Sterling QVSF User Manual
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SEPARATED COMBUSTION PROPELLER
UNIT NUMBER DESCRIPTION
Digit #1, 2 - Unit Type [UT]
P3 - Separated Combustion Propeller
Digit #3, 4, 5 - Capacity [CA]
100 - 100,000 BTU/HR
125 - 125,000 BTU/HR
150 - 150,000 BTU/HR
175 - 175,000 BTU/HR
200 - 200,000 BTU/HR
250 - 250,000 BTU/HR
300 - 300,000 BTU/HR
350 - 350,000 BTU/HR
400 - 400,000 BTU/HR
Digit #6 - Furnace Type [FT]
B - Left Side Access
Digit #7 - Heat Exchanger Construction Material [FM]
1 - Aluminized Steel
2 - 409 Stainless Steel
3 - 321 Stainless Steel
Digit #8 - Gas Type [GT]
N - Natural Gas
P - Propane Gas (LP)
K - Natural Gas w/100% Shutoff
Digit #9 - Ignition Control [IC]
2 - Spark Ignition
Digit #10 - Altitude [AL]
A - 0–1,999 ft.
J - 8,000–8,999 ft.
B - 2,000–2,999 ft.
K - 9,000–9,999 ft.
C - 3,000–3,999 ft.
L - 10,000–10,999 ft.
D - 4,000–4,999 ft.
M - 11,000–11,999 ft.
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.
H - 7,000–7,999 ft.
Digit #11 - Gas Control [GC]
A - Single Stage
B - Two Stage
H - Electronic Modulation w/Room Sensing
Digit #12 - Supply Voltage [SV]
1 - 115/1/60 5
- 230/3/60
2 - 208/1/60 6
- 460/3/60
3 - 230/1/60 7
- 575/3/60
4 - 208/3/60
Z - Special
Note: Supply Voltages [SV] 2-7 include fi eld mounted step down transformer.
Digit #13 - Motor Type [MT]
1 - Open Drip Proof
2 - Totally Enclosed
Digit #14 - Blower Motor Sizes [MS]
0 - None/Not Applicable
Digit #15 - Accessories [AS]
FACTORY INSTALLED
A8 - Input Derate
P6 - Summer/Winter Switch
M6 - OSHA Fan Guard
S1 - 409 Stainless Steel Burners
S3 - 409 Stainless Steel Flue Collector
G1 - 1-Stage T87K Mercury Free
Thermostat w/Subase Kit*
G5 - 2-Stage TH5220D Mercury Free
Thermostat w/Subbase*
*These thermostats are factory ready
for fi eld installation (include factory
mounted relay).
† FIELD INSTALLED (AS-____ )
† Field Installed Accessories are not included in the Unit Number. All Field Installed
Accessories are entered as a separate line item using the catalog number which utilizes
“AS” as a prefi x. i.e: A7 becomes AS-A7.
A7 - Pressure Regulator 1/2-2 psi
H5 - Low Ambient Control
G2 - 1-Stage T87K Mercury Free Thermostat M2-1 - Vent Caps (4 inch) (Unit Capacity 100-175)
w/TG511A Guard Kit
M2-2 - Vent Caps (5 inch) (Unit Capacity 200-250)
G3 - 1-Stage T834N Mercury Free Thermostat
M2-3 - Vent Caps (6 inch) (Unit Capacity 300-400)
w/Fan Switch
M3-1 - Adaptors (5-4 inch) (Unit Capacity 100-175)
G6 - Locking Thermostat Cover
M4 - Vertical Concentric Flue Kit
G8 - 1-Stage T6169C Line Voltage Stat
M5 - Horizontal Concentric Flue Kit
w/Subbase
M7 - Two to Four Point Suspension Kit
G9 - 1-Stage T822K Mercury Free
Thermostat
P5 - 24V SPST Relay-Specify Purpose
Q1 - “Y” Splitter Nozzle
Q2 - 30° Nozzle
Q3 - 60° Nozzle
Q4 - 90° Nozzle
Q6 - Vertical Louvers
Digit
X X X X — 1 2 3 4 5 6 7 8 9 10
11
12
13
14
15 +
Item
Prefi
x
UT
CA FT
FM
GT
IC AL
GC
SV
MT
MS AS
(Internal use Only)