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Guidelines for the design, purchase and installation of Slant/Fin Caravan gas-fired, hot water modular boiler systems.
CONTENTS
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Ratings and dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . .3,4
Recommended Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Optional factory supply and return headers . . . . . . . . . . . . . .6
Boiler room design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Boiler room air supply requirements . . . . . . . . . . . . . . . . . . . .7
Typical layouts for gas-fired systems . . . . . . . . . . . . . . . . . . .8
Venting a gas-fired system . . . . . . . . . . . . . . . . . . . . . . . . .9,10
Gas piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-12
CODES AND STANDARDS
All Caravan installations must comply to local codes or, in the
absence of local codes, to the National Fuel Gas Code, ANSI,
Z223.1-latest edition.
In addition where required by the authority having jurisdiction, the
installation must conform to American Society of Mechanical
Engineers Safety Codes for controls and safety devices for
automatically fired boilers, No. CSD-1. The installation must also
conform to the additional requirements of Slant/Fin Instruction Book
publication no. GG-100-40 latest edition.
All electrical wiring is to be done in accordance with the National
Electrical Code ANSI/NFPA No. 70-latest edition and all local electri-
cal codes. The unit must be electrically grounded if an external
power source is used.
In Canada, the installation must be in accordance with standards
CGA B149.1 and B149.2, installation codes for gas burning
appliances and equipment and/or local codes. All electrical
connections are to be made in accordance with Standard C.S.A.
C22.1 Canadian Electrical Code Part 1 and/or local codes.
Many state and local codes require intermittent ignition devices for
gas boilers. Please specify if necessary.
LOCAL CODE APPROVALS
New York City:
GGT and GGHT Caravan Modules - MEA 283-93-E Vol. II
Slant/Fin vent damper NYS approval No. 8859
Pennsylvania:
Caravan boilers are approved in Pennsylvania by PA Cert. 174-BT-S
®
HOT WATER/GAS
APPLICATION GUIDE
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13,14
Field wiring at modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
SC-3 system wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
SC-3 ladder wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
SC-9 space heating wiring . . . . . . . . . . . . . . . . . . . . . . . . . .18
SC-9 space heating ladder wiring . . . . . . . . . . . . . . . . . . . . .19
SC-9 space and domestic hot water wiring . . . . . . . . . . . . .20
SC-9 space and domestic hot water ladder wiring . . . . . . . .21
Caravan warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Request for Caravan rating plate . . . . . . . . . . . . . . . . . . .23,24
INTRODUCTION OF FRESH WATER
Introduction of excessive amounts of fresh water into a system can
cause scaling and leave deposits in the boiler and the surrounding
pipes. This will lead to inefficient boiler operation and breakdown.
Fresh water will enter the system as a result of hidden leaks such
as may occur in underground piping. Relief valves should be piped
to a location that shows visible signs of relief.
Process applications that use fresh water, require the use of heat
exchangers. Any process application that results in introduction of
fresh water into a boiler can cause scaling with deposits forming in
the boiler and surrounding piping. This will damage the boiler.
Introduction of fresh water from leaks will cause similar damage.
In some areas it may be necessary to use a feed water treatment to
control the corrosive makeup of the feed water. Check with the local
authority, to determine if the feed water will need a conditioning
treatment before being supplied to the boiler.
Modular Boilers
Publication No. CG-10-HWG
Printed in the U.S.A. 1104
www.slantfin.com
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Related Manuals for Slant/Fin GAS Modular Boilers
Summary of Contents for Slant/Fin GAS Modular Boilers
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Page 1: Table Of Contents
Typical layouts for gas-fired systems ....8 Caravan warranty ....... . .22 Venting a gas-fired system . -
Page 3: Introduction
Table 1: Gas Caravan ratings and dimension/hot water model—GGT Series (100 psi maximum working pressure) I = B = R Ratings Consists of... - Page 4 Figure 1: Gas Caravan dimensions and typical piping/hot water models Design Data Max. ASME Working Pressure: 100 psi Power Requirements: 120 volts, 60 HZ, .34 amps per module...
