Instruction/ maintenance manual of the product MHB24G Vulcan-Hart
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A produc t of VULCAN- HART LOUI SVI LLE , KY 40201- 0696 F24700 ( O ctober 2001) - NOT ICE - T hi s Man ual is p repared for t h e u s e o f trai ned Vul can S ervice Technic ians and s hould not be us ed by thos e not pr oper ly q u a li fi ed.
VHX SERIES STEAMERS F24700 ( O ctober 2001) Page 2 of 68 T A BLE OF CONTENT S G E N E R A L ............................................................................. 4 I n s t a l l a t i o n .......................................................
VHX SERIES STEAMERS F24700 ( O ctober 2001) Page 3 of 68 A i r P r e s s u r e S w i t c h A d j u s t m e n t ........................................................ 3 3 G a s P i l o t P r e s s u r e A d j u s t m e n t............................
VHX SERIES STEAMERS - GENERAL F24700 ( O ctober 2001) Page 4 of 68 GENE RA L INSTAL LA TION Ref er t o t he Instal l ati on and O per at i on M anual f or detai l ed i nstal l at i on i nstruc t i ons. MAINTENA NCE Ref er t o t he Instal l ati on and O per at i on M anual f or specif i c m ai nt enanc e i nstruc t i ons.
VHX SERIES STEAMERS - GENERAL F24700 ( O ctober 2001) Page 5 of 68 Boile r C ontrol Sty les VHX Steam er s m anuf act ur ed usi ng the ol d styl e boi l er c ont rol s ended on 5/19/00.
VHX SERIES STEAMERS - GENERAL F24700 ( O ctober 2001) Page 6 of 68 WAT ER CONDITIONING Fur ni shing t he boil er wi t h tr eat ed water to r educ e scale f or m at i on i s im por t ant. Scal e f or m at ion wi l l reduce steam out put, c ause prem at ure com ponent f ai l ure, and shorten equi pm ent l i f e.
VHX SERIES STEAMERS - GENERAL F24700 ( O ctober 2001) Page 7 of 68 Gas Supply MOD EL INP UT (BTU/ HR) M ANIFOLD PRESSURE (I NCHES W.C. ) PILO T PRESSURE (I NCHES W.C. ) LINE PRESSURE (I NCHES W.C. ) NATURAL PROPANE MAX IMU M ALLOWED NAT. PROP. NAT. PROP.
VHX SERIES STEAMERS - OPERATION F24700 ( O ctober 2001) Page 8 of 68 ST EA M ER OPERA T IO N CABINET BASE BOILER En su re th a t a ll utility c onnect i ons to t he steam er hav e been m ade and ar e t urned O N and t hat t he knob on the m ai n gas v al v e i s i n t he ON posi t i on.
VHX SERIES STEAMERS - OPERATION F24700 ( O ctober 2001) Page 9 of 68 1. W i t h both t im er k nobs at t he of f posit i on, open the com par t m ent door s and observ e t hat no steam has entered t he c ook i ng com par t m ents, then cl ose the doors.
VHX SERIE S S T EAM E RS - COMP O NENT F UNCTI ON F24700 ( O ctober 2001) Page 10 of 68 COMPONENT FUNCTION CABI NET BASE BOILER CONT ROLS Power Switch (ON /OFF) ......... W hen turned O N, suppl ies power to t he c ont rol ci rcui t . Reset Sw itch (Man ual ) .
VHX SERIE S S T EAM E RS - COMP O NENT F UNCTI ON F24700 ( O ctober 2001) Page 11 of 68 Relay Bo ard ................... P r o v i d e s a c e n t r a l i z e d l o c a t i o n f o r w i r e h a r n e s s c onnect ions and power transf er t hrough board r elay s (K 1- K 7) t o the steam er c ont rol s.
VHX SERIE S S T EAM E RS - COMP O NENT F UNCTI ON F24700 ( O ctober 2001) Page 12 of 68 COOKING COM PARTMENT CONT ROLS The upper sect i on of t he st eam er c onsi sts of t wo separate cooki ng com par t m ents. E ac h c om par t m ent f uncti ons independent l y wi t h i t s ow n set of contr ol s.
