Trane Variable Speed ComfortLink II 4TWV8048A1000B User Manual

18-BC92D1-1F-EN
15
Charging: Weigh-In Method
Weigh-In Method can be used for the initial installation, or anytime a system charge is being replaced. Weigh-In Method can also be used when
power is not available to the equipment site or operating conditions (indoor/outdoor temperatures) are not in range to verify with the
subcooling charging method.
Table 17. Heat Pumps
A
B C D
Model
Factory
Charge
Charge
adder for
Indoor Coil
Charge
multiplier for
interconnecting
refrigerant tube
length
024 7 lb. 6 oz. 6 oz.
0.6 oz/ft
036 8 lb. 3 oz. 8 oz.
0.6 oz/ft
037 9 lb. 8 oz. 12 oz.
0.6 oz/ft
048 9 lb. 13 oz. 13 oz.
0.6 oz/ft
049 10 lb. 12 oz. 15 oz.
0.6 oz/ft
060 11 lb. 14 oz.
1 lb., 2 oz. 0.6 oz/ft
Table 18. Air Conditioners
A
B C D
Model
Factory
Charge
Charge
adder for
Indoor Coil
Charge
multiplier for
interconnecting
refrigerant
tube length
024 7 lb. 6 oz. 6 oz.
0.6 oz/ft
036 7 lb. 14 oz. 7 oz.
0.6 oz/ft
037 9 lb. 6 oz. 12 oz.
0.6 oz/ft
048 11 lb. 1 oz.
1 lb., 0 oz.
0.6 oz/ft
060 11 lb. 14 oz.
1 lb., 2 oz.
0.6 oz/ft
Table 19. New Installations — Calculating Charge using the Weigh-In method
1. Measure in feet the distance between the outdoor unit and the indoor
unit and record on Line 1. Include the entire length of the line from the
service valve to the IDU.
2. Enter the charge multiplier from Column D.
3. Multiply the total length of refrigerant tubing (Line 1) times the value on
Step 2. Record the result on Line 3 of the Worksheet.
4. Locate the outdoor equipment size in Column A. Record the value shown
in Column C of Table 16 for Heat Pumps or Table 17 for Air Conditioners.
5. Add the values from Step 3 and Step 4 and record the resulting value.
This is the amount of refrigerant to weigh-in prior to opening the service
valves.
New Installation Weigh-In Method Worksheet
1. Line Length (ft) ________________________
2. Value from Column D x ________________________
3. Step 1 x Step 2 = ________________________
4. Charge Adder (column C) + ________________________
5. Refrigerant (Steps 3+4) = ________________________
Table 20. Sealed-System Repairs — Calculating Charge using the Weigh-In method.
1. Measure in feet the distance between the outdoor unit and the indoor
unit and record on Line 1. Include the entire length of the line from the
service valve to the IDU.
2. Enter the charge multiplier from Column D.
3. Multiply the total length of refrigerant tubing (Line 1) times the value on
Line 2. Record the result on Line 3 of the Worksheet.
4. Locate the outdoor equipment size in Column A. Record the value shown
in Column C of Table 16 for Heat Pumps or Table 17 for Air Conditioners.
5. Record the value in Column B to Line 5 of the Worksheet.
6. Add the values from Step 3, Step 4, and Step 5 and record the resulting
value on Line 6. This is the amount of refrigerant to weigh-in.
New Installation Weigh-In Method Worksheet
1. Line Length (ft) ________________________
2. Value from Column D x ________________________
3. Step 1 x Step 2 = ________________________
4. Charge Adder (column C) + ________________________
5. Factory Charge (column B) + ________________________
6. Refrigerant (Steps 3+4+5) = ________________________
Note: The only mode approved for setting or validating system charge is using Charging Mode-Cooling. Charging Mode-Cooling is a variable
speed test mode found in the 850/950 comfort control Technician Menu. Outdoor Temperature must be between 55°F and 120°F with
Indoor Temperature kept between 70°F and 80°F.

Trane Variable Speed ComfortLink II 4TWV8048A1000B Specifications

General

Brand	Trane
Model	Variable Speed ComfortLink II 4TWV8048A1000B
Category	Heat Pump
Language	English