Noritz CK-11 User manual

1
This conversion kit shall be installed by a qualified service agency in
accordance with the manufacturer’s instructions and all applicable codes
and requirements of the authority having jurisdiction. The information in
these instructions must be followed to minimize the risk of fire or
explosion or to prevent property damage, personal injury or death. The
qualified service agency is responsible for the proper installation of this
kit. The installation is not proper and complete until the operation of the
converted appliance is checked as specified in the manufacturer’s
instructions supplied with the kit.
In Canada:
The conversion shall be carried out in accordance with the requirements of
the provincial authorities having jurisdiction and in accordance with the
requirements of the CAN- 149.1 and CAN1- 149.2 Installation Code.
*A qualified service agency is any individual, firm, corporation or company which either in
person or through a representative is engaged in and is responsible for the connection,
utilization, repair or servicing of gas utilization equipment or accessories; who is experienced in
such work, familiar with all precautions required, and has complied with all of the requirements
of the authority having jurisdiction.
NORITZ America Corporation
11160 Grace Avenue
Fountain Valley, CA 92708
866-766-7489
www.noritz.com
CK-IM-3
Rev. 01/11
nstallation Gui
de
Conversion Kits: CK-11, CK-12, CK-13, CK-14, CK-15, CK-16, CK-17, CK-18,
CK
-
41
WARNING

2
1. Before Conversion
efore attempting to convert a unit, verify that the proper kit has been purchased for the model
type*:
Conversion Kit Model Conversion Type
CK-11 N-0751M/NR98-SV Propane to Natural Gas
CK-12 N-0751M/NR98-SV Natural Gas to Propane
CK-13 N-0751M-OD/NR98-OD
/NC199-OD
Propane to Natural Gas
CK-14 N-0751M-OD/NR98-OD
/NC199-OD
Natural Gas to Propane
CK-15 N-0751M-DV Propane to Natural Gas
CK-16 N-0751M-DV Natural Gas to Propane
CK-17 N-0751M-DVC/NR98-DVC Propane to Natural Gas
CK-18 N-0751M-DVC/N98-DVC
/NC199-DVC
Natural Gas to Propane
CK-41 N-0751M-DVC/N98-DVC
/NC199-DVC with uilt-In Drain
Tee
Propane to Natural Gas
*The model type can be verified from the rating plate located on the front cover of the water
heater.
Tools Required:
•Noritz Remote Controller (RC-7649M)
•Manometer (Capable of displaying digits in tenths (i.e. 2.4) and up to 20” W.C.)
•Philips screwdriver (#2 Recommended)
•Pliers
•Gas leakage device detector
NOTE: Do not attempt to perform a conversion without access to a manometer and a Noritz
remote controller. A digital manometer is recommended.

3
2. ncluded Parts
The following parts are supplied in the
conversion kit. Check for any missing
items before starting the conversion.
Parts
Shape
Quantity
Manifold Plate
1
O-Ring
2
Main Damper
(N-0751M/NR98-SV NG/LPG,
N-0751M-DV NG/LPG and N-0751-
DVC /NR98-DVC/NC199-DVC NG/LPG
only)
1
New Inlet and Manifold Pressure
Rating Sticker
1
Date, Gas Type, Kit Number, Name of
Company Sticker
1
Exhaust Ring
(N-0751M-DVC/NR98-DVC NG only)
1
Exhaust Ring
(N-0751M-DVC/NR98-DVC
/NC199-DVC NG
with uilt-In Drain Tee only)
1

4
3. Conversion Procedure
N
-
0751M
-
DVC
/NR98
-
DVC/NC199
-
DVC
Remote Controller
Parts Replacement:
1) If the display on the remote controller is on, turn off the unit by pressing the “ON/OFF”
button on the remote controller. There should be no display on the remote controller.
2) Turn off electrical power to heater by
disconnecting the electrical plug from the outlet
or shut off the breaker providing power to
water heater.
3) Turn off the gas supply to the water heater by
closing the gas shut-off valve.
4) Remove the front cover of the unit by
removing the 4 screws holding it to the
case.
5) FOR N-0751M-DVC/NR98-DVC/NC199-DVC
only: Detach the Remote Controller with
metal plate by removing the screw below (see
image).
6) Locate the six colored wire connectors (Gray, lack, Orange, White, lue, and Red) from
the electrical solenoids on the manifold from the locations indicated in Figure 1 on the
following page. Follow the wires to a white clip and disconnect it. Disconnect the gas
pipe from the gas supply inlet by removing the C-Clamp at the bottom of the gas pipe
(Figure 2). For easier access remove the mounting plate with the current leakage safety
device in front of the gas pipe.
7) Then locate and remove the 4 screws with a Philips screwdriver (Figure 1). Do NOT use
a power drill. Once screws are removed, pull the gas pipe from the gas fitting. When
the pipe and manifold have been detached, remove the gas pipe from the manifold inlet.
Remove screw
Disconnect White Clip

