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HRV/ERV H 120(170)
SET THE THREE-POSITION SWITCH INTO THE STAND BY POSITION
TO ACTIVATE THE REMOTE CONTROL.
3. Humidistat.
The humidistat is used for indoor humidity control. When indoor humidity level rises above the set point, the unit changes into the High Speed Mode and
runs with the high speed until the humidity level falls down below the set point. The humidity set point is adjustable.
4. Remote mechanical timer.
In case of the timer activation the unit changes into the High Speed Mode.
5. Switch.
In case of the switch contact closing the unit changes into High Speed Mode and reverts to permanent Low Speed Mode when the switch contacts are
opened.
SERVICING AND MAINTENANCE
Servicing of the unit is required 3-4 times per year. Besides general cleaning, the following operations are required:
1. Filter maintenance (3-4 times per year)
Dirty filters increase air resistance in the system and reduce supply air flow to the premises.
Clean or replace the filters as often as required, but at least 3-4 times per year. Clean the filter with running water or a vacuum cleaner.
After two cleaning replace the filter. Contact your local supplier for new filters.
2. Heat recovery core maintenance (once per year).
Some dust can get accumulated on the heat recovery core block even if you clean or replace the filters regularly in compliance with above procedure. To
maintain the high heat exchange efficiency, pull out and clean the heat recovery core with warm detergent solution. Re-install the dry heat recovery to
the unit.
3.
Fan maintenance (once per year).
Even if you perform regular maintenance of the filters and the heat recovery core, some dust and grease can get accumulated inside the fans and
reduce the fan performance and supply air flow.
Clean the fans with a soft brush or dry cloth. No water and abrasive detergent, sharp objects or solvents are allowed for cleaning to prevent the
impeller damage.
4.
Condensate drainage system maintenance (once per year), (applicable only for HRV H 120(170).
The drain hose can get clogged with the extracted particles. Clean the drain hose is required. Check proper functioning of the drain system by
pouring some water into the drain pan at the unit bottom. Clean the U-trap and the drain tubes if required.
5.
Supply air flow inspection (twice per year).
Leaves and other objects can clog the intake grille and decrease the unit performance and supply air flow. Check the intake grille twice per year
and clean it if required.
6.
Air ductwork maintenance (once in 5 years).
Even if you fulfill all the above maintenance guidelines regularly, a certain amount of dust is accumulated inside air ducts. That reduces the
ventilation system performance. Clean or replace the air ducts periodically.
TROUBLESHOOTING
Problem
Possible reasons
Solving
The fan(s) do(es)
not start running.
Power supply is off.
Make sure the power supply line is connected correct, otherwise troubleshoot the
connection error.
Thermal fuse is melted.
Disconnect the unit from power mains. Remove the overload. Replace the thermal fuse
and check the unit.
Cold supply air.
The extract filter is clogged.
Clean or replace the extract filter.
The heat recovery core is
frozen.
Check the heat recovery core condition. Shutdown the unit and turn it on after the
freezing danger is no longer imminent. Check the thermostat setpoints.
Low air capacity.
Too low set rotation speed.
Check the speed control settings.
The filters, fans or heat recovery
core are clogged.
Clean or replace the extract filters; clean the fans and the heat recovery core.
The ventilation system is
clogged or damaged.
Check the diffusers and louvre gravity shutters opening, check the exhaust hood and
intake grille and clean those if required; make sure that the air ducts are not clogged or
damaged.
Noise, vibration.
The impeller(s) is (are) clogged. Clean the fan impeller(s).
Fan screw tightening is loose.
Check and tighten the screws if required.
Water leakage.
The drain system is clogged,
damaged or wrong arranged.
Clean the drain pipe is required. Check the drain pipe slope, U-trap and temperature
conditions.
