INDIRECT WATER HEATER Installation and Operating Instruction Manual CAUTION Maximum supply temperature to heat exchanger must not exceed 180°F (82°C). Safety Warning: Indirect water heaters are heat-producing appliances. To avoid damage or injury, there must be no materials stored against the indirect water heater and proper care shall be taken to avoid unnecessary contact (especially by children) with the indirect water heater.
TABLE OF CONTENTS page GENERAL INFORMATION .................................................. INSTALLATION .................................................................... WATER CONNECTIONS...................................................... Potable Water....................................................................... Heat Exchanger ................................................................... ELECTRICAL CONNECTIONS ............................................ OPERATION.................
GENERAL INFORMATION The warranty on this indirect water heater is in effect only when it is installed, adjusted, and operated in accordance with these instructions. The manufacturer will not be held liable for any damage resulting from alteration and/or failure to comply with these instructions. Special Note: Operation of this product at temperatures exceeding those herein may cause irreparable damage and will nullify the warranty.
INSTALLATION Locating The Indirect Water Heater The location of the indirect water heater is of the utmost importance. Before installing this appliance, select a location that is accessible to water lines and the hot water supply system where the floor is level. Do not locate the indirect water heater where water lines could be subjected to freezing temperatures. We recommend that you locate the indirect water heater near the center of greatest hot water usage to prevent heat loss through the pipes.
Locating The Water Heater continued- NOTE: Before proceeding with the installation, close the main water supply valve, open a water faucet to relieve the house pressure, and then close the faucet. If replacing an existing water heating appliance be sure to turn off all electrical current, heating fluid and/or gas supply to the existing appliance. A combination sacrificial anode/hot water outlet nipple has been installed to extend tank life.
Water Connections continued- IMPORTANT FAILURE TO INSTALL AND MAINTAIN A NEW, LISTED 3/4” X 3/4” TEMPERATURE-PRESSURE RELIEF VALVE WILL RELEASE THE MANUFACTURER FROM ANY CLAIM WHICH MIGHT RESULT FROM EXCESSIVE TEMPERATURE AND PRESSURES. If this water heater is installed in a closed water supply system, such as one having a back-flow preventer in the cold water supply, provisions must be made to control thermal expansion.
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 a hot water system served by this water heater that has not been used for a long period of time (generally two weeks or more). Hydrogen gas is extremely flammable. 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- Heat Exchanger (see figure 1) WARNING The internal heat exchanger and its’ components contained in this appliance are designed for a maximum working pressure of 150 p.s.i. (1034 kPa) and a maximum supply temperature of 180°F (82°C). THESE LIMITS MUST NOT BE EXCEEDED UNDER ANY CIRCUMSTANCES. Irreparable damage to the heat exchanger will occur which will nullify the warranty. Before plumbing the heat exchanger inlet or outlet, remove the plastic plugs from the fitting(s).
ELECTRICAL CONNECTIONS Before any electrical connections are made, be sure that the water heater is full of water and that the manual shut-off valve in the cold water supply line is open. Check the rating plate and wiring diagram before proceeding. All wiring shall be done in accordance with all applicable local and state codes. The thermostat incorporates a manual reset temperature-limiting device. Please refer to the Service section for operation of the manual reset.
Electrical connections continued- If a circulator is used to control the heating fluid flow, wire the thermostat from the indirect water heater to interrupt one leg of the circulator. For example, a 110 volt circulator should have the hot leg (usually the black wire) wired through the indirect thermostat. This will enable the indirect thermostat to control the circulator. This should be used if the boiler is actuated by flow. Other installations may require slightly different wiring arrangements.
Figure 2 OPERATION Before closing the switch to allow electric current to flow to the water heater, make certain that the water heater is full of water and that the cold water inlet valve is open. Complete failure of the heating elements will result if they are not totally immersed in water at all times. When the switch is closed, the operation of this electric water heater is automatic.
TO DRAIN THE HEATER Should it become necessary to completely drain the water heater, make sure you follow the steps below: 1. Disconnect the power supply to the heater. Consult the plumbing professional or electric company in your area for service. 2. Close the cold water supply shut-off valve. 3. Open the drain valve on the water heater by turning the knob counterclockwise. The drain valve has threads on the end that will allow connection of a standard hose coupling. 4.
DANGER Hotter water increases the risk of scald injury. Scalding may occur within five (5) seconds at a temperature setting of 140°F (60°C). To protect against hot water injury, install an ASSE approved mixing valve in the water system. This valve will reduce point of discharge water temperatures by mixing cold and hot water in branch water lines. A licensed plumbing professional or local plumbing authority should be consulted.
Maintenance continued- The following 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 water heater. Regular inspection and maintenance of the water heater will help to insure safe and reliable operation. 1. Annually, check the operation of the thermostat(s). 2.
Maintenance continued- consumption. More frequent inspection of the anode is needed when using softened (or phosphate treated) water. CAUTION FOR YOUR SAFETY, DO NOT ATTEMPT TO REPAIR THERMOSTAT(S), HEATING ELEMENTS, OR ELECTRICAL WIRING. REFER SUCH REPAIRS TO A QUALIFIED SERVICE TECHNICIAN. Contact your local plumbing supplier or plumbing professional for replacement parts or contact the company at the address displayed on the rating plate of the water heater.