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Gas Pipe
F GURE 1
F GUR
E 2
Remember to remove the manifold screw. This will be used on the new manifold
plate. Discard the original manifold plate.
8) FOR N-0751M-DVC/NR98-DVC/NC199-DVC ONLY: Remove screw, feed back pipe, and
o-ring from the gas valve. This will be reinstalled on the new manifold plate.
9) FOR N-0751M/NR98-SV NG/LPG, N-0751M-DV NG/LPG, and N-0751M-DVC/NR98-
DVC/NC199-DVC NG/LPG ONLY: After manifold plate is removed, the existing damper
will be exposed as indicated in Figure 4 below. Remove screws (1), (2), (3), and then pull
the damper off the burner assembly. Check for proper size of damper with the chart
below and replace with new damper that was included with your gas conversion kit.
GRAY BLACK ORANGE
BLUE RED
WH TE
(BACK)
O-Ring
Gas Pipe
C-Clamp
Remove
Manifold
Screw
F
GURE
3

6
O-ring on
Gas Pipe
F GURE 4
10) Locate the black O-rings on the gas pipe as indicated in
Figure2 & 5. If torn or damaged, remove and replace O-
rings with the new O-rings supplied in the conversion kit.
Discard the old O-rings.
11) Insert the new manifold plate supplied with the
conversion kit. The orifice size of the gas manifold plate
should be marked as follows (check Figure 5):
N-0751M/NR98-SV, N-0751M-OD/NR98-OD/NC199-OD, and
N-0751M-DV:
•To fire Natural Gas (NG) – 2.9
•To fire Propane Gas (LPG) – 2.0
N-0751M-DVC/NR98-DVC/NC199-DVC:
•To fire Natural Gas (NG) – 3.3
•To fire Propane Gas (LPG) – 2.1
F GURE 6
DO NOT continue with conversion if manifold plate is incorrect.
Model Name Gas
Conversion Damper Size
N-0751M
/NR98-SV
NG to LPG 11
LPG to NG 13
N-0751M-DV NG to LPG 9-10
LPG to NG 9-13
N-0751M-DVC
/NR98-DVC
/NC199-DVC
NG to LPG 11
LPG to NG 9-13H
(Ex: 13 = N-0751M-NG)
F GURE 5

7
12) Make sure that the O-Ring is secured properly in place. Failure to do so will cause gas
leaks, possibly resulting in severe personal injury or death.
13) Once O-ring is in place, slide the gas pipe into the manifold inlet. Make sure that the gas
pipe is completely inserted into the manifold inlet in order to prevent any gas from
leaking.
14) Insert gas pipe into the gas supply inlet and hold the manifold plate in place.
15) Secure the new manifold plate to the unit using the screws removed in Step 7. The
screws need only to be hand tightened and should not be tightened using a drill. First,
insert screws 1-4 from Figure 1, but do not fully tighten these screws. Once all screws
are inserted, proceed to completely tighten screws 1-4.
Note: When tightening the screws, be certain to not apply excess force as the screws should
turn easily. If extra force is required, stop, remove the screw and tighten by hand first. Excess
force can strip out the original holes.
16) Attach C-Clamp at the bottom of the gas pipe (Figure 2). Failure to do so will cause gas
leaks, possibly resulting in severe personal injury or death.
17) Reconnect the white clip that contains the wires to the electrical solenoids on the
manifold from the locations indicated in Figure 1.
18) FOR N-0751M-DVC/NR98-DVC ONLY: Reinstall the o-ring, feed back pipe, and screw on
the gas valve as shown in Figure 3.
19) efore replacing the front cover, the unit must be adjusted and tested as described in
the next section.
20) FOR CONVERS ON OF N-0751M-DVC/NR98-DVC/NC98-DVC FROM NG to LPG: Locate the
exhaust ring within the exhaust pipe that is located on the top of the unit as shown in
Figure 7. Use pliers to pull the tab on the exhaust ring in order to remove the ring from
the pipe.

8
FOR CONVERS ON OF N-0751M-DVC/NR98-DVC/NC98-DVC FROM LPG to NG: Use the
exhaust ring that came included with your gas conversion kit and insert it into the
exhaust pipe “Please refer to installation manual regarding vent length”. Make sure that
the ring is completed seated inside the pipe.
F GURE 7
Adjustments:
1) efore electrical power is applied to the unit, install a remote controller to the unit if it
is not already installed.
2) Reconnect the electrical power to the unit.
3) Within the first ten minutes of connecting electrical power to the unit, but before
pressing the Power ON/OFF button (display should be blank), hold the up button on the
remote controller until the display blinks “99”. This will put the unit into Maintenance
Writer mode. If pressing the up button does not put the unit into Maintenance Writer
mode, make sure the remote display is blank, unplug the unit for sixty seconds, and try
again.
4) After accessing the Maintenance Writer mode, use the “up” and “down” buttons to
change the Maintenance Writer item number display. Pressing the “FLOW METER
ALARM SET” button for 0.5 seconds will change the item number setting from “ON” to
“OFF”. If the Priority lamp is flashing when an item number is displayed, this indicates an
“ON” setting for that item number, and if the Priority lamp is off, the item number is
“OFF”.
N-0751M-DVC/NR98-DVC/NC199-DVC
with Built-In Drain Tee

