Unit Installation
Page 9
mrcool.com
The drain pan has a primary and secondary drain connection. Condensate removal is performed by
attaching a 3/4 in (19 mm) pipe to the evaporator coil drain pan and is terminated in accordance with
local or state plumbing/HVAC codes. The installation must include a “P” style trap that is located close to
the evaporator coil.
DO NOT
overtighten the drain connection as this could damage or distort the
drain pan and cause condensate leakage.
Please refer to the guidelines and illustration below to best
determine how and where to run the condensate drain pipe
DO NOT
connect the condensate drain pipe into a waste pipe or other pipelines which are
likely to produce corrosive fumes or an odor. Connecting to these pipes could cause the
fumes or odor to enter indoors and/or corrupt the unit.
DO NOT
connect the condensate drain pipe into a rain pipe, as this could cause rain water
to enter the unit and cause property damage and/or personal injury.
The condensate drain pipe should be connected into a drain system specifically for the unit.
Screw Connection
C
onnect the pipe to the unit. Follow all instructions below. Use both a spanner and torque wrench. When
connecting the tapered screw nut, first apply Polyolester oil (POE oil) on its inner and outer surface. Then,
screw the first 3 or 4 threads by hand. Next, tighten the nut with the spanner and torque wrench. Confirm
the tightening torque by referring to the following table.
DO NOT
overtighten the nut as it could damage
it and cause the connection to leak.
Keep pipe connection exposed to perform the leak test.
Pipe diameter (inch)
Tightening torque: ft-lbs (N·m)
1/4 in
11-22 ft-lbs (15-30 N·m)
3/8 in
26-30 ft-lbs (35-40 N·m)
1/2 in
33-37 ft-lbs (45-50 N·m)
5/8 in
44-48 ft-lbs (60-65 N·m)
3/4 in
52-55 ft-lbs (70-75 N·m)
7/8 in
59-63 ft-lbs (80-85 N·m)
3.5 Condensate Removal
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Содержание MDUCC15024
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