Bosch 830 ES - Page 30

Installation instructions
830 ES – 6 720 644 936 (2021/08)
30
Fig. 26 Combustion air piping not shown for clarity purposes
[1] Good
[2] Better
[3] Best
[4] Enclosed vent pipe (Do not install damper)
[5] Unconditioned space (Do not install damper)
[6] Preferred damper position for vertical terminations
4.3.7 Venting for manufactured (mobile) homes
WARNING:
▶ In a manufactured (mobile) home installation, combustion
air shall not be supplied from occupied spaces.
When this appliance is installed in a mobile home, it is required
that the venting be installed such that all combustion air is
provided from outside the structure. As such, single pipe
venting installations are forbidden in mobile home
installations. Appropriate flue gas venting parts are listed in the
table 22:
Table 22 Z-Flex Venting list
4.3.8 Fan speed adjustment
NOTICE:
IMPORTANT INFORMATION!
▶ Natural gas heaters with installation altitudes below 2,000
ft above sea level disregard this section.
Installation adjustment:
After installing the tankless water heater, the fan speed values
for minimum power (P2) and maximum power (P1) may need
adjustment due to variations in altitude and vent pipe length.
Failure to make necessary adjustments to fan speed values may
result in improper operation of the appliance.
First calculate the total equivalent vent length. This is the
straight pipe length of both exhaust and combustion air plus the
number of elbows used. To determine the length equivalency of
each elbow refer to table 9.
Use the equivalent vent length value to determine the
appropriate fan speed values found in table 23 and 24. Refer
to page 32 on how to adjust the fan speeds if an adjustment is
necessary. After changing fan speed values, proceed to
chapter 7.4 to confirm CO
2
values are within specified ranges.
3" Venting Z-flex Venting
24" Drain Tube Kit 2SVEDTK24
3" x 45° Elbow 2SVEEWCF0345
3" x 90° Elbow 2SVEEWCF0390
3" x 6" Pipe 2SVEPWCF03.5
3" x 12" Pipe 2SVEPWCF0301
3" x 18" Pipe 2SVEPWCF0301.5
3" x 2' Pipe 2SVEPWCF0302
3" x 3' Pipe 2SVEPWCF0303
3" x 4' Pipe 2SVEPWCF0304
Inline Vertical Tee 2SVEVDP03
3" Roof Flashing 0/12-6/12 2SVSADJF03
3" Roof Flashing 7/12-12/12 2SVSADJSF03
3" Rain Cap 2SVSRCF03
3" Custom Wall Thimble 2SVSWTCEC03
w/10" Sleeve (Qty 2) 2SVSTB03
3" Adjustable Adapter 4ZVAL03
3" Gear Clamps (Qty 2) 7HS44XX
3" Storm Collar 2SVSLSF03
Extreme Weather Termination* 2SVSHRC03
Horizontal Drain Tee 2SVEDWCF03