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SERVICING
63
Remote
Condenser
Orifice
Size
Remote
Heat Pump
Orifice
Size
A/ GS X1 30 181 A
0.049
A/GSZ130181
0.049
A/GSX130181B
0.051
A/GSZ130241
0.057
A/ GS X1 30 241 A
0.053
A/GSZ130301
0.063
A/GSX130241B
0.057
A/GSZ130361
0.068
A/GSX130301
0.059
A/GSZ130421
0.074
A/GSX130301B
0.061
A/GSZ130481
0.078
A/ GS X1 30 361 A
0.068
A/GSZ130601
0.088
A/GSX130361B
0.070
SSZ140361A*
0.071
A/ GS X1 30 421 A
0.074
SSZ140421A*
0.076
A/GSX130421B
0.076
SSZ140481A*
0.080
A/ GS X1 30 481 A
0.080
SSZ140601A*
0.088
A/GSX130481B
0.080
A/GSX130601
0.092
SSX140181A
0.049
SSX140241A
0.057
SSX140301A
0.063
SSX140361A
0.067
SSX140421A
0.074
SSX140421B
0.074
SSX140481A
0.079
SSX140601A
0.088
A/SSX140181B
0.052
A/SSX140241B
0.055
A/SSX140301B
0.065
A/SSX140361B
0.070
S-105B THERMOSTATIC EXPANSION VALVE
The expansion valve is designed to control the rate of liquid
refrigerant flow into an evaporator coil in exact proportion to
the rate of evaporation of the refrigerant in the coil. The
amount of refrigerant entering the coil is regulated since the
valve responds to temperature of the refrigerant gas leaving
the coil (feeler bulb contact) and the pressure of the refrigerant
in the coil. This regulation of the flow prevents the return of
liquid refrigerant to the compressor.
The illustration below shows typical heatpump TXV/check
valve operation in the heating and cooling modes.
COOLING HEATING
TXV VALVES
Some TXV valves contain an internal check valve thus
eliminating the need for an external check valve and bypass
loop. The three forces which govern the operation of the valve
are: (1) the pressure created in the power assembly by the
feeler bulb, (2) evaporator pressure, and (3) the equivalent
pressure of the superheat spring in the valve.
0% bleed type expansion valves are used on indoor and
outdoor coils. The 0% bleed valve will not allow the system
pressures (High and Low side) to equalize during the shut
down period. The valve will shut off completely at approxi-
mately 100 PSIG.
30% bleed valves used on some other models will continue
to allow some equalization even though the valve has shut-off
completely because of the bleed holes within the valve. This
type of valve should not be used as a replacement for a 0%
bleed valve, due to the resulting drop in performance.
The bulb must be securely fastened with two straps to a clean
straight section of the suction line. Application of the bulb to
a horizontal run of line is preferred. If a vertical installation
cannot be avoided, the bulb must be mounted so that the
capillary tubing comes out at the top.
THE VALVES PROVIDED BY GOODMAN ARE DESIGNED
TO MEET THE SPECIFICATION REQUIREMENTS FOR
OPTIMUM PRODUCT OPERATION. DO NOT USE SUB-
STITUTES.
S-105A PISTON CHART FOR ASX13, GSX13,
SSX14, ASX14, ASZ13, GSZ13 units