Rinnai Demand Rapid DD1200E315N Instructions for use

Demand Rapid
rapid recovery storage system
Owner and installer guide
Models
• DD1200E315N/L DD1200i315N/L
• DD1212E315N/L DD1212i315N/L
• DD1250E315N/L
Installer
Please leave this guide with the owner as it contains important safety and
warranty information.

Important
This appliance must be installed in accordance with:
-Manufacturer’s installation instructions
-Current AS/NZS 3000, AS/NZS 3500, AS/NZS 5601.1 and G12/AS1
For use with Natural Gas or Universal LPG as indicated on the
appliance.
Not suitable as a spa or swimming pool heater
Appliance must be installed, commissioned and serviced by an
authorised person, being in New Zealand a licensed gastter.
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

About the Demand Rapid system.........................4
Important ..............................................................5
Maintenance and servicing...................................6
Troubleshooting....................................................7
Installation
Demand Rapid specication summary.................9
DD1200E315 specication ...................................10
DD1200i315 specication.....................................11
DD1212E315 specication ...................................12
DD1212i315 specication.....................................13
DD1250E315 specication ...................................14
Location................................................................15
General installation information............................16
Delivery temperatures ..........................................16
Connections..........................................................17
Filling and draining ...............................................18
Commissioning.....................................................19
Limited Warranty ..................................................20
Appendix 1
Condensate ..........................................................22
Contents

4 | Demand Rapid owner & installer guide 12949-B 02-19
About the Demand Rapid system
The thermostat senses the temperature of the water in the cylinder, and
when it drops below the set point the pump is activated. This ow starts the
Rinnai INFINITY continuous ow water heater, which returns the heated
water to the cylinder.
Reset timer
The system is equipped with a reset timer to ensure the pump does not run
continuously. This may occur if the Rinnai INFINITY does not ignite. The
timer will shut off the pump every 30 minutes for a few seconds to ensure
the Rinnai INFINITY resets itself.
Safety devices
For safe operation the cylinder component of the system is tted with:
• Temperature Pressure and Relief (TPR) valve(s), to ensure the water
stays at a safe pressure and temperature.
• Thermostat to maintain the water temperature.
It is important that you do not tamper with or remove these devices. In the
case of the TPR valve(s), do not block or seal the valve(s) or drain pipe(s).
The system must not be operated unless these devices are tted and are in
good working order.
Rinnai INFINITY safety devices; ame failure, boil-dry protection, overheat protection, fusible link,
pressure relief valve and combustion fan rpm check.
Cylinder thermostat setting
To meet the New Zealand Building code requirement1to disinfect water for legionella bacteria2, the
cylinder thermostat has been set to 65 °C.
1 Clause G12.3.9, Acceptable Solution G12/AS1 6.14.3
2 Legionella is a bacterium that can cause Legionnaires’ disease—a severe form of pneumonia
General safety
Power cords
Power leads from the system MUST BE plugged into a weatherproof electrical outlet. If
the power supply cord of the system is damaged it must be replaced by an authorised
person in order to avoid a hazard, using genuine replacement parts from Rinnai. Take
care not to touch power cords with wet hands.
Rinnai INFINITY external ue outlet
• Do not touch or insert objects into the ue outlet
• Keep ammable materials, spray cans, fuel containers, pool chemicals well clear of the system
and ue outlet

Demand Rapid owner & installer guide 12949-B 02-19 | 5
Important
Only a licensed tradesperson can install, adjust, maintain and service this water heating system.
Any work carried out by a non-licensed tradesperson is illegal and will void any warranty.
Catch pan
It is important a suitably drained catch pan (or drain system) is tted where damage could be
caused by discharge from the cylinder. This is a mandatory requirement of the installation. If
damage is caused by a leaking cylinder that has not been installed with a suitable drain system the
owner can seek compensation through the installer or consider claiming on insurance.
In the event of a power failure
The system will not operate without electricity. In the event of a power failure, when power is
restored the water ow may need to be stopped and restarted to get the system working again.
Frost protection
Frost protection1 is tted as standard on all Rinnai INFINITY models. Frost protection operates
automatically, as required, whenever the appliance is connected to the power supply.
If power has failed and there is risk of damage from frost, turn off the gas supply to the unit, and
open a tap slightly to allow ow through the unit. This may prevent damage from freezing. If the
system is not going to be used for an extended period and the power supply is disconnected,
turn off the water and gas supply and arrange for a plumber to drain all water from the system to
prevent frost damage.
Flue outlet discolouration
The colour of the ue outlet on an external Rinnai INFINITY may change over time due to
condensate in the exhaust gases. This is normal. The discolouration will not damage the unit, and
will not affect performance of the water heater.
Do not adjust the thermostat settings
The warranty is not valid unless the following settings remain:
• Rinnai INFINITY 75 °C
• Cylinder set temperature 65 °C
• Cylinder low limit temperature 60 °C
1Frost protection turns on when the temperature inside the unit drops below 3.5 °C and switches off when the temperature reaches
7 °C. The heat inside the unit is provided by ceramic heating elements that stop the water within the pipework of the unit from freezing.

