Intellihot i200 Compact Wall Hung Tankless Water Heater User Guide
- June 13, 2024
- Intellihot
Table of Contents
Intellihot i200 Compact Wall Hung Tankless Water Heater
Maintenance
Cleaning the Inlet Water Strainer
- All the water heaters are equipped with a sediment strainer on the inlet water connection.
- Initially, this strainer should be inspected and cleaned every three months to establish a cleaning schedule.
-
Turn OFF the electrical power.
-
Position a container under the strainer on the water inlet pipe. The container must be large enough to hold the volume of water contained in the pipe coming to the water heater.
-
Close the water inlet and outlet valves (arrow) and remove the strainer’s plug. Allow the water to drain from the pipe.
Note: If a water shut-off valve was not installed, shut OFF the main water supply valve. -
Remove the strainer screen, clean it, and reinstall it in the housing.
-
Replace the strainer’s plug.
Draining the Water Heater
CAUTION
Hot water can cause burns to the skin. The water temperature is factory set to
120°F (49°C). To avoid burns, make sure the water heater is OFF and the power
supply is disconnected. The water heater will remain hot for some time. Wait
until the unit has completely cooled before draining the water heater or
performing any other maintenance.
-
Press the Power button to turn OFF the water heater. Disconnect the electrical power.
-
Close the water supply inlet and outlet valves. The valve is closed typically when the handle is perpendicular to the pipe, as shown in the illustration.
-
Remove the front cover panel. Place a container or other method to retain/divert the water under the heat engine inlet.
Note: The water heater contains approximately one-half gallons of water. Make sure there is enough capacity to contain or divert the water from inside the water heater cabinet. -
Remove the clip holding the pipe into the heat engine. Flex the pipe enough to allow the water to drain from the heat engine.
Note: Do not allow the water to pool or stand in the bottom of the water heater cabinet. Remove any spilled water with a clean, dry cloth. -
When all the water has drained from the water heater, replace the pipe and the clip.
Filling the Water Heater
- Open the hot water outlet valve. Slowly open the cold water inlet valve.
- Open a hot water faucet. Once a steady stream of water flows and all the trapped air is purged from the system, close the hot water faucet.
- Plug the unit into an electrical power supply.
- Open a hot water faucet. The water heater should operate normally.
Wiring Diagrams and Troubleshooting
Operational Flow Chart
Complete Wiring Diagram (all models)
Troubleshooting Guide
| Description | Possible Cause | Remedy |
|---|
| ****
• Blower noisy / impeller jammed.
• Disconnected signal wire.
• Wiring faulty.
| ****
• Inspect the blower/impeller. Clean and remove any obstructions.
• Check the PWN signal. Check for loose wires/pins, and repair.
• If the problem persists, turn the control panel OFF, shut OFF the gas valve, disconnect power from the unit, and contact an authorized service technician.
| ****
• Water overheat switch tripped.
• Faulty DSI, faulty igniter wire, faulty ignition connection, faulty PCB, bad igniter.
• Low gas pressure.
• Wiring faulty.
| ****
• Check the pump, cross-over solenoid, and for electrical noise (DSI).
• Replace part.
• Adjust gas pressure at regulator, check/increase the size of the gas pipe, and check for gas pipe blockage.
• If the problem persists, turn the control panel OFF, shut OFF the gas valve, disconnect power from the unit, and contact an authorized service technician.
| ****
• Unplugged connectors.
• Faulty sensor wiring.
• Faulty sensor.
• Heat engine water outlet temperature sensor.
• Flue temperature sensor.
• Inlet water temperature sensor.
• Faulty controller.
| ****
• Check connectors and ensure they are securely connected.
• Check for nicked or broken sensor wiring or connectors. Also, check for corroded or wet connectors.
• Measure resistance of sensor at connector (18 Kohm at 50°F, 10 Kohm at 77°F, 3 Kohm at 140°F).
• Replace controller.
| ****
• Faulty sensor wiring or faulty sensor.
• Inlet water temperature sensor.
• Heat engine water outlet temperature sensor.
• Faulty controller.
| ****
• Check for nicked or broken sensor wiring or connectors. Also, check for corroded or wet connectors.
• Measure resistance of sensor at connector (18 Kohm at 50°F, 10 Kohm at 77°F, 3 Kohm at 140°F).
• Replace controller.
| ****
• Flow rate changes excessively.
• Faulty sensor wiring.
• Faulty sensor.
• Faulty controller.
| ****
• Ensure the water flow rate does not change faster than 1 GPM every five seconds.
• Check for nicked or broken sensor wiring or connectors. Also, check for corroded or wet connectors.
• Measure resistance of sensor at connector (18 Kohm at 50°F, 10 Kohm at 77°F, 3 Kohm at 140°F).
• Replace controller.
| Description | Possible Cause | Remedy |
|---|
| ****
• Incorrect vent setup.
• High inlet temperature.
• Faulty sensor wiring.
• Faulty sensor.
