Dip Switch Settings And Operation - Zehnder Rittling VS Series Installation, Operation And Maintenance Manual

Dip switch settings
and operation
40
Dip switch 1
Test Mode=Off
Normal Mode=On
Test mode: Test mode is used
to speed-up the operation
sequence of the unit, therefore
creating a more timely
troubleshooting technique.
All time delays are shortened by
ten times with the exception of
the high pressure lockout which
is instantaneous regardless
of which mode the switch is
positioned to. Dip switch 1 must
be placed into the normal mode
to resume proper operation of
the unit.
Dip switch 2
FP1-15 °F=Off/FP1-32 °F=On
Water side freeze protection
setting: Dip switch 2 is used
to determine the loop freeze
protection setting. Depending
on the brine concentration of the
liquid source, the temperature
can be set at 15 °F or 32 °F.
The switch MUST be set to the
"on" position if pure water is
used as the source brine. This is
normally the case in open loop
systems. Set the dip switch to
the "off" position for closed loop
systems that contain a brine
concentration that allows liquid
temperatures to fall to, or below,
15 °F.
Dip switch 3
Tstat-Comm=Off
Tstat-24VAC=On
Thermostat selection: Dip
switch 3 is used to select
the type of thermostat that
will be used to control the
unit. A digital communicating
thermostat can be purchased
with the unit that will allow all
fault signals to be displayed
on the thermostat. This allows
for efficient troubleshooting
and does not require that the
technician access the electrical
control box to determine the unit
error. If a digital communicating
thermostat is used, dip switch 3
must be set in the "off" position.
If a 24VAC thermostat is used,
set dip switch 3 to the "on"
position.
Dip switch 4
RV-Cooling=Off
RV-Cooling=On
Reversing valve operation: Dip
switch 4 is used to determine
the reversing valve position in
the cooling mode (de-energized/
energized). This function is used
only when a 24VAC thermostat
is used and is determined by
the reversing valve output of the
thermostat in the cooling mode.
If the thermostat de-energizes
the reversing valve in the cooling
mode, set the dip switch to the
"off" position. If the thermostat
energizes the reversing valve in
the cooling mode, set the dip
switch to the "on" position.
Dip switch 5
Com2=Off/Bacnet or Lonworks
Com1=On/Communicating
Thermostat
Dip switch 6 Protocol setting 1
Dip switch 7 Protocol setting 2
Dip switch 8 Protocol setting 3