Long Lineset Instructions

Page 2
S If 51 to 80 linear feet: Crankcase heater required,
non-bleed port TXV (see TXV note ) preferred (RFCIV
acceptable with maximum vertical of 25 feet).
S If 81 - 200 linear feet: Crankcase heater and non-bleed
port TXV (see TXV note) required.
S Over 200 linear feet: not recommended.
TXV NOTE:
a) Indoor Factory Installed non-bleed, non-adjustable
TXV can be used on the system if it can maintain
superheat lower than 25°F at outdoor unit service
valve. Superheat is critical to compressor operating
conditions.
b) If indoor unit does not have a factory installed TXV,
or factory installed TXV needs replacing due to
system match, up or the factory TXV is not capable
of maintaining low enough superheats, use table 1
for ordering the correct TXV for specific size indoor
unit. All of these are indoor non-bleed adjustable
thermostat expansion valves. Superheat adjustment
procedures can be found in the TXV kit instruction.
S If not factory provided, high and low pressure
switches are recommended
S If not factory provided, a liquid line filter drier is
required
S For HFC-410A recommend adding oil to system
based on the amount of refrigerant charge in the
system. No need to add oil in systems with 20
pounds of refrigerant or less. For systems over 20
pounds - add one ounce of every five pounds of
refrigerant.
HCFC-22
Total equivalent length = 240 feet (Piping and all fittings,
etc).
NOTE — Length is general guide. Lengths may be more or
less, depending on remaining system design factors.
S Maximum linear (actual) length = 200 feet.
S Maximum linear liquid lift = 50 feet.
NOTE — Maximum lifts are dependent on total length,
number of elbows, etc that contribute to total pressure
drop.
S Maximum length vapor riser = 125 feet.
S Up to 50 linear feet: use rated line sizes listed in unit
specifications or installation instructions.
S If 51 to 80 linear feet: Crankcase heater required,
non-bleed port TXV (see TXV note) preferred (RFCIV
acceptable with maximum vertical of 25 feet).
S If 81 - 200 linear feet: Crankcase heater and non-bleed
port TXV (see TXV note below) required.
S Over 200 linear feet: not recommended.
TXV NOTE:
a) Indoor Factory Installed non-bleed, non-adjustable
TXV can be used on the system if it can maintain
superheat lower than 25°F at outdoor unit service
valve. (Superheat is critical to compressor operating
conditions)
b) If indoor unit does not have a factory installed TXV,
or factory installed TXV needs replacing due to
system match, up or the factory TXV is not capable
of maintaining low enough superheats, use table 2
for ordering the correct TXV for specific size indoor
unit. All of these are indoor non-bleed adjustable
thermostat expansion valves. Superheat adjustment
procedures can be found in the TXV kit instructions.
S If not factory provided, high and low pressure
switches are recommended
S If not factory provided, a liquid line filter drier is
required
S For HFC-22 systems with suction lines over 50 feet
with lines that are 7/8” or smaller, add three ounces
of oil every 10 feet of line over 50 feet. For systems
with 1-1/8” and larger suction lines, add four ounces
of oil every 10 feet of line over 50 feet.
HEAT PUMP SYSTEM
HFC-410A
S Total equivalent length = 240 feet (Piping and all
fittings, etc)
NOTE — Length is general guide. Lengths may be more or
less, depending on remaining system design factors.
S Maximum linear (actual) length = 200 feet.
S Maximum linear liquid lift = 60 feet.
NOTE — Maximum lifts are dependent on total length,
number of elbows, etc that contribute to total pressure drop
plus when the outdoor unit is above the indoor unit.
S Maximum length vapor riser = 60 feet.
S Up to 50 linear feet: use rated line sizes listed in unit
specifications or installation instructions.
S If 51 to 200 linear feet: Crankcase heater required,
non-bleed port TXV (see TXV note) required.
S If 81 - 200 linear feet: Crankcase heater and non-bleed
port TXV (see TXV note below) required.
S Over 200 linear feet: not recommended.
TXV NOTE:
a) Indoor Factory Installed non-bleed, non-adjustable
TXV can be used on the system if it can maintain
superheat lower than 25°F at outdoor unit service
valve. Superheat is critical to compressor operating
conditions.