Page 14
POOL PRODUCTS
SECTION 6.
Electrical
CAUTION
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation.
Verify proper operation after servicing.
6.1 General Information
Wiring connections must be made exactly as
shown in the wiring diagram found on the inside of the
heater (see Figure 14). The heater must include a
definite means of grounding. There is a bonding lug on
the right side of the heater, where a bond wire must be
attached.
6.2 Main Power
Electrical wiring must be in accordance with the
latest edition of the National Electric Code (NEC),
ANSI/National Fire Protection Association (NFPA)
70, unless local code requirements indicate otherwise.
The heater comes factory-wired intended for
use with 115 VAC, 60 Hz, single phase field
electrical supply (voltage may vary by ± 10%).
Do not attempt to connect the heater to any
other type of electrical source. Doing so will
damage the heater and void the warranty.
Electrical connections must be done by a certified
electrician only, as with all wiring.
CAUTION
Do not provide power to the heater from the high
voltage side of a time clock or pump relay. Doing so
may cause damage to the heater or surrounding
plumbing.
To wire the Laars XL-3 heater to a 115V/60
Hertz (Hz) electrical source:
1.
Remove the door of the heater.
2.
Remove the screws that hold the connection box
cover and remove the cover.
3.
Connect the wires from the power source to the
leads on the right side of the heater in the
connection box. Connect the ground wire to the
ground screw at the bottom of the connection
box that is labeled for that purpose.
NOTE:
No external junction box is required.
Run all field-supplied wires in conduit to the
knockout at the bottom of the ON/OFF switch box.
A separate lug is on the exterior of the heater for
a system bonding conductor as required by Article 680
of the National Electric Code, ANSI C1 -1975.
6.3 Bonding
CAUTION
This heater must be connected to a bonding grid with
a solid copper wire not smaller in diameter than 8 ga.
The National Electrical Code and most other
codes require that all metallic components of a pool
structure, including reinforcing steel, metal fittings and
above ground equipment be bonded together with a
solid copper conductor not smaller than a number 8
wire. The heater, along with pumps and other such
equipment must be connected to this bonding grid. A
special labeled bonding lug is provided on the right side
of the heater to accommodate this requirement.
6.4 Auxiliary Time Clock Wiring
Electrical wiring must be in accordance with the
latest edition of the National Electric Code (NEC),
ANSI/National Fire Protection Association (NFPA)
70, unless local code requirements indicate otherwise.
A time clock which will automatically turn the
pool system OFF and ON provides convenience and
safety, and is more economical. If you install a time
clock to control the filter pump operation, it is
recommended that the time clock have its own low
voltage (Firemans) switch to turn off the heater
before turning off the pump . The switch should shut
off the heater about 15 minutes before the filter pump
shuts off. This allows the water flow to carry away
residual heat in the firebox without damage to the
heater or other parts of the system and increase
efficiency by removing any residual heat contained in
the heat exchanger and directing it back to the pool.
To install a time clock auxiliary switch into the
heater circuit, follow these instructions:
1.
Remove heater door.
2.
Locate and remove the wire nut at the fireman
switch connection. The connection has a tag
identifying the wires and showing instructions for
the connection.
3.
Run the wires to the heater through the knockout
on the right side of the heater body.
4.
Connect the low voltage wires from the time
clock auxiliary switch to the two wires of the
fireman switch connection. Use American Wire
Gage (AWG) No. 14 gauge stranded copper
wire with a temperature rating of 227°F (105°C)
or greater. Position the field-installed wires away
from the inner panel.