Bradford-White Corp GX2-25S manuale d’uso

238 - 43480 - 00 B REV 12/03 S INGLE - WALL I NDIRECT WATER HEATER A Spanish language version of these instructions is available by contacting the manufacturer listed on the rating plate. La version e spanola de estas instrucc ions se puede obtener al escribirle a la f á brica cuyo nomb re aparece in la placa de especificaciones. INSTALLATION/OPER[...]

2 For your family’s comfort, safety, and convenience, we recommend this water heater be installed and serviced by a p lumbing professional. INTERNET VERSION FOR REFERENCE ONLY[...]

3 CONGRATULATIONS! You have just purchased one of the finest water heaters on the market today! This installation, operation, and instruction manual will exp lain in detail the installation and maintenance of your new indirect water heater. We strongly recommend that you contact a plumbing professional for the installation of this water heater. We [...]

4 SECTION I IMPORTANT INFORMATION - READ CAREFULLY - The equipment must be installed in accordance with those installation regulations required in the area where the installation is to be made. Thes e regulations must be carefully followed in all cases. Authorities having jurisdiction shall be consulted before installations are made. All wiring on [...]

5 INTERNET VERSION FOR REFERENCE ONLY[...]

6 DANGER DO NOT store or use gasoline or other flammable, combustible, or corrosive vapors and/or liquids in the vicinity of this or any other appliance. IF YOU SMELL GAS: q DO NOT try to light any appliance. q DO NOT touch any electric switch; do not use any telephone in your building. q Immediately call your gas supplier from a t elephone in anot[...]

7 WARNING Installation is not complete unless a pressure and temperature relief valve is installed into the side of the water heater. See the Water Connections section of this manual for details. This water heater contains very hot water un der high pressure. Do not unscrew any pipe fittings or attempt to disconnect any components of this water hea[...]

8 INTERNET VERSION FOR REFERENCE ONLY[...]

9 INTERNET VERSION FOR REFERENCE ONLY[...]

10 WARNING It is the responsibility of the installing contractor to see that all controls are correctly install ed and are operating properly when the installation is complete. DO NOT operate the water heater with jumpered or absent controls or safety devices. DO NOT tamper with or alter the water heater and/or controls. DO NOT operate the water he[...]

11 INTERNET VERSION FOR REFERENCE ONLY[...]

12 CAUT ION The maximum boiler water supply temperature to the indirect heat exchanger must not exceed 240°F (116°C). NOTICE Insulation blankets are not required for this water heater. This water heater meets or exceeds the ASHRAE/IES 90.1b standards with re spect to insulation and standby loss requirements. TABLE OF CONTENTS I - IMPORTANT INFORM[...]

13 SECTION II SPECIFICATIONS Figure 1 – Tank Layout Table 1: Water Heater Dimension (Inches) MODEL A B C D E F SW - 2 - 30 - L 22 33 - 5/8 28 - 1/4 34 - 3/8 5 - 3/8 27 - 1/2 SW - 2 - 40 - L 24 36 29 - 3/4 36 - 3/4 5 - 3/8 27 - 1/2 SW - 2 - 50 - L 26 36 29 - 3/4 36 - 3/4 5 - 3/8 27 - 1/2 SW - 2 - 65 - L 22 59 - 1/4 53 - 1/8 60 5 - 3/8 27 - 1/2 SW [...]

14 1/8 3/4 SW - 2 - 80 - L 24 59 52 - 7/8 59 - 3/4 5 - 3/8 27 - 1/2 SW - 80C - 5 24 59 52 - 7/8 59 - 3/4 5 - 3/8 47 - 3/4 SW - 2 - 120 - L 28 - 1/ 4 62 - 1/2 55 - 3/4 63 - 1/4 6 - 3/8 28 - 1/2 SW - 120C - 5 28 - 1/4 62 - 1/2 55 - 3/4 63 - 1/4 6 - 3/8 48 - 3/4 INTERNET VERSION FOR REFERENCE ONLY[...]

15 Table 2: Water Heater Capacities MODEL Tank Capacity (Gal) Coil Volume (Gal) Dry Weight (Lbs) Wet Weight (Lbs) SW - 2 - 30 - L 30 2.6 140 404 SW - 2 - 40 - L 40 2.6 168 514 SW - 2 - 50 - L 50 2.6 196 623 SW - 2 - 65 - L 60 2.6 196 704 SW - 65C - 5 58 5.0 265 768 SW - 2 - 80 - L 75 2.6 224 861 SW - 80C - 5 73 5.0 293 920 SW - 2 - 120 - L 116 2.6 [...]

16 Table 4: Water Heater Performance (continued) NOTICE If the boiler takes longer to heat up from a cold start than the water availability as noted above, hot water shortage may occur. Hot water availability is based off drawing 80% of the heated tank volume at 4 gallons per minute flow rate. The maximum heat transfer through the co il (heat input[...]

