Sterling MS User Manual
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Item
Prefi
x
UT
CA
FT FM IA CO GT GC SV MT MS AI AC
AS
(Internal use Only)
XVI. UNIT NUMBER DESCRIPTION
SEPARATED COMBUSTION INDOOR MAKE-UP AIR UNITS
1, 2 - Unit Type [UT]
MS - Separated Combustion Indoor Make-up Air Unit
3, 4 - Capacity [CA]
*Single Furnace
Double Furnace
10 - 100,000 BTU/HR
50 - 500,000 BTU/HR.
15 - 150,000 BTU/HR
60 - 600,000 BTU/HR
20 - 200,000 BTU/HR
70 - 700,000 BTU/HR
25 - 250,000 BTU/HR
80 - 800,000 BTU/HR
30 - 300,000 BTU/HR
35 - 350,000 BTU/HR
Triple Furnace
40 - 400,000 BTU/HR
12 - 1,200,000 BTU/HR
*Single furnace capacities 10 through 40 are ETL certifi ed.
5 - Furnace Type [FT]
A - Standard Temperature Rise (20-60°F), Right Side Access
B - Standard Temperature Rise (20-60°F), Left Side Access
C - High Temperature Rise (60-90°F), Right Side Access
D - High Temperature Rise (60-90°F), Left Side Access
0 - None
Z - Other
6 - Furnace Construction Material [FM]
1 - Aluminized Steel
2 - 409 Stainless Steel (First Furnace Only)
3 - 409 Stainless Steel (All Furnace Sections)
4 - 321 Stainless Steel (First Furnace Only)
5 - 321 Stainless Steel (All Furnace Sections)
6 - 409 Stainless Steel Package (First Furnace Only)
7 - 409 Stainless Steel Package (All Furnace Sections)
8 - 321 Stainless Steel Package (First Furnace Only)
9 - 321 Stainless Steel Package (All Furnace Sections)
0 - None
Z - Other
7 - Indoor Arrangement
(includes furnace section(s)
[IA]
A - Duct Furnace (50-12 [CA] only)
K - Blower (High CFM) / Cooling
B - Blower (Standard)
0 - None
D - Blower (Standard) / Evap.
Z - Other
G - Blower (High CFM)
8 - Coil Options [CO]
A - DX Coil, 4 Row Single Circuit
E - Chilled Water Coil, 4 Row
B - DX Coil, 4 Row Dual Circuit
G - Chilled Water Coil, 6 Row
C - DX Coil, 6 Row Single Circuit
0 - None
D - DX Coil, 6 Row Dual Circuit
Z - Other
9 - Gas Type [GT]
1 - Natural Gas
2 - LP Gas (Propane)
3 - Natural Gas w/100% Shutoff
0 - None
10 - Gas Control [GC]
A - Single Stage Gas (Standard)
B - Two Stage Gas
H - Electronic Modulation w/Room Sensing
J - Electronic Modulation w/Duct Sensing
K - Electronic Modulation w/Duct Sensing & Ovrd. Stat
L - Electronic Modulation w/External 4-20 mA Input (Furnace One)
M - Electronic Modulation w/External 4-20 mA Input (All Furnaces)
N - Electronic Modulation w/External 0-10 VDC Input (Furnace One)
P - Electronic Modulation w/External 0-10 VDC Input (All Furnaces)
R - Two Stage Remote Temperature Control w/Duct Sensor
S - Three Stage Remote Temperature Control w/Duct Sensor
T - Four Stage Remote Temperature Control w/Duct Sensor
U - S-350 2 Stage Modular Electronic Control System
W - S-350 3 Stage Modular Electronic Control System
X - S-350 4 Stage Modular Electronic Control System
Y - S-350 6 Stage Modular Electronic Control System
0 - None
Z - Other
11 - 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
0- None
Z - Other
12 - Motor Type [MT]
1 - Open Drip Proof (Standard)
2 - Totally Enclosed
3 - Premium Effi ciency, Open Drip Proof
4 - Premium Effi ciency, Totally Enclosed
0 - None
Z - Other
13 - Motor Sizes [MS]
A - 1/2 HP. w/Contactor
M - 1-1/2 HP. w/Mag. Starter
1 - 1 HP. VFD
B - 3/4 HP. w/Contactor
N - 2 HP. w/Mag. Starter
2 - 1-1/2 HP. VFD
C - 1 HP. w/Contactor
P - 3 HP. w/Mag. Starter
3 - 2 HP. VFD
D - 1-1/2 HP. w/Contactor
R - 5 HP. w/Mag. Starter
4 - 3 HP. VFD
E - 2 HP. w/Contactor
S - 7-1/2 HP. w/Mag. Starter
5 - 5 HP. VFD
G - 3 HP. w/Contactor
T - 10 HP. w/Mag. Starter
6 - 7-1/2 HP. VFD
H - 5 HP. w/Contactor
U - 15 HP. w/Mag. Starter
7 - 10 HP. VFD
J - 1/2 HP. w/Mag. Starter
0 - None
8 - 15 HP. VFD
K - 3/4 HP. w/Mag. Starter
Z - Other
L - 1 HP. w/Mag. Starter
14 - Air Inlet Confi guration [AI]
1 - Outside Air (OA)
4 - Outside Air and Return Air (OA/RA)
2 - Outside Air w/Air Hood*
5 - Outside and Return Air w/Air Hood*
3 - Return Air (RA)
0 - None
Z - Other
15 - Air Control & Damper Arrangement [AC]
A - Outside Air 2 Pos. Motor / Spring Return
B - Return Air 2 Pos. Motor / Spring Return
C - OA/RA 2 Pos. / Spring Return
D - OA/RA Mod. Mtr. w/Mixed Air Control / Min. Pot.
