PCH cold storage generator module
APEN GROUP SPA reserves the right to contribute the necessary modifications to the documentation or documentation
30
cod. HG0130.05GB ed.B-2104
PCH
31
cod. HG0130.05GB ed.B-2104
PCH
HG0130.00 A 030
HG0130_IM_001
4.6. PCH
Condensate Drain
Special attention must be paid to the condensate drain; an
incorrectly installed drain, in fact, could jeopardize the correct
operation of the equipment.
The factors to be taken into account are:
•
risk of condensation build-up inside the heat exchanger;
•
risk of condensation water freezing in the pipes;
•
risk of flue gas discharged from the condensate drain.
Build up of condensation in the heat exchanger
During normal operation, condensate must not be allowed to
accumulate within the heat exchanger.
A sensor fitted in the PCH heater internal trap checks and
stops the burner operation before the condensate reaches a
potentially dangerous level inside the flue gas collection hood.
Whilst installing the module inside a unit and, later on, when
positioning the unit on the floor, it is essential to make sure that
the module, and therefore the heat exchanger, are perfectly level
to maintain the typical incline of the tube bundle.
Free drainage
If the unit is installed outdoors, unless the temperatures never
drops below freezing, the water could be drained directly outside,
without any connections to other pipes. It is essential to check
that the condensate flows away from the unit.
If the drainage needs to be ducted, it is necessary to install an
open type connection (socket pipe), similar to the one in picture
below, to prevent ice forming in the pipe from blocking condensate
drainage, resulting in water accumulation in the exchanger.
If the drain pipe is installed in an outdoor site, it may need to
be heated by means of a heating cable.
Connection to the condensate drain
The PCH modules are supplied with a condensate drain on the
module outer panel.
According to the applications, APEN GROUP can supply a
condensate neutraliser kit (code G14303).
According to the type of installation, the module can drain the
condensate in the following ways:
•
free drainage;
•
drainage to water pipes;
•
drainage inside the unit (water trap).
Multiple PCH heaters are provided with a single condensate
drainage that collects the single internal module exhausts and
a lower trap air vent pipe, placed on the front panel near the
lower module.
Precautions
Materials to be used for the condensation drainage system:
•
aluminium, stainless steel, silicone or Viton pipe or EPDM
for hot pipes that allow the flue gas to go through;
•
for cold pipes (water pipes), PVC and any materials suitable
for hot pipes.
Do not use copper or galvanised iron pipes.
Drainage into water courses
Taking the condensation drain inside the room to be heated is a
good solution in order to avoid the formation of ice; condensation
can be drained into water courses or can be collected and treated
with alkaline solutions (condensate neutraliser kit, code G14303).
The pipe must be routed inside the unit (in warm conditions) up
to the point where it enters the site, avoiding external routing.
Drainage inside the unit
This solution is also a good protection against any icing on
the water trap; the internal connection between PCH module
and water trap can be made using a silicone pipe available at
APEN GROUP.
For this method of installation it is essential to check that the
materials of the water trap of the Air Handling or Roof Top unit
where the PCH heater is installed are suitable for the relevant
use (e.g.: no galvanised metal sheet).
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ATTENTION: Not all countries allow the types of
condensation drains described here. Please refer to the
requirements specified by local legislation.
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Condensate drain
Inclined pipe bundle
Connection
(socket pipe)
Vent pipe
