Noritz NCC1991-OD Installation Manual Download Page 37

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2. Remove the decorative frame from the remote 

controller. (The remote controller is inserted 
in the decorative frame.)

Remove the remote 
controller while pulling 
the decorative frame 
forward.

Decorative frame

Main remote 
controller body

3. Connect the remote controller wires to the 

cord supplied with the water heater.

* Do not remove the remote controller wires 

from the terminal block, conect these wires to 
the remote controller cord.

* Do not remove the insulating cover (clear).

Remote controller
wires

* Check the terminal is covered with Section A 
   (      ) of the insulating cover (clear, see Fig. 1).

* If the Y-shaped terminal is not covered, the 

exposed section may come into contact with 
the mounting bracket resulting in improper 
operation or failure.

Rear side of the remote controller

Fig. 1

Winding around the notches

Pass the remote
controller wires
through the notch.

Section A

Insulating cover
(Do not remove 
the cover.)

Mounting bracket

Remote controller wire

4.  Secure the remote controller wires by winding 

them around the notches as shown in Fig. 1.

      • See Fig. 1 for wiring inside the wall.

5.  Attach the remote controller to the mounting
 

bracket. Insert the bottom of the remote 
contoller into the groove at the bottom of the 
bracket and push in the 2 hooks on top of the 
remote controller completely.

* If it is diffi cult to attach, do not try to force it 

as it may result in broken hooks. Check for 
proper alignment in the groove or for loose 
wires obstructing the remote controller.

* Do not install on the 

bracket by force, the 
hooks may break.

Hooks

Groove

Mounting
bracket

Main remote 
controller body

Remote controller
cord

6.  Secure the remote using the machine screws.

7.  Attach the decorative frame which was 

removed in the second step.

 

Push the 4 corners of the decorative frame 
until there is a click.

* Incomplete 

installation may 
result in failures 
such as switch 
operation failure.

Note: To remove the decorative frame after 

installation of the remote controller and 
the frame, pull the entire decorative 
frame forward while pressing the sections 
indicated (where the fingers are) in the 
fi gure below.

* If it does not come off, insert a fl at head 

driver into the notch at the bottom of the 
decorative frame and slightly twist it to 
remove (due caution is required not to 
scratch the remote controller, decorative 
frame or the wall in doing so).

Click

Click

Click

Click

Put fi ngers into this gap.

Main remote 
controller body

Machine screw
(accessory part)

Summary of Contents for NCC1991-OD

Page 1: ...covered by the warranty Check that the installation was done properly in accordance with this Installation Manual upon completion After completing installation please either place this Installation M...

Page 2: ...ary for installation Quick Connect Cord QC 2 Q ty Shape Part Part Shape Q ty 1 1 Remote Controller Cord 26ft 8m 1 each Isolation Valves includes pressure relief valve Pipe Cover PC 3S SUS 1 1 Owner s...

Page 3: ...ater temperature will become unstable as the pipe length increases Quick Connect cord Union Gas Valve Union Shutoff Valve Shutoff Valve Hot Water Cold Water Leave enough clearance around the plumbing...

Page 4: ...ater supply as unexpected accidents may occur as a result Check Water Supply Quality If the water supply is in excess of 12 grains per gallon 200 mg L of hardness acidic or otherwise impure treat the...

Page 5: ...Also consider the surrounding trees and animals The heat and moisture from the water heater may cause discoloration of walls and resinous materials or corrosion of aluminum materials Do not locate the...

Page 6: ...re in front of the unit Set the bottom edge of the exhaust port about 84 2 130mm from the corridor floor Handrail common side corridor balcony etc Handrail about 84 2 130mm Maintain the following clea...

Page 7: ...J Nonmechanical air supply inlet or combustion air inlet to any other appliance K Mechanical air supply inlet L Above paved sidewalk or paved driveway located on public property Under veranda porch d...

Page 8: ...tallations in the USA 1 below 1 horizontally from or 1 above any door operable window or gravity air inlet into any building 3 above any forced air inlet within 10 Maintain the following clearances to...

Page 9: ...parts may be damaged and may become highly dangerous Install the unit on a vertical wall and ensure that it is level Locating Screw Holes Mounting Structure When installing with bare hands take cautio...

Page 10: ...1 Natural Gas Meter See next page for the pipe capacity charts Noritz Condensing Tankless Gas Water Heater 199 900 Btuh Clothes Dryer 35 000 Btuh Barbecue 50 000 Btuh Gas Range Stove 65 000 Btuh 10 3...

Page 11: ...496 55 112 213 440 675 1260 Maximum Capacity of Flex TracPipe in Cubic Feet per Hour of Natural Gas 0 60 Specific Gravity 0 5 WC Pressure Drop Length in Feet Pipe Size 3 4 1 1 1 4 1 1 2 2 206 383 614...

Page 12: ...ter may not be connected to any heating system or components previously used with a nonpotable water heating appliance When water is required in one part of the system at a higher temperature than in...

