Table of Contents
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D
Stainless Steel, Indirect Water Heaters
• INSTALLATION AND OPERATING INSTRUCTIONS
1. The heat transfer-medium must be water or other nontoxic fluid
having a toxicity rating or Class of 1, as listed in Clinical Toxicol-
ogy of Commercial Products, 5th edition.
2. The pressure of the heat transfer medium must be limited to a
maximum of 30 PSIG by an approved safety or relief valve.
E S I G N E D
Mega-Stor
• ENGINEERING MANUAL
• MAINTENANCE
• PARTS
CAUTION
Manufacturer of Hydronic Heating Products
P.O. Box 14818 3633 I. Street
Philadelphia, PA 19134
www.crownboiler.com
L
T O
E A D
TM
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Table of Contents
Related Manuals for Crown Boiler MS-26
Summary of Contents for Crown Boiler MS-26
- Page 1 E S I G N E D E A D Mega-Stor Stainless Steel, Indirect Water Heaters • INSTALLATION AND OPERATING INSTRUCTIONS • ENGINEERING MANUAL • MAINTENANCE • PARTS CAUTION 1. The heat transfer-medium must be water or other nontoxic fluid having a toxicity rating or Class of 1, as listed in Clinical Toxicol- ogy of Commercial Products, 5th edition.
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Page 2: Table Of Contents
CONTENTS Product Description ........2 Specifications ........2 III. -
Page 3: Product Description
Output Min flow Head loss (°f/hr) (Gal/hr) (Gal/hr) (MbH) (Gal/min) (ft w.c.) MS-26 MS-40 MS-53 MS-79 MS-119 12.7 MSH-40 MSH-53 Notes: AHRI ratings based on 77F DHW temperature rise (135F outlet temp) and 180F boiler supply temperature. The ratings in Table 2.1 were obtained at the heat source (boiler) output rates and heat source flow rates shown above. - Page 4 Vertical Tank Horizontal Tank HOT WATER OUT Horizontal Tank SHOWN WITH OPTIONAL AND T&P VALVE MOUNTING KIT FOR ( MS-26 Ð MS-53 ) MS-40H AND MS-53H HAND HOLE INSULATED HANDHOLE HOT WATER OUT (UNDER COVER) ( MS-79, MS-119 ) JACKET COVER T&P VALVE TAPPING...
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Page 5: Sizing
THESE SIZING PROCEDURES ARE PROVIDED AS A GUIDE TO ASSIST THE PROFESSIONAL CONTRACTOR IN SIZING MEGA-STOR TANKS. BECAUSE OF THE LARGE VARIETY OF DEMAND SITUATIONS ENCOUNTERED IN THE FIELD, CROWN BOILER COMPANY CANNOT GUARANTEE THE SUITABILITY OF THESE PROCEDURES TO ALL INSTALLATIONS. - Page 6 Table 3.2: Maximum Possible Continuous Draw (180f boiler Supply, 77f DHW Rise, 135f Outlet) Continuous Draw Min boiler Output Mega-Stor (Gal/min) (MbH) MS-26 MS-40 MS-53 MS-79 MS-119 MSH-40 MSH-53 Table 3.3: AHRI first Draw Rating* Draw Rate first Draw Rating...
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Page 7: Zone Design
IV. zONE DESIGN IMPORTANT All First Hour Ratings shown in this manual are based on the boiler water flow rates shown in Table 2.1. Read this section for information on sizing, piping and circulators for the Mega-Stor zone. In designing the Mega-Stor zone piping system the following points should be considered: 1) Circulator or Zone Valve Zoning? - Circulator zones are usually a better choice. - Page 8 PRESSURE DROP CAlCUlATIONS THROUGH MEGA-STOR zONE HEAD LOSS (FT W.C.) Flow Fitting Description Quantity 8.0 GPM 12.7 GPM Total MS-26, MSH-40 Coil MS-40 Coil MS-53, MSH-53 Coil MS-79 Coil MS-119 Coil 1 ft 1” St. Pipe 0.05 0.13 1 ft 1-1/4” St. Pipe 0.01...
- Page 9 ExAMPlE 1 Size a circulator for the Mega-Stor zone shown below. An MS-40 is to be used with an 8 GPM flow rate through the coil. 1) Using Worksheet 1, record the total number of fittings in Mega-Stor zone and piping common to all zones (piping shown in bold) in column (a).
- Page 10 PRESSURE DROP CAlCUlATIONS THROUGH MEGA-STOR zONE HEAD LOSS (FT W.C.) Flow Fitting Description Quantity 8.0 GPM 12.7 GPM Total MS-26 Coil, MSH-40 Coil MS-40 Coil MS-53, MSH-53H Coil MS-79 Coil MS-119 Coil 1 ft 1” St. Pipe 10 ft 0.05 0.13...
