Pilot Flame Characteristics

The correct flame will be blue and will extend beyond the thermocouple. The flame will surround the thermocouple just below the tip. A slight yellow flame may occur where the pilot flame and main burner flame meet.

2.Blow air pressure through the holes indicated by the arrows. This will blow our foreign materials such as dust, lint and spider webs. Tighten nut B also by grasping nut A.

Figure 13

Oxygen Depletion Sensor Pilot (Figure 14)

When the pilot has a large yellow tip flame, clean the Oxygen Depletion Sensor as follows:

1.Clean the ODS pilot by loosening nut B from the pilot tubing. When this procedure is required, grasp nut A with an open end wrench.

Figure 14

Warning:

Never use needles, wires, or similar cylindrical objects to clean the pilot to avoid damaging the calibrated ruby that controls the gas flow.

THERMOSTAT OPERATION

To ignite main burner, turn gas control knob counterclockwise toward HI setting. To shut down main burner, turn gas control knob clockwise toward LO setting.

The SR-10Thas an input of 10,000 BTUH (2.9KW/H). The hydraulic thermostat bulb is located at the casing assembly bottom. When the hydraulic thermostat bulb senses the need for heat, the unit cycles “ON” at a full input rate of 10,000 BTUH (2.9KW/H). The unit remains at this full input rate until the hydraulic thermostat bulb is “satisfied.” When the hydrau- lic thermostat bulb is “satisfied” the burner will shut “OFF” with the pilot flame remaining “ON.”

The SR-18Thas an input of 18,000 BTUH (5.3KW/H). The hydraulic thermostat bulb is located at the casing assembly bottom. When the hydraulic thermostat bulb senses the need for heat, the unit cycles “ON” at a full input rate of 18,000 BTUH (5.3KW/H). The unit remains at this full input rate until the hydraulic thermostat bulb is “satisfied.” When the hydrau- lic thermostat bulb is “satisfied” the burner will shut “OFF” with the pilot flame remaining “ON.”

Note: The burner does not modulate between “ON” and the pilot flame. When the SR-18T is “ON,” all three ceramic plaques will “glow.” There will never be a time when only one or two ceramic plaques are “glowing.”

The SR-30Thas an input of 30,000 BTUH (8.8KW/H). The hydraulic thermostat bulb is located at the casing assembly bottom. When the hydraulic thermostat bulb senses the need for heat, the unit cycles "ON" at a full input rate of 30,000 BTUH

(8.8KW/H). The unit remains at this full input rate until the hydraulic thermostat bulb is "satisfied." When the hydraulic thermostat bulb is "satisfied" the burner will shut "OFF" with the pilot flame remaining "ON."

Note: The burner does not modulate between "ON" and the pilot flame. When the SR-30T is "ON," all five ceramic plaques will "glow." There will never be a time when only one or three ceramic plaques are "glowing."

The LO and HI setting has temperature range of approximately 55°F (12.78°C) to 90°F (32.22°C), respectively. This is the temperature at the hydraulic thermostat bulb not the room tem- perature. The owner is advised to determine the particular heat setting that is desired for comfort, as heating requirements are different for every owner.

Attention: If the owner does not want the main burner to ignite and turns the gas control knob to the LO setting, the main burner will still ignite if the temperature at the hydraulic thermostat bulb drops to 55°F (12.78°C).

If no heat is desired, turn the gas control knob to the PILOT position.

Main Burner Operation

Description of Gas Control Knob:

OFF position.

PILOT position.

LO/HI will allow the hydraulic thermostat bulb to cycle the heater ON and OFF.

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