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Vulcan-Hart MHB24G manual

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Table of contents for the manual

  • Page 1

    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. If yo u h ave atten ded a Vul can S ervice Sc hool for this product , yo u ma y be qua lifie d to pe rf [...]

  • Page 2

    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 ......................................................................... 4 Mai ntenance .................................................................[...]

  • Page 3

    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......................................................... 3 4 G a s M a n i f o l d P r e s s u r e A d j u s t m e n t .......[...]

  • Page 4

    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. CLEA NING Ref er t o t he I[...]

  • Page 5

    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. St eam er s that were in stock at the t i m e of t he boi l er c ont rol changeov er were rem ov ed and equipped wit h the new styl e contr ols wit hout recor di ng[...]

  • Page 6

    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. M ost water suppli es contai n scale p[...]

  • Page 7

    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. NAT. PRO P. MIN IMU M RECOM M ENDED MIN IMU M RECOM M ENDED VHX24G 200, 000 200,000 3.0 3.0 3. [...]

  • Page 8

    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. The VH X Seri es steam er s are CSD- 1 c om pl i ant and are e[...]

  • Page 9

    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. 2. Set bot h ti m er k nobs at 2 m i nut es. T he ready ligh ts w ill go off, the co o kin g lig[...]

  • Page 10

    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 ) .......... R e s e t s t h e l o w w a t e r l e v e l s a f e t y c i r c u i t o n i n i[...]

  • Page 11

    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. Al so, prov i des a condi ti on or c om ponent[...]

  • Page 12

    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. Power i s s uppli ed t o t he cont r ol s only af[...]

  • Page 13

    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[...]

  • Page 14

    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[...]

  • Page 15

    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. 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 SE[...]

  • Page 16

    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. 1. Open t he c abinet base door and rem ov e the ri g[...]

  • Page 17

    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. proceedi ng. B. Rem ov e t he drai n/scal e cl ean-out pl ug f rom t [...]

  • Page 18

    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. WA RNING: SHUT OFF T HE GAS SUPPLY BEFORE SERVICING THE UNIT.[...]

  • Page 19

    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. CHECK W ITH A SOAP AND W ATER SOLUTION (BUBBLES). DO NOT USE AN OPEN FLAME. 1. Bl owdow n t he b[...]

  • Page 20

    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. Rem ov e t he rem ai ni ng bol ts on the heat ex c hanger then pul l heat ex c hanger strai ght o[...]

  • Page 21

    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 . O nce t he bol t s are t [...]

  • Page 22

    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. 4. Rem ov e t he nuts and spacers f r om t he handl e [...]

  • Page 23

    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. EXER CISE EX TREME CAUTION AT ALL TIMES. I F TEST POI NT S ARE NOT EASI LY ACCESSIBL[...]

  • Page 24

    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. 5. Mi x del i m i ng[...]

  • Page 25

    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. NOT E : Boi l er shoul d be wit hi[...]

  • Page 26

    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 . 3. Open t he bal l v alv e i n the pr obe housi ng ass em bl y ( boi l er l ef t si de) about hal f way, t o gradual ly r em ov e bo[...]

  • Page 27

    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. b. Replac e lead wi r e on pr obe and repeat st eps "2) t hru 4)" t[...]

  • Page 28

    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 . A. Hig h p res s ure ligh t ( a mbe r) w ill come ON. 1) I f the pressure sw i t c[...]

  • Page 29

    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 . BOILER BLOWDOWN/DRAIN SOL ENO ID VA LVE The water c ont ai ned i n t he boi l er, bei ng under pressure, should be "bl own through" t his v al v e and be noti ceabl y v i[...]

  • Page 30

    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. The i nner por t ion of the per f or [...]

  • Page 31

    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. A r apid swit[...]

  • Page 32

    VHX SERIES STEAMER - SERVICE PROCED URES AND ADJUSTMENTS F24700 ( O ctober 2001) Page 32 of 68[...]

