S8600, S8610, S8660, S8670 INTERMITTENT PILOT MODULE
19
69-0463—01
ANSI STANDARDS
EXHIBIT A
RECOMMENDED PROCEDURE FOR SAFETY INSPECTION OF AN EXISTING APPLIANCE INSTALLATION AS A
PRELIMINARY STEP TO APPLYING AN AUTOMATIC INTERMITTENT PILOT SYSTEM
The following procedure is intended as a guide to aid in
determining that an appliance is properly installed and is
in a safe condition for continuing use.
This procedure is predicated on central furnace and boiler
installations equipped with an atmospheric gas burner(s)
and not of the direct vent type. It should be recognized
that generalized test procedures cannot anticipate all
situations. Accordingly, in some cases, deviations from
this procedure may be necessary to determine safe
operation of the equipment.
a. This procedure should be performed prior to
any attempt at modification of the appliance or
the installation.
b. If it is determined there is a condition that could
result in unsafe operation, the appliance should
be shut off and the owner advised of the unsafe
condition.
The following steps should be followed in making the
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
and horizontal pitch and determine there is no
blockage or restrictions, leakage or corrosion or
other deficiencies that could cause an unsafe
condition.
3.
Shut off all gas to the appliance and shut off any
other fuel-burning appliances within the same room.
Use the shutoff valve in the supply line to each
appliance.
4.
Inspect burners and crossovers for blockage and
corrosion.
5.
Applicable only to warm air heating appliances.
Inspect heat exchangers for cracks, openings or
excessive corrosion.
6.
Applicable only to boilers. Inspect for evidence of
water or combustion product leaks.
7.
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. 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
fireplace dampers. If, after completing steps 7
through 12, it is believed sufficient combustion air is
not available, refer to 1.3.4 of the National Fuel Gas
Code (Z223.1) for guidance.
8.
Place in operation the appliance being inspected.
Follow the lighting instructions. Adjust thermostat so
appliance will operate continuously.
9.
Determine that the pilot is burning properly and that
main burner ignition is satisfactory by interrupting
and re-establishing the electrical supply to the
appliance in any convenient manner.
a. Determine manifold pressure in order to match
input after the new control is installed.
10.
Visually determine that main burner gas is burning
properly; i.e., no floating, lifting or flashback. Adjust
the primary air shutter(s) as required.
a. If appliance is equipped with high and low flame
control or flame modulation, check for proper
main burner operation at low flame.
11.
Test for spillage at the draft hood relief opening after
five minutes of main burner operation. Use a draft
gauge, the flame of a match or candle, or smoke
from a cigarette, cigar, or pipe.
12.
Return doors, windows, exhaust fans, fireplace
dampers and all other fuel-burning appliances to
their previous conditions of use.
13.
Applicable only to warm air heating appliances.
Check both limit controller and fan controller for
proper operation. Limit controller operation can be
checked by temporarily disconnecting the electrical
supply to the blower motor and determining that the
limit control acts to shut off the main burner gas.
14.
Applicable only to boilers:
a. Determine that the circulating water pumps are
in operating condition.
b. Test low water cutoffs, automatic feed controls,
pressure and temperature limit controls and
relief valves in accordance with the
manufacturer recommendations and
instructions to determine they are in operating
condition.
EXHIBIT A OF ANSI STANDARD Z21.71 FOR AUTOMATIC INTERMITTENT PILOT IGNITION SYSTEMS FOR
FIELD INSTALLATION
69-0463-1.fm Page 19 Wednesday, December 19, 2007 1:22 PM
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