Multiple Boiler Venting - General; Multiple Boiler Venting - Mounting - ECR International Dunkirk DMG-380 Installation, Operation & Maintenance Manual

!
WARNING
Asphyxiation hazard. DO NOT use screws to secure
piping together. Failure to follow these instructions
could cause death or serious injury.
!
WARNING
Cascade venting of condensing boilers shall be
vented with Duravent
material. Failure to follow these instructions could
result in death or serious injury.

6.9 Multiple Boiler Venting - General

• For common exhaust system DuraVent
approved vent manufacturer - DuraVent
valve is mandatory.
• See Figures 6-267, 6-27 and 6-28. Termination must be
vertical through the roof. Sidewall horizontal terminal not
allowed.
• On multiple venting applications ensure minimum
downward slope of 2 in (50.00 mm) for every 3 ft 4 in
(1.00 m) of duct length toward boiler.
• Manufacturer recommends use of CO monitor, calibrate
regularly per CO monitor manufacturer instructions.
• Place pipes at least 1 in (30 mm) from heat sources.
• Keep area clean and free of debris.
• On multiple venting applications use only water (H
lubricant when inserting pipes together. Do NOT use any
type of grease or similar substances.
• Do NOT use screws to secure pipes together.
• Before securing pipe with clamps, verify pipe is inserted per
vent manufacturer instructions.
• Install steel strapping (A) of pipe (B) distance of 10 in
(250.0 mm) from boiler.
• Secure flue pipe to wall with supports 3 ft. (1 meter) from
each other. Secure supports along the joint of each pipe.
6.10 Multiple Boiler Venting - Mounting Procedure -
See Figures 6-20 thru 6-22
1.
Vent pipes correctly mounted. See Figure 6-20.
2.
Line horizontal common vent pipes with male end towards
condensate collector end cap.
3.
Follow vent manufacturer's instructions when assembling
vent pipe to allow for expansion and contraction of vent
pipe during use.
4.
Hang horizontal common vent pipe, do not fully tighten
clamps down.
6 - COMBUSTION AIR AND VENT PIPING
polypropylene venting
®
is the only
®
. Use of check
®
FIGURE 6-20 Correctly Mounted Piping
L > 10 in
(250 mm)
FIGURE 6-21 Correctly Mounted Piping
O) as
2
FIGURE 6-22 Correctly Mounted Piping
32
USE OF CHECK
VALVE IS
MANDATORY
PN 240011664, Rev. F [07/30/2018]