Instructions / Assembly

53
WHL-590 REV. 7.27.16
program specific recirculation functions by day and time to circulate and heat water when the user most needs hot water. See
Recirculation Functions, this manual, for details.
To set Recirculation Modes:
1. Installer Mode will activate when is pressed and held for five seconds while the water heater display is powered Off.
2. Turn the dial to O:RC. Press the Dial button . “ ” will flash when the O:RC setting is ready to be changed.
3. Turn the dial to select “ ” to shut off Recirculation Mode, “ ” to use Internal Recirculation, “ ” to use External
Recirculation, or “ ” to turn on Preheat Mode. Press the dial button to select the setting and return to the Installer Mode.
Figure 47 – Internal / External Recirculation Mode Screens
Setting
Detail
Description
Recirculation Mode Off
Turns off Recirculation Pumps and Preheat
Mode
(Factory Default)
Preheat Mode
Turns on Preheat Mode
Internal Recirculation Mode
Turns on Internal Recirculation
External Recirculation Mode
Turns on External Recirculation
Table 26 – Internal / External Recirculation Mode Overview
4. When finished, press to exit this menu and turn power back on. Proceed to Step 2 to program recirculation functions.
NOTE: The Recirculation Functions below do not refer to the “ ” or “ ” settings. In the setting, the water heater
automatically turns on and meets the DHW setpoint temperature when the internal temperature falls below the differential setting (15:
So).
I. RECIRCULATION FUNCTIONS – USING RECIRCULATION MODES – STEP 2
NOTICE
Before setting the Recirculation Function, go into the Installer Mode and change 0: RC from to (Internal Recirculation
Mode) or (External Recirculation Mode). Recirculation Mode will not work if it is not activated in Installer Mode. See Tables 26
and 27 for details.
The following section details the various Recirculation Functions.
NOTE: When External Recirculation Mode is active and there is no hot water demand, DHW temperature is limited to 125
o
F (51
o
C).
This is intended to decrease the risk of scalding. The water heater will heat water to temperatures greater than 125
o
F (51
o
C) if the DHW
set-point is higher than 125
o
F (51
o
C) and there is a demand for hot water.
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 water heater. Feel water before bathing or showering!
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.