Sterling QVSB - Manual (Page 29)

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Digit #1, 2 - Unit Type [UT] Digit #13 - Motor Type [MT]
B3 - Separated Combustion Blower 1 - Open Drip Proof
2 - Totally Enclosed
Digit #3, 4, 5 - Capacity [CA] 3 - Premium Efficiency, Open Drip Proof
100 - 100,000 BTU/HR 4 - Premium Efficiency, Totally Enclosed
125 - 125,000 BTU/HR
150 - 150,000 BTU/HR Digit #14 - Blower Motor Sizes [MS]*
175 - 175,000 BTU/HR A - 1/4 HP w/Contactor M - 3/4 HP
200 - 200,000 BTU/HR B - 1/3 HP w/Contactor N - 1 HP
225 - 225,000 BTU/HR C - 1/2 HP w/Contactor P - 1/2 HP w/Magnetic Starter
250 - 250,000 BTU/HR D - 3/4 HP w/Contactor R - 3/4 HP w/Magnetic Starter
300 - 300,000 BTU/HR F - 1 HP w/Contactor S - 1 HP w/Magnetic Starter
350 - 350,000 BTU/HR G - 1-1/2 HP w/Contactor T - 1-1/2 HP w/Magnetic Starter
400 - 400,000 BTU/HR H - 2 HP w/Contactor U - 2 HP w/Magnetic Starter
J - 1/4 HP W - 1/4 HP w/Magnetic Starter
Digit #6 - Furnace Type [FT] K - 1/3 HP Y - 1/3 HP w/Magnetic Starter
B - Left Side Access L - 1/2 HP
*Notes: 1. All 3-phase units [SV = 4, 5, 6, 7] include a contactor as standard.
Digit #7 - Heat Exchanger Construction Material [FM] 2. All single phase units [SV = 1, 2, 3] include a contactor for units equipped with
1 - Aluminized Steel 1-1/2 HP. motor or higher [MS = G, H]
2 - 409 Stainless Steel 3. [MS] options J, K, L, M, N only available with single phase supply voltage [SV = 1, 2, 3].
3 - 321 Stainless Steel
Digit #15 - Accessories [AS]
Digit #8 - Gas Type [GT]
N - Natural Gas FACTORY INSTALLED
P - Propane Gas (LP) A8 - Input Derate S1 - 409 Stainless Steel Burners
K - Natural Gas w/100% Shutoff S3 - 409 Stainless Steel Flue Collector
M8 - Discharge Duct Flange
Digit #9 - Ignition Control [IC]
2 - Spark Ignition P4 - Terminal Block Wiring
P6 - Summer/Winter Switch
Digit #10 - Altitude [AL]
A - 0-1,999 ft. J - 8,000-8,999 ft. † FIELD INSTALLED (AS-____ )
B - 2,000-2,999 ft. K - 9,000-9,999 ft. ! Field Installed Accessories are not included in the Unit Number. All Field Installed
C - 3,000-3,999 ft. L - 10,000-10,999 ft. Accessories are entered as a separate line item using the catalog number which utilizes
D - 4,000-4,999 ft. M - 11,000-11,999 ft. “AS” as a prefix. i.e: A7 becomes AS-A7.
F - 5,000-5,999 ft. N - Local Gas Supplier Derate
G - 6,000-6,999 ft. P - Canadian High Altitude 2,000-4,500 ft. A7 - Pressure Regulator 1/2-2 psi H5 - Low Ambient Control
H - 7,000-7,999 ft.
F1 - 1-Stage T675A Ductstat M2-1 - Vent Caps (4") (Unit Capacity 100-175)
Digit #11 - Gas Control [GC] F2 - 2-Stage T678A Ductstat M2-2 - Vent Caps (5") (Unit Capacity 200-250)
A - Single Stage M2-3 - Vent Caps (6") (Unit Capacity 300-400)
B - Two Stage G1 - 1-Stage T87K Mercury Free Thermostat M3-1 - Adaptors (5"-4") (Unit Capacity 100-175)
H - Electronic Modulation w/Room Sensing w/Subbase Kit M4 - Vertical Concentric Flue Kit
J - Electronic Modulation w/Duct Sensing G2 - 1-Stage T87K Mercury Free Thermostat M5 - Horizontal Concentric Flue Kit
K - Electronic Modulation w/Duct Sensing & Room Override Stat w/TG511A Guard Kit M7 - 2 to 4 Point Suspension Kit
L - Electronic Modulation w/External 4-20 mA Input G3 - 1-Stage T834N Mercury Free
N - Electronic Modulation w/External 0-10 VDC Input Thermostat w/Fan Switch P5 - 24V SPST Relay-Specify Purpose
G5 - 2-Stage TH5220D Mercury Free
Digit #12 - Supply Voltage [SV] Thermostat w/Subbase Q1 - "Y" Splitter Nozzle
1 - 115/1/60 5 - 230/3/60 G6 - Locking Thermostat Cover Q2 - 30 Degree Nozzle
2 - 208/1/60 6 - 460/3/60 G8 - 1-Stage T6169C Line Voltage Stat Q3 - 60 Degree Nozzle
3 - 230/1/60 7 - 575/3/60 w/Subbase Q4 - 90 Degree Nozzle
4 - 208/3/60 Z - Special G9 - 1-Stage T822K Mercury Free Q5 - Poly Tube Adaptor (Unit Capacity 150-400)
Note: Supply Voltages [SV] 2-7 include field mounted step down transformer. Thermostat Q6 - Vertical Louvers
SEPARATED COMBUSTION BLOWER
UNIT NUMBER DESCRIPTION
SEPARATED COMBUSTION BLOWER
UNIT NUMBER DESCRIPTION