Manuale d’uso / di manutenzione del prodotto VB/VW- 750 del fabbricante A.O. Smith
Vai alla pagina of 52
1 W ARNING: If the information in this manual is not followed exactly , a re or explosion may result causing property damage, personal injury or loss of life. — Do not store or use gasoline or other ammable vapors and liquids in the vicinity of this or any other appliance.
2 SAFE INST ALLA TION, USE AND SER VICE The proper installation, use and servicing of this boiler is extremely important to your safety and the safety of others. Many safety-related messages and instructions have been provided in this manual and on your boiler to warn you and others of a potential injury hazard.
3 GENERAL SAFETY.
4 Minimum clearances to combustibles: •4”(102mm)rear •0”(0mm)top&sides •6”(152mm)vent T ABLE 1. - GAS AND ELECTRICAL CHARACTERISTICS Manifold Pressure Maximum Supply Pressure Minimum Supply Pressure Model T ype of Gas Inches W .
5 CAP ACITY AND FLOW DA T A T ABLE 3. RECOVERY CAP ACITIES. T ABLE 4. PUMPING PERFORMANCE GUIDE. VB MODELS - FLOW, HEAD LOSS AND TEMPERA TURE RISE 20F° (1 1°C) t 30F° (17°C) t 40F° (22°C) t Maxi.
6 This design complies with the current edition of the ANSI Z21.13 low-pressure boiler standard. Compliance under this standard implies that when the boiler underwent test, the gas manifold and control assembly pro vided on the boiler met safe lighting and other performance criteria.
7 GROUNDING INSTRUCTIONS This boiler must be grounded in accordance with the National Electrical Code and/or local codes. Boiler is polarity sensitive; correct wiring is imperative for proper operation.
8 THE CONTROL SYSTEM The control system consists of four basic components: 1) Modulation Control Board (MCB); 2) Power Distribution Board (PDB); 3) V ariable Frequency Drive (VFD), see Figure 2; User Interface Module, see Figure 20.
9 W A TER TEMPERA TURE LIMIT CONTROLS The “V(B/W)” modelsincorporate anoutlet water probe consisting of two limit controls: 1. A Manual Reset High limit control that can be set as high as either 210°F(99°C)or235°F(1 13°C),dependingontheapplication.
10 The Discharge Pipe: • Shall not be smaller in size than the outlet pipe size of the valve, or have any reducing couplings or other restrictions. • Shall not be plugged or blocked. • Shall not be exposed to freezing temperatures. • Shall be of material listed for hot water distribution.
11 FIGURE 8. CHEMICAL V APOR CORROSION Boiler corrosion and component failure can be caused by the heating and breakdown of airborne chemical vapors. Spray can propellants, cleaning sol vents, refrige.
12 for th e open ings th at provid e fres h air into c on ned spac es only . Do not r efer to the se illus trati ons fo r the pur po se of vent insta llati on. See Venting Inst allati on on pa ge 18 for com plete venting installation instruct ions.
13 AIR FROM OTHER INDOOR SP ACES FIGURE 9E. The confined space should be provided with two permanent openings, onecommencing within 12 inches (300 mm)of the top andone commencing within 12 inches(300 mm) of thebottom of the enclosure.
14 TERMINA TION CLEARANCES SIDEW ALL POWER VENT V X VENT TERMINAL AIR SUPPL Y INLE TA RE A WHERE TERMINAL IS NO T PERMITTED v v A G V FIXED CLOSED FIXED CLOSED OPERABLE OPERABLE V C B B B B F B V V A J V H M X X V V K B E D L POWER VENT (using room air for combustion) EXTERIOR CLEARANCES FOR SIDEW ALL VENT TERMINA TION Figure 9F .
15 TERMINA TION CLEARANCES SIDEW ALL DIRECT VENT V X VENT TERMINAL AIR SUPPL Y INLE TA RE A WHERE TERMINAL IS NO T PERMITTED v v A G V FIXED CLOSED FIXED CLOSED OPERABLE OPERABLE V C B B B B F B V V A J V H M X X V V K B E D L DIRECT VENT (using outdoor air for combustion) EXTERIOR CLEARANCES FOR SIDEW ALL VENT TERMINA TION Figure 9G.
