E-6
Compact Unit Heater
Operating Instructions and Owner’s Manual
FIGURE 3
COMMON VENTING NOT ALLOWED WHEN HORIZONTALLY VENTING THE UNIT HEATER
CONDENSATE DRAIN THROUGH TEE PIPE AND DRAIN LOOP
UPWARD SLOPE ON HORIZONTAL VENT-COMMERCIAL INSTALLATION
MAY BE SINGLE WALL (26 GSG) GALV. OR EQUIV. STAINLESS STEEL SEALED ACCORDING TO
THESE INSTALLATION INSTRUCTIONS. SLOPE: + 1/4 INCH FOR 1 FOOT RUN MINIMUM.
INDUCED DRAFT BLOWER
DRAIN LOOP WITH WATER
TRAP (TO CONDENSATE DRAIN)
LISTED THIMBLE
THROUGH COMBUSTIBLE
WALL
12 INCHES MIN.
(30.5 CM)
VENT TERMINATION
CAP
NOTE - MINIMUM HORIZONTAL LENGTH 3 FT. (914MM),
NOT INCLUDING CAP FOR TERMINATION. REFER TO TABLE
2 FOR MAXIMUM LENGTH AND NUMBER OF ELBOWS.
12” (30.5 CM)
MINIMUM ABOVE ALL
HIGHEST SNOWFALL
FLUE TRANSITION
(PROVIDED)
3. The maximum vent length is 5’ (1.5m) plus one 90-degree
elbow. The minimum length is 3’(.91m).
4. The vent must maintain a ¼” rise per foot of slope upwards
toward the termination.
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 tile-lined or lined with a listed metal lining
system or dedicated gas vent. Unlined masonry chimneys are
prohibited. A category I appliance must never be connected
to a chimney that is servicing a solid fuel appliance. If a
fireplace chimney flue is used to vent this appliance, the
fireplace opening must be permanently sealed.
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 draft-hood
equipped appliance.
•
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.
HORIZONTAL VENTING - RESIDENTIAL INSTALLATION
UPWARD SLOPE
INDUCED DRAFT BLOWER
12 INCHES
MIN. (30.5CM)
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 B-1 VENT.
SLOPED: + 1/4 INCH FOR 1 FOOT RUN MINIMUM.
NOTE - MINIMUM HORIZONTAL LENGTH 3FT. (914MM), NOT
INCLUDING CAP FOR TERMINATION.
MAXIMUM HORIZONTAL LENGTH 5FT. (1.5M) PLUS ONE
90-DEGREE ELBOW.
COMMON VENTING NOT ALLOWED WHEN HORIZONTALLY VENTING THE UNIT HEATER.
FLUE TRANSITION
(PROVIDED)
FIGURE 6
IMPORTANT
Single appliance venting of a fan assisted unit
heater into a tile lined masonry chimney (interior or outside wall)
vent or an insulated single wall flexible vent lining system, 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.
