28
9.
Ignition Electrode
: This electrode is located on the left
side of the burner door. A high voltage charge is
provided by the external spark generator to provide
spark for lighting the burner.
10.
Combustion Air Blower
: The combustion air blower
has two connections. There is a 120 Volt power
connection (3-wire) and a low voltage control
connection (4-Wire). Disconnecting the control wires
will run the blower at full speed.
11.
External Spark Generator:
The generator is located
on the inside of the electrical panel above the main
control. It receives 120 volts from the main control
and transforms it into a high voltage spark across the
ignition electrode.
12.
PC Communication Adapter (Green Plug):
This
connection allows Factory Engineers to review control
settings and view advanced diagnostic features.
13.
Domestic Supply Sensor:
This component is located
on the lower left side of the CHB unit. It is the same
10 k
Ω
NTC immersion sensor with a bayonet style
connection as the return sensor. The control uses this
sensor to target the domestic hot water setpoint when
the unit is operating in DHW mode.
14.
Rotary Flow Sensor:
This component is located on
the CHB unit just to the left of the pump cartridge.
When a flow greater than 0.4 gallons per minute is
detected the boiler will fire in DHW mode to provide
domestic hot water.
15.
Stepper Motor:
The stepper motor is located in the
CHB behind the flow sensor. The motor controls the
position of the diverting valve in the CHB that
determines where the boiler loop supply water can
flow. The stepper motor defaults to the DHW position
for faster response times.
16.
Pressure Sensor:
The pressure sensor is located on the
left hand side of the CHB unit. It provides a live
readout of the system pressure to the main control
and user interface. The control will not operate the
boiler if the pressure falls below 11.6 psig. This feature
is acceptable as a LWCO in some locations. Check
your local codes.
17.
Pump Cartridge:
The pump is located on the CHB
unit. The Series PBC™ boiler is equipped with a
Grundfos UPS15-78 pump head that provides all
internal flow requirements for the boiler. It can be
replaced by any UPS series pump cartridge.
ELECTRICAL CONNECTIONS
Maximum Amp Draw for Circulator pumps on the
PBC-34/40/52™ is 3.5 amps total for boiler pump and
CH pump.
NOTICE
IF the fuse blows in the boiler control, a spare fuse
(found in a holder on the control cover) can be used
as a replacement. DIAGNOSE POSSIBLE CAUSES
FOR BLOWN FUSE BEFORE REPLACING. Additional
fuses can be ordered as need from your Peerless
Boiler Distributor (Part #5562). See Figure 7.2 for
location of Boiler Control fuse and spare fuse.
NOTICE
Summary of Contents for PBC-34
Page 22: ...20 WATER PIPING AND CONTROLS Figure 4 6 Recommended Central Heat Piping...
Page 23: ...21 Figure 4 7 Recommended Domestic Hot Water Piping WATER PIPING AND CONTROLS...
Page 31: ...29 Figure 7 2 Wiring Schematic and Connection ELECTRICAL CONNECTIONS...
Page 45: ...E LIGHTING OPERATING PROCEDURES 43 START UP PROCEDURE...
Page 57: ...THIS PAGE INTENTIONALLY LEFT BLANK...
Page 60: ...58 REPAIR PARTS Figure 13 2 PBC 34 Combustion Components...
Page 62: ...60 REPAIR PARTS Figure 13 3 PBC 40 and PBC 52 Combustion Components...
