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Always consult accompanying technical sheet before
attempting these suggested solutions. Contact Watts
for further assistance if the solution cannot be found in
either the accompanying documentation or within this
troubleshooting guide.
Troubleshooting
No power to panels
a. Verify circuit breaker is not tripped and 120VAC
power is present at outlet.
b. Verify 120V power connection on panel is connected
to outlet and has power.
Panel not operating correctly
a. Verify circuit breaker is not tripped and 120VAC
power is present at outlet.
b. Verify 120V power connection on panel is connected
to outlet and has power.
c. Check that the snow melt sensor is connected at
tekmar control and all
operational functions are set properly (see
manufacturer’s instructions).
d. Verify there is fluid flow when circulators energize.
• Is the system air locked?
• Is the circulator running?
• Is 120V power present at circulator(s)?
Panel is functional but the boiler is not firing
a. Verify all power and fuel connections to boiler.
b. Check wiring connections from ProMelt Panel to
TT on boiler are present and correct; i.e. normally
open or normally closed (see boiler installation
instructions).
c. Check system pressure is at least 12psi.
d. Check the snow melt sensor connection at the relay
box verifying all operational functions are set properly
(see manufacturer’s instructions).
e. Verify there is flow.
• Is the system air locked?
• Is the circulator running?
• Is 120V power present at circulator(s)?
tekmar control is not operating correctly.
a. Verify circuit breaker is not tripped and 120VAC
power is present at outlet.
b. Verify 120V power connection on panel is
connected to outlet and has power.
c.
Check wiring connections to the tekmar control.
d. Check that the snow sensor is connected and all
operational functions are set properly (see tekmar
snow melting control manual).
e. Check settings on the tekmar control. Are they
the proper settings for the boiler type and system
requirements?
f. Check all wiring connections and resistance (Ohm
readings) on tekmar sensors (i.e. Boiler Supply
sensor, Boiler Return sensor, mix sensor and
Outdoor sensor). Ohm reading will change with
changes in temperature. See tekmar brochure for
ohm-to-temperature chart.
g.
Check that the system pressure is at least 12 psi.
Excessive boiler short-cycling.
a. Is primary circulator operating?
• Is there proper flow through the boiler?
• Are all ball valves open?
• Is there a wye-strainer on the boiler loop? If so, is it
clogged?
b. Is boiler set up and operating correctly?
c. Is boiler oversized for the heating load?