Winterizing For Seasonal Use; Draining The Heater - Bosch GWH 260 PN Service Bulletin Booklet

WINTERIZING FOR SEASONAL USE

MODELS: 1000P, 1600P, 1600H
260PN, 425PN, 425HN
Please note that the instructions in the manual state that the water heater must not be installed in a location where
it may be exposed to freezing temperatures. If the heater must be left in a space which is likely to experience freezing
temper atures (less then 32º F), all water must be drained from the heater. Damage as a result of improper drainage
will not be covered under warranty.

Draining the heater

1. Shut off gas to heater.
2. Shut off water supply to the heater using ins taller sup-
plied cold water isolation valve. If none installed, in-
stall before proceeding.
3. Open lowest hot water faucet to drain lines and re-
lieve pressure in heater.
4. Position a bucket below water connections to water
heater.
5. Remove the retaining clip (F ig. 1, Num. 1) from the
thr eaded bushing.
6. Remove the threaded bushing (Fig. 1, Num. 2) from
the water valve.
7. Contents of he ater and water lines will dr ain.
8. Removal of piping between the water valve and heat
exchanger may be necessar y to ensure all water has
been drained (Fig. 1, Num. 3)
On Models 1000P , 1600P, 260PN, 425PN:
Remove retaining clips at water val ve and heat ex-
changer connections.
On Models 1600H, 425HN:
Remove reatining clips at water val ve and base of
hydrogenerator.
9. Remove piping and save f or reinstallation when heater
is returned to service.
Note: If using the AQ4 powervent, all flow
switch piping should be disconnected and
drained.
©BBT NORTH AMERICA CORPORATION
Bosch Group
W W W W W ARNIN ARNIN ARNIN ARNING G G G G
ARNIN
LP & N LP & N G ARE EXTREMEL G ARE EXTREMEL
LP & NG ARE EXTREMEL LP & N LP & N G ARE EXTREMEL G ARE EXTREMELY FL
T T T T T AKE EXTRA PRECA AKE EXTRA PRECAUTIONS WHEN AKE EXTRA PRECA AKE EXTRA PRECA UTIONS WHEN UTIONS WHEN UTIONS WHEN
AKE EXTRA PRECA UTIONS WHEN
PERF PERFORMIN PERF ORMIN ORMIN ORMIN G ANY W G ANY WORK T G ANY W G ANY W
PERF PERF ORMIN G ANY W
FIGURE 1
340 Mad River Park, Waitsfield, VT 05673
Y FL Y FL AMMABLE SO AMMABLE SO
Y FLAMMABLE SO Y FL AMMABLE SO AMMABLE SO
ORK T ORK TO THE HEA ORK T O THE HEATER O THE HEA O THE HEA TER TER TER
ORK T O THE HEA TER
Bosch Water Heating
CT-11
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rev 10/06