User manual

9
Chapter 2: Installing your SEC-HD
Chapter 2 explains how to mount, install, and connect equipment to your SEC-HD. Topics in
chapter 2 include:
 What you need to know before installing your SEC-HD below
 Connecting equipment to your SEC-HD on page 13
 Finishing the installation on page 18
What you need to know before installing your SEC-HD
Before installing your SEC-HD, you need to do some initial preparation:
1. Read Understanding power surges and surge suppression below.
 If you do not install external surge suppression devices, you risk damage to
the electronics inside your SEC-HD, which may cause your SEC-HD to fail.
 Because it is not possible to completely protect this product internally from
the effects of power surges and other transients, we highly recommend
that you install external surge suppression devices. For specific
recommendations, see your electrical contractor.
 If you do not take these precautions, you acknowledge your willingness to
accept the risk of loss or injury.
2. Using Appendix D: Installation worksheet on page 55, list all the equipment you want to control
using this SEC-HD. Install the equipment and make your electrical connections according to the
sheet.
3. Using Appendix E: Configuration worksheets on page 56, decide which relays and variable
stages you want to use for each piece of equipment, and how you want the equipment
configured. You can connect more than one piece of equipment to a single relay or stage as long
as the total current draw does not exceed the relay or stage’s limit. For more information, read
Electrical ratings on page 11.
Understanding power surges and surge suppression
Power surges can be caused by external influences (for example, lightning or utility distribution
problems) or they can be caused internally (for example, starting and stopping inductive loads such
as motors).