American Water Heater BCL3 95T199 6NOX Benutzerhandbuch

24

Installation  and  start  up  of  this  water  heater  requires  abilities 

and skills equivalent to that of a licensed tradesman in the field 

involved, see qualifications on page 6.
Do not place the water heater in operation if any part has been 

under  water.  Immediately  call  a  qualified  service  technician  to 

inspect the water heater and to replace any part of the control 

system and any gas control which has been under water. 
light  the  water  heater  in  accordance  with  the  lighting  and 

Operation Instruction label on the water heater and in this manual 

on page 26.
The  water  heaters  covered  by  this  manual  are  equipped  with 

an  electronic  control  system  that  automatically  sequences  the 

blower,  the  Igniter,  the  24  VAC  Gas  Valve,  burner  ignition, 

and flame sensing. The control system will lock out after three 

unsuccessful ignition attempts.
before  attempting  start  up,  thoroughly  study  and  familiarize 

yourself with the exact Sequence Of Operation, see the written 

Sequence  Of  Operation  on  page  26  and  the  Sequence  Of 

Operation Flow Chart on page 27.
be certain that the water heater is full of water, that air is purged 

from the gas and water lines and that there are no leaks in the 

gas and water lines. ensure all inlet water valves are open.

filling the water heater
Follow these steps to fill the water heater prior to start up.
1. Close the heater drain valve.
2. Open a nearby hot water faucet to permit the air in the system 

to escape.

3. Fully open the cold water inlet valve allowing the piping and 

water heater to fill with water.

4. Close the hot water faucet opened in Step 2 as water starts to flow.
supply gas line purging

Read instruction manual before

installing, using or servicing

water heater.

To avoid risk of fire or explosion purge discharge must not

enter into confined areas or spaces where ignition can occur.
The area must be well ventilated and all sources of ignition

must be deactivated or removed.

Gas line purging is required with new piping or systems in

which air has entered.

Use only the gas shown on the water heater rating label.
Keep ignition sources away from faucets after extended

periods of non-use.

1. Close the Main Gas Shutoff Valve, see Figure 21 on page 23.
2. Purge all air from the supply gas line up to the water heater’s 

Main Gas Shutoff Valve.

3. When all air has been purged from the supply gas line, tighten 

all supply gas line connections. 

4. Check for gas leaks, see Gas line leak Testing on page 23 

and repair any leaks found.

required test equipment
U-tube  manometer,  pressure  gauge,  or  digital  manometer. 

recommended range: 20” W.C. (5 kPa).
note:  All  test  equipment  must  be  acclimated  to  ambient 

temperature before calibration and use.
preparation

1. Adjust the thermostat to the lowest temperature setting.
2. Turn the water heater’s on/off switch to the “off” position.
3. Close the Main Gas Shut Off Valve, see Figure 21 on page 23.
4. Wait five (5) minutes for any residual gas to clear.
5. Open the Supply Gas Pressure Port on the gas valve by turning 

the center screw counter-clockwise. Connect the manometer 

to the supply gas pressure test port, see Figure 22 on page 25.

6. Open the Main Gas Shutoff Valve.
7. Measure and record the supply gas pressure, this is a “static” 

supply gas pressure reading; while the water heater is not firing.

1. Turn the water heater’s on/off switch to the “on” position.
2. Adjust the thermostat to the desired water temperature.
3. record the supply gas pressure when the 24 VAC Gas Valve is 

energized and the burner is operating. This is a “dynamic” gas 

pressure reading; while the water heater is firing.

4. Compare  the  actual  supply  gas  pressure  reading  recorded  

above  to  the  required  minimum/maximum  values  given  in 

Table 3 on page 8. Adjust supply gas pressure as necessary, 

see the instructions that follow.

5. After the supply gas pressure adjustments are complete, turn 

off  the  water  heater  and  close  the  Main  Gas  Supply  Shut 

Off  Valve.  Disconnect  the  manometer  from  the  Supply  Gas 

Pressure  Port  and  turn  the  center  screw  clockwise  until  the 

port is closed.

Turn off gas lines during installation.
Contact a qualified installer or service

agency for installation and service.

Excessive gas pressure to gas valve can

cause serious injury or death.

Do not use water heater with any gas

other than the gas shown on the rating

label.