  • Page 33

    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. W hen t he pressure is suff ic i ent , the switc h c l oses and s uppli es power to the i gni ti on cont r ol m od[...]

  • Page 34

    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. Veri f y t he pil ot gas v al v e i s energiz i n[...]

  • Page 35

    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 . 5. Restart t he igni t i on sequence by " r api dl y" turni ng t he power sw it [...]

  • Page 36

    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. WA RNING: SHUT OFF T HE GAS SUPPLY BEFORE [...]

  • Page 37

    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. 8. Tur n t he gas s upply on and c hec k f or proper operati on.[...]

  • Page 38

    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 . I f t he i gni ti on cabl e appe[...]

  • Page 39

    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. W i t h the r i ght si de com part m ent panel rem ov ed, open t he i[...]

  • Page 40

    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. If that does not work, rem o[...]

  • Page 41

    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 s equipped wi t h thr ee water l ev el sens ing pr obes (hi gh, l ow and low lev el c ut -of f ) and a singl e water l ev el cont r ol board ( sol i [...]

  • Page 42

    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. T he operat i on of t he aux iliar y contr ol i s ident i c al t o t he l ow lev el cut - of f (LLCO )[...]

  • Page 43

    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. Al so, prov i des a condi ti on or c om[...]

  • Page 44

    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. The oper at i onal stat e ’ s are di v i ded i nto c at egori es A thr[...]

  • Page 45

    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 "stat e B " N3 X s am e as “ state A ” N4 X s am e as "stat e B N5 X Res et sw it ch i s/was m om ent ari l y energi zed K3 energi zed -[...]

  • Page 46

    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" . Ref er t o schem at i c di agram T SP[...]

  • Page 47

    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. C. N11 li t . K4(2 ) N .O. co nta cts clo s e. 1) K5 i[...]

  • Page 48

    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 . Thi s sequence conti nues unti l one of t he f ol l owing occ ur s: 1) Power sw it ch i s [...]

  • Page 49

    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 . A. LLCO rel ay ener gi zes, LLCO cont ac t s (N.O.) CL OSE and LED l i [...]

  • Page 50

    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 . Thi s sequence conti nues unti l one of t he f ol l owing occ ur s: 1) Power sw it ch i s [...]

  • Page 51

    VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 51 of 68 - T HIS PAG E INT ENT IONALLY LEFT BLANK -[...]

  • Page 52

    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)[...]

  • Page 53

    VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 53 of 68[...]

  • Page 54

    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)[...]

  • Page 55

    VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 55 of 68 Cook ing Com partm e nt Cont rols[...]

  • Page 56

    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)[...]

  • Page 57

    VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 57 of 68[...]

  • Page 58

    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)[...]

  • Page 59

    VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 59 of 68[...]

  • Page 60

    VHX SERIES STEAMER - ELECTRICAL OPERATION F24700 ( O ctober 2001) Page 60 of 68 Cook ing Com partm e nt Cont rols[...]

  • Page 61

    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. I F TEST POI NT S ARE NOT EASI LY ACCESSIBLE, DISCONNECT POW ER, AT[...]

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    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. 3. Ai r pressure sw i tc h: A. Not m ount ed i n[...]

  • Page 63

    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. 3. Leaki ng gaskets in ai r/ gas mi[...]

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    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. S ee " I NLINE W A T ER ST RAI NE R CLEANI NG [...]

  • Page 65

    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). B. St eam sol enoid v al v e not f ul l y open[...]

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    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. 3. Door sw it ch m al f unct i on. 4. Ti m er m al f unct i on[...]

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    VHX SERIES STEAMER F24700 ( O ctober 2001) Page 67 of 68 - N OT ES -[...]

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    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 T IO N NOT ES 853582-1 Igni ter , Sensor 850778-1 Swit c h, Ai r Pr essure 850735-1 Bl ower, Com bustion 354344-4 Val v e, Pi l ot Gas 851315-1 Val v [...]