Lochinvar SDT/SET065 User's Manual
Contents
1. _ Y STRAINER ei EES BALL VALVE e TYPICAL FLOW CHEC TEMPERATURE a BOILER VALVE PRESSURE W circuLator RELIEF VALVE si BOILER TANK SENSOR AQUASTAT BOILER BACKUP HEAT EXCHANGER SOLAR SENSOR n SDT MODELS ONLY l lge TEMPERATURE 8 PRESSURE GAUGE l TYPICAL if y Y FROM UNIN l T SOLAR T TYPICAL RSC eps TO TEMPERATURE g SOLAR PRESSURE n GAUGE ee 7 SS DRAI DT RECIRCULATION PRESSURE Ki PUMP RELIEF VALVE SOLUTION BOILER SQUIRE CHECK VALVE SOLAR DRAIN eater rey HEAT EXCHANGER FIELD SUPPLY AUXILIARY CATCH PAN NOTICE Please note that these illustrations are meant to show system piping concept only the installer is responsible for all equipment and detailing required by local codes NOTICE Please note that the installer is responsible for ensuring DHW prioritization when piped as a zone 8 Squire Installation amp Operation Manual Stainless Sg Iudirect Water Heater 3 Boiler Side Piping SDT models continued Figure 3 2 Piping Diagram Zoned with Valves PRESSURE REDUCING VALVE LA Ee Pt RI NN i SYSTEM SUPPLY SENSOR WHEN USED s m BACKFLOW HAUGE PREVENTER MAKE UP WATER AIR SEPARATOR EOR tS gt L EXPANSION TANK i i 8 NOT TO EXCEED 4 PIPE DIA DRAIN POINT OR A MAXIMUM OF 12 APART TYPICAL H 8 Y STRAINER BALL VALVE R TYPICAL P BOILER A CIRCULATOR x BOILER BACKUP HEAT EX2. Figure 9 2 Indirect Boiler with Parallel Piping PRESSURE BACKFLOW ae Model PREVENTER 1 PRESSURE jag Zeg SDT065 EE RI NN il il MAKE UP WATER SDT080 293 133 Table 9C Series Configuration SYSTEM SUPPLY AIR _ SENSOR SDT119 397 341 SEPARATOR TO a i T FROM Tank temperature was 140 F SYSTEM LI D id SYSTEM N H lt NOT TO EXCEED 4 PIPE DIA OR l SYSTEM B yf A MAXIMUM OF 12 APART BALL VALVE CIRCULATOR Te T T HOT TYPICAL Y STRAINER WATER lt fe RECOMMENDED OUT ANTI SCALD MIXING VALVE t EXPANSION JN TANK A A BOILER BOILER BACKUP I CIRCULATOR HEAT EXCHANGER x COLD mi SDT MODELS ONLY WATER IN TEMPERATURE x W PRESSURE DRAIN POINT mr N RELIEF VALVE TYPICAL DOMESTIC HOT WATER BOILER CIRCULATOR TANK SENSOR V AQUASTAT SOLAR SENSOR RECIRCULATION UNION ee TYPICAL A lt TEMPERATURE er e CHECK VALVE GAUGE DRAIN KNIGHT BOILER SQUIRE DRAIN PRESSURE SOLAR FIELD SUPPLY RELIEF VALVE HEAT EXCHANGER NOTICE Please note that these illustrations are meant to show system piping concept only the installer is responsible for all equipment and detailing required by local codes Table 9D SDT Series Friction Loss FRICTION LOSS SDT SERIES 70 00 60 00 119 50 00 40 00 0652 30 00 a 20 00 10 00 0 00 27 Revision Notes Revision A ECO C05788 initial release Revision B ECO C05936 reflects th
3. N O N N N LA 45 000 _ jami N is ne SR Bag i N LD Vi N CH CH VS vI O N VE LA VE N A LA A 94 000 205 154 211 N LA vi SN ON N vi vi N VS oo N ox 135 000 N N 190 000 260 000 475 351 Boiler Heating Capacity LA 373 000 A N vi Oo LI 467 000 A N vi LA LI LA N N 217372 MAX BTU INPUT 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 SDT119 s Jjsjsjrejsj js s jerej so rr v2 nr Oe EEEE E ER zouh eck k T epee A T festo E EEEEEE 4 ON vI Koch LI ji A afekte OE EE EE SDE OC a EE BS 235 175 260 211 295 218 i 40 180 260 195 286 213 306227 f 541 257 385 288 413 308 431 320 e o e E e O Oe Oe DO a EE CCEA Note Testing conducted with 50 F inlet cold water 23 gt fei e Fei Q o e bei Q on E Ce Gi VY as VY aa Sau uire SDT SET Installation amp Operation Manual DY Indirect Water Heater 8 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
4. SENSOR 1 MPT C Me 7 a 1 1 2 MPT e Ges 1 1 2 MPT 5 iW Stainless Steel Indirect Water Heater Squire 2 Pre installation 1 The installation must conform to the instructions in this manual and all applicable local state provincial and national codes laws regulations and ordinances Installations in Canada must conform to B149 2 Installation Code 2 Be certain the domestic water supply to the tank has physical and chemical characteristics that fall within the limits shown in Table 2A Where questions exist as to the composition of the water on the job a qualified water treatment expert should be consulted CAUTION Water with characteristics outside the limits shown in Table 2A may severely shorten the life of the tank due to corrosion Damage to tanks in such cases is not covered under warranty 3 Read and understand all installation requirements in this manual Table 2A Water Chemistry Requirements Water used in the tank must have characteristics falling within the following limits ce Chloride PPM Figure 2 1 Element Cover Clearances 24 MIN CLEARANCE FROM ELEMENT COVER SET Models SDT SET Installation amp Operation Manual Locating the Tank 1 Choose a location for your water heater centralized to the piping system You must also locate
5. capacity directly connected to a drain Refer to local codes subject to freezing SDT SET065 080 119 3 4 NPT with a minimum CSA Rating of 200 000 Btu hr Notice Ly Lochinvar SDT SET series water heaters will absorb store less than 200 000 Btu hr when domestic water outlet temperature is 210 F and boiler water supply temperature is 240 F Listed outputs are based on ASME Section VIII Interpretation VIII 1 86 136 Check with local codes for applicability Do not install any valve between the T amp P relief valve and the tank connection or on the T amp P relief valve discharge piping Improper placement and piping of T amp P relief valve can cause severe personal injury death or substantial property damage A WARNING The T amp P relief valve is not intended for constant duty such as relief of pressure due A CAUTION Table 4A Minimum Relief Valve CSA Rating SDT SET065 200 000 SDT SET080 200 000 SDT SET119 200 000 14 to repeated normal system expansion Correct this condition by installing a properly sized expansion tank in a domestic water system Refer to the expansion tank manufacturer s installation instructions for proper sizing Failure to install and maintain a new listed A WARNING 3 4 X 3 4 temperature and pressure relief valve will release the manufacturer from any claim which might result from excessive temperature and pressures Squire Stainless Steet Indirect Water Heater SD
