American Water Heater 80 Thermal Efficiency UltraLow NOx Heavy Duty Commercial Gas Water Heater BCL3 User Manual

11
HIGH ALTITUDE INSTALLATIONS
Fire and Explosion Hazard
Gas and carbon monoxide detectors ar e
available.
Overfiring could result in fire or
explosion. Under no circumstances should the 
input exceed the rate shown on the 
water heater ’s rating label.  
Breathing Hazard - Carbon Monoxide Ga s
Breathing carbon  monoxide can cause brain  damage or
death.  Always read and understand  instruction  manual.
Under no circumstances should the input
exceed the rate shown on the water
heater’s rating label....

12
Some addition adjustment maybe required later to maintain 
a steady gas supply pressure.
5.  When  installing  multiple  water  heaters  in  the  same  gas 
supply  system  it  is  recommended  that  individual  positive 
lock-up gas pressure regulators be installed at each unit.
POWER SUPPLY
The  water  heaters  covered  in  this  manual  require  a  120  VAC, 
1Ø  (single  phase),  60Hz,  15  amp  power  supply  and  must  also 
be electrically grounded in accordance with local codes or, in the...

13
HOT WATER
OUTLET
TO TA NK
INLET
CHECK
VA LVE MIXING
VA LVE
COLD
WA TER
INLET TEMPERED WA
TER
OUTLET
12”  TO 15”
(30-38 cm)
CHECK VA LVE
FIGURE 10.
DISHWASHING MACHINES
All  dishwashing  machines  meeting  the  National  Sanitation 
Foundation requirements are designed to operate with water 
flow pressures between 15 and 25 pounds per square inch 
(103  kPa  and  173  kPa).  Flow  pressures  above  25  pounds 
per square inch (173 kPa), or below 15 pounds per square 
inch  (103  kPa),  will  result  in...

14
No  valve  or  other  obstruction  is  to  be  placed  between  the 
Temperature-Pressure Relief Valve and the tank. Do not connect 
discharge  piping  directly  to  the  drain  unless  a  6”  (15.2  cm) 
air  gap  is  provided.  To  prevent  bodily  injury,  hazard  to  life,  or 
property  damage,  the  relief  valve  must  be  allowed  to  discharge 
water  in  adequate  quantities  should  circumstances  demand.  If 
the  discharge  pipe  is  not  connected  to  a  drain  or  other  suitable...

15
provide combustion, ventilation and dilution air.
Unusually Tight Construction
In  unconfined  spaces  in  buildings,  infiltration  may  be  adequate 
to  provide  air  for  combustion,  ventilation  and  dilution  of  flue 
gases.  However,  in  buildings  of  unusually  tight  construction  (for 
example,  weather  stripping,  heavily  insulated,  caulked,  vapor 
barrier,  etc.)  additional  air  must  be  provided  using  the  methods 
described in the Confined Space section that follows....

16
FRESH AIR OPENINGS FOR CONFINED SPACES
The  following  instructions  shall  be  used  to  calculate  the  size, 
number  and  placement  of  openings  providing  fresh  air  for 
combustion,  ventilation  and  dilution  in  confined  spaces.  The 
illustrations shown in this section of the manual are a reference 
for  the  openings  that  provide  fresh  air  into  confined  spaces 
only. DO NOT refer to these illustrations for the purpose of vent 
installation.  See  Venting  Installation  on  page...

17
When ducts are used, they shall be of the same cross sectional 
area  as  the  free  area  of  the  openings  to  which  they  connect. 
The minimum dimension of rectangular air ducts shall be not less 
than 3 inches.
AIR FROM OTHER INDOOR SPACES
FIGURE 18.
The  confined  space  shall  be  provided  with  two  permanent 
openings, one commencing within 12 inches (300 mm) of the top 
and one commencing within 12 inches (300 mm) of the bottom of 
the enclosure. See Figure 18.
Each  opening  shall...

18
VENTING INSTALLATION
VENTING
THE INSTRUCTIONS IN THIS SECTION ON VENTING MUST 
BE FOLLOWED TO AVOID CHOKED COMBUSTION OR 
RECIRCULATION OF FLUE GASES. SUCH CONDITIONS CAUSE 
SOOTING OR RISKS OF FIRE AND ASPHYXIATION.
This heater is not approved for direct vent installation.
Heater must be protected from freezing downdrafts.
Remove all soot or other obstructions from the chimney that will 
retard a free draft.
Type B venting is required with these heaters. For typical venting 
application see TECHNICAL...

19
TYPE B GAS VENT
Multiple Gas Fired Tank-Type Heaters
When venting multiple tank type heaters using Type B vent 
pipe,  follow  the  installation  diagram  (figure  13)  and  tables 
below which give sizing and data based upon NFPA 54/ANSI 
Z223. 2006. 
TABLE 6. TECHNICAL DATA VENTING
Model BCL380T1206NOX
Input: 120,000 Btu/hrTotal Vent Height (Feet)
Vent connector size: 6 inches 6810 15203050100
Input Btu/hr Rise Vent Connector Diameter (Inches)
120,000 1 ft.66555555
120,000 2ft.55555555
120,000...

20
TABLE 6. TECHNICAL DATA VENTING (Continued)
Model BCL3100T2756NOX
Input: 275,000 btu/hrTotal Vent Height (Feet)
Vent connector size: 6 inches 6810 15203050100
Input Btu/hr Rise Vent Connector Diameter (Inches)
275,000 1 ft.88877666
275,000 2 ft.88777666
275,000 3 ft.77777666
Number of Heaters Combined Input (Btu/hr) Manifold and Common Vent Diameter (Inches)
2 550,0001010 998877
3 825,0001412121010 998
4 1,100,00014141412121210 9
Model BCL386T3106NOX
Input: 310,000 btu/hr Total Vent Height (Feet)
Vent...