VHX SERIES STEAMERS - REMOVAL AND REPLAC EMENT OF PARTS F24700 ( O ctober 2001) Page 13 of 68 REM OVA L A N D REPL A C EM ENT OF PA R T S COM P ONE NT LO CATIONS Cabi n et Base Bo i ler Co nt ro ls.
VHX SERIES STEAMERS - REMOVAL AND REPLAC EMENT OF PARTS F24700 ( O ctober 2001) Page 14 of 68 Cabi n et Base Bo i ler Co nt ro ls Co nti nu ed.
VHX SERIES STEAMERS - REMOVAL AND REPLAC EMENT OF PARTS F24700 ( O ctober 2001) Page 15 of 68 Cook ing Com partm e nt Cont rols WA T ER LEVEL CONT ROL S (M AI N O R AUX I LIAR Y LL CO ) WA RNING: DISCONNECT THE ELEC TRICAL POW ER TO THE MACHINE AT THE MAIN CIRCUI T BO X.
VHX SERIES STEAMERS - REMOVAL AND REPLAC EMENT OF PARTS F24700 ( O ctober 2001) Page 16 of 68 WA T ER LEVEL GA UGE A SSEMBLY WA RNING: DISCONNECT THE ELEC TRICAL POW ER TO THE MACHINE AT THE MAIN CIRCUI T BO X. P LA CE A T AG O N THE CI RCUIT BOX INDI CAT I NG T HE CI RCUIT IS B E I NG SERVICED.
VHX SERIES STEAMERS - REMOVAL AND REPLAC EMENT OF PARTS F24700 ( O ctober 2001) Page 17 of 68 a. Fr om t he bot tom r i ght si de, rai se the boi l er t wo to thr ee i nches so it ti l ts to t he l ef t. W hen t he rem ai ni ng water has drai ned out, lower t he boi l er bef ore.
VHX SERIES STEAMERS - REMOVAL AND REPLAC EMENT OF PARTS F24700 ( O ctober 2001) Page 18 of 68 BURNER HEA D A SSEMBLY WA RNING: DISCONNECT THE ELEC TRICAL POW ER TO THE MACHINE AT THE MAIN CIRCUI T BO X. P LA CE A T AG O N THE CI RCUIT BOX INDI CAT I NG T HE CI RCUIT IS B E I NG SERVICED.
VHX SERIES STEAMERS - REMOVAL AND REPLAC EMENT OF PARTS F24700 ( O ctober 2001) Page 19 of 68 HEAT EXCHANGER WA RNING: SHUT OFF T HE GAS BEF O RE SERVICING THE UNIT. WA RNING: ALL GAS JOINTS DISTURBED DURING S E RV I CING MUST B E CHE CK E D F OR LEAKS.
VHX SERIES STEAMERS - REMOVAL AND REPLAC EMENT OF PARTS F24700 ( O ctober 2001) Page 20 of 68 12. For c l earanc e of the heat ex c hanger onl y, rem ov e the dr ai n nut ( petcoc k) and t he l ower adjust m ent k nob f rom t he water l ev el gauge. A.
VHX SERIES STEAMERS - REMOVAL AND REPLAC EMENT OF PARTS F24700 ( O ctober 2001) Page 21 of 68 NOT E : I t m ay be necessary to use two cl am ps to draw the bot tom of t he heat ex c hanger c l ose enough to be cl am ped. S t art one c l am p at a 3 o ’ cloc k posi t i on t hen i nstal l other c l am p near the bot t om .
VHX SERIES STEAMERS - REMOVAL AND REPLAC EMENT OF PARTS F24700 ( O ctober 2001) Page 22 of 68 Ha ndle 1. Open t he door . 2. Rem ov e screws fr om t he top and bot tom of t he door. 3. Pul l t he i nner door panel out f rom the door housing wit h t he gasket pl ate and gasket sti l l att ached.
VHX SERIES STEAMER - SERVICE PROCED URES AND ADJUSTMENTS F24700 ( O ctober 2001) Page 23 of 68 SERV ICE P ROCEDURE S A ND A DJUST M ENT S WA RNING: CERTAIN PROCEDU RES IN THIS SECTION REQUIRES ELECTRICAL TEST OR MEASUREMENTS W HILE POW ER IS APPLIED TO THE MACHINE.
