Hot Water Gas Modular Boilers Application Guide-Books Pdf

HOT WATER GAS Modular Boilers APPLICATION GUIDE
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INTRODUCTION, This Caravan application manual is intended to simplify the selection B Faster easier installation modules are completely factory. and application of Slant Fin modular systems for a variety of space assembled including individual jackets to save on site labor. heating and domestic hot water requirements It applies to Optional easy to install return and supply headers with flexible. gas fired hot water applications only Where intermittent pilot vent quick connect fittings are available for hot water systems. damper or any additional information is required contact your local. wholesaler Slant Fin sales representative or the Slant Fin factory C Safety each module contains an individual high limit control. and a dual combination gas valve ASME relief valve is provided. Due to design flexibility of a Caravan modular boiler system BTU separately for mounting directly on each module. input capacities are unlimited, D Fast domestic hot water recovery Caravan offers an external. A Boiler room design size and flexibility since Caravan heat exchanger of the positive circulating type. modules have the burner and controls mounted to the front they. can be installed with minimum clearances as per codes thus. saving a significant amount of floor space, Table 1 Gas Caravan ratings and dimension hot water model GGT Series 100 psi maximum working pressure. Consists of Ratings,Draft Draft Header Space Length Min. No of Module EDR AHRI Boiler Thermal Water Jkt Hood Flue Hood to Btwn with Header. Htg Model CSA Gross Water Net Horse EFF Content Ship Width Ht Collar Ht Header Mods Header Size. Model No Mod Number Input Output Sq Ft Output power gal Wt A B C D E F L. GGT 600E 2 GG 300ES 600 486 2814 422 14 5 81 10 18 4 1080 2611 16 595 8 8 121 32 2113 16 55 16 4 11 2. GGHT 700E 2 GG 350HES 700 570 3306 496 17 0 81 40 20 6 1230 301 16 671 8 9 1323 32 253 16 115 16 5 2 2. GGHT 750E 2 GG 375HES 750 606 3506 526 18 1 80 90 20 6 1230 301 16 595 8 10 1323 32 253 16 115 16 5 2 2. GGHT 800E 2 GG 399HES 798 644 3734 560 19 2 80 60 20 6 1230 301 16 665 8 10 1323 32 253 16 115 16 5 2 2. GGT 900E 3 GG 300ES 900 729 4221 633 21 8 81 10 27 6 1590 2611 16 595 8 8 121 32 2113 16 55 16 7 7 2. GGHT 1050E 3 GG 350HES 1050 855 4959 744 25 5 81 40 30 9 1830 301 16 671 8 9 1323 32 253 16 115 16 7 10 2. GGHT 1125E 3 GG 375HES 1125 909 5259 789 27 2 80 90 30 9 1830 301 16 595 8 10 1323 32 253 16 115 16 7 10 2. GGHT 1200E 3 GG 399HES 1197 966 5601 840 28 9 80 60 30 9 1830 301 16 665 8 10 1323 32 253 16 115 16 7 10 3. GGT 1200E 4 GG 300ES 1200 972 5628 844 29 0 81 10 36 8 2140 2611 16 595 8 8 121 32 2113 16 55 16 10 3 3. GGHT 1400E 4 GG 350HES 1400 1140 6612 992 34 1 81 40 41 2 2440 301 16 671 8 9 1323 32 253 16 115 16 10 6 3. GGHT 1500E 4 GG 375HES 1500 1212 7012 1052 36 2 80 90 41 2 2440 301 16 595 8 10 1323 32 253 16 115 16 10 6 3. GGT 1500E 5 GG 300ES 1500 1215 7035 1055 36 3 81 10 46 0 2675 