Line Set Sizes - Geostar ASTON Series Installation Manual

Refrigeration cont.
WARNING: There are 12 total (360°) turns on
the superheat adjustment stem from wide open
to fully closed. When adjusting the superheat
stem clockwise (superheat increase) and the
stop is reached, any further clockwise turning
adjustment will damage the valve.
Determining Subcooling
1. Measure the temperature of the liquid line on the
small refrigerant line (liquid line) just outside the
split cabinet. This location will be adequate for
measurement in both modes unless a significant
temperature drop in the liquid line is anticipated.
2. Measure the liquid line pressure by attaching
refrigerant gauges to the schrader connection on the
liquid line service valve.
3. Convert the pressure obtained in Step 2 to the
saturation temperature by using the Pressure
Temperature Conversion Chart for R-410A.
4. Subtract the temperature in Step 1 from the
temperature in Step 3. The difference will be the
subcooling value for that unit. Refer to the Operating
Parameters tables for subcooling ranges at specific
enter water conditions.

Line Set Sizes

Unit Air
Size Handler
022 SAH022
030 SAH030
036 SAH036
042 SAH042
048 SAH048
060 SAH060
070 SAH066
026 SAH026
038 SAH036
049 SAH048
064 SAH060
072 SAH066
CAPACITY MULTIPLIER
Notes: * The "Charge Amount with SAH Air Handler" column is based on the charge amount for a SAH Air Handler + Compres-
sor Section/Split.
Additional charge will need to be added accordingly for line set length.
After charge is added, additional adjustments can be made to get appropriate subcooling and superheat measurements.
Additional charge for R410A is 0.50 oz. per ft. for 3/8" and 1.0 oz. per ft. for 1/2" tube.
Longer line sets will significantly reduce capacity and efficiency of the system as well as adversely effect the system reliability
due to poor oil return.
ASTON & ASTON ADVANCED DUAL-CAPACITY OUTDOOR SPLIT SERIES INSTALLATION MANUAL
20 feet
Suction Liquid
5/8" OD 3/8" OD 5/8" OD
5/8" OD 3/8" OD 3/4" OD
5/8" OD 3/8" OD 3/4" OD
3/4" OD 3/8" OD 3/4" OD
3/4" OD 3/8" OD 7/8" OD
7/8" OD 1/2" OD 7/8" OD
7/8" OD 1/2" OD 7/8" OD
5/8" OD 3/8" OD 3/4" OD
5/8" OD 3/8" OD 3/4" OD
3/4" OD 3/8" OD 7/8" OD
7/8" OD 1/2" OD 7/8" OD
7/8" OD 1/2" OD 7/8" OD
1.00
40 feet
Suction Liquid Suction
3/8" OD 3/4" OD
3/8" OD 3/4" OD
3/8" OD 3/4" OD
3/8" OD 7/8" OD
3/8" OD 7/8" OD
1/2" OD 1-1/8" OD
1/2" OD 1-1/8" OD
3/8" OD 3/4" OD
3/8" OD 3/4" OD
3/8" OD 7/8" OD
1/2" OD 1-1/8" OD
1/2" OD 1-1/8" OD
0.985
35
60 feet
Split Factory
Charge (oz.)
Liquid
3/8" OD 56
3/8" OD 56
1/2" OD 56
1/2" OD 74
1/2" OD 90
1/2" OD 92
1/2" OD 108
1/2" OD 52
1/2" OD 56
1/2" OD 90
1/2" OD 96
1/2" OD 104
0.97
*Charge Amount
with SAH Air
Handler (oz.)
76
82
96
104
112
119
135
72
96
112
119
133
1/13/2017