RT-SVX072A-EN
7
Model Number Description
20 to 75 Tons, Air Cooled
Digit 1 — Unit Type
S = Self-Contained (Packaged Rooftop)
Digit 2 — Unit Function
A = DX Cooling, No Heat
E = DX Cooling, Electric Heat
F = DX Cooling, Natural Gas Heat
L = DX Cooling, Hot Water Heat
S = DX Cooling, Steam Heat
X = DX Cooling, No Heat, Extended Casing
Digit 3 — System Type
H = Single Zone
Digit 4 — Development Sequence
M = Sixth
Digit 5, 6, 7 — Nominal Capacity
*20 = 20 Ton Air Cooled
*25 = 25 Ton Air Cooled
*30 = 30 Ton Air Cooled
*40 = 40 Ton Air Cooled
*50 = 50 Ton Air Cooled
*55 = 55 Ton Air Cooled
*60 = 60 Ton Air Cooled
*70 = 70 Ton Air Cooled
*75 = 75 Ton Air Cooled
Digit 8 — Voltage Selection
4 = 460/60/3 XL
5 = 575/60/3 XL
C = 380/50/3 XL
D = 415/50/3 XL
E = 200/60/3 XL
F = 230/60/3 XL
Note: SEH units (units with electric heat)
utilizing 200V or 230V require dual
power source.
Digit 9 — Heating Capacity
Note: When the second digit is “F” (Gas
Heat), the following applies: (M and T
are available ONLY on 50 ton and
above).
H = High Heat — 2-Stage
K = Low Heat — Ultra Modulating
L = Low Heat — 2-Stage
M = Low Heat — Modulating
0 = No Heat
P = High Heat — Modulating
T = High Heat — Ultra Modulating
Note: When the second digit is “E” (Electric
Heat), the following applies:
D = 30 kW
H = 50 kW
L = 70 kW
N = 90 kW
Q = 110 kW
R = 130 kW
U = 150 kW
V = 170 kW
W = 190 kW
Note: When the second digit is “L” (Hot
Water) or “S” (Steam) Heat, one of the
following valve size values must be in
Digit 9:
High Heat Coil
1 = 0.50 inch
2 = 0.75 inch
3 = 1.00 inch
4 = 1.25 inches
5 = 1.50 inches
6 = 2.00 inches
Low Heat Coil
A = 0.50 inch
B = 0.75 inch
C = 1.00 inch
D = 1.25 inches
E = 1.50 inches
F = 2.00 inches
Digit 10 — Design Sequence
* = Current
Note: Sequence may be any letter A through
Z, or any digit 1 through 9.
Digit 11— Relief/Return Option
0 = None
1 = Barometric
3 = Relief 3 HP with Statitrac
4 = Relief 5 HP with Statitrac
5 = Relief 7.5 HP with Statitrac
6 = Relief 10 HP with Statitrac
7 = Relief 15 HP with Statitrac
8 = Relief 20 HP with Statitrac
9 = Return 3 HP with Statitrac
M = Return 5 HP with Statitrac
N = Return 7.5 HP with Statitrac
P = Return 10 HP with Statitrac
R = Return 15 HP with Statitrac
T = Return 20 HP with Statitrac
Digit 12— Relief/Return Air Fan Drive
(Relief/Return Fan)
0 = None
4 = 400 RPM
5 = 500 RPM
6 = 600 RPM
7 = 700 RPM
8 = 800 RPM
9 = 900 RPM
A = 1000 RPM
B = 1100 RPM
(Return Fan Only)
C = 1200 RPM
D = 1300 RPM
E = 1400 RPM
F = 1500 RPM
G = 1600 RPM
H = 1700 RPM
J = 1800 RPM
K = 1900 RPM
Digit 13 — Filter (Pre DX/Final)
A = Throwaway
B = Cleanable Wire Mesh
C = High Efficiency Throwaway
D = Bag with Prefilter
E = Cartridge with Prefilter
F = Throwaway Filter Rack (Filter not
included)
G = Bag Filter Rack (Filter Not Included)
H = Standard Throwaway Filter/Cartridge
Final Filters
J = High Efficiency Throwaway Filter/
Cartridge Final Filters
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