Brochure

Series 2: Technical Information
© 2019 U.S. Boiler Company, Inc. - Lancaster, PA
Phone: [phone]
www.usboiler.net
Form No. USBL19071-20ms
Printed in the U.S.A
Series 2 Ratings
Model
Input
1
(MBH)
DOE Heating
Capacity
(MBH)
AHRI
Net Rating
2
(MBH)
AFUE
(%)
202E 38 32 28 84.0
203E 69 58 50 84.0
204E 103 87 76 84.0
205E 138 116 101 84.0
206E 172 145 126 84.0
207E 207 174 151 84.0
208E 241 202 176 84.0
209E 276 232 202 84.0
A
S
M
E
H
NOTE: Boilers are shipped for natural gas combustion only for elevations from sea level to
2000 feet. Conversion kits are required for LP combusion and higher elevations (see chart).
1. Input ratings can be used for elevations up to 2,000 feet. Refer to IO&S manual
appendix “High Altitude Installations” for installations above 2,000 feet.
2. The net AHRI water ratings shown are based on a piping and pickup allowance
of 1.15. The manufacturer should be consulted before selecting a boiler for
installations having unusual piping and pickup requirements, such as
intermittent operation, extensive piping systems, etc.
Series 2 Dimensions (inches)
Model Sections Depth A Vent Gas NPT
202E 2 27 14 3 1/2
203E 3 27 14 4 1/2
204E 4 27 16 5 1/2
205E 5 27 19 6 1/2
206E 6 27 22 6 1/2
207E 7 27 25 7 3/4
208E 8 27 28 7 3/4
209E 9 27 31 8 3/4
Standard Equipment
• Insulated powder coated steel jacket
• Draft hood, damper and
harness
• Heavy gauge 1” base insulation
• Intelligent Hydronic Control – Simple
self-diagnostic control system
with 3-digit readout
• Step-opening redundant gas valve
• Spark ignition with continuous retry
• Stainless steel precision burners
Accessories
• Auxilliary high limit (P/N: 103696-01)
Supply
Gas
Return
27”
18”
16”
6”*
9”
20”
26.5”
0”
0”
Floor Line
32.5”
30”**
A
4” 1”
6” (203E-206E)
8” (207E-209E)
** Add height
required to
maintain 6”
clearance from
all breeching
components.
Vent damper
may be installed
in vertical or
horizontal section
of vent connector
within reach of
vent damper
harness.
* Minimum radial
clearance around draft
hood and vent connector.
NPT - All Models
Supply: 1-1/4”
Return: 1-1/4”
Relief valve: 3/4”
Drain: 3/4”
MAWP - All Models
50 PSI
Series 2 Weights (lbs.) & Volume (gal.)
Model Ship Wt. Empty Wt. Water Content
202E 202 143 1
203E 241 182 2
204E 292 230 3
205E 341 279 4
206E 390 328 5
207E 449 378 6
208E 502 431 7
209E 548 476 8
Conversion Kits
Fuel 0-2000 ft. 2,001-5,400 ft. 5,401-10,000 ft.
Nat.Gas Factory Standard 109697-01 109698-01
LP Gas
109729-01 (2 sections) N/A N/A
109706-01 (3-6 sections) 109699-01 (3-6 sections) 109700-01 (3-6 sections)
109706-02 (7-9 sections) 109699-02 (7-9 sections) 109700-02 (7-9 sections)
• User-friendly wiring with 120V J-box
• LWCO (IDL-1200) pre-installed with
high limit sensor in dual-purpose well
• ECM Circulator – choice of Taco or
Grundfos
• Cast iron section assembly
• Resettable blocked vent switch
• Boiler drain valve
• Cast iron supply manifold with safety
relief valve tapping
• Portable diagnostic display
(P/N: 105917-01)
Closet & alcove installation available on 202E-206E
Alcove installation available on 207E-209E