17 complian ce with the code. INTERNET VERSION FOR REFERENCE ONLY[...]

18 SECTION III GENERAL INFORMATION FEATURES This water heater contains the following features: HEAT EXCHANGER -- The heat exchanger (coil) has 1” NPT female fittings. These water heaters with single - wall heat exchangers meets the Unif orm Plumbing Code for installation in all potable water systems provided that: • The boiler water (including [...]

19 Setting the water heater temperature at 120°F will reduce the risk of scalds. Some states require settings to specific lower temperatures. INTERNET VERSION FOR REFERENCE ONLY[...]

20 TEMPERATURE AND PRESSURE RELIEF VALVE — WARNING Keep clear of the combination temperature and pressure relief valve discharge line outlet. The discharge may be hot enough to cause scald injury. The water is under pressure and may splash. For protection against excessive temperature s and pressure, install temperature and pressure protective eq[...]

21 INTERNET VERSION FOR REFERENCE ONLY[...]

22 SACRIFICIAL ANODES — Three sacrificial anode rods have been installed in the tank head to extend tank life. The anode rods should be inspected annually to determine the amount of sacrificial decay and replaced when necessary to prolong tank life. Water conditions in your area will influence the time interval for inspection and r eplacement of [...]

23 SECTION IV PRE - INSTALLATION UNPACKING INSPECT SHIPMENT carefully for any signs of damage. If damage is noted, do not install the product. Contact the shipper or manufacturer listed on rating plate. All equipment is carefully manufactured, inspected, and packed. Our responsibility ceases upon delivery of the packaged heater to the carrier in go[...]

24 Answer: New Rating = 297 gal/hr x (180,000 BTU/h)/(220,000 BTU/h) = 297 gal/hr x 0.818 = 243 gal/hr NOTICE Increasing the boiler DOE heating capacity above the values listed in Table 3 will not increase the rating of the w ater heater. Ratings are based on 200°F boiler water. If 180°F boiler water is supplied, First Hour and Continuous Draw ra[...]

25 heater in use. For this reason, the preferred method of zone control is with circulators. INTERNET VERSION FOR REFERENCE ONLY[...]

26 1. Circulators – With space heating zones usi ng circulators, the Single - wall Indirect should be added as an additional zone with a circulator. 2. Zone Valves – Select a valve with a low - pressure drop to assure adequate flow through the water heater. 3. Hybrid – The space heating zone can be zoned using zon e valves and the Single - wa[...]

27 Component Location Clearance from Combustible Materials Top Sides Front Rear 0” 0” 0” 0” Table 5 – Combustible Material Clearances Recommended Service Clearances Non - Piping Side Front (Aquastat) Rear T & P Relief Valv e Side 4” 16” 0” 4” Table 6 – Service Clearances CAUTION This water heater must be located in an area w[...]

28 Appliance Location 1. Boiler Location – Locate the Single - wall Indirect as close to the boiler as p ractical. 2. Fixture Locations – For fastest delivery of hot water, place the Single - wall Indirect close to points of use. Additional Recommended Components 1. Shut - off Valves – Allows isolation of water heater from domestic water syst[...]

29 SECTION V WATER CONNECTIONS WARNING FAILURE TO INSTALL AND MAINTAIN A NEW, LISTED TEMPERATURE AND PRESSURE RELIEF VALVE WILL RELEASE THE MANUFACTURER FROM ANY CLA IM WHICH MIGHT RESULT FROM EXCESSIVE TEMPERATURE AND PRESSURES. Hydrogen gas can be produced in an operating water heater that has not had water drawn from the tank for a long period o[...]

30 INSTALL TEMPERATURE AND PRESSURE RELIEF VALVE (if not factory installed) INS TRUCTIONS FOR POTABLE CONNECTIONS 1. BEFORE PROCEEDING WITH THE INSTALLATION, CLOSE THE MAIN WATER SUPPLY VALVE. After shutting off the main water supply, open a faucet to relieve the water line pressure to prevent any water from leaking out of the pipes whi le making t[...]

31 streams of water flow through the faucets, close them and check all water connections for possible leaks. 4. NEVER OPERATE THE WATER HEA TER WITHOUT FIRST BEING CERTAIN THAT IT IS FILLED WITH WATER. INSTRUCTIONS FOR BOILER CONNECTIONS The Single - wall Indirect connection labeled “To Boiler Return” should be piped to the boiler return piping[...]

32 Figure 2 - Water Boiler Piping with Zone Valves 2. For a space heating system that utilizes CIRC ULATORS, refer to Figure 3. The Single - wall Indirect connection labeled “FROM BOILER SUPPLY” should be piped to the boiler supply piping. Mount the circulator making sure the flow arrow points toward the water heater. The use of shut - off valv[...]

