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Y8610U INTERMITTENT PILOT RETROFIT KIT
23 68-0291—03
Exhibit B
Procedure for Installing Automatic Intermittent Pilot Systems
Prior to beginning this procedure, a preliminary examination of the appliance and the automatic intermittent pilot system should be
made to determine that the automatic intermittent pilot system can be properly applied to the appliance.
This procedure is intended as a guide to aid in safely installing a listed automatic intermittent pilot system on an existing listed
appliance equipped with an atmospheric gas burner(s) and not of the direct vent type.
This procedure is based on the assumption that the history of the specific installation has been one of safe and satisfactory
operation.
This procedure is predicated on central furnace and boiler installations, and it should be recognized that generalized procedures
cannot anticipate all situations. Accordingly, in some cases, deviation from this procedure may be necessary to determine safe
operation of the equipment.
The following steps should be followed in making the modifications:
1. Perform a safety inspection of the existing appliance installation. See Exhibit A for a recommended procedure for such a
safety inspection.
2. Shut off all gas and electricity to the appliance. To shut off gas, use the shutoff valve in the supply line to the appliance. If a
manual gas valve is not in the gas supply line within 6 feet of the appliance in an accessible location, one shall be installed.
Do not use the shutoff valve which is provided as part of a combination control.
3. Install the automatic intermittent pilot system in strict accordance with the manufacturer’s installation instructions.
4. Turn on all gas and electricity to the appliance.
5. Determine that the appliance transformer has adequate capacity by following the steps outlined below:
a. Compute the approximate current draw by adding the current draw of the automatic intermittent pilot system to (1) the
current draw of the associated valving, and (2) the current draw of any relays or other devices operated by the trans-
former.
b. Multiply the total current draw as computed above by 24 V to determine the total VA (volt-ampere) required.
c. The total VA (volt-ampere) required should be equal to or less than the VA rating of the transformer.
d. If the total VA (volt-ampere) required is greater than the VA rating of the transformer, the transformer must be replaced
with a Class 2 transformer of adequate rating.
6. Check the heat anticipator in the comfort thermostat to determine if it is properly adjusted to the current draw of the control
system. Follow the thermostat manufacturer’s instructions.
7. Make certain wiring connections are tight and wires are positioned and secured so they will not be able to contact high tem-
perature locations.
8. Conduct a Gas Leakage Test of the appliance piping and control system downstream of the shut-off valve in the supply line
to the appliance.
9. Perform the following:
a. Adjust the thermostat to its highest temperature setting, and test manifold pressure and adjust the pressure regulator to
match original input as required (refer to Exhibit A, step 9b).
b. Visually determine that main burner is burning properly; i.e., no floating, lifting or flashback. Adjust the primary air shut-
ter(s) as required.
10. If the appliance is equipped with high and low flame control or flame modulation, check for proper main burner operation at
both high and low flame.
11. Determine that the pilot is igniting and burning properly and that main burner ignition is satisfactory by interrupting and rees-
tablishing the electrical supply to the appliance in any convenient manner. Make this determination with the appliance burner
both cold and hot. Perform this step as many times as is necessary to satisfy yourself that the automatic intermittent pilot
system is operating properly.
12. Test the pilot safety device (1) to determine if it is operating properly, and (2) for turndown characteristics according to the
manufacturer’s installation instructions. No adjustments should be made other than those recommended by the system man-
ufacturer.
13. Sequence the appliance through at least three operating cycles.
14. Applicable only to furnaces. Check both the limit controller and the fan controller 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 controller acts to shut off the main burner gas.
15. Applicable only to boilers.
a. Determine that the circulating water pumps are in operating condition.
b. Test low water cutoffs, automatic feed water controls, pressure and temperature limit controllers and relief valves in
accordance with the manufacturer’s recommendation to determine they are in operating condition.
16. Add the labels (see 1.6.1-n and -o) on the appliance.
Exhibit B of ANSI Standard Z21.71 for Automatic Intermittent Pilot Ignition Systems for Field Installation.