Boiler Control Instruction & Operation Manual
Page 2
2
of 68
Installation
Energy Management Interface
The control system has a full featured ability to interface with an Energy Management System (EMS). The
control system allows remote control and monitoring via RS485 Modbus or through direct wiring.
Figure 16
:
Remote
Demand
Setup
Screens
(From Display
“Press” Menu > EMS Interface > Remote Demand to access)
Factory
Setting
Range /
Choices
Parameter and Description
Local
Local,
4-20mA,
Modbus
Modulation Source
The boiler can modulate (vary boiler heat input) based on local or remote (4-20mA or
Modbus) signals. Modulation begins after the start sequence finishes and the boiler is
released to modulate. Modulation Source has the following selections:
Local
Local setpoint and control is used to create firing rate.
4-20mA
Input wired to J8 terminals 6 and 7 is used as modulation rate.
Modbus
Modbus signal is used as modulation rate.
Local
Local,
4-20mA,
Modbus
Central Heat & Lead Lag Setpoint Source
The setpoint may be based on local (customer entered value or outdoor reset) or
remote (4-20mA or Modbus) signals. Setpoint Source has the following selections:
Local
User entered CH Setpoint or Reset Curve provides the setpoint.
4-20mA
Input wired to J8 terminals 6 and 7 is used as setpoint.
Modbus
Modbus signal is used as setpoint.
Local
Local,
Modbus
CH Demand Switch
The Central Heat demand (Central Heat Enable/Disable) can be directly wired to the
Control or provide by the Modbus interface.
Local
Central Heat demand is present when a contact closure is received
between J8 terminals 1 and 3 .
Modbus
Modbus signal provides demand.
Local
Local,
Modbus
LL Demand Switch
The Lead Lag Master
’s demand (Central Heat Enable/Disable) can be directly wired to
the Control or provide by the Modbus interface.
Local
Lead Lag demand is present when a contact closure is received
between J8 terminals 1 and 3 .
Modbus
Modbus signal provides demand.
130 F
50
– 185 F
Central Heat 4-20mAdc Setup, 4 mA Water Temperature
Sets the Central Heat Temperature Setpoint corresponding to 4 mA.
180 F
50
– 185 F
Central Heat 4-20mAdc Setup 20 mA Water Temperature
Sets the Central Heat Temperature Setpoint corresponding to 20mA.
1
Disable PW M to
4-20mA PW M to
0-10V
LL Rate to 4-20mA
LL Rate to 0-10V
Analog Rate Tracking
–
allows external system to monitor firing rate.
Disable
No signal is sent to terminals
PW M to 4-20mA
Firing rate provided using 4-20mA signal
PW M to 0-10V
Firing rate provided using 0-10V signal
LL Rate to 4-20mA
Sequence Master demand is provided using 4-20mA signal
LL Rate to 0-10V
Sequence Master demand is provided using 0-10V signal
