Polaris BSS, Инструкция по эксплуатации, Страница: 14 / 63

14
CONTROLS AND SWITCHES
This model is provided with two pressure switches. These switches
are essential to the safe and proper operation of the unit. All switches
are wired in series. The controller is set up to shut the unit down
whenever there is a failure of any of the switches. It is important to
understand the purpose of each switch.
Blocked Outlet
Switch
Blocked Intake
Switch
34 GALLON UNIT
Blocked Outlet
Switch
Blocked Intake
Switch
50 GALLON UNIT
Figure 4
BLOCKED OUTLET SWITCH
The Blocked Outlet Switch is set up to shut the unit off when a build-
up of positive pressure in the exhaust vent pipe occurs. This switch
is a positive pressure switch that requires an increase in pressure to
change the electrical contacts from normally closed to open. When
this switch prevents the unit from igniting, most likely the exhaust is
blocked by some means. Check to see if the condensate is allowed
to flow freely from the exhaust elbow and for obstructions in the
exhaust venting and exhaust vent terminal. Also verify that the vent
length does not exceed the maximum allowed as shown in Planning
the Vent System beginning on page 23.
BLOCKED INTAKE SWITCH
The Blocked Intake Switch is set up to shut the unit off when a build-
up of negative pressure in the intake air pipe occurs. This switch
is a negative pressure switch that requires an increase in negative
pressure to change the electrical contacts from normally closed to
open. The switch is connected to the pressure tap on the PVC pipe
connected to the inlet of the blower. When this switch prevents the
unit from igniting, most likely the intake is blocked. Verify that the
integrated filter on the intake air connection, the intake air pipe,
and the intake air termination are free of obstructions that may
prevent air from entering the unit. Also Verify the intake air pipe
length does not exceed the maximum allowed in Planning the Vent
System beginning on page 23.
WATER HEATING ENABLE/DISABLE SWITCH
IMPORTANT:
The Enable/Disable switch listed in this manual is
NOT an “on/off” switch and does not disconnect 120 volt power to
the CCB and other heater components.
When in the “Disabled” position the switch removes electrical power
from the gas control valve so that water heating is disabled. The
display, CCB, and other electrical components will still be energized
and the display will read “Water Heating Disabled”.
SPARK IGNITER
The Spark Igniter is a device that ignites the main burner by spark.
When high voltage is applied to the igniter, spark is generated to
ignite the main burner.
CONFIGURATION KEY
The configuration key is located inside the control box. It
provides for the ability of the heater to retain information
collected over its lifetime, even if the control board is replaced
because of failure.
The configuration key should stay with the heater.