Coates ST SERIES 5.5 & 11kW 240V SINGLE PHASE - Manual (Page 3)

3.0 CONTROL PANEL
A. INDICATOR
LIGHTS
The control has two indicator lights. The lights are
as follows:
STATUS LIGHTS
LIGHT DESCRIPTION ( when Illuminated )
FLOW Sufficient water flow through heater.
ELEMENT Heating elements are powered.
B. DIGITAL
THERMOSTAT CONTROL
For heaters equipped with a digital thermostat. The
digital thermostat control which measures the
temperature of the water as it enters the heater has
a MENU button, up and down adjustment buttons,
and an LED display. The desired water temperature
(set point) is controllable between 40°F and 104°F
(5°C and 40°C). The set point may differ from the
actual water temperature at the pool or spa due to
heat loss in the piping.
MENU:
The MENU button cycles through the three menu
items: Measured Water Temperature (default), SET
POINT and °F/°C.
ADJUSTING THE SET POINT:
Press one of the following buttons; MENU,
or .
The display will momentarily blank and then the
current set point will be displayed. Press the
or
button to change the set point. Hold the button
down for rapid temperature changes.
The set point will be saved and the display will return
to the measured temperature after two seconds of
inactivity.
OPERATION:
In the measured temperature mode, the water
temperature in the heater is displayed. The LED
corresponding to the current temperature scale will
be illuminated. If the heater is calling for heat the
HEATING LED will be illuminated.
FAHRENHEIT TO CELCIUS:
Press the MENU button twice and the current
temperature scale will be displayed ( F or C ). Press
the
or buttons to toggle between F and C.
The temperature scale will be saved and the display
will return to the measured temperature after two
seconds of inactivity.
ERROR CODE:
The display will read “Err” when it detects a
problem with the temperature sensor. This can be
caused by a faulty sensor or a loose connection
between the sensor and the temperature
controller.
3.1 CAUTIONS AND WARNINGS
1. Be sure to check all cautions and
warnings in this manual and as displayed
on the heater labels before operating or
performing and maintenance on these
heaters.
2. Do not remove the heater cover while
electrical power is applied to the heater.
Power must be interrupted at the heater
supply circuit breaker or disconnect
switch.
3. The MIN setting on the temperature
control dial is an OFF position. The heater
will not operate at this setting regardless
of water temperature.
3.2 STARTING THE HEATER
- CAUTION -
Do not operate heater without water.
1. Ensure that heater case is properly
grounded, and bonded.
2. Fill the system with water and start the
circulating pump.
3. Turn on electrical power at the heater
supply circuit breaker.
4. Set the temperature control to desired
water temperature and adjust accordingly
after the temperature has stabilized. DO
NOT EXCEED 104°F.
3.3 STOPPING THE HEATER
Turn off electrical power at the heater supply
circuit breaker before stopping the circulating
pump.
4.0 MAINTENANCE
1. Keep the heater clean.
2. If high temperature causes the limit
thermostat to cut off the electrical power,
turn off power at disconnect switch and
determine the cause before resetting the
switch. A water temperature drop is
required to allow resetting of the manual
reset high temperature limit.
3. If leaks develop in the heater or
connecting piping, shut down the heater
and repair defective connections.
4. If heating elements are removed for
replacement, use only Coates elements,
see Table 2.