Bosch C 1050 Manual

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Installation instructions21
Natural GasLiquid 
propane
Altitude 
(above sea  level)Vent 
terminalTotal equivalent  vent length1)Minimum power fan speed (P2)Maximum 
power fan 
speed (P1)Maximum 
power fan 
speed (P1)
0 - 2000 ft
(0 - 610 m) Concentric 6 - 25 ft 13
No 
modification  required No 
modification  required For operation at eleva-
tions above 2,000 ft (610 m) the  equip-
ment ratings shall be 
reduced at the rate of  4% for each 1,000 ft  (305 m) above sea 
level
26 - 46 ft 13...

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Installation instructions 
Adjusting minimum power fan speed (P2) 
To select fan speed: B
Press ON/OFF button   into OFF.
B Press  and  hold  Program    button  and  press 
ON/OFF button   to turn appliance ON.
Fig. 24 B As  soon  as  188  is  displayed,  release  Program 
button  , and the display reads P2.
B Press   to enter P2 adjustment. The current set-
ting will appear on the
 display (factory default: 12).
B Press   or   to choose the fan speed suitable  
with your installation,...

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Installation instructions23
Attention residents of the Commonwealth of Massachu
setts:
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...

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Installation instructions
3.4 Combustion air requirements
Twin pipe and Concentric pipe 
The  water  heater  is  designed  as  a  sealed  combustion 
appliance.  It  is  recommended  that  the  combustion  ai
r
be  provided  by  a  dedicated  3”  or  4”  pipe  from  the
outside (twin pipe) or by connecting to the Concent ric
vent  kit  (see  Fig. 8).  The  combustion  air  pipe  may  b e
PVC  or  any  other  rigid  sealed  3  or  4  pipe.  The
combustion  air  piping  must  pitch  down...

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Installation instructions25
3.5 Proper location for installing your heater
Carefully  select  the  location  of  the  water  heater.  For
your  safety  and  for  proper  heater  operation,  you  mu st
provide  combustion  air  to  the  heater  and  a  proper 
exhaust vent system.
Follow the guidelines below: B 1.  Locate  the  heater  where  venting,  gas  and
plumbing connections are feasible and convenient.
B 2.  The  hot  water  lines  should  be  kept  short  and
insulated to save...

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Installation instructions 
Fig. 27 Leveling wall mounting bracket 
Fig. 28 Mounting the heater
3.8Gas piping & connections 
Before  connecting  the  gas  supply,  check  the  rating 
plate on the right side of the heater to be sure th
at the
heater  is  rated  for  the  same  gas  to  which  it  will  b e
connected.
In the United States: The installation must conform  with
local  codes  or,  in  the  absence  of  local  codes,  the
National Fuel Gas Code ANSI Z223.1/NFPA 54.
In Canada:...

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Installation instructions27
Fig. 29 Gas connection 
Once connections are made, check for gas leaks at a
ll 
joints. Apply some gas leak detection solution to a ll gas 
fittings. Bubbles are a sign of a leak. A combustib le gas 
detector may also be used to detect for leaks. 
GAS LINE SIZING 
The  gas  supply  piping  for  a  single  heater  should  be 
sized for a maximum draw of 199,000 BTUH. Measure
the  length  of  gas  supply  line  from  the  buildings  g as
main  to  the  heater  and...

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Installation instructions
FOR NATURAL GAS
Maximum Capacity of pipe in Cubic Feet of Gas per H
our for Gas Pressure of 0.5 Psig or less and a Pressure drop
of 0.3” in Water Column (0.75mbar).(Based on a 0.60  Specific Gravity Gas) Btu numbers given in thousands.
Fig. 31
Follow boxed numbers for piping just one C 1050 ES  (example: ¾” B.I. Natural Gas pipe for 10 ft (3.0m).
will handle 278,000 btu’s (81.5 kWh). For multiple  appliances combine the total maximum btu input load  and
then...

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Installation instructions29
3.9 Water connections 
BWhen facing the heater, the ¾” cold connection is o n 
the bottom right and the hot connection is on the b ot-
tom left. Centrally locating the water heater is re com-
mended to keep hot water distribution times even  
throughout the structure.
Fig. 32 
Fig. 33 Water filter
1 Water valve with engine
2 Water filter
BThe use of unions when connecting both water 
pipes  to  the  inlet  and  outlet  connections  is
required.  This  will...

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Installation instructions 
Connecting the pressure relief valve (PRV) 
A  listed  pressure  relief  valve  must  be  installed  at
  the
time of installation.  No valve is to be placed between
the  PRV  and  the  heater .  No  reducing  coupling  or
other  restriction  may  be  installed  in  the  discharge   line.
The  discharge  line  must  be  a  minimum  of  4”  above  a 
drain and installed such that it allows complete dr ainage
of both the PRV and the line. The discharge line mu st...