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Table of Contents
Indirect Fired Water Heaters
Installation and Operating Manual
Models: SST150-40
SST250-65
SST300-80
SST450-119
CAUTION
The heat transfer medium must be water or other nontoxic fluid
having a toxicity rating or class of 1, as listed in Clinical
Toxicology of Commercial Products, 5th edition
The pressure of the heat transfer medium must be limited to a
maximum of 30 PSIG by an approved safety or relief valve.
WARNING
This manual must only be used by a trained heating installer /
service technician. Read all instructions before installing.
Perform steps in the order given. Failure to comply could result
in severe personal injury, death, or substantial property
damage.
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Summary of Contents for Bosch SST150-40
- Page 1 Indirect Fired Water Heaters Installation and Operating Manual ® Models: SST150-40 CAUTION SST250-65 The heat transfer medium must be water or other nontoxic fluid having a toxicity rating or class of 1, as listed in Clinical SST300-80 Toxicology of Commercial Products, 5th edition...
- Page 2 Installation & Operating Manual Indirect Fired Water Heaters Installation and Operating Manual...
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Page 3: Table Of Contents
Installation & Operating Manual Table of Contents 1 General Information 2 Pre-installation 3 Boiler Side Piping 4 Domestic Side (Tank) Piping 5 Wiring 6 Start-up and Check-out 7 Maintenance 8 Performance Data Limited Lifetime Warranty Indirect Fired Water Heaters Installation and Operating Manual... -
Page 4: Hazard Definitions
Installation & Operating Manual Hazard Definitions The following defined terms are used throughout this DANGER manual to bring attention to the presence of hazards of various risk levels or to important information concerning DANGER indicates an imminently hazardous situation the life of the product. which, if not avoided, will result in death or serious injury. -
Page 5: Please Read Before Proceeding
Installation & Operating Manual WARNING Please Read Before Proceeding If the information in this manual is not followed exactly, a fire or explosion may result causing WARNING property damage, personal injury or loss of life. Installer – Read all instructions before installing. This appliance MUST NOT be installed in any location Perform steps in the order given. -
Page 6: General Information
“E” WEIGHT “F” “F” PART NO. FULL OF WATER (in.) (in.) (in.) (in.) (in.) (in.) (lbs.) SST150-40 8 1/4 48 1/2 25 1/4 3 1/4 9 1/4 52 1/2 SST250-65 SST300-80 3 1/4 9 1/4 61 3/4 SST450-119 3 1/4... -
Page 7: Pre-Installation
Installation & Operating Manual 2 Pre-installation Locating the Tank 1. The installation must conform to the instructions in this manual and all applicable local, state, provincial, and 1. Choose a location for your water heater centralized to national codes, laws, regulations, and ordinances. the piping system. -
Page 8: Boiler Side Piping
As on any circulator zone system SST300-80 check valves should be installed in each zone to prevent unwanted circulation through zones which are not calling SST150-40 for heat. Figure 3-2 illustrates typical circulator zone piping. Zone with Valve to Aquastat... - Page 9 Installation & Operating Manual WATER ANTI-SCALD MIXING VALVE GB 142 COLD BOILER WATER DOMESTIC HOT WATER CIRCULATOR PRESSURE RELIEF VALVE SEPARATOR TANK SENSOR / SYSTEM SUPPLY AQUASTAT SENSOR FROM SYSTEM SYSTEM SYSTEM CHECK VALVE BALL VALVE CIRCULATOR (TYPICAL) Y-STRAINER (RECOMMENDED) DRAIN POINT RECIRCULATION...
- Page 10 Installation & Operating Manual ZONE #1 ZONE #1 PRESSURE PRESSURE ZONE #2 ZONE #3 ZONE #4 ZONE #2 ZONE #3 ZONE #4 REDUCING VALVE GAUGE BACKFLOW PREVENTER ZONE CIRCULATORS (TYPICAL) MAKE UP WATER SYSTEM SUPPLY SENSOR (WHEN USED) AIR SEPARATOR EXPANSION TANK WATER...
- Page 11 Installation & Operating Manual ZONE #1 ZONE #1 PRESSURE PRESSURE ZONE #2 ZONE #3 ZONE #4 ZONE #2 ZONE #3 ZONE #4 REDUCING VALVE GAUGE BACKFLOW PREVENTER ZONE VALVES (TYPICAL) SYSTEM SUPPLY MAKE UP WATER SENSOR (WHEN USED) DIFFERENTIAL PRESSURE BYPASS AIR SEPARATOR SYSTEM VALVE (IF USED)
- Page 12 Installation & Operating Manual WATER ANTI-SCALD GB 142 MIXING VALVE BOILER COLD WATER RECIRCULATION PUMP SEPARATOR CHECK VALVE SYSTEM SUPPLY PRESSURE SENSOR RELIEF VALVE FROM (TYPICAL) SYSTEM SYSTEM SYSTEM BALL VALVE CIRCULATOR TANK SENSOR/ (TYPICAL) Y-STRAINER AQUASTAT (RECOMMENDED) (TYPICAL) DRAIN POINT EXPANSION TANK...
