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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.
SDT
Solar Dual Coil Tank
Installation & Operation
Manual
Models: SDT/SET065 - 119
Solar Electric Tank
This manual must only be used by
WARNING
a qualified 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.
Save this manual for future reference.
SDT-SET-I-O Rev D
SET
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Table of Contents
Related Manuals for Lochinvar Squire SDT119
Summary of Contents for Lochinvar Squire SDT119
- Page 1 SDT-SET-I-O Rev D Installation & Operation Manual Models: SDT/SET065 - 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...
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Page 2: Table Of Contents
Contents HAZARD DEFINITIONS ............ 2 Install Drain Valve ............12 PLEASE READ BEFORE PROCEEDING ......3 Temperature and Pressure (T&P) Relief Valve ..12 1. GENERAL INFORMATION Table 4A - Minimum Relief Valve (AGA Rating) ... 13 Operating Restrictions ............4 5. -
Page 3: Please Read Before Proceeding
SDT/SET Installation & Operation Manual Please read before proceeding Installer – Read all instructions before Failure to adhere to the guidelines on this WARNING WARNING installing. Perform steps in the order given. page can result in severe personal injury, death, or substantial property damage. Have this indirect water heater serviced/ When servicing the indirect water heater –... -
Page 4: General Information
Component Material Tank 316L Steel Stainless Steel Coil 304L Stainless Steel Insulation Polyurethane Jacket Polypropylene / ABS Figure 1-1 Lochinvar SDT and SET Series Indirect Water Heaters 1. RELIEF VALVE CONNECTION WEIGHT “E” “F” “G” “I” “A” “B” “C” “D”... -
Page 5: Pre-Installation
Max. be located in an area with a floor drain or installed in a drain pan suitable for water heaters. Lochinvar shall not be held liable for any such water damage. Chloride (PPM) The tank may be located some distance from the boiler... -
Page 6: Boiler Side Piping (Sdt Models)
SDT/SET Installation & Operation Manual Boiler Side Piping (SDT models) Multiple Tank Connections (Boiler Side) Figures 3-1 thru 3-4 show typical boiler side piping for several common situations. Regardless of which system is Multiple tank installations must be done in the “reverse-return” used it is imperative that the flow rates called for in Table manner. - Page 7 COIL SQ FT SQ FT COIL MODEL (FT / HD) (FT / HD) LENGTH CONN. LENGTH SURFACE SURFACE (FT) AREA AREA (IN) (FT) SDT065 41.5 13.5 0.61 1.57 3.53 6.27 1.03 2.31 6.41 SDT080 41.5 13.5 0.61 1.57 3.53 6.27 1.03...
- Page 8 SDT/SET Installation & Operation Manual Boiler Side Piping (SDT models) Figure 3-1 Piping Diagram Zoned with Circulators ZONE #1 ZONE ZONE ZONE PRESSURE PRESSURE REDUCING VALVE GAUGE BACKFLOW PREVENTER ZONE CIRCULATORS MAKE UP (TYPICAL) WATER SYSTEM SUPPLY SENSOR (WHEN USED) AIR SEPARATOR EXPANSION TANK...
- Page 9 SDT/SET Installation & Operation Manual Boiler Side Piping (SDT models) (continued) Figure 3-2 Piping Diagram Zoned with Valves ZONE #1 ZONE ZONE ZONE PRESSURE REDUCING VALVE PRESSURE GAUGE BACKFLOW PREVENTER MAKE UP ZONE VALVES WATER (TYPICAL) SYSTEM SUPPLY SENSOR DIFFERENTIAL (WHEN USED) PRESSURE SYSTEM...
- Page 10 SDT/SET Installation & Operation Manual Boiler Side Piping (SDT models) Figure 3-3 Knight Boiler Primary / Secondary Piping Please note that these illustrations are meant to show system piping concept only, the installer is responsible NOTICE for all equipment and detailing required by local codes.
- Page 11 SDT/SET Installation & Operation Manual Boiler Side Piping (SDT models) (continued) Figure 3-4 Multiple Tank Connections PRESSURE REDUCING VALVE BACKFLOW PRESSURE PREVENTER GAUGE MAKE UP WATER AIR SEPARATOR SYSTEM SUPPLY SENSOR FROM SYSTEM SYSTEM NOT TO EXCEED 4 PIPE DIA. OR A MAXIMUM OF 12”...
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Page 12: Domestic Side (Tank) Piping Basic Domestic Piping
SDT/SET Installation & Operation Manual Domestic Side (Tank) Piping Domestic Water Piping for Distant Fixtures Basic Domestic Piping In some cases the furthest fixture may be quite distant from the Figure 4-2 on page 15 shows typical domestic water piping for a tank. -
Page 13: Anti-Scald Valves (Mixing Valves)
SDT/SET Installation & Operation Manual Domestic Side (Tank) Piping (continued) Temperature & Pressure (T&P) Relief Valve Anti-scald Valves (Mixing Valves) For protection against excessive temperatures Anti-scald valves used with water heaters are also called WARNING and pressure, install temperature and tempering valves or mixing valves. -
Page 14: Temperature And Pressure (T&P) Relief Valve
- SDT/SET065/080/119 - 3/4" NPT with a relief valve and discharge line. minimum CSA Rating of 200,000 Btu/hr. - terminated within 6" of the floor. The Lochinvar SDT/SET series water NOTICE heaters will absorb/store less than 200,000 T&P relief valve discharge piping must not be: Btu/hr when domestic water outlet - excessively long. - Page 15 SDT/SET Installation & Operation Manual Domestic Side (Tank) Piping (continued) Figure 4-2 Recommended Domestic Water Piping SDT/SET models SHOCK ARRESTOR UNION SHUTOFF VALVE (TYPICAL) ANTI-SCALD MIXING VALVE SHUTOFF SHUTOFF VALVE VALVE FROM BOILER TO BOILER (SDT MODELS ONLY) SHUTOFF VALVE BACKFLOW PREVENTOR EXPANSION...
