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safe InstallatIon, use and serVIce

Your safety and the safety of others is extremely important in the installation, use, and servicing of this boiler.

Many safety-related messages and instructions have been provided in this manual and on your own boiler to warn you and others of 

a potential injury hazard.  Read and obey all safety messages and instructions throughout this manual.  It is very important that the 

meaning of each safety message is understood by you and others who install, use, or service this boiler.

This is the safety alert symbol. It is used to alert 

you to potential personal injury hazards. Obey all 

safety messages that follow this symbol to avoid 

possible injury or death.

 

danGer

danGer indicates an imminently hazardous 

situation which, if not avoided, will result in 

death or injury.

 

warnInG

warnInG  indicates  a  potentially  hazardous 

situation which, if not avoided, could result in 

death or injury.

 

cautIon

cautIon    indicates  a  potentially  hazardous 

situation which, if not avoided, could result in 

minor or moderate injury.

cautIon

cautIon used without the safety alert symbol 

indicates  a  potentially  hazardous  situation 

which, if not avoided, could result in property 

damage.

all  safety  messages  will  generally  tell  you  about  the  type  of  hazard,  what  can  happen  if  you  do  not  follow  the  safety 

message, and how to avoid the risk of injury.

the  california  safe  drinking  water  and  toxic  enforcement act  requires  the  Governor  of  california  to  publish  a  list  of 

substances  known  to  the  state  of  california  to  cause  cancer,  birth  defects,  or  other  reproductive  harm,  and  requires 

businesses to warn of potential exposure to such substances.

this product contains a chemical known to the state of california to cause cancer, birth defects, or other reproductive 

harm. this appliance can cause low level exposure to some of the substances listed.

IMportant defInItIons

•  

  Qualified Installer or Service Agency:

 

Installation and service of this boiler requires ability equivalent to that of a Qualified Agency (as defined by ANSI below) in the field 

involved. Installation skills such as plumbing and electrical supply are required in addition to electrical testing skills when performing 

service.

•  

  ANSI Z223.1 2006 Sec. 3.3.83:

 

 

“Qualified Agency” - “Any individual, firm, corporation or company that either in person or through a representative is engaged in and is 

responsible for (a) the installation, testing or replacement of gas piping or (b) the connection, installation, testing, repair or servicing of 

appliances and equipment; that is experienced in such work; that is familiar with all precautions required; and that has complied with all 

the requirements of the authority having jurisdiction.”

Содержание NW 37-670

Страница 1: ...ep for future reference COMMERCIAL ELECTRIC BOILERS Thank you for buying this energy efficient boiler from us We appreciate your confidence in our products MODELS NW 37 670 INSTALLATION OPERATION SERV...

Страница 2: ...the type of hazard what can happen if you do not follow the safety message and how to avoid the risk of injury The California Safe Drinking Water and Toxic Enforcement Act requires the Governor of Ca...

Страница 3: ...ay also cause erratic control system operation on ELECTRONIC CONTROL models This boiler must be connected to a grounded metal permanent wiring system or an equipment grounding conductor must be run wi...

Страница 4: ...hen standing in water When replacing fuses always use the correct size for the circuit See page 12 through 14 The principal components of the heater are identified on page 8 The model and rating plate...

Страница 5: ...4 4 4 3 3 3 3 1 1 1 1 NW NW NW NW NW 96 96 96 96 96 330K 390K 420K 450K 480K 36 36 36 36 36 38 38 38 38 38 16 16 16 16 16 69 1 2 69 1 2 69 1 2 69 1 2 69 1 2 17 17 17 17 17 1 1 2 1 1 2 1 1 2 1 1 2 1 1...

Страница 6: ...1800K 1860K 1980K 2100K 66 66 66 66 56 56 56 56 28 28 28 28 90 1 2 90 1 2 90 1 2 90 1 2 25 1 2 25 1 2 25 1 2 25 1 2 2 1 2 2 1 2 2 1 2 2 1 2 30 30 30 30 33 33 33 33 7 3 4 7 3 4 7 3 4 7 3 4 8 8 8 8 2 2...

Страница 7: ...60 2 90 4 90 6 60 1501 1668 1299 1443 648 720 792 864 542 602 663 723 NW NW NW NW NW NW NW 220 220 220 220 220 220 220 780K 840K 900K 960K 1020K 1080K 1140K 2 662 140 2 866 920 3 071 700 3 276 480 3 4...

Страница 8: ...8 FEATURES AND COMPONENTS ACTUAL CONFIGURATION MAY VARY...

Страница 9: ...the area adjacent to the boiler or to lower floors of the structure 3 The discharge opening of the temperature and pressure relief valve should always be piped to an open drain 4 Close to the point o...

Страница 10: ...ut being certain the boiler is filled with water and a properly sized pressure relief valve is installed in the relief valve opening provided The pressure rating of the relief valve should be equal to...

Страница 11: ...ng increase in water pressure due to thermal expansion Thermal expansion can cause premature tank failure leakage This type of failure is not covered under the limited warranty Thermal expansion can a...

Страница 12: ...th this computation the next higher standard rating or setting should be selected Boiler Circuits The boiler s electrical components are pictured and identified on page 8 The model and rating plate il...

Страница 13: ...TH THERMOSTAT NOTE S 1 IF A MANUAL RESET HLMT IS USED THE SECOND AUTO RESET HLMT SWITCH IS NOT USED STD WIRING OPTIONAL OR FIELD WIRING AS REQ D NOTE S 1 IF A MANUAL RESET HLMT IS USED THE SECOND AUTO...

Страница 14: ...ON LIGHT 1 OFF ON 2200 2 OFF ON 135 3 OFF ON 4 20MA 4 OFF ON 0 10VDC 5 DS PROP 6 PROG UN 7 OFF VER 8 SEC MN 1 DELAY 1 2 DELAY 2 3 DELAY 3 4 1 5 2 6 4 7 5 8 16 THE ABOVE DIP SWITCH SETTINGS ARE AN EXAM...

Страница 15: ...y be in the control circuit in addition to the automatic high limit previously described The control has an adjustable range of 110 F to 290 F and activates and locks on a temperature increase When th...

Страница 16: ...proximate time to burn relationship for normal adult skin Water Temperature Time to Produce 2nd 3rd Degree Burns on Adult Skin 180 F 82 C 160 F 82 C 150 F 82 C 140 F 82 C 130 F 82 C 120 F 82 C 80 F 82...

Страница 17: ...dential pipe dope thread cutting oil solder flux dirt and other foreign materials breakdown to form gas This is indicated by a continuing need for purging even through the system is closed 2 Pump seal...

Страница 18: ...switch serving the boiler is in the ON position The pilot switch es on the cabinet front should be on In some installations the boiler electrical service may be limited by the power company or boiler...

Страница 19: ...ges for forwarding the new tank or replacement part from the nearest distributor and returning the claimed defective tank or part to such distributor c All cost necessary or incidental for any materia...

Страница 20: ...A DIVISION OF A O SMITH CORPORATION RENTON WASHINGTON Technical Support 800 527 1953 Parts Department 800 433 2515 www hotwater com...

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