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3X1 ES'VWIA.lSr33 Ej
HE.A.T
G--A..S3
bulletin 1249-D
28501
Secondary air on each side of burner port
12 sizes 405,006 to 2,250,000 Btuh Input
for natural, mixed, manufactured or propane gases
natural or induced draft
7:\'CVT A OcS.Gr-1 Mlv!T ' I,, , G G r A e1 C The dependable performance, durability and efficiency of the Square-Heat boiler design has been proved by thousands of installations. Now an improved Kewanee gas package incorporating all the well known features of compact firebox boiler design . . . available for natural or induced draft operation.
rHllT-'MSS CO:'!S < i-fOGT-Cr! The large firebox with arched upright crown sheet provides the first pass and assures ample volume for complete and quiet combustion and an unusually large proportion of direct or primary heating surface. The second pass is from rear to front in the direct fire tubes. The third pass is from front to rear in the return fire tubes. This longer gas travel--with no refractory baffles to burn out or short circuit gases--gives the Square-Heat Gas Boiler exceptionally high operating efficiency.
All tubes in Square-Heat Gas Boilers are 3" O.D., secured to the tube sheets by roller expander --no tubes are welded to the tube sheets. Spinner blades in return tubes swirl the hot gases against the tube surfaces for longer gas travel and maximum heat transfer.
The Kewanee three-pass design requires only minimum boiler room dimen sions for installation and accessability Low height teamed with a rear smoke outlet makes it a perfect application for compact boiler rooms.
An unbroken disengaging area and ample water content assures steady water line and an adequate reserve of dry steam at all times.
Heavy gauge steel jacket with attractive smooth enamel finish and glass or
Copyright 1961 by American Radiator & Standard Sanitary Corporatioi
mineral fiber insulation . . . reduces heat loss and is quickly and easily in stalled.
V.'aTTT H-EATififC CCHG Standard Kewanee "Kl" 'instantaneous) and "KT" ('tank; coils can be provided for all units. Coil opening at front of boiler eliminates any inter ference with controls, wiring, or breeching.
CASV M $ S C ;,'l B 1 ' AV'C .r'S r A A i 'O'1 The Square-Heat Type R Gas Boiler is shipped ready for field assembly and installation. Simply set the boiler shell on the gas burner 'which serves as the boiler base), slip on the insulated jacket--and the boiler unit is ready for trim, controls and piping. No sections to handle ... no tie rods, push nipples, or refractory to install. Assembly and installation costs are reduced to an absolute minimum.
Available for all types of commercial gases--natural, manufactured, or pro pane. AG units are designed for installation with natural draft stacks. IG units are designed with an induced draft fan for installation with stub vents. Flexibility of installation with various stack ot draft conditions makes the Square-Heat Gas Boiler ideal for both new construction and modernization ot existing buildings. ASME Boiler Construction Code requirements have been followed to the last detail. But more than that, the Square-Heat Gas Boiler gives performance well above and beyond any boiler code requirements.
Flange quality plate . . . heads and walls are firebox steel . . . gas-tight con struction throughout easy access to flues for cleaning . . . heavy cast iron front fire door for access to gas burner... integral in design and construction
. thoroughly tested.
28502
ratings and data
-----------f...........
BOILER NUMBER (--AG or -IG Suffix)
3R1
co
00 bo
Rating-- MBh
...
.........................................
-- horsepower. . --
...
--steam per hour 212 F.......................
--steam (gross).
--steam (MCA net) .
.
........ , 324 ... 1 9.7
lbs 1 334 sq ft i 1350 sq ft 11010
Input--gas
MBh | 405
Heating surface ...
......................
sq ft ! 53
Furnace volume ....
Safety valve capacity--lbs. steam per hour
. . j 324
Vent diameter (AG) natural draft
..
Stack size (AG) natural draft
diameter..................................................................
height
............................
in ; [
.in ft
12
10 30
Vent diameter (IG) induced draft ...
Supply size
...
; 10 in ; 4
Return size..........................
... in j 3
Gas controls size (natural gas).
in ! 1
Gas pressure required (natural gas)
in wc i 6
Gas control size (propane gas)
. in
1
Approx, dry weight (AG) ..
... lbs , 1700
Approx, dry weight (IG)
.lbs ! 1800
Y150 lb American.Standard Flange.
