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Iowa LIHEAP Policy and Procedures Manual Appendix H – Heating System Installation Standards

Effective 09/01/2023

Page | 105

Electrical service must be inspected to determine if it will handle the unit to be installed.

If a new non-portable space heater is installed it must be vented.

Perform a temperature rise and total external static pressure test to ensure they are within the manufacturer’s guidelines.

Perform CO testing to ensure it does not exceed 100 PPM, without any alterations to the furnace, lowering gas pressure below manufacturer recommendations, or changing orifice size.

Fuel Lines Check gas piping that was disturbed during the heating system replacement, for leaks. If checking natural gas lines, test above the lines. If propane, the probe must be placed under the lines because propane is heavier and will sink. Gas line connections must be tested by moving the probe around the connections at a rate of 1” per second. Gas leaks must be verified by soapy or bubbling solution to eliminate false positives. Copper piping on natural gas appliances is not to be replaced unless leaking or required by local code or the appliance is being replaced with ECIP funds. All gas piping must be installed according to the American Gas Association (AGA) specifications and any other appropriate codes. Flexible brass fuel lines must be replaced on all appliances. Flexible connectors manufactured before 1973 must be replaced. These can be identified by the manufacturer’s tag on the connector.

The LIHEAP customer must be informed of any other fuel leaks discovered during inspection and must be noted on the inspection form.

The LIHEAP customer must be informed of any CSST line that is not bonded and must be noted on the inspection form.

Basic operation of the new equipment will be explained to the occupant including: ● Efficiency measures ● Proper operation of controls ● Electrical and fuel disconnects or shut offs ● Location of combustion air intake including importance of not blocking the intake ● Importance of cleaning dust and debris from return grilles ● Importance of not blocking return or supply registers ● Importance of proper filter selection and how to change the filter ● Importance of routine maintenance

Manufactured Homes All units shall be sealed combustion.

Furnace Types ● Concentric Pipe Combustion Air Combustion air from the roof comes down the outside of the flue pipe, around the furnace cabinet, and into the heat exchanger where it mixes with gas during combustion. (See Figure 1)