Instruction/ maintenance manual of the product M-2-50T6DS Bradford-White Corp
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Save this manual for future reference Manual 238-47104-00A SERVICE MANUAL Troubleshooting Guide and Instructions for Service (To be performed ONLY by qua lified servi ce providers) Models Covered by This Manual: Residential Energy Saver: M1& M2(HE) UprightModels.
Table of Con ten ts Page Serv ic e Proced ure Introduction …………………………………………… …………………………. 2 Tools………………………………………….
GENERAL INFORMATION 120 VOLT Ungro unded Grounded (Neutra l ) Grou nding BLACK WHI TE GRE EN 120 0 120 240 VOL T Ungroun ded Ungr ou nd ed Gr ounding BLACK RE D GRE EN 240 120 120 120 ABC N eutral RED.
GENERAL INFORMATION Watt age Limitat ions at Vari ous Voltage s Resid ential E lectric Upright M1 & M2 Series ( Non-Sim ultan eous opera tion) M ax im um Wat ta ge E lement Uppe r/Lo wer Volta g e.
GENERAL INFORMATION Surf ace M oun t Com binat ion Ther most at/ ECO (high limit) 89T Ser ies Ma nual E CO (high limit ) R es et bu tton Tem per at ure con trol D ia l Tem per at ure c ontr ol Dial S .
SEQU ENCE OF OP ERATIO N R esiden tial and l ight duty commercial electric w at er heat ers a r e des igned to o perate usin g several different o perating m odes . The common m odes and seq uence of o perati on are as follows : 1 . Singl e Element O peration.
Non-Simul taneous and Simul taneous O peration Doub le element el ectric water heater s are de signed to operate in a Non-Simultan eous or Sim ultaneous mod e. Non-Simulta neous Mode: All ows only on e heating element to operate at a time. For exam ple, when the tank is cold, the upp er element is energi zed first, heating th e top of the tank .
SEQU ENCE OF OP ERATIO N Sequence o f Operatio n- Double E leme n t, Simultaneous Ope ration, Single Phase, 4 wire service installation. A 4 wire, dou ble elem ent heater w ired for simult aneous o perati on is es sentiall y two singl e elemen t systems o perating i ndepe ndently.
SEQU ENCE OF OP ERATIO N Sequence o f Operatio n- Double Element, Non-Simultaneous Operation, 3 Phase. Line v oltage is appl ied acros s terminals L 1 & L3 of up per thermos tat. Likewise, Li ne voltag e is appl ied to terminal L3 of low er thermos tat.
SEQU ENCE OF OP ERATIO N Line vol tage is a pplied ac ross term inals L1 & L3 of uppe r thermostat . Line vol tage als o extends t o term inal L1 of low er thermostat.
SEQU ENCE OF OP ERATIO N Sequence o f Operatio n- Dou ble Eleme n t, Non-Simu ltaneous Operatio n, Single P hase, Off Peak. Some el ectric uti lity compan ies will o ffer disco unts for using electrici ty during “ Off Peak” Ti mes of the day .
TROUBLESHOOTING Most common ca use for improper el ectric water heate r op eration can be linked to heating el ement failure. When trou bleshooti ng an electric w ater heater with the incidenc e of .
SYM PTOM PR OBA BLE CA US E COR RECTIVE ACTI ON No Hot Water 1 . No Po we r to hea ter. 2 . Lo ose wire c onne cti ons. 3 . Inope rativ e uppe r heat ing el ement . 4 . Inope rativ e uppe r the rmost at. 5. O pen ECO. 1. In opera tive lo wer he ati ng elem ent.
SERVICE PROCEDU RE RE- I Line Voltage & High Limit (ECO) Testin g WARNING High vo ltage exposure. Use cau tion when making voltag e checks to avoid personal injury. Line Voltage T esting Illustration 2 Il lus tra tio n 3 1. Turn “O FF” power t o water heater .
SERVICE PROCEDURE RE-II Heating Element Testing Step 1. TURN O FF POWER T O W ATER HEAT ER. Step 2. Remove acc e ss cover(s) from front of w a ter heater . Remove insulation an d plasti c cover f rom the rmostat. Step 3. Dis connect w i res from hea ting element.
SERVICE PROCEDURE RE -III Residential Thermostat Testing WARNING High voltage exp osure. Use cau t ion t o av oid per so nal inj ury du rin g t his pr oce dur e. Ill us tra ti on 6 Singl e Element Operation or Double Element, 4 Wire, Simultan eous, Sin gle Phase Operation.
WARNING High voltage exp osure. Use cautio n t o avoid pers onal injury du ring this proced ure. Double Element, Non-Simultaneous, Single Phase Operation. Water In Tank Is Cold With Pow er O N . 1. This procedure assumes lin e voltage, E CO and elements are in worki ng ord er.
Doubl e Ele ment, N on - Sim ultaneous, Single Pha se Operation (continued). Not Enough H ot Water (continued). 7. Check voltage acro ss termin al L4 of up per thermost at and termi nal 1 of l ow e r thermosta t (see ill ustration 11). A) Rate d voltage N O T present, - check wire connec tion between thermosta ts.
WARNING High voltage exp osure. Use cautio n t o avoid pers onal injury du ring this proced ure. Double Element, Non-Simultaneous, Three Phase Operation. Water In Tank Is Cold With Pow er O N . 1 . This procedure assumes lin e voltage, EC O an d elements are in worki ng ord er.
Double Element, Non-Simultaneous, Three Phase Operation ( c ontinued). Tank D oes Not Deliver En ough Hot Water (contin ued) 7. Ch eck voltage across te rminal L1 & L3 of lower thermos tat (see il lustration 16) . A) Rated voltage N O T present, check wire connecti on between th ermostats.
