Venting; Chimney Vented; Without A Barometric Damper; Chimney Installations - ICP OLR105A12D Installation Instructions Manual

Minimum Installation clearances from combustible materials (Chimney installation*)
LOCATION APPLICATION
Furnace
Sides
Supply plenum, warm air duct within 6' of furnace
Back Furnace
Top Furnace casing or plenum
Bottom Furnace – combustible floor **
Front Furnace
* See paragraph 1.4.3, p. 6 for Direct Vent application clearances.
** Combustible floor requires accessory bases CFB-1 or HFB-1.
However, do not install furnace directly on carpet or other
combustible material which can trap air under the furnace
floor.
The furnace must be installed level for safe and quiet
operation.
The required minimum clearances for this furnace are
specified in Table 1 above.
CAUTION
Do NOT operate furnace in a corrosive atmosphere
containing chlorine, fluorine or any other damaging
chemicals. Refer to Part 1, section 5.2.
1.4

VENTING

1.4.1 General
Furnaces can be vented in several ways:

Chimney Vented

Using the Beckett AFG or Riello 40-F burner, the furnaces can
be chimney vented with or without a barometric damper. The
unit will operate at a negative overfire draft and flue draft.
WARNING
Poisonous carbon monoxide
explosion hazard.
Read and follow all instructions in this section.
Failure to properly vent this furnace can cause
death, bodily injury and/or property damage.
WARNING
Poisonous carbon monoxide gas hazard.
Never vent this furnace together with another
combustion appliance when side-wall venting.
To do so may result in asphyxiation and death to
the occupants.
Side-wall Vented
Using the Beckett AFII or Riello 40-BF burner with the integral
pre- and post-purge controls, the system can be side-wall
vented for maximum efficiency and without the use of a side-
wall power vent. The unit will operate at a positive overfire
draft and flue draft.
TABLE 1
gas, fire and
OLR160 - OUF160
2.54 cm (1")
2.54 cm (1")
45.72 cm (18")
5.08 cm (2")
ø
60.96 cm (24")
1.4.2

Chimney installations

When set up for chimney venting, this furnace is certified for
use with an L-vent, A-vent, tile-lined and metal-liner-tile lined
chimney, and can be vented both with and without a
barometric draft damper. However, this furnace is not
approved for use without a barometric damper if it is to be
vented together with another oil-fired appliance such as a
water heater.
With a barometric damper
This furnace may be vented into a chimney of suitable size
and adequate chimney base temperature, as specified in the
Installation Code. When a barometric damper is used, the air
entering the damper reduces the possibility of vent
condensation. The relevant excerpt from the code is found in
this section and can be used as a guide where local or
national codes do not exist. One option to increase the
chimney base temperature is to use vent connection
insulation.
WARNING
Poisonous carbon monoxide gas hazard.
Never install a hand operated damper in the vent
pipe. However, any Underwriters Laboratories listed
electrically operated automatic type vent damper
may be installed if desired. Be sure to follow the
instructions provided with vent damper. Read and
follow all instructions in this section.
Failure to properly vent this furnace or other
appliances can result in death, personal injury
and/or property damage.

Without a barometric damper

Due to the lack of dilution air that would ordinarily be drawn
into the barometric damper, the dew point of the flue gases is
raised. To offset the
condensation, the chimney must be lined. The liner must be
insulated according to the insulating procedure recommended
by the manufacturer of the liner. Also, the vent connector
should be as short as possible and be either of double wall
construction or of single wall construction with 2.54 cm (1") of
insulation.
OLR105 - OLF105 - NOLF105
OUF105 - NOUF105
2.54 cm (1")
2.54 cm (1")
2.54 cm (1")
2.54 cm (1")
ø
60.96 cm (24")
increased tendency for vent
5