AERCO Esteem Boiler with EZ-Set Controller - Manual (Page 122)

GF-135 Esteem 399 Low NOx Boiler
Chapter 18
OMM-0089_0A Installation, Operation & Maintenance Manual Controller Operation
18.3.2 Demand Type (Default: Switch & Outdoor Reset)
Figure 18-8: DEMAND TYPE Menu
Demand Type allows the installer to select how a CH Demand is generated. Press the UP or
DOWN buttons to select the CH Demand Type then press the OK button to store the setting.
The CH Demand options are:
• Switch & Outdoor Reset: A central heating call from a dry contact switch will enable the
boiler and the setpoint will vary with the outdoor temperature for central heating calls.
• Switch & Setpoint: A central heating call from a dry contact switch will enable the boiler
and the setpoint will be fixed for central heating calls.
• Constant & Outdoor Reset: The boiler will maintain setpoint and the central heating
circulators will be constantly enabled without an external call from a dry contact switch. The
central heating circulators will be disabled when the outdoor temperature exceeds the
Warm Weather Shutdown Temperature setting. The setpoint will vary with the outdoor
temperature for central heating calls.
• Constant & Setpoint: The boiler will maintain setpoint and the central heating circulators
will be constantly enabled without an external call from a dry contact switch. The central
heating circulators will be disabled when the outdoor temperature exceeds the Warm
Weather Shutdown Temperature setting. The setpoint will be fixed for central heating calls.
• 0-10V Modulation Signal: This option allows the boiler firing rate to be controlled by an
external control system with a 0-10 VDC signal.
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Page 122 of 188 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0089_0A
MC1 06/19/14 Ph.: 800-526-0288