Nailor 37S Manual page 135

Wiring Diagrams
A specific wiring diagram for each heater including all controls is glued to the inside of the control panel door. Another wiring diagram is
provided loose in the control box.
Heater Element Rack Replacement For Series Fan Powered Terminal Units
Heater Rack
Header Plate
Element
Terminations
On series fan Powered Terminal Units, the element rack is removable for replacement. The header plate is located behind a
hinged door enclosure on the side of the terminal electric heater section.
1. Turn off power supply before servicing.
2. Locate the element rack header plate.
3. Before removing wires from the element rack header plate, mark where the wires are connected so they can be
reconnected correctly on the new element rack.
4. Remove the wires and screws holding the heater plate in the coil housing.
5. Insert the new element rack into coil housing and replace the screws to secure the element rack.
6. Replace the wires.
7. Replace the enclosure cover before turning on the power.
6/20 IOM-EHVAV (Supercedes 4/02)
Nailor Industries Inc. reserves the right to change any information concerning product or specification without notice or obligation.
Figure 4: Typical Line Voltage Control Enclosure Box
Figure 5. Typical element rack for a series Fan Powered Terminal Unit
Heating Elements
Arrowhead Insulators
Auto-reset high limit cut-outs
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