6. with water turn on the power to heater The heater is now operational Thermostat Adjustment The thermostat is located in the front of the heater The access cover must be removed to adjust to the factory default setting of 120 F This temperature is satisfactory for the average household use 1 Turn off power to the heater 2 Remove access cover and insulation Do not remove the thermostat protective cover 3 Set temperature indicator to desired temperature then replace insulation and access cover 4 Turn on power to heater Combination Thermostat and High Limit Control ECO This heater is equipped with a combination thermostat and high limit safety If for any reason the water temperature becomes eccessively high the High Limit Control ECO breaks the circuit to the heating element Once the switch opens it must be reset manually NOTICE The cause of the over temperature condition must be corrected first To reset press the red button as shown in FIG 5 1 Replace the insulation and access cover before turning on power to the heater Squire Installation amp Operation Manual Stainless Steel Indirect Water Heater 5 Wiring continued Table 5A Wiring SET065 SET119 SET Wiring Single Element 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 25 AMP DPDT 12 ga THHW SET119 240 VAC
7. 1 Ph 4500 18 3 25 AMP DPDT 12 ga THHW Rated for 90 C Figure 5 2 Combination Thermostat and High Limit Control SET 065 SET119 gt ex Ca S l i S SERVICE amp i GROUND SCREW E FIELD F SUPPLIED RD zg zz gt e e dle ee i rm ee rm rm rn LINE a 7 amp VOLTAGE 8 A gt FACTORY INSTALLED GROUND SE HIGH LIMIT THERMOSTAT SS GC ELEMENT 17 Squire Stainless Steel Indirect Water Heater 5 Wiring SDT SET Installation amp Operation Manual Indirect Water Heater Sensor Setup Knight Boiler A CAUTION Label all wires prior to disconnection when servicing controls Wiring errors can cause improper and dangerous operation NOTICE The sensor supplied contains an Auto Reset High Limit 194 F Install tank sensor The tank sensor is a dual sensor which controls the temperature of the tank from the boiler see FIG 5 3 The tank sensor has a built in high temperature limit set at 194 F 1 Install the sensor inside the tank as depicted in FIG 5 3 2 Connect the wire leads to the DHW Tank Sensor AUX connection point on the Knight boiler connection board see FIG 5 3 3 The Knight boiler will automatically read the sensor and default the tank temperature setting to 125 F 4 Adjust the tank set point program Reference the Knight Installation and Operation Manual for a detailed explanation of the tank se
8. ATER IN TEMPERATURE PRESSURE RELIEF VALVE BOILER TANK SENSOR AQUASTAT SOLAR SENSOR CHECK VALVE TEMPERATURE PRESSURE GAUGE d TYPICAL 7 FROM SOLAR D TO SOLAR nL UNION Ur RECIRCULATION TYPICAL ey PUMP TEMPERATURE DRAIN KNIGHT ge e GER Mana PRESSURE GAUGE pressure BOILER SOLA SQUIRE SQUIRE Re RELIEF VALVE HEAT oe EXCHANGER FILED SUPPLIED TYPICAL NOTICE Please note that these illustrations are meant to show system piping concept only the installer is responsible for all equipment and detailing required by local codes 11 Squire Stainless Steel Indirect Water Heater 4 Domestic Side Tank Piping Basic Domestic Piping Figure 4 2 on page 15 shows typical domestic water piping for a tank The function of the components shown are as follows a Shut off valves recommended Used to isolate the tank for servicing b Backflow Preventer required by some codes Used to prevent water from backing out of the tank and into the main potable water supply in the event that inlet water pressure drops c Expansion Tank required for thermal expansion his expansion tank absorbs the increased volume caused by heating water Use an expansion tank designed for use on domestic water systems Refer to the expansion tank manufacturer s literature for the proper size expansion tank to use NOTICE When an expansion tank is used do not put any valves between the expansion tank and tank inlet d
9. CHANGER SDT MODELS ONLY if O pr if Al zs 7 i UNION a a TYPICAL w l TEMPERATURE PRESSURE Fa GAUGE S SS DRAIN PRESSURE SETI RELIEF VALVE SOLUTION BOILER GAS SUPPLY SOLAR HEAT EXCHANGER NOTICE ZONE ZONE ZONE 2 3 4 IEN HE GE ZE ENER ZONE VALVES TYPICAL DIFFERENTIAL PRESSURE BYPASS VALVE IF USED HOT WATER OUT ANTI SCALD MIXING VALVE COLD WATER pra T IN TEMPERATURE PRESSURE RELIEF VALVE BOILER TANK SENSOR AQUASTAT SOLAR SENSOR CHECK VALVE TEMPERATURE PRESSURE GAUGE dh TYPICAL FROM SOLAR WW TO SOLAR TTTTYY YY lt RECIRCULATION PUMP SQUIRE CHECK VALVE DRAIN FIELD SUPPLY AUXILIARY CATCH PAN Please note that these illustrations are meant to show system piping concept only the installer is responsible for all equipment and detailing required by local codes NOTICE Please note that the installer is responsible for ensuring DHW prioritization when piped as a zone Squire SDT SET Installation amp Operation Manual Stainless Ki Indirect Water Heater 3 Boiler Side Piping SDT models Figure 3 3 Knight Boiler Primary Secondary Piping PRESSURE BACKFLOW REDUCING VALVE PREVENTER A PRESSURE P GAUGE ele IR NINI i i IT P MAKE UP WATER SYSTEM SUPPLY NSOR SEPARATOR r TO SYSTEM e e D T bie FROM SS NOT TO EXCEED4 PIPE DIA OR SYSTEM HOT
10. ERATURE ADJUSTMENT ZONE CONTROL BOX OR ZONE VALVE WIRE P OR CONNECTIONS S ZONE CIRCULATOR BOILER AQUASTAT CONTROL HI SOLAR SENSOR FIELD SUPPLIED TU INDIRECT TANK 19 Squire Stainless Steel Indirect Water Heater 6 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 Ge further Leakage from the boiler piping can result in severe damage to the boiler 2 Many soldering fluxes contain Zinc Chloride which can cause severe corrosion damage to stainless steel After completing all domestic water connections flush the indirect water heater thoroughly before leaving the installation This is particularly important if the indirect water heater will be unused for an extended period of time after installation Flush the indirect water heater by drawing at least three times its volume from the tank 3 Make sure that all electrical connections are made correctly and that no exposed high voltage wiring is present 4 Make sure that each zone valve or circulator operates when and only when its thermostat calls for heat Let each zone operate long enough to purge any remaining air from the system 5 Set the indirect water heater to the desired temperature Because hot water presents a scald hazard it is best to set the thermostat at 120 F or lower and raise it only if necessary to provide adequate hot wat
