Instinct Installation Manual

CHAPTER 8 - WIRING
41
8.3.2 Low Voltage Connections
Line and Low Voltage wiring should be separated to
prevent possible electrical noise on the low voltage
circuits. Line and Low Voltage wiring should use
separate electrical knockouts on the INSTINCT cabinet
and should remain separated inside the INSTINCT.
NOTICE
CH and DHW call connections to the INSTINCT
require a dry contact with no external voltage
present. Ensure no external voltage is present on
each set of wires before connecting to the INSTINCT.
If external voltage is present, the use of an isolation
relay is required to prevent damage to the CTRLMax
controller.
8.3.3 Thermostat Wiring
The CTRLMax control has two thermostat call inputs for
multiple zone / temperature systems. This allows each
call to have its own outdoor reset curve and maximizes
the efficiency of the system.
NOTICE
Simultaneous CH1 and CH2 calls will result in
the INSTINCT operating at the highest target
temperature.
8.3.4 Outdoor Sensor Wiring
The Outdoor Reset function and Warm Weather Shut-
down (WWSD) features require the connection of the
included outdoor temperature sensor. See
Chapter 12
on page 67
for outdoor sensor installation and setup.
8.3.5 Domestic Hot Water Wiring
The Domestic Hot Water terminals can accept either
a call from an aquastat (thermostat) or temperature
sensor. Use of the included indirect water heater sensor
is
r ecommended .
1. Connect the DHW aquastat or temperature sensor
wires to low voltage terminals X4-1&2 located at the
bottom of the CTRLMax control module as shown
in Fig. 25 on page 41.
8.3.6 Additional Boiler Limits
A dditional boiler limits (H igh T emperatur e Limit, L W C O ,
etc.) can be wired into either the Manual Reset Limit
or Auto Reset Limit terminals of the INSTINCT. These
limit connections will provide a “hard” lockout requiring
a manual reset of the INSTINCT or a “soft” lockout in
which the INSTINCT will automatically reset when the
limit resets.
A Manual Reset External Limit Open (E87) lockout will
occur anytime the manual reset terminals are open. An
Auto Reset External Limit Open (76) lockout will not
occur until just before ignition when the auto reset
terminals are open. The Auto Reset terminals should
be used for any type of burner interlock such as a
combustion air louver or water flow proving switch.
NOTICE
Fig. 25 - Low Voltage Connections
• The Manual Reset Limit and Auto Reset Limit
terminals are located on the lower right corner
of the CTRLMax control module housing.
• Manual Reset Limit and Auto Reset Limit
connections to the INSTINCT require a dry
contact with no external voltage present.
Ensure no external voltage is present on each
set of wires before connecting to the INSTINCT.
If external voltage is present, the use of an
isolation relay is required to prevent damage to
the CTRLMax controller.
Low voltage
connections
External limit
Terminals
CHAPTER 8