2611 16 595 8 8 121 32 2113 16 55 16 12 11 3. GGHT 1600E 4 GG 399HES 1596 1288 7468 1120 38 5 80 60 41 2 2440 301 16 665 8 10 1323 32 253 16 115 16 10 6 3. GGHT 1750E 5 GG 350HES 1750 1425 8265 1240 42 6 81 40 51 5 3050 301 16 671 8 9 1323 32 253 16 115 16 13 2 3. GGHT 1875E 5 GG 375HES 1875 1515 8765 1315 45 3 80 90 51 5 3050 301 16 595 8 10 1323 32 253 16 115 16 13 2 3. GGHT 2000E 5 GG 399HES 1995 1610 9333 1400 48 1 80 60 51 5 3050 301 16 665 8 10 1323 32 253 16 115 16 13 2 3. GGHT 2100E 6 GG 350HES 2100 1710 9918 1488 51 1 81 40 61 8 3660 301 16 671 8 9 1323 32 253 16 115 16 15 10 3. GGHT 2250E 6 GG 375HES 2250 1818 10518 1578 54 3 80 90 61 8 3660 301 16 595 8 10 1323 32 253 16 115 16 15 10 3. GGHT 2400E 6 GG 399HES 2394 1932 11202 1680 57 7 80 60 61 8 3660 301 16 665 8 10 1323 32 253 16 115 16 15 10 3. GGHT 2450E 7 GG 350HES 2450 1995 11571 1736 59 6 81 40 72 1 4270 301 16 671 8 9 1323 32 253 16 115 16 18 6 3. GGHT 2625E 7 GG 375HES 2625 2121 12271 1841 63 4 80 90 72 1 4270 301 16 595 8 10 1323 32 253 16 115 16 18 6 3. GGHT 2800E 7 GG 399HES 2793 2254 13069 1960 67 3 80 60 72 1 4270 301 16 665 8 10 1323 32 253 16 115 16 18 6 3. GGHT 2800AE 8 GG 350HES 2800 2280 13224 1984 68 1 81 40 82 4 4880 301 16 671 8 9 1323 32 253 16 115 16 21 2 3. GGHT 3000E 8 GG 375HES 3000 2424 14024 2104 72 4 80 90 82 4 4880 301 16 595 8 10 1323 32 253 16 115 16 21 2 3. GGHT 3150E 9 GG 350HES 3150 2565 14877 2232 76 6 81 40 82 4 5490 301 16 671 8 9 1323 32 253 16 115 16 23 10 3. GGHT 3200E 8 GG 399HES 3192 2576 14936 2240 77 0 80 60 82 4 4880 301 16 665 8 10 1323 32 253 16 115 16 21 2 3. GGHT 3375E 9 GG 375HES 3375 2727 15777 2367 81 5 80 90 92 7 5490 301 16 595 8 10 1323 32 253 16 115 16 23 10 3. GGHT 3500E 10 GG 350HES 3500 2850 16530 2480 85 1 81 40 92 7 6100 301 16 671 8 9 1323 32 253 16 115 16 26 6 3. GGHT 3600E 9 GG 399HES 3591 2898 16800 2520 86 6 80 60 92 7 5490 301 16 665 8 10 1323 32 253 16 115 16 23 10 3. GGHT 3750E 10 GG 375HES 3750 3030 17530 2630 90 5 80 90 103 0 6100 301 16 595 8 10 1323 32 253 16 115 16 26 6 3. GGHT 4000E 10 GG 399HES 3990 3220 18670 2800 96 2 80 60 103 0 6100 301 16 665 8 10 1323 32 253 16 115 16 26 6 3. FOR LARGER SIZES USE MULTIPLES OF THE ABOVE, Specify gas by name Natural or Propane Net ratings in square feet based on emission rate of 150 Btuh sq ft.
Net ratings are based on piping and pick up allowance of 1 15 Slant Fin should Refer to figures 1 and 8 Headers shown are optional. be consulted before selecting a boiler for installation having unusual piping and or All factory supplied headers use 3 system connections. pick up requirements Ratings must be reduced by 4 at 2 000 ft elevation and Modules in excess of 10 should be piped in parallel in two or more batteries. an additional 4 for every additional 1 000 ft elevation over 2 000 ft. Note For higher capacities specify correct combination of standard Caravan. modules shown, 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. 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, EQUIPMENT INCLUDED Module pressure and temperature gauge unmounted.