16 VENTING VENT SIZING, INST ALLA TION AND TERMINA TION SHALL BE IN ACCORDANCE WITH THIS INST ALLA TION MANUAL. ALL ELECTRICAL POWER AND GAS MUST BE TURNED OFF PRIOR TO ANY INST ALLA TION OF THE VENTING SYSTEM.
17 VENTING SUPPORTS Care must be taken in the installation of the venting system that adequate support is maintained throughout the installation process. When extending more than 10 feet (3.0m) vertically , vertical support kitsare requiredonce every 10feet (3.
18 NOTES: If the exhaust vent terminal is within 10’ (3.0m) of a wall or parapet, it must extend a minimum of 2’ (610mm) above the wall or parapet. Joints a re not joined to show vent pipe orientation. FIGURE 1 1. VERTICAL TERMINA TION. FIGURE 1 1A.
19 DIRECT VENT INST ALLA TION REQUIREMENTS Follow the guidelines in the “HORIZONT AL INST ALLA TION REQUIREMENTS” section for the exhausting of flue products. IMPORT ANT The labels in the Direct V ent Kit must be affixed to the boiler in locations specified by the instruction sheet provided in the kit.
20 FIGURE 12. DIRECT VENT HORIZONT AL. FIGURE 12A. DIRECT VENT VERTICAL. CAUTION Direct venting into dead air spaces such as; alleys, atriums and inside corners can cause recirculation of ue gases.
21 FIGURE 12B. DIRECT VENT , VERTICAL VENT TERMINA TION WITH HORIZONT AL INT AKE. FIGURE 12C. DIRECT VENT USING TWT WITH VERTICAL INT AKE. Option B (Figures 12B & 12C) assures no recirculation of ue gases. 70 EQUIV ALENT FEET (27.4m) OF VENTING (MAX.
22 SYSTEM INST ALLA TION GENERAL If the system is to be filled with water for testing or other purposes during cold weather and before actual operation, care must be taken to prevent a downdraft entering the boiler or freezing air from contacting the system.
23 7. SYSTEM CONTROLLER Controlling of these systems is decided mainly by the type of building system controlling desired. A single boiler installation might be controlled directly from space temperature thermostat(s).
24 This is accomplished by changing two dipswitch settings on the MCB. First, dipswitch “4” must be set to the “ON” position to designate the remote probe as the controlling probe.
25 FIGURE 13. TYPICAL PRIMAR Y , SECONDAR Y PIPING. • INST ALLIN ACCORDANCEWITHALL LOCALCODES. • WHEN BLOW DOWN V AL VE IS REQUIRED, INST ALL IN PLACE OF THE DRAIN V AL VE SHOWN. DANGER TEMPERA TURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERA TURE A T FIXTURES.
26 DANGER TEMPERA TURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERA TURE A T FIXTURES. IF HIGHER PREHEA T TEMPERA TURES ARE NECESSAR Y TO OBT AIN ADEQUA TE BOOSTER OUTPUT , ADD AN ANTI-SCALD V AL VE FOR HOT W A TER SUPPLIED TO FIXTURES, SEE T ABLE 8. ONE VF (MODEL VW) HOT W A TER SUPPL Y BOILER WITH VERTICAL T ANK FIGURE 14.
27 ONE VF (MODEL VW) HOT W A TER SUPPL Y BOILER WITH HORIZONT AL T ANK DANGER TEMPERA TURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERA TURE A T FIXTURES. IF HIGHER PREHEA T TEMPERA TURES ARE NECESSARY TO OBT AIN ADEQUA TE BOOSTER OUTPUT , ADD AN ANTI-SCALD V AL VE FOR HOT W A TER SUPPLIED TO FIXTURES, SEE T ABLE 8.
28 WIRING Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. V erify proper operation after servicing. Strict adherence to the wiring diagrams is required to prevent constant pump operation when the system controller is satised.
29 SUGGESTED PIPE SIZING T ABLES T ABLE 7. Suggested Pipe Size For Multiple Gas Appliances (Propane Gas). Nominal MaximumCapacityofPipeinBTU/hrandkWforGasPressuresof14in.W .C.(0.5psi)orLessand IronPipe aPressureDropof0.
