lp-666 Rev. 003 Rel. 001 Date 2.25.20
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N. Optional 0-10 Volt Building Control Signal
1. A signal from a building management system may be connected
to the boiler to enable remote control. This signal should be a 0-10
volt positive-going DC signal. When this input is enabled using the
installer menu, a building control system can be used to control
the set point temperature or firing rate of the boiler. The control
interprets the 0-10 volt signal as follows; when the signal is between
0 and 1 volts, the boiler will ignite. As the signal continues to rise
towards its maximum of 10 volts, the boiler will increase in either
set point temperature or firing rate depending on the setting of
Function 17 in the Installer Menu. See this manual for details on the
setting of Functions 16 and 17 for this option.
2. Connect a building management system or other auxiliary control
signal to the terminals marked 0-10V+ and 0-10V– on the Field
Connection Board (shown in Figure 28). Caution should be used to
ensure that the 0-10V+ connection does not become connected to
ground.
O. Optional High Gas Pressure Switch
1. If an optional high gas pressure switch is used, it should be
installed on the side of the gas valve. This is normally closed and will
open if the pressure goes above 15.5” w.c. on the outlet side.
2. Locate the two pigtails hanging from the electrical box inside of
the boiler cabinet. Remove and discard the jumper plug from one of
the unused pigtails.
3. Connect the high gas pressure switch to the pigtail that you
removed the jumper plug from.
P. Optional Low Gas Pressure Switch
1. If an optional low gas pressure switch is used, it should be installed
on the side of the gas valve. This is normally closed and will open if
the pressure goes below 2” w.c. on the inlet side.
2. Locate the two pigtails hanging from the electrical box inside of
the boiler cabinet. Remove and discard the jumper plug from one of
the unused pigtails.
3. Connect the low gas pressure switch to the pigtail that you
removed the jumper plug from.
Q. Optional High Limit Manual Reset
NOTE:
Follow the more detailed instructions included with the high
limit manual reset kit for proper installation steps.
1. Thread the control well into the fitting provided on the manifold
using teflon thread tape.
2. Insert the control probe into the control well.
3. Secure the high limit manual reset box to the control well.
4. Locate and disconnect the red high limit manual reset wires in the
boiler harness from each other. Connect those two red wires to the
wires on the manual reset box.
5. When installation is complete, power up the boiler and test the
reset according to the provided instructions. If the reset operates
properly, set the high limit temperature as described in the provided
instructions. When done, create a demand and observe boiler
function to verify the installation is working properly.
pump input wire to 0-10VA+, and the negative wire to 0-10VA-.
NOTE:
When making wiring connections, ensure proper polarity or
the system will not operate properly.