Rinnai Demand Duo Operating instructions

Demand Duo commercial controller (DDSTAT234)
Programming guide
Programming setup for the following Rinnai commercial systems:
• Demand Rapid with one INFINITY and a single pump
• Demand Duo (DD400-1000) with a single pump
• Demand Duo (DD400-1000) with two pumps
• Demand Duo (DD400-1000) in a circulating ring main system with two pumps

Rinnai is constantly improving its products, and as such, information and specications are subject
to change without notice. For the most up-to-date information, go to www.rinnai.co.nz
Installation
This controller must be installed in accordance with:
-Manufacturer’s instructions
-Current AS/NZS 3000 Wiring Rules
Installation, servicing and repair shall be carried out only by authorised personnel.
Warning
Improper installation, adjustment, alteration, service and maintenance can cause property damage,
personal injury or loss of life.
For more information about buying, using, and servicing of Rinnai appliances call: 0800 RINNAI
(0800 746 624).
Rinnai New Zealand Limited
105 Pavilion Drive, Mangere, Auckland
PO Box 53177, Auckland Airport, Auckland 2150
Phone: [phone]
Fax: [phone]
Email: [email protected]
Web: rinnai.co.nz
youtube.com/rinnainz
facebook.com/rinnainz
Important

Rinnai DDSTAT controller programming guide: 12697-C 03-20 | 3
Quick start programming
The DDSTAT will need to be programmed for the specic application. To do this requires accessing
di󰀨erent controller modes. In all applications you will be doing the following:
1. User menu To view and set the system temperatures, further detail on p.5
2. Factory mode To view and set up the system, further detail on p.6
3. Service mode To view and set up how the pump operates, further detail on p.10
Bold = standard settings
DEMAND RAPID, DEMAND DUO SINGLE PUMP AND DEMAND DUO DUAL PUMP
Controller
mode
Access code Programming sequence Additional
comments
1. User
menu
N/A Set > tank set temp > 65 > accept > tank low temp > 60 >
accept
INFINITY is set
to 75 °C
2. Factory
mode
Hold 2 down then
5 > 4 > 5 > 5
Important
If you select
‘Change’ you
must reset ALL
parameters.
Demand Rapid
Model > DDSTAT > DD1 > Measure return temp1> No >
Continue to advanced setup > BMS relay > Normally open
Demand Duo single pump
Model > DDSTAT > DD2+1P > Measure return temp1> No >
Continue to advanced setup > BMS relay > Normally open
Demand Duo dual pump
Model > DDSTAT > DD2+2P > Measure return temp1> No
> Alternate pump operation > Yes> Swap pumps every >
12 hours > Continue to advanced setup > BMS relay >
Normally open
Left power point
= INFINITY
Right power
point = pump
Left power point
= pump 1
Right power
point =pump 2
3. Service
mode
Hold 5 down then
1 > 3 > 1 > 1
All systems
Continue > Change mode > Interrupt mode > Interrupt after >
28 mins > Interrupt for > 30 secs > Exit
1 Additional temperature sensor available as a separate part (code R5409), to measure temperature supplied from
water heater(s).
BUILDING FLOW AND RETURN (RING MAIN) → further information on p.9
1. User
menu
N/A Set > Ring main temp > 60 > accept
2. Factory
mode
Hold 2 down then
5 > 4 > 5 > 5
Model > DDPCDEL > Ring main low limit > 5> Alternate pump
operation > Yes > Swap pump every > 12 hours > Continue
to advanced setup > BMS relay > Normally open
3. Service
mode
Hold 5 down then
1 > 3 > 1 > 1
Continue > Pump operation > Boost > Change mode >
Continuous mode > Exit
ALL SYSTEMS: CLEAR ERROR CODES / ALARMS → further information on p.10
3. Service
mode
Hold 5 down then
1 > 3 > 1 > 1
Continue > Reset pump run hours > No > View error logs > Yes
> Clear

4 | Rinnai DDSTAT controller programming guide: 12697-C 03-20
DDSTAT controller - general
TANK TEMPERATURE 62
SET INFO MAINT
PUMP AUTO
1 2 3
4
5Controller 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 temperature1’ and the ‘tank low limit temperature2’ 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 congured 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 congurations
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, re, serious injury, or product failure.
Controller buttons
Illustrated with numbers for instruction purposes.