VHX SERIES STEAMER - SERVICE PROCED URES AND ADJUSTMENTS F24700 ( O ctober 2001) Page 24 of 68 WA RNING : READ AND FOLLOW THE INST RUCTI ONS F OR T HE DE - LI MI NG CHEMI CA L BEING USED. USE PLASTIC OR RUBBER GLOVES TO AVO I D SKI N CONTACT. I F T HE CHEMI CA L CO MES I N CONT ACT W I TH S K I N, RINSE W I TH CLE A N W A T ER.
VHX SERIES STEAMER - SERVICE PROCED URES AND ADJUSTMENTS F24700 ( O ctober 2001) Page 25 of 68 used, a f requent i nt er v al should be used. T hi s blowdown procedure i s ess enti al t o proper oper ati on and com ponent l i f e by r em ov i ng sedim ent and scalant s that m ay be l odged i n the pr obe housi ng.
VHX SERIES STEAMER - SERVICE PROCED URES AND ADJUSTMENTS F24700 ( O ctober 2001) Page 26 of 68 C. Veri f y LED ’ s on the water l ev el c ont rol board, HL LE D should be of f , and LLCO LED should be illumina ted .
VHX SERIES STEAMER - SERVICE PROCED URES AND ADJUSTMENTS F24700 ( O ctober 2001) Page 27 of 68 boil er shel l, rem ov e and cl ean the Aux LLCO pr obe. a. Replac e the probe and c hec k resistanc e agai n. I f resi stanc e i s s till pr e s en t, in s ta ll a n ew pr obe.
VHX SERIES STEAMER - SERVICE PROCED URES AND ADJUSTMENTS F24700 ( O ctober 2001) Page 28 of 68 Mechani cal Pressure rel i ef v al v e f act or y set t o approx i m at el y 15 P S I . I f t he pr essure in t he boi l er re ach es this lev el, th e valv e w ill OPE N .
VHX SERIES STEAMER - SERVICE PROCED URES AND ADJUSTMENTS F24700 ( O ctober 2001) Page 29 of 68 D. Check port s in v al v e body. 9. Rev er se proc edur e t o i nstal l .
VHX SERIES STEAMER - SERVICE PROCED URES AND ADJUSTMENTS F24700 ( O ctober 2001) Page 30 of 68 MAIN BURNER IGNITION CHECKS The com pl et e gas burner assembl y i s loc at ed i nsi de the heat ex c hanger c asting i n t he boi l er. T he perf orat ed burner head f unct i ons as both pil ot and m ai n gas burner.
VHX SERIES STEAMER - SERVICE PROCED URES AND ADJUSTMENTS F24700 ( O ctober 2001) Page 31 of 68 a. If i gni tor sparks and pi l ot l i ghts, proceed t o step 7. b. If i gni tor does not spark, proceed to step " 5) " bel ow. 5) Restart power ON sequence by "rapi dl y" t urni ng the power sw it c h OF F then bac k ON.
VHX SERIES STEAMER - SERVICE PROCED URES AND ADJUSTMENTS F24700 ( O ctober 2001) Page 32 of 68.
VHX SERIES STEAMER - SERVICE PROCED URES AND ADJUSTMENTS F24700 ( O ctober 2001) Page 33 of 68 A I R PRESSURE SWIT CH ADJ U ST M E NT The ai r pressure sw i t c h senses the press ure l ev el produced by t he blower f or c om busti on.
VHX SERIES STEAMER - SERVICE PROCED URES AND ADJUSTMENTS F24700 ( O ctober 2001) Page 34 of 68 c. Replac e the ori f i ce, pressure sw i t c h and c onnec t the l ead w i res to the s witch . Tu rn th e power s w it ch O N and adj ust t he pressure s w it ch agai n as outl i ned in st eps 4A and 4B.
VHX SERIES STEAMER - SERVICE PROCED URES AND ADJUSTMENTS F24700 ( O ctober 2001) Page 35 of 68 4. Af t er t he m ai n bur ner l i ghts, al l ow the boil er t o reach oper at i ng pr essure then t ur n t he ON/ OF F knob f or t he m ai n gas v alv e t o OF F .
