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Lochinvar SQUIRE SDT/SET065 - 119 - page 1
Installa tion & Oper a tion Manual Models: SDT/SET065 - 119 T h i s m a n u a l m u s t o n l y b e u s e d b y a qualified heating installer / serv ice technician. R ead all instructions before installing. P erform steps in the order given. Failure t o comply could result in sever e personal injur y , death, or substantial property damage. ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 2
Hazar d definitions The following defined terms are used thr oughout this manual to bring attention to the presenc e of hazards of var ious risk level s or to important information concerning the life of the product. 2 DANGER W ARNING CAUTION CAUTION NOTICE D ANGER indicates an imminently hazardous situation which, if not av oided, will ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 3
SDT/SET Installation & Operation Manual Please r ead bef or e pr oceeding Installer – R ead all inst ructions before installing. P erform steps in the order giv en. Ha ve this indirect water heat er serv iced/inspected by a qualified service technician, at least annually . Failure t o comply with the above could r esult in severe personal inj ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 4
1 Gener al Infor ma tion The Lochin var SDT/SET ser ies indirect water heat er (FIG. 1-1) is desig ned to generate domestic hot water in conjunction with a solar panel using forced circulation with a backup heat source. This indirect water heat er consists of a 316L Stainless Steel tank in which a smooth 304L stainless steel co il is located (T abl ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 5
5 2 Pre-installation 1. The installation must conform t o the instructions in this manual and all applicable local, state, provincial, and national codes, la ws, r egulations, and ordinances. Installations in Canada must c onform to B149.2 Installation Code. 2. Be certain the domestic water supply to the tank has physical and c hemical char acteris ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 6
6 Multiple T ank Connections (Boiler Side) M ultiple tank installations must be done in the “r e verse-r etur n ” manner . The reason for this is to create the same pr essure drop (and therefore, the same flow) thr ough the coil of each tank. The boiler manifold piping must be sized so that each c oil has the flow rate called for in T able 3B. ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 7
7 SDT/SET Installation & Operation Manual SOLAR CO IL 0.00 2.00 4.00 8.00 SDT / SET065 - 080 FRICTION LOSS 10.00 BOILER COIL 6.00 HD FT/ SOLAR COIL BOILER COIL 0.00 2.00 4.00 6.00 8.00 10.00 5 8 12 16 20 FT/HD SDT / SET065 - 080 FRICTION LOSS GPM T able 3A Pressure Dr op Char t SDT/SET065-080 T able 3C Pressure Dr op V alues MODEL COIL CONN. (I ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 8
SDT/SET Installation & Operation Manual 8 SOLUTION BOILER SQUIRE COLD WAT ER IN TEMPERATURE / PRESSURE GAUGE AIR SEPARATO R BALL VALVE (TYPICAL) UNION (TYPICAL) PRESSURE RELIEF VALVE DRAIN PO INT (TYPICAL) MAK E UP WAT ER BOILER CIRCULAT OR BACKFLOW PREVENTER PRESSURE REDUCING VA LVE PRESSURE GAUGE EXPAN SION TANK ZONE #1 ZONE CIRCULA TORS (TYP ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 9
Installation & Operation Manual 9 SOLUTION BOILER SQUIRE COLD WA TER IN TEMPERATURE / PRESSURE GAUGE AIR SEPARATOR BALL VALVE (TYPICAL) UNION (TYPICAL) PRESSURE RELIEF VALVE DRAIN POINT (TYPICAL) MAK E UP WAT ER BOILER CIRCULATOR BACKFLOW PREVENTER PRESSURE REDUCING VALVE PRESSURE GAUGE EXPANSION TANK ZONE #1 ZONE #2 ZONE #3 ZONE #4 SYSTEM SUPP ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 10
