G.3.2 Installation - Honeywell CM4 Technical Handbook

CM4 Four-Point Continuous Monitor
the boards after the LonWorks board is added, and requires the new,
larger insulator provided.
Qty Description
1 Insulator for Serial PCB
2 Nut, 4-40 w/plastic lock
2 Flat washer
Bag 6: Bracket to Mount Connectors
Some Model CM4 and CM4-P units have a bracket similar to the one
in this kit, except it has an additional flange opposite the connectors.
This bracket needs to be replaced in LonWorks field upgrades to
tabletop or wall mount units, because it poses a risk of wire abrasion.
The new bracket has the flange removed to eliminate the abrasion
risk. If your unit has the bracket with the flange, replace it during the
upgrade installation.
Qty Description
1 Bracket for Cable Mounting
Bag 7: Universal Mounting Bracket for Rack Mount Units
Qty Description
1 Bracket for LonWorks
2 Screws, flat 6-32
2 Lockwasher
This bag contains a universal mounting bracket for all rack mount
installations. The bracket is used to install the LonWorks PCB on any
rack mount Model CM4. New mounting hardware is included. Discard
the old bracket and hardware when you upgrade the Model CM4 to
a LonWorks unit.
CM4 Technical Manual
Application
For LonWorks PCB in rack mount
Secures insulator to bracket
Washer underneath nut
Application
Back flange is removed; uses existing
hardware
Application
Modified for LonWorks PCB
Secures bracket
Locking washers for screws

G.3.2 Installation

CAUTION:
To prevent damage to equipment, wear a static prevention wrist strap
during the installation procedure.
Follow these steps to upgrade Model CM4 to a LonWorks unit:
• Remove the customer I/O panel.
• Remove the relay PCB from the customer I/O panel.
• Use the new I/O panel (Bag 1). Punch out the right side interface
access hole knockout on the I/O panel.
• Install the self-adhesive label as shown in Figure G-3.
NOTE:
The label is installed on the rear panel for table and wall mount
units.
Remove the backing from one side of the foam insulator (Bag 1) and
attach it to the LonWorks interface (Bag 1) as shown in Figure 1.
Figure G-3. Installing Foam Insulator on LonWorks Interface Board
• Install the LonWorks interface PCB and secure using two
screws.
The insulator (white) from Bag 1 must be placed under the
LonWorks interface. Fold the leading tab downward before
G-5
Foam Insulator