lp-672 Rev. 000 Rel. 002 Date 10.3.18
46
Hotter water increases the risk of scald injury. Scalding may occur within 5 seconds at a setting of 140
o
F (60
o
C). Water temperature over
125
o
F can instantly cause severe burns, or death, from scalds. Children, disabled, and elderly are at the highest risk of being scalded. See
instruction manual before setting temperature at appliance. Feel water before bathing or showering!
NOTE:
The optional On Demand Recirculation kit can be used to activate recirculation when unit is set to Internal or External Recirculation
Modes.
Figure 53 - Recirculation Programming Screens
Setting
Detail
Description
Smart Auto-Learn
(Default Internal / External
Recirculation Mode Function)
When set in Smart Auto-Learn, the pump will run in the Pulse Function for the first seven
(7) days. During this period the water heater will monitor and record hot water usage
patterns. After the initial seven (7) day learning period, the water heater will use the
preceding week’s usage pattern to cycle the pump and preheat the water.
Recirculation Program 1
Pro1 is a factory set recirculation setting with day and time values. This setting can be
customized for your installation. Day and Time can be programmed.
Default: 4 - 9:30 AM, 4 - 7:30 PM
Recirculation Program 2
Pro2 is a factory set recirculation setting with day and time values. This setting can be
customized for your installation. Day and Time can be programmed.
Default: 6 - 7:30AM, 6 - 7:30 PM
Recirculation Program 3
Pro3 is a recirculation setting that can be completely customized for your installation.
Day and Time can be programmed. There is no default setting.
Pulse
In Pulse, the pump runs for a set time every hour to internally or externally maintain
hot water temperature on selected days. The burner will turn on during this period
if the heat exchanger water temperature drops below the Recirculation Differential
Temperature (15:So).
Range: 1 – 60 minutes, Default: 10 minutes.
Table 25 - Recirculation Function Overview
1. Smart Auto-Learn Recirculation Function
a. Enter Status Display by pressing and holding button
for five seconds at Standby Mode.
b. Turn the dial button to the N:TS screen. Press the
button to open the Recirculation Functions.
c. Press the
button at the “Auto” screen to select the Smart Auto-Learn Recirculation Function. See Figure 54.
d. The water heater is now in Smart Auto-Learn Recirculation Function.
Figure 54 - Set Auto-Learn Recirculation Function
2. Pro1, Pro2, Pro3, and PULS Recirculation Function
a. Enter Status Display by pressing and holding button
for five seconds at Standby Mode.
b. Turn the dial button to the N:TS screen. Press the
button to open the Recirculation Functions.
c. Turn the dial button at the “Pro1”, “Pro2”, “Pro3”, or “PULS” screens to select a Recirculation Function. See Figure 55 A. Press the
button
to select the mode.
d. Press the
button to enter the day setting. See Figure 55 B.
NOTE:
In all Recirculation Functions but Pulse: When Recirculation is operational and the burner turns off, the pump will continue to run for
seven (7) minutes and stop for three (3) minutes. This cycle will repeat until the burner turns on or the recirculation timer ends.
