BTC SST150-40 Installation And Operating Manual

Indirect fired water heaters

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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 ﬂ uid

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.

DANGER

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 BTC 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 ﬂ uid 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...
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 Indirect Fired Water Heaters Installation and Operating Manual...
Page 4: Important Information
Installation & Operating Manual Explanation Of Symbols Please Read Before Proceeding Key To Symbols DANGER: Installer – Read all instructions before installing. Warnings Perform steps in the order given. Have this  indirect water heater serviced/inspected by a qualiﬁ ed service technician, at least Warnings in this document are identiﬁ...
Page 5 Installation & Operating Manual When Servicing the Indirect Water Heater - DANGER: HOT WATER CAN SCALD! To avoid severe burns, allow the appliance to cool before performing maintenance. Water heated to temperatures for clothes  washing, dish washing, and other sanitizing Indirect water heater operation –...
Page 6: General Information
3 1/4 9 1/4 31 3/4 60 1/4 1268 NOTES: 1. RELIEF VALVE CONNECTION 1. 1” NPT ON SST150-40. 2. HOT WATER OUTLET 22.5° 3. BOILER WATER IN 45° 4. BOILER WATER OUT 5. DRAIN/COLD WATER INLET 1-1/2” NPT (SEE NOTE 1) 2 3/4”...
Page 7: Pre-Installation
Max. drain pan or in an area with a drain is not the responsibility of the manufacturer or Bosch Thermotechnology Corp. (BTC).. Chloride (PPM) 4. The tank may be located some distance from the boiler provided the pump is designed to provide the ﬂ ow called for in Table 3B - Pressure Drop Values, through the coil.
Page 8: Boiler Side Piping
SST300-80 instead of radiation. As on any circulator zone system check valves should be installed in each zone to prevent SST150-40 unwanted circulation through zones which are not calling for heat. Figure 3-3 illustrates typical circulator zone piping with a ﬂ oor standing G115WS, G125BE, GB125BE, or G215 boiler.
Page 9 Installation & Operating Manual SEPARATOR WATER ANTI-SCALD MIXING VALVE GB 142 COLD BOILER WATER TANK PRESSURE RELIEF PUMP VALVE SEPARATOR TANK SENSOR FROM SYSTEM SYSTEM SYSTEM CHECK VALVE PUMP BALL VALVE (TYPICAL) Y-STRAINER DRAIN (RECOMMENDED) POINT RECIRCULATION EXPANSION PUMP SST series tank TANK DRAIN ( FIELD SUPPLY )
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 PUMPS (TYPICAL) MAKE UP WATER AIR SEPARATOR EXPANSION TANK WATER ANTI-SCALD MIXING VALVE GB 142 COLD BOILER...
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 PUMPS (TYPICAL) MAKE UP WATER AIR SEPARATOR EXPANSION TANK WATER BALL VALVE ANTI-SCALD TANK MIXING VALVE...
Page 12 Installation & Operating Manual SEPARATOR WATER GB 142 ANTI-SCALD MIXING VALVE BOILER COLD WATER TANK RECIRCULATION PUMP PUMP SEPARATOR CHECK VALVE PRESSURE RELIEF VALVE FROM SYSTEM (TYPICAL) SYSTEM SYSTEM BALL VALVE PUMP TANK SENSOR (TYPICAL) Y-STRAINER (TYPICAL) DRAIN (RECOMMENDED) POINT EXPANSION TANK DRAIN...
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 ﬁ xture 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 tempering valves or mixing valves. An anti-scald valve WARNING: mixes cold water in with the outgoing hot water to assure that hot water reaching a building ﬁ...
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.
Page 16 Installation & Operating Manual SHOCK ARRESTOR UNION SHUTOFF VALVE (TYPICAL) SHUTOFF ANTI-SCALD SHUTOFF VALVE VALVE MIXING VALVE FROM BOILER SHUTOFF TO BOILER 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...
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 following items should be checked out on an annual Review homeowner’s maintenance responsibilities basis or sooner if needed to ensure a reliable supply of hot and their frequencies, including any not listed in the water: 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. DANGER: Do not use automotive, ethylene glycol or  petroleum-based antifreeze. These types of antifreezes are toxic and could cause severe personal injury or death if leakage into the domestic hot water supply occurs.
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 Gal. Btu/hr 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 ﬂ...
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...
Page 25 Installation & Operating Manual NOTES: | 25 Indirect Fired Water Heaters Installation and Operating Manual...
Page 26 Installation & Operating Manual 2 6 | Indirect Fired Water Heaters Installation and Operating Manual...
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: 603-965-7581 www.bosch-climate.us BTC 471003301 C / 06.2013 SST-I-O Rev C...

This manual is also suitable for:

Sst250-65 Sst300-80 Sst450-119