McQuay 5RT90BR Montageanleitung Seite 19

G Unit Conversion
In the case of converting standard unit to downthrow unit, follow the steps as stated below:
5RT90,120,150,180,210 & 250BR
1 1
Ñ Ñ Ñ
Remove the
side panel
4 4
Cover the horizontal
return opening with the
cover and screw tightly.
Unscrew the vertical return
Refer Note 2.
cover from the base panel
Lastly, install back the side panel.
Install back the pulley belt. Adjust the belt tension. Lastly, install back the side panel. Refer Note 1.
For downthrow conversion, belt length need to be changed.
For unit with standard pulley, belt length
Shaft to shaft distance for downthrow, C-C = b mm
5RT90BR
a 1382
b 375
Sealant such like gasket (fi eld supply) shall be placed in between the metal cover and fl ange. Besides that, weather-
proof silicone shall be applied on all the joints, screw holes and gaps to ensure water-tight condition.
Refer Engineering Data Book for blower curve and technical data of variable pitch pulley.
Remove the
Pulley Belt
For 5RT90BR:
The two side plates are screwed
on the blower support as shown
Install back the pulley
belt. Adjust the belt
tension by moving the
motor base.
Remove the side
panel at return side
= a mm
5RT120BR 5RT150BR
1357 1250
388 375
2 2
Ç Ç Ç
For 5RT120,150,180,210 & 250BR
The two downfl ow structure
are screwed to blower
3 3
É É É
Turn the blower to face bottom.
Screw at both sides.
5RT180BR 5RT210BR
1382
445
Remove screws
at both sides
Detached
blower
Detached the
blower support
Cover the
horizontal supply
opening with the
blower support
that detached
from the blower
and screw tightly.
Refer Note 2.
5RT250BR
1382 1382
445 435
17