Table of Contents
Advertisement
3.6.5 Measuring Flue Length
The gas removal and air intake systems may be oriented in any
direction (north, south, east or west). Some special components
such as elbows are used to help reach certain positions. Each
removal terminal kit includes an adapter for connection to the
water heater and a removal terminal.
The total length of the tubes must not exceed the maximum
value defined. If the removal installation includes elbows while
calculating the total length you must take into account that each
elbow has a resistance equal to a specific linear Leq equivalent
length (see table).
There are two different types of terminals (horizontal and
vertical), for both the coaxial removal system and the dual duct
removal system.
Carefully study the diagrams representing the different types of
removal and select the one that best suits the conditions of your
installation. To choose the removal accessories required for each
installation, see the list of accessories on the NAVIEN price list.
Maximum Total Length
Pipe Diameter
Type
(mm)
Ø60/100
Coaxial
Ø80/125
Dual Duct
Ø80/80
Equivalent Length of Elbows and Adapters
Pipe Diameter
1.2
( mm)
Adapter
Ø60/100 ->
Ø80/125
Coaxial
Ø60/100
Ø80/125
Dual Duct
Ø80/80
34 Installing the Water Heater
Maximum
Orientation
Length (m)
Horizontal
20
Vertical
21
Horizontal
68
Vertical
70
Horizontal
110
Vertical
Equivalent
Elbow
Length (m)
-
0.5
45°
1.2
90°
2.4
45°
1.2
90°
2.4
45°
1.4
90°
2.2
3.6.6 Terminating the Flue
Before installing the water heater, determine what type of flue
termination is appropriate for the installation location and
situation. The subsections that follow describe some typical flue
configurations.
CAUTION
Minimum Clearance to Metering devices and Relief
equipment. Maintain a minimum horizontal clearance
of 1.22 m from electric meters, gas meters, regulators,
and relief equipment. Do not install the water heater
above or below electric meters, gas meters, regulators or
relief equipment unless a 1.22 m horizontal clearance is
maintained.
Hide quick links:
Advertisement
Table of Contents
