PEERLESS PureFire PF-80 Installation, Operation & Maintenance Manual page 41

3. Special Features:
The P F ® control offers several special features to
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give the installer options in setting up the boiler. These
options are shown in the following table and
described in detail later in this section.
Table 8.4: Control Features
Feature
Allows the installer to adjust the response time of the burner modulating control. This can be set differently for central
System Response Time
heating (CH) or domestic hot water (DHW) demands. This is known as "I" value.
Allows the installer to adjust the maximum firing rate of the burner modulating control. This can also be set differently
Maximum Firing Rate
for CH or DHW demands.
Cascade Up to 16 boilers can operate together in stages to satisfy the CH or DHW demand.
One Hour Retry One hour after a lockout on ignition, fan speed or flame failure, the P
Adjustable Blower
The blower postpurge may be increased to counteract the effects of high winds or unusual wind currents.
Postpurge
This troubleshooting tool captures the flame signal at four increments during the two second flame proving period. This
Flame Signal Log
will help service people to quickly diagnose problems with flame rectification.
Activates pumps if water temperatures fall below the specified value. If the temperature continues to fall, the burner is
Freeze Protection
activated.
Prevents the boiler from ramping up to high power if the control determines that the DHW demand is only due to tank
DHW Tank Warm Hold
standby losses.
Additional Safety
Allows the installer to choose between a low water cutoff and a flow switch for water level safety shutdown.
Functions
Vent Temperature Safety Reduces the firing rate if the exhaust vent temperature approaches the maximum limit of the vent material specified.
Limit The control will shut down the burner if the temperature continues to climb.
Automatically sets the reset calculation based on the type of heat distributions (finned tube baseboard, cast iron
System Type Presets
radiators, cast iron baseboard, low or high mass radiant).
Increases the boiler supply temperature target if the control determines that the load cannot be met at the current reset
Temperature Boost
temperature (Outdoor Reset Modes).
Warm Weather
Shuts down the boiler if the outdoor temperature exceeds an installer defined limit (Outdoor Reset Modes).
Shutdown
The P
Limited DHW Priority
remains present for an installer set switch time.
The P
System Test
and troubleshooting.
Fault History This mode is not used for most operations. Consult factory if needed.
BOILER CONTROL: INTERNAL WIRING & OPERATION
F ® control provides DHW priority for boiler operation. The control will switch back to CH if a demand
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F ® boiler will allow the installer to operate the boiler at low power, ignition power or high power for setup
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Description
F ® control will reinitiate boiler operation.
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