Rinnai DDSTAT controller programming guide: 12697-C 03-20 | 5
Basic operation - setting tank temperatures
Once the controller has power, the tank temperature (home) screen is displayed. If the temperature
probe is in place a reading will be displayed. If you need to change the default tank temperatures
follow the below steps.
TANK SET
65
ACCEPT
TEMPERATURE
1 2 3
4
5
1
2
3
Press SET
Press SET to allow the tank settings to be
changed.
Change the tank set temperature
Default is 65 °C, to change use buttons 4
and 5, and press ACCEPT (button 2).
TANK LOW LIMIT
60
ACCEPT
TEMPERATURE
1 2 3
4
5
Change the low limit temperature
Default is 60 °C, 5 °C less than the tank
set temperature. To change use buttons 4
and 5, and press ACCEPT (button 2).
TANK TEMPERATURE 62
SET INFO MAINT
PUMP AUTO
1 2 3
4
5

6 | Rinnai DDSTAT controller programming guide: 12697-C 03-20
Programming - accessing factory mode
DDSTAT with one or two pumps (p.7-8)
Used with Demand Duo systems and operates by measuring the temperature of the water in
the tank. If the water temperature falls below the tank set temperature and the tank low limit
temperature, the controller will switch on the pump(s) to circulate water through the system.
DDPCEL (p.9)
Used to monitor commercial ow and return systems. The main functionality of this mode is to
extend the life of the pumps by regular alternation, or overcome any issues with a faulty pump if
present.
DDSOLAR (N/A to NZ)
Factory mode needs to be accessed to change the system conguration. To do this make sure the
controller is switched on and the system display is showing.
CURRENT MODEL IS
EXIT CHANGE
DD2+1P, V1.2
1 2 3
4
5
1 PUMP, IT, CM, ID1
1
2
3
Access factory mode
Hold down button 2 and press the
following buttons in quick sequence:
Hold 2: 5 > 4> 5> 5
If done correctly the next screen (below)
will show the current model settings.
Change the factory setting
To change the setting from what is
showing on the screen, press button 3 to
‘Change’.
1T = 1 temp. sensor
CM = pump in continuous mode
ID1 = controller ID 1
SELECT MODEL
EXIT ACCEPT
DDSTAT
1 2 3
4
5
Access the operating mode
This screen will give the option of cycling
through the three operating modes
(DDSTAT, DDPCEL, DDSOLAR), by using
the up and down arrows.
Select the system operating mode
required by pressing button 2 ‘ACCEPT’
and configure based on the relevant
system detailed in this guide.
TANK TEMPERATURE 62
SET INFO MAINT
PUMP AUTO
1 2 3
4
5

Rinnai DDSTAT controller programming guide: 12697-C 03-20 | 7
Programming - DD400-1000 single pump
1
2
Select DD2 + 1P
You can cycle through the system congurations
using button 5 (the up arrow). This will present:
• DD1
• DD2 + 1P (one pump)
• DD2 + 2P (two pumps)
Select DD2 + 1P and press button 2 to ‘ACCEPT’.
SELECT VERSION
EXIT ACCEPT
DD1
1 2 3
4
5
SELECT VERSION
EXIT ACCEPT
DD2+1P
1 2 3
4
5
MEASURE RETURN
EXIT ACCEPT
TEMPERATURE?
1 2 3
4
5
NO
Measure return temperature
The default setting is ‘NO’. ‘Yes’ is only selected if
an extra sensor has been purchased (accessory
R5409) and installed for fault diagnosis.
Use buttons 5 and 4 (up and down arrows) to
switch between ‘NO’ and ‘YES’, and press button
2 to ‘ACCEPT’.
CONTINUE TO
NO YES
ADVANCED SETUP?
1 2 3
4
5
To set the Demand Duo system for a single pump ensure you have selected the DDSTAT mode by
following the instructions on the previous page.
3Bypass advanced setup
The default settings for advanced setup are:
• BMS connection --> open
• Controller ID* --> 1
In the majority of installations just select ‘No’ to
bypass. For more information refer to p.11.
* Controller ID refers to the controller number, you can have
up to 16.
4Access the Rinnai service menu
To reduce the chance of the system shutting down
due to failed ignition of the Rinnai INFINITY units
the pump needs to be set to interrupt. Selection
is between 25-31 minutes, for the frequency, and
a range of 15-45 seconds, for the length of time.
Rinnai recommend 28 mins/ 30 secs, refer p.10
for setting instructions.
RINNAI SERVICE MENU
CONTINUE
1 2 3
4
5
EXIT
5Blank the unused GPO
Use the blanking plate in the controller kit, plug
the unused LHS electrical connection—the RHS
is activated for pump control.
Blanking plate

