Intellihot iQ251 Operation And Installation Manual Download Page 1

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

 

N

ATURAL GAS

Dir

ect-V

ent Automa

tic Instantaneous 

Wat

er Hea

te

r

(Chauffe-eau automatique instantané à ventilation directe)

FOR INDOOR INST

ALLA

TION ONL

(POUR INSTALLATION À L'INTÉRIEUR SEULEMENT)

120 V

olt, 60 Hz, 5 

Amp

s

Ty

pe of Gas 

(Type de gaz)

:   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  

Input Rating 

(Entrer le Classement)

: Btu/hr Maximu

 .  .  .

 

 

 

 

 

 

   

 

 

 

 

 

 

Btu/hr Minimum   .  .  . 

Maximum Inlet Gas Pressure: 

.  .  .  .  .  .  .  .  .  .  .  . 

Minimum Inlet Gas Pressure:  

.  .  .  .  .  .  .  .  .  .  .  . 

Minimum Inlet Gas Pressure (for adjustments):  .  . 

Maximum 

Wa

ter Pressure:   

 .  .  .  .  .  .  .  .  .  .  .  .  .

Minimum 

Wa

ter Pressure:  

  .  .  .  .  .  .  .  .  .  .  .  .  . 

Recovery Rating:  

  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 

  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 

Thermal Effi

 ciency 

/ : 

Energy Factor:

NOx Emissions:   

  .  .  .  .  .  .  .  . 

(Pursuant to South Coast 

Air Quality Management District Rule 1

146.2)

(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 T

echnologies Inc

.

2900 W. Main St.
Galesburg, IL  61401

 

Phone: 

(877) 835- 1705

Email: 

[email protected]

We

b: 

www

.intellihot.com

Factor

y Pr

eset 

Na

tur

al 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 Co

nv

er

sion* 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

TURE

L

(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. Efficient. 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

Summary of Contents for iQ251

Page 1: ...er A rri re du ch au ffe e au Fr on t of he at er A va ntdu ch au ffe e au Bot to m of ca bi ne t C t ca na lis ation Sid e C t 5 8 in 1 5 8 m m 6 in 1 5 2 cm 6 in 1 5 2 cm 2 in 5 0 8 m m 12 in 3 0 4...

Page 2: ......

Page 3: ...ines 26 8 2 Water Quality 26 8 3 Hot Water Side Connection 26 8 4 Cold Water Side Connection 27 8 5 Condensate Line Installation 27 8 6 External Recirculation Options 28 9 Electrical 9 1 Electrical Co...

Page 4: ...for conversion procedure Se r f rer au manuel d installation et de fonctionnement pour la proc dure de conversion PR R GLAGES D USINE POUR UTILISATION AVEC GAZ NATUREL Pression de gaz d arriv e maximu...

Page 5: ...ll your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire or police department C Use only your hand to turn the manual gas...

Page 6: ...wn to have high acidity and or high hardness water treatment is recommended Consult the local water authority SAFETY INSTRUCTIONS DO NOT use this appliance if any part has been under water DO NOT reve...

Page 7: ...onitor Flue Temperature Monitor Blocked Vent Detector Water Shut Off Valve 2X10A Fuse Dual Flame Sensing Flue Damper 0 6 1 0 3 I S P x a M n i M e r u s s e r P r e t a W 6 Black Iron 2 1 e r u s s e...

Page 8: ...16 2 15 16 6 5 8 SIDE VIEW POWER CORD CONDENSATE DRAIN 2 3 4 2 7 16 8 7 8 13 1 2 14 7 16 2 15 16 4 5 8 7 13 16 TOP VIEW HOT WATER OUT COLD WATER IN FRESH AIR INTAKE 3 EXHAUST PORT 3 GAS INLET 3 4 NPT...

Page 9: ...NPT 5 Fresh Air Intake 3 O D 6 Access Ports for Blower Mounting Screws 7 Hot Water Supply Inlet Connection 3 4 Male NPT 8 Power Supply 9 Condensate Drain Connection 3 4 Nipple 3 4 flex hose 1 Using si...

Page 10: ...vel to an exterior wall a The exhaust vent outlet must not be located next to a walkway near soffit vents crawl space vents or other areas where condensate water vapor could cause damage or create a h...

Page 11: ...ounting bracket on the wall and ensure that it is level Use two appropriately sized wood screws to mount the bracket securely to the studs Ensure that it is affixed securely and can support the weight...

Page 12: ...e sum of the maximum inputs of each unit divided by the heat of combustion of the fuel supplied at the location use 1 030 BTU per cubic foot for natural gas and 2 520 BTU per cubic foot for propane b...