11. SDT SET I O Rev C Squire Stainless SCH Vudinect Water Heater installation amp Operation Manual Models SDT SETO65 119 eo Ze e E weer w CAUTION The heat transfer Gr medium must be water or other C nontoxic fluid having a toxicity d E rating or class of 1 as listed in i Clinical Toxicology of Commercial Products 5th edition k OH P Wen waz The pressure of the heat transfer v S medium must be limited to a maximum of 30 PSIG by an lt approved safety or relief valve w gt e wee M SS a Se Wee oe tr C SDT SET Solar Dual Coil Tank Solar Electric Tank A warnine his manual must only be used by 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 4 or substantial property damage Save this manual for future reference High Efficiency Water Heaters Boilers and Pool Heaters HAZARD DEFINITIONS 2 PLEASE READ BEFORE PROCEEDING 3 1 GENERAL INFORMATION Operating Restrictions 0 00 0 e eee ees 4 Single Wall Heat Exchanger 4 2 PRE INSTALLATION LOCATING ING Tank i dnart EE 5 Recommended Clearances 000 e eee 5 3 BOILER SIDE PIPING SDT MODELS Zone with Circulator to Aquastat 6 Zone with Valve to Aquastat 6 DAW P
12. T SET Installation amp Operation Manual 4 Domestic Side Tank Piping neg Figure 4 2 Recommended Domestic Water Piping SDT SET models FROM BOILER TO BOILER SDT MODELS ONLY NOTE UPPER COIL REPLACED WITH ELEMENT ON SET MODELS SHOCK ARRESTOR UNION TYPICAL i ANTI SCALD MIXING VALVE FROM SOLAR rm CHECK VALVE TO SOLAR l TEMPERATURE PRESSURE DRAIN GAUGE TYPICAL SOLAR HEAT EXCHANGER NOTICE SHUTOFF VALVE O aa SHUTOFF SE VALVE ap Ifi OA er SHUTOFF VALVE BACKFLOW PREVENTOR EXPANSION BOILER TANK TANK SENSOR AQUASTAT BOILER BACKUP HEAT EXCHANGER SDT MODELS ONLY SOLAR SENSOR RECIRCULATION PUMP CHECK VALVE DRAIN FIELD SUPPLY Please note that these illustrations are meant to show system piping concept only the installer is responsible for all equipment and detailing required by local codes 15 Squire SDT SET Installation amp Operation Manual Stainless Steel Mudireet Water Heater 5 wiring Electrical Connection Squire solar water heater with electric back up only SET models only A WARNING Tank must be full before unit is turned on The heating element will be damaged if energized for even a short period of time while tank is dry A CAUTION Be sure to ground the water heater The preferred way to ground is to use rigid metal conduit between the main panel and the water heater junction box with approved end fittings T
13. Unions recommended Used to disconnect the tank in the unlikely event that this is necessary e Drain required Used to drain the tank for inspection or servicing Multiple Tank Domestic Water Piping The two pipe reverse return piping uses more pipe than the two pipe direct return piping but the flow is more balanced and even in the two pipe reverse return piping layout see FIG 3 4 Each tank must have its own T amp P valve It is recommended that each tank be equipped with its own isolation valves unions and drains so that one tank may be removed from the system If local codes require a backflow preventer check with the appropriate authority to find out whether one backflow preventer may be used for tanks or each tank must be equipped with its own backflow preventer If each tank must have its own backflow preventer each tank must also have its own expansion tank If a common backflow preventer is permitted an expansion tank must be sized to accommodate the expansion volume of all tanks 12 SDT SET Installation amp Operation Manual Domestic Water Piping for Distant Fixtures In some cases the furthest fixture may be quite distant from the tank Such an installation would result in an unacceptable delay before hot water reaches these distant fixtures Even if all the fixtures are relatively close to the tank the building owner may want hot water at all fixtures as soon as they are opened To prevent delays ret
14. age NOTICE When calling or writing about the appliance Indirect water heater operation Please have the indirect water heater model e Should overheating occur or gas supply fail to shut off do not turn off or disconnect electrical supply to circulator Instead shut off the gas supply at a location Consider piping and installation when external to the appliance determining appliance location and serial number from the indirect water heater rating plate e Do not use this appliance if any part has been under water The possible damage to a flooded appliance can be extensive and present numerous safety hazards Any appliance that has been under water must be replaced Any claims for damage or shortage in shipment must be filed immediately against the transportation company by the consignee Factory warranty shipped with appliance does not apply to appliances improperly installed or improperly operated The following chart details the relationship of water temperature and time with regard to scald injury and may be used as a guide in determining the safest water temperature for A WARNING If the information in this manual is not your applications followed exactly a fire or explosion may EE EE Gamers Ee APPROXIMATE TIME TEMPERATURE ee a RELATIONSHIPS IN SCALDS This appliance MUST NOT be installed in 120 F More than 5 minutes any location where gasoline or flammable vapors are likely to be present 125 F 1 1 2