E - OA/RA Mod. Mtr. w/Mixed Air Control / Min. Pot. / SR
G - OA/RA Mod. Mtr. w/Mixed Air Control
H - OA/RA Mod. Mtr. w/Mixed Air Control / SR
J - OA/RA Mod. Mtr. w/Min. Pot.
K - OA/RA Mod. Mtr. w/Min. Pot. / SR
L - OA/RA Mod. Mtr. w/Dry Bulb / Mixed Air Control / Min. Pot.
M - OA/RA Mod. Mtr. w/Dry Bulb / Mixed Air Control / Min. Pot. / SR
N - OA/RA Mod. Mtr. w/Enthalpy Controlled Economizer / SR
P - OA/RA Mod. Mtr. w/Pressure Control (Space Pressure)
Q - OA/RA Mod. Mtr. w/Carbon Dioxide (CO
2
) R/A Monitor
R - OA/RA Mod. Mtr. w/S-350-P Proportional Mixed Air Control / SR
S - OA/RA Mod. Mtr. w/0-10 VDC & 4-20 mA Analog Input (External Input)
T - OA/RA Mod. Mtr. w/0-10 VDC & 4-20 mA Analog Input / SR (External Input)
U - ASHRAE Cycle I (OA/RA 2 Pos. Mtr. w/Warm-up Stat / SR)
W - ASHRAE Cycle II (OA/RA Mod. Mtr. w/Warm-up Stat / Mixed Air / Min. Pot. / SR)
X - ASHRAE Cycle III (OA/RA Mod. Mtr. w/Warm-up Stat / Mixed Air / SR)
Y - Manual Dampers
0 - None
MOD = Modulating Damper Motor
Z - Other
OA = Outside Air RA = Return Air SR = Spring Return
16 - Accessories [AS]
A1 - Moisture Eliminators
H1 - Return Firestat
A2 - Horizontal Return
H2 - Supply Firestat
A3 - Low Leak Damper
H3 - Freezestat w/Time Delay
A6 - High Altitude Unit
H4 - Ambient Lockout
A7 - High Pressure Regulator
A8 - Unit Derate
J1 - Interlock Relay - 24V Coil DPDT 10A, Plug-in
J2 - Interlock Relay - 24/115V Coil SPDT 10A
B1 - Filters - 1" WA (Standard)
J3 - Interlock Relay - 24/115/230V Coil DPDT 10A
B2 - Filters - 2" WA
J4 - Interlock Relay - 24V Coil 4PDT 10A
B3 - Filters - 2" TA
B4 - Filters - 1" 30%
K1 - Manual Reset High Limit Switch†
B5 - Filters - 2" 30%
K2 - High / Low Gas Pressure Limit Switches
K3 - Status Lamp (Elec. Cabinet)
C1 - Evap. Cooler - Fill & Drain Kit
K4 - Fan Time Delay (Arrangement “A” Only)
C2 - Evap. Cooler - 12" CELdek
®
Media
K5 - Air Flow Prove Switch (Dwyer 1910-0)†
C3 - Evap. Cooler - Freezestat
w/o Time Delay
L1 - 30 Amp, Fused Disconnect Switch†
C4 - Evap. Cooler - 8" GLASdek
®
Media
L2 - 30 Amp, Non-fused Disconnect Switch†
C5 - Evap. Cooler - 12" GLASdek
®
Media
L3 - 60 Amp, Fused Disconnect Switch†
L4 - 60 Amp, Non-fuse Disconnect Switch†
D1 - Time Clock - 7 Day†
D2 - Time Clock - 24 Hour†
M2 - Vent Caps†
M3 - Adaptor(s) (4"-5" inches)†
E1 - Clogged Filter Switch
M4 - Vertical Concentric Vent Kit†
E2 - G.F.I. Convenience Outlet 115VAC†
M5 - Horizontal Concentric Vent Kit†
E3 - Remote Control Panel†
E4 - Manual Blower Switch†
N5 - Service Convenience Package
N6 - Double Wall Construction
F1 - Ductstat - One Stage†
F2 - Ductstat - Two Stage†
R1 - Field Installed VFD
R2 - Factory Installed VFD
G1 - Thermostat - T87K w/Subbase†
R3 - VFD Remote Keypad for use w/R1†
G2 - Thermostat - T87K w/Subbase & Guard† R4 - CO
2
Sensor - 100% OA†
G3 - Thermostat - T834N w/Subbase (Sterling Stat)† R5 - CO
2
Sensor - Mixed Air†
G4 - Thermostat - TB8220U - 7 Day Programmable† R6 - Pressure Sensor†
G5 - Thermostat - TH5220D (Two Stage)†
R7 - 2-Speed VFD Relays
G6 - Locking Thermostat Cover†
R8 - 3-Speed VFD Relays
Note: All thermostats are Mercury free
0 - None
Z1- Other (Specify)
† = Field Installed
*Single furnace capacities 10 through 40 are ETL certifi ed.