System Charge Adjustment - Ecoer 2436 Installation Instructions Manual

ESI Outdoor Unit Installation Instruction

13. System Charge Adjustment

13.1 Weigh-in Method
Weigh-in method can be used for the initial installation, or anytime a system charge needs to be replaced.
Weigh-in method can also be used when power is not available on job site or ambient temperature is not
sufficient for refrigerant coefficient and sub-cooling charge method.
Table 13-1 Charge amount table
A B
Factory
Model
charge
2436
The data on
nameplate
4860
1. Invalid for system with electric heaters or other third-party heaters whose capacity is 1.2 times
of heat pump nominal heating capacity.
For example:
3 Ton system equips a 15KW electric heater.
15/(3*3.516)=1.42>1.2
2. Only take line length over 25ft into consideration.
Every condensing unit pre-charged up to 25 feet of standard size interconnecting liquid line.
For new installation
Calculate additional charge for liquid line which is greater than 25 ft.
1. Total line length =
2. Standard line length =
3. A minus B =
4. Refrigerant multiplier =
5. Additional refrigerant amount(C*D) =
For system repairs
Calculate the total system charge amount.
1. Total line length =
2. Standard line length =
3. A minus B =
4. Refrigerant multiplier =
5. Additional refrigerant amount(C*D) =
6. Factory charge on nameplate =
7. Total system charge amount =
Manufacturer reserves the right to change specifications or designs without notice.
C
Charge amount for
Indoor Model
indoor unit(oz)
24K
36K
36K
48K
60K
25
0.6
25
0.6
16/31
Charge multiplier for interconnecting
refrigerant tube length *2
0
14 *1
0
8 *1
22 *1
ft (A)
ft (B)
ft (C)
oz/ft (D)
oz (E) *E=0 if line length is less than 25ft.
ft (A)
ft (B)
ft (C)
oz/ft (D)
oz (E) *E=0 if line length is less than 25ft.
oz (F)
oz (G) G=E+F
www.ecoer.com
D
0.6 oz/ft
Note: 1Ton=3.516KW
08.2018