Module pressure relief valve ASME unmounted Specify. GGT SERIES Hot Water Models 30 50 or 100 psi, One per module unless otherwise noted Control header unmounted one per system. Pre assembled heat exchangers with built in air separators Draft hoods unmounted. and insulated jacket,Base OPTIONAL EQUIPMENT, Flue collector Hot water supply and return header assemblies. Gas burners gas orifices and manifold assembly Control panel with automatic lead lag. Combination gas valve including manual shut off pressure Spark ignition system. regulator Vent dampers,Hi limit control External DHW heat exchanger. System pressure and temperature gauge unmounted one. per system, Building piping must be rigidly secured so it cannot. move where connected to headers,Shown reverse return Preferred For direct return.
header assembly piping connections may be made at,the same end of the boiler bank not as shown. 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. 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. modules are hand truckable fit through doorways and often may replacing air entering draft dampers or draft hoods and ventilating. be installed around an existing inoperative boiler They can be the boiler room or areas. grouped in heating module batteries of single multiple or angular For additional information not listed below see ANSI Z223 1. rows Gas fired boiler systems consisting of 11 or more modules section 5 3 3. should be piped in parallel in two or more batteries Illustrated on. the following page are typical boiler room layouts and dimensional. data on the size requirements of gas fired hot water boilers INSTALLATION IN ENCLOSED BOILER ROOM REQUIRES. TWO UNOBSTRUCTED OPENINGS FOR PASSAGE OF,AIR INTO THE BOILER ROOM. 1 Air drawn horizontally from outdoors DIRECTLY,through an outside wall one louvered opening near.
the floor below burner air inlet and one louvered,opening near the ceiling above the highest draft. regulator each opening with a minimum FREE air, passage area of 1 square inch per 4000 BTUH of total. system input,2 Air drawn horizontally through HORIZONTAL DUCTS. one opening near the floor below burner inlet and one. opening near the ceiling above the highest draft,regulator each opening with a minimum FREE air. passage area of 1 square inch per 2000 BTUH of total. system input,3 Air drawn VERTICALLY from outdoors one opening.
at the floor and one opening at the ceiling each opening. with a minimum FREE air passage area of,1 square inch per 4000 BTUH of total system input. Figure 7 Correct location of combustion air supply ducts. 4 Air drawn from inside the building one opening near. the floor below burner inlet and one opening near the. ceiling above the highest draft regulator each opening. with a minimum FREE air passage area of,1 square inch per 1000 BTUH of total system input. IF BOILERS ARE INSTALLED ADJACENT TO OTHER FUEL,BURNING EQUIPMENT THE AREA OF FREE OPENINGS. MUST BE APPROPRIATELY INCREASED TO ACCOMMODATE,THE ADDITIONAL LOAD. UNLESS PROPERLY CONTROLLED AVOID THE USE OF,FORCED VENTILATION SINCE IT CAN CREATE AN.