15. arge capacity not less than shown in Table 4A page 14 Install the combination temperature and pressure relief valve into the opening provided and marked for this purpose on the water heater 13 Squire SDT SET Installation amp Operation Manual tacnless Steel Indirect Water Heater 4 Domestic Side Tank Piping combination Standard Installation NOTICE Verify that the temperature and pressure relief valve complies with local codes If the e Install the T amp P relief valve in the connection marked ae Relief Valve combination temperature and pressure relief valve does not comply with local T amp P Relief Valve Discharge Piping codes replace it with one that does Follow the installation instructions in this section T amp P relief valve discharge piping must be made of material serviceable for a temperature of 250 F or greater directed so that hot water flows away from all persons directed to a suitable place for disposal installed so as to allow complete draining of the T amp P relief valve and discharge line terminated within 6 of the floor Do not place a valve between the combination temperature and pressure relief valve and the tank Determine T amp P relief valve size by the following specifications unless they conflict with local codes T amp P relief valve discharge piping must not be excessively long Using more than two 2 elbows or 15 feet of piping can reduce discharge
16. at and the size of the burner The Indirect Water Heater and Boiler sizing charts can be found on pages 23 and 24 Locate your Indirect Water Heater and Boiler along with your required First Hour Rating This will also determine the flow needed between the Indirect Water Heater and Boiler NOTICE The charts utilize only the upper boiler coil and the upper half of the tank 22 ire SDT SET Installation amp Operation Manual Stainless Steel Indirect Water Heater 8 Performance Data continued Table 8C First Hour Rating 180 F Boiler Loop Water Knight and Wall Mount Boilers Upper Coil SDT Models First Hour Rating 180 F Boiler Loop Water Knight Boiler SDTO65 SDT119 SDT065 SDT080 SDT119 Circulator Flow Domestic Outlet 115 140 140 115 140 140 115 140 115 et E 115 138 72 000 169 129 169 129 150 195 314 S 1 190 B pes 314 237 ESP EE E CC ES fsf EE sfs as E 255 208 301 222 E a 260 306 227 ln 385 413 308 RAGE d SEE pee el 90256 106525 116697 130105 139966 90257 106525 116698 130105 139967 123218 148780 171607 185675 Note Testing conducted with 50 F inlet cold water 3 gt _ LD Koch VS kech j vi n LD VS LD 3 Koch I VS vI VS LD Koch VS LD gt n LD N
17. drain valve by turning the knob clockwise 2 Open the cold water supply shutoff valve 3 Open several hot water faucets to allow air to escape from the system 4 When a steady stream of water flows from the faucets the water heater is filled Close the faucets and check for water leaks at the water heater drain valve combination temperature and pressure relief valve and the hot and cold water connections A WARNING Water from opened drain valves unions and other connections may be extremely hot To avoid severe personal injury death or substantial property damage Tighten all drain hose connections Direct hot water away from all persons To Drain the Water Heater Should it become necessary to completely drain the water heater be sure to follow the steps below 1 Disconnect the power supply to the heat source Consult the plumbing professional or electric company in your area for service 2 Close the cold water supply shutoff valve 3 Open the drain valve on the water heater 4 Open a hot water faucet to allow air to enter the system Drain the water heater if it will be shut off and exposed to freezing temperatures Freezing water will expand and damage the water heater If boiler water contains sufficient antifreeze then only the domestic water needs to be drained If boiler does not contain sufficient antifreeze the boiler water and the domestic water must be drained water If antifreeze
18. e 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 vy o o Revision C ECO C06300 reflects the update of tank images el OC ar and additional CSA cautions on manual cover Connect tank e sensor section added to Wiring section on page 18 and 300 Maddox Simpson Parkway ae i Lebanon TN 37090 tank temperature statement with correction of piping diagram 615 889 8900 Fax 615 547 1000 headers and table 9A and 9C on pages 26 and 27 www Lochinvar com SDT SET I O Rev C 8 10 Printed in U S A
19. e some hot water A WARNING Before operating a T amp P relief valve make sure no one is in front of or around the T amp P relief valve discharge piping Hot discharge water can cause severe personal injury or substantial property damage Move operating lever to open position for a few seconds and then move it back allowing it to snap closed After the T amp P relief valve is operated if it continues to release water close the cold water inlet to the water heater immediately Follow the draining instructions and replace the T amp P relief valve If the T amp P relief valve weeps periodically it may be due to thermal expansion Do not plug the T amp P relief valve or discharge piping A DANGER Plugging the T amp P relief valve or discharge piping can cause excessive pressure in the water heater resulting in severe personal injury death or substantial property damage Q Follow instructions on circulator to oil if required LJ Check mixing valve valves pipes and fittings for leaks LI Check function of the field installed controls and valves See component manufacturer s instructions LJ Review homeowner s maintenance responsibilities and their frequencies including any not listed in the following section Homeowner monthly maintenance to include LI Visually check valves pipes and fittings for leaks Call a qualified service technician to repair leaks To Fill the Water Heater 1 Close the water heater
