A. CODED OPERATION
All ZDM-D modules are normally configured in the “latching” mode of operation. If coded operation (from
coded initiating devices) is desired, cut the latch resistor: R23 for Zone A and R24 for Zone B.
B. WATERFLOW DETECTION
When using the ZDM-D module for waterflow alarm detection, the maintenance switch of the
appropriate zone must be bypassed (per U.L. 864). For Zone A, install mini-jumper W3, for Zone B, install
jumper W4. The notification appliances can only be silenced after the waterflow device has been restored to nor-
mal.
C. GENERAL ALARM — ZONE JUMPER CONFIGURATION
The zone jumper matrix and zone supervision jumpers should be configured per the instructions in Section
16.1C.
D. WIRING
Field wiring is configured (Fig. 16) as:
Zone A — Class A or B, Style D or B
Zone B — Class B, Style B
Using Figure 17 as a guide, connect the field wiring to Terminals 36 through 40.
16.4 Sprinkler Supervisory Service
The ZDM module may be used for sprinkler supervisory service by observing the following procedure:
A. Remove jumper J3A (or J3B, depending on the zone to be used) if there is to be no municipal notification
for supervisory purposes.
B. Insert jumper J4A (or J4B depending on the zone to be used).
C. Connect a notification appliance (such as the HEM mini-horn) to Terminals 3 and 5 on the BMFC-6.
D. Label the ZDM to indicate it is used for supervisory signaling.
Thus, off-normal positioning of any supervisory switch will cause the notification appliance to activate, but will
not cause a alarm condition unless desired.
Figure 17
NOTE: The maximum allowable resistance in the field wiring is 100 ohms per zone, Class B, Style B,
50 ohms per zone, Class A, Style D.
Page 18 of 28 9000-0007
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