WW
WW
W
ARNINARNIN
ARNINARNIN
ARNIN
GG
GG
G
LP & NLP & N
LP & NLP & N
LP & N
G ARE EXTREMELG ARE EXTREMEL
G ARE EXTREMELG ARE EXTREMEL
G ARE EXTREMEL
Y FLY FL
Y FLY FL
Y FL
AMMABLE SOAMMABLE SO
AMMABLE SOAMMABLE SO
AMMABLE SO
TT
TT
T
AKE EXTRA PRECAAKE EXTRA PRECA
AKE EXTRA PRECAAKE EXTRA PRECA
AKE EXTRA PRECA
UTIONS WHENUTIONS WHEN
UTIONS WHENUTIONS WHEN
UTIONS WHEN
PERFPERF
PERFPERF
PERF
ORMINORMIN
ORMINORMIN
ORMIN
G ANY WG ANY W
G ANY WG ANY W
G ANY W
ORK TORK T
ORK TORK T
ORK T
O THE HEAO THE HEA
O THE HEAO THE HEA
O THE HEA
TERTER
TERTER
TER
CT-14
page 1 of 1
rev 10/06
Bosch Water Heating
340 Mad River Park, Waitsfield, VT 05673
©BBT NORTH AMERICA CORPORATION
Bosch Group
UNLOCKING THE REGULATOR
MODELS: 1000P, 1600P, 1600H,
260PN, 425PN, 425HN
If the Maxitrol regulator supplied with your water heater
is fed gas or air at too high a pressure, it will cause it to
“lock up” and stop delivering gas to heater. This is the
method for “unlocking” the maxitrol regulator.
NN
NN
N
oo
oo
o
tt
tt
t
e: e:
e: e:
e: This procedure should only be per formed
by a licensed gas technician
1. Shut off main gas supply to heater.
2. Locate Maxitrol regulator at bottom of water heater.
3. Confirm that the arrow on the back of the regulator is
pointing up towards the heater and in the same direc-
tion of gas flow. If not, the regulator is installed up-
side down. Reinstall so that the arrow indicates the
proper direction of gas flow.
4. Unscrew slotted cap. (Fig.1)
5. The inner plug needs to be returned to the same spot
after unlocking so count threads or measure to facili-
tate this.
6. Turn inner plug counter-clockwise to remove.
7. Remove spring (do not lose).
8. Use the eraser on end of pencil to push in on the dia-
phragm to return to unlocked position.
9. Install spring first, then install plug and turn clock-
wise to return to measured position.
10. Reinstall slot ted cap.
11. Return heater to service after correcting over pres-
sure situation.
FIGURE 1
slotted cap
gas flow
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