Manuale d’uso / di manutenzione del prodotto COBT del fabbricante A.O. Smith
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1 W ARNING – PROP ANE MODEL W ater heaters for propane gas are different from natural gas models. A natural gas heater will not function safely on propane gas and no attempt should be made to convert a heater from natural gas to propane gas. Propane gas must be used with great caution.
2 FOREWORD This manual is intended to be used in conjunction with other literature provided with the heater . This includes power burner and related gas control information. It is important that this manual and the additional publications be reviewed in their entirety before beginning any work.
3 GENERAL SAFETY INFORMA TION PRECAUTIONS DO NOT USE THIS APPLIANCE IF ANY P ART HAS BEEN UNDERW A TER. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water .
4 The water temperature is controlled by two thermostats. One thermostat is located near the top of the tank and the other is in the lower part of the tank.
5 The latest version of the National Electrical Code, NFP A No. 70. In Canada refer to Canadian Electrical Code C 22.1, from National Fire Protection Association, 1 Batterymarch Park, Quicy , MA 02269-9101. LOCA TING THE HEA TER When inst alling the heater, consideration must be given to proper location.
6 UNDESIRABLE OPENINGS, CAUSING POOR COMBUSTION. SOOTING MA Y RESUL T WITH AN INCREASED RISK OF ASPHYXIA TION. THERMAL EXP ANSION (CLOSED SYSTEM) Thermal expansion occurs in any hot water system when system water is heated or “recovered” during periods of non-use.
7 Where an existing chimney or vent is to be used, be sure that the chimney or vent has adequate capacity for the number and sizes of gas appliances being vented through it. Inspect the chimney or vent and remove all soot or other obstructions, which will retard free draft.
8 T ABLE 3 EQUIV ALENT LENGTH OF FITTINGS IN FEET Pipe Size (IPS) 1 1.25 1.5 2 2. 5 3 4 S td. T ee through side 5.5 7.5 9 .0 12.0 14.0 17.0 22.0 S td. E1 1 2.7 3 .7 4.3 5.5 6.5 8.0 12.0 45°F E1 1 1.2 1.6 2.0 2.5 3.0 3.7 5.0 Plug Cock 3.0 4.0 5.5 7.5 9.
9 TYPICAL WIRE DIAGRAM BTP , 270 - 2,500 KBTUH COF , 800 - 2,500 KBTUH COBT , 400 - 2,500 KBTUH TYPICAL WIRE DIAGRAM BTP , 140 - 255 KBTUH.
10 TYPICAL WIRE DIAGRAM COF , 140 - 720 KBTUH TYPICAL WIRE DIAGRAM COBT , 140 - 300 KBTUH.
11 OF ELECTRICAL SHOCK. DO NOT ENERGIZE THE BRANCH CIRCUIT BEFORE THE HEA TER T ANK IS FILLED WITH W A TER. TWO UNIT MANIFOLD INST ALLA TION Assure water flow balance of all units. Without this balance, the full water heating and storage potential of the system cannot be achieved.
12 3. The correct test instruments are: •C O 2 indicator or 0 2 analyzer • CO indicator • Stack thermometer • Draft gauge or inclined manometer • U-tube manometer or calibrated 0-10” and 0-35” w . c. pressure gauge • Combination volt/ammeter .
13 Lime accumulation not only reduces the life of the equipment but also reduces efficiency of the heater and increases fuel consumption. The usage of water softening equipment greatly reduces the hardness of the water . However , this equipment does not always remove all of the hardness (lime).
14 BURNER AIR OPENINGS OR VENTILA TION GRILLES FOR COMBUSTION AIR. REMOVE LINT ACCUMULA TION FROM AIR INT AKE GRILL. At least annually , contact a qualified service agency for burner cleaning and other routine maintenance. CLEANING FLUES-COF & COBT ONL Y The following describes how to gain access to the tank flues for cleaning if necessary .
15 W A TER HEA TER MAKES NOISE 1. Sediment or lime scale accumulations cause noises when the heater is operating. • The sounds are normal, however , the tank bottom should be cleaned. Refer to MAINTENANCE for details. 2. Some of the electrical components of the water heater make sounds, which are normal.
16 CERTIFIED F ACTOR Y ST ART - UP REQUIRED T o activate your warranty , contact your local sales represent ative or Authorized S tart-up Agent to arrange for a FREE Certified S tart-up. A.O. Smith Corporation, the warrantor, extends the following LIMITED W ARRANTY to the owner of this water heater.
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 COBT 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 COBT - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso A.O. Smith COBT imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul A.O. Smith COBT ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il A.O. Smith COBT, 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 COBT.
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 COBT. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo A.O. Smith COBT 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.