VHX SERIES STEAMER - SERVICE PROCED URES AND ADJUSTMENTS F24700 ( O ctober 2001) Page 36 of 68 GA S MANI FO LD PRESSURE ADJ U ST M E NT WA RNING: DISCONNECT THE ELEC TRICAL POW ER TO THE MACHINE AT THE MAIN CIRCUI T BO X. P LA CE A T AG O N THE CI RCUIT BOX INDI CAT I NG T HE CI RCUIT IS B E I NG SERVICED.
VHX SERIES STEAMER - SERVICE PROCED URES AND ADJUSTMENTS F24700 ( O ctober 2001) Page 37 of 68 7. Once t he corr ect pr essure has been s et, t urn the gas supply and power sw it c h O FF . Repl ace the adj ustm ent screw cap and m ani f ol d pressure plug t ap pl ug on t he v al v e.
VHX SERIES STEAMER - SERVICE PROCED URES AND ADJUSTMENTS F24700 ( O ctober 2001) Page 38 of 68 Spark V eri fi cat i on T est 1. Tur n t he power s w it ch O F F. 2. Check t o ensure that al l el ec t ri cal ter m i nal connect ions on the i gni ti on cont rol m odul e and the i gni t or rod ar e c lean and t i ght .
VHX SERIES STEAMER - SERVICE PROCED URES AND ADJUSTMENTS F24700 ( O ctober 2001) Page 39 of 68 COOKING COMP A RTMENT NOT E : For ac c ess to com part m ent c ont rol s, rem ov e the r i ght si de com part m ent panel . In t ake Shu t-O ff V al ve Adju st men t (S t eam Fl o w) 1.
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 40 of 68 Door Lat ch A djustme nt Shoul d the cook er door j am and c an not be opened, DO NO T FO RCE O R P RY t he door as dam age wil l occur. Fi rst, try l i f t i ng up on t he bot tom of t he door at t he handle end t o di sengage the l at c h.
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 41 of 68 ELECT RICA L OPERA T IO N WA T ER LEVEL CONT ROL S Lo w Level Cut - O ff & Di fferen ti al Con t ro l The steam er i.
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 42 of 68 A uxiliar y Low L evel Cut- O ff Thi s contr ol serv es as a safet y back up t o the m ai n water l ev el contr ol ( W LC) board to m eet CS D- 1 code requi rem ent s.
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 43 of 68 RELA Y BOARD Boa rd La yout and LE D Le gend The r el ay boar d P r ov i des a central i zed l ocat i on f or wi r e har ness connecti ons and pow er t r ansf er t hrough board rel ays (K1-K 7) t o the ot her steam er c ont rol s.
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 44 of 68 Boile r Ope rationa l Sta tus (LED Indicator ) Use the tabl es below to det er m i ne t he oper at i onal stat us of a com ponent or condi t i on by ut ilizin g th e L ED indi cat ors on the board.
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 45 of 68 LED STAT US D ESC RIPTION ELEC TRICA L COMPON ENTS COND ITION ON OFF N1 X s am e as “ state A ” N2 X s am e as ".
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 46 of 68 SEQUENCE OF OPERATION NEW STYLE CONTROLS - BOILER Thi s sequence of oper ati on i s writ ten f or boi l er bases w it h the new styl e boi l er cont rol s. See "BO ILER CO NTRO L ST Y LE S " under " GENE R A L" .
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 47 of 68 NOT E : Rel ay K 4 r em ai ns energi z ed t hrough K4( 1) N.O. lo ckin g circ uit. 1) N8 goes out. K4(1 ) N.O. con tacts cl ose and K4(1) N.C. cont ac t s open. 2) Hi gh pressure li ght ( c ont rol panel ) goes out.
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 48 of 68 upper and l ower s et poi nt l i m i t s. T he cyc l i ng pressure s w it ch cont i nues to energi ze and de-ener gi ze t he heati ng circui t t o cycle t he burner O N and OF F .
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 49 of 68 3. W ater l ev el r eac hes LLCO ( l ow w ater l ev el c ut - of f ) pr obe f or the water l ev el c ont rol and to t he au xiliary LL C O p r obe for t he aux iliary lo w level cut- of f cont rol .
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 50 of 68 upper and l ower s et poi nt l i m i t s. T he cyc l i ng pressure s w it ch cont i nues to energi ze and de-ener gi ze t he heati ng circui t t o cycle t he burner O N and OF F .
