Laars Pennant PNCP 1000 Installation And Operation Instructions Manual - page 19
Pennant Pool Heater
Page 19
control provides for part-load start-up and the second
control brings the heater to full rate, after the first
control has started the part-load burners.
To replace a control, shut off the 120-volt power
to the appliance. Remove the cover from the control
panel. Remove the electrical connectors from the
ignition control. Take out the controller’s mounting
screws, and pull the controller out. Replace in reverse
order.
7.2.8 Ignitors
The ignitors used are 120v “Hot Surface” type.
They are energized whenever there is a call for heat
and switched off when ignition is established and the
flame has been sensed. Pennant models 500, 750 and
1000 have one ignitor. Models 1250, 1500, 1750 and
2000 have two ignitors. To replace the ignitor, shut off
the 120- volt power to the appliance, remove the
ignitor access panel, disconnect the Molex connector,
remove the two mounting screws on the ignitor flange,
and pull the ignitor out. Install in reverse order,
always using a new ignitor gasket with the
replacement ignitor.
Caution
Ignitor gets hot.
7.2.9 Ignition Sensors
The ignition sensors ensure that the main flame
is ignited, so that raw gas is not allowed to fill the
combustion chamber. The ignitors are the ignition
sensors on Pennant appliances. There are no separate
ignition sensors.
7.2.10 Transformer
The Pennant’s transformer is not capable of
supplying control voltage for external devices. Should
a transformer need replacing, shut off the 120-volt
power. Unplug the transformer wires, remove the
mounting screws and remove the transformer. Replace
transformer in the reverse order.
7.2.11 Blowers
The combustion air blowers bring the
combustion air for the Pennant from the upper
chamber to the lower chamber. Mixing of the gas and
air occurs in the burners. If a blower change is
required, turn off the 120-volt power and gas supply to
the unit. Remove the front panel. Disconnect the
blower’s wire harness. Remove the screws at the
blower flange, and pull the blower out. Replace
blower in reverse order, ensuring that all joints are
made correctly. After replacement, ensure that the unit
operates properly, by following the set-up procedure
in this manual. Use caution in handling the blower,
ensuring you do not put pressure on the blower wheel.
7.2.12 Flow Switch
The unit uses a paddle-type flow switch to en-
sure the unit has water flow before ignition is allowed.
only need replacement in very rare cases. If filter
replacement is needed, it should only be replaced with
a factory part. Inspect the air filter. If there is debris on
the air filter, remove it from the filter box, and wash it
with mild soap and water. Ensure that the filter is
completely dry before re-installing, in reverse order.
7.2.3 Gas Valves
The gas valves are designed to operate with
supply pressures of 4-13 inches w.c. (1.0 to 3.2 kPa).
To remove a valve, shut off 120-volt power and
the manual gas shutoff valve. Remove the top front
panel from the unit. Disconnect the wires to the valve.
Disengage the flanged fitting before and after the
valve, and remove the valve. Re-install in reverse
order. Ensure o-rings are properly installed for both
inlet and outlet. Turn on manual gas shutoff valve and
120 volt power and check appliance operation and
tightness of gas valve connections.
7.2.4 Pool Loop High Limit Control
The high limit switch is an automatic reset
switch with an adjustable set point, up to 135°F
(57°C). To replace the switch, shut off the 120-volt
power to the appliance. Remove the cover from the
switch to access the mounting screws. Remove the
screws, and pull the switch off the control panel.
Remove the capillary and bulb from the thermal well
located in the pool loop adjacent to the heater outlet.
Replace in reverse order.
7.2.5 Automatic Reset High Limit Control
An automatic reset high limit is used to limit
heater water from exceeding 200°F. The high limit
switch has an adjustable set point, up to 190°F (88°C).
To replace the switch, shut off the 120-volt power to
the appliance. Remove the cover from the switch to
access the mounting screws. Remove the screws, and
pull the switch off the control panel. Remove the
capillary and bulb from the thermal well located in the
header. Replace in reverse order.
7.2.6 Temperature Control
The temperature control is a single stage control.
To replace the control, shut off the 120-volt power to
the appliance. Unplug all of the electrical connectors,
remove the retainer clip and the control. Replace in
reverse order.
7.2.7 Ignition Controls
The ignition controls ensure the proved
interrupted-type ignition system. They control the hot
surface ignitor(s) and prove that the flame signal is
appropriate for powering the gas valves. It also
controls the blower’s pre-purge and post-purge.
Pennant models 500, 750 and 1000 have one ignition
control. Models 1250, 1500, 1750 and 2000 have two
ignition controls. On these models, one ignition