Low Voltage Connections; Thermostat Wiring; Outdoor Sensor Wiring; Domestic Hot Water Wiring - IDEAL EXALT Solo 110 Installation & Maintenance Manual

CHAPTER 8 - WIRING

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 EXALT cabinet and
should remain separated inside the EXALT.
NOTICE
CH and DHW call connections to the EXALT
require a dry contact with no external voltage
present. Ensure no external voltage is present
on each set of wires before connecting to the
EXALT. 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 EXALT operating at the highest target
temperature.
Low voltage
connections

Fig. 33 - Low Voltage Connections

8.3.4 Outdoor Sensor Wiring

The Outdoor Reset function and Warm Weather
Shutdown (WWSD) features require the connection of
the included outdoor temperature sensor. See Chapter
12 on page 75 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 recommended.
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. 33 on page 49.

8.3.6 Additional Boiler Limits

Additional boiler limits (High Temperature Limit, LWCO,
etc.) can be wired into either the Manual Reset Limit
or Auto Reset Limit terminals of the EXALT. These limit
connections will provide a "hard" lockout requiring a
manual reset of the EXALT or a "soft" lockout in which
the EXALT 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.
• 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 EXALT require a dry
contact with no external voltage present.
Ensure no external voltage is present on
each set of wires before connecting to the
EXALT. If external voltage is present, the use
of an isolation relay is required to prevent
External limit damage to the CTRLMax controller.
Terminals
NOTICE
49