Trane Rtaaiom3 Manual

							31RTAA-IOM-3
Additional Location Requirements
for Remote Evaporator Only
The remote evaporator must be
installed indoors, unless:
– ambient temperatures are always
above 32 F.
– the system circulating liquid is a non-
freezing glycol-type solution, selected
for the prevailing ambient
temperatures.
– the evaporator is protected from
freezing by properly installed and
applied insulation and heat tape.
Caution: To prevent internal
damage due to freezing, do not
install the outdoor unit without
adequate freeze protection.
The remote evaporator should be
mounted on a base of suitable strength
to support the operating weight.
Remote evaporator weights and
mounting locations are shown in
Figure 13.
The remote evaporator must be level
when installed. Be sure to allowadequate clearance for water and
refrigerant piping connections,
performance of service procedures,
reading of gauges and thermometers,
and operation of valves. Space must be
allowed at one end of the evaporator to
pull tubes, if required.
Drainage
Provide a large capacity drain for water
vessel drain-down during shutdown or
repair. The evaporator is provided with
a drain connection. Refer to
“Evaporator Drain”. All local and
national codes apply. The vent on the
top of the evaporator is provided to
prevent a vacuum by allowing air into
the evaporator for complete drainage. 
						

							32RTAA-IOM-3
Rigging
The Model RTAA chiller should be
moved by lifting. Refer to Figures 14
thru 17 for typical unit lifting and
operating weights. Refer to the rigging
diagram that ships with each unit for
specific “per unit” weight data.
WARNING: To prevent injury or
death and unit damage, capacity
of lifting equipment must exceed
unit lifting weight by an
adequate safety factor.
Lifting Procedure
Caution: To prevent damage do not use
a forklift to lift the unit.
[ ] Install clevis connectors through the
four, six or eight lifting plates
provided on the unit (Figures 14
thru 17).
WARNING: To prevent injury or
death and unit damage, use the
lifting method shown in Figures
14 and 17.
[ ] Attach lifting chains or cables to
clevis connectors. Each cable alone
must be strong enough to lift the
chiller.
[ ] Attach cables to lifting beam. Total
lifting weight, lifting weight
distribution and required lifting
beam dimensions are shown in
Figures 14 thru 17 and on the
rigging diagram shipped with each
unit. Lifting beam crossbars must be
positioned so lifting cables do not
contact the sides of the unit.
Caution: To prevent unit damage,
position lifting beam so that cables
do not contact the unit. 
						

							33RTAA-IOM-3
Figure 14
Rigging and Lifting Weights for
RTAA Packaged Unit
NOTES:
1. LIFTING CHAINS (CABLES) WILL NOT BE THE SAME LENGTH. ADJUST TO
KEEP UNIT LEVEL WHILE LIFTING.
2. DO NOT FORK LIFT UNIT.
3. WEIGHTS ARE TYPICAL FOR UNITS WITH R-22 CHARGE.
4. DEDUCT 740 FROM TOTAL WEIGHT FOR UNITS WITHOUT
ARCHITECTURAL LOUVER PANELS.130-200 Tons
without Domestic Water Heater
NOTES:
1. LIFTING CHAINS (CABLES) WILL NOT BE THE SAME LENGTH. ADJUST TO
KEEP UNIT LEVEL WHILE LIFTING.
2. DO NOT FORK LIFT UNIT.
3. WEIGHTS ARE TYPICAL FOR UNITS WITH R-22 CHARGE.
4. DEDUCT 740 FROM TOTAL WEIGHT FOR UNITS WITHOUT
ARCHITECTURAL LOUVERED PANELS.
130-200 Tons
with Domestic Water Heater
RTAA-SA-2001C
RTAA-SA-2007A 
						

							34RTAA-IOM-3
Figure 15
Rigging and Lifting Weights for
RTAA Packaged Unit – 240-300 Tons
NOTES:
1. LIFTING CHAINS (CABLES) WILL NOT BE THE SAME LENGTH.
ADJUST TO KEEP UNIT LEVEL WHILE LIFTING.
2. DO NOT FORK LIFT UNIT.
3. WEIGHTS ARE TYPICAL FOR UNITS WITH R-22 CHARGE.
4. DEDUCT 1166 FROM TOTAL WEIGHT FOR UNITS WITHOUT
ARCHITECTURAL LOUVER PANELS.
NOTES:
1. LIFTING CHAINS (CABLES) WILL NOT BE
THE SAME LENGTH. ADJUST TO KEEP
UNIT LEVEL WHILE LIFTING.
2. DO NOT FORK LIFT UNIT.
3. WEIGHTS ARE TYPICAL FOR UNITS
WITH R-22 CHARGE.
4. DEDUCT 1480 FROM TOTAL WEIGHT
FOR UNITS WITHOUT ARCHITECTURAL
LOUVERED PANELS.
Figure 16
Rigging and Lifting Weights for RTAA
Packaged Unit – 340-400 TonsRTAA-SA-2005B
RTAA-SA-2006B 
						

