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Maxi 1100-2000
Operation- and maintenance instructions
204414
Systemair AB
2
2
Warning
In order to avoid electrical shock, fire or other damage that might occur in connection with faulty use and
operation of the unit, it is important to consider the following:
The system must be installed according to the installation description.
Insulate mains supply before service or cleaning of the heat recovery unit.
Tumble dryer must not be connected directly to the ventilation system.
Make sure the filter is mounted in its place before running the system.
Maintenance must be performed according to the instructions.
Maintenance
Maintenance of the MAXI should normally be carried out 3 – 4 times a year. Apart from general cleaning
the following should be observed:
NOTE! For the Maxi 1100 both the inspection doors are fastened to the unit casing by 8 toggle
locks. The two inspection doors are connected between themselves with hinges. When the unit
is installed with the doors facing down make sure that the inspection doors are only opened one
at the time (4 toggle locks), never open all of the 8 toggle locks at the same time unless you want
to remove both the inspection doors.
1. Changing Supply/Extract air filter, indicates as “Filter guard” in the control panel (fig.3 and 4).
The bag filter cannot be cleaned and must be changed as necessary. New filters can be ordered from
Systemair. Pressure guards monitor Supply and Extract air filters.
Initial pressure drop is approx.: Maxi 1100 90Pa and Maxi 2000 140Pa and the final pressure drop is
approx. 200-220Pa for all sizes.
2. Checking the heat exchanger (Once a year), (fig.3 and 4).
After long times use dust may build up in the exchanger and block the airflow. It is vital to clean the
exchanger regularly to maintain high efficiency. The heat exchanger can easily be taken out of the unit.
Wash in hot soapy water or use pressure air. Do not use detergent containing ammonia.
3. Checking the fans (once a year), (fig.3 and 4).
Even if the required maintenance, such as changing of filters is carried out, dust and grease may slowly
build up inside the fan (pos.1 and 2 in fig. 3 and 4). This will reduce the efficiency.
The fans may be cleaned with a cloth or a soft brush. Do not use water. White spirit can be used to
remove obstinate settlements. Allow drying properly before remounting.
4. Cleaning extract louvers and inlet diffusers (when necessary)
The system supplies outdoor air to the building and extracts the used indoor air via the duct system and
diffusers/louvers. Diffusers and louvers are mounted in ceilings/walls in bedroom, living room, wet
rooms, WC etc. Remove diffusers and louvers and wash in hot soapy water as required.
(Diffusers/louvers must be put back with their original settings and positions in order not to unbalance
the system).
5. Checking the outdoor air intake
Leaves and pollution could plug up the air intake grille and reduce the capacity. Check the air intake
grille at least twice a year, and clean if necessary.
6. Checking the duct system (when necessary)
Dust and grease settlements may build up in the duct system even if filters are changed regularly. This
will reduce the efficiency of the installation. The duct runs should therefore be cleaned/ changed when
necessary. Steel ducts can be cleaned by pulling a brush soaked in hot soapy water, through the duct
via diffuser/louver openings or special inspection hatches in the duct system (if fitted).
NOTE!
In addition roof cowl must be checked once a year and cleaned as necessary.