6 | Demand Rapid owner & installer guide 12949-B 02-19
Maintenance and servicing
Hot water systems, like cars, require regular maintenance and servicing. To ensure longevity of
your system we recommend the following.
Period What needs to be done
Every six months TPR valve(s)—operate the easing gear
Annually Inspection and service of the entire hot water system, including
inspection of the ue system (if applicable), cleaning of the INFINITY
inlet water lter, draining and ushing of the cylinder if the water
supply contains excessive levels of silt
TPR valve(s)
Located near the top of the
cylinder—essential for safe
operation. The TPR valve(s)
automatically vent hot water if
the temperature or pressure of
the water in the cylinder gets
too high.
Every six months operate the
easing gear to remove lime
deposits and check that it is
not blocked. As the valve(s)
will discharge hot water,
ensure no one is near the
drain line.
Failure to operate the
relief valve easing gear
at least once every
six months may result
in the water heater
exploding.
Continuous leaking of water
from the valve(s) may indicate
a problem. It is important that
you raise and lower the easing
gear gently. During operation,
if the valve does not discharge
water when the easing gear
is lifted, or does not seal
again when closed, arrange
for an authorised person to
come and inspect the system
immediately.
During servicing of your
system the TPR valve
needs to be checked and/or
replaced. This needs to be
done by an authorised person
at intervals not exceeding
ve years, or more frequently
in areas where the water is
classied as hard.
A TPR valve must not be
replaced with one that has a
higher pressure rating than
that specied for the cylinder.
Maintenance and servicing
Rinnai has a maintenance,
service, and spare parts
network with personnel who
are fully trained and equipped
to give the best advice on
your Rinnai product. Regular
maintenance and servicing
is not covered by the Rinnai
warranty.
For help locating a service
person on your area call
0800 746 624.
Lift until water flows
from the drain line,
lower gently
To
water
heater
To drain line
How to operate the easing gearTPR position - top of cylinder
WARNING

Demand Rapid owner & installer guide 12949-B 02-19 | 7
Troubleshooting: Rinnai INFINITY error codes
troubleshooting with controllers or status monitor
Your Rinnai INFINITY has a self diagnostic capability. If a fault occurs, an error code will ash
on the status monitor (HD200 external and EF models) or on the digital controller (if tted). This
assists with diagnosing the fault and may enable you to overcome a problem without a service call.
Please quote the code displayed when contacting Rinnai.
In some cases you may be able to clear the error code by turning the lower water valve off, wait 20
seconds, then on again.
Error
code
Fault Possible solution
-Noticeable reduction in water ow Inlet water lter needs to be cleaned—service call.
03 Power interruption, water will not ow
when power is back on
Turn off all hot water taps and press On/Off (on the controller
twice)
10 Combustion fan current is too high. Unit
operates then stops.
Owner: Service call
Installer: Check blockage of air intake/ue outlet, and combustion
fan.
11 No ignition. Unit stops without ame
igniting.
Owner: Check gas is turned on at the water heater, gas meter, or
cylinder.
Installer: Check; gas supply, sparker unit, and gas valves.
12 Flame failure, earth leakage Owner: Check gas is turned on at the water heater, gas meter, or
cylinder. Check there are no obstructions to the ue outlet.
Installer: Check; gas supply, ame rod, earth wire lead, and water
control.
14 Thermal fuse and/or OH switch
activated. Unit operates then stops.
Owner: Service call
Installer: Check thermal fuse and OH switch. If either are faulty
check the heater for damage, conrm gas type, pressure settings,
and test point pressures.
16 Over temperature warning. Unit
operates then stops.
Owner: Service call
Installer: Conrm gas type, pressure settings, and test point
pressures. Check; gas valves, water ow sensor and servo, and
HEX outlet temperature thermistor.
25 Condensate trap error Check condensate drain for blockage
32 Outlet water temperature faulty Owner: Service call
Installer: Check hot water outlet thermistor
33 Heat exchanger outlet sensor faulty Owner: Service call
Installer: Check HEX thermistor
34 Air temperature sensor faulty (internal
models only)
Service call. Will require; checking sensor wiring for damage,
measuring sensor resistance, checking combustion fan, checking
internal ue leakage, checking ue system integrity, and possibly
replacing the sensor
52 Modulating solenoid valve fault. Unit
stops without ame ignition.
Owner: Service call
Installer: Check modulating solenoid valve
61 Combustion fan failure Owner: Service call. Installer: Check combustion fan.
65 Water ow control error. Water ow is
not controlled. Water temperature too
low.
Owner: Service call.
Installer: Check water ow servo.
71 Solenoid valve circuit error. Unit does
not operate.
Owner: Service call.
Installer: Check gas valves
72 Flame rod circuit error. Unit does not
operate.
Owner: Service call.
Installer: Check ame rod
LC Scale buildup in heat exchanger—when
checking maintenance code history, 00
is substituted for LC
Service call