• Faulty controller.
| ****
• If the vent pipe material is CPVC or polypropylene, ensure that CPVC is selected in the vent material screen.
• Ensure inlet temperature is lower than 150°F if the vent pipe material is PVC or lower than 190°F if the vent pipe material is CPVC or polypropylene.
• Check for nicked or broken sensor wiring and connectors. Also, check for corroded or wet connectors.
• Measure resistance of sensor at connector (18 Kohm at 50°F, 10 Kohm at 77°F, 3 Kohm at 140°F).
• Replace controller.
| ****
• Exhaust blocked (bird, etc).
• Backed up condensate.
• Wiring loose (switch open).
| ****
• Check exhaust termination. Check the exhaust connection at the water heater. Install screens to prevent blockage.
• Check the slope of the drain. Check for double loops, airlocks, or debris in the loop.
• Check wiring.
| ****
• Unplugged connectors.
• Faulty sensor wiring.
• Faulty sensor.
• Flue temperature sensor.
• Inlet water temperature sensor.
• Faulty controller.
| ****
• Check connectors and ensure they are securely connected.
• Check for nicked or broken sensor wiring or connectors. Also, check for corroded or wet connectors.
• Measure resistance of sensor at connector (18 Kohm at 50°F, 10 Kohm at 77°F, 3 Kohm at 140°F).
• Replace controller.
| ****
• Loss of communication between units.
| ****
• Check for broken or nicked communication cables or loose connectors.
• Ensure that the communication cable is not bundled or tied to any high- voltage lines.
• Ensure the dip switch (SW3) is ON in the first and last units and OFF in all other units.
• Ensure each unit numbering is unique.
| ****
• Faulty sensor wiring.
• The water valve is damaged or the inlet strainer is clogged.
| ****
• Check for nicked or broken sensor wiring or connectors. Also, check for corroded or wet connectors.
• Replace the water valve and/or clean the strainer.
| ****
• Incorrect settings.
• Incompatible settings.
• Incorrect software version.
• Faulty wiring.
| ****
• Review and correct settings.
• Review and correct settings.
• Update software version.
• Check for nicked or broken sensor wiring or connectors. Also, check for corroded or wet connectors.
| Description | Possible Cause | Remedy |
|---|
| ****
• A system alert is present (main menu screen).
• Malfunction of monitored part or system.
| ****
• Refer to the remedy for the indicated part or system.
| ****
• A fault or error is present (main menu screen).
• Malfunction of monitored part or system.
| ****
• Refer to the remedy for the indicated part or system.
| ****
• An alert, fault, or error is present (active screen).
• Malfunction of monitored part or system.
| ****
• Refer to the remedy for the indicated part or system.
| ****
• Shows the status of the water heater.
• Sleep mode.
• Sleep mode passcode protected.
• Indicates a service problem exists within the monitored parts.
• Indicates an alert exists within the monitored systems.
• Indicates a fault exists within the monitored parts or system.
| ****
• Touch the display screen to wake.
• Touch the display screen to wake up and enter a passcode.
• Refer to the remedy for the indicated part or system.
• Refer to the remedy for the indicated part or system.
• Refer to the remedy for the indicated part or system.
Serviceable Parts
Electrical Components
Item Part Number Description
- 1IGT-SPR0005 Igniter Module (DSI)
- 2IGT-SPR0002 Control Board
- 3IGT-SPR0089 Small Screen Display Kit
- 4IGT-SPR0065 Transformer
Water Line
Item Part Number Description
- 5 IGT-SPR0018 Water Inlet Fitting
- 6 IGT-SPR0003 Flow Sensor Kit (Water Valve)
- 7 IGT-SPR0010 Heat Exchanger Inlet Fitting
- 8 IGT-CST0029 Side Cast
- 9 IGT-SPR0012 Water Outlet Fitting
Blower, and Gas Valve
Item Part Number Description
- 10 IGT-SPR0008 Blower Kit
- 11 IGT-ELC0012 Blower Adapter Plate
- 12 IGT-ELC0147 Gray Swirl Plate
- 13 IGT-ELC0020 Gas Valve Harness
- 14 IGT-SPR0011 Gas Valve Kit
- 15 IGT-SPR0097 High Temp Sensor
- 16 IGT-SPR0110 Sensors Kit
- 17 IGT-SPR0066 Resettable Switch
- 18 IGT-SPR0106 Electrode Kit
Exhaust & Air Intake
Item Part Number Description
- 19 IGT-EX0002 Air Intake
- 20 IGT-EX0001 Exhaust
- 21 IGT- CST0029 Side Cast
Miscellaneous
|
---|---
Part Number| Description
IGT-ELC0092| 25 ft cascading cable
IGT-ELC0232| 50 ft cascading cable
IGT-SPR0109| O-Ring Kit
IGT-SPR0110| Sensors Kit
IGT-ELC0181| DSI to Electrode HV Cable
IGT-ELC0289| Display Harness
IGT-ELC0015| Wiring Harness
IGT-SPR0111| Burner Kit
i200 / i250 Maintenance September 2017 – Revision 00