33 CONNECT STEAM BOILER SUPPLY PIPING Figure 4 represents a typical steam boiler connection diagram. Refer to the boiler in stallation manual or contact the boiler manufacturer for an appropriate piping diagram. The use of a union, shut - off valves, and a drain valve is recommended for future service convenience. The use of an in - line “Y” - [...]

34 SECTION VI ELECTRICAL CONNECTIONS Install electric wiring in accordance with National Electric Code or the Canadian Electrical Code and local regulations. See the boiler’s installation manual for wiring diagrams. The Single - wall Indirect is supplied with an aquastat temperature control. This aquastat must be installed in the aquastat well lo[...]

35 made to not r otate this dial while wiring the control. Once electrical connections are INTERNET VERSION FOR REFERENCE ONLY[...]

36 complete, secure the aquastat cover back in place. AT NO TIME SHOULD WATER HEATER OPERATION TAKE PLACE WITHOUT THE COVER ON THE CONTROL. Figure 5 - Aquastat Control INTERNET VERSION FOR REFERENCE ONLY[...]

37 SECTION VII OPERATING INSTRUCTIONS SYSTEM START - UP Follow boiler installation instructi ons to place boiler in operation. SEQUENCE OF OPERATIONS 1. Aquastat senses stored water temperature drops below desired setting. a. Domestic hot water priority only: Normally closed contacts open to interrupt space heating. 2. Aquastat satisfied. a. Aquast[...]

38 WATER TEMPERAT URE ADJUSTMENT 1. The aquastat controls the maximum water temperature in the tank. The differential is a fixed 5°F with a 160°F maximum setting, set at the factory to 120°F. Table 7 details the approximate relationship of water temperature and time with regard to scald injury and may be used as a guide in determining the safest[...]

39 INTERNET VERSION FOR REFERENCE ONLY[...]

40 2. For the most energy efficient op eration, adjust the aquastat for the minimum water temperature necessary to meet domestic hot water needs. Refer to Figure 7. Use a small flat screwdriver to rotate the temperature dial through the hole directly below the temperature indication window. The temperature setting is aligned with the notch in this [...]

41 sufficient water or allow the water heater to sit until a heat - up cycle is initiated. Repeat step 3. INTERNET VERSION FOR REFERENCE ONLY[...]

42 SECTION VIII MAINTENANCE The Single - wall Indirect is intended to provide a service life of many years. Components that require service, however, may be subject to failure. Failure to use the correct procedures or parts in these circumstances may make the water heater unsafe. The owner should arrange to have the fo llowing inspections and simpl[...]

43 If the temperature – pressure relief valve on the heater disc harges periodically or continuously, it may be due to thermal expansion of water in a closed water supply system, or it may be due to a faulty relief valve. Thermal expansion is the normal response of water when it is heated. In a closed system, thermal e xpansion will cause the sys[...]

44 discharge in an area wher e any remaining hot water will not cause any damage or injury. b. Open the drain valve to flush any sediment out of the bottom to the heater. c. Shut off the cold water supply. Make sure all hot water fixtures and circulating pumps are turned off. d. Wait for wate r flow from the hose to stop. Remove the anode using a s[...]

45 SECTION IX TROUBLE SHOOTING GUIDE PROBLEM CAUSE SOLUTION Refer to boiler installation instructions Check main service switch Boiler does not operate Check fused disconnect Check power supply Circulator does not operate Re place as necessary Improper aquastat setting or calibration Turn tank aquastat to appropriate setting Check power supply Zone[...]

46 TROUBLE SHOOTING GUIDE (CONT.) PROBLEM CAUSE SOLUTION Aquastat setting too low Adjust aquastat to higher setting. See Section VII Undersized boiler with no priority to domestic hot water R ewire for priority Peak use of hot water is greater than tank storage capacity Determine peak usage and compare to tank capacity Insufficient hot water Faulty[...]

47 SECTION X PARTS LIST PART NAME & DESCRIPTION 1. Aquastat Control 7. Drain Valve 2. Aquastat W ell 8. Jacket Head Pan 3. Anode 9. Hole Closure 4. Diptube 10. Heat Exchanger Escutcheon 5. Outlet Nipple 11. Escutcheon 6. T & P Relief Valve 12. Finish Flange INTERNET VERSION FOR REFERENCE ONLY[...]

48 Contact your supplier or plumbing professional for replacement parts or contact the company at the address given on the rating plate of the water heater. Provide the part name, model, and serial numbers of the water heater when ordering parts. READ THE WARRANTY FOR A FULL EXPLANATION OF THE LENGTH OF TIME THAT PARTS AND THE WATER H EATER ARE WAR[...]

49 Notes INTERNET VERSION FOR REFERENCE ONLY[...]