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Page 5: Recommended Piping
RECOMMENDED PIPING Figure 2. Recommended boiler piping for variable circulation Figure 3. Supply and return piping locations Figure 4. Instantaneous tankless coil— Figure 5. Storage tank from tankless coil with recirculation two temperature with recirculation... -
Page 6: Optional Factory Supply And Return Headers
Some governing agencies do not allow compression type couplings. Consult your local code requirements. Figure 6. Gas Caravan—optional header assembly for all models GGT hot water Caravan systems... -
Page 7: Boiler Room Design
BOILER ROOM DESIGN BOILER ROOM AIR SUPPLY Caravan modular boiler systems allow better utilization of floor To ensure safe, efficient operation, the modular boiler system must space and permit future expansion with minimum cost. Caravan be supplied with sufficient air to support complete combustion,... -
Page 8: Typical Layouts For Gas-Fired Systems
Figure 8. Typical layouts for gas-fired systems... -
Page 9: Venting A Gas-Fired System
Caravan: a draft hood for each module, a breeching manifold and a effective in preventing spillage. When the boiler room is in unheated chimney. - Page 10 Connector Rise: Connector rise is the length of the pipe connecting the top of the draft hood to the system breeching above. The diameter of this pipe varies depending upon BTU input, chimney height and the length of the connector. Fig.9 (Dim. “B”) shows the location of this pipe in a typical appli- cation.
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Page 11: Gas Piping
Using data in Table 4, calculate equivalent linear length of screw pipe fittings used in GGT-600E fabrications of main. Add this to figure from step (a) to obtain equivalent total length. GGHT-700E c. Find Caravan gas consumption in cubic feet per hour from Table 3 in hot water GGHT-750E systems. GGHT-800E d. - Page 12 Table 5. Characteristics of various fuel gases Flow Type Heating Correction of Gas Valve*† Factor Natural 1000 Btu 1.00 Propane 2500 Btu 1.10 * per cubic foot † Consult fuel supplier for actual BTU value. Table 6. Gas main sizing guide Nominal Equivalent Iron Pipe...
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Page 13: Controls
CONTROL SYSTEM SELECTION 1. Outdoor reset: The supply water temperature is Slant/Fin offers two controls to step fire a hot water Caravan sys- automatically increased as outdoor temperature tem. The SC-3 and SC-9 controls fulfill a wide range of applica- decreases and decreased as outdoor temperature tions. - Page 14 • Immersion well for supply water sensor: to be installed in control header supplied with Caravan • High Limit (manual reset) and Immersion Well: to be installed in control header supplied with Caravan • Low Water Cut-Off (manual reset): to be installed in modular boiler headers above modules cast iron heat exchanger •...
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Page 15: Field Wiring At Modules
FIELD WIRING AT MODULES... -
Page 16: System Wiring
SC-3 SYSTEM WIRING DIAGRAM... -
Page 17: Ladder Wiring
SC-3 LADDER WIRING DIAGRAM... -
Page 18: Space Heating Wiring
SC-9 SPACE HEATING WIRING DIAGRAM... -
Page 19: Space Heating Ladder Wiring
SC-9 SPACE HEATING LADDER WIRING DIAGRAM... -
Page 20: Space And Domestic Hot Water Wiring
SC-9 SPACE AND DOMESTIC HOT WATER WIRING DIAGRAM... -
Page 21: Space And Domestic Hot Water Ladder Wiring
SC-9 SPACE AND DOMESTIC HOT WATER LADDER WIRING DIAGRAM... -
Page 22: Caravan Warranty
Slant/Fin Limited Five-Year Warranty for Caravan Modular and Individual Commercial Application Cast-iron Hot Water Boilers in Space Heating Applications. WARRANTY INCLUDES: AFTER FIRST YEAR, WARRANTY EXCLUDES: FIRST YEAR: Repair or replacement in accordance with All boiler components other than a cast-iron heat exchanger,... - Page 23 CARAVAN SYSTEM RATING PLATE System rating plate format for Caravan modular boiler system. System rating plates are available upon request using the form on the back cover.
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Page 24: Request For Caravan Rating Plate
REQUEST FOR CARAVAN SYSTEM RATING PLATE Each individual Caravan module is shipped with a rating plate bearing the model, serial number, capacities and FAX THIS REQUEST TO: 516-484-6958 Slant/Fin Tech certifications for that module. A modular boiler system is a Service single boiler.