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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.
Installation & Operation
Manual
Models: SIT030 - SIT119
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.
SIT-I-O Rev G
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Table of Contents
Summary of Contents for Squire SIT030
- Page 1 SIT-I-O Rev G Installation & Operation Manual Models: SIT030 - SIT119 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.
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Page 2: Table Of Contents
Contents HAZARD DEFINITIONS ............ 2 Anti-scald Valves (Mixing Valves) ......12 PLEASE READ BEFORE PROCEEDING ......3 Install Drain Valve ............12 1. GENERAL INFORMATION Temperature and Pressure (T&P) Relief Valve ..12 Operating Restrictions ............4 Table 4A - Minimum Relief Valve (AGA Rating) ... 13 Single-Wall Heat Exchanger .......... -
Page 3: Please Read Before Proceeding
Installation & Operation Manual Please read before proceeding Installer – Read all instructions before • Installation and service must be performed by a qualified WARNING installing. Perform steps in the order given. installer, service agency, or the gas supplier. Have this indirect water heater serviced/ Failure to adhere to the guidelines on this WARNING inspected by a qualified service technician, at... -
Page 4: General Information
3. BOILER WATER IN 45° 4. BOILER WATER OUT 5. DRAIN/COLD WATER INLET 1” FPT (SEE NOTE 1) 2 3/4” FPT 1 1” MPT “E” “D” AQUASTAT/SENSOR WELL 1” MPT “C” 1” MPT (SEE NOTE 2) “B” “A” SIT030 - SIT119... -
Page 5: Pre-Installation
Installation & Operation Manual Pre-installation Locating the Tank The installation must conform to the instructions in this manual and all applicable local, state, provincial, and national codes, laws, regulations, and Choose a location for your water heater centralized to the ordinances. -
Page 6: Boiler Side Piping
Table 3A for heat. Figure 3-1 on page 7 illustrates typical circulator Pressure Drop Chart zone piping. Zone with Valve to Aquastat SIT030 - 119 FRICTION LOSS SIT030 - 119 FRICTION LOSS 12.00 12.00 SIT119, SIT119,... -
Page 7: Piping Diagrams
TEMPERATURE / PRESSURE RECIRCULATION GAUGE PUMP DRAIN CHECK VALVE SOLUTION SQUIRE PRESSURE DRAIN BOILER RELIEF VALVE ( FIELD SUPPLY ) 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 8 TEMPERATURE / PRESSURE CHECK VALVE GAUGE DRAIN DRAIN SOLUTION SQUIRE ( FIELD SUPPLY ) PRESSURE BOILER RELIEF VALVE 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 9 AQUASTAT CHECK VALVE UNION (TYPICAL) RECIRCULATION PUMP TEMPERATURE / KNIGHT DRAIN SQUIRE PRESSURE ( FIELD SUPPLY ) BOILER GAUGE DRAIN PRESSURE RELIEF VALVE 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 10 RECIRCULATION (TYPICAL) PUMP TEMPERATURE / CHECK VALVE DRAIN PRESSURE PRESSURE KNIGHT SQUIRE SQUIRE DRAIN GAUGE RELIEF VALVE BOILER ( FIELD SUPPLY ) Please note that these illustrations are meant to show system piping concept only, the installer is responsible NOTICE...
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Page 11: Domestic Side (Tank) Piping Basic Domestic Piping
Installation & Operation Manual Domestic Side (Tank) Piping Basic Domestic Piping Domestic Water Piping for Distant Fixtures Figure 4-2 on page 14 shows typical domestic water piping In some cases the furthest fixture may be quite distant for a tank. The function of the components shown are as from the tank. -
Page 12: Anti-Scald Valves (Mixing Valves)
Installation & Operation Manual Domestic Side (Tank) Piping 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. An anti-scald valve pressure protective equipment required by mixes cold water in with the outgoing hot water to assure local codes, but not less than a combination... - Page 13 - terminated within 6” of the floor. SIT030/040/050 - 3/4” NPT with a minimum CSA T&P relief valve discharge piping must not be: Rating of 105,000 Btu/hr. - excessively long. Using more than two (2) elbows or 15 feet of piping can reduce discharge capacity.
- Page 14 TANK TANK SENSOR/ AQUASTAT CHECK VALVE RECIRCULATION PUMP SQUIRE DRAIN ( FIELD SUPPLY) 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.
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Page 15: Wiring
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 sensor supplied contains an Auto Reset High Limit (194°F). NOTICE Install tank sensor Connect tank sensor... -
Page 16: Indirect Water Heater Controlled Using Aquastat And Zone Circulator
Installation & Operation Manual Wiring 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 17: Start-Up And Check-Out
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 18: Maintenance
Installation & Operation Manual Maintenance The Lochinvar SIT series indirect water heater is an extremely Homeowner monthly maintenance to include: simple device and as such requires very little maintenance. Visually check valves, pipes, and fittings for leaks. Call a There are, however, several items which should be checked qualified service technician to repair leaks. -
Page 19: Performance Data
Installation & Operation Manual Performance Data Table 8A IBR Chart Squire Indirect Water Heater I=B=R Rating Indirect Heat Minimum Heat Tank Heat Potable Minimum Water Source Standby Continuous First Hour Output Rate Source Water Heat Source Heater Water Heat Loss... -
Page 20: How To Properly Size Your Indirect Water Heater
To quickly estimate the minimum gallons of hot water required based on a family size number of baths and hot water appliances the First Hour Rating of the Squire must be equal to or exceed the total first hour requirements. - Page 21 Installation & Operation Manual Performance Data Table 8B First Hour Rating - 180°F Boiler Loop Water (Knight Boiler) First Hour Rating - 180°F Boiler Loop Water (Knight Boiler - Models SIT030 - SIT050) Model SIT030 SIT040 SIT050 Circulator Flow Domestic Outlet...
- Page 22 (continued) Table 8C First Hour Rating - 180°F Boiler Loop Water (Universal Sizing) First Hour Rating - 180°F Boiler Loop Water (Universal Sizing - 45,000 - 295,000 Btu/hr) Model SIT030 SIT040 SIT050 Circulator Flow Domestic Outlet 115 140 115 140 115 140 115 140 115 140 115 140 115 140 115 140 115 140 115 140 115 140 115 140 115 140 115 140 115 140...
- Page 23 Performance Data Table 8D First Hour Rating 200°F Boiler Loop Water (Universal Sizing) First Hour Rating - 200°F Boiler Loop Water (Universal Sizing - 45,000 - 295,000) Model SIT030 SIT040 SIT050 Circulator Flow Domestic Outlet 115 140 115 140 115 140 115 140 115 140 115 140 115 140 115 140 115 140 115 140 115 140 115 140 115 140 115 140 115 140...
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Page 24: Performance Data Charts
Revision Notes: Revision A (ECO C05265) initial release. Revision B (ECO C05399) reflects the addition of the Pressure Drop Chart and updates made to the Performance Data Charts. Revision C (ECO C05587) reflects the update of tables 3A and 3B (Pressure Drop charts) on page 6, table 4A on page 13, the update of the “Domestic water piping”...
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