CCI Thermal Technologies XPA - Explosion-Proof Panel Heater - Manual (Page 5)

5
5.0 WIRING
5.1 Whenever hazardous materials are present,
ensure that the junction box covers are secure
before energizing the heater. Follow all applicable
national and local codes for hazardous location
installation. The XPA heater is available with
a terminal housing. A terminal housing may
be required by national and/or local codes for
hazardous locations.
5.2 Use supply wires suitable for 221°F (105°C).
5.3 Use approved conduit and conduit seals as
required by the national and local codes for
hazardous locations.
5.4 To provide maximum protection, each XPA
heater should be fused individually using
HRC fuses.
5.5 All heaters come factory prewired ready
for direct connection to power supply leads
(see Figure 16).
(i) Connect the power leads to terminals
marked L1 and N or L2.
(ii) Connect the ground wire to the ground
connection located in the heater junction
box cover.
5.6 Replace junction box cover securely. Do not
over-tighten.
FIGURE 16 - WIRING DIAGRAM -
XPA CONVECTION HEATER
WARNING
WHENEVER HAZARDOUS MATERIALS ARE
PRESENT, ENSURE THAT THE TERMINAL
HOUSING COVERS, PLUGS, ETC., ARE
SECURED (BUT NOT OVER-TIGHTENED)
BEFORE ENERGIZING THE HEATER.
CAUTION
ALL CIRCUITS MUST BE IN THE OPEN
POSITION BEFORE REMOVING JUNCTION OR
TERMINAL BOX COVERS.
CAUTION
USE SUPPLY WIRES SUITABLE FOR 221°F
(105°C). SUPPLY WIRES ARE TO BE FUSED
WITH APPROPRIATELY SIZED HRC FUSING.
WARNING
USE APPROVED CONDUIT AND CONDUIT
SEALS AS REQUIRED BY HAZARDOUS
LOCATION STANDARDS.
CAUTION
ENSURE THAT NO POWER IS CONNECTED
TO THE EQUIPMENT PRIOR TO MAKING
ANY CONNECTIONS.
6.0 WIRE GUARD (OPTIONAL)
6.1 Install wire guard by inserting wire arms into
holes on heater fins.
7.0 START-UP
7.1 If the unit contains a junction box ensure the
junction box lid is securely installed onto the
terminal housing.
7.2 Check to ensure that all plugs, screws, and
covers are securely in place.
7.3 Check associated electrical equipment.
7.4 Check that all wall mounting bracket connections
are tight.
7.5 Turn on supply power.
7.6 If the unit is equipped with an adjustable
thermostat, dial the temperature
required by twisting the thermostat knob.
WARNING
TO PREVENT UNSAFE OPERATION OF THE
HEATER DO NOT EXCEED THE MAXIMUM
ALLOWABLE AMBIENT OPERATING
TEMPERATURE OF 104°F (40°C).
8.0 MAINTENANCE
8.1 Check the following before every heating season:
WARNING
DISCONNECT POWER FROM THE
HEATER BEFORE PERFORMING ANY
MAINTENANCE. FAILURE TO DO SO CAN
RESULT IN PROPERTY DAMAGE, INJURY
OR DEATH.
(i) Remove junction box cover and inspect
the electrical connections. Ensure the
connections are tight and wires are not
burned or frayed.
(ii) Inspect the heater and its surroundings.
Make sure that heater clearances are
maintained and no debris is around the
heater or stuck in the fins.
(iii) Check all mounting hardware and ensure
fasteners are tight.
(iv) Replace the cover securely and turn on the
power supply.