Install The Connecting Pipe - Rinnai DONSR20Z9 Operation & Installation Manual

INSTALLATION OUTDOOR
While installing the outdoor unit, pay attention to the installation place and the drainage pattern;
if it's installed at the alpine zone, the frozen condensed water will block up the water outlet, please
pull out the rubber stopper of the reserve water outlet. If that still fails to satisfy for the water
CAUTION
draining, please knock open the other two water outlets, to allow the water to drain.
Pay attention to the knockout the reserve water outlet from outside to inside, as it will be beyond
repair after knocking open. Please pay attention to the installation place, lest cause inconvenience.
Please vermin proof for the knocked out hole, to avoid the pest ingress and damage to the
components.

19. INSTALL THE CONNECTING PIPE

Check whether the height drop between the indoor unit and outdoor unit, the length of refrigerant pipe, and the
number of the bends meet the following requirements:
19.1 Refrigerant piping
Please pay attention to avoid damage to the components while attaching to the connecting pipes.
To prevent the refrigerant piping from oxidizing inside when welding, it is necessary to charge
CAUTION
nitrogen, or oxide will block the refrigeration system.
The indoor and outdoor connecting pipe interface and power line outlet
Various piping and wiring patterns can be selected,such as out from the front ,the back the side ,and underneath,
etc. The following figure shows the locations of several piping and wiring knock-off interfaces.
• Side out pipe: cut the side hole of the pipe-outlet plate selectively. It is suggested to cut a
piece of metal plate below to avoid vermin access.
CAUTION
• Front out pipe: cut the frontal hole of the pipe-outlet plate selectively. It is suggested to cut
a piece of metal plate right side to avoid vermin access.
• Wiring of power cord: the strong and weak electrical wire should be out through the two
plastic holes of the pipe-outlet plate, and bound together with gas and liquid pipe.
Rinnai
Figure 38.
Front out pipe
Side out pipe
Figure 39.
38 Ducted Reverse Cycle Inverter Installation Manual