IBC IWT 40 (01) PDF Document

When using the IBC IWT 40, you should follow these precautions: Install or locate the water heater only in accordance with the provided installation instructions. Use the water heater only for its intended use. Close supervision is necessary when the appliance is used by children. Do not operate the water heater if it is not working properly, or if it has been damaged or dropped. Installation, start-up, and servicing must be performed by competent, qualified, licensed, and trained plumbing and heating technicians.

If you smell gas vapors, do not try to operate any appliance, do not touch any electrical switch, or use any phone in the building. Immediately call the gas supplier from a phone located remotely. Follow the gas supplier’s instructions, or if the supplier is unavailable, contact the fire department.

Water temperatures over 125 degrees Fahrenheit (52 degrees Celsius) can cause severe burns instantly or death from scalds. Children, the disabled, and the elderly are at the highest risk of being scalded. Always feel the water before bathing or showering. You may consider installing a point of source ASSE 1017 approved thermostatic mixing valve on the outlet of the IBC IWT 40 to help prevent scalding.

The IBC IWT 40 has a maximum operating pressure of 150 psi, a height of 45.2 inches (114.8 cm), and a maximum diameter of 22 inches (55.9 cm). It has a gross tank volume of 40 USG (151 Liters) and a net tank volume of 38.3 USG (145 Liters). The weight empty is 100 lbs (45.3 kg) and the shipping weight is 120 lbs (54.4 kg). It features a 3/4 inch M domestic connection size, a first hour delivery of 204 Gal/Hr, and a continuous draw of 170 Gal/Hr. The required boiler output is 120,000 Btu/Hr, with a minimum flow rate of 14 GPM, a heating coil pressure drop of 6.2 Ft. Hd., and a coil heat transfer area of 8.1 Ft2 (0.75 m2).

The recommended clearances for the IBC IWT 40 are as follows: Front: 1 inch (Distance from Combustibles), 24 inches (For Service). Rear, Right and Left Sides: 1 inch (Distance from Combustibles), 1 inch (For Service). Top: 1 inch (Distance from Combustibles), 1 inch (For Service). Bottom: 0 inches (Distance from Combustibles), 0 inches (For Service).

To drain the domestic water system, first shut off the cold water supply at the main shutoff valve. Open one or more faucets to relieve the pressure. Open the system drain, leaving the faucets open.

Step 1: Open all faucets to allow air to purge from the tank and piping. Remove screens on faucets.

Step 2: Open the domestic hot water shut-off valve.

Step 3: Slowly open the cold water inlet shut-off valve.

Step 4: Purge all of the air from the domestic water system.

Step 5: Allow the water to run so that you clear the tank of any debris. Run the water long enough so that it runs clear and to change at least one tank volume past full.

Step 6: Close all faucets.

Step 7: Reinstall all of the screens in the faucets.

Step 8: Check the system for leaks and repair as required.

First, flush the tank: Shut off the cold water supply to the IBC IWT 40. Make a note of the DHW temperature control setting, and turn off the power to the boiler and water heater. Reduce the water pressure in the tank by opening a hot water faucet. Remove the relief valve. Drain one-third of the water heater so that the tank is two-thirds full; the water level must cover the coil and the thermostat well. Using a funnel, pour one gallon of commercial ice maker cleaning solution into the tank through the relief valve opening, following the cleaning solution instructions. Turn on the power to the boiler and water heater. Program the control to its highest DHW temperature setting and allow the boiler to heat until the control is satisfied. If not satisfied after 45 minutes, program to its lowest temperature. Allow the solution to set for 30 minutes, then drain the tank completely.

Next, refill the tank: Fill the tank with fresh, cold water and drain it completely. To flush all cleaning solution, refill and drain at least three times. Reinstall the relief valve and drain piping. Open the cold water supply to fill the tank. Purge air by opening cold and hot faucets. Finally, return the DHW control setting to the original temperature.

Ensure the boiler power is on. Ensure the boiler is programmed for DHW and the water temperatures are set properly. Check the tank temperature on the screen; if it shows Open or Short, there is a sensor or wiring issue. If the water heater circulator does not operate, check that the pump relay is closed, the zone valve is open, the wiring connections are secure, and that there is 120VAC at the circulator during a call for heat. If the water heater zone valve does not open, check for 24VAC at the zone valve during a call for heat.