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Intellihot iQ250D - User Manual

Intellihot iQ250D
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To avoid product damage, personal injury, or
even possible death, carefully read, understand,
and follow all the instructions in the Installation
and Operation manuals before installing this
product. Improper installation, adjustment, alteration, or
maintenance can cause injury, loss of life, and/or property
damage. This water heater should be installed and
serviced by a qualified technician. The lack of proper
service can result in a dangerous condition.
This manual contains safety information, installation
instructions, and maintenance procedures. It must be left
with the homeowner or placed near the water heater in
a noncombustible place. The customer should retain this
manual for future reference.
WARNING
If the information in these instructions is not followed
exactly, a fire or explosion could result causing
property damage, personal injury, or death.
— Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use
any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call the
fire department.
— Installation and service must be performed by
a qualified installer, service agency, or the gas
supplier.
FA
CT
OR
Y PRESET FOR USE WITH
NATURAL GAS
Dir
ect-Vent Automatic Instantaneous
Wat
er Heater
(Chauffe-eau automatique instantané à ventilation directe)
FOR INDOOR INSTALLATION ONLY
(POUR INSTALLATION À L'INTÉRIEUR SEULEMENT)
120 V
olt, 60 Hz, 5 Amps
Type of Gas
(Type de gaz)
: . . . . . . . . . . . . . . . .
Input Rating
(Entrer le Classement)
: Btu/hr Maximu
m . . .
Btu/hr Minimum . . .
Maximum Inlet Gas Pressure: . . . . . . . . . . . .
Minimum Inlet Gas Pressure: . . . . . . . . . . . .
Minimum Inlet Gas Pressure (for adjustments): . .
Maximum Water Pressure: . . . . . . . . . . . . .
Minimum
Water Pressure: . . . . . . . . . . . . .
Recovery Rating: . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . .
Thermal Effi ciency / : Energy Factor:
NOx Emissions:
. . . . . . . .
(Pursuant to South Coast Air Quality Management District Rule 1146.2)
(Moins de 20 ppm)
(Jusqu'à 98 % / 0.94) (Jusqu'à 98 % / 0.94)
(Moins de 20 ppm)
(Dégagements minimums)
(Des non-combustibles)
(D'une construction
combustible)
(conformément au règlement 1146.2 du "South Coast Air Quality Management District)
Top of heater
Minimum Clearances
From
Non-Combustibles
From Combustible
Construction
(Dessus du chauffe-eau)
Back of heater
(Arrière du chauffe-eau)
Front of heater
(Avantdu chauffe-eau)
Bottom of cabinet
(Côté canalisation)
Side (Côté)
5/8 in (15.8 mm)
6 in (15.2 cm)
6 in (15.2 cm)
2 in (50.8 mm)
12 in (30.4 cm)
5/8 in (15.8 mm)
6 in (15.2 cm)
2 in (50.8 mm)
1/2 in (12.7 mm)
12 in (30.4 cm)
Intellihot Green Technologies Inc
.
2900 W. Main St.
Galesburg, IL 61401
Phone: (877) 835- 1705
Email:
info@intellihot.com
Web: www.intellihot.com
Factor
y Preset
Natural Gas
(Réglage en usine pour gaz naturel)
199,000
20,000
13.0 W.C. (3.20 kPa)
8.0 W. C. (2.00 kPa)
8.0 W. C. (2.00 kPa)
150 psi (1034 kPa)
15 psi (103 kPa)
265 GPH (1003 LPH)
Up to 98% / 0.94
Less than 20 ppm
Field Conv
ersion* to
Pr
opane Gas
(Conversion* sur place au gaz propane)
199,000
20,00
0
10.5
W.
C. (2.62 kPa)
3.0 W.
C. (0.76 kPa)
11.0
W.
C. (2.74 kPa)
150 psi (1034 kPa)
15 psi (103 kPa)
265 GPH (1003 LPH)
Up to 98% / 0.94
Less than 20 ppm
Check
Box if
Converted to
Propane
Gas
*Refer to Installation and Operation
manual for conversion procedure.
(Se référer au manuel d'installation et
de fonctionnement pour la procédure de
conversion.)
PRÉRÉGLAGES D'USINE POUR UTILISATION AVEC
GAZ NA
TUREL
(Pression de gaz d'arrivée maximum)
(Pression d'eau maximum)
(Pression d'eau minimum)
(Caractéristique de recouvrement)
(Efficacité thermique / Facteur énergétique)
(Émissions de NOx)
(Pression de gaz d'arrivée minimum)
(Pression de gaz d'arrivée minimum (pour ajustements))
Cocher la case si converti au gaz propane
ETL STICKER
Serial Number:
IGT-LBL-0005-01
(Numéro de série)
(Collant ETL)
Operation and
Installation
Manual
Model: iQ250D
This product complies with ANSIZ21.10.3
(2011) / CSA 4.3 Gas Water Heater. For use as
portable water heating.
Smart. Ecient. Endless
— Ne pas entreposer ni utiliser d’essence ou
ni d’autres vapeurs ou liquides inflammables
à proximité de cet appareil ou de tout autre
appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ
•
Ne pas tenter d’allumer d’appareil.
•
Ne touchez à aucun interrupteur; ne pas vous
servir des téléphones se trouvant dans
le bâtiment.
•
Appelez immédiatement votre fournisseur de gaz
depuis un voisin. Suivez les instructions
du fournisseur.
•
Si vous ne pouvez rejoindre le fournisseur,
appelez le service des incendies.
— L’installation et l’entretien doivent être assurés
par un installateur ou un service d’entretien
qualifié ou par le fournisseur de gaz.
AVERTISSEMENT
Assurez-vous de bien suivre les instructions données
dans cette notice pour réduire au minimum le
risque d’incendie ou d’explosion ou pour éviter tout
dommage matériel, toute blessure ou la mort.
Certified to
NSF/ANSI 372

