Single-zone snow melt control installation and operation manual | 21
Boiler menu
The Boiler menu provides settings on how to congure and operate the boiler.
Field
Range Access Description Set to
App mode =
Boil
MOD,
1STG,
EMS1,
EMS2
Default =
MOD
Installer
BOILER TYPE — Shows the type of boiler
connected to the control.
MOD = Modulating boiler
1STG = Single one-stage on-off boiler
EMS1 = Boiler staging controls
EMS2 = Viessmann modulating boilers with 0-10
V OpenTherm Module
0-10 or 4-20
Default =
0-10
Installer
BOILER MODULATION TYPE — Selects if the
modulating boiler accepts a 0-10 VDC or 4-20
mA input signal to control the boiler firing rate.
Conditions: Boiler Type is set to MOD
(modulating boiler).
0 to 50%
Default =
0%
Installer
BOILER MINIMUM MODULATION — Shows the
minimum-percent modulation of the boiler burner.
Conditions: Boiler Type is set to MOD
(modulating boiler).
OFF, 10 to
180 seconds
Default =
OFF
Installer
BOILER MODULATION DELAY — Shows the
delay time between the burner firing and the
boiler releasing to modulation.
Conditions: Boiler Type is set to MOD
(modulating boiler).
30 to 230
seconds
Default =
30 seconds
Installer
BOILER MOTOR SPEED — Shows the time
required for the modulating actuating motor to
fully open the gas valve or ramp the burner fan
from off to full speed on a modulating boiler. Set
to 30 seconds unless otherwise recommended
by the boiler manufacturer.
Conditions: Boiler Type is set to MOD
(modulating boiler).
AUTO, 2 to
42ºF
(1.0 to
23.5ºC)
Default =
AUTO
Installer
BOILER DIFFERENTIAL — Shows the
temperature differential that the control is to use
to cycle the boiler on and off (half above and half
below target).
Conditions: Boiler Type is set to MOD
(modulating boiler) or 1STG (one stage).
OFF, 50 to
180ºF
(10.0 to
82.0ºC)
Default =
OFF
Installer
BOILER MINIMUM — Shows the minimum
allowed boiler target temperature. Check the
boiler manufacturer’s manual for recommended
supply water temperatures.
Conditions: Application Mode is set to Boil.
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