Trane RAUJ-C20 Installation, Operation And Maintenance Manual page 47

Figure 33. Typical placement of split system piping components
Trane Condensing Unit
Access Port
Shut-off
Valve
Access
Port
Shut-off
Check
Valve
Valve
Evaporator Coil
Module (typical)
11
Table 11. Component number descriptions
Component Description
Interconnecting Suction Line Tubing
1
2 Suction Line Filter
3 Shutoff Valves - Manual ball valves
Interconnecting Liquid Line Tubing. If risers
exceed 10 feet, Trane must review the
4
application
5 Shutoff valves - Manual ball valves
6 Access Ports
Liquid Line Filter Drier
7
Liquid Line Solenoid Valve
8
Moisture and Liquid Indicator
9
Frostat™ (Required for coil freeze protection)
10
Expansion Valve (One Expansion Valve for
11
each Coil Distributor)
Evaporator Coil
12
Suction Line Components
Suction line refrigerant components necessary for field
installation in the suction line are a filter (Core Type),
access valves (ports), Frostat™ control for coil frost
protection, and ball shutoff valves. See
for placement location.
Suction Filter/Filter Drier (Field Supplied)
Install the filter in the suction line upstream of the
compressors. To prevent oil accumulation, suction
SS-SVX11K-EN
Shut-off Valve
(Unit Option)
Access Port
Pressure Relief
Valve
12. Evaporator Coil
9. Moisture and
Liquid Indicator
11. Expansion Valve
10. Frostat™
Figure 33, p. 47
Access Port
1. Suction
Line 2. Suction Line
Filter
5. Shutoff
Valve
8. Solenoid
Valve
7. Liquid Line
filters should be installed vertical with the outlet at the
bottom or no more than 45° from vertical.
Ball Shutoff Valves
The ball shutoff valve allows for isolation of the Filter/
Filter Drier for easier core replacement.
Two ball shutoff valves equal to the OD Tubing size for
suction line are required.
Access Valves (Ports)
The access ports in the suction line allow the operating
suction pressure to be checked across the suction line
filter. These ports are usually a Schrader valve with
core.
Frostat Coil Frost Protection
The Frostat™ control is the preferred method of coil
frost protection. The Frostat control bulb is
mechanically attached to the suction line near the
evaporator and wired to the unit control panel. See
field connection diagram for details.
Liquid Line Components
The required liquid line refrigerant components include
a filter drier (Core Type), access valve(s) or (ports),
solenoid valve(s), moisture indicating sight glass,
expansion valve(s), and ball shutoff valve(s). See
Figure 33, p. 47
Liquid Line Filter/Filter Drier (Field Supplied)
Install the filter drier in the liquid line as close as
possible to the expansion valve. Locate them upstream
of the moisture indicator and solenoid valve (if
applicable).
I I n n s s t t a a l l l l a a t t i i o o n n M M e e c c h h a a n n i i c c a a l l
All items numbered
are field supplied.
3. Shutoff Valve
4. Liquid Line
6. Access Port
5. Shutoff
Valve
Filter Drier
for placement location.
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