Repair & Replacement - Modine Manufacturing HEX6 Series Installation, Parts, Service, And Maintenance Manual

I. REPAIR & REPLACEMENT
WARNING
Disconnect heater from power supply at integral
disconnect or fuse box before opening enclosures
WARNING
or servicing heater.
IF INTEGRAL DISCONNECT IS BEING SERVICED,
verify that power has been disconnected at fuse box
or main panel.
1. After repairing any component:
1.1 Check that electrical connections are correct
and secure (see Figure 9, page 10).
1.2 Remove any foreign material from enclosures
1.3 Install and secure all covers
1.4 Ensure that all fasteners are tight
1.5 Remove all foreign objects from heater
1.6 Ensure air exits through louvers and fan rotates
counterclockwise when viewed from rear of
heater (see Figure 14, page 18).
The heater core is vacuum charged and not field
repairable.
2. Core
For core removal:
2.1 Remove cabinet bottom and element enclosure
cover.
2.2 Disconnect all wires entering element enclosure
(see Figure 10, page 17).
2.3 Slightly loosen all cabinet bolts shown in
Figure 10, page 17, to prevent the core from
binding.
2.4 With an assistant supporting the weight of
the core, remove the 3 core mounting bolts.
Carefully lower the core out of the cabinet (see
Figure 11, page 17).
2.5 To return core to factory, use crate supplied with
exchange core to protect the element terminals
and plate threads.
2.6 To reinstall, lift the core up into cabinet while
an assistant guides the element wires into the
element enclosure conduit.
2.7 Position the core and tighten the 3 core
mounting bolts. Tighten the remaining cabinet
bolts.
Lock the switch in the
"OFF"
switch to prevent unexpected power application.
This heater should only be serviced by personnel with
heating and hazardous location equipment experience.
Loosen bolts only, do
not remove.
Control Enclosure
Conduit
Figure 10
Figure 11
(open) position and/or tag the
Remove this
core mounting
bolt & two others
on the opposite
side.
Control
Enclosure
Element
Enclosure
17 17