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Operating Instructions and Owner’s ManualEnerco | Compact Unit Heater
5. Vent termination must be a minimum of 4' (1.2m) below or 4’
(1.2m) horizontally from any soffit vent or under-eave vent.
6. Vent must be a minimum of 6' from an inside corner formed
by two exterior walls. If possible, leave a 10' clearance.
7. Vent termination must be a minimum of 10' (3m) from any
forced air inlet (includes fresh air inlet for other appliances,
such
as a dryer).
8. When termination is routed through an exterior combustible
wall
the vent must be supported using a listed clearance
thimble.
Where local authorities permit, a single section of
ty
pe B-1 vent pipe may be used as an alternative to the
thimble.
When using a type B-1 vent termination use the
clea
rances specified by the vent manufacturer. Seal the
connection
between the single wall and double wall pipes and
the
annular space of the double wall pipe as shown in figure
2.
Inside edge of vent termination tee must be at least 12
inches
from outside wall as shown in figure 3 .
9. For horizontal venting, the vent pipe shall be supported with
hangers
no more than 3ft. (1m) apart to prevent movement
aft
er installation.
D – HORIZONTAL VENTING – COMMERCIAL
1. Horizontal commercial installations are for buildings which are
not
attached to living spaces. The vent may be single wall
vent
material installed according to the sections
Venting A - General Recommendations and
Requirements
an
d C - Horizontal Venting General
an
d
D
- Horizontal Venting - Commercial. Refer to figure 3.
2. The vent pipe diameter for horizontal commercial
install
ations shall be 4" (101mm) on the 45 and 75units. In all
cases a fl
ue transition piece (supplied) is required to fit over
the outlet
of the induced draft assembly on the appliance.
3. Refer to table 2 for maximum vent connector lengths.
4. Select a wall termination point that will maintain ¼” rise per
foot
slope of horizontal run of vent pipe. The vent may be
single
wall material minimum 26 GSG (0.46mm) galvanized
steel or equivalent grade stainless steel. Seal single wall vent
material
according to the section A - General
Recommendations and Requirements.
5. For upward sloped vent a condensate tee and drain must be
installed
within the first 5’ (1.5m) from the unit heater to
protect
the appliance. If a flexible condensate drain line is
used,
the drain line must include a loop entering the structure.
If
the unit is shut down for an extended period of time and
will
be exposed to sub-freezing temperatures, the condensate
ma
y freeze.
E – HORIZONTAL VENTING – RESIDENTIAL
1. For horizontal residential installations these units are certified
as
Category I appliances. The vent may be single wall
material minimum 25 GSG (0.46mm) galvanized steel or
equi
valent grade stainless steel. Venting A - General
Recommendations and Requirements an
d C - Horizontal
Venting General and E - Horizontal Venting - Residential.
Refer to figure 6 .
2. The vent pipe diameter for horizontal residential installations
shall
be 4" (101mm) on both 45 and 75 units. A standard vent
transition is required at unit in addition to the transition
supplied
with the unit.
3. The maximum vent length is 5’ (1.5m) plus one 90-degree
elb
ow.
4. The vent must maintain a ¼” rise per foot of slope upwards
toward
the termination.
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 INSTRUCITONS. SLOPE: + 1/4 INCH FOR 1 FOOT RUN MINUMUM.
INDUCED
DRAFT BLOWER
DRAIN
LOOP WITH WATER
TRAP
(TO CONDENSATE DRAIN)
LISTED THIMBLE
TH
ROUGH COMBUSTIBLE
WALL
12 INCHES MIN.
(30.5 CM)
VENT
TERMINATION
CAP
NOTE - MINIMUM HORIZONTAL LENGHT 3 FT. (914MM),
NOT INCLUDING CAP FOR TERMINATION. REFER TO
TABLE 2 FOR MAXIMUM LENGTH AND NUMBER OF
ELB
OWS.
12” (30.5 CM)
MINIMUM
ABOVE ALL
HIGHEST
SNOWFALL
FLUE TRANSITION
(P
ROVIDED)