							35RTAA-IOM-3
Figure 17
Rigging and Lifting Weights for
RTAA Outdoor Unit with
Remote Evaporator Option
NOTES:
1. LIFTING CHAINS (CABLES) WILL NOT BE
THE SAME LENGTH. ADJUST TO KEEP
UNIT LEVEL WHILE LIFTING.
2. DO NOT FORK LIFT UNIT.
3. WEIGHTS ARE TYPICAL FOR UNITS
WITH R-22 CHARGE.
4. DEDUCT 740 FROM TOTAL WEIGHT FOR
UNITS WITHOUT ARCHITECTURAL
LOUVER PANELS. 
						

							36RTAA-IOM-3
Unit Isolation and
Leveling
For additional reduction of sound and
vibration, use one of the two mounting
methods outlined below:
1. Construct an isolated concrete pad
for the unit or provide concrete
footings at each of the eight unit
mounting points. Mount the unit
directly to the concrete pads or
footings. Level the unit using the
base rail as a reference. The unit
must be level within 1/4 over the
entire length. Use shims as
necessary to level the unit.
2. Install the optional spring isolators at
each of the eight/ten unit mounting
points. Refer to Figures 18 thru 21 for
isolator placement locations and
loading information.
a. Secure the isolators to the
mounting surface, using the
mounting slots in the isolator base
plate. Do not fully tighten the
isolator mounting bolts at this
time.
b. Positioning pins are located on the
top of each isolator, as shown in
Figures 18 thru 21. Lower the unit
on to the isolators so that the pins
register with the unit mounting
holes.
c. The weight of the unit will force
the upper housing of each isolator
down. This may cause the upper
housing to contact the lower
housing. As shown in Figures 18
thru 21, the clearances between
upper and lower housings must be
1/4 to 1/2 inch. If the clearance on
any isolator is greater than 1/2
inch, it will be necessary to use
shims or grout to achieve the
required clearance.
d. Minor adjustments can be made
to the clearance by turning the
leveling bolt; clockwise to increase
the clearance and
counterclockwise to decrease the
clearance. All eight isolators must
be supporting the entire weight of
the unit while these adjustments
are being made.Note: If proper clearances cannot be
achieved using the leveling bolts, use
shims or grouting under the isolators,
as required. Isolators must not straddle
small gaps in the shims or grout.
e. Before tightening the mounting
bolts, level the unit using the unit
base rail as a reference. The unit
must be level within 1/4 over the
entire length. Use the leveling
bolts and/or additional shims or
grout to level the unit.
Evaporator Water Piping
Thoroughly flush all water piping to the
unit before making the final piping
connections to the unit.
Caution: If using an acidic
commercial flushing solution,
construct a temporary bypass
around the unit to prevent damage
to internal components of the
evaporator.
Caution: To avoid possible
equipment damage, do not use
untreated or improperly treated
system water.
When completing the NPT-type water
connections, apply a suitable pipe
sealant, or Teflon tape, to prevent water
leakage. To minimize heat gain and to
prevent condensation, insulate all
piping.
Caution: Avoid overtightening and
possible damage of water
connections. The lubricating
properties of Teflon tape make the
possibility of overtightening more
likely. 
						

							37
RTAA-IOM-3
RTAA-SA-2000B
Figure 18 
Spring Isolator Placement for
Typical RTAA Packaged Unit – 130 to 200 Tons 
without Domestic Water Heater 
						

							38
RTAA-IOM-3
RTAA-SA-2002C
Figure 19 
Spring Isolator Placement for
Typical RTAA Packaged Unit – 240-400 Tons 
						

							39
RTAA-IOM-3
RTAA-SA-2003A
Figure 20 
Spring Isolator Placement for
Typical RTAA Outdoor Unit with 
Remote Evaporator Option 
						

							40
RTAA-IOM-3
RTAA-SA-2008A
Figure 21 
Spring Isolator Placement for 
Typical RTAA Unit with Heat Recovery 
Domestic Water Heater