20. els or to important information concerning the life of the product A DANGER injury DANGER indicates an imminently hazardous situation which if not avoided will result in death or serious A WARNING WARNING indicates a potentially hazardous situation which if not avoided could result in death or serious injury CAUTION indicates a potentially hazardous situation which if not avoided may result in minor or moderate A CAUTION a CAUTION avoided may result in property damage NOTICE CAUTION used without the safety alert symbol indicates a potentially hazardous situation which if not NOTICE indicates special instructions on installation operation or maintenance that are important but not related to personal injury or property damage Squire SDT SET Installation amp Operation Manual Stainless Steel Indirect Water Please read before proceeding A WARNING Installer Read all instructions before A WARNING Failure to adhere to the guidelines on this installing Perform steps in the order given page can result in severe personal injury Have this indirect water heater death or substantial property damage serviced inspected by a qualified service When servicing the indirect water heater technician at least annually Failure to comply with the above could result e To avoid severe burns allow the appliance to cool in severe personal injury death or substantial before performing maintenance property dam
21. er 6 Re enable the burner and allow the boiler to operate Make sure that the boiler shuts down when the indirect water heater is satisfied 20 SDT SET Installation amp Operation Manual Squire Stainless Steel Indirect Water Heater SDT SET Installation amp Operation Manual d Maintenance The Lochinvar SDT SET series indirect water heater is an extremely simple device and as such requires very little maintenance There are however several items which should be checked out on an annual or as needed basis to ensure a reliable supply of hot water Make sure that the rest of the solar boiler and domestic water piping is free of leaks If there is an oil lubricated circulator in the system make sure it is lubricated as called for by the circulator manufacturer Make sure that the boiler is maintained in accordance with the boiler manufacturer s instructions If a water treatment system is required to keep the water chemistry within the parameters shown in Table 2A see Section 2 Pre Installation make sure that this system is properly maintained Maintenance Schedule Annual service by a qualified service technician should include the following Q Any procedure required by local codes LI Verify system pressure Air venting procedure may require adding water to bring boiler system up to pressure typically 12 psig Q Manually operate T amp P relief valve at least once a year This will releas
22. f the systems potable water system Operating Restrictions 3 The equipment is permanently labeled to indicate that only additives recognized as safe by the FDA shall be used in the heat transfer medium Maximum domestic hot water temperature is 194 F Maximum boiler water temperature is 210 F e Maximum working pressure for the vessel tank is Other heat exchanger designs may be permitted where 150 psig approved by the Administrative Authority Table 1A Component Materials 316L Steel Stainless Steel 304L Stainless Steel Figure 1 1 Lochinvar SDT and SET Series Indirect Water Heaters 1 RELIEF VALVE CONNECTION A B CO p EP p G 2 HOT WATER OUTLET H ny oe 3 BOILER WATER IN SDT065 35 16 91 8 27 15 16 33 5 8 47 3 16 52 5 16 59 7 8 N A 24 4 BOILER WATER OUT rE os L t 5 DRAIN COLD WATER INLET _SDT119 ELORE 11 16 37 7 16 54 1 2 60 1 8 N A 28 EE 3 5 16 27 15 16 N A N A ea SETS Sene 938 Brie Na Na 60718 6s ane sore 28 125 a hoo 0 fo K SOLAR ELECTRIC SOLAR DUAL COIL 1 1 2 FPT 2 1 1 2 FPT 2 i 3 4 FPT 1 I 3 4 FPT 4 AQUASTAT WELL T O ewer 1 MPSF 8 MPT j 4 een V oe 1 MPT 6 1 MPT 6 is G Sg ap J Se L Se gu SOLAR SENSOR SOLAR
23. he separate ground wire connection provided in the water heater junction box must also be grounded Replace the junction box cover and insulation after you have made all wiring connections The 4500 watt heating element in the Squire SET is wired to the junction box on top of the heater and it requires 240 volt A C electrical service The voltage requirement and wattage load for the heater is also specified on the heater identification plate A 1 2 E M T opening located on top of the unit is provided for a field wiring connection Consult an electrician to determine if your electrical service is adequate for the additional load of the heater The electrical installation should be done by a qualified licensed electrician All wiring must conform to the National Electric Code and local codes The manufacturer s warranty does not cover any damage or defect caused by the installation attachment or use of any type of unapproved devices into onto or in conjunction with this water heater The use of unauthorized energy saving devices may shorten the life of the water heater and may endanger life and property The manufacturer disclaims any responsibility for such loss or injury resulting from the use of such unauthorized devices Figure 5 1 Thermostat RESET BUTTON THERMOSTAT PROTECTIVE THERMOSTAT COVER DIAL POINTER 16 After the water and electrical connection have been made and the tank has been filled
24. hr SDT065 119 SDT065 SDT080 SDT119 Domestic Outlet als peal opel ohooh 140 so orf a Se Cem feefee CCC r feiet EE CEN REC mICOooo Err EDIE sf eo ee e FEEF EE EE e GEES Goo rapa af Gaas 265 369 ES 279f J 339 339 258 367 279 D 284 E SE SEE EEE EEE CEE SE MAX BTU INPUT 121786 153207 168199 176783 188081 121786 153207 168199 176783 188081 162144 202222 231672 253492 Note Testing conducted with 50 F inlet cold water LI A A VM a Se 245 279 CO gt N A 21 LA 475 362 E e p LA ei Q ei O on e d ei Y T Y E G 30 403 542 412 602 456 VS CO N LA N N vI 291792 24 Squire Stainless Steel Indirect Water P 9 High Output Piping High Domestic Hot Water Usage When a large amount of hot water is required by a Domestic Hot Water system the dual coil indirect water heater can be piped together when given the high volume needed to satisfy the high load demands This is achieved by piping the boiler coil and solar coil together This will enable heat transfer to both the heat exchangers at the same time This is done by series piping or piping in parallel A decision must be made to choose a particular system based on the heating coil pressure drop and the desired flows This type of piping can be done in a solar operation as well as with a boiler to acheive
