Table of Contents
Advertisement
It is recommended that vertical suction risers not be up-
sized. Proper oil return to the compressor should be
maintained with suction gas velocity.
Filter Drier
and reliability. If the drier is shipped loose, it must be
void, if the drier is not installed.
NOTE:
units.
Installation of Line Sets
DO NOT fasten liquid or suction lines in direct contact with
type of hanger. Keep both lines separate, and always
insulate the suction line. Liquid line runs (30 feet or more)
in an attic will require insulation. Route refrigeration line
sets to minimize length.
DO NOT let refrigerant lines come in direct contact with
foundation. When running refrigerant lines through the
foundation or wall, openings should allow for a sound
and vibration absorbing material to be placed or installed
between tubing and foundation. Any gap between
a vibration damping material.
CAUTION
If ANY refrigerant tubing is required to be buried by state
or local codes, provide a 6 inch vertical rise at service
valve.
Installation into an Existing R-22 System
If the unit will be installed in an existing system that uses
an indoor unit or line sets charged with R-22 refrigerant,
installer must perform the following procedures to convert
the system to an R-410A system.
Procedure
DISTRIBUTOR
ASSEMBLY
Figure 10.
(Uncased Coil Shown)
1.
On fully cased coils, remove the coil access and
plumbing panels.
2.
Remove any shipping clamps from the liquid line and
distributor assembly.
3.
and one to remove the brass nut), disconnect liquid
twist or damage distributor tubes during this process.
4.
5.
Remove Existing Expansion Valve
1. On fully cased coils, remove the coil access and
plumbing panels.
2.
Remove any shipping clamps from the liquid line and
distributor assembly.
3.
Disconnect the equalizer line from the check expansion
4.
Remove the vapor line sensing bulb.
5.
Disconnect the liquid line from the check expansion
valve at the liquid line assembly.
6.
Disconnect the check expansion valve from the liquid
distributor tubes during this process.
7.
Remove and discard check expansion valve and the
®
rings (see Figure 11).
8.
Page 16
DISTRIBUTOR TUBES
LIQUID LINE ORIFICE HOUSING
®
TEFLON
RING
FIXED ORIFICE
REMOVE AND DISCARD
®
WHITE TEFLON
SEAL
(IF PRESENT)
LIQUID LINE ASSEMBLY
(INCLUDES STRAINER)
®
washer, as shown in Figure 10.
BRASS NUT
31-5000746 Rev. 0
Advertisement
Table of Contents
