ECR International UTICA BOILERS MAC-150 Manuel D'installation, D'utilisation Et D'entretien page 20

4.1.2 Two pipe system - See Appendix A for approved
This type of venting allows for exhaust flue and intake flue to be separated from each other. Fresh air may be drawn in at a different
site from where the flue terminal is located.
The splitting kit consists of a adaptor (100/80) and of an intake air vent adapter.
For the air duct adaptor fit the screws and seals previously removed from the cap.
The 90° bend allows flue-air venting to connect to the boiler
regardless of direction as it can be rotated by 360°. It can
moreover be used as a supplementary bend to be coupled with
the duct or with a 45° bend.
45° bend 0.82 ft / 0.25 m
90° bend 1.64 ft / 0.50 m
Separated horizontal flue terminals installation options
The maximum length of the intake vent (L 1) cannot exceed 49.20
ft / 15.00 m.
(L1 + L2) max = 196.80 ft / 60.00 m
WARNING
Ensure a minimum downward slope of 0.79 in for every
3.28 ft of exhaust vent length (2.00 cm toward the boiler
per each meter for North America).
Separated flue terminals
Installation options
I
L max = 49.20 / 15.00
L
L max = 49.20 / 15.00
M
L max = 45.92 / 14.00
240011317, REV D (07/30/16)
m
m
m
op ons.
4.33 in 4.72 in 4.33 in
110.00 mm 120.00 mm
110.00 mm
6.97 in
117.00 mm
17.72 in
450.00 mm
20
5.53 in
140. 5 mm
13.78 in
350.00 mm
49 ft (14.9m) Max