Nortec MES2 - Manual (Page 28)

25 | Operation
Humidifier Configuration
The MES2 is factory configured to operate under most conditions without the need for any
changes to its configuration. If required several settings can be made using jumpers on the
MES2’s control board. The output of the MES2 can also be reduced by using a potentiometer
on the MES2’s control board. See Figure 21: MES2 Control Board Jumpers for location of
jumpers and the capacity adjustment potentiometer.
Note: Nortec recommends not making any configuration changes unless they are required and
that any changes to the MES2’s settings be performed by a qualified technician.
Figure 21: MES2 Control Board Jumpers
Table 6: MES2 Control Board Jumpers
Jumper Installed Removed
J1 550-600 V No Affect
J2 440-480 V No Affect
J3 380-415 V No Affect
J4 277V No Affect
J5 220-240 V No Affect
J6 200-208 V No Affect
J8 HWS setting for 380-600 V No Affect
J9 HWS setting for 200-277 V No Affect
J10 On/Off Operation Modulating Operation
J13 2-10 VDC or 4-20 mA* modulation 0-10 VDC or 0-20 mA* modulation
J15 GFI on, power relay off during drain GFI off power relay on during drain
J26 Modbus control enabled Modbus Control disabled
P11 (2-3) Self test at start up disabled Self test at start up enabled
* mA modulation control requires a 500 ohm resistor installed between pins 1-2 of P5 control signal input terminal (see Figure 18:
Control Wiring.
Modulation
Offset & GFI
J13 & J15
On/Off or
Modulating
J10
Potentiometer
Capacity
Adjustment
J1 - J6
Mains
Voltage
Select
J8 & J9
HWS Voltage
Modbus
Control
J26
P11
P11 (2-3)
Disable Self Test