Noritz NRC661-DV, Service Manual, Page: 62 / 78

Setting list for MW settings and Gas manifold pressures (Check the rating plate for model and gas type)
Manual Programming
1. Make sure the remote controller is off ( completely blank ), If it is ON, turn it OFF and wait for 10 seconds.
(only do this if the data transfer on the previous page is unsuccessful)
This procedure will require the remote controller.
Make sure the circuit board is completely connected.
2. ...then disconnect
electrical power.
3. Wait 10 seconds and reconnect power.
Leave the remote controller off.
PRIORITY light
UP / DOWN button
display
( MW number )
power ON/OFF button
FLOW METER ALARM SET button
4. With the remote controller blank, press the up button until the display blinks "99".
You are now in the maintenance writer (MW) mode and can scroll through the
MWs using the UP and DOWN buttons.
[ Remote controller ]
5. Once complete, hold the UP and DOWN buttons together for five seconds until the remote
controller starts beeping rapidly.
This is the signal that the changes to the MWs have been saved and the unit is ready for use.
6. Check manifold pressures with a digital manometer and adjust if necessary.
For each MW the PRIORITY light will either be on, indicating that the MW is
ON, or off, indicating the MW is OFF.
You can toggle each MW to be ON or OFF using the FLOW METER ALARM SET
button.
a) MW "#23" must be ON for all units except the NRC661-DV/OD.
b) Turn MW "FC" and "FE" ON and press the UP or DOWN button.
(Display blinks with "A0 ". )
Configure the remaining MWs according to the chart below based on your unit's
model and gas type.
Model
Gas type
Circuit board MW setting
A1
NRC661-DV
LPG
Natural
Min value Max value
NRC661-OD
LPG
Natural
Vent Length Adjustment
-DV(-SV) Model only
Dip Switch 7 Vent Length
Short Length
Long Length
Short Length
Long Length
(
:ON :OFF
)
1.05 3.15
1.05 3.20
1.30 3.15
1.30 3.15
1.05 3.10
1.20 3.20
NRC711-DV
NRC711-OD
NR501-OD
NR662-OD
3.05
3.10
3.55
3.60
2.75
3.45
2.70
3.05
2.80
2.85
1.05
1.05
1.20
1.20
0.95
1.20
1.05
1.25
1.25
1.30
LPG
Natural
LPG
Natural
LPG
Natural
LPG
Natural
LPG
Natural
Short Length
Long Length
Short Length
Long Length
A2 A3 A4 A5 A6 A8 A9 AA AB AE AF B0 B1 BC A7 C8
Manifold Pressure (inch H
2
O)
Cover off
NRC661A-DV
NRC661A-OD
Natural
LPG
Short Length
Long Length
Short Length
Long Length
1.05 3.15
1.05 3.20
1.30 3.15
1.30 3.15
1.05 3.10
1.20 3.20
LPG
Natural
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