3R2
396 11.8 408 1650 1240 495
65 10.4 396
12
10 35
10 4 3 1 6 1 1875 1975
3R3
468 14.0 482 1950 1460 585
77 12.0 468
12
12 35 10
4 3
1% 6 1 2050 2150
3R4
540 16.1 556 2250 1690 675
88 13.5 540
12 35 10
4 3 l`/4 6 1 2225 2325
3R5 I 3R6
648 19.3 668 2700 2020
792 23.6 [ 816 3300 2480
810 : 990
106 129
17.2 20.1
648 | 792
15 1 15
1
14 : 14 30 35
10 10
4! 4
4! 4
1% 1%
61 6
1 1%
2600 1 2925 2700 1 3025
3R7 3R8 3R9
936 27.9 965 3900 2930
1170
153
23.0
936
15
1080 32.2 1113 4500 3380
1260 37.6 1298 5250 3940
1350 1575
206
26.3 32.6
1080 1260
15 18 ------------- 1
14 16 16 40 40 40
10 14 14 4 4 6*
444
1% 1% 1% 66 6
1% 3200 3300
1% 3550 3850
i%| 3975 4275
3 R10
1440 43.0 1484 6000 4500 1800 236 37.0 1440
18
16 40 14
6* 4
2 6
1% 4475 4775
3R11
1620 48.4 1670 6750 5060 2025 265 41.1 1620
18
18 45 14
6* 4 2 6
1% 4625 4925
3R12
1800 53.7 1855 7500 5620
2250
294
45.3
1800
18 Us'-i'i
18 50
14
6* 4 ..
2
6
2
5000
5300
dimensions-inches
BOILER NUMBER (--AG or -IG Suffix)
A --Boiler width --shell -- Boiier width--jacketed
B --Boiler length (AG). BB --Boiler length (IG) . C --Boiler height . D --Water line height E --Supply height F --Coil connection height G --Return height
..
H --Rear vent height (AG) HH--Rear vent height (IG)
J --Breeching connection diameter (AG) JJ --Breeching connection diameter (IG)
K --Supply location , ,
L --Front smokebox depth
M --Rear smokebox depth (AG) MM--Draft inducer depth (IG)
P --Top vent height (AG) PP --Top vent height (IG)
R --Base width
S --Base length
T --Clearance for tube replacement
3R1
30 31
461/4 61 641/4 54 65 56 16
44% 44% 12 10
10
8 8 23
51% 51
311/2 32% 32
3R2
30 31 521/4 67 64>/4 54 65 56
16
44% 44% 12 10
12 8 8 23
51 -/4 51
31% 38% 38
3R3
30
31 58i% 73 64% 54 65 56 16
44% 44% 12 10
14
8 8 23
51% 51
31% 44 y2 44
3R4
30
31 64% 79 64% 54 65 56
16
44% 44%
12 10
16 8 8 23
51% 51
31% 50`A 50
3R5
34
35
59% 74
71% 61 72 63 16%
49% 49% 15 10 14
9 8 23 53 >4 56
35%
44 V?. 44
3R6
34
35 67 82
71% 61 72 63 16%
49% 49% 15 10
17 9 8 23
58 Vi 56 35%
52% 52
3R7
34
35
75 90
71% 61 72 63
16% 49% 49% 15 10
19 9 8 23
58 Vi 56
35% 60% 60
1 3R8
! 34
35
83% ; 106
71% 61 72
63
; 16% ! 49%
49%
15 14
22
9 8 30
58% 60 V? 35%
69
69
| 3R9
| 41
42 , 75 1 97
80%
69 ; 84%
71
16% 1 56% : 56%
18 14
16
10 9 31
66`A 67
: 42%
58%
58
3R10
41
42 83 105 80% 69 84% 71
16% 56% 56% 18 14
18 10 9 31
66% 67
42%
66% 66
3R11
41
42 90% 112 80% 69 84% 71
16%
56% 56% 18 14
20 10
9 31
66;/? 67
42% 73% 73
28503
3R12
41
42 98 120 80%
69 84% 71
16%
56/2 56% 18 14
24 10 9 31
66 y2 67
42%
81% 81
....
