61
WHL-032 REV. 6.2.16
Program the Master Boiler:
To finish programming the cascade system, enter the Installer Mode on the Master Boiler ONLY. Scroll down to and select the following
parameters:
1.
30:Cr
–
MASTER ONLY
- Set cascade rotation mode to Automatic rotation or Timed rotation.
2.
31:Ct
–
MASTER ONLY
- Set system target temperature controlled by the system sensor (Range: 95-180
o
F, Default: 180
o
F).
NOTE
: To ensure proper operation, the boiler set point is defaulted at 20
o
F higher than the system set point to a maximum of
180
o
F
NOTE:
The Master boiler will display Er: 30 if the boilers are set on Cascade mode and a system sensor is not connected.
Boiler
setpoint will be the same as the system sensor setpoint until the issue is remedied.
See Installer Mode for details.
J. OUTDOOR TEMPERATURE MODE (OPTIONAL)
NOTE:
If the system requires a fixed operating temperature, the outdoor sensor is not required and should not be installed.
There is no connection required if an outdoor sensor is not used in the installation.
1. Use a minimum 22 AWG wire for runs of 100 feet or less and minimum 18 AWG wire for runs of up to 150 feet.
2. Mount the outdoor sensor on an exterior surface of the building, preferably on the north side in an area that will not be affected by
direct sunlight and will be exposed to varying weather conditions.
NOTE:
For correct mounting procedures, follow instructions provided with the sensor.
NOTE:
If sensor wires are located in an area with sources of potential electromagnetic interference (EMI), the sensor wires should be
shielded, or the wires routed in a grounded metal conduit. If using shielded cable, the shielding should be connected to the common
ground of the boiler.
NOTE:
Outdoor Temperature Mode Icon on the display will flash if an Outdoor Sensor or 0-10 Volt is not connected to the boiler.
See Figure 50 to set your Outdoor Reset Curve.
To check the CH Target Temperature while using Outdoor Temperature Mode, press the
button while the boiler is operational and
the display panel is powered on.
Figure 50
– Outdoor Reset Curve – See Installer Mode for Curve Setting Descriptions
Содержание WBRU 100W Series
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