8 | Rinnai DDSTAT controller programming guide: 12697-C 03-20
Programming - DD400-1000 dual pump
1
2
Select DD2 + 2P
You can cycle through the system congurations
using button 5 (the up arrow). This will present:
• DD1
• DD2 + 1P (one pump)
• DD2 + 2P (two pumps)
Select DD2 + 2P and press button 2 to ‘ACCEPT’.
SELECT VERSION
EXIT ACCEPT
DD1
1 2 3
4
5
SELECT VERSION
EXIT ACCEPT
DD2+2P
1 2 3
4
5
MEASURE RETURN
EXIT ACCEPT
TEMPERATURE?
1 2 3
4
5
NO
ALTERNATE PUMP
EXIT ACCEPT
OPERATION
1 2 3
4
5
YES
Pump setup
The pump setup screens allow you to add an
extra pump into the system conguration and also
set the time for when the pumps swap over, 12 or
24 hours.
3
SWAP PUMPS EVERY
ACCEPT
12 HOURS
1 2 3
4
5
4Bypass advanced setup
The default settings for advanced setup are:
• BMS connection --> open
• Controller ID* --> 1
In the majority of installations just select ‘No’ to
bypass. For more information refer to p.10.
* Controller ID refers to the controller number, you can have
up to 16.
CONTINUE TO
NO YES
ADVANCED SETUP?
1 2 3
4
5
To set the Demand Duo system for two pumps ensure you have selected the DDSTAT mode by
following the instructions on p.6.
Measure return temperature
The default setting is ‘NO’. ‘Yes’ is only selected if
an extra sensor has been purchased (accessory
R5409) and installed for fault diagnosis.
Use buttons 5 and 4 (up and down arrows) to
switch between ‘NO’ and ‘YES’, and press button
2 to ‘ACCEPT’.
5
RINNAI SERVICE MENU
CONTINUE
1 2 3
4
5
EXIT
Access the Rinnai service menu
To reduce the chance of the system shutting down
due to failed ignition of the Rinnai INFINITY units
the pump needs to be set to interrupt. Selection
is between 25-31 minutes, for the frequency, and
a range of 15-45 seconds, for the length of time.
Rinnai recommend 28 mins/ 30 secs, refer p.10
for setting instructions.

Rinnai DDSTAT controller programming guide: 12697-C 03-20 | 9
Programming - circulating ring main
1
2
3
Select DDPCDEL
Use buttons 4 and 5 to select the system, in this instance
‘DDPCDEL’, press button 2 to ‘ACCEPT’.
SELECT VERSION
EXIT ACCEPT
DDPCDEL
1 2 3
4
5
RING MAIN
ACCEPT
LOW LIMIT
1 2 3
4
5
5
Determine system temperature uctuation
This screen lets you select the allowable temperature
uctuation below the set point. The options are 5 or
10 °C, to allow for losses within the building’s ow and
return system.
ALTERNATE PUMP
EXIT ACCEPT
OPERATION
1 2 3
4
5
YES
Pump setup
The pump setup screens allow you to add an extra pump
into the system conguration and also set the time for
when the pumps swap over, 12 or 24 hours.
4
SWAP PUMPS EVERY
ACCEPT
12 HOURS
1 2 3
4
5
CONTINUE TO
NO YES
ADVANCED SETUP?
1 2 3
4
5
To set the Demand Duo as a circulating system ensure you have selected the DDPCDEL mode by
following the instructions on p.6 (hold button 2 then press 5 >4>5>5 in quick succession).
Demand Duo with a ring main
The system in this conguration* should
have the Demand Duo controller set to the
interrupt settings shown on the next page,
and the ring main pump controller, often
purchased as an additional accessory,
should be left in continuous mode.
If the Demand Duo controller has not been
set, do the below steps.
Bypass advanced setup
The default settings for advanced setup are:
• BMS connection --> open
• Controller ID* --> 1
In the majority of installations just select ‘No’ to bypass.
For more information refer to p.10.
* Controller ID refers to the controller number, you can have up to 16.
RINNAI SERVICE MENU
CONTINUE
1 2 3
4
5
EXIT
5
* Typical Demand Duo ring main setup
Tank set temp. 65 °C, tank low limit temp. 65 °C, and the
ring main pump controller set to 5 °C.
Access the Rinnai service menu
To reduce the chance of the system shutting down due to
failed ignition of the Rinnai INFINITY units the tank pump
needs to be set to interrupt. Selection is between 4-10
minutes, for the frequency, and a range of 15-45 seconds,
for the length of time. Rinnai recommend 10 mins/ 30
secs, refer next page for setting instructions.