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Page 13: Domestic Side (Tank) Piping
Installation & Operating Manual 4 Domestic Side (Tank) Piping Basic Domestic Piping Domestic Water Piping for Distant Fixtures Figure 4-2 shows typical domestic water piping for a tank. In some cases the furthest fixture may be quite distant The function of the components shown are as follows: from the tank. - Page 14 Installation & Operating Manual Anti-scald Valves (Mixing Valves) Temperature & Pressure (T&P) Relief Valve Anti-scald valves used with water heaters are also called WARNING tempering valves or mixing valves. An anti-scald valve mixes cold water in with the outgoing hot water to assure For protection against excessive temperatures and that hot water reaching a building fixture is at a pressure, install temperature and pressure...
- Page 15 T&P relief valve discharge piping must be: - made of material serviceable for a temperature of - SST150-40 - 3/4” NPT with a minimum AGA Rating of 250°F or greater. 105,000 Btu/hr. - directed so that hot water flows away from all persons.
- Page 16 Installation & Operating Manual SHOCK ARRESTOR UNION SHUTOFF VALVE (TYPICAL) SHUTOFF ANTI-SCALD SHUTOFF VALVE VALVE MIXING VALVE TO BOILER FROM BOILER SHUTOFF VALVE BACKFLOW PREVENTER EXPANSION TANK TANK SENSOR / AQUASTAT CHECK VALVE RECIRCULATION PUMP SST SERIES TANK DRAIN ( FIELD SUPPLY) Figure 4-2 Recommended domestic water piping NOTICE Please note that these illustrations are meant to show...
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Page 17: Wiring
Installation & Operating Manual 5 Wiring Wiring using boiler sensor: 1. For wiring using boiler sensor, see boiler installation manual. Indirect Water Heater Controlled Using Aquastat and Zone Circulator / Valve: 1. Install Aquastat to tank. Aquastat control (Honeywell L4006 or equivalent) can be ordered from your local distributor. -
Page 18: Start-Up And Check-Out
Installation & Operating Manual 6 Start-up and Check-out 1. Make sure the system is free of leaks and that air is purged from the system. CAUTION Fix any leaks found before proceeding further. Leakage from the boiler piping can result in severe damage to the boiler. -
Page 19: Maintenance
Installation & Operating Manual 7 Maintenance The SST series indirect water heater is an extremely Review homeowner’s maintenance responsibilities simple device and as such requires very little maintenance. and their frequencies, including any not listed in the There are, however, several items which should be following section. - Page 20 Installation & Operating Manual as listed in the “Clinical Toxicology of Commercial Products”. A maximum 50/50 mixture of inhibited propylene glycol is recommended. Follow the antifreeze manufacturer’s instructions. WARNING Do not use automotive, ethylene glycol or petroleum-based antifreeze. Do not use any undiluted antifreeze.
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Page 21: Performance Data
Heat Loss Rating Rating Rate from Source Friction Gal. Volume F/hr Gal/hr Gal/hr Heat Source Flow Rate Loss Feet Btu/hr Gal. SST150-40 40.0 115,000 14.0 SST250-65 67.0 154,000 14.0 SST300-80 81.5 171,000 14.0 SST450-119 113.4 216,000 14.0 • These ratings were obtained with a heat source output and heat source flow rate as listed in the chart using the parameters of the Domestic Cold Water Inlet at 58°F,... - Page 22 Installation & Operating Manual How to Properly Size Your Indirect Water Heater Use the First Hour Rating (FHR) to properly size your Indirect Water Heater. The First Hour Rating is the amount of hot water in gallons the heater can supply per hour (starting with a tank full of hot water), depending on tank capacity, source of heat, and the size of the burner.
- Page 23 Installation & Operating Manual First Hour Rating - 180°F Boiler Loop Water (Universal Sizing - 45,000 - 295,000 Btu/hr) Table 8B Model SST150-40 SST250-65 Circulator Flow (GPM) Domestic Outlet 45,000 60,000 75,000 95,000 115,000 140,000 165,000 195,000 225,000 260,000 295,000...
- Page 24 Installation & Operating Manual First Hour Rating - 180°F Boiler Loop Water (Universal Sizing - 45,000 - 295,000 Btu/hr) Table 8C Model SST300-80 SST450-119 Circulator Flow (GPM) Domestic Outlet 45,000 60,000 75,000 95,000 115,000 140,000 165,000 195,000 225,000 260,000 295,000 Max BTU Input 115,860 139,106...
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Page 25: Limited Lifetime Warranty
Installation & Operating Manual Limited Lifetime Warranty for Domestic Hot Water Tank Installed in a Residential Application Subject to the terms and conditions set forth below, Bosch This warranty does not cover: Thermotechnology Corporation, Londonderry, New Hampshire TANK installed in buildings other than one or two family (“BTC”) hereby extends the following limited warranties to the... - Page 26 This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state. explosion, electrochemical reaction, water and air impurities, Bosch Thermotechnology Corp. • 50 Wentworth Avenue • Londonderry, NH 03053 Tel: (603) 552-1100 Fax: (603) 584-1681 Effective 6/1/2008...
- Page 27 Installation & Operating Manual | 27 Indirect Fired Water Heaters Installation and Operating Manual...
- Page 28 United States and Canada Bosch Thermotechnology Corp. 50 Wentworth Avenue Londonderry, NH 03053 Tel: 603-552-1100 Fax: 603-584-1681 www.bosch.us BTC 471003301 A / 09.2010 SST-I-O Rev A...
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