SDT/SET Installation & Operation Manual 10 KNIGHT BOILER DOMESTIC HOT W ATER CIRCULA TOR BACKFLOW PREVENTER PRESSURE REDUCING V AL VE PRESSURE GAUGE ANTI-SCALD MIXING V AL VE COLD WA T E R IN TEMPERA TURE / PRESSURE GAUGE AIR SEP ARA TOR EXP ANSION TA N K BALL V AL VE (TYPICAL) UNION (TYPICAL) PRESSURE RELIEF V AL VE DRAIN POINT (TYPICAL) MAK E ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 11
SDT/SET Installation & Operation Manual 11 PRESSURE REDUCING V AL VE PRESSURE GAUGE BACKFLOW PREVENTER MAKE UP WA TER AIR SEP ARA TOR SYSTEM SUPPL Y SENSOR TO SYSTEM BALL V AL VE (TYPICAL) SYSTEM CIRCULA TOR SYSTEN CIRCULA TOR EXP ANSION TA N K DRAIN POINT (TYPICAL) UNION (TYPICAL) TEMPERA TURE/ PRESSURE GAUGE DRAIN PRESSURE RELIEF V AL VE KNIG ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 12
SDT/SET Installation & Operation Manual 12 4 Domestic Side (T ank) Piping Basic Domestic Piping Figure 4-2 on page 15 sho ws ty pical domestic water piping for a tank. The func tion of the components sho wn are as follows: a. Shut-off valves (rec ommended) - U sed to isolate the tank for serv icing. b. Backflow P reventer (requir e d by some c ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 13
SDT/SET Installation & Operation Manual 13 4 Domestic Side (T ank) Piping (continued) T emperature & Pressur e (T&P) Relief V alv e For pr otection against exc essiv e temperatures and pr essure, install temperature and pr essure prot ec tiv e equipment required b y local codes, but not less than a combination te mperature and pressure ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 14
SDT/SET Installation & Operation Manual 14 NOTICE V er ify that the combination temperature and pressur e relief valve complies with local codes. If the combination te mperature and pressure relief valve does not comply with local codes, replace it with one that does. Follo w the installation instr uctions in this section. NOTICE The Lochin var ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 15
SDT/SET Installation & Operation Manual 15 EXPAN SION TANK UNION (TYPICAL) SHOCK ARR ESTOR SHUTOFF VALVE SHUTOFF VALVE BACKFLOW PREVENTOR SHUTOFF VALVE SHUTOFF VALVE ANTI-SCALD MIX ING VALVE DRAIN ( FIELD SUPPL Y) RECIRCULATI ON PUMP TO BOILER FROM BOIL ER CHECK VALVE BOILER TANK SENSOR/ AQUASTAT SQUIRE TEMPERA TURE / PRESSURE GAUGE (TYPICAL) C ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 16
SDT/SET Installation & Operation Manual RESET BUT TON THERMOST A T DIAL POINTER T HERMOST A T PROTECTIVE COVER 16 5 W iring Electrical Connection (Squire solar wate r heater with electr ic back up only -- SET models only) Be sure to ground the wat er heater . The pr efer red way t o g round is to use rigid metal conduit between the main panel a ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 17
Installation & Operation Manual 5 W iring (continued) 17 Figure 5-2 Combination Thermostat and High Limit Control, SET 065-SET1 19 RD BK GR RD BK BK RD SERVICE GROUND SCREW GROUND SCREW HIGH LIMIT ELEMENT THERMOST A T LINE VOL T AGE FIELD SUPPLIED FA C T O R Y INST ALLED SET W ir ing (Single Element) Mo de l V olts / Phase W atts / AMPS Breaker ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 18
SDT/SET Installation & Operation Manual 18 5 W iring Indirect Water Hea ter Sensor Setup (Knight Boiler) Label all wires prior to disconnection when serv icing controls. W iring er rors can cause impr oper and dangerous operation. CAUTION 1. Install the sensor inside the tank as depicted in FIG. 5-3. 2. Connect the wire leads to the DHW T a ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 19
