PeerlessBoilers PF-50 Installation, Operation & Maintenance Manual page 32

BOILER CONTROL: INTERNAL WIRING & OPERATION
3. Pump Modes:
The P F boiler allows four different pump modes
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to give the installer flexibility in piping arrangements.
Table 8.3: Pump Modes
Pump
Display Text
Mode
0 DHW or CH & DHW pump
1 General pump with 3-way valve
2 Manifold with pump for DHW
3 Manifold with 3-way valve for DHW
4. 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.
Table 8.4: Control Features
Feature
Freeze Protection
DHW Tank Warm Hold
Additional Safety Functions
Vent Temperature Safety
Limit
Outdoor Reset
Temperature Boost
Warm Weather Shutdown
Anti-Cycling
Limited DHW Priority
DHW Heat Dump
Service Notification
System Test
Fault History
30
The General pump is on when the CH pump runs on CH demand.
The DHW pump runs on DHW demand. Either the CH or DHW pump
runs; they never run at the same time.
The General pump is always on when burner is on. A line voltage
(120 VAC) 3-way valve is operated to supply water to the DHW tank.
The General pump is always on when the burner is on. The CH
pump runs on CH demand. The DHW pump runs on DHW Demand.
Either the CH or DHW pump runs; they never run at the same time.
This mode is not available at this time.
Activates pumps if temperatures fall below the specified value. If the temperatures
continue to fall, the boiler is activated.
Prevents boiler from ramping up to high power if the DHW demand is only to keep
the tank warm. This feature is only available if the optional tank sensor is used.
Allows the installer to choose between a low water cutoff and a flow switch for
water level safety shutdown. The default setting is "Low Water Cutoff" and a
factory installed jumper is supplied with the boiler. This jumper should be
replaced with a low water cutoff in jurisdictions where it is required.
Reduces the firing rate if the vent temperature approaches the maximum limit of
the vent material. If the vent temperature continues to climb, the P
will shut down the boiler.
The P F control changes the boiler supply target temperature to compensate
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for changes in load due to milder outdoor temperatures. This increases the
efficiency of the boiler and is more comfortable.
The temperature boost function increases the boiler supply target to recover more
quickly from setback conditions.
The P F control will shut down the boiler's CH functions if the outdoor
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temperature is above an installer defined maximum. This prevents the boiler
from running during warm weather.
The anti-cycling function prevents rapid on/off cycling of the boiler. This includes
an override function to be sure that all loads are satisfied.
The P F control provides DHW priority for boiler operation. However, the
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control will automatically switch between CH and DHW loads after an installer
determined switch time.
If enabled, the DHW heat dump function serves to dump heat from the boiler
system to the DHW tank after a CH demand has ended.
If enabled, the P F control will display a service notification after an installer
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defined number of hours or cycles. It can also display a notification based on a
date of the installers choosing.
The P F boiler will allow the installer to operate the boiler at low power,
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high power or ignition input for testing and analysis.
The P F control allows service personnel to access the last 15 Blocking
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Errors and the last 15 Lockout Errors in addition to records of the interval
between Errors.
Brief Description
Brief Description
Detail
Page
Section
8.C.1
8.C.1
8.C.1
8.C.1
Detail
Section
8.C.3
8.E.3
8.C.4
F control 8.C.2
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8.D.3
8.D.3
8.D.4
8.D.4
8.E.2
8.E.4
8.F
8.G
8.H
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