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Accessories & Replacement Parts

Overview

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.

Features

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.

Product Specifications

Dimensions (in.): 3.2 in. wide x 4.9 in. high x 4.1 in.long
Dimensions (mm): 81 mm wide x124 mm high x 104 mm long.
Includes: Natural to LP Conversion Kit
Item Type: Product
Mounting: 0 to 90 degrees in any direction from the upright position of the gas control knob, including vertically.
Electrical Ratings: 24 Vac
Frequency: 60 Hz
Approvals, Canadian Standards Association: CSA International: 112395
Tradeline Value: Universal
Flame Failure Response Time (sec): 1.6 sec @ 3 µA
PrePurge: 15 seconds
PostPurge: 30 seconds
Ambient Temperature Range (C): -40 C to +79 C
Ambient Temperature Range (F): -40 F to +175 F
Ignition System Type: Intermittent Hot Surface Pilot Ignition
Ignition Sequence: Intermittent Pilot
Type of Gas: Natural
Flame Sense: HSI
Ignition Source: Pilot
Ignition Trials To Lockout: continuous retry
Ignition Trial Time (sec): 90 sec
Typical Ignition Hardware: Q3450; Q3480
Body Pattern: Straight-through
Opening Characteristics: Standard 2-stage
Pressure Regulator Setting (psi): 1.7 in. WC low; 3.2 in. WC high
Pressure Regulator Setting (kPa): 0.42 kPa low; 0.80 kPa high
Pressure Ratings (psi): 1/2 psi
Pressure Ratings (kPa): 3.5 kPa
Inlet/Outlet Size (in.): 1/2 in. NPT x 1/2 in. NPT
Pilot Gas Outlet: Yes
Capacity (ft³/hr): Maximum at 1 in. P.D.--150 ft³/hr; Maximum--200 ft³/hr; Minimum--20 ft³/hr
Capacity (m³/hr): Maximum at 1 in. P.D.--4.2 m³/hr; Maximum--5.7 m³/hr; Minimum--0.6 m³/hr
Pressure Tapping: 1/8 in. - NPT