30 WIRING DIAGRAM FIGURE 17. CONNECTION DIAGRAM.
31 WIRING DIAGRAM.
32 FIGURE 18. - SCHEMA TIC DIAGRAM VB/VW-500, 750 & 1000 SCHEMA TIC DIAGRAM.
33 OPERA TION IMPORT ANT O n l y q u a l i e d p e r s o n n e l s h a l l p e r f o r m t h e i n i t i a l r i n g o f t h e b o i l e r . At this t ime th e user sh ould not h esit ate to ask the s er vic e ag ent any quest ions re gardi ng the o per ation a nd mainte nanc e of the uni t.
34 The boiler should be located in an area that is inaccessible to the general public. Never allow small children to use a hot water tap or to draw their own bath water . Never leave a child or handicapped person unat- tended in a bathtub or shower . T ABLE 8.
35 MCB - T en Position Dipswitch: Dipswitchcongurations are READ ONL Y ON POWER UP . These switches are only to be set at the factory or by authorized trained personnel! Once set the boiler will operate according to the chosen options. If a switch is changed, power must be cycled before the change will take effect.
36 LIGHTING & OPERA TION INSTRUCTIONS FOR MODELS VB/VW 500, 750 AND 1000:.
37 ADJUSTMENT There must be sufcient load to operate the boiler at high re to perform the following adjustments.
38 INPUTS TO MCB TEMPERA TURE SENSORS: T emperature probes (MCB - outlet and either inlet or tank are required): The MCB accepts analog temperature inputs from uptothreesensors(inlet,outlet,andtank).
39 NOTE: If the unit powers up with the number of stages selected by dip switches exceeding the number of FCBs, the MCB will detect this condition and go into a hard lockout. After changing the dipswitches, the power must be cycled off and back on to accept any changes.
40 UIM OPERA TING PROCEDURES FIGURE 20. UIM, USER INTERF ACE MODULE The UIM receives commands from the user and displays operational information to the user via an LCD (liquid crystal display) up to eleven LED’s,andvetouchswitches.
41 The process waits in this state until the call for heat is satised, the thermostat input is opened, or a fault occurs. When heat is satised, the sequence continues to Post-Purge and then back to Idle.
42 Use the following procedure to change the automatically resettable High Limit Setpoint: 1. Press the MENU key . 2. Scroll the “>” with the DOWN key next to USER SETTING SCREEN. 3. Press the SELECT key . 4.
43 • Up and Down Keys: These keys are used to move upwards and downwards in screens to reach a desired item and to change setpoints and user settings. They have an auto increment/decrement feature for some of the configurations and values.
44 TROUBLESHOOTING IGNITION SYSTEM FaultMessagesandLockoutStatus(*=stagenumber:1,2,3,or4) F AUL T DISPLA YED DESCRIPTION RED LED LOCKOUT “Display Fail” Communications with UIM interrupted Continuous Auto Reset Check communication cable to UIM.
45 TROUBLESHOOTING GAS V AL VE Problem: Non-linear CO 2 curve on adjusted boiler (deviation more than 3-6%) 1 . Possible blockage at the air inlet that prevents uniform, constantairow . 2. The gas inlet pressure is too low at full load. Problem: Unstable CO 2 level at minimum load Theminimumload(lowfire)istoolow.
46 Any safety devices including low water cutoffs used in conjunction with this boiler should receive periodic (every six months) inspection to assure proper operation. A low water cutoff device of the oat type should be ushed every six months.
47 lines with air or water and clear or replace the blocked portions of the line as necessary . Note that areas of the drain line which include a sag or low spot in the line will also form a condensate trap which can be removed by levelling the tube and does not indicate a blocked system.
48 NOTES.
49 NOTES.
50 NOTES.
51 LIMITED W ARRANTY A. O. Smith Corporation, the warrantor , extends the following LIMITED W ARRANTY to the owner of this boiler: 1. If within TEN years after initial installation of the boiler , a h.
52 500 T ennessee Waltz Parkway , Ashland City , TN 37015 Phone: 800-433-2545 www .hotwater .com E-Mail: parts@hotwater .com.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il A.O. Smith VB/VW- 750 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del A.O. Smith VB/VW- 750 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso A.O. Smith VB/VW- 750 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul A.O. Smith VB/VW- 750 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il A.O. Smith VB/VW- 750, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del A.O. Smith VB/VW- 750.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il A.O. Smith VB/VW- 750. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo A.O. Smith VB/VW- 750 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
