INDUCED DRAFT BLOWER | HORIZONTAL VENTING - RESIDENTIAL INSTALLATION |
UPWARD SLOPE | |
| 12 INCHES |
| MIN. (30.5CM) |
| FLUE TRANSITION |
| (PROVIDED) |
VENT TERMINATION CAP
LISTED THIMBLE THROUGH
COMBUSTION WALL
MAY BE SINGLE WALL (26 GSG) GALV. OR EQUIV. STAINLESS
STEEL SEALED ACCORDING TO THESE INSTALLATION
INSTRUCTIONS OR A SINGLE SECTION OF TYPE
SLOPED: + 1/4 INCH FOR 1 FOOT RUN MINIMUM.
NOTE - MINIMUM HORIZONTAL LENGTH 3FT. (914MM), NOT INCLUDING CAP FOR TERMINATION.
MAXIMUM HORIZONTAL LENGHT 5FT. (1.5M) PLUS ONE 90-
DEGREE ELBOW.
COMMON VENTING NOT ALLOWED WHEN HORIZONTALLY VENTING THE UNIT HEATER.
FIGURE 6
F – VENTING USING A MASONRY CHIMNEY
The following additional requirements apply when a lined masonry chimney is being used to vent the compact unit heater.
1.Masonry chimneys used to vent Category I units heaters must be either
2.A fan assisted unit heater may be commonly vented into an existing lined masonry chimney provided:
•The chimney is currently serving at least one
•The vent connector and chimney are sized in accordance with venting tables in the (American) National Fuel Gas Code ANSI Z223.1 or (Canada) CSA B149.1 Natural Gas and Propane Installation Code.
IMPORTANT Single appliance venting of a fan assisted unit heater into a tile lined masonry chimney (interior or outside wall) is prohibited. The chimney must first be lined with either type
3.A type
4.Do not install a manual damper, barometric draft regulator, or flue restrictor between the unit heater and the chimney.
5.If type
6.Insulation for the flexible vent pipe must be an encapsulated fiberglass sleeve recommended by the flexible vent pipe manufacturer.
7.The space between liner and chimney wall should NOT be insulated with puffed mica or any other loose granular insulating material.
8.If type
G – REMOVAL OF UNIT FROM COMMON VENT
In the event that an existing unit heater is removed from a venting system commonly run with separate gas appliances, the venting system is likely to be too large to properly vent there maining attached appliances. The following test should be conducted while each appliance is in operation and the other appliances are not in operation, yet remain connected to the common venting system. If the venting system has been installed improperly, the system must be corrected.
1.Seal any unused openings in the common venting system.
2.Visually inspect the venting system for proper size and horizontal pitch. Determine there is no blockage or restriction, leakage, corrosion, or other deficiencies which could cause an unsafe condition.
3.In so far as is practical, close all building doors and windows and all doors between the space in which the appliances remaining connected to the common venting system are located and other spaces of the building. Turn on clothes dryers and any appliances not connected to the common venting system. Turn on any exhaust fans, such as rangehoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers.
4.Follow the lighting instructions. Place the appliance being inspected in operation. Adjust thermostat so appliance will operate continuously.
Enerco Compact Unit Heater | 8 | Operating Instructions and Owner’s Manual |