Bosch CWH 1000 P, Service Bulletin Booklet

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W W W W WARNIN ARNIN ARNIN ARNIN ARNING G G G G
LP & N LP & N LP & N LP & N LP & NG ARE EXTREMEL G ARE EXTREMEL G ARE EXTREMEL G ARE EXTREMEL G ARE EXTREMELY FL Y FL Y FL Y FL Y FLAMMABLE SO AMMABLE SO AMMABLE SO AMMABLE SO AMMABLE SO
TTTTTAKE EXTRA PRECA AKE EXTRA PRECA AKE EXTRA PRECA AKE EXTRA PRECA AKE EXTRA PRECAUTIONS WHEN UTIONS WHEN UTIONS WHEN UTIONS WHEN UTIONS WHEN
PERF PERF PERF PERF PERFORMIN ORMIN ORMIN ORMIN ORMIN G ANY W G ANY W G ANY W G ANY W G ANY WORK T ORK T ORK T ORK T ORK TO THE HEA O THE HEA O THE HEA O THE HEA O THE HEATER TER TER TER TER
CT-04
page 1 of 1
rev 10/06
Bosch Water Heating
340 Mad River Park, Waitsfield, VT 05673
© BBT NORTH AMERICA CORPORATION
Bosch Group
CHECKING GAS PRESSURE
MODELS: 1000P, 1600P, 1600H
260PN, 425PN, 425HN
A. Connecting manometer:
1. Turn off gas using installer supplied manual shutoff.
2. Remove front cover (see manual for instructions) and lo-
cate inlet gas pressure tap above the regulator on the gas
inlet pipe and the manifold gas pressure tap on the right
side directly below the burner (Fig. 1).
3. Select appropriate pressure tap per specific pressure test
(see steps B and C). Loosen the screw from test point fit-
ting (do not remove) and connect manometer tube on test
point.
B. Static pressure test (Inlet pressure tap
only)
1. Turn gas supply back on.
2. Operate all other gas appliances at maximum output.
3. Record static pressure reading in Table 1.
4. Leave manometer connected to inlet tap for operating pres-
sure test.
C. Operating pressure test
1. Light pilot if neccessary (1000P, 1600P, 260PN and 425PN
models).
2. All other gas appliances should still be running at full ca-
pacity.
3. Set heater to maximum output:
1000P, 1600P, 260PN, 425PN:
Set gas slide control to the right. Turn temperature
adjustment knob full clockwise.
1600H, 425HN:
Turn power adjustment knob full clockwise. Turn
temperature adjustment knob full clockwise.
4. Open all hot water taps supplied by this unit.
5. Record inlet tap operating pressure reading in Table 1.
6. Turn off gas supply as well as all hot water taps. Disconnect
manometer from the inlet tap. Tighten screw in tap fitting
or gas leak may occur.
7. Reconnect manometer to the manifold gas pressure tap.
8. Turn gas supply back on and follow steps 1 through 4.
9. Record manifold tap operating pressure reading in Table 1.
10. Turn off gas supply as well as all hot water taps. Disconnect
manometer from the manifold tap. Tighten screw in tap fit-
ting or gas leak may occur.
11. Put cover back on water heater, open gas supply and return
heater to service.
TABLE 1
Static gas pressure: “ W.C.
Required static gas pressure (all models:
NG 7” - 14” W.C.
LPG 11” - 14” W.C.
Operating gas pressure:
Inlet Tap “ W.C.
Manifold tap “ W.C.
Minimum require operating gas pressure:
GAS PRESSURE TEST POINTS
Mainfold tap
Inlet tap
FIGURE 1