Table of Contents

Questions and Answers

  • S
    Samantha MorganAug 14, 2025
    Why does my Intellihot Water Heater have ignition failure?
    • B
      Brian LarsonAug 14, 2025
      If your Intellihot Water Heater is experiencing ignition failure, it could be due to several reasons. First, the water over-heat switch might have tripped, in which case you should check the pump and cross over solenoid, also consider electrical noise. Other potential causes include a faulty DSI, igniter wire, ignition connection, PCB, or a bad igniter, requiring a replacement of the part. Low gas pressure could also be the culprit; try adjusting the gas pressure at the regulator, checking or upsizing the gas line, and inspecting for gas line blockages. If the problem persists, turn the control panel OFF, shut the gas valve, and unplug the unit, then contact an authorized service technician.
  • F
    Francisco Nelson DDSAug 17, 2025
    What to do if my Intellihot Water Heater shows a blocked flue fault?
    • T
      Tara PowersAug 18, 2025
      If your Intellihot Water Heater shows a blocked flue fault, the exhaust might be obstructed by something like a bird. Inspect the exhaust termination and connection at the water heater, and consider installing screens. Another cause could be backed-up condensate; check the slope of the drain and look for double loops, air locks, or debris in the loop. Also, check the wiring, as a loose connection could trigger the fault.
  • D
    Daniel CamposAug 21, 2025
    Why does my Intellihot Water Heater show 'Flue Temperature Exceeded Set Limit'?
    • T
      Tina HartmanAug 21, 2025
      If the flue temperature on your Intellihot Water Heater exceeds the set limit, it could be due to several factors. First, verify that the vent pipe material is correctly set in the FP (Flue Pipe) mode if you're using CPVC or Polypropylene. High inlet temperature can also cause this issue; ensure it's below 150°F for PVC vents or 190°F for CPVC or Polypropylene vents. Check for nicked or broken sensor wiring and connectors, as well as any corrosion or moisture. You may also need to measure the sensor's resistance at the connector (18 Kohm at 50°F, 10 Kohm at 77°F, 3 Kohm at 140°F). If none of these steps resolve the problem, the controller might be faulty and require replacement.
  • A
    Amanda BrownAug 25, 2025
    What causes Heat Exchanger outlet temperature exceeded set limit in Intellihot Water Heater?
    • B
      Brian BennettAug 25, 2025
      If the heat exchanger outlet temperature on your Intellihot Water Heater exceeds the set limit, it could be due to excessive flow rate changes. Ensure the water flow rate doesn't change faster than 2 GPM every 5 seconds. Also, check for any damaged sensor wiring or corroded connectors. Measure the resistance of the sensor at the connector (18 Kohm at 50°F, 10 Kohm at 77°F, 3 Kohm at 140°F). If the issue persists, the controller may be faulty and require replacement.
  • Y
    yharrisAug 28, 2025
    How to fix a Temperature Sensor Shorted error on my Intellihot Water Heater?
    • C
      Carrie MillerAug 28, 2025
