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3.4.1 Selecting a Recirculation Mode ("AWE"
model only)
On all "AWE" model Navien water heaters, you can choose from
two pre-heating modes: internal recirculation mode or external
recirculation mode. To select a recirculation mode, you must set
the DIP switches on the front panel, and set the position of the
2-way valve inside the water heater. By default, the DIP switches
are set to OFF.
When the optional ComfortFlow recirculation mode is
activated, energy consumption increases because the water
heater operates to maintain the water temperature within the
circulation loop. You can use the Navien Intelligent Preheating
feature, set the timer on the optional Remote Controller to
reduce energy consumption.
The recirculation feature of the "AWE" models has three
performance advantages:
Elimination of any hot/cold/hot stacking—the "cold water
water wasted.
When using external recirculation mode with the
Note
built-in pump, observe the following maximum
pipe is recommended):
- 15mm Copper Pipe- 30 m of equivalent length
- 20mm Copper Pipe- 150 m of equivalent length
Lengths in excess of these limits will require an
external recirculation pump.
22 Installing the Water Heater
Internal Recirculation Mode
To use the internal recirculation mode:
1. Connect the water supply.
2. Set the 2-way valve inside the water heater to "INT. "
3. Set the front panel DIP switches at the far left (set of 10) to:
1—ON; 2—OFF.
ON
1
2
3
4
5
CAUTION
Do not remove recirculation cap. (Internal Recirculation
Mode)
ON
6
7
8
9
10
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