MODEL DESCRIPTION
R-410A CHARGE QUANTITY
(Ounces)
3/8" Line 7/8" Line Total
GTLS-03-1 3' Line Set 1.2 3 4.2
GTLS-15-1 15' Line Set 6 15 21
GTLS-25-1 25' Line Set 10 25 35
GTLS-35-1 35' Line Set 14 35 49
GTLS-50-1 50' Line Set 20 50 70
Manual 2100-537
I
Page 42 of 54
TABLE 9
PRE-CHARGED LINE SET REFRIGERANT QUANTITY
REFRIGERANT CHARGE
LINE SET INSTALLATION – GTA COIL
SECTIONS
CHARGE ADJUSTMENT
All supplied line sets with threaded refrigerant connections
are factory evacuated and charged with R-410A refrigerant
at the quantity required to optimize system performance.
Refer to Table 9 to see this charge quantity if you need to
reprocess the charge due to repairing damage or replacement
of a defective component.
For those using Stub Kits GTLS-SK2-1 or GTLS-SK4-1,
you will rst need to braze up both ends of your line set
(to the point that it is sealed). Ports are provided on the
GTLS-SK*-1 kits so that you can pull a vacuum on the
line set and pre-charge with refrigerant before screwing on
the refrigerant ttings onto the pre-charged condenser and
evaporator (if using one with threaded connectors).
For charge quantity, use Table 9 as a good general reference
to the required R-410A refrigerant required based upon your
line set length. Or, you can specically measure your line
set length, and add 1.4 ounces of R-410A refrigerant per 1'
of line set length.
REFRIGERANT FITTING ATTACHMENT
1. Coat all mating surface, including o-rings, with
R-410A refrigerant oil (Polyol Ester).
2. Attach female ttings to coil/condensing unit portion
by hand-threading initially. Be careful not to cross-
thread assembly. For the pre-manufactured 3' line
set used with a vertical (stacked) conguration, the
ttings should be threaded simultaneously. Again, be
careful not to cross-thread either assembly.
3. Final torque should be achieved. Use the appropriate
size wrench in conjunction with a second (backing)
wrench to ensure that ttings do not spin or twist on
the copper refrigerant lines. Use the following torque
rates:
3/8" Lineset – 22-25 ft. lbs. (30-35 Nm)
7/8" Lineset – 44-47 ft. lbs. (60-65 Nm)
CHECKING REFRIGERANT CHARGE
QUANTITY – GTA COIL SECTIONS
The correct R-410A charge is shown on the unit rating
plate (including adders for the various line set lengths).
Reference Figure 21 to validate proper system operation.
However, it is recommended that if incorrect charge is
suspected, the system refrigerant be reclaimed, evacuated,
and charged to nameplate charge quantity and type
(including necessary charge adjustment for the installed line
set length).
The nameplate charge quantity is optimized for thermal
performance and efciency throughout all modes of
operation.
