Watlow FIREBAR Flange Heater - Manual (Page 5)

WATLOW IND.
FIREBAR® Flange Heater Installation & Maintenance Manual
I&M NUMBER: 316-42-2-1 Page: 5
Date: 6/11/2008 Rev: 2.00
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WATLOW IND.n # 6 INDUSTRIAL LOOP RD. n HANNIBAL MO, 63401n PHONE 573-221-2816 n FAX 573-221-3723
Troubleshooting
PROBLEM Cause / Correction
No power available to heater Check disconnect switch to ensure it is in the "ON" position
and that fuses are not blown. Replace fuses if they are blown
Fuses blowing Check heater electrical rating. Applied voltage may be wrong
Check fuse rating. Fuses should be at least 25% more than full
load amperage.
Disconnect heater power source. Check the heater resistance
to ground. This should be no less than 1 Megohm. Refer to
Megohm checking.
Not enough power Check line voltage to ensure it is within specification
Check full line current if voltage is correct. If line current is lower,
the heater may be wired wrong or has open elements
Fluid not heating to desired Not enough Kw
temperature Too much heat loss
High limit tripping / alarm Not enough fluid flow
Too much Kw
Line voltage higher than designed / allowable
Preventative Maintenance
CAUTION: HAZARD OF ELECTRIC SHOCK. TURN ALL POWER TO HEATER OFF, USE
APPROPRIATE DISCONNECT LOCKOUTS AND ALLOW SYSTEM/HEATER TO COOL BEFORE
PERFORMING ANY MAINTENANCE
!
Check line connections to make sure they are tight, free of oxide build-up, and that no dust or dirt build-up is
present. Retighten to 20 in-lbs as necessary.
Check enclosure (inside) for rust, dirt or dust. Remove rust if present, with steel wool (or equal) and
thoroughly blow clean with dry, oil-free air.
If enclosure is moisture resistant, check condition of cover gasket. A replacement can be obtained from the
factory.
Liquid immersed units should be removed from tank and checked periodically for scale build-up. Clean as
required. Scale can cause high sheath temperature and result in inefficiency and shortened life.
Thermal cycling may cause sealed joints to relax causing a leak. Tightening of heater plug should stop leak.
Replacement Parts
Reference the Flange Heater part number on the nameplate when ordering replacement parts.
Recommended spare parts would be : a Flange Heater and thermostat (if supplied).
Contact your local Watlow distributor for ordering replacement parts. Check the Yellow Pages under
"Electrical Heating Elements" in the largest industrial area nearest you.