Bradford-White Corp 9kW manuale d’uso

Commer cial Electric W ater Heaters 9kW – 900kW Input Models CHP-I&S-01 INST ALLA TION AND SER VICE MANUAL 1 If the inf ormation in this manual is not f ollo w ed exactl y , a f ir e or explosion ma y r esult causing property damage, personal injury or loss of life . Do not stor e or use gasoline or other flammable v apors and liquids in the [...]

2 CONTENTS Star t-Up Pr ocedur e Filling the W ater Heater . . . . . . . . .22 Start-Up Checks . . . . . . . . . . . . . . .23 Shutdo wn Procedure . . . . . . . . . . . .24 Maintenance T&P Relief V alve . . . . . . . . . . . . . .24 W ater Chemistr y . . . . . . . . . . . . . . .25 Flushing the T ank . . . . . . . . . . . . . .25 Sediment Remo [...]

3 FIG. 2 F ront Vie w V ertical Squar e Models FIG. 1 Fr ont V iew V er tical Round Models FIG. 3 F ront Vie w Horizontal Models[...]

T o minimize the possibility of serious personal injury , f ir e or damag e to y our appliance , ne v er violate the follo wing safety rules. 1. Alw a ys keep the ar ea around y our appliance fr ee of combustib le materials, gasoline, and other flammable liquids and v apors. 2. Ne ver co ver y our appliance, lean an ything against it, stor e trash [...]

3. The appliance must be installed so that the electrical components are protected from w ater (dripping, spraying, etc.) during appliance operation and service (replacing of fuses, elements, etc.) 4. Appliances located in a garage or parking structure shall be installed so that the jacket and all piping shall be located or protected so that it is [...]

Right Side - 6" (15cm) (24" (0.61m) for high kW vertical square models with an additional control panel on right side) Rear - 0" Left Side - 0" F r ont - 36" (0.91m) for service access to controls and heating elements To p - 12" (30cm) for service access to electrical ser vice, w ater connections and piping W ater Pipe[...]

7 Maintain minimum specif ied clearances for adequate operation. All installations must allo w suf f icient space for servicing the electrical components, w ater pipe connections, piping and other auxiliary equipment, as well as the appliance. Multiple appliances ma y be installed in a modular w ater heater installation. Multiple appliances ma y be[...]

Before making an y connections to the cold w ater inlet or hot w ater outlet, insure that all piping is clean and free of material or scale. This can usually be accomplished b y “ blo wing out the pipe. ” Any foreign material or scale entering the w ater heater can adversel y af fect operation and performance. Inlet and Outlet Connections F or [...]

discharg e! Hydro gen gas can be produced in a hot water system that has not been used for a long period of time (generall y tw o weeks or more). Hydro gen gas is extremel y flammable. T o prev ent the possibility of injury under these conditions, we recommend the hot w ater f aucet be open for se veral minutes at a sink close to the w ater heater [...]

initial operation. Operation of a w ater heater without a completel y f illed tank ma y result in serious damage to the appliance and heating element burn out. 5. The w ater heater should be connected with a separate grounded branch circuit with o ver cur rent protection and disconnect s witch. The w ater heater should be g rounded in accordance wi[...]

The follo wing items are a vailab le as extra cost options. • Electronic lo w w ater cut-off pre vents energizing of the heater w hen it is not f illed with w ater . • Pilot lights – Monitor on-of f cycle of contactors. • Manual limiting switches with indicating lights to permit heater kW input to be manuall y limited as desired. • T empe[...]

Each internal pow er circuit is fused for safety . Each po w er circuit to an immersion element is fused at a maximum of 48 amps. P o w er circuits ma y be fused at lo w er cur rent lev els as needed to balance cur rent on three phase units. The po w er circuit fuses are held b y a spring loaded fuse block rated for the v oltage specif ied to opera[...]

This w ater heater uses an immersion thermostat(s) to activ ate magnetic contactors allo wing cur rent to flo w to the immersion heating elements. The standard control system uses one immersion thermostat for each 54kW of electric heating po w er in a water heater . As an option, additional immersion thermostats may be pro vided to add additional s[...]

The maxim um temperatur e setpoint that should be set f or the Immersion Thermostats or pr ogrammed into the Electr onic T emperatur e Contr ol Sequencer is 190 ° F ( 88 ° C) Al wa ys close the electrical control panel door after making a temperature adjustment. T ur n on electricity . 1. T ur n “ OFF ” the electrical po w er to the water hea[...]

