IO-123114 Effective 12-04-2014
5
Note: Photos are for basic illustration purposes only. Actual equip-
ment configuration may differ from that shown.
Use Piston sizes recommended by the
outdoor unit manufacturer whenever pos-
sible. The piston should be sized accord-
ing to the capacity of the outdoor unit.
CAUTION
!
Failure to install the proper piston can
lead to poor system performance and
possible compressor damage.
!
WARNING
I. Installation
I-1.
Disassemble flowrator body
using two wrenches and un-
screwing with a counterclockwise
motion.
I-4.
Braze the stub-out portion to the liquid line and let cool.
I-3.
Slide the attachment nut onto
the liquid line stub out.
I-6.
Tighten the nut to a torque of approximately 10-30 ft-lbs.
Do NOT
overtighten the nut. Overtightening will impede the piston movement
during operation.
I-5.
Taking care that the white
Teflon seal is still in place inside
the flowrater body, firmly seat the
stub and screw the attachment
nut to flowrater body.
Be aware of the Teflon O-ring. Be sure to
replace the O-ring to attain a proper
seal. (The Teflon O-ring is located between
the two halves of the flowrator)
CAUTION
!
I-2.
Replace the Teflon O-ring
(located between the halves).
Discard Schrader if present.
During some installations, a piston change may
be required. If so, the installer
MUST
change the
piston. Use piston sizes recommended by the
outdoor unit manufacturer. If a sizing chart is not
available, use the piston size chart provided be-
low to size the required piston. The size of the
piston is stamped on the piston body (Fig 8A-2).
II. Piston Replacement
Fig 8A-2
Use the chart below when matching coil with an outdoor unit with a
different nominal capacity than the coil.
Note: Photos are for basic illustration purposes only. Actual equip-
ment configuration may differ from that shown.
II-4.
Slide the 13/16” nut over
the lineset and separate the two
halves of the flowrator.
II-1.
Evacuate the system as per manufacturer guidelines and rec-
ommendations
II-2.
Turn the 13/16” nut once to release any residual pressure in the
coil.
II-3.
After ensuring that the coil
is free of any residual pressure,
disassemble the flowrator body
completely using two wrenches.
Take great care not to distort the
feeder tubes. The wrench used
to clasp the nut should be turned
in counter-clockwise direction to
unscrew the nut.
