Trane EarthWise Purge, Installation Instructions Manual

Page: 17 / 20

Installation
PRGF-SVN001B-EN 17
Purge Mounting Location
In the case of units with auxiliary or heat recovery
condensers, the purge must be mounted above the liquid
level of the highest condenser.
Purge Tank Vapor Line
The purge gas line must be connected to both the cooling
and auxiliary or heat recovery condensers. Be sure to pitch
properly.
Shutoff valves must be provided at both condensers so the
line can be closed off from the non-operating condenser.
Refer to
Figure 13 .
Purge Liquid Return Line
The 3/8” liquid return line from the purge tank must be
connected to the auxiliary or the heat recovery condenser
at a point that is below the purge tank outlet connection,
but above the condenser liquid level. Install the standard
3/8” shutoff valve (if not already provided), as previously
described in
“Liquid Return Line,” p. 15 . Refer to Figure 13 .
Purge Exhaust Vent Line
Connect the discharge vent line using 3/8” O.D. black,
nylon, tubing to the connection on the purge exhaust
solenoid valve. The discharge must be at atmospheric
pressure and operate at a minimum pressure drop. A
minimum of a 3/8” line is required. In many cases, this line
will tie into the vent line for the chiller rupture disc.
Figure 13. EarthWise™ purge gas and liquid lines, for
heat recovery or auxiliary condenser units
Liquid Refrigerant Separator
(Optional)
The Liquid Refrigerant Separator allows the EarthWise™
purge to be installed below a chiller’s condenser liquid
level. This may be necessary when space or other
considerations prevent the purge from being installed in
its typical location on top of the condenser. The liquid
refrigerant separator provides the pressure isolation that
is needed to return liquid refrigerant to the evaporator.
Important: The liquid refrigerant separator is not
typically needed when the EarthWise purge
is mounted on top of the chiller condenser
and its refrigerant is returned to the chiller
condenser in the normal prescribed
manner.
Package contents:
Qty Description
1
Liquid Refrigerant Separator
2
1/4-20 x 0.75" screws to mount
Liquid Separator
1
Installation Instructions
Field provided items:
• 1/4” copper tubing
• 3/8” copper tubing
• 5/8” copper tubing
• 5/8” copper “T” tee
• Ball valve for evaporator regeneration line
• Connection fittings for the evaporator regeneration
line
Mounting Procedure
Mount the liquid refrigerant separator to the purge base in
the preferred mounting location as shown in
Figure 15 .
Drill holes into the purge base as necessary or use existing
holes in the purge base.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized. Verify that
no power is present with a voltmeter.
Figure 14. Typical liquid separator installation
Purge Tank
2”
12”
Condenser
Purge Gas
Line
5/8” Ball Valve
7/8” Elbow And
5/8” Reducer
7/8” Steel
Coupling
3/8” Angle
Valve
Maintain a Pitch
of 2”/12” (151 mm/m)
or more
Maintain a Pitch
of 2”/12” (151 mm/m)
or more
SIDE VIEW
FRONT VIEW
5/8” Purge
Gas Line
3/8” Liquid
Return Line
Auxilliary
or Heat
Recovery
Condenser
Standard Chiller
Condenser
7/8” Elbow And
5/8” Reducer
7/8” Steel
Coupling
5/8” Ball
Valve
Liquid
Separator
Purge Suction
Return Line
Chiller
Condenser
Chiller
Evaporator
EarthWise
Purge
Carbon Regeneration
Line Tree
Existing
Purge
Pickup
Existing
Liquid
Line