Flue Options; Concentric Vent Screw Placement - UTICA BOILERS MAC-150 Installation, Operation & Maintenance Manual

Concentric Vent Support
All venting must be supported every 3.28 ft (1.00 m) using steel strapping or equivalent.
A: steel strapping or equivalent
Note:
Ensure that the vent is sloped towards the boiler approximately 0.79 in for every 3.28 ft (2.00 cm for every 1.00 m).
For horizontal flues a minor deviation from the horizontal is allowable, provided it results in a downward slope towards the boiler.
For the vertical flue terminal assembly refer to the separate installation instructions supplied with the assembly.
Additional flue components are available as follows:
45° bend 1.64 ft / 0.50 m
90° bend 3.28 ft / 1.00 m
Under no circumstances must the flue length (including allowances for extra bends) exceed 32.80 ft / 10.00 metres.
• Install a flue elbow on the adapter at the top of the boiler. Set the elbow to the required orientation (rear, right or left).
• Measure the distance from the outside wall face to the elbow. This dimension will be known as 'X'.
• To dimension 'X' add "Y" + 2 in (50 mm). This is the total dimension of the vents.
• Taking the air vent, mark the above dimension Measure the length of waste material, and transfer the dimension to the flue.
• Remove the waste from both vents (flue and air vents). Ensure that the cut ends are square and free from burrs.
• Insert the flue into the intake air vent and pass them through the hole in the wall
NOTICE
• Check all measurements before cutting. Minimum clearance to combustible materials when using a concentric
vent system is zero.
• After installing vents make sure that there is no recirculation of combustion by using a regularly calibrated analyzer.
• Ensure a minimum downward slope of 0.79 in / 2.00 mm for every 3.28 ft / 1.00 m of the flue length toward the boiler
at least 2º.
• Ensure that the terminal is positioned with the slots to the bottom.

Flue Options

• The boiler can be fitted with flue systems as illustrated.
• The standard flue (horizontal termination) is suitable only for horizontal applications.
• Maximum permissible equivalent flue lengths are:
Concentric and vertical flue = 32.80 ft / 10.00 m
• Any additional "in line" bends in the flue system must be taken into consideration.
Equivalent Straight Length
45° bend 1.64 ft / 0.50 m
90° bend 3.28 ft / 1.00 m
• The illustrations below show examples of maximum equivalent lengths.
• Instructions for guidance and fittings are included in each kit.
A
19
240011317, Rev. F [03/31/2017]