Chapter 13 - External Modulating Control; Wiring The Modulating Controller; Ctrlmax Programming; Programming Of External Modulating Control - IDEAL EXALT Solo 110 Installation & Maintenance Manual

CHAPTER 13 - EXTERNAL MODULATING CONTROL

The EXALT can directly
0-10 VDC signal from an external modulating boiler
controller to control the firing rate.

13.1. Wiring the Modulating Controller

Run two 18 gauge wires from the external modulating
boiler controller's 0-10 VDC boiler output to low voltage
terminals X5-1&2 located at the bottom of the CTRL-
Max control module, as shown in Fig. 33 on page 49.
This signal will both enable and modulate the boiler. No
wiring is required at the thermostat terminals.
External modulating control will only function if the
external modulating controller is properly wired to the
EXALT as follows:
• X5-1 = +
• X5-2 = -
NOTICE
Ensure that the polarity of the connections
from the external modulating boiler controller
to the boiler are correct. Reversed polarity will
lead to no response from the boiler.
HEATING SETTING
EXALT Solo
Heating Operation
Thermostat &
Demand Type
Outd. Curve
Absolute Max CH Setpoint 185°F [85°C]
CH1 Maximum Setpoint 180°F [82°C]
CH1 Minimum Setpoint
Outdoor Curve Coldest Day 10°F [-12°C]
Outdoor Curve Warmest Day
CH2 Circuit
CH2 Maximum Setpoint 140°F [60°C]
CH2 Minimum Setpoint
Warm Weather Shutdown
Circulation Pump Permanent
CH Post Pump Time
Freeze Protection
Frost Protection Setpoint -22°F [-30°C]
Parallel Shift Value
CH Call Blocking
accept an analog
CTRLMax Factory Settings
FACTORY DEFAULT
EXALT Combi
Enabled Enabled
Thermostat &
Outd. Curve
185°F [85°C]
180°F [82°C]
80°F [27°C] 80°F [27°C]
10°F [-12°C]
64°F [18°C] 64°F [18°C]
Enabled Enabled
140°F [60°C]
80°F [27°C] 80°F [27°C]
Off Off
Disabled Disabled
5 Minutes 5 Minutes
Enabled Enabled
-22°F [-30°C]
0°F [0°C] 0°F [0°C]
2 Minutes 2 Minutes

13.2. CTRLMax Programming

The CTRLMax control module must be programmed
to accept the 0-10 VDC signal from the external
modulating boiler control.
1. Use the Heating EZ Setup function to set
CH Demand to 0-10V Modulation Signal. Reference
Section 9.7 on page 56.
13.3. Programming of External Modulating
Control
The external modulating control must be programmed
to send 2 VDC to enable the boiler and run it at low fire,
and 10 VDC to run the boiler at high fire. Once the con-
trol enables the boiler, it must wait 30 seconds to allow
the burner to stabilize before modulating the boiler.
MINIMUM MAXIMUM
EZ SETUP RESET
SETTING SETTING
68°F [20°C] 188°F [87°C]
68°F [20°C] 188°F [87°C]
60°F [15°C] 188°F [87°C]
-30°F [-34°C] 50°F [10°C]
60°F [15°C] 78°F [25°C]
68°F [20°C] 194°F [90°C]
60°F [15°C] 190°F [88°C]
Off 78°F [25°C]
Off 20 Minutes
-22°F [-30°C] 50°F [10°C]
0°F [0°C] 144°F [80°C]
0 Minute 30 Minutes
INSTALLER RESET
✓
✓ ✓
✓
✓ ✓
✓ ✓
✓
✓
✓
✓ ✓
✓ ✓
✓ ✓
✓
✓
✓
✓
✓
✓
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