Co-Venting Precautions - DeDietrich 310 ECO Series Installation And Operating Manual


Warning & precautions:
Venting lengths must not exceed the minimum and maximum equivalent lengths shown in table 07. Any
horizontal runs of the venting must slope towards the boiler ½" per linear foot.
This venting system uses a single vent to discharge all flue gases to the outside, combustion air provided
within the boiler room, the air source must be sized in accordance to national codes CSA B149 & ANSI
Z223.1 or local codes having jurisdiction, more than one source may be required. The vent terminal
locations follow local and national codes requirements. The vent terminal shall discharge flue gases
away from the building structure so that the flue gases do not cause damage to the building, the vent
terminal locations must also follow CSA B149 & ANSI Z223.1.[See section 7.3.9
Application Note:
The venting must be between
the minimum and maximum
equivalent vent lengths show
in table 5. For values not
show in the chart, consult
your local De Dietrich
Representative.
Caution – Warning:
Flue gas condensation is very aggressive and corrosive which could lead to failure of the venting system
or drains, consult local and national codes regarding flue gas condensation disposal. The P-trap
assembly must be properly filled with water to avoid escape of flue gas emissions. The flue gas
condensation may require neutralization prior to entering the drain.
7.3.8 Co-venting – Retrofitting:
At the time of removal of any existing boiler is removed from a common vent system, the following steps
shall be performed with the each remaining appliance connected to the common vent in operation and not
in operation. This boiler must not be co-vented with a category I or III appliance. The boiler must have a
vent damper installed when in a vent category IV positive pressure installation co-venting with other
appliances.
a. Any used opening of the vent system be properly sealed
b. Visually inspect the venting system for proper size and horizontal pitch, determine there is no
blockage, restriction, leakage, corrosion and other deficiencies could cause an unsafe condition.
c. Close all building doors, windows and all doors between the appliances which remain connected
to the common venting system are located and other space of the building. Turn on clothes
dryers, exhaust fan at maximum speed and any appliance not connected to the common vent
system, close fireplace dampers. Do not operate a summer exhaust fan.
d. Place in operation each of the appliances installed in the common vent system being inspected.
Follow the lighting instructions. Adjust thermostat so appliance will operate continuously.
e. Test for spillage near and around the each of the gas appliances after 5 minutes of main burner
operation.
f. After determining that each appliance remaining connected to the common venting system
properly vents when tested as outlined above, return all doors, windows, exhaust fan, fireplace
dampers and any other gas burning appliance to their normal positions.
g. Any improper operating of the venting system must be corrected so the installation conforms to
either ANSI Z223.1/NFPA 54 or CAN/CSA B149.1 gas installation codes. When resizing any
portion of the common venting system, the common venting system shall be resized to approach
the minimum size as determined using the appropriate tables in Part II of ANSI Z223.1/NFPA 54
gas code &/or CAN/CSA B149.1 natural gas and propane installation code.
Sidewall vent length chart [sealed combustion air]
Gas 310/610
Vent ø
Model
inch mm
310-5
310/610-6
10 250
310/610-7
310/610-8
310/610-9
Table 05 - venting length chart. Table also applies to Gas 610 models.
24
De Dietrich Gas 310/610 ECO
Vent
90° Elbow =
Vent Length Length
[Min] [Max]
Ft. m Ft. m
5 1.5 65 20
45° Elbow =
Length Length
Ft. m Ft. mm
12 3.5 6.5 2