andrews MAXXflo EVO Series Installation And Maintenance Manual page 15

3.5 SYSTEM SCHEMATIC EXAMPLES (CONTINUED)
EXAMPLES 1 & 2: SINGLE AND PARALLEL MAXXfl o EVO (SETUP)
(SUPPLIED BY OTHERS)
L N PE L N
Parameter settings table:
Menu Parameter
DHW 1660
Pump release
1661
Pump repeat cycle
1663
Circulation setpoint
Technical Data
E
1 2 3 4
Settings
Set the desired option for activation of the circulation pump, normally activated with time
program 4 (DHW) or independent of DHW via time program 5
When enabled, the circulation pump will switch on and off during the activation period (10
minutes on and then off repeatedly for 20 minutes). This function is particularly useful when
the heat losses on the return pipes are high and the burner works continuously for a long
time, with little or no hot water draw off .
Default set point is 45
O
return temperature during pump activation time. Each time the temperature obtained by the
sensor drops below the circulating setpoint, the pump continues to run until the setpoint is
reached (minimum duty cycle is 10 minutes). During a legionella cycle, the temperature on
the sensor is used to set the dwell time, ensuring that the entire tap water system reaches
the legionella setpoint for the total set dwell time. The dwell time counter is not started until
the temperature on the sensor reaches the legionella setpoint.
5 6 7 8
9
C. When the B39 sensor is installed, the controller will check the DHW
15
NO CO NC NO CO NC
MAXXfl o EVO