Trane Rtaaiom3 Manual

							61RTAA-IOM-3
Figure 35
Typical Field Wiring for
RTAA Packaged Unit –
240-400 Tons(Continued on Next Page) 
						

							62RTAA-IOM-3
Figure 35 (Continued from Previous Page)
Typical Field Wiring for
RTAA Packaged Unit –
240-400 Tons(Continued on Next Page)
See Notes on Previous Page 
						

							63RTAA-IOM-3
(Continued from Previous Page)
See Notes on Page 61 
						

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Figure 36
Typical Field Wiring for
RTAA With Remote
Evaporator Option(Continued on Next Page) 
						

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(Continued from Previous Page)
See Notes on Page 61 
						

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Figure 36 (Continued from Previous Page)
Typical Field Wiring for
RTAA With Remote
Evaporator Option 
						

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Table 10
Electrical Data
Unit Wiring Motor DataFans (Ea)Rated MCA (3) Rec Time Comp. (Ea) Qty. Qty.
Unit Size Voltage Ckt1/Ckt2(1) MOP(2) Delay or RDE4) Qty. RLA(5) LRA(8) (11) (12) kW FLA kW(7)
RTAA 130 200 383/389 600/600 500/500 2 280/280 1689/1689 10 11 1.3 6.5 0.8
230 383/389 600/600 500/500 2 280/280 1689/1689 10 11 1.3 6.5 0.8
460 306 400 350 2 122/122 633/633 10 11 1.3 2.8 0.8
575 246 300 300 2 98/98 512/512 10 11 1.3 2.3 0.8
RTAA 140 200 383/389 600/600 500/500 2 280/280 1689/1689 10 11 1.3 6.5 0.8
230 383/389 600/600 500/500 2 280/280 1689/1689 10 11 1.3 6.5 0.8
460 306 400 350 2 122/122 633/633 10 11 1.3 2.8 0.8
575 246 300 300 2 98/98 512/512 10 11 1.3 2.3 0.8
RTAA 155 200 422/389 700/600 500/500 2 306/280 2044/1689 11 12 1.3 6.5 0.8
230 422/389 700/600 500/500 2 306/280 2044/1689 11 12 1.3 6.5 0.8
460 322 450 400 2 133/122 766/633 11 12 1.3 2.8 0.8
575 260 350 300 2 107/98 611/512 11 12 1.3 2.3 0.8
RTAA 170 200 515/389 800/600 700/500 2 375/280 2391/1689 12 13 1.3 6.5 0.8
230 515/389 800/600 700/500 2 375/280 2391/1689 12 13 1.3 6.5 0.8
460 363 500 450 2 163/122 896/633 12 13 1.3 2.8 0.8
575 292 400 350 2 131/987 25/512 12 13 1.3 2.3 0.8
RTAA 185 200 515/428 800/700 700/600 2 375/306 2391/2044 13 14 1.3 6.5 0.8
230 515/428 800/700 700/600 2 375/306 2391/2044 13 14 1.3 6.5 0.8
460 376 500 450 2 163/133 896/766 13 14 1.3 2.8 0.8
575 303 400 350 2 131/107 725/611 13 14 1.3 2.3 0.8
RTAA 200 200 514/514 800/800 700/700 2 375/375 2391/2391 14 14 1.3 6.5 0.8
230 514/514 800/800 7001700 2 375/375 2391/2391 14 14 1.3 6.5 0.8
460 406 500 450 2 163/163 896/896 14 14 1.3 2.8 0.8
575 327 450 400 2 131/131 725/725 14 14 1.3 2.3 0.8
RTAA 240 460 303/224 400/350 350/300 3 122-122/163 633-633/896 N/A 17 1.3 2.8 1.0
575 244/180 300/300 300/225 3 98-98/131 512-512/725 N/A 17 1.3 2.3 1.0
RTAA 270 460 360/224 500/350 450/300 3 163-122/163 896-633/896 N/A 19 1.3 2.8 1.0
575 290/180 400/300 350/225 3 131-98/131 725-512/725 N/A 19 1.3 2.3 1.0
RTAA 300 460 406/224 500/350 450/300 3 163-163/163 896-896/896 N/A 21 1.3 2.8 1.0
575 327/180 450/300 400/225 3 131-131/131 725-725/725 N/A 21 1.3 2.3 1.0
RTAA 340 460 303/406 400/500 350/450 4 122-122/163-163 633-633/896-896 N/A 24 1.3 2.8 1.0
575 244/327 300/450 300/400 4 98-98/131-131 512-512/725-725 N/A 24 1.3 2.3 1.0
RTAA 370 460 360/406 500/500 450/450 4 163-122/163-163 896-633/896-896 N/A 26 1.3 2.8 1.0
575 290/327 400/450 350/400 4 131-98/131-131 725-512/725-725 N/A 26 1.3 2.3 1.0
RTAA 400 460 406/406 500/500. 450/450 4 163-163/163-163 896-896/896-896 N/A 28 1.3 2.8 1.0575 327/327 450/450 400/400 4 131-131/131-131 725-725/725-725 N/A 28 1.3 2.3 1.0
Notes:
(1) Low voltage units (200 & 230 volt) require separate power connections for each circuit.
(2) MOP - Maximum Overcurrent Protection - may be either fused (UL/CSA) or with circuit breakers (CSA only).
MOP = 225 percent of the largest compressor RLA plus 100 percent of the second compressor RLA plus the sum of the condenser fans
FLAs per NEC 440-22.
(3) MCA - Minimum Circuit Ampacity - 125 percent of largest compressor RLA plus 100 percent of second compressor plus the sum of the
condenser fans FLAs per NEC 440-33.
(4) RECOMMENDED TIME DELAY OR DUAL ELEMENT (RDE) FUSE SIZE: 150 percent of the largest compressor RLA plus 100 percent of the
second compressor RLA and the sum of the condenser tan FLAs.
(5) RLA - Rated Load Amps - rated in accordance with UL Standard 465.
(6) Local codes may take precedence.
(7) Control kW includes operational controls only. Does not include heat tapes.
(8) LRA - Locked Rotor Amps - based on full winding start units.
(9) VOLTAGE UTILIZATION RANGE:
Rated Voltage Utilization Range
200 180-220
230 208-254
460 414-506
575 516.633
(10) A 11 5/60/1, 15 amp. customer provided power connection is required to operate the unit controls. A separate 115(60/1, 15 amp. customer
provided power connection is also needed to power the evaporator heat tape (RTAA 130-200 = 420 watts, RTAA 240-400 = 840 wafts @
120 volts) and optional Domestic Water Heater (420 watts @ 120 volts.). If the optional control power  is used, the customer needs only to
provide a power connection for the heat tapes.
(11) 15 F minimum starting/operating ambient.
(12) 0 F minimum starting/operating ambient 
						