The w ater heater uses an optional adjustable electronic temperature control to pro vide staged ON/OFF control of the electric heating elements. Operation is based on temperature input from an immersion temperature sensor . The sensor is a positi ve coef f icient platinum thermistor . The sensor is placed in a w ell located abo ve the heating eleme[...]

Once po w er is applied to the temperature controller the displa y will countdo wn from 210 until the displa y reads zero. All outputs are de-energized at this time. This countdo wn process will repeat each time main po w er is inter rupted. T o av oid vie wing this entire countdo wn, press the Select ke y . The displa y will no w sho w nor mal rea[...]

Stag e Set P oint Differ ential 1 12 5 ˚ F 2 ˚ F 2 12 3 ˚ F 2 ˚ F 3 12 1 ˚ F 2 ˚ F 4 12 0 ˚ F 2 ˚ F Re-pro g ram the set points and dif ferentials to meet your system hot w ater requirements. The operating control uses a Liquid Crystal Displa y for interactiv e prompting during pro g ramming and displa y of sensed and assigned set point and[...]

FIG. 21 High W ater T emperatur e Limit Contr ol - Fixed Setting ERROR MESSAGES DISPLA YED BY THE ELECTRONIC TEMPERA TURE CONTROL There are se ven er ror messages that can be displa yed in response to softw are or hardware problems with the boiler ’ s inter nal electronic temperature control. The er ror codes that ma y be seen flashing on the dis[...]

The high limit contr ol will not r eset until the water temper ature has dr opped belo w the set point of the high limit. r eset multiple times. The source of the problem must be found and cor rected to insure proper operation. The limit control is co vered with an insulation blank et which must be remo ved to push the red reset button. The blanket[...]

This w ater heater may be equipped with an optional electronic lo w w ater cut-off installed at the factor y . This lo w water cut-of f device uses a w ater lev el sensing probe located abo ve the heating element installed in the highest point in the storage tank. If the internal water le vel drops belo w this point, the lo w water cut-of f will sh[...]

electrical input of the w ater heater in the summer months when ground w ater temperatures are w ar mer and full electrical input from the immersion heating elements is not required. The w ater heater may be restored to full input b y mo ving the s witches to the “ ON ” position. The w ater heater may be pro vided with an optional time clock. T[...]

The cold w ater supply m ust be left in the open position when the w ater heater is in use. An alarm bell with silencing switch is a vailab le as an option on this w ater heater . The alarm bell can be used to pro vide an audib le indication of a control sensed malfunction. The user must specify the safety function or multiple safety functions that[...]

6. While the tank is f illing, open the electrical control panel and set the thermostat(s) to the desired w ater temperature. If equipped with multiple thermostats, all individual thermostats may be adjusted to the same temperature set point or they ma y be set a 2 ° F to 4 ° F (1 ˚ C to 2 ˚ C) apart to step the elements on in stages. 7. Insure[...]

4. Close and lock the electrical control panel door . 5. T urn on the main electrical pow er to the w ater heater . 6. T emperature control and contactor operation should be checked b y allo wing the water heater to come up to temperature and shut of f automaticall y . 7. The w ater heater is no w ready continuous normal operation. Draining the W a[...]

should be metallic pipe or a high temperature plastic pipe (CPVC, etc.) to insure that hot w ater flo w will not damage the discharge piping from the relief v alve. In hard w ater areas, water treatment should be used to reduce the introduction of minerals to the system. Minerals in the w ater can collect in the storage tank and on the immersion he[...]

All gask ets on disassembled clean-out openings m ust be r eplaced with new g askets on r e-assembl y . Gaskets ar e a v ailab le from y our distributor . Scale accumulation in the bottom of the storage tank ma y be remo ved b y tur ning of f main po w er and draining the tank. Once all w ater is remo ved , the hand hole access can be remo ved. Thi[...]

27 TROUBLE SHOOTING Checklist Before calling for service, check the following points to see if the cause of trouble can be identif ied and cor rected. Revie wing this checklist ma y eliminate the need of a ser vice call and quickl y restore hot water service. Not enough or no hot w ater 1. Ensure that the electrical disconnect s witch serving the w[...]

CP-5M-5/02-Reprinted in U .S.A. Excessi ve w ater pressure is not the most common cause of relief v alve leakage. It is often caused b y a “ closed system. ” A check valve, back flo w pre venter or pressure reducing v alve, in the inlet system will not permit the expanded hot water volume to equalize pressure with the main. A relief v alve must[...]