Nordic R-09, Installation And Service Manual, Page: 12 / 60

11-May-2021 Page 12 002512MAN-01
Piping
Condensate Drain
The unit comes equipped with one 3/4” female PVC socket
or 3/4” PVC female NPT drain connection. This drain allows the
condensate which forms during the air conditioning cycle to be
removed from the unit. The drain should be connected and
vented as per local codes. During high humidity weather, there
could be as much as 25 gallons of water formed per day.
For vertical R units, the condensate drain is internally
trapped and does not require an external trap. For horizontal
RH units, the condensate drain is not internally trapped,
and an external trap and vent must be installed.
An external condensate pump may be installed if there is
not sufficient drain piping slope possible to drain condensate
under gravity to its destination.
To avoid overflow of the condensate pan, the drain line
and trap should be inspected periodically to ensure they are not
plugged with accumulated debris.
There is an alarm for condensate overflow, which will disa-
ble unit operation.
See following pages for diagrams showing the condensate
drain connection.
Outdoor Loop
The connections for the Outdoor Loop are 1/2” or 3/4”
brass female NPT. They are labelled OUTDOOR IN and
OUTDOOR OUT.
See the following page for an illustration of a building loop
installation, and also the following chapters for details on ground
loop and open loop installations.