User manual

Retrofit Installation
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9.4.2 Power Connection for Himod
The harness supplied with the OpenComms NIC-485
(p/n 159084G1) is equipped with three connectors, one at either end of
the harness and one in the middle. The harness taps power from the
24 VAC input to the control board of the environmental unit. To con-
nect this power to the NIC-485:
1. Locate the connector containing the two red wires plugged into
P43 on the control board and unplug it. Reconnect it to the
connector in the middle of the supplied harness.
2. Plug one end of this harness into P43 on the control board and the
other end into TB3 of the OpenComms card.
9.4.3 Communication Connection for Himod
The second wiring harness provided (p/n 159083G1) has a connector
fitted at either end and is the communication connection between the
unit microprocessor and the NIC-485.
To put it in the system:
1. Remove the existing wire located on P25 of the environmental
controller, cut off the red connector and reconnect the wires to TB2
of the interface card. Ensure correct polarity.
2. Connect one end of the wire harness to TB1 of the interface card;
the other end connects to P25 of the environmental controller.
9.5 Mini-Mate2
An enclosure is recommended for use with ceiling-mounted environ-
mental units or where internal mounting of the NIC-485 is not feasi-
ble. Older-generation Deluxe and Challenger units may also require
external mounting.
9.6 Emerson Network Power (CEMS100 / LECS15)
The kit includes a special cable to allow simple interconnection
between the controller and the OpenComms NIC-485.
Questions about the retrofit kits should be directed to the Interna-
tional Sales department.
Contact: [e-mail]
9.7 UPS Installation
Retrofit kits are designed specifically for individual units. Consult
your local sales / service representative for pricing, part numbers and
installation help.