York HIC4008B21S Installation And Maintenance Manual page 23

g. Installing Main Condensate Piping
• Install the main condensate pipe on a downward slope to make sure that it is lower than each
rising part of the condensate pipe from the indoor unit.
• The size for main condensate pipe must be larger than VP30, the nominal diameter size of
1-3/16 inches (30mm) and, outer diameter 1-1/2 inches (38mm) according to the number of the
connected indoor units.
● Do not allow condensate piping to rise above the
level of the drainage basin in the unit, away from
the unit. Otherwise, moisture will settle back into the
unit with the hazard of spillover when the unit has
stopped.
● Do not hook up to sanitary condensate lines.
Connect to storm sewer lines.
5. Drainage and Water Leakage Check
After performing the condensate piping work and the electrical wiring work, check to ensure that water
flows smoothly according to the following procedure.
● Drainage Operation by Float Switch
The following is regular procedure to check float switch operation:
▫ Turn ON the power supply.
▫ Pour 50 to 67oz (1.5 to 2 liters) of water gradually into the condensate pan.
▫ Check to ensure that the water flows smoothly inside the transparent condensate piping and
drained at the pipe end, and that no moisture leakage occurs.
▫ If the end of the condensate pipe cannot be checked visually, pour another 50 to 67oz (1.5 to 2
liters) of water to the condensate pan. If the water overflows from the condensate pan, there might
be some failure inside the condensate pipe. Inspect the condensate pipe.
In Case of Pouring Water through Air Outlet
Insert the end of the hose
between the heat exchanger
and the condensate pan.
Be careful that water does not splash onto electrical components such as the fan motor, float
switch, or thermistors.
P5417054
1/25 to 1/100
Downward Slope
Condensate Piping
Main Condensate Piping (Min. VP30)
of Unit Side
(Downward Slope from Rising Part)
NOTICE
Condensate Pan
Pump
Water: 50 to 67 oz
Min. 3-15/16 inches (100mm)
(higher as possible)
Use PVC with VP25
This condensate pipe shall be
separating from other pipes.
Rising Part
Incorrect Installation of Condensate Piping
( 1.5 to 2 liters)
Upward Slope
Vinyl Tape Condensate Hose
(Accessory)
for Checking Drainage
(Transparent)
Position for Checking Drainage
19