UNDESIRABLE PRESSURE DIFFERENTIAL BETWEEN,BOILER ROOM AND AIR SOURCE. Figure 8 Typical layouts for gas fired systems, VENTING A GAS FIRED SYSTEM Run breeching as high as clearance permits to obtain maximum. A boiler venting system provides an escape path for the products of vertical rise of individual boiler vents Note that this does not alter. combustion There are three major components for venting a gas fired chimney height the height from hood skirt to chimney top The. Caravan a draft hood for each module a breeching manifold and a portion of chimney height rising directly above each hood is most. chimney effective in preventing spillage When the boiler room is in unheated. space insulate vent pipe and breeching to maintain flue gas temper. Draft Hood ature and good chimney operation It is not permitted to lower draft. The draft hood is part of each boiler module although shipped in a hood skirt height to achieve pitch or to compensate for low. separate carton It compensates for excessive draft that can be ceilings For some combinations of low chimneys ceilings and long. caused by the venturi effect of winds passing over the top of the chim breeching a draft inducer may be needed Inducers when required. ney The dimensional relationships between the draft hood the boiler are locally specified and warrantied The breeching should extend. and surface on which the boiler is mounted are critical These factors into but not beyond the chimney liner. are all interdependent in allowing the draft hood to function without. moving parts Attempts to alter these dimensions can result in unsafe Chimney. operating conditions Caravan gas fired modular boilers operate efficiently with masonry or. Note When mounting the modules on a raised platform be certain prefabricated chimneys as well as with Type B or double walled. the platform extends past the edge of the modules at least 3 inches metal vent pipe This latter type of chimney construction is generally. on all sides the least expensive Chimney height is usually governed by the. building height and the size of the boilers see Table 1 However the. chimney should be high enough to minimize the effects of turbulent. Breeching is a term used to describe a manifold s that connects. winds and pressure common near roof top obstruction A vent cap. individual boiler modules to a chimney Breeching is usually construct. should be used where permitted for additional protection against. ed of sheet metal having a smooth interior surface with all joints made. adverse wind conditions and precipitation The National Board of Fire. tight against leakage Pitch breeching up toward chimney Horizontal. Underwriters recommend that the chimney should extend at least 3. breeching size should be maintained for the total length Any transi. feet above the roof and be 2 feet higher than any obstruction within 10. tions should be made after 4 modules Connection should be made at. a 45 angle in the direction of the chimney See figure 10. Sizing Horizontal Breeching Connectors and Chimneys for Gas. Fired Systems, Table 2 Breeching dimensions for gas fired systems Horizontal breeching connectors shall be constant sized The chimney. GGT and GGHT series hot water boilers and the horizontal breeching connector are sized using Table 2. Consists of Chimney Height When there are multiple banks of boilers the horizontal breeching. connector for each bank is sized using Table 2 To size the common. No of Module 20 25 30 50 horizontal breeching connector add up the total input and refer to. Model No Modules No Feet Feet Feet Feet Table 2 to size. GGT 600E 2 GG 300ES 12 10 10 9 The minimum chimney opening will be equal to the size of the largest. GGHT 700E 2 GG 350HES 12 12 10 10 horizontal breeching section connected to it. GGHT 750E 2 GG 375HES 12 12 12 10,GGHT 800E 2 GG 399HES 12 12 12 10. Horizontal Breeching Connector Length,GGT 900E 3 GG 300ES 14 12 12 12.
GGHT 1050E 3 GG 350HES 14 14 14 12, The MAXIMUM length of the horizontal breeching connector length. GGHT 1125E 3 GG 375HES 14 14 14 12, between the chimney and the closest boiler shall NOT be longer than. GGHT 1200E 3 GG 399HES 16 14 14 12 12 inches per inch of horizontal breeching connector diameter i e if. GGT 1200E 4 GG 300ES 16 14 14 12 the horizontal breeching connector is 16 D the MAXIMUM length. GGHT 1400E 4 GG 350HES 16 16 16 14 from the chimney to the first boiler would be 16 x 12 or 192 inches. GGHT 1500E 4 GG 375HES 16 16 16 14 The MINIMUM length shall be 12 inches regardless of the horizontal. GGT 1500E 5 GG 300ES 16 16 16 14 breeching connector diameter See figure 9. GGHT 1600E 4 GG 399HES 18 16 16 14,GGHT 1750E 5 GG 350HES 18 18 16 14. GGHT 1875E 5 GG 375HES 18 18 18 16,GGHT 2000E 5 GG 399HES 20 18 18 16. GGHT 2100E 6 GG 350HES 20 18 18 16,GGHT 2250E 6 GG 375HES 20 20 18 16.