crt,lj. L.l il ICS
1 Three-Pass ASME Code Boiler 2 Gas Tight Insulated Front Smokebox 3 Gas Tight Rear Smokebox 4 Cast Iron Front Firedoor 5 3" Firetubes with Spinner Blades in Return Tubes 6 Wrap-around Insulated Steel Jacket 7 Flue Cleaner with Handle 8 Washout Plug Socket Wrench 9 Operating Limit Control 10 Safety High Limit Control 11 Gas Burner Assembly including: 12 Boiler
Base; Gas Manifold; Orifices; Slotted Port Premix Type Cast Iron Burner Heads; Ad justable Secondary Air Inlet Louver; and Primary Air Inlet Dampers 12 Thermocouple Flame Safeguard with Constant Pilot including: Thermocouple; Pilot Safety Relay; Pilot Valve for 100% Safety Shutoff; and Pilot Burner with Shield and Mounting Bracket 13 Gas Control Group including: Automatic Dia phragm Gas Valve; Main Gas Pressure Regulator (Omit for propane gas); Manual Gas Cock; Pilot Cock with Tubing; and Pilot Gas Pressure Regulator 14 Standard Voltage--115 V, 60 cy., 1 ph. 15 Barometric Draft Regulator 16 Necessary Insulation and Compound for AirTight Seal between Boiler and Burner-Base Assembly 17 Boiler Shell; Insulated Jacket; Trim and Controls; and Burner-Base Assembly Shipped Ready for Field Installation
s'l.sa nn umt.B
1 No. 767 Low Water Cut-Off 2 Safety Valve 3 Compound Steam and Vacuum Gauge 4 Water Gauge and Glass
1 Flue Gas Temperature Gauge 2 Pyrex Observation Port 3 Instantaneous or Tank-Type Hot Water Coils 4 Room Thermostat Control 5 Electronic Flame Safeguard with Constant Pilot 6 Electronic Flame Safeguard with Gas-Electric
Ignition Assembly for Intermittent Pilot 7 Electronic Flame Safeguard with Gas-Electric
Ignition Assembly for Constant Pilot in cluding: Control Cabinet with Indicating Lights, Switches, Component Check Relay and Mounting Bracket 8 Automatic Motorized Gas Valve with Damper Arm and Linkage for Operation of Secondary Air Inlet Louver 9 Safety Solenoid Gas Valve in addition to Standard Automatic Valve 10 Gas Controls to Meet FM Requirements 11 Gas Controls to Meet Local or Utility Requirements 12 Gas Controls for Other Than Standard Inlet Pressure 13 Starting Service 14 One Year Service
1 Combination Low Water Cut-Off and Pump Control 2 Combination Low Water Cut-Off and Water Feeder 3 Second Low Water Cut-Off 4 Surface Blow-Off Opening
1 No. 64A Quick Hook-up Low Water Cut-Off 2 Relief Valve 3 Combination Altitude Gauge and Thermometer
i !..~~
1 Horizontal Discharge (Rear) Vent for Natural Draft Stack Application
1 Combination Low Water Cut-Off and Water Feeder
1 Vertical Discharge (Top) Vent for Natural Draft Stack Application
1 Induced Draft Fan including: 115 V, 60 cy., 1 ph. Constant Speed Motor with Adjustable Pitch Sheave; Boiler Mounting Brackets; and Vertical Discharge (Top) Vent for Stub Stack Application
2 Draft Safety Switch
1 Horizontal Discharge (Rear) Vent for Stub Stack Application
2 Pre-Purge Relay
3 Pre-Purge and Post-Purge Relay
28504
!
Combustion noise is "whispering quiet" . . . The intense blue flame produced by the precision built cast iron burner heads is both efficient and quiet... Makes this boiler unit ideal for office and store buildings, schools, hospitals, apartments, and other medium size buildings where exceptionally quiet boiler operation is desired.
KEWANEE GkA.S BURInTER FEATURES
The Kewanee atmospheric premix gas burner is actually the boiler base . . . compact, easy to handle and install. Accurately machined deep slotted ports in the cast iron burner heads provide high capacity, prevent flash back, and insure smooth light-off from a single pilot. The individually spaced cast fins on the burner heads permit a continuous flow of secondary air between and over each fin .. . cooling and adding years of life to the burner heads. Secondary air surrounds both sides of the flame thoroughly mixing gas and air for rapid, quiet combustion... producing a short flame height without excess air... maximum burner efficiency from a quiet hot blue flame.
Primary air supply and secondary air supply are separately controlled ... permits flame adjustment for all types of gases under varying draft and operating conditions.
Various control and safety combinations are available, all with 100% safety shut off ...thermocouple pilot and safety relay with automatic diaphragm gas valve is standard. Electronic safety relay . . . electronic safety relay with automatic electric ignition... motorized gas valve with linkage to operate secondary air inlet louvers... automatic safety gas valve in addition to standard operating gas valve. All these, plus other control options are available to meet specific job and local code requirements.
burner data
Unit --AG
or --IG
3R1
3R2
input
MBh 405 495
Number of Burner Heads
Dimensions--Inches Burner (Boiler Base)
Natural Gas
4
4
Propane Gas
Width
____________ |
4 31 %
4 31 %
Length
32% 38%
Height
12% 12%
Gas Controls
Natural Gas*
Size
Required Inlet
Pressure
1" 6" w.c.
1" 6" w.c.
_ Propane i
Gas** I
Size
1"
i"
IG Units
Induced Draft
Fan Data*** Size HP
10 DI-%
10 DI-%
3R3
585
4
6 31`/2 44% 12% 1%" 6" w.c. 1" 10 DI-%
3R4 675 3R5 810
6 6
6 31% 50% 12% 1 lA" 6" w.c. 1" 10 Oi-% ____________ |
8 351/2 44% 12% 1%" 6" w.c. r 10 DI-i/6
3R6 990
8
8 35% 52% 12% 1%" 6" w.c. W 10 Dl-i/e
3R7 1170
8
10
351/2
60%
12%
1%"
6" w.c.