      If your Intellihot Water Heater indicates a temperature sensor shorted, it could be due to faulty sensor wiring. Check for nicked or broken sensor wiring or connectors, and also look for corroded or wet connectors. Another possibility is a faulty sensor; measure its resistance at the connector (18 Kohm at 50°F, 10 Kohm at 77°F, 3 Kohm at 140°F). If the issue relates to the heat exchanger water outlet, flue, or inlet water temperature sensor, consider replacing the controller. A faulty controller can also cause this issue, so replacing it might be necessary.
  • N
    Nicholas JonesAug 31, 2025
    What causes a Temperature Sensor Open Circuit in Intellihot Water Heater?
    • R
      Ryan SmithAug 31, 2025
      If your Intellihot Water Heater shows a temperature sensor open circuit error, start by checking the connectors to ensure they are securely connected. Inspect the sensor wiring for any nicks or breaks, and look for corroded or wet connectors. If the wiring seems fine, measure the resistance of the sensor at the connector (18 Kohm at 50°F, 10 Kohm at 77°F, 3 Kohm at 140°F). If the problem persists, it could be related to the heat exchanger water outlet, flue, or inlet water temperature sensor, which may require replacing the controller. A faulty controller itself can also cause this issue, necessitating its replacement.
  • C
    Christian PrinceSep 3, 2025
    How to troubleshoot a Blower Speed Fault on an Intellihot Water Heater?
    • B
      Brian ChambersSep 3, 2025
      If your Intellihot Water Heater is experiencing a blower speed fault, it could be due to a noisy or jammed blower. Inspect the blower and impeller, cleaning and removing any obstructions. Another potential cause is a disconnected signal wire; check the PWN signal and look for loose wires or pins, repairing as necessary. If the wiring is faulty, again check the PWN signal and repair any loose wires or pins. If the problem persists, turn the control panel OFF, shut the gas valve, unplug the unit, and contact an authorized service technician.
  • L
    Lindsay FletcherSep 7, 2025
    What does a flashing cascade icon mean on my Intellihot Water Heater?
    • A
      Amy BatesSep 7, 2025
      If the cascade icon is flashing on your Intellihot Water Heater, it indicates a loss of communication between units. Check the communication cable for breaks or nicks and ensure the connector is secure. Make sure the communication cable isn't bundled with high voltage lines. Verify the dip switch (SW3) is ON in the first and last units and OFF in all other units. Also, ensure each unit numbering is unique under the dC mode.
  • T
    Tamara WellsSep 10, 2025
    What to do if the icon is flashing on my Intellihot Water Heater?
    • J
      Jeffrey GallegosSep 12, 2025
      If you see a flashing icon on your Intellihot Water Heater, it means there's an error code and the unit has locked out. To resolve this, refer to the specific error code (E1, E2, etc.) indicated.

Intellihot iQ250D Specifications

General IconGeneral
ModeliQ250D
CategoryBoiler
Heating Capacity250, 000 BTU/h
Input BTU/h250, 000 BTU/h
Output BTU/h250, 000 BTU/h
Fuel TypeNatural Gas or Propane
Thermal Efficiency95%
Warranty10 years
Voltage120V
Water Connection Size3/4 inch
Temperature Range120°F to 180°F
Vent Diameter3 inch

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