GGHT 2400E 6 GG 399HES 20 20 20 18,GGHT 2450E 7 GG 350HES 20 20 20 18. GGHT 2625E 7 GG 375HES 22 20 20 18,GGHT 2800E 7 GG 399HES 22 22 20 18. GGHT 2800AE 8 GG 350HES 22 22 20 18,GGHT 3000E 8 GG 375HES 24 22 22 20. GGHT 3150E 9 GG 350HES 24 22 22 20,GGHT 3200E 8 GG 399HES 24 22 22 20. GGHT 3375E 9 GG 375HES 24 24 22 20,GGHT 3500E 10 GG 350HES 24 24 22 20.
GGHT 3600E 9 GG 399HES 26 24 24 20,GGHT 3750E 10 GG 375HES 26 24 24 22. GGHT 4000E 10 GG 399HES 26 26 24 22,Based on single row of modules with no elbows. Height measured from top of draft hood to top of chimney. NOTE For conditions other than those shown consult factory or. National Fuel Gas Code NFPA 54, 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. application Table 2a depicts the proper diameter Dim C of the connec. tor rise depending upon its total length top of the draft hoods to the. breeching above,Vent Connector Diameters 20 ft chimney F dim. Flue Outlet Size Connector Rise B,Model 3 High 2 High 1 High.
GG300ES 8 8 10 10,GG350HES 9 9 10 12,GG375HES 10 10 10 12. GG399HES 10 10 12 12,Based on single row of modules with no elbows. NOTE For conditions other than those shown consult factory or National Fuel. Gas Code NFPA 54, NOTE E dimensions from table 2 when designing breeching dia is the. same as chimney dia,Figure 9 Connector rise,Figure 10 Suggested venting system constructions. GAS PIPING, This section contains sizing and construction recommendations Individual gas lines to individual boiler modules should be 3 4.
for fuel supply piping to Caravan gas fired modular boiler diameter Size of gas main and header pipes depends on volume. systems Gas fired equipment must conform not only to codes of of gas required and acceptable pressure drop between meter and. local regulatory agencies but also to additional specifications that modules gas regulator valves Minimum pressure required at each. may be imposed by the utility or gas supplier Therefore the valve is 5 inches of water column for natural gas and 11 inches for. following information should be considered only as a guideline propane gas measured while all boilers and other gas fired. equipment on the same meter are firing Small variations in gas. Figure 11 illustrates a typical gas supply line installation It flow can be compensated for by adjusting gas regulator valves. consists of a main between the utility s meter box and the boiler However final pressure of gas header must vary no more than. system a main shut off valve sediment trap gas header pipe and 0 3 in of water column. drip legs on individual boilers,Table 3 Gas consumption rate. hot water boilers only Gas Main Sizing, To determine the correct pipe diameter for the gas main serving a specific Caravan. Gas system proceed as follows,Model No Consumption In CFH. a Follow the building plans find total length of straight pipe between supply from gas. GGT 600E 600 meter and boiler gas header, GGHT 700E 700 b Using data in Table 4 calculate equivalent linear length of screw pipe fittings used in. GGHT 750E 750 fabrications of main Add this to figure from step a to obtain equivalent total length. GGHT 800E 798 c Find Caravan gas consumption in cubic feet per hour from Table 3 in hot water. GGT 900E 900,GGHT 1050E 1050,GGHT 1125E 1125, d Multiply the system total hourly gas consumption by flow correction value from.
GGHT 1200E 1197 Table 5, GGT 1200E 1200 e Locate system s total equivalent pipe length in right column of Table 6. GGHT 1400E 1400 f Move vertically to the system s corrected flow rate calculated in step c If this value. GGHT 1500E 1500 falls between two of those listed select larger value. GGT 1500E 1500 g From this point move horizontally to the left column and read suggested pipe. GGHT 1600E 1596 diameter for gas main,GGHT 1750E 1750. GGHT 1875E 1875,GGHT 2000E 1995, GGHT 2100E 2100 Table 4 Equivalent linear length in feet of standard iron pipe fittings for natural gas. GGHT 2250E 2250,GGHT 2400E 2394 Elbow Valve,GGHT 2450E 2450 Size Medium Long Return Outlet. GGHT 2625E 2625 Inches Standard Sweep Sweep Gate Globe Angle Bend Tee. GGHT 2800E 2793,GGHT 2800AE 2800,GGHT 3000E 3000,1 2 0 84 0 52 0 41 0 031 2 50 1 12 1 25 1 66.
