Bosch C 1050 Manual

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Installation instructions11
Fig. 8 Concentric vent kit example 
3.3.2 Vent specifications 
Establish  vent  clearances  that  comply  with  the  vent 
manufacturers  specifications  and  all  applicable
national/local codes. Venting specifications
*
ULC S636-95, UL1738 certified
Condensate drain requirements 
An  external  condensate  drain  (not  supplied  with  the 
heater)  must  be  installed  under  the  following
conditions: 
• All vertical terminating vent installations. 
•...

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Installation instructions 
Maximum combustion air and exhaust pipe  
length 
The  following  tables  display  the  maximum  allowable 
straight  pipe  lengths  for  combustion  air  and  exhaus
t
piping  with  consideration  to  the  number  of  elbows
used.  Reduce  the  equivalent  length  for  each  elbow
used from the maximum allowable length depending on
the  system  used.  Refer  to  table 5  if  using  3  diamet er
venting. Refer to table 6 if using 4 diameter venti ng.Use of...

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Installation instructions13
Calculation example for 3 venting: 
Exhaust 
Combustion air
Calculation example for 4 venting: 
Exhaust 
Combustion air
System usedConcentric
Number of 90° elbows needed: 1 
Number of  45° elbows needed: 2
Table 8
Calculation of example 
Max. length 23’ 
90 ° elbow reduction - 5’
sub-total = 18’
45 ° elbow reduction - 6’
Total = 12’
Table 9
i
For this example, the maximum allowable  
exhaust pipe length is  12 feet.
System usedConcentric
Number of 90° elbows...

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Installation instructions 
Required direct vent terminal clearances (twin pipe
 / concentric penetration)
Fig. 9
* For clearances not specified in ANSI Z223.1 / NFPA  54 or CSA-B149.1, one of the following shall be indicated:
a) A minimum clearance value determined by testing  in accordance with section 2.20, or;
b) A reference to the following footnote: 
“Clearance in accordance with local installation co des and the requirements of the gas supplier.”
6720608836-23.1Av
Canadian...

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Installation instructions15
Required other than direct vent terminal clearances
 (single pipe penetration)
Fig. 10
* For clearances not specified in ANSI Z223.1 / NFPA  54 or CSA-B149.1, one of the following shall be indicated:
a) A minimum clearance value determined by testing  in accordance with section 2.20, or;
b) A reference to the following footnote: 
“Clearance in accordance with local installation co des and the requirements of the gas supplier.”
6720608836-23.1Av
Canadian...

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Installation instructions 
3.3.3 Vent configuration examples 
Below are approved examples of vertical and horizon
tal 
venting installations. 
Fig. 11 Vertical venting system (single pipe penetra -
tion)
Fig. 12 Horizontal venting installation (combustion  air
piping not shown)
Warning: Single pipe penetration should be used in  
non-freezing climates only! Fig. 13 Horizontal venting system (concentric vent) 
Fig. 14 Horizontal parallel venting system (twin pip
e 
direct vent)...

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Installation instructions17
Fig. 15 Horizontal venting system (single pipe pene-
tration)
*Warning: Single pipe penetration should be  
used in non-freezing climates only! 
3.3.4 Vent connections
Attaching the exhaust and air inlet connection  
adaptors to the top of the heater B Attach the flue gas exhaust accessory to the top of  
the unit Fig. 16 (position 1) using the 4 screws an d 
gasket provided, and fully insert vent pipe into th e 
accessory. If using 4 venting, a 3 to 4 increase r...

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Installation instructions 
Appliance condensate drain installation 
The  appliance  comes  equipped  with  an  internal 
condensate drain and siphon. This drains condensati
on
formed  in  the  secondary  heat  exchanger.  Piping  must
be  installed  under  the  condensate  drain  outlet  on  t he
water heater and piped for disposal in accordance w ith
local codes. 
Fig. 18 Appliance drain installation External condensate drain installation 
If an external condensate drain (installer...

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Installation instructions19
Backdraft reducer 
The Heat Fab backdraft reducer (9301BFP) is the pre
-
ferred option for limiting backdraft (see Fig. 20).
Note: The following solution is available only for  
3 diameter venting. 
Fig. 20 Part nr 9301BFP 
Installation 
For this solution to be effective, the internal fla pper must 
be 100% closed when the water heater is not running . 
Refer to Figures 22 and 23 for preferred installation  
positions in the vent system. 
Installation...

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Installation instructions 
3.3.7 Fan speed adjustment 
! 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  altit ude
and  vent  pipe  length.  Failure  to  make  necessary
adjustments to fan speed values may...