Engineering Documentation

Appendix A – Discontinued Products
Terminal Equipment Controllers (APOGEE Legacy Controllers)
125
-3002 217 | 231
Metal Oxide Varistors (MOVs)
Metal Oxide Varistors (MOVs) must be used across the DO terminals when connected
to loads. MOVs are factory-installed in all FLN products.
When installing MOVs across the DO relay contacts on termination boards, keeping
the MOV leads as short as possible makes the MOV more effective at reducing spikes
from field wiring or controlled devices. Remove and reinstall any MOVs with leads
longer than 1 in. (2.5 cm). See the section Controlling Transients [➙ 23] for MOV part
numbers.
Terminal Equipment Controllers (APOGEE Legacy
Controllers)
Wire Type Requirements
TEC Wire Type Requirements.
Circuit Type Class Wire Type (AWG) Distance Conduit Sharing
1
Input Power 2 Check local codes Check local codes Class 2
Digital Output 2 Check local codes 150 ft (46 m) Class 2
Analog Output 2 Check local codes 150 ft (46 m) Class 2
Digital Inputs 2 No. 18 to No. 22 TP 150 ft (46 m) Class 2
Analog Inputs 2 No. 18 to No. 22 TP 100 ft (30 m) Class 2
Room Temperature Sensor 2 Pre-terminated 3 TP 100 ft (30 m) Class 2
1)
Conduit sharing rules were determined through EMI and shared conduit testing. These rules indicate wiring methods that have
no adverse effect on the proper operation of the equipment, but do not necessarily indicate compliance with local codes.
Power Source Requirements
TECs can be powered in three ways. Correct sizing and fusing must be maintained for
each of these powering techniques:
● Individual transformer using a transformer rated for Class 2 service.
● Power trunk. For more information, see the section Power Trunk Guidelines
[➙ 64].
● Low voltage source of the device the controller is controlling (for example, fan
powered boxes, electric room heat, fan coils, and heat pumps).
CAUTION
The phase of all devices on a power trunk must be identical.
Phase differences can destroy equipment. Any relays, EPs, or contactors sharing
power must be clamped with MOVs at their locations.