Service manual

6
6.2 STANDARD VENTING
The non-condensing 85% efficient MicoFlame
Grande is a category I appliance and is
approved for venting into a common chimney
provided it is in good condition and meeting the
local Codes. Typically, the chimney will be ‘B’
vent or brick with clay or metal liner. If the
chimney height is much greater than 30 feet or if
drafts are in excess of negative 0.05” W.C., it
will be necessary to provide a single acting
barometric damper directly above the vent
collar. This damper will ensure smooth light off
and minimize standby loss through the
appliance. Be sure to position the damper at
least 6” away from the wall of the vent
connector.
6.3 SIDEWALL AND VERTICAL VENTING
When fitted with the factory supplied vent
terminal, the MicoFlame Grande can vent up to
60 equivalent feet. Elbows can range from 8 to
15 feet in equivalent length depending on
centreline radius. See Table 3 for vent sizes.
Appliances may be installed with either a
horizontal sidewall vent or vertical roof top
terminal. Terminals differ with each application.
Horizontal lengths over 5 feet must be installed
using corrosion resistant stainless steel. Use
single wall vent and seal all joints or use
pressure rated double wall vent.
Refer to local codes for proper installation and
location of vent terminals.
When using sidewall vent, all vent connector
seams and joints must be sealed with pressure
sensitive aluminium tape or silicone sealant as
specified by the vent manufacturer. Aluminium
tape must meet the provisions of SMACNA
AFTS-100-73 Standard.
When venting through unheated spaces with
single wall vent, insulation must be properly
wrapped around the vent pipe to prevent flue
gas condensation inside the vent.
Periodically check to ensure that the vent
terminal is unobstructed.
6.6 OUTDOOR AIR KIT
When fitted with the factory supplied air inlet ring
and air intake terminal, the MicoFlame Grande
can draw outdoor air over an equivalent length
of 60 feet. See Table 3 for vent sizes.
Appliances may be installed with either a
horizontal sidewall vent or vertical roof top
terminal. Terminals differ with each application.
The following applies to outdoor air installations:
1. Use only factory supplied air intake
terminal.
2. Periodically check to ensure that air
intake is not obstructed.
3. Refer to local codes for proper
installation and location of vent
terminals. Vertical vent terminal must be
at least 3 feet above the highest point
where it is located above the roof of a
building
4. Locate the air intake at least five feet
away from the vent discharge. For
sidewall venting locate the air intake
below the vent outlet if possible.
6.5 FILTER KIT
A slot at the bottom of the rear panel is the
standard air inlet configuration for the
MicoFlame Grande. As an option, outside air
could be introduced directly through the back or
top panels. A filter kit is available. The filter is
washable and accounts for an additional
pressure loss of less than 0.05” W.C. Highly
recommended for dusty environments. The filter
kit can also be provided when using the outdoor
air kit.
Conventional Venting
Multiple condensing appliances may be vented
into a common chimney. The chimney must be
lined with AL29-4C or equivalent and a single
acting barometric damper must be provided for
each appliance.