JOHNSON CONTROLS
16
FORM 150.72-ICOM6
ISSUE DATE: 08/03/2022
SECTION 2 – PRODUCT DESCRIPTION
LD28293
ENCLOSURE
FIGURE 1 - COMPRESSOR ENCLOSURE FOR
YLAA0041HE
Brazed Plate Evaporator
The compact, high efficiency Brazed Plate Heat Ex-
changer (BPHE) is constructed with 316L stainless
steel corrugated channel plates with a filler material
between each plate. It offers excellent heat transfer
performance with a compact size and low weight, re-
ducing structural steel requirements on the job site.
The heat exchanger is manufactured in a precisely con-
trolled vacuum-brazing process that allows the filler
material to form a brazed joint at every contact point
between the plates, creating complex channels. The ar-
rangement is similar to older plate and frame technol-
ogy, but without gaskets and frame parts.
Water inlet and outlet connections are grooved for
compatibility with field supplied ANSI/AWWA C-606
couplings.
The evaporator is equipped with a thermostat-con-
trolled heater. The heater provides freeze protection
for the evaporator down to -20°F (-29°C) ambient. The
evaporator is covered with 3/4 in. flexible, closed-cell,
foam insulation (K=0.25).
A 40-mesh wye-strainer is provided as standard for
installation upstream of the heat exchanger to prevent
clogging from water system debris.
Canadian Registration Number (CRN)
Application and Proof of Conformance
Since all YLAA brazed plate evaporators are catego-
rized as pressure “H” fittings per CSA-B51, a CRN
label or marking is not provided on the evaporator. Ac-
cording to the Canadian Standards Association’s Boil-
er, Pressure Vessel, and Pressure Piping Code B-51
(2009 version), a product registered as a category “H”
fitting does not require a label or marking displaying
the CRN.
TABLE 1 - CANADIAN REGISTRATION NUM-
BERS
CANADIAN PROVINCE CRN #
BC OH13953.51
AB OH13953.52
ON OH13953.5
PQ/MB/SK OH13953.56
NB OH13953.57
NS OH13953.58
PEI OH13953.59
NF OH13953.50
NU OH13953.5N
NWT OH13953.5T
YU OH13953.5Y
Condenser
Microchannel Condenser (MCHX)
MCHX Condensers are made of a single material to
avoid galvanic corrosion due to dissimilar metals.
MCHX and headers are brazed as one piece. Integral
sub cooling is included. The design working pressure
of the MCHX is 650 psig (45 bar). MCHX Condenser
is easily washable with clear water.
Fans
The condenser fans are composed of corrosion resis-
tant aluminum hub and glass-fiber reinforced poly-
propylene composite blades molded into a low noise
airfoil section. They are designed for maximum effi-
ciency and are statically and dynamically balanced for
vibration free operation. They are directly driven by
independent motors, and positioned for vertical air dis-
charge. The fan guards are constructed of heavy gauge,
rust resistant, coated steel. All blades are statically and
dynamically balanced for vibration free operation.
Motors
The fan motors are Totally Enclosed Air-Over, and are
current protected. They feature ball bearings that are
double sealed and permanently lubricated.
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