ASME COMMERCIAL ELECTRIC WATER HEATER A Spanish language version of these instructions is available by contacting the company listed on the rating plate. La versión espãnola de estas instructiones se puede obtener al escribible a la fábrica cuyo nombre aparece en la placa de especificaciones. INSTALLATION & OPERATING INSTRUCTION MANUAL THE WARRANTY ON THIS WATER HEATER IS IN EFFECT ONLY WHEN THE WATER HEATER IS INSTALLED AND OPERATED IN ACCORDANCE WITH LOCAL CODES AND THESE INSTRUCTIONS.
TABLE OF CONTENTS General Information ................................................... 3 Installation ............................................................... 4 Locating The Water Heater ............................................. 4 Water Connections ........................................................ 6 Electrical Connections .................................................... 13 Amperage Chart .......................................................... 14 GPH Recovery Capacities...........
GENERAL INFORMATION This electric w ater heater’ s design is certified by Underw riters Laboratories (UL) and listed in accordance w ith UL 1453. C-UL listed in accordance w ith Canadian National Standard C22.2, No. 110-M90. This w ater heater must be installed in accordance w ith local codes. In the absence of local codes, install this w ater heater in accordance w ith the latest edition of the National Electrical Code.
General Information continued- A sacrificial anode(s) is used to extend tank life. Removal of any anode, except for inspection and/or replacement, will nullify the warranty. In areas where water is unusually active, an odor may occur at the hot water faucet due to a reaction between the sacrificial anode and impurities in the water. If this should happen, an alternative anode(s) may be purchased from the supplier that installed this water heater. This will minimize the odor while protecting the tank.
Locating The Water Heater continued- Water heater corrosion and component failure can be caused by the heating and breakdow n of airborne chemical vapors. Examples of some typical compounds that are potentially corrosive are: spray can propellants, cleaning solvents, refrigerator and air conditioning refrigerants, sw imming pool chemicals, calcium or sodium chloride, w axes and process chemicals.
Water Connections Note: Before proceeding with the installation, close the main water supply valve. After shutting the main w ater supply valve, open a faucet to relieve the w ater line pressure in order to prevent w ater from leaking out of the pipes w hile making the w ater connections to the w ater heater. After the pressure has been relieved, close the faucet. The cold w ater inlet line connects to the inlet nipple at the base of the w ater heater.
Water Connections continued- WARNING For protection against excessive temperatures and pressure, install temperature and pressure protective equipment required by local codes, but not less than a combination temperature and pressure relief valve certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment or materials, as meeting the Requirements for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems, ANSI Z21.
Water Connections continued- WARNING Hydrogen gas can be produced in the hot water system served by this water heater when there has been no usage for a long period of time (generally two weeks or more). Hydrogen gas is extremely flammable. Therefore, to reduce the risk of injury under these conditions, it is recommended that the hot water faucet be opened for several minutes at the kitchen sink before using any electrical appliance connected to the hot water system.
Water Connections continued- Figure 1 9
Water Connections continued- Figure 2A (Dual Temperature System With Mixing Valve) 50A, 80A, 120A Figure 2B (Dual Temperature System With Mixing Valve) 6A, 12A, 20A, 30A, 40A 10
Water Connections continued- Figure 3A (Single Installation With Storage Tank Gravity Circulation) 50A, 80A, 120A Figure 3B (Single Installation With Storage Tank Gravity Circulation) 6A, 12A, 20A, 30A, 40A 11
Water Connections continued- Figure 4A (Dual Water Heater Installation) 50A, 80A, 120A Figure 4B (Dual Water Heater Installation) 6A, 12A, 20A, 30A, 40A 12
Electrical Connections Before any electrical connections are attempted, be sure the w ater heater is full of w ater and that the manual shut-off valve in the cold w ater supply line is open. Heating elements, w hich have been energized for a very short period of time, can be damaged (burned-out) if they are not completely immersed in w ater. This w arranty does not cover burnedout heating elements. Check the rating plate and w iring diagram before proceeding.
