LAARS Heating Systems
Page 14
spade (fork) terminal. From the other side of the main
power switch connect to the main terminal block using
a ¼" female insulated quick connect. This will be the
same position where the jumper had terminated (see
Figure 7). Connect N2 and Ground to the main
terminal block using ¼" female insulated quick
connect (refer to Figure 7).
5.1.4 Auxiliary Time Clock Wiring
If a time clock is used to control the pool filter
pump operation, a separate switch or relay must be
used to shut off the heater at least 15 minutes before
the filter pump is shut off. A remote switch or relay,
if installed, should be connected across the “Other
Ints” terminals on the field-wiring terminal strip (see
Figure 9) after removing the factory-installed jumper
from those terminals. For manual shut off, a switch is
provided and identified with a label on the right side
of the heater.
All field-installed electrical safety devices and
controllers may also be connected across the
Pennant’s “Other Ints” terminals after the factory-
installed jumper is removed. If a remote switch or
relay (mentioned above) is installed, the other field-
installed electrical safety devices and controllers
should be wired in series with that switch or relay.
5.1.5 All Sizes
Wiring diagrams are shown in Section 10 in
Figures 13 through 17. Field wiring is shown in
Section 10 in Figure 18.
IMPORTANT NOTE:
If the backwash operation is
manual the heater must be shut off manually during
backwashing.
5.2 Temperature (Operating) Control
The Pennant temperature control operates by
measuring the pool loop return temperature, before the
heater inlet piping. It is adjustable to a maximum of
104° F and will prevent heater operation at return
temperatures above 104° F. It also controls the pool
heater pump and the temperature of the water entering
the heat exchanger. It also controls the Pennant pump
operation and the mixing system, which tempers the
water entering the heat exchanger to prevent damage
from condensation. The sensors for the control are
installed as shown in Figure 6 and Section 4.3, Sensor
Locations. The automatic mixing system sensor, already
installed, is shown in Figure 5. During operation, the
automatic mixing system diverts water from the outlet to
the inlet to “pre warm” the water to a minimum inlet
temperature of 120°F. This prevents condensation from
forming, which can damage the heater.
5.3 Programming the Temperature
Control
5.3.1 Temperature Control Overview
The digital display on the control has the
following uses:
•
To display the actual pool loop temperature
during normal operating mode.
•
To allow the user to view and adjust the
control settings.
Figure 8 identifies the control buttons.
The Pool Heater Temperature Control face
contains an LCD screen and four (4) buttons (see
Figure 8). The LCD screen will display the pool loop
return temperature during normal operation. When the
control is first powered up, it displays
. It then
displays the temperature at the pool loop sensor. After
the temperature is displayed, the current settings
(parameters) may be viewed. To scroll through the
parameters, press the down arrow button to advance to
the next parameter.
5.3.2 Programming Control Parameters
There are four (4) control parameters that may be
set. They are the Pool Loop Temperature (LSP), the
Pool Loop Temperature Differential (dLS), the Boiler
Temperature (bsp) and the Pump Off Delay (Pd).
The pool loop temperature (desired pool temp-
erature) is set by changing the LSP parameter. After
scrolling through the parameters until LSP is displayed,
press the enter button. The setpoint will be displayed.
Press the up arrow or down arrow buttons until the
desired setpoint is displayed. Press the enter button and
the setpoint will be activated. The display will return to
indicating the present pool loop temperature.
In addition to the ability to set the pool loop
temperature, the differential associated with that
setting may also be adjusted. The differential is set by
changing the dLS parameter. After scrolling through
the parameters until dLS is displayed, press the enter
Figure 7. Removing Jumpers.
Summary of Contents for PNCP
Page 30: ...LAARS Heating Systems Page 30 Figure 10 Sheet Metal Components...
Page 31: ...Pennant Pool Heater Page 31 Figure 11 Internal Components...
Page 34: ...LAARS Heating Systems Page 34 Figure 14 Pennant 1250 2000 Ladder Diagram...
Page 35: ...Pennant Pool Heater Page 35 Figure 15 Pennant 500 1000 Wiring Schematic...
Page 36: ...LAARS Heating Systems Page 36 Figure 16 Pennant 1250 1500 Wiring Schematic...
Page 37: ...Pennant Pool Heater Page 37 Figure 17 Pennant 1750 2000 Wiring Schematic...
Page 38: ...LAARS Heating Systems Page 38 Figure 18 Field Wiring...
Page 39: ...Pennant Pool Heater Page 39...
