Bosch Appliances HDS252U Test the Installation, Test Electric Ignition, Test/Adjust Flame

Models: HDS252U HDS256U HDS255U

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Step 6: Test the Installation

Step 6: Test the Installation

1. Test Electric Ignition.

Turn on power at breaker. If LCD screen flashes and beeps continuously, the wiring is incorrectly installed. Immediately disconnect power at breaker and return to step 4: CONNECT RANGE CORD.

Select a rangetop burner knob. Push down and turn to the flame symbol. If the ignitor/spark module is operating cor- rectly, it will produce a clicking sound. Once the air has been purged from the supply lines, the burner should light within four (4) seconds. After burner lights, turn knob to the off position.

Test each rangetop burner in this fashion.

Call Bosch Service (800-944-2904) if any of the burners do not light.

Some yellow streaking is normal during the

initial start-up.

Allow unit to operate 4-5 minutes and re- evaluate before making adjustments.

2. Test/Adjust Flame.

High Setting:

The combustion quality of the flame for each burner must be visually inspected. For propane, the flame should be blue with yellow tips. For natural gas, it should be soft blue in color. The flame should carry over, or surround, the entire burner and should not lift or blow off the burner.

To inspect, turn the burner on. See Figure 14 for appropriate flame characteristics.

If the flame is completely or mostly yellow, verify that the regulator is set for the correct fuel. After adjustment, retest. If any of the burners continue to burn mostly or com- pletely yellow, call Bosch Service (800-944-2904).

Note: With LP use, some yellow tipping on outer cones is normal.

Low Setting

All burners must also be inspected for carryover. On low, the flame should completely surround the burner. If any of the cooktop burners do not carry over on the low setting, call Bosch Service (800-944-2904).

Figure 14

Flame Characteristics

YellowFlames:

Further adjustment is required.

Yellow Tips on Outer Cones:

Normal for LP Gas.

Soft Blue Flames:

Normal for Natural Gas.

Installation is complete at this time.

WHENPROPERLYADJUSTED:

There should be a flame at each burner

port.

There should be no air gap between the

flame and burner

Replacement Parts: Visit your Bosch dealer for replacement parts. For a dealer near you contact Bosch service: 800-944- 2904 or www.boschappliances.com

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Bosch Appliances HDS252U, HDS255U Test the Installation, Test Electric Ignition, Test/Adjust Flame, Flame Characteristics