3.
The single bolt mounting is not designed for high
dynamic loads that can occur during transportation. For
heaters that are to be installed prior to transportation, it
is recommended that temporary blocking or strapping
be used to limit movement of the heater with respect
to the mounting structure. Inspection of the mounting
bolt for correct tensioning is also recommended after
arrival at site to ensure no loosening has occurred
in transportation. The mounting bolt/nut should be
torqued to 65 – 75 ft-lbs, refer to Table 4 - Recommended
Torque Specifications, page 13.
4.
Install the bracket on the heater with hardware provided.
0.1
Orient the heater to its final position before tightening
all hardware.
0.2 In higher vibration installations use of a removable
thread locking compound such as Loctite® 243TM
Blue Threadlocker is recommended.
0.3 Correct tensioning of the mounting bolt will include
full compression of the split lock washer and
inspection for correct thread engagement. The
mounting bolt/nut should be torqued to 65 to 75 ft-lbs.
5.
The discharge air louvres are individually adjustable.
6.
The heater is CSA approved to operate with vertical down
flow or horizontal air flow discharge. Refer to Figure 1 –
Mounting Clearance, page 4 and Table 2 – Installation
Height & Heater Weight, page 4 for vertical down
flow and horizontal air flow mounting recommendations.
B.3
Electrical
WARNING
WARNING.
Disconnect heater from power supply at
integral disconnect or fuse box before opening enclosures
or servicing heater.
Lock the switch in the “OFF” (open) position and tag the
switch to prevent unexpected power application.
This heater should only be serviced by qualified personnel
with electrical heating equipment experience.
Install and use the heater in accordance with local codes
and this manual.
1.
General
0.1 Use only approved copper conductors for installation.
Refer to Section G - Technical Data, page14 and heater
data plate for conductor rating.
0.2 The power supply may be single or three phase as
shown on the nameplate. Wiring diagrams are located
on the inside of the control cabinet door (or refer to
B.4 Sample Wiring Schematics - RGX Series Heater,
page 8.
2.
Field Wiring
0.1 Select a conduit style and conduit entrance
fitting suitable for EEMAC 12 (dust tight and drip
tight - indoor) applications. This is important since
contamination of the control cabinet interior could
significantly reduce the operating life of the control
components.
0.2 Remove the cabinet door to facilitate electrical access
and connection.
0.3 The control cabinet of the heater is constructed to
EEMAC 12 standards and as such, we are not permitted
to supply knockouts. After selection of the conductor
and conduit entrance sizes, punch the appropriate
hole into the control cabinet. We recommend
the hatched area indicated in Figure 1 – Mounting
Clearance "Wiring Entrance Area - Top View", page
4 be used for ease of internal electrical connection.
0.4 Grounding - a ground lug is located beside the
terminal block. Ensure the unit is properly grounded
before energizing.
0.5 The heater is completely prewired internally. Connect
the power conductors and any control conductors
to the terminals as illustrated on the wiring diagram
located inside the control cabinet door.
3.
Motor Rotation - Important
0.1 Three phase heaters are supplied with motors of
corresponding phase. The proper motor/fan rotation,
viewed from the rear of the heater is counter clockwise.
Incorrect rotation of the fan will cause the heater to
overheat and cycle on the high limit. To reverse the fan
rotation, interchange two supply voltage conductors
connected to lugs L1, L2.
4.
Temperature Control
0.1 Built-In Thermostat - heaters with a factory installed
thermostat have all other standard controls such as
contactors, and transformers factory installed and
prewired.
0.2 Thermostat Kit Fat-8A - (Field installed) Install the FAT-
8A thermostat kit in accordance with the instruction
sheet provided.
0.3 Remote Line Voltage Thermostat - A remote
thermostat rated to operate as a pilot duty, inductive
device on 240V is required. For proper installation
and wiring of the selected thermostat, refer to the
manufacturer's instructions. Thermon can supply
appropriate thermostats.
0.4 Remote Low Voltage Thermostats - The heater can be
provided with a low voltage control internally wired
for remote connection to 24V thermostats. Ensure
that this control option is installed in the heater before
energizing a low voltage thermostat from the heater.
For proper installation and wiring of the selected
thermostat, refer to the manufacturer's instructions.
Thermon can supply low voltage thermostats for use
with heaters.
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