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FROST PROTECTION NOTE
The Control helps provide freeze protection for the boiler
water. Boiler flue gas condensate drain is not protected from
freezing. Since the Control only controls the system and
boiler circulators individual zones are not protected. It is
recommended that the boiler be installed in a location that is
not exposed to freezing temperatures.
Table 43: Frost Protection
Device
Started
Start
Temperatures
Stop
Temperatures
Boiler &
System Pump
Outside Air < -22°F (-30°C)
Supply Water < 45°F (7.2°C)
Outside Air > -18°F (-28°C)
Supply Water > 50°F (10°C)
Boiler
Supply Water < 38°F (3.3°C) Supply Water > 50°F (10°C)
X. Operation
D. Multiple Boiler Control Sequencer (continued)
D. Multiple Boiler Control Sequencer
1. “Plug & Play” Multiple Boiler Control
Sequencer
When multiple boilers are installed, the Control’s
Sequencer may be used to coordinate and optimize
the operation of up to eight (8) boilers. Boilers are
connected into a “network” by simply “plugging in”
standard ethernet cables into each boiler’s “Boiler-To-
Boiler Communication” RJ45 connection.
2. Sequencer Master
A single Control is parameter selected to be the
Sequencer Master. The call for heat, outdoor and
header sensors, and common pumps are wired to the
Sequencer Master “enabled” Control.
3. Lead/Slave Sequencing & Equalized Run Time
One boiler is a “Lead” boiler and the remaining networked
boilers are “Slaves”. When demand is increasing, the
Lead boiler is the first to start and the Slave boilers are
started in sequential order (1,2,3,…) until the demand
is satisfied. When demand is decreasing, the boilers are
stopped in reverse order with the Lead boiler stopped
last (…,3,2,1). To equalize the run time the sequencer
automatically rotates the Lead boiler after 24 hours of
run time.
4. Improved Availability
The following features help improve the heat availability:
a. Backup Header Sensor: In the event of a header sensor
failure the lead boiler’s supply sensor is used by the
Sequence Master to control firing rate. This feature
allows continued coordinated sequencer control even
after a header sensor failure.
b. “Stand Alone” Operation Upon Sequence Master
Failure: If the Sequence Master Control is powered
down or disabled or if communication is lost
between boilers, individual boilers may be setup
to automatically resume control as a “stand alone”
boiler.
c. Slave Boiler Rate Adjustment: Each slave boiler
continues to monitor supply, return and flue gas
temperatures and modifies the Sequence Master’s
firing rate demand to help avoid individual boiler
faults, minimize boiler cycling and provide heat to
the building efficiently.
d.
Slave Boiler Status Monitoring: The Sequence Master
monitors slave boiler lockout status and automatically
skip over disabled boilers when starting a new slave
boiler.
5. Customized Sequences
Normally, boilers are started and stopped in numerical
order. However, custom sequences may be established
to optimize the heat delivery. For example, in order to
minimize boiler cycling, a large boiler may be selected
to run first during winter months and then selected to
run last for the remainder of the year.
6. Multiple Demands
The Sequence Master responds to Central Heat, Auxiliary
Heat DHW and frost protection demands similar to the
stand alone boiler. For example, when selected and
DHW priority is active, the sequence master uses DHW
setpoint, “Diff Above”, “Diff Below” and pump settings.
7. Shared or Isolated DHW Demand
When the Indirect Water Heater (IWH) parameter is set
to “Primary Piped” the Sequence Master sequences all
required boilers to satisfy the DHW setpoint (default
180°F (82.2°C). When “Boiler Piped” is selected only
the individual slave boiler, with the wired DHW demand
and pump, fires to satisfy the DHW setpoint
.
8. Manual Reset Limit Devices
If any below listed limit opens, the boiler will restart
only after the limit closes and the boiler control
manual reset button is depressed. During boiler
start sequence, air proving switch must prove open
before blower starts and closed after blower starts.
If air proving switch is not in the required position,
the control waits for a preset time period and then
shuts down with a manual reset hard lockout.
• Thermal link – opens if rear of combustion
chamber overheats; one time use device
• Burner door thermostat – opens if burner door
overheats, manual reset button on thermostat
• High and low gas pressure switches (if used, size
500-800 only) – open if gas pressure is outside
of preset limits, manual reset button on each
switch
• Air proving switch – opens if inadequate air flow
is detected prior to ignition
• Device(s) connected to Man Reset External
Limit terminals
9. Central Heating System Frost Protection
When enabled, Frost Protection starts the boiler and
system pump and fires the boiler when low outside
air and low supply water temperatures are sensed.
The Control provides the following control action
when frost protection is enabled:
Summary of Contents for Phantom-X PHNTM399C
Page 49: ...49 106309 03 4 19 VI Water Piping and Trim continued Figure 28 Near Boiler Piping Heating Only...
Page 63: ...63 106309 03 4 19 VIII Electrical continued Figure 40 Ladder Diagram...
Page 64: ...64 106309 03 4 19 VIII Electrical continued Figure 41 Wiring Connections Diagram 2...
Page 73: ...73 106309 03 4 19 IX System Start up continued Figure 47 Operating Instructions...
Page 124: ...124 106309 03 4 19 XIII Service Parts continued...
Page 130: ...130 106309 03 4 19 XIII Service Parts continued...
Page 133: ...133 106309 03 4 19 XIII Service Parts continued 10A 10B 10C 10D 10G...
Page 139: ...139 106309 03 4 19...
