Installation Guide

I&O manual

WARNING

Horizontal portions of the venting system shall be supported to prevent sagging using hangers or perforated straps and must slope upwards

not less than 1/4” per foot (0.635 cm/m) from the furnace to the vent terminal.

It is recommended that you follow the venting safety procedure below. This procedure is designed to detect an inadequate ventilation system

that can cause the appliances in the area to operate improperly causing unsafe levels of Carbon Monoxide or an unsafe condition to occur.

CARBON MONOXIDE POISONING HAZARD

Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon

-monxide poisoning or death. The following steps shall be followed for each appliance connected to the venting system being placed into oper-

ation, while all other appliances connected to the venting system are not in operation:

1. Inspect the venting system for proper size and horizontal pitch. Determine that there is no blockage, restriction, leakage, corrosion or other

deficiencies, which could cause an unsafe condition

2. Close all building doors and windows and all doors.

3. Turn on clothes dryers and TURN ON any exhaust fans, such as range hoods and bathroom exhausts, so they shall operate at maximum

speed. Open the fireplace damper. Do not operate a summer exhaust fan.

4. Follow the lighting instructions. Place the appliance being inspected in operation. Adjust thermostat so the appliance shall operate

continuously.

5. Test each appliance (such as a water heater) equipped with a draft hood for spillage (down-draft or no draft) at the draft hood relief opening

after 5 minutes of main burner operation. Appliances that do not have draft hoods need to be checked at the vent pipe as close to the

appliance as possible. Use a combustion analyzer to check the CO2 and CO levels o each appliance. Use a draft gauge to check for a

downdraft or inadequate draft condition.

6. After it has been determined that each appliance properly vents when tested as outlined above, return doors, windows, exhaust fans,

fireplace dampers and any other gas burning appliance to their normal condition.

7. If improper venting is observed during any of the above tests, a problem exists with either the venting system or the appliance does not

have enough combustion air (Supply Air from outside) to complete combustion. This condition must be corrected before the appliance can

function safely.

NOTE: An unsafe condition exists when the CO reading exceeds 40 ppm and the draft reading is not in excess of -0.1 in. W.W.(-25 kPa) with

all of the appliance(s) operating at the same time.

8. Any corrections to the venting system and / or to the supply (outside) air system must be in accordance with the National Fuel Gas Code

Z223.1 or CAN/CGA B149.1 Natural Gas and Propane Installation Code (latest editions). If the vent system must be resized, follow the

appropriate tables in Appendix G of the above codes or for this appliance.

Specially Engineered Installations

The above requirements shall be permitted to be waived where special

engineering, approved by the authority having jurisdiction, provides an

adequate supply of air for combustion and ventilation.

Fig 28: Attic and Crawl Space Co mbustion Air Termination

Be sure to instruct the owner not to block this intake pipe.

12” Min.

12” minimum

between bottom

of air intake and

any material below.