KRACK KR Series - TABLE 7 C. Recommended Expansion Valves for Gas Defrost Models

KR Electrical Defrost Unit Coolers (PN E108318_S) 14
TABLE 7C: RECOMMENDED EXPANSION VALVES FOR GAS DEFROST MODELS
MODELS
TXV
R404A R407A R448A
KR*14( )-037[ ]{ }
SBFSE-AA-Z
EGSE-1/4-Z
SBFNE-AA-Z
EGNE-1/2-Z
SBFDE-AAA-Z
EGDE-1/4-Z
KR*24( )-074[ ]{ }
SBFSE-A-Z
EGSE-1-Z
SBFNE-A-Z
EGNE-1-Z
SBFDE-AA-Z
EGDE-1/2-Z
KR*34( )-111[ ]{ }
SBFSE-A-Z
EGSE-1-Z
SBFNE-A-Z
EGNE-1-1/2-Z
SBFDE-A-Z
EGDE-1-Z
KR*44( )-148[ ]{ }
SBFSE-B-Z
EGSE-1-1/2-Z
SBFNE-B-Z
EGNE-2-Z
SBFDE-A-Z
EGDE-1-Z
KR*54( )-185[ ]{ }
SBFSE-B-Z
EGSE-2-Z
SBFNE-B-Z
EGNE-2-Z
SBFDE-A-Z
EGDE-1-Z
KR*64( )-220[ ]{ }
SBFSE-C-Z
EGSE-2-Z
SBFNE-B-Z
EGNE-3-Z
SBFDE-B-Z
EGDE-1 1/2-Z
KR*16( )-035[ ]{ }
SBFSE-AA-Z
EGSE-1/4-Z
SBFNE-AA-Z
EGNE-1/2-Z
SBFDE-AAA-Z
EGDE-1/4-Z
KR*16( )-045[ ]{ }
SBFSE-AA-Z
EGSE-1/2-Z
SBFNE-AA-Z
EGNE-3/4-Z
SBFDE-AA-Z
EGDE-1/3-Z
KR*26( )-090[ ]{ }
SBFSE-A-Z
EGSE-1-Z
SBFNE-A-Z
EGNE-1-Z
SBFDE-A-Z
EGDE-1/2-Z
KR*36( )-135[ ]{ }
SBFSE-B-Z
EGSE-1 -1/2-Z
SBFNE-B-Z
EGNE-2-Z
SBFDE-A-Z
EGDE-1-Z
KR*46( )-180[ ]{ }
SBFSE-B-Z
EGSE-2-Z
SBFNE-B-Z
EGNE-2-Z
SBFDE-A-Z
EGDE-1-Z
KR*56( )-192[ ]{ }
SBFSE-B-Z
EGSE-2-Z
SBFNE-B-Z
EGNE-2-Z
SBFDE-B-Z
EGDE-1 -1/2-Z
KR*66( )-270[ ]{ }
SBFSE-C-Z
EGSE-2-Z
SBFNE-C-Z
EGNE-3-Z
SBFDE-B-Z
EGDE-2-1/2-Z
TXV selections are based on +25°F suction temperature, 10°F T.D., and 95°F liquid temperature,
105°F Condensing temperature and high side pressure drop of 10PSIG.
*Replace with ‘D’ or ‘A’ where ‘D’ units are DOE compliant and ‘A’ are for Non-Regulated applications
[ ] Replace with the refrigerant letter code refer to the model nomenclature.
{ } Motor type designation, replace with ‘D’ for Dual Speed or ‘V’ for Variable Speed.
NOTE 2: For R-507, replace the second ‘S’ with ’P’ in R-404A TXV. For example, SBFSE-B-C (R-404A)
becomes SBFPE-B-C and EGSE-1-1/2-C becomes EGPE-1-1/2-C (R-507)
For R-449A, use the same TXV as R-448A
For R-407F, use the same TXV as R-407A
Before installing the unit, install the expansion valve and connect the equalizer tube (not required
on single fan units).
Expansion valves are adjusted at the factory prior to shipment. The setting will be okay for many
applications, but in some applications, adjustments may need to be made.
It is important that the operation of the expansion valve be checked out after the system has balanced out
at the desired room temperature. If the coil is being starved, it is necessary to reduce the superheat setting
of the valve by turning the adjusting stem counterclockwise. If the superheat is too low, it is necessary to
increase the superheat setting of the valve by turning the adjusting stem clockwise. It is recommended that
for a 10°F to 12°F T.D. system, the valve should be adjusted to maintain 5°F to 6°F superheat.