1/2" NPT, Intermittent HSI Pilot, Standard Opening SmartValve, NG/LP


Brand: Honeywell

Mfr Part#: SV9541Q2561

Availability: In Stock
Usually ships: within 1 business day
Qty Price
$191.95 / each & Free Shipping
x3 $560.85 / box & Free Shipping
(3 x $186.95 / each)
  • Description
  • Literature
  • Reviews
  • FAQs

The SmartValve System Controls combine gas flow control and electronic intermittent pilot sequencing functions into a single unit. The Q3450 or Q3480 Pilot hardware supplies the low voltage igniter, flame sensor and pilot burner. These ignition system controls provide all gas ignition safety functions by controlling gas flow, ignition source, and a 120 Vac or 240 Vac combustion air blower. The controls also monitor the appliance airflow proving switch and limit string to assure proper appliance operation, and provide prepurge, postpurge, and timed trial for pilot ignition with 100 percent shutoff and Continuous Retry. Includes a diagnostic LED indicates system status.


  • These controls communicate directly with an electronic fan timer (ST9160 Electronic Fan Timer for single stage applications;
  • ST9162 Electronic Fan Timer for two-stage applications) in typical forced warm air furnace applications;
  • It can directly interface with the appropriate power supplies and a system thermostat for additional appliance applications;
  • When controlled directly by a thermostat, these controls do not provide a postpurge function, because power to the control is removed when the thermostat call for heat ends;
  • The Systems are suitable for a wide range of fan-assisted combustion gas-fired appliances including furnaces, rooftop furnaces, boilers, unit heaters, infrared heaters, water heaters and commercial cooking appliances.

Technical Specifications:

  • Electrical Ratings: 24 Vac;
  • Frequency: 50 Hz; 60 Hz;
  • Flame Failure Response Time: 1.6 sec @ 3µA;
  • PrePurge: 15 seconds;
  • Ambient Temperature Range: -40°F to +175°F (-40°C to +79°C);
  • Ignition System Type: Intermittent Hot Surface Pilot Ignition;
  • Ignition Sequence: Intermittent Pilot;
  • Type of Gas: Natural;
  • Flame Sense: Two Rod;
  • Ignition Source: Pilot;
  • Ignition Trials To Lockout: Continuous Retry;
  • Ignition Trial Time (sec): 90 seconds;
  • Body Pattern: Straight-through;
  • Opening Characteristics: Standard Opening 2-stage;
  • Pressure Regulator Setting: 1.7in. wc (0.42 kPa) low, 3.2in. wc (0.80 kPa) high;
  • Pressure Ratings: 1/2 psi (3.5 kPa);
  • Inlet/Outlet Size (in.): 1/2" NPT x 1/2" NPT;
  • Pilot Gas Outlet: Yes;
  • Maximum Capacity: 200 ft³/hr (5.7 m³/hr), 150 ft³/hr (4.2 m³/hr) @ 1in. P.D.;
  • Minimum Capacity: 20 ft³/hr (0.6 m³/hr);
  • Approvals: CSA International;
  • Dimensions (Width x Height x Length): 3.2" x 4.9" x 4.1" (81mm x 124mm x 104mm);
  • Includes: LP Conversion Kit;
  • Mounting: 0° to 90° in any direction from the upright position of the gas control knob, including vertically;
  • Voltage: Call for heat 24 Vac, 60 Hz;
  • Pressure Tapping: 1/8" - NPT.
No reviews yet
Indicate an email address where you wish to receive the answer to your question.
Enter numbers shown above without spaces. This step helps us to prevent automatic submissions.
The following was added to your shopping cart: ×

Forgot Your Password?

Enter your e-mail address below.
You will receive an e-mail
with password reset instructions.


Estimate Delivery Date & Cost

Ship to Zip Code:
Qty (Optional):