							68RTAA-IOM-3
 CAUTION:
IT IS IMPERATIVE THAT
L1-L2-L3 IN THE STARTER BE
CONNECTED IN THE A-B-C
PHASE SEQUENCE TO
PREVENT EQUIPMENT
DAMAGE DUE TO REVERSE
ROTATION.
Installer-Supplied
Components
Caution: Customer wiring interface
connections are shown in the
electrical schematics and
connection diagrams that are
shipped with the unit.
The installer must provide the
following components if not ordered
with the unit:
[  ] Power supply wiring (in conduit) for
all field-wired connections.
[  ] All control (interconnecting) wiring
(in conduit) for field supplied
devices.
[  ] Fused-disconnect switches.
[  ] Power factor correction capacitors.
Remote Evaporator Only:Control wiring between the outdoor
unit and the evaporator terminal box.
Power Supply Wiring
General
All power supply wiring must be sized
and selected accordingly by the project
engineer in accordance with NEC Table
31016.
WARNING: To prevent injury or
death, disconnect electrical
power source before completing
wiring connections to the unit.
All wiring must comply with local
codes and the National Electrical Code.
The installing (or electrical) contractor
must provide and install the system
interconnecting wiring, as well as-the
power supply wiring. It must be
properly sized and equipped with the
appropriate fused disconnect switches.
The type and installation location(s) of
the fused disconnects must comply
with all applicable codes.
Caution: Use only copper
conductors for terminal
connections to avoid corrosion or
overheating.
Remove the plate on the lower right
side of the power connection panel and
cut holes for the appropriately-sized
wiring conduits. The wiring is passed
through these conduits and connected
to the terminal blocks or optional unit-
mounted disconnect. Refer to Figure 1
and Figures 34 thru 36.
To provide proper phasing of 3-phase
input, make connections as shown in
Figures 34 thru 36 and as stated on the
yellow WARNING label in the starter
panel. For additional information on
proper phasing, refer to “Unit Voltage
Phasing Proper equipment ground
must be provided to each ground
connection in the panel (one on 460/
575 volt units and two on 200/230 volt
units).
Control Power Supply
If the unit is equipped with the optional
control power transformer, it is not
necessary to provide control power
voltage to the unit.
Caution: 200/230 volt units are
factory connected as 200 volt units.
For 230 volt units, the leads must
be moved to the appropriate
terminals on the transformer (1T1).
See Unit Wiring Diagrams.
If the transformer is not provided,
connect control power (115V, 750VA, 15
amp maximum fuse size) to terminals
1TB3-1 and 1TB3-2, on 130-200 units.
Use 1TB3-1 and 1TB4-1 on 240-400
units.
Heat Tape Power Supply
(Packaged Units Only)
Note: Units with the Remote
Evaporator option do not have heat
tape.
The evaporator shell and optional
Domestic Water Heater are insulated
from ambient air and protected from
freezing temperatures by a
thermostatically-controlled heat tape.
Whenever the water temperature
drops to approximately 37 F, the
thermostat energizes the heat tape. The
heat tape will provide protection from
ambient temperatures down to -20 F.
Provide an independent power source
(115V, 15 amp), with a fused-
disconnect. The heat tape is factory
wired back to the unit control panel.
Customer connections are made on
terminal strip 1TB3-11 and 1TB3-12 on
130-200 units or 1TB3-10 and 1TB4-1 0
on 240-400 units.
Water Pump Power Supply
Provide power supply wiring with
fused disconnect for the chilled water
pump(s).
Auxiliary Heat Tape Power Supply
Provide power wiring and properly
sized fused-disconnect for any electrical
heat tape installed on the system water
piping. 
						