GGHT 3150E 3150 3 4 1 17 0 73 0 57 0 044 3 50 1 84 1 75 2 33. GGHT 3200E 3192 1 1 57 0 98 0 77 0 057 4 68 2 11 2 34 3 11. GGHT 3375E 3375 1 1 4 2 19 1 37 1 07 0 082 6 54 2 94 3 27 4 35. GGHT 3500E 3500,GGHT 3600E 3591,1 1 2 2 63 1 64 1 29 0 098 7 84 3 52 3 92 5 21. GGHT 3750E 3750 2 3 55 2 23 1 74 1 320 10 60 4 77 5 30 7 05. GGHT 4000E 3990 3 5 72 3 59 2 81 2 130 17 08 7 69 8 84 11 40. Figure 11 Typical gas supply line installation, Table 5 Characteristics of various fuel gases Table 6 Gas main sizing guide. Flow Nominal Equivalent,Iron Pipe Internal,10 20 30 40 50 60 70. Type Heating Correction Length of Pipe Feet,Size Diameter. of Gas Valve Factor Inches Inches, Natural 1000 Btu 1 00 1 4 364 32 22 18 15 14 12 11.
Propane 2500 Btu 1 10 3 8 493 72 49 40 34 30 27 25. per cubic foot 1 2 622 132 92 73 63 56 50 46, Consult fuel supplier for actual BTU value 3 4 824 278 190 152 130 115 105 96. 1 1 049 520 350 285 245 215 195 180,1 1 4 1 380 1 050 730 590 500 440 400 370. 1 1 2 1 610 1 600 1 100 890 760 670 610 560,2 2 067 3 050 2 100 1 650 1 450 1 270 1 150 1 050. 2 1 2 2 469 4 800 3 300 2 700 2 300 2 000 1 850 1 700. 3 3 068 8 500 5 900 4 700 4 100 3 600 3 250 3 000, 4 4 026 17 500 12 000 9 700 8 300 7 400 6 800 6 200. 80 90 100 125 150 175 200,1 4 364 11 10 9 8 8 7 6,3 8 493 23 22 21 18 17 15 14.
1 2 622 43 40 38 34 31 28 26,3 4 824 90 84 79 72 64 59 55. 1 1 049 170 160 150 130 120 110 100,1 1 4 1 380 350 320 305 275 250 225 210. Maximum capacity of pipe in cubic,1 1 2 1 610 530 490 460 410 380 350 320. feet of gas per hour for gas pres, sures of 0 5 psig or less and a 2 2 067 990 930 870 780 710 650 610. pressure drop of 0 3 inch water 2 1 2 2 469 1 600 1 500 1 400 1 250 1 130 1 050 980. column based on a 0 60 specific 3 3 068 2 800 2 600 2 500 2 200 2 000 1 850 1 700. gravity gas 4 4 026 5 800 5 400 5 100 4 500 4 100 3 800 3 500. THE BOILER STAGING CONCEPT The Caravan control system automatically compensates for. The heart of the Caravan boiler plant is a temperature actuated seasonal temperature changes It energizes more or fewer. control system that automatically stages only those boiler modules depending on changes of outside temperature system. modules needed to meet the heating demand in a given period water temperature or both Modules save energy by operating in. thereby conserving fuel long cycles at full rated output and maximum efficiency. In a staging control system each stage ordinarily activates one CONTROL SYSTEM SELECTION. boiler module With appropriate wiring multiple modules can be Slant Fin offers two controls to step fire a hot water Caravan sys. grouped within a stage tem The SC 3 and SC 9 controls fulfill a wide range of applica. tions They control the boiler system and are not intended to be. During a fluctuation in heating requirements a large central boiler the sole building temperature control They do not replace zoning. cycles on and off to match heat output to building demand A the system or the thermostats that control these zones. staged modular boiler system on the other hand will energize. only as many modules as the system load requires Only one SC 3 Control. stage cycles at a time The other stages remain off or operate. continuously thereby performing at peak efficiency For example The SC 3 control allows up to 3 stages in a Caravan system. in a 10 module boiler system with the heating load at 61 of Generally each stage controls 1 module However it is possible to. capacity six of the modules operate continuously at peak have more than 1 module activated with each stage. efficiency Fractional heating requirements are supplied by the. seventh cycling module while the remaining three modules are Standard programmable features include system activation or. off This is in contrast to a single large central boiler that simply de activation based on outdoor temperature minimum target. cycles on and off resulting in lower efficiency supply water temperature adjustable design target supply water. temperature adjustable delay between stages adjustable. Over sizing is a major factor in poor system