IBC IWT 80 (01) PDF Document

The specifications for the IBC IWT 80 are as follows:

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 volume: 79.3 USG / 300 Liters

Net tank volume: 77.4 USG / 293 Liters

Weight: 166 Lbs / 75 kg

Shipping weight: 193 Lbs / 87.5 kg

Domestic conn. size: 1 inch M

First hour delivery: 356 Gal/Hr

Continuous Draw: 287 Gal/Hr

Boiler Output Required: 200,000 Btu/Hr

Minimum flow rate: 14 GPM

Heating coil pressure drop: 10.1 Ft. Hd.

Coil heat transfer area: 13.8 Ft2 / 1.28 m2

To chemically clean the heating coil of your IBC IWT 80, first flush the tank by following these steps:

1. Shut off the cold water supply to the IBC IWT 80.

2. Note the DHW temperature control setting, and turn off the power to the boiler and the IBC IWT 80.

3. Reduce the water pressure in the tank by opening a hot water faucet.

4. Remove the relief valve from the IBC IWT 80.

5. Drain one third of the IBC IWT 80 so that the tank is two thirds full. The water level must cover the coil and the thermostat well.

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

7. Turn on the power to the boiler and the IBC IWT 80.

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

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

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

11. Drain the tank completely using fittings and hoses to reach a drain.

After flushing, refill the tank by: 1. Filling the IBC IWT 80 tank with fresh, cold water and draining it completely. 2. Refilling and draining at least three times to flush all cleaning solution. 3. Reinstalling the relief valve and drain piping. 4. Opening the cold water supply and filling the tank. 5. Purging air from the tank and piping by opening hot and cold faucets. 6. Returning the DHW control setting to the original temperature.

If there is no hot water at the faucets with your IBC IWT 80, perform these troubleshooting steps:

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 screen for an open, short, or sensor/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 see 120VAC. If power is at the circulator and connections are correct, replace the circulator.

If the water heater zone valve does not open: Follow the steps for when the boiler does not operate. Check for 24VAC at the zone valve while there is a call for heat; if the 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 IBC IWT 80. 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 chart and the actual tank temperature. Repeat this test for the sensor only and compare the results. Check or replace the wire from the boiler to the sensor or replace the sensor.

To test the temperature sensor of your IBC IWT 80, measure the temperature of the sensed environment and compare it with the value derived from the resistance measurement of the sensor. Obtain the resistance by connecting a high quality test meter capable of measuring up to 5,000 kOhm at the controller end of the sensor lead.

To obtain a resistance reading, first remove power to the boiler. Disconnect the sensor leads from the terminal strip. Do not grip the sensor leads in your hands or place them on a conductive surface. Place multi-meter probes onto the bare wire ends of the leads and obtain the reading. Compare the reading with the actual sensor temperature and the resistance values listed in the temperature sensor resistance table.

The recommended maintenance for the IBC IWT 80 is as follows:

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

Temperature and pressure relief valve: Annually check for leaks or corrosion.

Sediment: Annually, or more frequently in hard water areas, draw water from the drain valve until it runs clear if you notice a small temperature difference between the boiler supply and return lines, or a reduced recovery rate.

Scale: Annually, check for scale buildup on the outside of the heating coil inside the tank. If repeated flushing does not resolve the issue, chemical cleaning may be required.

To install a field-supplied aquastat on the IBC IWT 80, follow these steps:

1. Carefully bend the capillary tube/sensing bulb so that it is at a right angle to the back of the control.

2. Loosen the mounting screw and carefully insert the sensing bulb into the well until the control mounts to the well head.

3. Tighten the screw to lock it in place.

4. Connect wires sized for the voltage being used to the aquastat terminals.

5. Set the aquastat to the correct temperature by adjusting the dial so the desired temperature is at the pointer.

6. Set the aquastat to the lowest practical setting to meet the consumer needs.

The required clearances from the heater jacket for the IBC IWT 80 are as follows:

Front: 1 inch from combustibles, 24 inches for service.

Rear, Right and Left Sides: 1 inch from combustibles, 1 inch for service.

Top: 1 inch from combustibles, 1 inch for service.

Bottom: 0 inches from combustibles, 0 inches for service.