Rain Master RME HAWK, User Manual

Page: 14 / 72

Independent Normally Closed Master Valve and Pump Operation
If you have a Master Valve which requires activation to open, and a pump which is sometimes
needed when irrigating, connect the Master Valve Solenoid to the MV and Valve Common
terminals and the pump starter to Station 1 as shown in Figure 5. If the pump starter DOES
NOT operate on 24 VAC OR the combination of the Master Valve Solenoid and pump starter
require more than 1 Amp, you will need an isolation relay (Rain Master part: RLY1 or equivalent)
as shown. During SETUP, select the NC (Normally Closed) Valve type for all programs which
require the Master Valve and select Pump Operation for all programs which require it.
If more than one clock is going to control the Master Valve or pump, the clocks must be
isolated from each other. Contact RMIS for the pamphlet on multiple clock installations.
12
FIGURE 5. INDEPENDENT NORMALLY CLOSED MASTER VALVE AND/OR PUMP
CONNECTION WITH ISOLATION RELAY
TO
TRANSFORMER
YELLOW
YELLOW
WHITE
BLACK
MASTER
VALVE
PUMP
24 VAC
COIL
1
2
3
4
TO
STATIONS
(2-6)
1 2 3 + –
RAIN FLOW
Normally Open Master Valve
If you have a Master Valve which is always open until energized, connect the solenoid to the
MV and Valve Common terminals as shown in Figure 2. During setup, select valve type NO
(Normally Open). The Master Valve will only be activated when the controller detects a Main
Line Break or Unscheduled Flow condition. In this case, a fault condition will exist until
manually cleared.
RLY1