Page 13: ...e Use shower heads with low pressure loss If necessary use a pump or other means to ensure that the supply water pressure to the inlet of the heater does not fall below 29 PSI when the maximum amount...

Page 14: ...reatment Required Treatment Required Treatment Required Install Noritz Isolation Valves to allow for flushing Flushing is required if a water treatment device is not installed Suggested Suggested Inst...

Page 15: ...as short as possible Long runs or applications where the nearest drain is above the water heater will require the use of a condensate pump Size the pump to allow for a maximum condensate discharge of...

Page 16: ...PVC pipe DO NOT ADD ANY VALVES DO NOT ADD ANY VALVES NORITZ Condensing Tankless Gas Water Heater NORITZ Condensing Tankless Gas Water Heater Note If the drain line becomes clogged or frozen condensate...

Page 17: ...water heater is not controlling the pump Set the Aquastat to 10 F 5 C below the set output temperature 4 Noritz recommends the use of an Isolation Kit with the installation These kits include an integ...

Page 18: ...ly required by the water heater is 120VAC at 60 Hz The power consumption may be up to 303W or higher if using optional accessories Use an appropriate circuit Do not disconnect the power supply when no...

Page 19: ...p switches as described below The default temperature is 120 F 50 C 1 Disconnect electrical power to the water heater 2 Remove the front cover of the water heater 4 screws 3 Disconnect the remote cont...

Page 20: ...ode and cause problems Be sure to hand tighten when screwing to the terminal block Power tools may cause damage to the terminal block 1 Check to make sure that the remote controller cord has plenty of...

Page 21: ...e controller 2 Disconnect then reconnect electrical power to the water heater 3 Press the MENU Button inside the cover select Initial settings using the Buttons 4 Press the ENTER button the Initial se...

Page 22: ...m a wall circuit to the pump 5 Replace the front cover Pump Wiring This feature is not available when using the Quick Connect Multi System feature Relay connection with larger pumps 85 W 1 Locate and...

Page 23: ...mp Ground wire Connector Use one of the vacant holes Connector Connecting Quick Connect Cord 2 Caution For Quick Connect Multi System Installation use part QC 2 only sold separately Quick Connect Cord...

Page 24: ...r a proper blue color and consistency If the flame does not appear normal the burner may need to be cleaned If the burner needs to be cleaned it must be performed by a qualified service technician Do...

Page 25: ...ower to the unit 8 The unit will now operate whenever hot water is called for If the unit will not operate follow the shutdown instructions and call a service technician Shutdown Instructions 1 Stop a...

Page 26: ...2 WIRING THOROUGHWAYS 2 2 56mm 2 2 55mm 1 7 44mm 0 8 20mm NCC1991 OD GAS INLET COLD WATER INLET HOT WATER OUTLET CONDENSATE DRAIN FROM BOTTOM OF CASE HEIGHT OF EACH FITTING 4 0 5 13mm 6 0 24 x 0 4 6 x...

Page 27: ...tes of connecting electrical power before turning on the Power On Off Button press the or button on the remote controller and hold until the display blinks 99 If 99 does not blink on the remote contro...

Page 28: ...system will make hot water more quickly available to remote fixtures The pump will circulate water through the loop until the entire loop is warm and then the system controller will turn off the pump...

Page 29: ...tat Pump Control Wires use external relayV Unit 1 Set Yes for the question Start pump rotation in system settings See SC 301 6M Installation Manual When installing 2 pumps in parallel Set Yes for the...

Page 30: ...02 PCB Power PCB B5 B5 System Controller No 5 No 4 No 3 No 2 Remote Control terminal block Remote control terminal block Remote Controller Cord PCB Power PCB PCB Power PCB Multi System Wiring Use SC 3...

Page 31: ...to both the cold water supply piping and the hot water supply piping to prevent freezing during cold weather and to prevent heat loss through the piping Unit 1 Unit 2 Unit 3 Unit 10 Unit 11 Unit 12 S...

Page 32: ...roller This system will make hot water more quickly available to remote fixtures The pump will circulate water through the loop until the entire loop is warm and then the system controller will turn o...

Page 33: ...e Hot water storage tank copper or stainless steel pipe Return line circulation pump Size for max flow Size for max flow Storage tank supply line copper or stainless steel pipe Storage tank return lin...

Page 34: ...nit 2 Unit 3 CAUTION The below diagram shows the connection of 3 units to the system controller When connecting 4 or more units follow the same procedure Connect the water heaters to the system contro...

Page 35: ...rovided with the water heater In order to use this product safely read this installation manual carefully and follow the installation instructions Potential dangers from accidents during installation...

Page 36: ...t The value in indicates the quantity Remote Controller Mounting bracket Raised countersunk head wood screw Wall anchor Raised countersunk head screw For junction box installation Machine screw When a...

Page 37: ...mounting bracket Insert the bottom of the remote contoller into the groove at the bottom of the bracket and push in the 2 hooks on top of the remote controller completely If it is difficult to attach...

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