Page 13: ...cities are based on specific gravity of 0 6 pressure drop of 0 5 WC Pipe Sizes and BTU h Capacity Natural Gas Use this table for static gas pressure greater than 5 Length Including fittings 1 2 3 4 1...

Page 14: ...your location it may be necessary to install a gas pressure regulator to lower gas pressures to an acceptable level Please ensure that the gas pressure regulator has the same or higher minimum to maxi...

Page 15: ...the outside of the building All horizontal runs should be sloped upwards towards the vent termination at a rate of 1 4 per foot To avoid moisture and frost build up to openings on adjacent homes use...

Page 16: ...stem Direct Vent The water heater can be direct vented without any modification using a 3 inch diameter pipe The following diagrams represent some typical direct venting configurations and are include...

Page 17: ...67 Ventilation Air 50 100 67 250 000 Combustion Air 63 84 125 84 Ventilation Air 63 125 84 Where two openings are used one must be within 12 of the floor and the other opening must be within 12 of the...

Page 18: ...epresent some typical power venting configurations and are included to assist in designing the vent system Possible configurations are not limited to these designs Intake Air Intake Air Intake Air Int...

Page 19: ...72 inches 7 6 2 Roof Termination Venting the unit through the roof is also an option With this installation method the terminations must extend at least 12 over maximum potential snow levels or as req...

Page 20: ...ncentric Venting Termination Multiple Units In order to conform to some national codes when two or more water heaters are installed they must be individually vented When two or more units are vented n...

Page 21: ...ces to outside corner G Clearances to inside corner H Clearances to each side of centerline extended from meter regulator 3 feet within a height 15 feet above meter regulator assembly I Clearances to...

Page 22: ...each fitting used in the system A vent system s length must not exceed the maximum length outlined in the chart below Maximum Vent Length in ft for Power Vent 1 pipe Number of Units common vented toge...

Page 23: ...irections Use a 45 degree transition as shown Do not transition into a reducer or use a t fitting Transitions should always be directed into a straight run of pipe Do not use 90 degree transition into...

Page 24: ...out any modification using a 3 inch diameter pipe The following diagrams represent some typical direct venting configurations and are included to assist in designing the vent system Possible configura...

Page 25: ...ingle exhaust pipe power vent method the following table outlines the required opening sizes for the combustion and ventilation air coming into the room MAKE UP AIR MAKE UP AIR MAKE UP AIR MAKE UP AIR...

Page 26: ...r must be cleaned periodically to maintain proper water flow 8 2 Water Quality Proper maintenance of the water heater is required to ensure that your water meets EPA quality standards The following ta...

Page 27: ...fitting located on the bottom of the unit IQ 105 2 Follow applicable local codes and if required install in line neutralizer 3 to treat the acidic condensate Follow all the installation instructions i...

Page 28: ...LINE OPTION Cold Water Cold Ball Valve Union Pressure Relief Valve KEY Check Valve Optional Isolation Kit Optional Isolation Kit Note A pressure relief valve can be installed into the hot water isolat...

Page 29: ...e KEY Courtesy Grundfos Hot UNDER SINK VALVE OPTION 1 Cold Cold Optional Isolation Kit Optional Isolation Kit Hot Water Cold Water Courtesy Armstrong Astro Ball Valve Union Pressure Relief Valve KEY H...

Page 30: ...nal information 9 2 Electrical Connection and Polarity NOTICE POLARITY The plug provided with the unit is polarity sensitive Ensure that the line and neutral are at the correct locations in the wall s...

Page 31: ...onnected 3 Remove the front cover and locate the main circuit board 4 Locate DIP Switch 1 and change it to the PROPANE position IN 30 PROPANE PROPANE NATURAL NATURAL GAS GAS PROPANE NATURAL GAS SW1 Pr...

Page 32: ...for nominal conditions Variables such as gas pressure heating value of the gas and the humidity and temperature of combustion air can all impact CO and CO2 values Changes in these variables can resul...

Page 33: ...CO Recorded Values Hi Adjusted Hi Lo Adjusted Lo CO2 Value Max CO ppm Date 10 Press the Down arrow key to let the unit fire at low fire 11 Record values in table column 3 Lo If the CO2 values are with...

Page 34: ...tton to set the hours and minutes on the clock F Mode button Press this button to access various Modes of Operation G Set button Used to view real time flow and temperature readings H Displays the cur...

Page 35: ...correctly advanced the time to either the AM or PM hour setting 5 Press and release the Time button again The colon between the hours and minutes should now be flashing indicating the time has been pr...

