Recommended Liquid Line Sizes
For R-410A Refrigerant
TR-CFS Model No. /Total Btu
Capacity
Receiver to Evaporator
(Equivalent Ft.)*
50’ or
less
100’ or
less
150’ or
less
021 / 72,000
1/2
1/2
1/2
028 / 96,000
1/2
5/8
5/8
035 / 120,000
1/2
5/8
5/8
042 / 143,000
1/2
5/8
5/8
053 / 180,000
5/8
7/8
7/8
070 / 240,000
7/8
7/8
7/8
088 / 300,000
7/8
7/8
7/8
105 / 360,000
7/8
7/8
1 1/8
Note:
Equivalent Ft. accounts for the linear pipe length as well as equivalent
length of Valves, Elbows & Tee’s as shown in the previous table.
Recommended Discharge Line Sizes
For R-410A Refrigerant
TR-CFS Model No./Total Btu
Capacity
Equivalent Length Ft.
(a)
(a) Vertical runs are based on a total rise of 30 equivalent feet. For longer
sizes, individual calculations must be made. Sizes assume the use of
single risers; double risers may be necessary.
50’ or
less
100’ or
less
150’ or
less
021 / 72,000
5/8
5/8
5/8
028 / 96,000
7/8
7/8
7/8
035 / 120,000
7/8
7/8
7/8
042 / 143,000
7/8
7/8
7/8
053 / 180,000
1-1/8
1-1/8
1-1/8
070 / 240,000
1-1/8
1-1/8
1-1/8
088 / 300,000
1-1/8
1-1/8
1-1/8
Installation
SS-SVX002B-EN
25
Consult ASHRAE standards and refer to the Copeland
applications data guide for more detailed information
regarding refrigerant line traps and line sizing.
Water/Glycol and Hot Water Piping
Field piping may not necessarily be the same size as the
pipe connection on the unit. Piping should be sized to
match the system pressure drop and flow capacity and
may require reducing fittings to match the connection size
on the air conditioner. An air vent and several Schrader
valves are installed in the unit piping. Refer to the piping
diagram supplied with your unit. Provide manual shut-off
valves in both the supply and return lines for servicing the
unit and for emergency isolation.
Note:
A 20 mesh (opening size = 865 microns) stainless
steel Y-strainer with blowdown is recommended to
be installed in the supply line. The strainer screen
should be cleaned periodically
NOTICE
Fluid coils and associated piping circuits are
pressurized (up to 100 psi) and sealed when the unit
leaves the factory. Before installing the interconnecting
piping, release the pressure via an available stem valve
or Schrader valve prior to uncapping the pipes.
If newly installed supply and return piping is used, it is
recommended that the piping system be cleaned prior to
connecting it to the unit. If solvents/cleaning solutions are
used, ensure they are completely flushed from the piping
before connecting it. Failure to do so could result in
equipment problems.
NOTICE
When installing and filling water, water/glycol and hot
water reheat loops, all air must be bled from the piping
system.
Note:
Water/glycol cooled systems with low entering
fluid temperatures should have insulated piping to
prevent condensation from forming on the pipes if
ambient dew point temperatures are higher than
the fluid temperatures.
The recommended ethylene glycol solution ratio is 40%
glycol to 60% water. (Dowtherm SR1 manufactured by
Dow Chemical Co. is recommended) Use only ethylene
glycol with inhibitors for corrosion protection.
Condensate Drain
Gravity Drain
A drain line is provided to drain the condensate pan. If an
optional humidifier is used, the drain line from the
humidifier is typically connected to the condensate drain
line. The end of the drain line is clamped inside the cabinet.
The installer must connect a customer supplied drain hose
to the end of the drain line to remove water from the
cabinet. See the installation drawing provided with your
unit for the size and location of the condensate drain line.
Note:
In most cases the humidifier drains (hot) water into
the condensate drain during normal operation. As
an option, a separate drain line may be provided for
the humidifier.
The drain line must be located so it will not be exposed to
freezing temperatures. The diameter of the drain line
should be the full size of the connection.
Note:
Pour some water into the condensate drain pan
prior to start-up. This fills the trap and prevents air
from being drawn up the drain lines.
NOTICE
Coil Fins Damage!
Do not use chloride based water conditioning additives
in condensate drain pans. This will cause corrosion to
occur on the coil fins.