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Page 16: Wiring
SDT/SET Installation & Operation Manual Wiring Electrical Connection (Squire solar water heater with electric back up only -- SET models only) Tank must be full before the unit is turned on! The heating element will be damaged if energized for even WARNING a short period of time while tank is dry! Be sure to ground the water heater. - Page 17 SDT/SET Installation & Operation Manual Wiring (continued) Table 5A Wiring SET065-SET119 SET Wiring (Single Element) Model Volts / Phase Watts / AMPS Breaker Type *Wire Gage SET065 240 VAC / 1 Ph 4500 / 18.3 25 AMP / DPDT 12 ga. THHW SET080 240 VAC / 1 Ph 4500 / 18.3...
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Page 18: Indirect Water Heater Sensor Setup (Knight Boiler)
SDT/SET Installation & Operation Manual Wiring Indirect Water Heater Sensor Setup (Knight Boiler) Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and CAUTION dangerous operation. The supplied sensor contains an Auto Reset High Limit (194°F). NOTICE Install tank sensor Connect tank sensor... -
Page 19: Indirect Water Heater Controlled Using Aquastat And Zone Circulator
(continued) Indirect Water Heater Controlled Using Aquastat and Zone Circulator / Valve Install Aquastat to tank. Aquastat control (TST20016) can be ordered from your local Lochinvar distributor. Connect Aquastat to the zone controller for the Indirect Water Heater Zone. Adjust Aquastat to the desired temperature. -
Page 20: Start-Up And Check-Out
SDT/SET Installation & Operation Manual Start-up and Check-out 1. Make sure the system is free of leaks and that air is purged from the system. Fix any leaks found before proceeding CAUTION further. Leakage from the boiler piping can result in severe damage to the boiler. 2. -
Page 21: Maintenance
SDT/SET Installation & Operation Manual Maintenance The Lochinvar SDT/SET series indirect water heater is an Homeowner monthly maintenance to include: extremely simple device and it requires very little maintenance. Visually check valves, pipes, and fittings for leaks. Call a There are, however, several items which should be inspected qualified service technician to repair leaks. -
Page 22: Performance Data
Gallons 65 ° F Rise 90 ° F Rise 115 ° F 140 ° F Boiler Solar SDT065 128,000 SDT080 128,000 SDT119 217,000 Amount of water drawn from tank with no energy input How to Properly Size Your Indirect Water Heater Use the First Hour Rating (FHR) to properly size your indirect water heater. -
Page 23: Performance Data Charts
Note: Testing conducted with 50°F inlet cold water Table 8D First Hour Rating - 180°F Boiler Loop Water (Universal Sizing. Upper Coil SDT Models) First Hour Rating - 180°F Boiler Loop Water (Universal Sizing - 45,000 - 295,000 Btu/hr / SDT065-SDT119) Model SDT065... - Page 24 SDT/SET Installation & Operation Manual Performance Data Table 8E First Hour Rating 200°F Boiler Loop Water (Universal Sizing, Upper Coil SDT Models) First Hour Rating - 200°F Boiler Loop Water (Universal Sizing - 45,000 - 295,000 Btu/hr / SDT065-119) Model SDT065 SDT080...
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Page 25: High Output Piping
SDT/SET Installation & Operation Manual High Output Piping High Domestic Hot Water Usage Parallel Piping With this style of installation, both heat exchanger are used at When a large amount of hot water is required by a Domestic the same time. Solar / boiler supply piping to the solar water Hot Water system, the dual coil indirect water heater can be IN and boiler coils will be at the same temperature at the piped together when given the high volume needed to satisfy... - Page 26 Loop Draw Rating Max Input BACKFLOW REDUCING VALVE Temperature GAL/HR* GAL* BTU/HR PREVENTER PRESSURE 180° F 284,886 GAUGE SDT065 180° F 293,133 SDT080 MAKE UP WATER SYSTEM SUPPLY 180° F 397,341 SDT119 SENSOR SEPARATOR * Tank temperature 140°F. FROM SYSTEM NOT TO EXCEED 4 PIPE DIA.
- Page 27 Loop Draw Rating Max Input REDUCING BACKFLOW Temperature GAL/HR* GAL* BTU/HR VALVE PREVENTER PRESSURE 180° F 253,399 SDT065 GAUGE 180° F 257,897 SDT080 MAKE UP WATER SYSTEM 180° F 349,360 SUPPLY SDT119 SENSOR SEPARATOR * Tank temperature 140°F. FROM SYSTEM SYSTEM NOT TO EXCEED 4 PIPE DIA.
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Page 28: Revision Notes
Revision Notes: Revision A (ECO C05788) initial release. Revision B (ECO C05936) reflects the addition of “High Output Piping” section on pages 25-27, Series and Parallel piping diagrams on pages 26-27, and new friction loss charts for SDT Series and Parallel on pages 26 and 27. Revision C (ECO C06300) reflects the update of tank images and additional CSA cautions on manual cover, “Connect tank sensor”...
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