efficiency Most of the outdoor temperature and indoor design temperatures. time a single central boiler is oversized Historical data shows. that many single central boilers are considerably oversized even The view menu on the control includes error messages actual. at the outdoor temperature for which they were designed outdoor air temperature actual supply water temperature. Modular boiler systems are not oversized by more than a portion target supply water temperature and running time for each stage. of one module regardless of the load, This control can be programmed as follows The SC 9 can be programmed as follows.
1 Outdoor reset The supply water temperature is, automatically adjusted up or down based on outdoor 1 Outdoor reset The supply water temperature is. temperature The control automatically controls the automatically increased as outdoor temperature. number of modules required to maintain required supply decreases and decreased as outdoor temperature. water temperature increases The control activates only the number of stages. required to maintain the required supply water, 2 Setpoint temperature The control can be programmed. to maintain a set supply water temperature The control temperature. automatically controls the number of modules activated to. maintain the setpoint temperature 2 Setpoint temperature The control maintains a set supply. water temperature The control activates only the number. of stages required to maintain the setpoint temperature. SC 9 Control, Setpoint temperature may be used for a Caravan system. The SC 9 control allows up to 9 stages of operation for space that is dedicated for use as volume water heating. heating domestic water or combination in a Caravan system. Generally each stage controls 1 module However it is possible to 3 Domestic hot water The domestic hot water controls. have more than one module activated with each stage override the SC 9 control for only those modules used to. heat the domestic hot water The modules for domestic. hot water are isolated from space heating system until. Standard programmable features include system activation or. de activation based on outdoor temperature minimum target sup demand for domestic hot water is satisfied The modules. ply water temperature adjustable design target supply water tem not used for domestic hot water heating remain under. perature adjustable delay between stages adjustable control of SC 9 control. outdoor and indoor design temperatures delay to allow. combustion air damper to open ability to provide equal run time Slant Fin offers domestic hot water control packages and. rotation of boiler modules fixed lead of a module when Caravan external tankless heaters as options for use with the SC 9. system activates first on last off or first on first off for modules control. control of primary circulator and periodic exercising of primary cir. culator when system is inactive, The view menu on the control includes error messages actual. outdoor air temperature actual supply water temperature. target water temperature running time for each stage and the dif. ference between supply water and return water,temperatures.
BILL OF MATERIALS FOR SC SERIES CONTROLLERS,Material List for SC 3 Material List for SC 9. SC 3 modular boiler control part 435 084 1 SC 9 modular boiler control part 435 085. 1 Outdoor sensor part 339 070 1 Outdoor sensor part 339 070. 1 Universal sensor to be used as supply water sensor 2 Universal sensors part 339 071. part 339 071 1 to be used as supply water sensor, 1 Plastic tie strap 1 can be used as return water sensor. 2 Plastic tie straps,Other Options include, 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. Domestic Hot Water Control Packages components include EMV valve setpoint aquastat L6006A with immersion well This is to. be used with external heat exchanger such as Caravan BP series brazed plate heat exchangers. Circulators switches wiring and other relays are provided by contractor. FIELD WIRING AT MODULES,SC 3 SYSTEM WIRING DIAGRAM.


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