							69RTAA-IOM-3
Interconnecting Wiring
Chilled Water Pump Interlock
and External Auto/Stop for
Model RTAA Air-Cooled
Series R CenTraVac
Caution: The following must be
adhered to or equipment damage
may occur.
The Model RTAA Series R chiller
requires a minimum of two field-
supplied control inputs:
• Chilled water pump interlock (TB3-1, -
2 on the 1U1 board).
• External Auto/Stop (T133-3, -4 on the
1U1 board)
When there is a command to shut
down the chilled water system, the
chilled water pump is required to
operate for a minimum of one minute
after the External AUTO/STOP gives
the shutdown command.
Normally, when the compressors are
terminating a cycle (via chiller Stop/
Reset switch, loss of load, Low
Ambient Run Inhibit or External Auto/
Stop), the controller will initiate the
“Run:Unload” mode. This operating
mode energizes the unload solenoid
for 20 seconds, to unload the
compressor so that it will be unloaded
for the next start-up. Then the master
oil solenoid is de-energized and closure
of the master oil solenoid is verified.
The entire process may take up to 40
seconds.
If the chilled water pump interlock is
used without the external Auto/Stop
input, the chiller will shut down
immediately upon the command for
shut down, without initiating the
“Run:Unload” mode. This is
considered a “non-friendly” shut down
and a “Machine Auto Reset” diagnostic
will be displayed on the LICK
Caution: The method in the
previous paragraph is not to be
used as a normal means of cycling
the chiller off, e.g. time clock,
building automation system, etc.
The proper method for cycling the
chiller off is to open a set of contact
between TB3-3, -4 on the 1U1 board
(External Auto/Stop). Then, following a
one minute delay, the chilled water
pump is cycled off. Chilled water flow
indication should be provided between
TB3-1, -2 on the 1U1 board, e.g. water
pump motor starter auxiliaries and/or
flow switch.The wiring for this recommendation is
shown in the furnished electrical
schematics and connection diagrams.
Relay 5DL1 is a normally-open,
instantaneous close, timed open (1
min.) time delay relay. An alternative
solution is to provide proper
programming in a building automation
system.
Chilled Water Pump Interlock
The installer must provide leads 520
and 521 from the chilled water pump
(5B1) starter auxiliary (5K1) to the
proper terminals of terminal strip 1U1
TB3 on the UCM, as shown in Figures
34 thru 36. Circuit requirement is 115
VAC, with minimum contact rating @
115 VAC of 6.9 VA inrush, 1.3 VA sealed.
Refer to the field diagrams which are
shipped with the unit.
The auxiliary contact of the chilled
water pump may be wired in series
with an optional flow switch, as shown.
The standard UCM provides internal
protection for the unit against loss of
chilled water flow. Also refer to
“Evaporator Flow Switch.”
External Auto/Stop Wiring
If the unit requires the Auto/Stop
function, the installer must provide
leads 522 and 523 from the remote
contacts (5K5, 5K21) to the proper
terminals of the terminal strip 1U1 TB3
on the UCM, as shown in Figures 34
thru 36.
The chiller will run normally when the
contacts are closed. When either
contact opens, the compressor(s), if
operating, will go to the RUN:UNLOAD
operating mode and cycle off. Unit
operation will be inhibited. Re-closure
of the contacts will permit the unit to
automatically return to normal
operation.
Circuit requirements are 2-wire, 115
VAC, with minimum contact rating @
115 VAC of 6.9 VA inrush, 1.3 VA sealed.
Refer to the field diagrams which are
shipped with the unit. 
						

