8
MOUNTING AND STARTUP
Threaded dowel pin
Nut
Washer
Fixing bracket
Vibration-absorbing
rubber
Nut and lock-nut
UNIT MOUNTING
The unit is designed for suspended mounting by means of the threaded rod xed in the threaded dowel pin.
To attain the best performance of the unit and to minimise turbulence-induced air pressure losses while mounting connect a straight air
duct section on both sides of the unit.
The minimum straight duct section length must be equal to one air duct diameter on air intake side and three times diameter on air exhaust
side.
If the air ducts are not connected or the connected air ducts are too short, protect the unit parts from ingress of foreign objects by covering
the spigots with a protecting grille or other protecting device with mesh width not more than 12.5 mm to prevent uncontrollable access to
the fans.
SAFETY PRECAUTIONS
The unit is designed for mounting on a rigid and stable structure.
The unit is mounted with anchor bolts. Make sure that a mounting construction has sucient load capacity matching the unit weight.
Otherwise reinforce the installation place by beams, etc.
If the threaded bolts used for the unit mounting are too short, the unit can generate abnormal noise and resonate with the ceiling. The
suspended bolts must be long enough to prevent resonating.
If the unit connection place to the spiral seam duct is supposed to be the source of abnormal noise, replace the spiral seam air duct with
the exible one. Optionally the exible connectors may be used to prevent resonating.
CONDENSATE DRAINAGE
The condensate drain pan in the heat
recovery section is equipped with hoses for
removal of the condensed uid outside the unit.
Connect the pipe, U-trap (not included in
delivery package) and sewage collection system
with metal, plastic or rubber connecting pipes.
The pipe slope downwards must be at least 3°.
Fill up the system with water before connecting
the unit to the power mains! The U-trap must
always be lled with water during the unit
operation. Make sure that the water ows freely
into the sewage collection system or otherwise
condensed water may build up in the unit
during the heat exchanger operation and cause
equipment failure and condensed water outow
into the premises.
The condensate drainage system is
designed for normal operation in premises with
air temperatures above 0 °C. If the expected
ambient air temperatures are below 0 °C the
condensate drainage system must be equipped
with heat insulation and pre-heating facilities.
Pipe
U-trap
Sewage system
min 3°
Pipe
Pipe
U-trap
Sewage system
Pipe
Drain pipe
Drain pipe
min 3°
DO NOT CONNECT SEVERAL DRAIN PIPES FROM SEVERAL AIR
HANDLING UNITS TO ONE UTRAP!
DIRECT CONDENSATE OUTSIDE WITHOUT CONNECTION TO DRAIN
SYSTEM IS NOT ALLOWED!
