Chapter 13 - External Modulating Control; Wiring The Modulating Controller; Acvmax Programming; Programming Of External Modulating Control - TriangleTube PRESTIGE Excellence 110 Installation & Maintenance Manual

CHAPTER 13 - EXTERNAL MODULATING CONTROL

The PRESTIGE Excellence can directly accept an analog
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 ACVMax
control module, as shown in Fig. 18 on page 32.. This
signal will both enable and modulate the boiler. No wir-
ing is required at the thermostat terminals.
External modulating control will only function if the
external modulating controller is properly wired to the
PRESTIGE Excellence 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
Heating Operation
Demand Type
Absolute Max CH Setpoint
CH1 Maximum Setpoint
CH1 Minimum Setpoint
Outdoor Curve Coldest Day
Outdoor Curve Warmest Day
CH2 Circuit
CH2 Maximum Setpoint
CH2 Minimum Setpoint
Warm Weather Shutdown
Circulation Pump Permanent
CH Post Pump Time
Freeze Protection
Frost Protection Setpoint
Parallel Shift Value
CH Call Blocking
Table 5 - Factory ACVMax Settings
FACTORY MINIMUM
DEFAULT SETTING
Enabled
Thermostat &
Outd. Curve
188°F [87°C] 68°F [20°C]
140°F [60°C] 68°F [20°C]
80°F [27°C] 60°F [15°C]
10°F [-12°C] -30°F [-34°C]
64°F [18°C] 60°F [15°C]
Enabled
68°F [20°C]
140°F [60°C]
60°F [15°C]
80°F [27°C]
Off
Off
Disabled
5 Minutes Off
Enabled
-22°F [-30°C] -22°F [-30°C]
0°F [0°C] 0°F [0°C]
2 Minutes 0 Minutes

13.2. ACVMax Programming

The ACVMax control module must be programmed to
accept the 0-10 VDC signal from the external modulat-
ing boiler control.
1. Use the Heating EZ Setup function to set CH De-
mand to 0-10V Modulation Signal. Reference Sec-
tion 9.7 on page 42.
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.
MAXIMUM
EZ SETUP RESET
SETTING
3
188°F [87°C]
188°F [87°C] 180°F [82°C]
188°F [87°C]
3
50°F [10°C]
78°F [25°C]
194°F [90°C]
3
190°F [88°C]
3
78°F [25°C]
3
20 Minutes
50°F [10°C]
144°F [80°C]
30 Minutes
INSTALLER RESET
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
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