i250 Gen II - Water heaters and boilers Intellihot - Free user manual and instructions
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| Product Type | Tankless Water Heater and Boiler |
| Model | i250 Gen II |
| Brand | Intellihot |
| Dimensions (H × W × D) | 30.1 × 17.5 × 11.6 inches (765 × 445 × 295 mm) |
| Weight (empty) | 85 lbs (38.6 kg) |
| Power Input (NG/LP) | 199,000 BTU/h |
| Thermal Efficiency | 96% (condensing) |
| Flow Rate | 9.8 GPM (37 L/min) at 45°F rise |
| Ignition | Electronic hot surface ignition |
| Venting | Direct vent (PVC/CPVC/Stainless steel), up to 100 ft equivalent |
| Water Connections | 3/4 inch NPT in/out |
| Gas Connection | 3/4 inch NPT |
| Electrical Requirements | 120 VAC, 60 Hz, 1.5 A |
| Control System | Digital display with self-diagnostics |
| Warranty | 10 years on heat exchanger, 5 years on parts |
| Safety Features | Freeze protection, flame failure lockout, overheating protection |
| Maintenance | Annual descaling and air filter cleaning recommended |
| Repairability | Modular components; user-replaceable parts include igniter, blower, and control board |
| Certifications | ANSI Z21.10.1, CSA 4.1, and Energy Star qualified |
Frequently Asked Questions - i250 Gen II Intellihot
What is the recommended water pressure for the i250 Gen II?
The recommended water pressure range is 30 to 80 psi (207 to 552 kPa). If pressure exceeds 80 psi, install a pressure reducing valve.
Can the i250 Gen II be used for both space heating and domestic hot water?
Yes, the i250 Gen II is designed for both space heating and domestic hot water applications when properly configured with a storage tank or buffer.
How do I perform annual maintenance on my Intellihot water heater?
Annual maintenance includes flushing the heat exchanger with a descaling solution (e.g., vinegar or citric acid), cleaning the air filter, and checking the ignition system. Refer to the manual for detailed steps.
What type of venting material is required?
The i250 Gen II requires schedule 40 PVC, CPVC, or polypropylene for venting. Stainless steel (AL29-4C) may be used for longer runs. Do not use galvanized steel.
Why is my water heater not igniting?
Common causes include a blocked vent, gas supply shut off, or a faulty hot surface igniter. Check the error code on the display and consult the troubleshooting section of the manual.
What is the maximum length of vent pipe allowed?
The maximum equivalent vent length is 100 ft (30.5 m) for 2-inch pipe and 150 ft (45.7 m) for 3-inch pipe. Elbows reduce allowable length.
Does the i250 Gen II have a built-in recirculation pump?
No, the i250 Gen II does not include a recirculation pump, but it can be used with an external pump for instant hot water systems.
What is the minimum flow rate required to activate the heater?
The minimum flow rate to activate the heater is 0.5 GPM (1.9 L/min). Below this, the heater will not fire.
How do I reset the water heater after a fault?
To reset the unit, turn the power off for at least 10 seconds and then restart. If the fault persists, note the error code and contact a qualified technician.
What is the cold weather performance of the i250 Gen II?
The unit has built-in frost protection down to -30°F (-34°C) when installed indoors. For outdoor installations, use a winter cover and ensure proper insulation.
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USER MANUAL i250 Gen II Intellihot
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Product information
Brand : Intellihot
Model : i250 Gen II
Category : Water heaters and boilers