OSTBERG HERU 1200 S EC, Руководство по установке

Страница: 66 / 72

66
ROTARY HEAT EXCHANGER
The safety switches must be switched off and locked after the unit has been switched
off before starting any service work.
Function:
The rotary heat exchanger is a regenerative aluminium recovery unit that recovers
heat/cooling between the supply and extract air ducts. Outside air and extract air flow
through the rotor in counterflow.
The rotor consists of a large number of small channels, which means that it is very
important to check, clean and care for the rotor and air filter. Stopped or impaired
function may cause considerable heating and/or repair costs.
The rotor is normally selfcleaned by switching the air direction when the rotor goes
in or out of the intermediate plane. The rotor is equipped with a blow-out sector that
prevents the extract air from transfer into the supply air during rotation.
It is important for the blow-out function that the extract air part has a greater under-
pressure than the supply air part. There should be 20–30 Pa greater underpressure on
the extract air side.
Rotormotor, växel samt rotoraxel är permanentsmorda and behöver inte smörjas.
Check:
• That the rotor surface is free of dirt.
• That the rotor can be easily rotates by hand and that there is no noise.
• That the brush strip is intact and tightly secured.
• That the rotor belt is intact, tight and free of cracks/damage.
• That the rotor motor and pulley are undamaged and clean.
Action:
• Before cleaning, first loosen
the rotor belt. Vacuum with
a soft brush while spinning
the rotor manually, or use
compressed air to blow
the area clean.
• To adjust the rotor if it is
not straight, adjust the
height on the underside of
the rotor bar. First unscrew
the centre screw.
Then adjust the height and
retighten the centre screw.
12.8
1270466_utg3_HERU_400_1200_eng.indd 66 2020-10-28 11:59:51
1270466_utg3_HERU_400_1200_eng.pdf 66 2020-10-28 12:04:23