APEN GROUP SPA reserves the right to contribute the necessary modifications to the documentation or documentation
18
cod. HG0130.05GB ed.B-2104
PCH
19
cod. HG0130.05GB ed.B-2104
PCH
PCH cold storage generator module
HG0130.00 A
014
HG0130.00 A
015
4.
INSTALLATION INSTRUCTIONS
Instructions for installing and setting the heater are intended for
suitably qualified personnel only. We recommend the installer
to read safety warnings.
Installation instructions for units including a PCH module are the
same as those applying to warm air heater installation because,
from the regulatory point of view, they are warm air heaters.
4.1. Installing the module inside the units
The PCH heater can be fitted to air handling or roof-top units
in two different ways:
OUTDOOR installation: the module outer panel is outside the unit.
INDOOR installation: the module outer panel is fitted inside the
unit, creating a gap between the module and the outer panel
of the unit.
OUTDOOR Installation
Either “C” type (sealed combustion chamber) and “B” type (open
combustion chamber) can be used for the OUTDOOR installation.
If the heater is installed outdoor, pay attention to correctly install
the seal on the door; make sure preventive measures are taken
to prevent water from entering the burner casing (see the picture
showing the position of the seals in the previous pages).
In order to install a “C” type module with watertight combustion
chamber, connect an air intake pipe and associated terminal
to the air port.
If a “B” type installation is required (with open combustion
chamber), fit to the air intake the stainless steel terminal supplied
by APEN GROUP as standard.
The OUTDOOR installation must be carried out by using the front
panel kit (see paragraph 3.3 "Supply of PCH modules") or by fitting
a special panel to be made in compliance with the drawings (in
.cad format) that APEN GROUP can supply on request.
INDOOR Installation
Both “C” type (sealed combustion chamber) and “B” type (open
combustion chamber) can be used for the INDOOR installation.
"B" type heater with combustion circuit open to the environment
in which it is installed
In this case further precautions must be taken in addition
to those required to prevent water from entering the burner
housing. For example, the compartment where the heater will
be connected to the gas supply will need to be ventilated by
making some vents on the outer panel equal to 2% of the larger
internal section. These vents must be equally split between the
top and the bottom of the panel (EN525) and the gap must be
airtight with respect to the air treatment passage. For this type
of heater, the combustion air can be drawn directly from the
gap; therefore great care must be taken to completely seal such
gap, in particular in installations where the unit fan is located
downstream of the PCH heater.
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NOTE: Under no circumstances should supply air be
extracted from the compartment of the air handling unit or
the roof-top unit by the supply-air fan as this would cause,
when the burner is switched off, very hot air from the heat
exchanger to pass through the burner, causing irreparable
damages to the burner fan.
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Outdoor installation example
Indoor installation example
(with gap vent opening)
