Safety Inspection - Field Controls GVD-4 Manuel D'instructions

SAFETY INSPECTION

1. Conduct a gas leakage test of the appliance piping and control system downstream of the shutoff valve
in the supply line to the appliance.
2. Visually inspect the venting system for proper size, horizontal pitch, and vent termination, and determine
there is no blockage or restriction, leakage, corrosion, or other defi ciencies which could cause an unsafe
condition.
3. Determine that the chimney or vent is acceptable to the authority having jurisdiction.
4. Shut off all gas to the appliance and shut off any other fuel-gas burning appliance within the same room.
Use the shutoff valve in the supply line to each appliance.
5. Inspect burners and crossovers for blockage and corrosion.
6. Applicable only to furnaces – inspect heat exchanger for cracks, openings, or excessive corrosion.
7. Applicable only to boilers – inspect for evidence of water or combustion product leaks.
8. Insofar as is practical, close all building doors and windows and all doors between the space in which
the appliance is located and other spaces of the building. Turn on clothes dryers, stove top barbecues,
and central vacuum cleaners. Turn on any exhaust fans, such as range hoods and bathroom exhausts,
so they will operate at maximum speed. Do not operate a summer exhaust fan. Close fi replace dampers.
If, after completing Steps 9 through 14, it is believed suffi cient combustion air is not available, refer to
local codes, or in the absence of local codes, to the National Fuel Gas Code, ANSI Z223.1 or CAN/
CGAB149 Installation Codes, for guidance.
9. Place in operation the appliance being inspected. Follow the lighting instructions. Adjust thermostat so
appliance will operate continuously.
10. Determine that the pilot(s) is burning properly and that main burner ignition is satisfactory by interrupting
and reestablishing the electrical supply to the appliance in any convenient manner. Test the pilot safety
device to determine it is operating properly by extinguishing the pilot burner(s) when the main burner(s)
is off and determining, after 3 minutes, that the main burner gas does not fl ow upon a call for heat.
11.
a. Visually determine that main burner gas is burning properly: i.e., no fl oating, lifting or fl ashback.
Adjust the primary air shutter(s) as required.
b. If the appliance is equipped with high and low fl ame controlling or fl ame modulation, check for
proper main burner operation at low fl ame.
12. Test for spillage at the draft hood relief opening after 5 minutes of main burner operation. Vent
connected gas utilization equipment shall be operated for several minutes and checked to see that the
combustion products are going up the chimney, or gas vent, properly by passing a lighted match, taper
or candle round the edge of the relief opening of the draft hood. If the chimney or gas vent is drawing
properly, the match fl ame will be drawn into the draft hood. If not, the combustion products will tend to
extinguish the fl ame. If the combustion products are escaping from the relief opening of the draft hood,
the equipment should not be operated until proper adjustments or repairs are made to provide adequate
draft through the chimney or gas vent.
13. Turn on all other fuel-burning appliances within the same room so they will operate at their full inputs.
Follow lighting instructions for each appliance.
14. Repeat Steps 11 and 12 on the appliance being inspected.
15. Return doors, windows, exhaust fans, fi replace dampers, and any other fuel-gas burning appliances to
their previous conditions of use.
16. Applicable only to furnaces – Check both the limit control and the fan control for proper operation.
Limit control operation can be checked by blocking the circulating air inlet or temporarily disconnecting
the electrical supply to the blower motor and determining that the limit control acts to shut off the main
burner gas.
17. Applicable only to boilers –
a. Determine that the water pumps are in operating condition.
b. Test low water cutoffs, automatic feed controls, and relief valves in accordance with the manufacturer's
recommendations to determine they are in operating condition.
P/N 46352700 Rev J 05/19
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