10 | Rinnai DDSTAT controller programming guide: 12697-C 03-20
Programming - Rinnai service menu
This mode is accessed if setting up the system and controller for applications that may experience
high winds, where the Rinnai INFINITY commercial units could lock out on occasion due to the
wind stopping ignition or an interruption to the gas supply. Setting up the system to automatically
restart/reset could avoid costly service callouts.
1
2
3
Access Rinnai service menu
Hold down button 5 and press the following buttons in quick sequence:
Hold 5: 1> 3> 1> 1 > Press button 3 to ‘CONTINUE’
Pump operation
This allows the option of alternating or boost. Select and press button 2 ‘OK’. Alternating is
the preferred option, but boost will energise both pumps simultaneously, for ringmains that
are poorly designed and experience considerable heat loss.
Changing mode
Interrupt mode breaks the power supply to the pumps for a short period of time, and
allows for the Rinnai INFINITY commercial units to be stopped. Select interrupt and press
button 2 ‘OK’.
There are a series of options within this feature that allow you to select when the interrupt
mode activates, and the length of time the power remains o󰀨. Select ‘INTERRUPT AFTER’
and enter 28 minutes for DDSTAT, and 10 minutes (DDPCDEL), and ‘INTERRUPT FOR’
30 seconds (range 15-45 seconds).
Reset pump and error settings
Once interrupt mode has been programmed there are three more screens; reset pump
run hours, view and clear error logs, and the option to clear all the errors and settings by
resetting the micro.
4
RINNAI SERVICE MENU
CONTINUE
1 2 3
4
5
EXIT
PUMP OPERATION
OK
ALTERNATING
1 2 3
4
5
EXIT
CHANGING MODE?
OK
INTERRUPT
1 2 3
4
5
EXIT
INTERRUPT AFTER
OK
10
1 2 3
4
5
MINUTES
INTERRUPT FOR
OK
30
1 2 3
4
5
SECONDS
VIEW ERROR LOGS?
NO
1 2 3
4
5
EXIT YES
VIEW ERROR LOGS?
NO
1 2 3
4
5
EXIT YES
VIEW ERROR LOGS?
NO
1 2 3
4
5
EXIT YES
RESET MICRO?
1 2 3
4
5
YESEXIT
1 2 3
3 3 4
4 4 4

Rinnai DDSTAT controller programming guide: 12697-C 03-20 | 11
Advanced setup screens
Advanced setup
Choose if advanced settings are required. This allows you
to select an open or closed option for a BMS connection
relay, and select the number of controllers (1-16).
• BMS connection
Default is open.
• Controller ID
Default is 1.
Once the relevant controller ID is accepted the display will
revert back to the default screen.
BMS CONNECTION
ACCEPT
RELAY NORMALLY
1 2 3
4
5
OPEN
CONTROLLER ID
ACCEPT
1
1 2 3
4
5
BMS connection on PCB
F1
Fuse 20x5 1A ONLY
PS1
L
N
24V
OV
ZP0552400W
BMS
User Panel CN1
BMS Connection
CN2
USER PANEL Connection
CN3
RLY2 RLY3
OC2
OC1
ACTIVE
NEUTRAL
MAINS
OC3 OC4 OC5 OC6
ACTIVE ACTIVE
NEUTRALNEUTRAL
PUMP 1 PUMP 2
Serial
label
Barcode
label
Rinnai power board
CN7
CN6
TEMP 2
TEMP 1
TEMP 2
DDTSTAT - Return temp.
DDPCDEL - Inlet temp.
DDSOLAR - Hot (panel) temp.
TEMP 1
DDTSTAT - Tank temp.
DDPCDEL - Outlet temp.
DDSOLAR - Cold (tank) temp.

DDSTAT controller programming guide: 12697-C
Tel: [phone]
http://www.youtube.com/rinnainz
http://facebook.com.rinnainz
Rinnai.co.nz
Rinnai New Zealand Limited
105 Pavilion Drive
Mangere, Auckland 2022
PO. Box 53177
Auckland Airport
Auckland 2150