Noritz NCC1991-OD Installation Manual Download Page 23

23

Connecting the Quick Connect Cord to the two
units.

1. Turn off the power.
2. Remove the front cover of the heater (4 screws).
3. Pass the Quick Connect Cord through the wiring  

throughway and into the unit.

4. Plug the connector on the Quick Connect Cord to 

the receptacle inside the unit.

5. Attach the ground wire of the Quick Connect Cord 

to the terminal block fi xing plate.

  (If the ground wire is not attached, electrical nois 

may cause problems).

6. Secure the Quick Connect Cord with a clamp.
7. Replace the front cover.

Wiring Throughway

Coupling Cord

Clamp

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-2

"Quick Connect Cord-2" tag

A

B

1.Red
2.Black
3.White
4.Green
5.Blue
6.Blue

1.Red
2.Black
3.White
4.Green
5.Blue
6.Blue

1.Red
2.Black
3.White
4.Green
5.Blue
6.Blue

1.White
2.Green
3.Red
4.Black
5.Blue
6.Blue

The wire coloring on the Quick Connect Cord-2 will
not be the same as the wire coloring of the
connection plug inside the unit.
*  The remote controller can be connected to 

either unit A or B. Do not connect a remote 
controller to both units.

* Disconnect the remote controller from either 

unit A or B prior to installing the Quick Connect 
Cord.

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...

Reviews: