CT80-250
Natural Draft - Installation & Operation Instructions
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Odyssey
17
Connect Breeching & Blocked Vent Switch
Restrictions - Use the minimum vent length and number of elbows possible to ensure
flow of combustion gases are not restricted. Failure to follow instructions may result in
severe personal injury or death.
Blocked Vent Switch - For complete installation details, refer to the manufacturer’s
instructions included with the Blocked Vent Switch.
The steps for connecting breeching to a chimney are illustrated in Figure 6-1 and should be read in conjunction
with the sizes specified in Table 6-1. Restricted flow can result in condensation, flue gas leakage, and/or carbon
monoxide emissions.
Breeching Installation:
1.
Chimney Clearances - Observe clearances to combustibles for breeching and chimney connections.
2.
Supports - Install flue pipe brackets according to local codes or as needed.
3.
Breeching Sizes- Connect breeching to the boiler flue collar. Use full size breeching when possible. Refer to
Table 6-1 for minimum sizes.
4.
Potential Restrictions - Keep breeching lengths and elbow-tee combinations to a minimum to avoid
restricting the flow of combustion gases. See warning titled “Restrictions”.
5.
Chimney Connections - Use thimble or slip joint where breeching enters chimney to allow for removal for
cleaning and servicing.
6.
Avoiding Obstructions - Ensure breeching does not protrude so far into the chimney that it will cause
obstruction. Avoid connecting near the bottom of chimney as blockages may result.
7.
Draft Regulator - Ensure damper is level. See instructions included with regulator.
8.
Normal Draft Settings - When properly installed, Odyssey models are designed to operate with -.03” w.c.
draft in the flue breaching. For proper operation, there must be enough natural or mechanical draft. Due to the
design of the Odyssey, it may operate at a positive over fire pressure up to +.20 at -.03 draft.
9.
Draft Gauge (if applicable) - A barometric control can be used to adjust the draft opening by installing it in
the breeching. This is optional and typically only done when excessive draft conditions exist which must be
relieved or to comply with applicable codes or regulations.
10.
Sealing - Seal all vent joints.
11.
Blocked Vent Switch - Install switch 6-8” from boiler breeching (Canada). See manufacturer’s instructions.
12.
Interlock Set-up - Interlock burner with fan operation before start-up if using a motorized damper to supply
outdoor combustion air or induced draft.