Double Element, Simultaneous, Three Phas e Operation. Water In Tank Is Cold Or Not Enough Hot Water With Pow e r ON. 1. This pr ocedur e ass umes lin e voltage , ECO and ele m ents are in w orking order . 2 . A djust tem perature set ting for both thermosta ts to the h ighest setting .
Double Element, Simultaneous, Three Phas e Operation (c ontinued). Water Temperature In Tank Is A b ove Thermostat Setting. 1. This procedure assumes Lin e voltage , ECO and elements are in worki ng ord er. 2. Adjus t upper and low er thermostat to the lowest settin g .
Double Element, Non-Simultaneous, Single Phase, Off Peak Oper ation. W ater In Tank Is Cold With Pow er ON. 1. This pr ocedur e ass umes lin e voltage , ECO and ele m ents are in w orking order . 2 . Turn p ow e r “O N” to w a te r heater. 3. Set mu lti-meter to “Volts AC ”.
WARNING High voltage exp osure. Use cautio n t o avoid pers onal injury du ring this proced ure. Double Element, Non-Simultaneous, Single Phase, O ff Peak Opera tion. (continued) N ot Enough H ot Water (continued). 7. Check voltage across te rminal T4 o f upper thermosta t & T2 of lower The rmo s tat.
SERVICE PROCEDU RE RE -IV Light Duty C o m m ercial The rmos tat Testing WARNING High voltage exp osure. Use cautio n t o avoid pers onal injury du ring this proced ure. D ouble Element, Non-Simultaneous, Single Phase O peration. W ater In Tank Is Cold With Pow er ON.
WARNING High voltage exp osure. Use cautio n t o avoid pers onal injury du ring this proced ure. Double Element, Non-Simultaneous, S ingle Phase Operation (continued) T ank D oes Not Deliver En ough Hot Water (continued). 7. Ch eck voltage across te rminal L3 of up per thermosta t & T2 of lower The rmostat.
WARNING High voltage exp osure. Use cautio n t o avoid pers onal injury du ring this proced ure. Double Element, Simultaneous, Single Pha se Operation. Water In Tank Is Cold Or Not Enough Hot Water With Pow e r ON. 1. This pr ocedur e ass umes lin e voltage , ECO and ele m ents are in w orking order .
WARNING High voltage exp osure. Use cautio n t o avoid pers onal injury du ring this proced ure. Double Element, Simultaneous, Single Pha se Operation (c ontinued) Water Temperature In Tank Is A b ove Thermostat Setting. 1. This procedure assumes lin e voltage, E CO and elements are in worki ng ord er.
WARNING High voltage exp osure. Use cautio n t o avoid pers onal injury du ring this proced ure. Double Element, Non-Simultaneous, Three Phase Operation. W ater In Tank Is Cold With Pow er ON. 1. This procedure assumes lin e voltage, E CO and elements are in worki ng ord er.
WARNING High voltage exp osure. Use cautio n t o avoid pers onal injury du ring this proced ure. Double Element, Non-Simultaneous, Three Phase Operation ( c ontinued). Tank D oes Not Deliver En ough Hot Water (continued). 7. Ch eck voltage across te rminal L1 of up per thermosta t & T2 of lower The rmostat.
WARNING High voltage exp osure. Use cautio n t o avoid pers onal injury du ring this proced ure. Illu stration 47 Illu stration 48 Double Element, Simultaneous, Three Phas e Operation. Water In Tank Is Cold Or Not Enough Hot Water With Pow e r ON. 1. This pr ocedur e ass umes lin e voltage , ECO and elem ents are i n worki ng order .
S ERVICE PROCEDU RE RE -IV Light Duty C o m m ercial The rmos tat Testing WARNING High voltage exp osure. Use cautio n t o avoid pers onal injury du ring this proced ure. Double Element, Simultaneous, Three Phas e Operation (c ontinued). Water Temperature In Tank Is A b ove Thermostat Setting.
SERVICE PROCEDURE RE -V Ther mostat Removal an d Rep lacement Fr ont View Th ermos tat Moun ting The r m ostat Re moval 1. Turn p ow e r “OFF” To water he ater. 2 . Re m ov e access c over a nd insul ation. 3. Re m ov e plasti c the rmostat protecto r from th ermo s tat.
SERVICE PROCEDU RE RE -VI Heating Element Removal and Repla cement Heating Elem en t Removal 1. Turn p ow e r “OFF” To water he ater. 2 . T urn off col d wate r supp ly to heat er. Con nec t hose to d rain spi got of w at er hea ter an d rout e to an o pen d rai n.
Page 35 S tep 1. Turn p ower “OF F” to wat er hea ter. Step 2 . T urn of f cold wate r suppl y t o heat er. Con nect hos e to dra in spigo t of wat er hea ter and ro ute to an o pen dr ain. Op en a near by hot wat er fau cet to ven t heat er for dra ining .
Page 36 Ge neric Part s List 1. T&P Relie f V alve 2. He at Tr ap I nsert (Out let ) 3. Hot Wa ter O utl et/ Anod e 4. Cover C ond uit /Grou nd 5. Junc tion B ox C over 6. Heat T rap In sert ( Inl et) 7. Cold Wate r I nlet Dip Tube 8. Ther most at Prot ecto r (La rge ) 9.
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If you already are a holder of Bradford-White Corp M-2-50T6DS, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Bradford-White Corp M-2-50T6DS.
However, one of the most important roles played by the user manual is to help in solving problems with Bradford-White Corp M-2-50T6DS. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bradford-White Corp M-2-50T6DS along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