Page 36: ...gallons per minute after which the words Flue along with the flue temperature will appear followed by the word Tout water outlet temperature These three screens will continue to cycle as long as the...

Page 37: ...release the Mode button multiple times until the desired screen shows on the display rS Burner Rate Ramp Setting Ft Fuel Type CO Adjust CO2 Level CE Common Exhaust FP Flue Pipe Type 2 Follow the instr...

Page 38: ...one of the ten possible selections 01 02 03 though 10 The up down arrows scroll from OFF to 1 through 10 and then to OFF 4 Once the desired number is selected press and hold the Enter button for three...

Page 39: ...display will return to the home screen 13 2 4 Diagnostic Code and Error Log Selection This screen provides the technician with Diagnostic Codes and Errors recorded as the water heater operates These c...

Page 40: ...screen 13 2 6 Fuel Type Verification The Fuel Type mode screen shows the selected fuel type natural gas factory preset or Propane Operation with natural gas is factory preset Refer to the Propane LPG...

Page 41: ...turn to the home screen 13 2 9 Flue Pipe Selection PVC or CPVC Changing this setting can only be done when the Flame ON icon is not displayed WARNING When the unit is set for CPVC or polypropylene pip...

Page 42: ...or other container under the heat exchanger inlet 4 Remove the clip holding the line into the heat exchanger Allow the water to drain from the heat exchanger IQ 036 5 When all the water has drained fr...

Page 43: ...ectrical noise dsi Replace part Adjust gas pressure at regulator check upsize gas line check for gas line blockage If the problem persists turn control panel OFF shut gas valve unplug unit and contact...

Page 44: ...erature exceeded set limit Flow rate changes excessive Faulty sensor wiring Faulty sensor Faulty Controller Ensure the water flow rate does not change faster than 2 GPM every 5 seconds Check for nicke...

Page 45: ...D RED Cascading Connectors ON Dip Switch SW1 NG LP Green LED POWER Electrode Red LED Burner ON orange orange ON OFF Dip Switch SW3 Heat Exchanger Outlet Temp tout Flue Temp tflue Not Used Not Used Inl...

Page 46: ...46 15 3 Operational Diagram IQ 35...

Page 47: ...47 16 Serviceable Parts 16 1 Electrical Components 1 2 3 ITEM NO PART NUMBER DESCRIPTION 1 IGT SPR0004 DISPLAY 2 IGT SPR0002 CONTROLER 3 IGT SPR0005 IGNITER MODULE...

Page 48: ...010 iQ250 iQ250D HEAT EXCHANGER INLET FITTING 2 IGT SPR0012 iQ250 iQ250D HEAT EXCHANGER OUTLET FITTING 3 IGT SPR0013 HEAT EXCHANGER OUTLET LINE SS 4 IGT SPR0019 iQ250D INLET KIT 5 IGT SPR0020 HEAT EXC...

Page 49: ...d Exhaust 1 2 4 3 ITEM NO PART NUMBER DESCRIPTION 1 IGT SPR0017 iQ250 iQ250D FLUE PIPE ASSEMBLY PP 2 IGT SPR0016 iQ250 GAS INLET ASSEMBLY 3 IGT SPR0008 iQ250 iQ250D BLOWER ASSEMBLY 4 IGT SPR0011 iQ250...

Page 50: ...50 16 4 Ignition Components 1 2 ITEM NO PART NUMBER DESCRIPTION 1 IGT SPR0006 ELECTRODE KIT 2 IGT SPR0005 IGNITER MODULE...

Page 51: ...roperty owner to secure the services of qualified licensed professionals for the installation of hard wired carbon monoxide detectors a In the event that the side wall horizontally vented gas fueled e...

Page 52: ...a heat exchanger coil when installed in a commercial application including recirculation or any space heating application is six 6 years from the effective start date All other Parts and Components T...

Page 53: ...urpose provided however that implied warranties or merchantability and fitness for a particular purpose are not disclaimed during the one year period from the effective date Intellihot shall not be li...

Page 54: ...54 NOTES...

Page 55: ...________________________ ________________________ Owner Information Name _____________________________________________ Address ___________________________________________ City State Postal Code ______...

Page 56: ......

Page 57: ......

Page 58: ...cm 6 in 1 5 2 cm 2 in 5 0 8 m m 12 in 3 0 4 cm 5 8 in 1 5 8 m m 6 in 1 5 2 cm 2 in 5 0 8 m m 1 2 in 1 2 7 m m 12 in 3 0 4 cm In te llihot Gre en Te ch nolo gies In c 29 00 W Main St Gales burg IL 61 4...

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