CCI Thermal Technologies XGB - Explosion-Proof Forced Air Unit Heater - Manual (Page 8)

IMPORTANT:
THE PROPER MOTOR/FAN ROTATION, VIEWED FROM THE
REAR OF THE HEATER IS COUNTER CLOCKWISE FOR THE
SMALL CABINET UNITS AND CLOCKWISE FOR THE LARGE
CABINET UNITS, AS INDICATED BY THE FAN ROTATION
LABEL ON THE HEATER. INCORRECT ROTATION OF THE
FAN WILL CAUSE THE HEATER TO OVERHEAT AND CYCLE
ON THE HIGH LIMITS. CONSULT FACTORY IN CASE OF
INCORRECT ROTATION.
7.0 MAINTENANCE
7.1 The NORSEMAN™ explosion-proof unit heaters are designed
and constructed to operate in tough industrial applications with a
minimum of maintenance. However, some routine maintenance is
recommended to extend the life of the heater and its components
Always disconnect the electrical supply before performing
any maintenance.
7.2 Periodically inspect the heater installation to ensure that all
connections, fittings, plugs, screws, covers, etc. are tight and free
of corrosion.
7.3 Check the inside of the cabinet and around the element fins
for dust build-up and debris, especially after seasonal shutdowns.
Clean with an air blast or vacuum. Ensure that nothing is restricting
the air flow into the unit and that the fan blade is free to rotate.
7.4 MOTOR
The motor supplied with the small cabinet units is approved for
Class 1, Group D, Class II, Group E, F & G, T3B temperature code.
The motor supplied with the large cabinet units is approved for
Class I, Group C & D, Class II, Group E, F & G, T3B temperature
code. All motors have internal thermal protection to eliminate motor
overheating.
7.5 FAN BLADE
Visually inspect the fan blade to ensure it is free to rotate and
accidental damage has not occurred. If bent or damaged, a factory
balanced blade should be installed so that the rated airflow is
maintained. A damaged fan blade may not deliver the required
airflow over the elements, resulting in cycling on the high limit which
can significantly reduce the life of the contactor and the high limit.
7.6 HEATER CABINET
The XGB unit heater cabinet is stainless steel for superior corrosion
resistance. We recommend the cabinet be wiped down periodically
using a mild detergent.
7.7 OVERHEAT PROTECTION
In the event of fan failure, motor damage, excessive dust build-up
or restricted inlet airflow, the heater temperature may rise, causing
the limit controls to open, breaking the power supply to the heater.
All units are equipped with two automatic reset high limit controls.
Cycling of the high limits should not be permitted.
Should this occur, the unit should be inspected to determine the
cause of the cycling and the condition should be corrected.
8.0 REPLACEMENT PARTS LIST
The replacement parts list is included for reference only. Due to the
delicate nature of explosion-proof design, XGB unit heaters are not
field serviceable. Should any problem arise, return the unit to the
factory for service by trained personnel.
SMALL CABINET UNITS:
LARGE CABINET UNITS:
A CCI Thermal XTK thermostat kit may be purchased to replace a
broken thermostat. Refer to installation instructions provided with
the kit.
Transformers
High Limits
Motor
Contactor
Fan Blade
208V units
240V units
480V units
600V units
T2C T-Code units
T3A T-Code units
T3B T-Code units
All units
All units
10 & 7.5kW units
5 & 3.75kW units
208V units
240V units
480V units
600V units
T2C T-Code units
T3A T-Code units
T3B T-Code units
All units
All units
10 & 7.5kW units
5 & 3.75kW units
Transformers
High Limits
Motors
Contactor
Fan Blade
Control Fuse
208V units
240V units
480V units
600V units
T2C T-Code units
T2D T-Code units
T3A T-Code units
T3B T-Code units
208 - 480V 3Ø units
240V 1Ø units
600V units
All units
All units
All units
EXA50-23
EXA50-25
EXA50-36
EXA50-39
C12023-11
C12023-11
C12023-10
C12023-12
1699
1979
2433
42CF35AF
10873
MDL-0.6
Part No. 11110 - Rev. 02