™
RAYTHERM
COMMERCIAL BOILERS AND WATER HEATERS
T H E F I R S T A N D S T I L L T H E B E S T
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FEATURES
Rugged
All-Bronze
Headers
Finned Copper
Tube Heat
Exchanger
Combination
Modulating
Valves
Corrosion
Resistant Steel
24-Volt Controls
are totally enclosed for
protection. Door is
Floating Return
Header
fittings are brush-
galvanized against
rust. Heat shields are
corrosion-resistant
steel. Jacket has
Polytuf powder coat
finish.
immunizes heat
exchanger to thermal
shock.
resist corrosion, and
are easily removed for
inspection or service.
Cast iron headers with
porcelainized
waterways are
available.
single bank, straight
through design
delivers lowest
pressure drop. Integral
fins have ten times the
heat transfer surface
of plain tubes.
automatically size
boiler to loads as low
as 20% of full input
for maximum fuel
economy. Standard on
Type NH boilers.
Optional on Type H
and WH.
easily removed for
inspection and service.
Tube Sheet and
“ O” Ring
Construction
Interlocking
Refractory
Panels
Stainless Steel
Burners
Slide-out Burner
Tray
Spark-to-Pilot
Ignition
maintain precise
combustion at all
firing rates, burn
quietly and won’t clog
or corrode.
allows easy inspection
and service.
the most dependable
ignition method
available.
eliminates the repair
and maintenance
problems associated
with rolling tubes
directly into a casting.
with sealed corners
reduce radiation
losses.
Indoor/outdoor
construction
RaythermTM Atmospheric
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MODEL INFORMATION
Models 514-824
Models 133, 181-401
Indoor model shown
Outdoor model shown
Indoor model shown
MBTUH†
Dimensions (in.)
Overall Height
Indoor Outdoor
45 38-1/2 24-1/8 1-1/4
Model
No.
MBTUH†
Dimensions (in.)
Water Flue
Conn. Dia.
Input Output Width
Depth
Model
No.
Overall Height
Water Flue
Conn. Dia.
Input Output Width
Depth
133
136
112 14-1/4
6
6
7
8
9
Indoor Outdoor
514
624
724
824
512
627
726
825
419 32-3/4
514 37-1/2
595 41-5/8
677 45-3/4
57
57
57
57
44-1/8 29-1/2
44-1/8 29-1/2
44-1/8 29-1/2
44-1/8 29-1/2
2
2
2
2
10
12
12
14
181/182 181
260/261 264
330/331 334
148 18-1/4 62-5/8
216 22-3/8 62-7/8
274 25-3/4 63-3/4
40
40
40
40
26-1/2 1-1/2
26-1/2 1-1/2
26-1/2 1-1/2
26-1/2 1-1/2
400/401 399‡ 327‡ 29-1/4 65-3/8
† Natural gas and propane
† For natural gas units; For propane units, use .94 multiplier
‡ For 2-stage Model 401 (low NOx) units, derate 5%
Models 926-1826
Models 2100-4001
Outdoor model shown
MBTUH†
Dimensions (in.)
Model
No.
Overall
Height
Water Flue
Conn.‡ Dia.
Input
Output
Width
Depth
Outdoor
926
926
759
888
966
1055
1159
1287
1442
52-3/8 46-3/4 32-1/2
59-1/4 46-3/4 32-1/2
63-5/8 46-3/4 32-1/2
68-5/8 46-3/4 32-1/2
74-7/8 46-3/4 32-1/2
81-1/8 46-3/4 32-1/2
89-3/8 46-3/4 32-1/2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Indoor model only
1083
1178
1287
1414
1571
1758
Indoor
962
1125
1223
1336
1468
1631
1826
1083
1178
1287
1413
1570
1758
MBTUH†
Dimensions (in.)
Model
No.
Overall
Height
Water Flue
Conn.‡ Dia.
Input
Output
Width
Depth
962
789
922
52-3/8 76-1/8 32-1/2
59-1/4 78-1/8 32-1/2
63-5/8 78-1/8 32-1/2
68-5/8 80-1/8 32-1/2
74-7/8 80-1/8 32-1/2
81-1/8 80-1/8 32-1/2
89-3/8 80-1/8 32-1/2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
14
16
16
18
18
18
20
2100
2500
3001
3500
4001
2100
2499
3000
3500
4000
1722
2049
2460
2870
3280
61
68-1/4 54-3/4
68-1/4 54-3/4
68-1/4 54-3/4
68-1/4 54-3/4
68-1/4 54-3/4
3
3
3
3
3
24
26
28
30
32
1125
1226
1337
1467
1630
1826
70
1002
1096
1203
1337
1497
81-1/8
92-1/2
103-3/4
† Natural gas and propane
‡ 4” on single-pass boilers (Type H)
† For natural gas units; For propane units, use .92 multiplier for indoor, .955 multiplier for outdoor
‡ 3”NPT on single-pass boilers (Type H)
Catalog No.: 1000.18A Effective: 05-01-06 Replaces: 01-01-06
Raypak Inc., 2151 Eastman Ave., Oxnard, CA 93030
(805) 278-5300 Fax (800) 872-9725
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