
Fig. 2 Rotating fan during 4 minutes rundown period
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Product description | 3
4 Product description
4.1 Supply and extract air fans
The fans have external rotor motors of EC type which are steplessly controlled individually by setting the control signal
to a fixed value. It is possible to program the speed in 3 steps (high/normal/low) depending on the programming of the
week schedule. The motor bearings are maintenance free. It is possible to remove the fans for cleaning, see chapter 7
for more information.
4.2 Pressure transmitter fans/filters
Two pressure transmitters are installed, each of the transmitters has two sensors. One sensor measure the differential
pressure over the inlet cone of the fan impellers to maintain the airflow at constant level (CAV function as standard).
The other sensor measure the differential pressure over the supply and extract air filters. When the pressure drop rea-
ches the set value, an alarm is triggered in Access control unit, which indicates that the filter needs to be replaced.
4.3 Supply and extract air filters
The filters are of bag filter type with filter quality ePM1 60% (F7) for the supply air filter and ePM10 60% (M5) for the
extract air filter. The filters need to be replaced when polluted. We recommend ordering original filters from Systemair.
4.4 Heat exchanger
Topvex SC, TC models are equipped with a counter flow heat exchanger and a by-pass damper. The operation of the
by-pass damper is automatic and depends on the set temperature or if defrosting is in operation.
For defrosting a pressure transmitter is installed which measure the differential pressure over the heat exchanger.
4.4.1 VDI 6022 Hygiene standard
If an operation stop of the air handling unit for more than 48 hours is planed, we advise against using cooling recovery.
This is to avoid microbial growth in eventual condensation water in the supply air.
4.5 Temperature sensor
4 temperature sensors (PT1000) are included in the unit from factory. The sensors are as follows:
• Supply air sensor
• Extract air temperature sensor
• Outdoor air temperature sensor
• Exhaust air temperature sensor
• Efficiency temperature sensor
The supply air sensor is loosely delivered with the unit and needs to be installed in the supply air duct externally from
the unit. See Installation instructions for more information.
4.6 Water heating coil
In air handling units with built in water heating coil the hot water coil is located next to the supply air connection. The
hot water coil can be either HWL (hot water coil, low power) or HWH (hot water coil, high power). The coil material is
copper piping with a frame of galvanized sheet steel and aluminium fins. The coil is equipped with venting and immer-
sion sensor for frost protection.
4.7 Electric heating coil
In air handling units with built in electrical heater the heating rods are located after the supply air fan in the airflow di-
rection. The material is stainless steel. The electrical heating coil has both automatic and manual overheating protec-
tion. Reset the manual overheat protection by pushing the red button on top of the electrical heater frame (figure 9).
The electrical heater is mechanically interlocked by an air flow sensor in the supply air. The power demand of the elec-
tric heating coil is controlled by Access control unit. The heat is controlled steplessly by a TTC triac control according to
the selected control function that is set in NaviPad control panel.
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4| Product description
4.8 Internal components position
4.8.1 Topvex SC
Fig. 3 Left hand unit
Supply air Exhaust air Outdoor air Extract air
Position Description
1Fan supply air
2 Fan extract air
3Filter supply air
4Filter extract air
5Heat exchanger
6Access control cabinet
7Damper by-pass outdoor air/Section defrosting (only units with section defrosting)
8Control box for section defrosting (only for unit with section defrosting)
9Internal electrical cabinet
10 Heating coil (EL or HWH/HWL)
11 Pressure transmitter supply air fan/extract air filter
12 Pressure transmitter extract air fan/supply air filter
13 Pressure transmitter defrosting exchanger
14 Air flow sensor (only for units with electric heating coil)
15 Condensation drain, outdoor air
16 Condensation drain, extract air
17 Water battery connection
18 Extract air temperature sensor (ETS)
19 Efficiency temperature sensor (EFS)
20 Outdoor air temperature sensor (OS)
21 Exhaust air temperature sensor (EHS)
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Product description | 5
4.8.2 Topvex TC
Fig. 4 Left hand unit
Supply air Exhaust air Outdoor air Extract air
Position Description
1Fan supply air
2 Fan extract air
3Filter supply air
4Filter extract air
5Heat exchanger
6Access control cabinet
7Damper by-pass outdoor air/Section defrosting (only units with section defrosting)
8Control box for section defrosting (only for unit with section defrosting)
9Internal electrical cabinet
10 Heating coil (EL or HWH/HWL)
11 Pressure transmitter supply air fan/extract air filter
12 Pressure transmitter extract air fan/supply air filter
13 Pressure transmitter defrosting exchanger
14 Air flow sensor (only for units with electric heating coil)
15 Condensation drain, outdoor air
16 Condensation drain, extract air
17 Water battery connection
18 Extract air temperature sensor (ETS)
19 Efficiency temperature sensor (EFS)
20 Outdoor air temperature sensor (OS)
21 Exhaust air temperature sensor (EHS)
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6| Product description
4.9 Access control cabinet
Danger
Disconnect the mains power supply to the unit before moving the Access control cabinet or opening the lid.
Warning
Before obtaining access to terminals, all supply circuits must be disconnected.
Access control cabinet is mounted on top of the unit. It is possible to remove the cabinet and mount it in a suitable loca-
tion, a control cabinet kit is available as an accessory.
The enclosure class for Access control cabinet is IP44. The dimensions are; length 450 mm, width 230 mm, height 92,5
mm.
Use one of the three flanges on the control cabinet to install accessories. If there is a need to change the type of flange
on one position, it’s possible to order additional flanges from Systemair. If Access control cabinet is mounted in an ex-
posed environment and a higher enclosure class is required, order a flange suitable for cable glands and replace the ex-
isting one (3).
Fig. 5
Position Description
1Control unit CU27–C
2Terminals
3Flange
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