Drain Piping - andrews WHC56 Installation And Service Manual

13.

Drain Piping

Drain pipe
• This product is a highly-efficient latent heat collection device and drain water is discharged from the
drain discharge port during combustion (max discharge: about 100cc/min). Be sure to perform drain
piping.
• Use indirect water discharge when connecting the drain pipe from the device to a rainwater pipe. Do not
install a trap.
• Use indirect water discharge when connecting the drain pipe from the device to a sewage water pipe or
other drainage pipes and be sure to install a trap to prevent foul odors. (Take caution as there may be
odor when leaving the device unattended for a long period of time)
• The specified drain pipe size is R1/2". Do not narrow the diameter of the drain pipe in the middle.
• Use plastic pipe, such as PVC, for the drain line. Do not use steel, black iron, or any other material which
can corrode when placed into contact with water.
• Keep the drain pipe length to a minimum.
Install the pipe with a decline when horizontally
pulling the pipe in the middle.
• The end of the drain pipe must be released in to the air.
Be sure the pipe is not submerged in water. In addition,
take measures to prevent clogging of the pipe.
• After performing piping, check to make sure drain water
is properly drained. (In the case of normal hot water use,
drainage starts in about 15 minutes. However, the time
may vary depending on the season and other conditions.)
• Use tape or packing, etc. to the connection part of the
drain pipe.
Some of the seal material may damage the resin.
• Take measures to prevent the condensate drain lines from
freezing (insulation, heat tape, electric heaters, etc.).
22
Contact an authorized office of the area when requesting
work and be sure to follow sewage laws.
Condensate pipeing to floor drain
DO NOT ADD
ANY VALVES
Slope pipe
downwards 1/50.
Floor drain
1/2" PVC pipe
The end of the drain pipe
must have an air gap.
MAINTAIN CLEARANCE
(More than 30mm.)