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| Rinnai DDSTAT controller programming guide: 12697-C 03-20
DDSTAT controller - general
TANK TEMPERATURE 62
SET
INFO
MAINT
PUMP AUTO
1
2
3
4
5
Controller display
Default configuration is DD2 + 1 P, tank set at 65 °C, tank low
temperature at 60 °C.
About
The DDSTAT controller is used in conjunction with Demand Rapid / Duo systems and operates by
measuring the temperature of the water in the tank. If the temperature of the water falls below the
‘tank set temperature
1
’ and the ‘tank low limit temperature
2
’ the controller will switch on the pump(s)
and circulate water from the tank through the Rinnai INFINITY water heater and back to the tank.
The DDSTAT is configured with:
• a power feed to the controller
•
a tank temperature probe
• two integrated pump GPO’s
1
Tank set temperature range is 60 °C to 82 °C (factory default is 65 °C).
2
Tank low limit temperature range is 3 °C less than the tank set temperature down to 50 °C
(factory default is 5 °C)
Available configurations
System description
Model name
LH GPO
RH GPO
Demand Rapid with one INF and one pump
DD1
Permanently active for INF
Pump
DD 400-1000 with a single pump
DD2 + 1P
Disabled
Pump
DD 400-1000 with a two pumps
DD2 + 2P
Pump 1
Pump 2
DD 400-1000 circulating ring main (two pumps)
DDCPDEL
-
-
Controller positioning
When installing and locating the controller, please ensure that the position is dry and free from
constant exposure to water.
DO NOT use power boards with this controller.
Electrical
DO NOT modify the electrical wiring of this controller. If the wiring is damaged or has deteriorated
then it must be replaced by an authorised tradesperson. Failure to do so may result in electric
shock, fire, serious injury, or product failure.
Controller buttons
Illustrated with numbers for instruction purposes.