25. in valves may be extremely hot To avoid injury Make sure all connections are tight Direct water flow away from any person Protection Must Be Taken Against Excessive Temperature and Pressure Installation of a Temperature amp Pressure T amp P relief valve is required Squire SDT SET Installation amp Operation Manual Stainless Steel Indirect Water Heater d General Information The Lochinvar SDT SET series indirect water heater Single Wall Heat Exchanger FIG 1 1 is designed to generate domestic hot water in conjunction with a solar panel using forced circulation with a Uniform Plumbing Code backup heat source This indirect water heater consists of a Single wall heat exchangers are permitted if they satisfy all of 316L Stainless Steel tank in which a smooth 304L stainless the following requirements steel coil is located Table 1A Solar heating fluid is pumped a l through the coil and heats the water in the tank If the solar 1 The heat transfer medium is potable water or contains only substances which are recognized as safe by the U S Food panel cannot produce enough heat the backup source should Wer and Drug Administration supply hot water This tank is not intended for use in pool heating applications or for heating any fluid other than water 2 The pressure of the heat transfer medium is maintained less It is also not intended for use in gravity hot water heating than the normal minimum operating pressure o
26. ires less energy 25 Squire SDT SET Installation amp Operation Manual squire 9 High Output Piping Figure 9 1 Indirect Boiler with Series Piping Table 9A Parallel Configuration PRESSURE Boiler Boiler BACKFLOW REDUCING VALVE Flow Loop PREVENTER A PRESSURE PS GAUGE Ll NN f i AIR SENSOR SEPARATOR r TO o L t FROM Tank temperature was 140 F SYSTEM S Lem NOT TO EXCEED 4 PIPE DIA OR SYSTEM TYPICAL CIRCULATOR VETRANER HOT fe RECOMMENDED WATER ANTI SCALD OUT EXPANSION Vv BOILER Bee MIXING VALVE TANK CIRCULATOR I HOT WATER d COLD mA CIRCULATOR rp WATER L IN O Els wi K O TEMPERATURE DRAIN POINT V gt H PRESSURE TYPICAL RELIEF VALVE BOILER BACKUP ge HEAT EXCHANGER ANK ENCOR l SDT MODELS ONLY AOUASTAT E SOLAR SENSOR RECIRCULATION UNION PUMP TYPICAL A TEMPERATURE PRESSURE GAUGE DRAIN KNIGHT CHECK VALVE BOILER SOLAR SQUIRE PRESSURE HEAT EXCHANGER DRAIN RELIEF VALVE FIELD SUPPLY NOTICE Please note that these illustrations are meant to show system piping concept only the installer is responsible for all equipment and detailing required by local codes Table 9B SDT Parallel Friction Loss FRICTION LOSS SDT PARALLEL 80 00 70 00 60 00 50 00 40 00 30 00 20 00 10 00 119 FT HD 065 amp 080 0 00 FLOW 26 Squire SDT SET Installation amp Operation Manual squire Q High Output Piping Continue
27. is used in the boiler water check concentration Boiler water including additives must be practically non toxic having a toxicity rating or class of 1 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 A WARNING Do not use automotive ethylene glycol or petroleum based antifreeze Do not use any undiluted antifreeze This can cause severe personal injury death or substantial property damage 21 Squire SDT SET Installation amp Operation Manual Ce Ee Water Heater 8 Performance Data Table 8A SET Backup Recovery Performance Heat Exchanger Heated Recovery First Draw Volume Water Back Up Gallons Model Gallons Volume Minutes ow Table 8B SDT Backup Recovery Performance Heat Exchanger Heated Recovery T Volume Water Back Up Mode Gallons Nee Minutes Recovery Boiler First Draw Output for Gallons spross_ 19 2 2 s s sw a sproso La 22 s 9 s sw s s SDT119 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 The FHR is the amount of hot water in gallons the water heater can supply in the first hour of operation starting with a tank full of hot water The FHR is dependent on tank capacity source of he
28. lt Ge RECOMMENDED WATER LSC DUT XING VALVE EXPANSI t EE A BOILER DOMESTIC CIRCULATOR HOT WATER can A CIRCULATOR sar WATER TEMPERATURE DRAIN POINT gt D TYPICAL den es PRESSURE RELIEF VALVE BOILER BACKUP BOILER HEAT EXCHANGER TANK SENSOR SDT MODELS ONLY O AQUASTAT SOLAR SENSOR CHECK VALVE TEMPERATURE PRESSURE GAUGE TYPICAL g s WW e FROM SOLAR A TO SOLAR UNION TYPICAL a r q TEMPERATURE RECIRCULATION PRESSURE e PUMP GAUGE DRAIN Saal SOLAR SQUIRE CHECK VALVE R PRESSURE HEAT EXCHANGER DRAIN RELIEF VALVE FIELD SUPPLY NOTICE Please note that these illustrations are meant to show system piping concept only the installer is responsible for all equipment and detailing required by local codes E 40 Squire SDT SET Installation amp Operation Manual Stainless Ki Indirect Water Heater 3 Boiler Side Piping SDT models continued Figure 3 4 Multiple Tank Connections PRESSURE REDUCING VALVE e E PRESSURE PREVENTER a ei GAUGE MAKE UP LP NN il im WATER AIR SEPARATOR SYSTEM SUPPLY SENSOR ei bh TO gp Lef H vn FROM SYSTEM SYSTEM SS EE NOT TO EXCEED 4 PIPE DIA OR BALL VALVE SYSTEM ECR A A MAXIMUM OF 12 APART CIRCULATOR T T HOT TYPICAL RS Y STRAINER WATER RECOMMENDED SYSTEN F OUT CIRCULATOR gm BOILER DOMESTIC Se e Woorcitston stares ae CIRCULATOR Lef ft DRAIN POINT TYPICAL COLD W
29. n property damage or personal injury Recommended Clearances The installation location must provide adequate clearances for servicing and proper operation of the water heater A 12 inch vertical clearance is recommended from the top of the water heater A zero clearance is allowed for the sides of the water heater However boiler electrical and servicing clearances must be figured when locating the water heater Minimum Clearance to the Element Cover See FIG 2 1 Clearances must be a minimum of 24 inches to allow for element removal and replacement on SET model Squire Stainless Ki Indirect Water SDT SET Installation amp Operation Manual 3 Boiler Side Piping SDT models Figures 3 1 thru 3 4 show typical boiler side piping for several common situations Regardless of which system is used it is imperative that the flow rates called for in Table 3C are developed through the coil This requires properly sized piping and a properly sized pump The system shown in FIG s 3 1 thru 3 4 are described below Zone with Circulator to Aquastat This system is like the circulator zone system on a straight heat job except that one of the zones goes to the tank instead of radiation As on any circulator zone system check valves should be installed in each zone to prevent unwanted circulation through zones which are not calling for heat Figure 3 1 on page 8 illustrates typical circulator zone piping Zone with Valve to Aquastat A