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 51 of 68 - T HIS PAG E INT ENT IONALLY LEFT BLANK -.
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 52 of 68 SCHEMAT ICS Mod els Bu il t After 5/25/ 00 (New S t yl e Boi ler Co nt ro ls).
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 53 of 68.
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 54 of 68 Models Built Be for e 5 /25/0 0 ( Old Sty le B oiler C ontr ols).
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 55 of 68 Cook ing Com partm e nt Cont rols.
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 56 of 68 WIRING DIAG RA M S Mod els Bu il t After 5/25/ 00 (New S t yl e Boi ler Co nt ro ls).
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 57 of 68.
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 58 of 68 Models Built Be for e 5 /25/0 0 ( Old Sty le B oiler C ontr ols).
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 59 of 68.
VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 60 of 68 Cook ing Com partm e nt Cont rols.
VHX SERIES STEAMER - TROUBLESHOOTING F24700 ( O ctober 2001) Page 61 of 68 TROUBLESHOOTING BOILER BA SE CONTROLS WA RNING : CERTAI N PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TESTS OR MEASUREMENTS W HILE POW ER IS APPLIED TO THE MACHINE. EXER CISE EX TREME CAUTION AT ALL TIMES.
VHX SERIES STEAMER - TROUBLESHOOTING SYMPT O M POSSIBLE CAU SES F24700 ( O ctober 2001) Page 62 of 68 Bl ower operati ng, no pi l ot gas f l ow. 1. Mai n gas s upply t urned O F F. 2. Igni ti on m odul e l oc k out . T urn power sw i t c h O FF f or sev er al seconds then ON t o r eset t he m odul e.
VHX SERIES STEAMER - TROUBLESHOOTING SYMPT O M POSSIBLE CAU SES F24700 ( O ctober 2001) Page 63 of 68 Gas odor. 1. Leaks in pi pe f i tt i ng c onnec t i ons or com ponent s. 2. Leaki ng pressure tap pl ug on pi l ot or m ai n gas v al v e; l oose or m i ssing pressure adjustm ent screw cap on mai n gas v al v e.
VHX SERIES STEAMER - TROUBLESHOOTING SYMPT O M POSSIBLE CAU SES F24700 ( O ctober 2001) Page 64 of 68 Boiler Sl ow to Pre ss urize (ov er 15 m i n. t o ac hiev e oper at i ng pressure) 1. Low w at er suppl y pressure, i nl i ne water strai ner cl ogged or f il l solenoi d v al v e m al f uncti on.
VHX SERIES STEAMER - TROUBLESHOOTING SYMPT O M POSSIBLE CAU SES F24700 ( O ctober 2001) Page 65 of 68 Steam out put l ow or slow cooki ng. 1. Cooking Com part m ent. A. Bl ocked st eam i nj ec tor por t s. (O pen door, pr ess door sw i t c h but ton and v eri f y good steam f low int o com part m ent).
VHX SERIES STEAMER - TROUBLESHOOTING F24700 ( O ctober 2001) Page 66 of 68 COOKING COMPARTMENT CONTROLS SYMPT O M POSSIBLE CAU SES Cooki ng com part m ent s do not operat e. 1. No power to com part m ents. 2. Pressure in boi l er i s below com par t m ent pr essure sw i t c h s ettin g.
VHX SERIES STEAMER F24700 ( O ctober 2001) Page 67 of 68 - N OT ES -.
VHX SERIES STEAMER - CONDEN SED SPARE PARTS LIST F24700 ( O ctober 2001) Printed in U.S.A. CO NDENSED SPA R E PA R T S LIST NEW STY LE CONT ROLS ONLY VHX 24G, VHX 24G5, MH B24G PART NUM BE R DESCRI P .
An important point after buying a device Vulcan-Hart MHB24G (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Vulcan-Hart MHB24G yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Vulcan-Hart MHB24G - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Vulcan-Hart MHB24G you will learn all the available features of the product, as well as information on its operation. The information that you get Vulcan-Hart MHB24G will certainly help you make a decision on the purchase.
If you already are a holder of Vulcan-Hart MHB24G, 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 Vulcan-Hart MHB24G.
However, one of the most important roles played by the user manual is to help in solving problems with Vulcan-Hart MHB24G. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Vulcan-Hart MHB24G 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
