22
RTAA-IOM-3
Figure 8
Model Number Coding System
RTA A 200 G X B0 1 A 0 D 0 B D E G
01 2
123 4 567 8 9 01 2 3 4 5 6 7 8 9 0 (Digit position for above)
Where digits are assigned the following meanings:
Digit Character
No. Value Description
1, 2, 3 Unit Type/Function
RTA Rotary (Series “R”)
Air Cooled Chiller
4 Development Sequence
A “A” Dev. Sequence
5, 6, 7 Unit Nominal Tons
130 130 Tons
140 140 Tons
155 155 Tons
170 170 Tons
185 185 Tons
200 200 Tons
240 240 Tons
270 270 Tons
300 300 Tons
340 340 Tons
370 370 Tons
400 400 Tons
8 Unit Voltage
D 380/60/3
G 200-230/60/3 Dual
Voltage
1 346/50/3
K 380-415/50/3
4 460/60/3
5 575/60/3
S Special Customer Option
9 Compressor Starter Type
Y Y-Delta
(Closed Transition)
X X-Line
(Across the line)
S Special Customer Option
10, 11 Design Sequence
BO Second design.
Increment when parts
are affected for
service purposes.
12 Evaporator Leaving Temp.
1 Standard 40-60 F
2 Low 20-40 F
3 Ice making 20-60 F
S Special Customer Option
13 Condenser Coil Fin
Material
A Aluminum
B Aluminum with
corrosion protection
S Special Customer Option
Digit Character
No. Value Description
14 Agency Listing
0 No agency listing
1 U.L. listed - Standard
where applicable
2 C.S.A. listed
3 *U.L./C.S.A. listed
S Special Customer Option
15 Control Interface
A Standard Control
No communication
module
B Standard Control
With communication
module
C Deluxe Control
No communication
module
D Deluxe Control
With communication module
Deluxe control option consists
of the following:
A - Cycle counter and
hour meter
B - Under/over voltage
protection
C - Remote alarm contacts
and compressor run
indication
D - % volts
16 Chilled Water Reset
0 None
1 Return water temperature
2 Outside air temperature
3 Zone temperature
S Special Customer Option
17+ Add on Options
A Architectural louvered
panels
B Control power transformer
C Heat recovery
D Low ambient lockout
sensor
E Suction service valves
F Power disconnect
G Low ambient operation
H *Unit sound attenuator
I Remote evaporator
S Special Customer Option
Note:
1. Digits 17 and on may be multiple,
independent add on options.
2. * Denotes that this option assignment has
been made but is not available now
Model Number
Coding System
The model numbers for the outdoor
unit and the compressors are
comprised of numbers and letter which
represent features of the equipment.
Shown on the chart in Figure 8 are
samples of typical unit and compressor
model numbers, followed by the
coding system for each.
Each position, or group of positions, in
the number is used to represent a
feature. For example, in Figure 8,
position 08 of the unit model number,
Unit Voltage, contains the letter “G”.
From the chart, it can be seen that a
“G” in this position means that the unit
voltage is 200-230/60/3 dual voltage.
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