FRONT VIEW RIGHT SIDE VIEW
SEALED COMBUSTION, DIRECT VENT SERIES BOILER
STANDARD EQUIPMENT Boiler Jacket, Cast Iron Boiler Battery, Limit Control, Removable Transformers, Plug in Relay, Theraltimeter Gauge, Circulator (field mounted), Main Gas Burners, Hot
Surface Pilot; A.S.M.E Relief Valve, Drain Cock, Induced Draft Fan, Safety Pressure Switch, and Combination Intake/Exhaust Termination Kit.
All boilers are design certified for installation on non-combustible floors.
For installation on combustible floors, use combustible floor kit.
This boiler is a Direct Vent Designed Certified appliance which requires a
special horizontal through the wall venting system. Only HEAT-FAB
®
SAF-T-
VENT™, FLEX-L
®
STAR-34™, ProTech™ FasNSeal
®
, and Z-FLEX
®
Z-VENT™
venting material products shall be used.
Consult venting addendum for maximum vent lengths and proper configurations.
Electrical service to be 120 Volts, 15 Amps, 60 Hz.
Tested for 100 lbs.
(689.5 kPa) ASME
Working Pressure
3771201 REV: 6.3, September 2004
C. S. A. Certified for
Natural gas or Propane
USC SERIES
Cast IrCast Ir
Cast IrCast Ir
Cast Ir
on,on,
on,on,
on,
Dir Dir
Dir Dir
Dir
ect ect
ect ect
ect
VV
VV
V
ent Sealed Combent Sealed Comb
ent Sealed Combent Sealed Comb
ent Sealed Comb
ustion,ustion,
ustion,ustion,
ustion,
Gas-Fir Gas-Fir
Gas-Fir Gas-Fir
Gas-Fir
ed,ed,
ed,ed,
ed,
Hot Hot
Hot Hot
Hot
WW
WW
W
aa
aa
a
ter Boilerter Boiler
ter Boilerter Boiler
ter Boiler
RATINGS AND DIMENSION
Boiler
A.G.A Heating I=B=R Natural Dimensions Supply & No.
Water AFUE
Input Capacity Net Output Gas Return Of
No.
Btu/Hr. Btu/Hr. Btu/Hr. Inlet A B C D Tappings Burners
Content Ratings
USC3
50,000 44,000 38,000 1/2" 15.1/8" 3.1/2" 3.1/2" 5" 1.1/4"
2
4.0 gals
87%
(14.7 KW) (12.9 KW) (11.1 KW) (1.27 cm) (38 cm) (9 cm) (9 cm) (12.7 cm) (3.2 cm) 15.14 liters
USC4
100,000 87,000 76,000 1/2" 19" 3.1/2" 3.1/2" 6.1/2" 1.1/4"
3
5.6 gals
87%
(29.3 KW) (25.5 KW) (22.3 KW) (1.27 cm) (48 cm) (9 cm) (9 cm) (16.5 cm) (3.2 cm) 21.20 liters
USC5
140,000 122,000 107,000 1/2" 22.7/8" 4.1/4" 4.1/8" 8.3/8" 1.1/4"
4
7.2 gals
87%
(41.0 KW) (35.7 KW) (31.3 KW) (1.27 cm) (58 cm) (11 cm) (11 cm) (21.3 cm) (3.2 cm) 27.25 liters
NOTE: For altitudes above 2,000 ft. ratings should be reduced at the rate of 4% for each 1,000 ft. above sea level.