PCH cold storage generator module
APEN GROUP SPA reserves the right to contribute the necessary modifications to the documentation or documentation
6
cod. HG0130.05GB ed.B-2104
PCH
7
cod. HG0130.05GB ed.B-2104
PCH
HG0130.00 A
002
3.
TECHNICAL FEATURES
The modulating condensing warm air heaters of PCH series
have been designed to be installed in air handling and roof-top
units as heating units.
The premixing and modulating technology allows the heater to
achieve efficiency of up to 109% of the L.C.V. (lower calorific
value). The unit can be used on all machines requiring air to
be heated during their operation (such as dryers, ventilation
systems etc.).
The unit can operate independently. To start up the unit, simply
connect it to the mains power supply and to the gas mains.
The heat output of modules ranges from 5 to 97 kW. For greater
output levels, multiple PCH modules must be combined. They
can be assembled in parallel to reach great heat output (up to
400 kW).
The units can be controlled in three ways:
• proportionally, with a 0-10 Vdc external control;
• with ON-OFF control;
• with cascaded operation, when more units are installed.
The PCH module can be installed with the front panel, supplied
as an accessory, positioned directly on the outside, with no
additional guard.
The air is heated through its passage on combustion chamber
and exchanger pipe surfaces.
The heat exchanger complies with the construction requirements
for equipment where combustion gases produce condensate.
The combustion chamber and the surfaces in contact with
condensation (such as the pipe bundle and exhaust hood),
are made of AISI 441, in order to provide high resistance to
condensation.
The following table shows the conversion of stainless steels used:
USA-AIS
EN-No.
COMPOSITION
AISI 430
1.4016
X6 Cr17
AISI 441
1.4509
X2 CrTiNb 18
The innovative design and large surface of the combustion
chamber and heat exchanger pipes ensure optimum efficiency
and durability.
The burner is made entirely of stainless steel with special
mechanical solutions to ensure optimal reliability and
performance levels, as well as high thermal and mechanical
resistance.
The control located inside the burner housing allows the service
centre to check and view the working phases and identify any
faults that may have occurred.
The PCH heater has a modulating mode of operation; the thermal
output and, therefore, the heat output (fuel consumption) vary
according to the heat demand. When the heat demand from the
environment reduces, the heater uses less gas and increases
its efficiency - up to 109% (a Net caloric value).
Inherent Safety
The efficiency increase at minimum power is achieved by using
a sophisticated air/gas mixing technique and by regulating at
the same time the combustion air flow and the fuel gas flow.
This technology increases the heater safety as the gas valve
supplies the fuel according to the air flow. Unlike atmospheric
burners, the CO
2
content remains constant throughout the heater
operating range, allowing the heater to increase its efficiency
when the heat output reduces.
If there is no combustion air, the valve will not supply gas; if
the combustion air flow reduces, the valve will automatically
reduce the gas flow yet will keep its combustion parameters
at optimal levels.
Low emissions
The premixed burner, in combination with the air/gas valve,
ensures "clean" efficient combustion having very low emissions.
Control panel
Example of installation of a PCH heater with door
PCH series display
