Orion System One Condenser Head Pressure Module - Manual (Page 5)

Technical Guide
One Condenser Head Pressure Module
5
Power Supply
The One Condenser Head Pressure Module requires a 24 VAC power
connection with an appropriate VA rating.
If you will be connecting the One Condenser Head Pressure Module to
any of the VCM-X series or VCM-X E-BUS series controllers, one of
the most important checks to make before powering up the system for
the fi rst time is to make sure that the controller is confi gured properly
for your application. Refer to the VCM-X Controller Technical Guide or
VCM-X Modular E-BUS Technical Guide for more information.
WARNING: Observe polarity! All boards must be wired
GND-to-GND and 24 VAC-to-VAC. Failure to
observe polarity could result in damage to the
boards.
Important Wiring Considerations
Please read carefully and apply the following information when wiring
the One Condenser Head Pressure Module:
1. To operate the One Condenser Head Pressure Module, you
must connect power to the 24 VAC input terminal block.
2. Each Pressure Transducer must have its own 18-gauge
shielded twisted pair cable. The Drain Wire must be the “Gnd”
signal for the transducer.
3. When the 2-10 VDC Analog Output is being used to control
the Condenser Fan Speed or Water Valve Percentage, the cable
must be 18-gauge shielded wire, and the Drain Wire must be
the “Gnd” signal.
4. Check all wiring leads at the terminal block for tightness.
Be sure that wire strands do not stick out and touch adjacent
terminals. Confi rm that all transducers required for your
system are mounted in the appropriate location and wired into
the correct terminals.
WARNING: Be sure all controllers and modules are
powered down before connecting or
disconnecting HSSC cables.
Installation & Wiring