4
Thermostat
The heater thermostat located on the front of the unit,
may be set for any desired spa temperature.
Maximum Temperature Setpoint
(Knobstop Adjustment)
Adjustment to a different maximum setting is a simple
task. Loosen the small set screw on the knobstop and
rotate the knobstop ring until vertical “stop” tab is at the
desired maximum setting. Retighten the set screw.
ELECTRICAL
The GFCI devices shall be of the self-contained types,
circuit breaker types or the receptacle types. Feeder
ground-fault protection is not required where GFCI is
already provided in the branch circuits or receptacles
supplying power to the heater.
Electrical Disconnect
An electrical disconnect and over-current protection
device must be provided in accordance with local
codes. Keep wire runs as short as possible to mini-
mize voltage drop. Bring wires of size indicated from a
fused disconnect switch (customer furnished) with an
amp rating of at least 125% of the amp rating shown
on the spa heater nameplate. A ground lug is provided
for connection to the supply ground. A wiring diagram
of the heater is shown at right. It is also affixed to the
inside front cover of the units.
Field Wiring
Heater requires three-wire service. With 240 VAC
there are two hot wires and a grounding conductor.
Even when metallic conduit is used, the grounding
conductor must be run to the supply ground.
Field wiring connections are made to the electrical
entry at the left side of the unit. A hole in the jacket is
provided for a 1” trade size conduit hub. The location
of the field wiring box is shown below. Wire nuts are
used to connect all leads except the grounding con-
ductor, for which a pressure lug is provided.
Recommended Wire Sizes
for Field Connection
Use type THWN copper wire to the unit, with the AWG
wire sizes (Internal wire sizes may differ) listed in Table
A on the following page.
CAUTION:
High chemical concentrates from feed-
ers and chlorinators that are out of adjustment will
cause very rapid corrosion to the heater. Such dam-
age is not covered under the warranty.
TYPICAL COMFORTABLE
TEMPERATURE
RANGE FOR POOLS
TYPICAL COMFORTABLE
TEMPERATURE
RANGE FOR SPAS
WARNING:
The power supply circuit to this heater
shall be protected by a ground-fault circuit interrupter
(GFCI), in accordance with Art. 680 of the latest edi-
tion of the National Electrical Code (NEC). Failure to
do so could result in severe personal injury or death.
NOTE:
Heater grounding conductor shall be the
same or larger than the live power supply conductor.
Summary of Contents for ELS 1102-2
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