30. placed in the same manifold For this reason it is best not to mix tanks of different sizes in the same zone if their recovery is critical Squire SDT SET Installation amp Operation Manual Stainless Sg Iudinect Water Heater 3 Boiler Side Piping SDT models continued Table 3A Pressure Drop Chart SDT SET065 080 Table 3B Pressure Drop Chart SDT SET119 Table 3A Table 3B Pressure Drop Chart SDT SET065 080 Pressure Drop Chart SDT SET119 SDT SETO65 080 FRICTION LOSS SDT SET119 FRICTION LOSS 10 00 Eii 12 00 SOLAR COIL 8 00 10 00 7 J BOILER BOILER Be COIL COIL 8 00 SZ 6 00 2 T 6 00 4 00 4 00 2 00 7 00 0 00 0 5 8 12 16 20 5 8 12 16 20 GPM GPM Table 3C Pressure Drop Values SDT SET065 119 Table 3C Pressure Drop Values PRESSURE DROP PRESSURE DROP SOLAR COIL BOILER COIL MODELI COIL FT HD FT HD 12 5 8 12 16 GPM Ee Geng GPM GPM GPM GPM Ba SET065 SET080 SET119 Squire SDT SET Installation amp Operation Manual Stainless KC Indirect Water Heater 3 Boiler Side Piping SDT models Figure 3 1 Piping Diagram Zoned with Circulators PRESSURE PRESSURE REDUCING VALVE GAUGE BACKFLOW CA PREVENTER O Gei wi ZONE CIRCULATORS MAKE UP AOADA O Ch TYPICAL WATER SYSTEM SUPPLY SENSOR WHEN USED AIR SEPARATOR rr Q EXPANSION TANK IE l HOT NOT TO EXCEED 4 PIPE DIA WATER DRAIN POINT OR A MAXIMUM OF 12 APART UT ANTI SCALD TYPICAL MIXING VALVE J 9 COLD y
31. rioritization 1 0420 2x eve hse eee a eA on ee See 6 Multiple Tank Connections Boiler Side 6 Table 3A 3B Pressure Drop Charts 7 Table 3C Pressure Drop Values 7 PIPING KS let e EE 8 11 4 DOMESTIC SIDE TANK PIPING Basic Domestic Piping 0 0 cee eee 11 Multiple Tank Domestic Water Piping 11 Domestic Water Piping for Distant Fixtures 11 Anti scald Valves Mixing Valves 12 Install Drain Valve 12 Temperature and Pressure T amp P Relief Valve 12 Table 4A Minimum Relief Valve AGA Rating 13 5 WIRING Electrical Connection and Thermostat Setup 16 Indirect Water Heater Sensor Setup Knight Boiler 18 Install and Connect Tank Sensor 18 Indirect Water Heater Controlled Using Aquastat and Zone CO CUAL Oo EE 19 6 START UP AND CHECK OUT 20 7 MAINTENANCE Maintenance Schedule 21 To Fill the Water Heater 2005 21 To Drain the Water Heater 045 21 8 PERFORMANCE DATA Performance Data Charts 0000 eee 22 24 9 High Output Piping High Domestic Hot Water Usage 25 Senes PIPING 24 035 44a a e D 25 26 Parallel PIDIN EE EE 25 27 REVISION NOTES Hazard definitions The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk lev
32. s with the circulator zone system this system is just like a standard heating zone system except that one of the zones is connected to the tank coil as shown in FIG 3 2 on page 9 The system circulator must be large enough to move boiler water through the coil regardless of the flow rate required through the heating zones DHW Prioritization This piping system is designed to provide direct hot water priority over the other zones in the heating system When there is a Domestic Hot Water DHW call for heat the Knight control will shut off the boiler circulator and activate the domestic hot water circulator Once the DHW demand is satisfied the boiler circulator will be readjusted as demand requires The circulator must be large enough to move the boiler water through the coil in the tank and it must meet the minimum boiler flow requirments The recommended piping for a DHW priority system is depicted in FIG 3 3 on page 10 Multiple Tank Connections Boiler Side Multiple tank installations must be done in the reverse return manner The reason for this is to create the same pressure drop 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 3B Because the pressure drop through tank coils varies from size to size it is hard to predict the flow rate that will be developed through each coil when two tanks of different sizes are
33. t point program Connect tank sensor L Turn OFF the power to the unit Use wire strippers to strip one inch of insulation from the ends of each wire that will be spliced Splice the two ends of bare wire by twisting them together with a pair of electrical pliers Turn the pliers three or four times to make a sufficient connection Attach a wire nut at the point where the two wires have been twisted together Twist the wire nut until it fits snugly or until it cannot be twisted any more Wrap the wire nut and the two wires with electrical tape to secure the connection Cover any exposed wiring with electrical tape Figure 5 3 Indirect Water Heater Controlled Using Tank Sensor DHW TANK SENSOR AUTO RESET HIGH LIMIT PLACE SENSOR IN TANK BULBWELL amp SNAP CLIP OVER BULBWELL peppers TTT INDIRECT TANK E 18 SOLAR SENSOR FIELD SUPPLIED d Jet SENSOR KNIGHT LOW VOLTAGE TERMINAL STRIP Squire SDT SET Installation amp Operation Manual Stainless Steel Indirect Water Heater 5 Wirin H continued Indirect Water Heater Controlled Using Aquastat and Zone Circulator Valve l Install Aquastat to tank Aquastat control TST20016 can be ordered from your local Lochinvar distributor 2 Connect Aquastat to the zone controller for the Indirect Water Heater Zone oF Adjust Aquastat to the desired temperature Figure 5 4 Wiring for Zone Control TST20016 po TEMP
34. the SDT SET water heater where it will not be exposed to freezing temperatures Additionally you will need to place the water heater so that the controls drain and inlet outlets are easily accessible This appliance must not be installed outdoors as it is certified as an indoor appliance and must also be kept vertical on a level surface 2 Keep distance between boiler and water heater to a minimum to a reduce piping heat loss b provide minimal friction loss 3 Figure 1 1 on page 4 shows the weights of all the tanks filled with water Make sure that the location chosen for the tank is capable of supporting it This appliance must be placed where leakage from the relief valve leakage from the related piping or leakage from the tank or connections will not result in damage to the surrounding areas or to the lower floors of the building A water heater should always 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 4 The tank may be located some distance from the boiler provided the pump is designed to provide the flow called for in Table 3B page 7 Pressure Drop Values through the coil The further the tank is from the boiler the longer the response of the boiler will be to a call from the tank zone Insulate piping between the boiler and the tank A WARNING Failure to properly support the tank could result i