_i%"
10 Dl-i/e
3R8
1350
10
12
351/2
69
12% 1%" 6" w.c. 1%" 14 DL--% C
3R9
1575
12
15
42%
58%
12%
1%" 6" w.c.
1%" 14 DL-- % C
3R10
1800
15
15
425/8
66%
12%
2"
6" w.c.
l`/2"
14 DL--% C
3R11
2025
15
18
42%
73%
12%
2"
6" w.c.
i%" 14 D- % C
3R12
2250
18
*1000 Btu/cf. 0.60 s.g. **11' w.c. standard inlet pressure.
18
42%
81%
12%
2"
6" w.c.
2"
14 D-% C
***115v, 60 cy., 1 ph constant speed motor with adjustable pitch sheave.
28505
The contractor shall furnish and install........... Model No............ Square-Heat Gas Boiler(s)for(natural)(manufactured)(propane) gas. The unit shall be of three-pass firebox design with arched upright crown sheet and two passes of fire tubes, and con structed in accordance with the ASME Code for (15 pounds steam) (30 pounds water).
The boiler(s) shall contain not less than ........... cubic feet of furnace volume and shall have a gross output rating not less than ........... MBh. Heat release shall not exceed 52,000 Btu per cubic foot of furnace volume.
An insulated cast iron fire door shall be provided for access to the gas burner heads. A front flue access cover with refractory securely keyed in place and of a size permitting easy access to all fire tubes shall be mounted on a gas tight, insulated front smokebox. Gas tight rear smokebox shall be provided with a (rear) (top) outlet.
Boiler(s) shall be provided with a wrap-around steel jacket with 1" mineral fiber insulation and smooth enamel finish.
All tubes shall be set with a roller expander at each end. No welding of tubes to the tube sheets nor use of refractory baffling to provide the second or third pass will be permitted. Spinner blades shall be provided in the return fire tubes.
NOTE: Strike out clauses in parenthesis which are not applicable.
Boiler(s)shall be equipped for operation (with a natural (AGSeries) draft stack ........... inches in diameter and ............ feet in height) (with an induced f/G Series) draft fan with safety draft switch with a ........... inch diameter vent)
Electrical characteristics shall be 115 volt, 60 cycle, single phase.
Gas burner equipment shall be an integral part of the boiler base, and shall include: atmospheric up-shot type cast iron heads with accurately machined deep slotted ports: separate air inlet dampers for control of primary and secondary air; gas manifold; necessary safety burner pilots; automatic gas valve; gas pressure regulators (omit for propane gas) and manual gas valves for both pilot and main burner.
Automatic gas valve shall be of the (diaphragm type) (motorized type with linkage for control of secondary air inlet louvers) (with an additional automatic safety solenoid valve).
Combustion safety control, including 100% safety shut off, shall be by (electronic relay with gas-electric ignition assembly for constant pilot, complete with control cabinet with indicating lights, switches, component check relay and mounting bracket) (electronic relay with gas-electric ignition assembly for inter mittent pilot) (electronic relay with constant pilot) (thermo couple with constant pilot).
Boiler mounted controls shall consist of safety limit switch, operating limit switch, low watercut-off, gauges, trim and safety or relief valves for (15 pounds steam) (30 pounds water) operation.
Boiler, burner, controls and insulated jacket shall be packaged and shipped as separate components by the boiler manufacturer ready for field assembly. Unit shall be field assembled, piped, and wired by the contractor.
NOTE: Specify starting service and period of free service if it is to be supplied by an authorized service representative of the boiler manufacturer.
Owner's representative shall be present to receive instructions in the care and maintenance of the boiler unit at the time the boiler is started.
American-Standard Industrial Division offers all the major components for air handling, heating, and air conditioning? You can look to one company for your total requirements for systems of any size or degree of complexity ... whether you need fan coil, induction or thru-the-wall terminal units, package units, multi-zone air conditioners, fans, centrifugal refrigerating machines, water chillers, boilers or roof ventilators. You'd be sur prised at the convenience. You talk to product specialists who speak your language. You have one source responsible for quality and perform ance in equipment designed and manufactured to work together.
Bulletin No 1249-0 1QM 3-62 M
iBMinin
28506
SALES OFFICES IN ALL PRINCIPAL CITIES
Executive offices: Detroit 32, Michigan
n Canada
American-Standard Products (Canada) Ltd. Toronto 4-, Ontario,
Canadian Sirocco Products
AMERICAN RADIATOR & STANDARD SANITARY CORPORATION
Lilho in U S.A