							70RTAA-IOM-3
Alarm/Running/Maximum
Capacity Outputs
Terminals 1 to 8 on terminal strip TB4
of the 1U1 board provide a variety of
contact outputs. These are dependent
upon the setting of Menu Item 4E and
its relationship to diagnostics,
compressors operating and the system
operating at full capacity.
Table 11
Alarm/Running/Maximum
Capacity Relay Output
Configurations
Relay Output Configuration1: RLY 1 = Alarm
RLY 2 = Compressor Running
RLY 3 = Maximum Capacity
2: RLY 1 = Circuit I Alarm
RLY 2 = Circuit 2 Alarm
RLY 3 = Maximum Capacity
3: RLY 1 = Alarm
RLY 2 = Circuit 1 Running
RLY 3 = Circuit 2 Running
As shown in Figure 37, there are three
relays. Relays 1 and 2 have SPDT
contacts. Relay 3 has SPST normally
open contacts. The relays can provide
three different output configurations, as
shown in Table 11, and each
configuration offers four choices as to
how the alarm relay is to respond to a
set of diagnostics.
Table 12 shows the twelve settings
available in Menu Item 4E and the
diagnostics which are issued for each
set of conditions.
Figure 37
Alarm/Running/Maximum
Capacity Contact Outputs
Table 12
Alarm/Running/Maximum Capacity Menu Settings
Diagnostics that the
Relays Output Alarm Relay(s) is Active
Menu Item 4E Configuration MMR/ MAR/
Setting (Table 11) CMR diag. CAR diag. IFW diag.
1 1 YES NO NO
2 1 YES YES NO
3 1 YES YES YES
4 1 YES NO YES
5 2 YES NO NO
6 2 YES YES NO
7 2 YES YES YES
8 2 YES NO YES
9 3 YES NO NO
10 3 YES YES NO
11 3 YES YES YES
12 3 YES NO YES
Notes:
MMR = Machine Manual Reset
CMR = Circuit Manual Reset
MAR = Machine Auto Reset
CAR = Circuit Auto Reset
IFW = Informational Warnings