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york® airside products
• In other types of air handling unit constructions, the
majorityof air leakage occurs between the frame and the
panels.This is why YMA-C units are manufactured from 88mm
thicksheet metal panels insulated with CFC free PU foam. YMA-CAir
Handling Units comprise an extremely rigid sealed
frameconstruction, therefore gaps between panel junctions
areminimal, and consequently air leakage is greatly reduced.
• Non-metallic isolating frame around the internal perimeter
of each panel is also included, thus eliminating
thermaltransmission through the casing. An external
aluminiumprole maintains structural integrity and air-tightness
withoutcompromising the thermal-bridging characteristics of the
unit.
• The construction of the units achieves the highest
classicationavailable for both thermal transmittance (T1) and
thermalbridge factor (TB1) when measured against Eurovent
teststandards of prEN 1886:2007.
Flexibility• YMA-C Air Handling Units can be manufactured in
variedcongurations, with a wide selection of components, to
meetcustomer requirements.
• To ensure maximum exibility and guarantee the best solutionfor
each application, units are available in 50mm increments inboth
height and width.
• Units are also available in line with the requirements of
allEuropean hospital sector specications.
PANEL TYPECASING
STRENGTHCASING AIRLEAKAGE
THERMALTRANSMITTANCE
THERMALBRIDIGING
88 D1 L1 T1 TB1
Mechanical characteristics-prEN 1886:2007
Casing Materials Centrifugal Fans Filters Cooling Coils Heating
Coils Heat Recovery Humidiers
Prepainted Steel Forward Curved Panel Chilled Water Hot Water
Cross Flow Electronic Steam
Plastic Coatedsteel
Backward Curved Bag or HEPA Direct Expansion Electric Run-Around
Mains Steam
Stainless SteelExternal motoroption
Carbon Activated Steam Dessicant Cell
Aluminium Plug Fan Thermal Wheel Spray
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A i r H a n d l i n g S y s t e m s &
T e r m i n a l D e v i c e s
Bacteria ProtectionTo protect the system from bacteria
development and maximiseIndoor Air Quality, two main conditions
must occur:
1. Prevent the moist conditions that encourage bacterial
andfungal development by using steam humidiers rather thanwater
spray systems.
2. Ensure that the Air Handling Unit is frequently cleaned.
• The internal construction of the unit avoids that any of
theinterior support member is exposed and ensures the
internalsurface is perfectly smooth without obstructions or
crevices,thus offering no sanctuary for harmful bacteria to settle
andbreed and ensuring high IAQ and cleanliness levels.
• The whole AHU interior can be made from stainless steel,and
has an option for all oor panels to be sloped to givecontinuous
drainage for all sections and provide maximumopportunity for
internal cleaning.
• All units can be tested for air leakage at the factory,
andHEPA lter installations can also be particulate (DOP) testedto
eliminate any risk of contamination from dust, dust mites,moulds,
mildew, pet dander, pollen and other micro-organisms.Other
components available include silencers, dampers, and arange of
accessories.
• Units can also be supplied with an on board DDC controlpackage
incorporating the JCI SmartPAC control system, whichallows units to
be pre-engineered, wired and tested beforeshipment. Where units are
delivered in sections, a plug-and-play quick connection system
allows fast installation.
• Accurate computer selection ensures cost effective
matchingof all components to satisfy the specied conditions.
(*)
(*) please contact your local Johnson Controls sales ofce for
AirHandling Unit selections and further information
york® airside products