35. this maximum heat transfer into the water Series Piping With this style of installation the solar boiler supply piping is connected to boiler water IN connection When joining in this operation all fittings must be no smaller than one inch in size Then the boiler water OUT and the solar water IN are connected This will join the boiler and soiler coils together The return water is piped from the solar return to the solar boiler supply See FIG 9 1 on page 26 For tank operation use the lower RONCE bulbwell to turn the tank on and off SDT SET Installation amp Operation Manual Parallel Piping With this style of installation both heat exchanger are used at the same time Solar boiler supply piping to the solar water IN and boiler coils will be at the same temperature at the same time Then the boiler return and the solar return are piped together again to return the water to the heat source See FIG 9 2 on page 27 For tank operation use the lower bulbwell to turn the tank on and off The two pipe reverse return hydronic loop is more balanced and even than the two pipe direct return hydronic loop Both heat exchangers receive the same temperature of water so it is the same as the two pipe return but with more advantages One advantage over the two pipe system is a balanced flow of the reverse return system This system can have a lower pressure drop for both heat exchangers than the two pipe system and it also requ
36. to 2 minutes WHAT TO DO IF YOU SMELL GAS 130 F About 30 seconds Do not try to light any appliance 135 F About 10 seconds e Do not touch any electric switch do not 140 E WEE use any phone in your building e Immediately call your gas supplier from a 145 F Less than 3 seconds neighbor s phone Follow the gas supplier s 150 F About 1 1 2 seconds instructions If you cannot reach your gas supplier call 1595F About 1 second the fire department Installation and service must be performed by a qualified installer service agency or the gas supplier Hot Water Can Scald Water heated to temperatures for clothes washing dish washing and other sanitizing needs can A DANGER scald and cause permanent injury Children elderly and infirm or a handicapped persons are more likely to be permanently injured by hot water Never leave them unattended in a bathtub or shower Never allow small children to use a hot water tap or draw their own bath If anyone using hot water in the building fits the above description or if state laws or local codes require certain water temperatures at hot water taps you must take special precautions Use lowest possible temperature setting Install some type of tempering device such as an automatic mixin valve at hot water tap or water heater Automatic mixing valve must be selected an installed according to valve manufacturer s recommendations and instructions Water passing out of dra
37. urn circulation piping with a check valve that allows flow to the inlet of the tank This should be installed on each branch circuit at the farthest fixture or device so that hot water is supplied upon demand Because hot water is always circulating in the hot water branch the entire branch should be insulated to prevent excessive heat loss Squire Stainless Steel Indirect Water Heater SDT SET Installation amp Operation Manual 4 Domestic Side Tank Piping continue Anti scald Valves Mixing Valves Anti scald valves used with water heaters are also called tempering valves or mixing valves An anti scald valve mixes cold water in with the outgoing hot water to assure that hot water reaching a building fixture is at a temperature low enough to be safe ASSE1017 and ASSE1070 certified valves are recommended Usually the maximum temperature of the outlet water will stay near the setting of the tank 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 This device blends a controlled amount of cold water with the hot water leaving the tank so that water at a more constant temperature exits the mixing valve Anti scald mixing valve piping is illustrated in FIG s 3 1 thru 3 4 A WARNING An anti scald mixing
38. valve does not eliminate the risk of scalding Set the tank thermostat as low as practical Feel water before bathing or showering If anti scald or anti chill protection is required use devices specifically designed for such service Install these devices in accordance with their manufacturer s instructions Install Drain Valve Drain valve and fittings are supplied by others Standard Installation e Install a tee connection at the domestic cold water inlet FIG 4 1 Figure 4 1 Drain Valve Installed Temperature amp Pressure T amp P Relief Valve A WARNING For protection against excessive temperatures and pressure install temperature and pressure protective equipment required by local codes but not less than a combination temperature and pressure relief valve certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment or materials as meeting the requirements for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems ANSI Z21 22 and the Standard CAN1 4 4 Temperature Pressure Temperature and Pressure Relief Valves and Vacuum Relief Valves The combination temperature and pressure relief valve shall be marked with a maximum set pressure not to exceed the maximum working pressure of the water heater The combination temperature and pressure relief valve shall also have an hourly rated temperature steam BTU disch
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