Lochinvar Sunc Condensing Boiler 1.3 - Manual (Page 18)

18
Model
Vent
Diameter
Vent
Min.
Length
Vent
Max.
Length
Input
De-Rate per
25 feet of
Vent
SB 1000 6" 12’ 100’ 0.63%
SB 1300 6" 12’ 100’ 1.45%
SB 1500 6" 12’ 100’ 1.65%
Table 2B Room Air Minimum / Maximum Allowable Air /
Vent Lengths
Installation & Operation Manual
2
General venting
Air contamination
Pool and laundry products and common household and hobby
products often contain fluorine or chlorine compounds. When
these chemicals pass through the boiler, they can form strong
acids. The acid can eat through the boiler wall, causing serious
damage and presenting a possible threat of flue gas spillage or
boiler water leakage into the building.
Please read the information given in Table 1A, page 10,
listing contaminants and areas likely to contain them. If
contaminating chemicals will be present near the location of the
boiler combustion air inlet, have your installer pipe the boiler
combustion air and vent to another location, per this manual.
If the boiler combustion air inlet is located in
a laundry room or pool facility, for example,
these areas will always contain hazardous
contaminants.
To prevent the potential of severe personal
injury or death, check for areas and products
listed in Table 1A, page 10 before installing
the boiler or air inlet piping.
If contaminants are found, you MUST:
• Remove contaminants permanently.
—OR—
• Relocate air inlet and vent terminations
to other areas.
ƽ WARNING
ƽ WARNING
Optional room air
ƽ WARNING
When utilizing the single pipe method,
provisions for combustion and ventilation
air must be in accordance with Air for
Combustion and Ventilation, of the latest
edition of the National Fuel Gas Code,
ANSI Z223.1, in Canada, the latest edition
of CGA Standard B149 Installation
Code for Gas Burning Appliances and
Equipment, or applicable provisions of
the local building codes.
Applications utilizing the SYNC boiler may be installed with
a single pipe carrying the flue products to the outside while
using combustion air from the equipment room. In order to
use the room air venting option the following conditions and
considerations must be followed.
• The unit MUST be installed with the appropriate
room air inlet cover (factory installed).
• The equipment room MUST be provided with
properly sized openings to assure adequate
combustion air. Please refer to instructions provided
with the room air kit.
• There will be a noticeable increase in the noise level
during normal operation from the inlet air opening.
• Using the room air configuration makes the unit
vulnerable to combustion air contamination from
within the building. Please review Section 1,
Prevent Combustion Air Contamination, to ensure
proper installation.
• Vent system and terminations must comply with the
standard venting instructions set forth in this
manual.
NOTICE FOR DIRECT VENT SYSTEMS
REMOVE AIR INLET COVER AND
INSTALL RUBBER COUPLING FOR
PVC / CPVC VENT SYSTEMS OR
STAINLESS STEEL ADAPTER FOR
STAINLESS STEEL VENT SYSTEMS
Figure 2-5 Room Air Installation