3
Rinnai New Zealand
HD250i Combination Flueing Installation: 0-08
General Information
Before Installation
Existing Flue or
Chimney
Ensure HD250i Can
Be Easily Removed
Other Supplier Flue
Components Can
Not Be Substituted
Clearance for
Exhaust Flue
Components
Flue Must Be
Supported
Flue Terminal
Clearances
Connecting Flue
Components
Maximum Flue
Length and
Number of 90°
Bends
Not to be Confused
with Direct Flueing
Inspect each flue component for damage. Do not attempt to fix or install
any damaged components.
Do not connect with any existing flue or chimney. Do not common flue
with the flue pipe of any other water heater or appliance.
For servicing, repair or replacement, ensure the Rinnai HD250i can
be removed without causing damage to the installation. This can be
achieved by using an adjustable flue component (FFHD250PIPEADJ) as
the first section on top of the appliance.
The Rinnai HD250i is a direct flue water heater and is only certified
and listed with Rinnai flue components (excluding air inlet and
protective mesh). Do not combine or use flue components from other
manufacturers. Only the flue components identified in this installation
manual are to be used for horizontal, vertical and combination flueing.
The exhaust flue components are single skin and need to maintain a
25mm clearance from combustibles as per NZS 526:2003 2.6.2..
Flue must be supported and be independent of the appliance.
Ensure positioning of the flue terminal and flue installation comply
with NZS 5261:2003, ‘Table 16 - Minimum clearances required for flue
terminals shown in figure 3’.
Flue connections must be firmly pressed together so that the gaskets
form an air tight seal.
Number
of 90°
Bends
Maximum
Flue
Length
Dip Switch Setting*
0
2.5m
If the length is < 6.5m then move the dip switch no. (SW) to ON
0.5m
If the length is < 5.0m then move the dip switch no. (SW) to ON
2
8.5m
If the length is < 3.0m then move the dip switch no. (SW) to ON
3
7.0m
-
4
5.0m
-
5
3.5m
-
6
.5m
-
* Duct resistance varies with flue length so dip switch settings need to be adjusted to
vary the fan speed.
Components for this Rinnai flueing application cannot be interchanged
with the Rinnai Direct Flueing solution. Direct flueing is for installations
where the HD250 Internal is mounted directly on the inside of an
external wall (cannot be extended).