Coates 12406ST Installatie- en bedieningshandleiding - Pagina 3
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3.0 HEATER CONTROLS
The heater has a temperature controller adjustable
from 70°F to 104°F, one manual reset type high
temperature limit switch set at 118°F and a flow
switch to prevent operation of heater without water
flow.
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
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.
EXCEED 104°F.
3.3 STOPPING THE HEATER
Turn off electrical power at the heater supply circuit
breaker before stopping the circulating pump.
heater
case
is
properly
DO NOT
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
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.
5.0 OPERATION SEQUENCE
1. Power supplied to heater (Circuit Breaker).
2. Pressure switch closes (with sufficient flow
from pump).
3. Flow light illuminates.
4. Upper contactor closes. (High limit must
be closed)
5. Rotate temperature dial until it is greater
than water temperature.
6. Lower contactor closes.
7. Element
light
element(s) heat(s) the water.
in
the
heater
or
illuminates
and
the