Amperage Chart kW Input 3 6 9 12 13.
GENERAL OPERATION Before closing the sw itch to allow electric current to flow to the w ater heater, make certain that the w ater heater is full of w ater and that the cold w ater inlet valve is open. Complete failure of the heating elements w ill result if they are not totally immersed in w ater at all times. When the sw itch is closed, the operation of this electric w ater heater is automatic. The temperature control knob located on the side on the control box is factory preset to 120° F (49° C).
Thermostat adjustment continued- DANGER Hotter w ater increases the risk of scald injury. Scalding may occur w ithin five (5) seconds at a temperature setting of 140° F (60° C). To protect against hot w ater injury, install an anti-scald tempering valve in the w ater system. This valve w ill reduce point of discharge w ater temperatures by mixing cold and hot w ater in branch w ater lines. A licensed plumbing professional or local plumbing authority should be consulted.
Maintenance continued- The follow ing maintenance should be performed by a qualified service technician at the minimum periodic intervals suggested below . In some installations, the maintenance interval may be more frequent depending on the amount of use and the operating conditions of the w ater heater. Regular inspection and maintenance of the w ater heater w ill help to insure safe and reliable operation. 1. Annually, check the operation of the thermostat(s). 2.
Maintenance continued- 7. If this w ater heater is equipped w ith fuses, before removing any fuse, disconnect the all pow er to the w ater heater. Open the control box door and replace fuses according to the size indicated on the w iring diagram affixed to the inside of the control box door. CAUTION FOR YOUR SAFETY, DO NOT ATTEMPT TO REPAIR THERMOSTAT(S), HEATING ELEMENTS, OR ELECTRICAL WIRING. REFER SUCH REPAIRS TO A QUALIFIED SERVICE TECHNICIAN.
SERVICING GUIDE This ‘‘ Servicing Guide‘‘ section of this Installation and Operation Installation manual is provided for the purpose of improving the effectiveness and the efficiency of servicing this w ater heater. This information is intended to assist qualified service personnel. Servicing of this w ater heater may require know ledge of electrical testing instruments. If you are unfamiliar or unsure of the electrical circuits or the testing instruments, consult a qualified electrician.
Servicing Guide continued- Certain other control components are available as ‘‘ Optional‘‘ . When these optional components are installed w ith the w ater heater, the control circuit w iring diagram accordingly w ill include these components.
Servicing Guide continued- The follow ing unusual situations w ill give reason for the pressure controls to interrupt the electrical current to the coil of the contactor: • Upon installation or occasions of re-starting heater operation, if the inlet supply line is closed (i.e. a shut-off valve), the high pressure limit may be exceeded due to reasons of thermal expansion of the w ater. • If during the operation of the w ater heater the inlet line is closed (i.e.
Servicing Guide continued- When installing the control refer to the direction of the arrow on the hex and insure that it is pointing upw ards. If it is not pointing upw ard, the control sw itch w ill not activate w hen the tank is refilled w ith w ater. Refer to Figure 7 for clarification. Figure 7 Alarm Horn The Alarm Horn is an option specified w hen the installation desires an audible signal to immediately sound an alert w hen the w ater heater operation is interrupted for certain faults.
Servicing Guide continued- The follow ing unusual situations w ill give reason for the alarm to sound: • If a High Pressure Control is installed, upon installation of the w ater heater or occasions of re-starting w ater heater operation, if the inlet supply line is closed (i.e. a shut-off valve), the high pressure may be exceeded due to reasons of thermal expansion of the w ater. • If a Low Pressure Control is installed and if during the operation of the w ater heater the inlet line is closed (i.e.
Servicing Guide continued- Electrical Door Lock: An electrical door lock is offered in order to secure the access to the w ater heater control cabinet. This device w ill lock the control cabinet door w hen the 120VAC control circuit voltage is applied to it. Note: Once the door is opened, the w ater heater can be re-energized, if necessary, for service diagnosis.
