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Installation & Operation Manual

Please read before proceeding

Installer – 

Read all instructions before 

installing.  Perform steps in the order given.

Have this indirect water heater serviced/
inspected by a qualified service technician, at 
least annually.

Failure to comply with the above could result 
in severe personal injury, death or substantial 
property damage.

Failure to adhere to the guidelines on this 
page can result in severe personal injury, 
death, or substantial property damage.

When servicing the indirect water heater –

• To avoid severe burns, allow the appliance to cool 
  before performing maintenance.

Indirect water heater operation –

• 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 
  external to the appliance.

• 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.

When calling or writing about the appliance 
– Please have the indirect water heater model 
and serial number from the indirect water 
heater rating plate.

Consider piping and installation when 
determining appliance location.

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.

If the information in this manual is not 
followed exactly, a fire or explosion may 
result causing property damage, personal 
injury or loss of life.

This appliance MUST NOT be installed in 
any location where gasoline or flammable 
vapors are likely to be present.

WHAT TO DO IF YOU SMELL GAS

•  Do not try to light any appliance.
• Do not touch any electric switch; do not 
  use any phone in your building.
• Immediately call your gas supplier from a 
  neighbor’s phone.  Follow the gas supplier’s 
 instructions.
• If you cannot reach your gas supplier, call 
  the fire department.

 WARNING

 NOTICE

 WARNING

 WARNING

3

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 your 
applications.

APPROXIMATE TIME / TEMPERATURE 

RELATIONSHIPS IN SCALDS

120°F

More than 5 minutes

125°F

1 1/2 to 2 minutes

130°F

About 30 seconds

135°F

About 10 seconds

140°F

Less than 5 seconds

145°F

Less than 3 seconds

150°F

About 1 1/2 seconds

155°F

About 1 second

•  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 

 

scald and cause permanent injury.

• 

Children, elderly, and infirm or physically 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 mixing 

 

 

 

valve, at hot water tap or water heater.  Automatic mixing valve must be selected and 

 

 

 

installed according to valve manufacturer’s recommendations and instructions.

• 

Water passing out of drain 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 & Pressure (T&P) relief valve is required.

Summary of Contents for SQUIRE SIT030

Page 1: ...d result in severe personal injury death or substantial property damage WARNING Save this manual for future reference SIT I O Rev H CAUTION The heat transfer medium must be water or other nontoxic flu...

Page 2: ...EFORE PROCEEDING 3 1 GENERAL INFORMATION Operating Restrictions 4 Single Wall Heat Exchanger 4 2 PRE INSTALLATION Locating the Tank 5 Recommended Clearances 5 3 BOILER SIDE PIPING Zone with Circulator...

Page 3: ...AS Do not try to light any appliance Do not touch any electric switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instruc...

Page 4: ...PT SEE NOTE 1 2 SIT030 SIT119 PART NO A in B in C in D in E in F in SIT030 SIT040 SIT050 SIT065 SIT080 SIT119 3 1 16 3 1 16 3 5 8 3 5 16 3 5 16 3 5 16 8 3 16 8 3 16 9 1 8 9 1 8 9 1 8 9 3 8 21 3 4 25 1...

Page 5: ...or 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 6: ...s 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 straig...

Page 7: ...EXCEED 4 PIPE DIA OR A MAXIMUM OF 12 APART TANK SENSOR AQUASTAT RELIEF VALVE Y STRAINER DRAIN FIELD SUPPLY HOT WATER OUT ANTI SCALD MIXING VALVE RECIRCULATION PUMP CHECK VALVE DRAIN ZONE 1 ZONE 2 ZONE...

Page 8: ...D SYSTEM CIRCULATOR SYSTEM SUPPLY SENSOR WHEN USED NOT TO EXCEED 4 PIPE DIA OR A MAXIMUM OF 12 APART TANK SENSOR AQUASTAT RELIEF VALVE Y STRAINER DRAIN FIELD SUPPLY RECIRCULATION PUMP CHECK VALVE DRAI...

Page 9: ...IN POINT TYPICAL MAKE UP WATER FROM SYSTEM BOILER CIRCULATOR SYSTEM CIRCULATOR TO SYSTEM SYSTEM SUPPLY SENSOR DRAIN DRAIN FIELD SUPPLY RECIRCULATION PUMP TANK SENSOR AQUASTAT Y STRAINER RECOMMENDED HO...

Page 10: ...RELIEF VALVE TYPICAL TANK SENSOR AQUASTAT TYPICAL CHECK VALVE SQUIRE SQUIRE BACKFLOW PREVENTER PRESSURE REDUCING VALVE PRESSURE GAUGE AIR SEPARATOR EXPANSION TANK BALL VALVE TYPICAL MAKE UP WATER FROM...

Page 11: ...reverse return piping layout see FIG 3 4 Each tank must have its own T P valve It is recommended that each tank be equipped with its own isolation valves unions and drains so that one tank may be rem...

Page 12: ...sed 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...

Page 13: ...of piping can reduce discharge capacity directly connected to a drain Refer to local codes subject to freezing WARNING Do not install any valve between the T P relief valve and the tank connection or...

Page 14: ...VALVE SHUT OFF VALVE ANTI SCALD MIXING VALVE DRAIN FIELD SUPPLY RECIRCULATION PUMP TO BOILER FROM BOILER CHECK VALVE TANK SENSOR AQUASTAT SQUIRE Figure 4 2 Recommended Domestic Water Piping Please not...

Page 15: ...sensor has a built in high temperature limit set at 194 F NOTICE The sensor supplied contains an Auto Reset High Limit 194 F 3 The Knight boiler will automatically read the sensor and default the tank...

Page 16: ...ntrol TST20016 can be ordered from your local Lochinvar distributor 2 Connect Aquastat to the zone controller for the Indirect Water Heater Zone 3 Adjust Aquastat to the desired temperature INDIRECT T...

Page 17: ...xtended 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 th...

Page 18: ...s 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 c...

Page 19: ...IT030 27 0 1 1 1 5 160 183 99 000 14 0 3 9 SIT040 40 0 1 6 0 9 181 208 115 000 14 0 4 5 SIT050 51 6 1 7 0 8 209 255 133 000 14 0 5 3 SIT065 67 0 1 9 0 7 263 327 154 000 14 0 5 7 SIT080 81 5 2 1 0 6 26...

Page 20: ...Hour Rating of no less than 165 gallons Fixture Count Guide 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...

Page 21: ...9574 132764 94115 114116 125111 134044 146207 Boiler Heating Capacity Table 8B First Hour Rating 180 F Boiler Loop Water Knight Boiler First Hour Rating 180 F Boiler Loop Water Knight Boiler SIT065 SI...

Page 22: ...ler Heating Capacity First Hour Rating 180 F Boiler Loop Water Universal Sizing 45 000 295 000 Btu hr Model SIT065 SIT080 SIT119 Circulator Flow GPM 5 8 12 16 20 5 8 12 16 20 5 8 12 16 20 Domestic Out...

Page 23: ...Heating Capacity First Hour Rating 200 F Boiler Loop Water Universal Sizing 45 000 295 000 Model SIT065 SIT080 SIT119 Circulator Flow GPM 5 8 12 16 20 5 8 12 16 20 5 8 12 16 20 Domestic Outlet 115 14...

Page 24: ...for section 3 Boiler Side Piping FIG 3 1 3 4 a new image for section 4 Domestic Side Tank Piping FIG 4 2 and the update of the Pressure Drop chart on page 6 Revision E ECO C06035 reflects the update o...

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