IBC IWT 80-MAX (01) PDF Document

The IBC IWT 80-MAX has the following specifications:

Max. Operating Pressure: 150 psi

Height: 64.5 inches / 163.8 cm

Max. diameter: 24.5 inches / 62.2 cm

Water temperature for rated output: 180°F / 82°C

Gross tank capacity: 79.3 USG / 300 Liters

Net tank capacity: 75.0 USG / 284 Liters

Weight (empty): 188 Lbs / 85 kg

Shipping weight: 201 Lbs / 91 kg

Domestic connection size: 1.5 inch M

First hour delivery: 719 Gal/Hr

Continuous Draw: 653 Gal/Hr

Boiler Output Required: 420,000 Btu/Hr

Minimum flow rate: 25 GPM

Heating coil pressure drop: 16.7 ft. hd

Coil Heat Transfer Area: 26.9 ft. squared / 2.5 m squared

To flush and clean the tank of the IBC IWT 80-MAX:

Step 1. To avoid water damage, shut off the cold water supply to the water heater.

Step 2. Make a note of the DHW temperature control setting on the IBC control, and turn off the power to the boiler and water heater.

Step 3. To reduce the risk of scalding, reduce the water pressure in the tank by opening a hot water faucet.

Step 4. Remove the relief valve from the water heater.

Step 5. Drain 1/3 of the water heater so that the tank is two-thirds full. The water level must cover the coil and the thermostat well.

Step 6. Using a funnel, pour one gallon of commercial ice maker cleaning solution into the tank through the relief valve opening. Follow the instructions, cautions, and warnings supplied with the cleaning solution.

Step 7. Turn on the power to the boiler and water heater.

Step 8. Program the IBC control to its highest DHW temperature setting, and allow the boiler to heat the water until the control is satisfied.

Step 9. If the boiler control is not satisfied after 45 minutes of operation, program the IBC DHW control setting to its lowest temperature.

Step 10. Allow the heated solution to set in the tank for 30 minutes.

Step 11. Drain the tank completely using fittings and hoses, as required, to reach a drain.

After cleaning the IBC IWT 80-MAX, follow these steps to refill:

Step 1. Fill the water heater tank with fresh, cold water and drain it completely.

Step 2. To flush all of the cleaning solution from the tank, refill and drain at least three times.

Step 3. Reinstall the relief valve and the drain piping.

Step 4. Open the cold water supply, and fill the tank with water.

Step 5. Purge the air from the tank and the piping by opening the cold and hot water faucets in the house.

Step 6. Return the IBC DHW control setting to the temperature noted before the procedure began.

The required clearances for the IBC IWT 80-MAX 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 inch distance from combustibles, 0 inch for service.

If there is no hot water at the faucets when using the IBC IWT 80-MAX, check the following:

If the boiler does not operate: Ensure boiler power is on. Ensure the boiler is programmed for DHW and the water temperatures are set properly. Check the tank temperature on the IBC screen for an Open or Short sensor or wiring issue.

If the Water Heater Circulator does not operate: Follow the steps for when the boiler does not operate. Ensure the pump relay is closed and supplying power to the pump. Ensure the zone valve is open and the end switch is closed calling for heat. Check wiring connections at the circulator. Measure voltage at the circulator during a call for heat; it should be 120VAC. If power is at the circulator and connections are correct, replace the circulator.

If the water heater zone valve does not open: Follow steps for when the boiler does not operate. Check for 24VAC at the zone valve while there is a call for heat; if correct voltage is available and connections are good, replace the zone valve.

If the tank sensor is open, short, or mis-wired: Ensure the tank sensor is connected to the correct terminals and the wires are properly attached to the terminal strip and the sensor is properly attached to the wiring at the tank. Disconnect the sensor wires from the terminal strip and measure the resistance in Ohms across the 2 sensor wires. Compare this value to the resistance table and the actual tank temperature. Repeat this test for the sensor only and compare the results. Check/replace the wire from the boiler to the sensor or replace the sensor.

If the water at the faucets is too cool, the DHW temperature setting may be too low. Increase the DHW Tank Set Point temperature on the IBC IWT 80-MAX.

If the water at the faucets is too hot, consider the following:

The DHW temperature setting may be too high; reduce the DHW Tank Set Point temperature.

The boiler Maximum Supply Temp. setting may be too low; make sure the Maximum Supply Temp. setting is at least 10 degrees F higher than the DHW Supply Setpoint plus 1/2 of the Supply Diff’l Temp setting.

If the DHW temperature sensor is giving a false reading, check if the sensor is not fully inserted into the well, if the sensor is giving an incorrect resistance reading, if the sensor is connected to the wrong terminals, or if an improper 3rd party sensor is installed in the well.

Perform the following maintenance on the IBC IWT 80-MAX:

Boiler and Domestic Water Piping: Check all piping for signs of leakage at the joints, unions and shut-off valves. Repair as required. (Frequency: Annually)

Temperature and pressure relief valve: Check for leaks or corrosion. (Frequency: Annually)

Sediment: Depending on water conditions, sediment may collect in the tank. If the recovery rate is reduced, flush the tank. (Frequency: Annually, more frequently in hard water areas)

Scale: Hard water may cause scale buildup. If flushing does not resolve issues, chemical cleaning may be required. (Frequency: Annually)