SDT/SET Installation & Operation Manual 19 5 W iring (continued) Indirect Water Hea ter Contr olled Using Aquastat and Zone Circulator / V alv e 1. Install Aquastat to tank. A quastat control (TST20016) can be ordered fr om your local Lochin var distributor . 2. Connect A quastat to the zone c ontroller for the Indirect W ate r Heat er Zone. 3. ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 20
SDT/SET Installation & Operation Manual 20 6 Star t-up and Check-out 1. Mak e sure the system is free of leaks and that air is purged from the system. CAUTION Fix any leaks found befor e proceeding further . Leakage fr om the boiler piping can result in sever e damage to the boiler . 2. Man y solder ing flux es contain Zinc Chloride which can c ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 21
SDT/SET Installation & Operation Manual 7 Maintenance * M ake sur e 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 sur e it is lubr icated as called for by the circulator man ufacturer . * M ake sur e that the boiler is maintained in acco rdance with ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 22
SDT/SET Installation & Operation Manual 22 8 P erfor mance Da ta T able 8B SDT Backup Recovery Performance How to Proper l y Size Y our Indir ect Water Hea ter U se the First Hour Rating (FHR) to pr operly size your I ndirect W ater H eater . The FHR is the amount of hot water in gallons the water heater can supply in the first hour of operatio ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 23
SDT/SET Installation & Operation Manual T able 8D First Hour Rating - 180°F Boiler Loop Water (Universal Sizing. Upper Coil SDT Models) First Hour Rating - 180°F Boiler Loop Wa ter (Univ er sal Sizing - 45,000 - 295,000 Btu/hr / SDT065-SDT119) Boiler Supply W ater 180 180 180 Circulat or Flow GPM 5 8 12 16 20 5 8 12 16 20 5 8 12 16 20 Domesti ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 24
SDT/SET Installation & Operation Manual T able 8E First Hour Rating 200°F Boiler Loop Water (Universal Sizing, Upper Coil SDT Models) First Hour Rating - 200°F Boiler Loop Wa ter (Univ er sal Sizing - 45,000 - 295,000 Btu/hr / SDT065-119) Boiler Supply W ater 200 200 200 Circulat or Flow GPM 5 8 12 16 20 5 8 12 16 20 5 8 12 16 20 Domestic Out ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 25
SDT/SET Installation & Operation Manual 25 9 High Output Piping High Domestic Hot Wa ter Usa ge W hen a large amount of hot water is requir ed by a Domestic Hot W ater system, the dual coil indir ect water heater can be piped together when give n the high volume needed to satisfy the high load demands. This is achiev ed by piping the boiler coi ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 26
SDT/SET Installation & Operation Manual 26 9 High Output Piping PRESSURE REDUCING V AL VE PRESSURE GAUGE BACKFLOW PREVENTER MAKE UP WA TER SYSTEM SUPPL Y SENSOR AIR SEP ARA TOR TO SYSTEM BALL V AL VE (TYPICAL) SYSTEM CIRCULA TOR EXP ANSION TA N K DRAIN POINT (TYPICAL) FROM SYSTEM COLD WA TER IN ANTI-SCALD MIXING V AL VE HOT WA TER OUT TEMPERA T ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 27
SDT/SET Installation & Operation Manual 27 9 High Output Piping (continued) BACKFLOW PREVENTER PRESSURE REDUCING VA LV E PRESSURE GAUGE MAKE UP WA TER SYSTEM SUPPL Y SENSOR AIR SEP ARA TOR TO SYSTEM FROM SYSTEM HOT WA TER OUT NOT T O EXCEED 4 PIPE DIA. OR A MAXIMUM OF 12” AP ART Y -STRAINER (RECOMMENDED) BOILER CIRCULA TOR BOILER BACKUP HEA T ...
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Lochinvar SQUIRE SDT/SET065 - 119 - page 28
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 t ank images and ad ...
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