9
5) FOR N-0751M US NG NATURAL GAS (ELV C RCU T BOARD) ONLY: Use the “up” arrow
key until the remote controller displays “19”. Change “19” from “OFF” to “ON”. The
priority light should be flashing after pressing the “FLOW METER ALARM SET”.
6) Change “FC” and “FE” from OFF to ON. The priority light should be flashing on both item
numbers after pressing the “FLOW METER ALARM SET”.
7) Choose the proper conversion setting from the chart below and set the “A1”
Maintenance Writer item number according to the chart below.
Note: DO NOT change the other item numbers. This will cause a fault in the water heater.
ON: “Priority” light is
flashing.
OFF: “Priority” light is off.
8) After setting the “A1” item number for the desired gas type, press and hold the “up”
and “down” buttons together for five seconds to confirm the new settings. The remote
controller will emit a tone and the display will go blank when the settings are confirmed.
If this is not done, the unit will not put the setting changes into effect.
Note: The setting changes can be cancelled by pressing the Power ON/OFF button
before confirming the settings, or if the unit is left alone for ten minutes without
confirming the settings. If the default setting needs to be changed again, disconnect the
electrical power to the unit, reconnect it and repeat this procedure.
Testing:
1) efore turning on the gas supply to the unit, verify that the inlet gas supply pressure is
within the following operating ranges:
a. Natural Gas Supply: Min. 4 – Max. 10.5 inches
b. Propane Supply: Min. 8 – Max. 14 inches
Note: If the supply pressure is higher that the maximum allowable pressure, adjust the pressure
at the regulator or install a secondary regulator on the supply line connected to the water
heater. DO NOT attempt to operate heater if gas supply pressure is not within ranges
specified above. High supply pressure can damage the unit and possibly cause a gas leak.
Next, verify the supply pressure at the unit. To check the gas supply pressure to the unit, a tap
is provided on the gas inlet (Figure 8). Make sure gas supply is turned off to the unit. Remove
the hex head Philips screw from the tap. A 9/32” nut driver is recommended for the removal of
this screw. If a nut driver is not available, a Philips screwdriver can be used. Gently remove the
screw, so as not to strip out the screw.
Models Desired Gas Type A1
N-0751M/NR98-SV, N-0751M-
OD/NR98-OD/NC199-OD,
N-0751M-DV, and N-0751M-
DVC/NR98-DVC/NC199-DVC
Natural Gas ON
N-0751M/NR98-SV, N-0751M-
OD/NR98-OD/NC199-OD,
N-0751M-DV, and N-0751M-
DVC/NR98-DVC/NC199-DVC
Propane OFF

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2) Connect a manometer to the tap by using a
silicone tube. Turn on gas supply to unit and
confirm the supply pressure.
3) After supply pressure to heater has been
confirmed, turn off the gas supply, remove the
manometer tube and replace the hex head screw.
4) The manifold pressure will also have to be checked
using a manometer (digital manometer is
suggested). In order to check the gas manifold
pressure, a tap is provided on the manifold plate
inside the unit (Figure 9). The pressure can be
checked either by removing the Philips head screw
(1) and connecting a manometer with a silicon
tube, or by removing the 1/8” NPT screw (2) with
an Allen wrench and connecting the appropriate
pressure gauge. e sure to zero out the
manometer before attaching it to the tap.
5) Turn on the gas supply to the unit.
6) efore firing the unit, check for gas leaks at the gas inlet fitting and around the manifold
plate using a gas leak detection device.
7) If not already on, press the Power “ON/OFF” button so that the unit is in standby mode.
The priority light should be on.
8) Open up several hot water fixtures (high flow rate is required through the unit) and
allow the unit to go through its startup sequence. It may take several ignition attempts
in order to purge air from the gas chambers. If an “11” code appears on the remote
controller, reset the unit by pressing the Power button on the remote controller off and
then on again.
9) Once the heater has ignited and has begun to run continuously, locate the manifold
adjustment buttons on the right side of the circuit board (Figure 10). Check directly
below the manifold adjustment buttons for a label in order to identify the type i.e. ELV,
ELV-A, ELW, etc.
10) Press and hold the maximum pressure set button. Verify from the tables below that the
appropriate pressure is read from the manometer. If the pressure needs adjustment,
use the manifold pressure increase and decrease buttons to adjust to the correct
pressure, while continuing to hold down the maximum pressure set button.
F
GURE
8
F
GURE
9