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Instinct Installation Manual

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Table Of Contents
CHAPTER 8 - WIRING
42
CAUTION
1.
Remove the factory-installed brown jumper wire at
the Manual Reset Limit terminals that will accept
the additional boiler limit.
2.
Remove the factory-installed orange jumper wire at
the Auto Reset Limit terminals that will accept the
additional boiler limit.
3.
Connect the external limit wires to the Manual Reset
Limit or Auto Reset Limit low voltage terminals locat-
ed on the lower right corner of the CTRLMax control
module housing as shown in
Fig. 25 on page 41.
8.3.7
External Modulation Control
The INSTINCT firing rate can be controlled by an external
modulating boiler controller. See
Chapter 13 on page
69
for external modulation signal wiring and setup.
8.3.8
System Sensor Wiring
An optional system temperature sensor can be placed
on the central heating loop
to control the temperature
in
the
central
heating
loop
inst
ead
of
the
boiler
loop
.
When connected, the INSTINCT will automatically mod-
ulate to maintain the target temperature in the central
heating
loop
.
T
he
boiler
supply
t
emperatur
e
sensor
will
continue to be used as a high temperature limit.
Locate the system temperature sensor where it
can accurately measure the supply temperature to
the heating system. Inaccurate system tempera-
ture readings could lead to overheating or under
heating resulting in property damage.
1. Connect the system temperature sensor wires to
low voltage terminals X5-3&4 located at the bottom
of the CTRLMax control module as shown in
Fig. 25
on page 41.
8.3.9
Cascade Wiring - Optional
The CTRLMax control includes the ability to operate up
to six Solo boilers together as one without the need for
external controllers. Consult the Fig. 10 on page 20
for more information.
8.3.10
Modbus
The CTRLMax control includes the ability to
communicate with building management systems
(BMS) through a Modbus interface. Consult the
INSTINCT CTRLMax Control Supplement for more
information.
Modbus communication will only occur if the external
device is properly wired to the INSTINCT as follows:
X7-1 = RS-485 –
X7-2 = RS-485 Ground
X7-3 = RS-485 +
CHAPTER 8