Trane 4TXM2318BF300AA Service Manual page 60

Caution:
• Improper tightening of bolts would lead to the faults shown in the following figure.
Ceiling
pollution
• After tightening the bolts, if there is a clearance between the ceiling and the trim panel, please readjust the height
of the indoor unit.
per motor
Drainpipes
Requirements:
• The drainpipe of the indoor unit should be heat-insulated.
• Heat insulation should be treated for the connection with the indoor unit. Improper heat insulation may cause
condensing.
• The drainpipe with the down gradient of over 1/100 can't be in the S shape, or abnormal sound can be caused.
• The horizon length of the drainpipe should be kept with 20m. Under the condition of long pipes, supports can be
provided every 1.5~2m as to avoid unevenness.
• The central piping should be connected according the following drawing.
• Take care not to apply external force on the connection of the drainpipes.
1.5m~2m
heat
insulating
material
Piping Materials & Heat Insulating Materials
As to prevent condensation, heat insulating treatment should be performed. The heat insulating treatment for piping
should be done respectively.
Piping Material
Heat Insulating Material
• The hose should be used in the horizon direction.
eccentricity adjustment (max.20mm)
Air leakage
Water condensate, water dripping
Clearance is not allowed
support bracket
down gradient
over 1/100
s-shape
elbow
hose clamp
Hard PVC tube VP31.5mm (inner bore)
Vesicant polythene thickness: over 7mm
58
as big as possible (about 10 CM)
VP30
down gradient
over 1/100
hose clamp
hose
hose
indoor unit