Bosch 940 ESO Manual page 28

28 | Operation instructions
Fan speed adjustment
Altitude (above sea Minimum power fan
level) speed (P2)
0 - 2000 ft
(0 - 610 m)
2000 - 4500 ft
(610 - 1372 m)
4500 - 8000 ft
(1372 - 2439 m)
* Above 2000 ft, CO2 levels must be checked with a combustion gas analyzer, see section11.4 for instructions.
Table 15 Fan speed adjustment
Adjusting minimum power fan speed (P2)
To select fan speed:
▶ Press ON/OFF button into ON.
▶ Press and hold simultaneously buttons
seconds, until display reads P2.
Fig. 51
▶ Press to enter P2 adjustment. The current setting will appear on
P
the display (factory default).
+
▶ Press or to choose the fan speed suitable with your
installation, see table 15.
▶ Press and hold ( 5 sec.) "Program" button
flashes, then the selected value is memorized.
Proceed directly to chapter 11.4 to confirm CO
are within range.
Attention residents of the Commonwealth of Massachusetts:
In the Commonwealth of Massachusetts the following regulation went
into effect on 12/30/2005:
(a)For all side wall horizontally vented gas fueled equipment installed in
every dwelling, building or structure used in whole or in part for
residential purposes, including those owned or operated by the
Commonwealth and where the side wall exhaust vent termination is less
than seven (7) feet above finished grade in the area of the venting,
including but not limited to decks and porches, the following
requirements shall be satisfied:
1. INSTALLATION OF CARBON MONOXIDE DETECTORS. At the time of
installation of the side wall horizontal vented gas fueled equipment, the
installing plumber or gas fitter shall observe that a hard wired carbon
monoxide detector with an alarm and battery back-up is installed on the
floor level where the gas equipment is to be installed. In addition, the
installing plumber or gas fitter shall observe that a battery operated or
hard wired carbon monoxide detector with an alarm is installed on each
additional level of the dwelling, building or structure served by the side
wall horizontal vented gas fueled equipment. It shall be the
responsibility of the property owner to secure the services of qualified
licensed professionals for the installation of hard wired carbon
6 720 644 956 (2016/05)
Natural Gas
Maximum power fan
speed (P1)
7 No
modification required
8* 54*
9* 55*
+
, and for 3
P
until the display
P
values
2
Liquid propane
Maximum power fan
speed (P1)
No For operation at elevations above 2,000 ft
modification required (610 m) the equipment ratings shall be
reduced at the rate of 4% for each 1,000 ft
47*
48*
Adjusting maximum power fan speed (P1)
To select fan speed:
▶ Press ON/OFF button into ON.
▶ Press and hold simultaneously buttons
seconds, until display reads P2.
Fig. 52
▶ Press the minus button
▶ Press "Program" button
P
setting will appear on the display.
+
▶ Press or to choose the fan speed suitable with your
installation, see table 15.
▶ Press and hold ( 5 sec.) "Program" button
flashes, then the selected value is memorized.
Proceed directly to chapter 11.4 to confirm CO
are within range.
monoxide detectors.
a.In the event that the side wall horizontally vented gas fueled equipment
is installed in a crawl space or an attic, the hard wired carbon monoxide
detector with alarm and battery back-up may be installed on the next
adjacent floor level.
b. In the event that the requirements of this subdivision can not be met
at the time of completion of installation, the owner shall have a period of
thirty (30) days to comply with the above requirements; provided,
however, that during said thirty (30) day period, a battery operated
carbon monoxide detector with an alarm shall be installed.
2.APPROVED CARBON MONOXIDE DETECTORS. Each carbon
monoxide detector as required in accordance with the above provisions
shall comply with NFPA 720 and be ANSI/UL 2034 listed and IAS
certified.
3. SIGNAGE. A metal or plastic identification plate shall be permanently
mounted to the exterior of the building at a minimum height of eight (8)
feet above grade directly in line with the exhaust vent terminal for the
horizontally vented gas fueled heating appliance or equipment. The sign
shall read, in print size no less than one half (1/2) inch in size, "GAS
VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS".
(305 m) above sea level
+
, and for 3
P
to display P1.
to enter P1 adjustment. The current
until the display
P
values
2
940 ESO