Direct Vent - Vertical With Separate Pipes - Weil-McLain Eco Tec 2 Series Manual

ECO ® Tec series 2 gas-fired water boiler – boiler manual
DIRECT VENT —
Allowable vent/air pipe materials &
lengths
Use only the vent materials and kits listed
in Figure 27, page 23. Provide pipe adapters
if specified.
Locate the terminations such that the total air piping and
vent piping from the boiler to the termination will not
exceed the maximum length given in Figure 26, page 22.
For polypropylene applications, See venting
and air piping notes on page 21.
For AL29-4C vent pipe applications,
See venting and air piping notes on page 21.
Determine termination location
1. The air and vent terminations must be installed as
shown in Figure 42.
2. The terminations must comply with clearances and
limitations shown in Figure 28, page 25.
3. Locate the terminations so they are not likely to be
damaged by foreign objects, such as stones or balls,
or subject to buildup of leaves or sediment.
Multiple vent/air terminations
1. When terminating multiple boilers, terminate each
vent/air connection as described in this manual.
Terminate all vent pipes at the same height
and all air pipes at the same height to avoid
possibility of severe personal injury, death
or substantial property damage.
2. Place roof penetrations to obtain minimum clearance
of 12 inches between edge of air intake elbow
and adjacent vent pipe of another boiler for U. S.
installations (see Figure 43, page 35). For Canadian
installations, provide clearances required by CSA
B149.1 or B149.2 Installation Code and a ULC S636
compliant vent kit.
3. The air inlet of a boiler is part of a direct vent
connection. It is not classified as a forced air intake
with regard to spacing from adjacent boiler vents.
34
Vertical with separate pipes
Figure 42 Separate pipes vertical termination
Terminate vent and air pipes such that:
a. AIR INTAKE IS AT LEAST 12 inches below vent outlet.
b. AIR INTAKE IS AT LEAST 12 inches above roof or snow line.
c. Vent and air terminations are fitted with bird screens.
Step 1 Read and follow all instructions in this manual. DO NOT proceed
with vent/air installation until you have read page 20
through page 26.
Step 2 Install the boiler in a location that allows proper routing of all vent
and air piping to the selected sidewall location.
Step 3 Make sure the selected vertical termination location complies with
Figure 28, page 25. (Multiple boiler terminations must also comply
with Figure 43, page 35.)
Step 4 Use only the vent materials listed in Figure 27, page 23. Provide pipe
adapters where required. Vent piping and air piping lengths must not
exceed the values shown in Figure 26, page 22.
Step 5 Prepare the vertical penetrations and secure penetration components
as instructed in this section. See "Prepare roof penetrations" on page 35
and "Termination and fittings" on page 35.
Step 6 The air piping must terminate in a 180-degree return bend or down-
turned elbow as shown above. The vent piping must terminate in a
coupling pointed upward as shown above.
Step 7 Install vent and air piping between the boiler and the vertical
terminations. Slope horizontal piping downward toward the boiler at
least 1/4 inch per foot. Install pipe supports every 5 feet on both the
horizontal and vertical runs. Install a hanger support within 6 inches
of any upturn in the piping. See page 27 for general guidelines. Also
comply with vent pipe manufacturer's instructions.
See notices at left and page 21.
Step 8 Insert the vent and air piping through the vertical penetrations and
secure the termination fittings.
Step 9 Maintain clearances shown above. Vent and air terminations must be
fitted with a bird screen as shown.
See notices at left and page 21.
USE SWEEP ELBOWS FOR ALL VENT AND AIR
PIPING — DO NOT use short radius elbows for vent or
air piping. Boiler performance could be affected.
Part number 550-100-270/0122