HGM-MZ to N2 Communications Adapter
Rev 1 (P/N 3015-5514)
5
HGM
Addr
A5
A6
A7
A8
Switch Positions
HGM
Addr
A5
A6
A7
A8
Switch Positions
0
Off
Off
Off
Off
8
On
Off Off Off
1
Off
Off
Off
On
9
On
Off Off
On
2
Off
Off
On
Off
10
On
Off
On
Off
3
Off
Off
On
On
11
On
Off
On
On
4
Off
On
Off
Off
12
On
On
Off Off
5
Off
On
Off
On
13
On
On
Off
On
6
Off
On
On
Off
14
On
On
On
Off
7
Off
On
On
On
15
On
On
On
On
Since the HGM is the only node on the adapter-to-HGM interface, address 1 is normally used. Be sure to set
the same address on the adapter and the HGM main board DIP switches.
5. Configuring the HGM-MZ with MZ-RD or Laptop PC
The only HGM parameters that are changeable through Metasys are the alarm thresholds. Configuring the
HGM for refrigerant type and length of tubing for each zone (zero length to disable a zone) must be done with
the MZ-RD remote display or a laptop PC. Refer to the appropriate Bacharach instructions for configuring
these items. HGM’s are commonly custom-configured at the factory per the customer’s needs, so field
configuring these parameters may not be necessary.
If configuring the HGM-MZ with an MZ-RD, the communications adapter’s presence will not affect the
standard configuration procedure. If configuring with a laptop PC, temporarily disconnect the HGM-MZs
RS-485 cable from the adapter until configuration is complete and the laptop is disconnected.
