Thermon Ruffneck Assembly instructions

3. Contactor is burned or welded
3.1 Check the contactor for burn
marks and blackening. Replace
the contactor.
3.2 Check incoming power to the
heater to ensure there are no
voltage uctuations.
4. Heat exchanger is dirty
4.1 Clean the heat exchanger
using compressed air.
5. PRV has released
5.1 If there are signs that the
PRV has released uid, PRV
indicator is broken, blackening
around the PRV exit hole, or
there are uid stains visible on
the top louver, shut the unit
down immediately.
5.2 Check for restricted air ow,
bad motor, broken thermostat
or malfunctioned high limit.
Ruffneck™ Troubleshooting Tips
1. Heater is not operating
1.1 Check all fuses in heater
control box.
1.2 Check remote disconnect
switch and circuit breaker.
1.3 Check voltage supplied to the
heater – refer to the heater data
plate for voltage requirements.
1.4 Check thermostat by turning
it and check continuity with a
multimeter.
1.5 Check the condition of the
disconnect switch if the heater
is so equipped. Measure
continuity through the
disconnect by engaging the
switch.
1.6 Verify that there is a jumper
wire present between terminals
5 and 6 on the terminal block
located in the control box.
2. Contactor is chattering.
2.1 Check supply voltage.
2.2 Check wiring connections.
Tighten all loose electrical
connections.
2.3 Check thermostat for continuity
(See 1.4). If thermostat does
not break continuity, replace
thermostat.
CAUTION: DO NOT FORCE
CONTACTS CLOSED
CAUTION: DO NO USE WATER
TO CLEAN THE HEATER.
CAUTION: IF PRV HAS
RELEASED, SEND THE UNIT
IN FOR REPAIR OR
REPLACE THE CORE.

6. Heater is cold on top and warm
on bottom.
6.1 The core may have lost its
vacuum. Check the PRV for
signs of loss of uid and verify
that the PRV label indicator
is not broken. If PRV has
released, send the unit in for
repair or replace the core.
6.2 If the PRV does not indicate
loss of uid, the heater should
operate normally. Check for
loss of uid on a weekly basis
as a minimum.
6.3 The ambient temperature
may be too low. If the ambient
temperature is very cold the
top of the core will be colder
than the bottom – this is
normal.
7. Unit cycles on high limit—unit turns
on and turns off within less than
5 minutes.
7.1 Check and see if the PRV has
released uid. Core may have
lost most or all of its uid. If
PRV has released, send the
unit in for repair or replace
core.
7. 2 The core may be dirty, fan
may not be working or may
be turning the wrong way (the
fan must rotate clockwise
as seen from the front of the
unit) objects may be stuck in
the heat exchanger for drying
or warming up – remove any
items from the exchanger.
8. The Ground Fault Interrupter (GFI)
trips on the main panel, or heater
blows fuses
8.1 Check that you have a fuse of
the proper amperage rating.
8.2 Check for loose or frayed
wiring.
8.3 If condition is not observable,
send heater in for repair.
8.4 Change sensitivity of GFI.
9. The fan is turning but very little air
comes from the front of the heater.
9.1 Check fan rotation and ensure
that the fan turns clockwise
as seen from the front of the
heater. Refer to the Owner’s
Manual for more information.
9.2 Check motor winding
resistance and verify that they
are balanced.
9.3 Check fan blade set screws to
ensure fan blade is not loose on
the motor shaft.
CAUTION: DO NOT USE THE
HEATER AS A CLOTHES DRYER.
Ruffneck™Factory
5918 Roper Road
Edmonton AB T6B 3E1
Phone: [phone]
Fax: [phone]
Email: [e-mail]
www.thermon.com