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Page 11: Before Starting Installation
V. bEfORE STARTING INSTAllATION 1) Be sure that the planned installation is in accordance with all local codes. 2) Be certain the domestic water supply to the tank has physical and chemical characteristics that fall within the limits shown in Table 5.1. Where questions exist as to the composition of the water on the job, a qualified water treatment expert should be consulted. -
Page 12: Piping
(and therefore the same flow) through the coil of each tank. The boiler manifold piping must be sized so that each coil has the flow rate called for in Table 2.1. For example, if two MS-26’s are to be manifolded together, the circulator and zone piping common to both tanks must be capable of moving 16 GPM (2 x 8GPM). - Page 13 fIGURE 7.1: bOIlER-SIDE PIPING USING CIRCUlATOR zONES fIGURE 7.2: bOIlER-SIDE PIPING USING zONE VAlVES (2-WAy)
- Page 14 fIGURE 7.3: bOIlER-SIDE PIPING USING A THREE WAy zONE VAlVE fIGURE 7.4: bOIlER-SIDE PIPING fOR MUlTIPlE MEGA-STORS...
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Page 15: Domestic Piping
2) DOMESTIC SIDE PIPING bASIC DOMESTIC PIPING Figure 7.6A shows typical domestic water piping for a Mega-Stor. All components except the control are provided by the installer. The function of the components shown are as follows: a) Temperature Control (required) - This control is provided by Crown and must be installed in the aquastat well location of the water heater indicated in Figure 2.2. -
Page 16: Domestic Water Piping For Distant Fixtures
fIGURE 7.5: AqUASTAT INSTAllATION MEGA-STOR PIPING WITH A “TEMPERATURE lIMITING VAlVE” Usually, the maximum temperature of the outlet water will stay near the setting of the Mega-Stor control. In some cases, however, hot water usage patterns can cause the outlet water temperature to rise significantly above the control setting. The temperature of water going to the fixtures may be more carefully controlled through the use of a thermostatic mixing valve. - Page 17 “Max T&P Valve Capacity.” pressure drop through each tank, resulting in an even Model Max T&P Valve Capacity (bTU/hr) flow rate through each tank. MS-26 172,800 Each tank must have its own T&P valve. It is recom- MS-40 181,800 mended that each tank be equipped with its own isola-...
- Page 18 7.6b: CORRECT TEMPERATURE & PRESSURE VAlVE PIPING fOR MS-26, MS-40, MS-53 fIGURE 7.6C: CORRECT TEMPERATURE & PRESSURE VAlVE PIPING fOR MS-79, MS-119...
- Page 19 fIGURE 7.8: DOMESTIC HOT WATER PIPING USING A MIxING VAlVE fIGURE 7.9: DOMESTIC WATER PIPING fOR DIS- TANT fIxTURES USING A RECIRCUlATION lINE Expansion Tank To Fixtures Required Cold Water In Bronze or Stainless Steel Circulator Insulate Dashed Check Valves Piping Crown Mega-Stor Keep these tees as...
- Page 20 fIGURE 7.10: DOMESTIC HOT WATER PIPING USING MUlTIPlE MEGA-STORS...
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Page 21: Wiring
VIII. WIRING The following general notes apply to all wiring: 1) Wiring must be done in accordance with all codes. In the absence of any codes the system must be wired in accordance with the National Electric Code (ANSI/ZFPA 70-1990). 2) The Mega-Stor is equipped with Honeywell L4006A series temperature control. - Page 22 CIRCUlATOR zONE WIRING (PRIORITy) Figure 8.2 is a connections diagram for priority circulator zoning. This system is similar to non-priority circulator zoning except that a Honeywell R8285B relay is used in place of the R845A on the Mega-Stor zone. This relay is equipped with its own 24 volt transformer and D.P.D.T.
- Page 23 fIGURE 8.2: CIRCUlATOR zONING (PRIORITy) fIGURE 8.3: zONE VAlVE WIRING (2-WAy VAlVES, NON-PRIORITy)
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Page 24: Start-Up And Check-Out
fIGURE 8.4: zONE VAlVE WIRING (2-WAy VAlVES, PRIORITy) Ix. START-UP AND CHECK-OUT 1) Make sure that the system is free of leaks and that air is purged from the system. IMPORTANT WARNING Fix any leaks found before proceeding further. Leakage from Never attempt to fill a hot empty boiler the boiler piping can result in severe damage to the boiler. -
Page 25: Maintenance
For the most energy efficient operation, adjust the aquastat for the minimum water temperature necessary to meet domes- tic water needs. Because hot water presents a scald hazard, it is best to set the thermostat at 120ºF or lower and raise it only if necessary to provide adequate hot water. -
Page 26: Parts
xI. PARTS Key # Part # Description qty./Tank 35-3200 Thermostat (L4006A2114) 20-021 Handhole Cover 20-022 “O” Ring Gasket 20-023 Handhold Cover Bracket 90-025 M10 Nut 20-024* Handhold Jacket Cover Notes: All part numbers are per item. *This part not used on MS-79 or MS-119... - Page 28 Manufacturer of Hydronic Heating Products P.O. Box 14818 3633 I. Street Philadelphia, PA 19134 www.crownboiler.com PN 98-060 • 05/13 Rev 6...
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