8 | Demand Rapid owner & installer guide 12949-B 02-19
Troubleshooting
troubleshooting without controllers or status monitor
Fault Possible solution
Unit does not start Check power is on at the unit. Check gas isolation valve at the unit and gas
meter are fully open.
Unit starts and then shuts down
immediately
Check power is on at the unit. Check gas isolation valve at the unit and gas
meter are fully open.
Unit starts then water goes cold Check power is on. Open hot water tap fully.
Excessive temperature
uctuation while water is owing
Service call.
Excessive noise or vibration from
the water heater
Service call.
Faults caused by insufcient gas and/or water supply, gas quality, water quality, installation errors
or operation errors are not covered by the Rinnai warranty.
Troubleshooting
general system troubleshooting
What’s happening Possible cause Explanation and/or possible solution
Delivery temperature not
hot enough
No electrical or gas supplies to the heat
source
Check and turn on the power and gas
supplies
Insufcient gas Check gas supply, availability and pressure
Temperature sensor has dislodged or failed Check temperature sensor is correctly
positioned and providing information to the
thermostat
Excessive load on system Check maximum demand does not exceed
rated capacity
Inadequate heating circuit—pump not
working properly
Check all valves are fully open
Tempering or thermostatic mixing valve
malfunctioning
Service call
Delivery temperature too
hot
Tempering or thermostatic mixing valve
malfunctioning
Service call
Make-up water owing
continuously
Leak in cylinder and/or heating circuit Check for leaks

Demand Rapid owner & installer guide 12949-B 02-19 | 9
Installation
Installation, servicing and repair shall be carried out only by
authorised personnel.
Supplied with the system:
• Pump
• Controller
• UV pipe resistant insulation 15-18 mm
• TPR valve(s)
Demand Rapid specication summary
Description
A complete storage hot water system (top down heating) made up
of a Rinnai INFINITY commercial continuous ow gas water heater
(external or internal unit), a pump, a thermostat and controller, and a
315 L Demand Duo cylinder.
Suitability
For smaller commercial or larger residential applications where a
large quantity of hot water is required quickly, but there is recovery
time available before next use. For example lling a machine or spa
bath.
Hard or aggressive water will need to be treated in order to use this
system, if in doubt please test before use.
Not suitable as a pool or spa heater.
System conguration
Thermostat pump on 60 °C
Thermostat pump off 65 °C
INFINITY setting 75 °C
Max. outlet water temp. 75 °C
Input 195-249 MJ/h
Output 44.5-57.8 kW
Connections Gas
Cold water inlet
Hot water outlet
Hot water return
Condensate
TPR
Electricity
DN20 ¾ “ BSP male
DN32 1¼ “ BSP female
DN32 1¼ “ BSP female
DN32 1¼ “ BSP female (not used)
DN15 ½ “
DN20 ¾ “ BSP female
230 V AC GPO
Ingress protection IPX4
Weights Empty
Full
82-90 kg
402-410 kg

10 | Demand Rapid owner & installer guide 12949-B 02-19
DD1200E315 specication
Ø600
2083
1620
385
285
90°
22°
43°
861
Hot outlet
DN32
Cold inlet
DN32
Hot
return
DN32
1855
Gas consumption: 199 MJ/h
Output: 45.9 kW
Weights
Empty 82 kg
Full 402 kg
Water pressure
Min. 150 kPa
Max. 850 kPa
Hot water delivery
Raised 25 °C 1500 L/h
Raised 35 °C 1250 L/h
Raised 45 °C 950 L/h
Raised 50 °C 875 L/h
Raised 55 °C 800 L/h
TPR rating: 850 kPa, 99 °C, 46 kW (supplied)
ECV: 700 kPa (not supplied)
PLV: 500 kPa (not supplied)
INFINITY power consumption
Normal: 72 W, standby: 2 W, automatic frost protection: 116 W