Bradford-White Corp BRHHV Manual De Usuario

Page 13

At the time of removal of an existing boiler, the 

following steps shall be followed with each appliance 
remaining connected to the common venting system 
placed in operation, while the other appliances 
remaining connected to the common venting system are 
not in operation.
1. 

Seal any unused openings in the common venting 
system.

2. 

Visually inspect the venting system for proper 
size and horizontal pitch and determine there is 
no blockage or restriction, leakage, corrosion and 
other deficiencies which could cause an unsafe 
condition.

3. 

Insofar as it is practical, close all building doors 
and windows and all doors between the space in 
which the appliances remaining connected to the 
common venting system are located and other 
spaces of the building. Turn on clothes dryers 
and any appliance not connected to the common 
venting system. Turn on any exhaust fans, such 
as range hoods and bathroom exhausts, so they 
will operate at maximum speed. Do not operate a 
summer exhaust fan. Close fireplace dampers.

4. 

Place in operation the appliance being inspected. 
Follow the lighting instructions. Adjust thermostat 
so appliance will operate continuously.

5. 

Test for spillage at the draft hood relief opening 
after 5 minutes of main burner operation. Use 
the flame of a match or candle, or smoke from a 
cigarette, cigar or pipe.

6. 

After it has been determined that each appliance 
remaining connected to the common venting 
system properly vents when tested as outlined 
above, return doors, windows, exhaust fans, 
fireplace dampers and any other gas burning 
appliance to their previous conditions of use.

7. 

Any improper operation of the common venting 
system should be corrected so that the installation 
conforms to the National Fuel Gas Code, ANSI 
Z223.1/NFPA 54 and/or CSA B149.1, Installation 
Codes. When resizing any portion of the common 
venting system, the common venting system 
should be resized to approach the minimum size 

as determined using the appropriate tables 
and guidelines in the National Fuel Gas Code, 
ANSI Z223.1 NFPA 54 and/or CSA B149.1, 
Installation Codes.

Gas piping should be supported by suitable 

hangers or floor stands, not the appliance.

Review the following instructions before 

proceeding with the installation.
1. 

Verify that the appliance is fitted for the 
proper type of gas by checking the rating plate. 
Appliances are normally equipped to operate at 
elevations up to 2000 feet (610m). However, 
the appliance will function properly without the 
use of high altitude modification at elevations 
up to 10,000 feet (3050 m).

2. 

The maximum inlet gas pressure must not 
exceed 13" W.C. (3.2kPa). The minimum 
inlet natural gas pressure is 4" W.C. (1.0kPa) 
and minimum inlet propane gas pressure is 6" 
(1.5kPa).

3. 

Refer to Table 6, size supply.

4. 

Run gas supply line in accordance with all 
applicable codes.  

 

Note:  If you have a boiler/water heater with 
a normally open vent valve, install a vent line 
from the vent valve to an outside location 
as required by your installation code or IRI 
requirement.  Do not remove 3/4 inch pipe 
plug from the vent valve if venting from the 
normally open vent valve is not required by 
your installation code.

5. 

Locate and install manual shutoff valves in 
accordance with state and local requirements.

6. 

A sediment trap must be provided upstream of 
the gas controls.

Size and 

Gas Type 0-50 

feet 

0-15m 50-100 

feet 

15-31m 100-200 

feet 

31-61m 200-300 

feet 

1200 natural 

2" 

5.1cm 2-1/2" 

6.4cm 2-1/2" 

6.4cm 3" 

1200 propane 

1-1/2" 

3.8cm 2" 

5.1cm 2" 

5.1cm 2-1/2" 

1600 natural 

2-1/2" 

6.4cm 2-1/2" 

6.4cm 3" 

7.6cm 3" 

1600 propane 

2" 

5.1cm 2" 

5.1cm 2-1/2" 

6.4cm 2-1/2" 

2000 natural 

3" 

7.6cm 3" 

7.6cm 3" 

7.6cm 3-1/2" 

2000 propane 

2-1/2" 

6.4cm 2-1/2" 

6.4cm 2-1/2" 

6.4cm 3" 

2400 natural 

2-1/2" 

6.4cm 3" 

7.6cm 3" 

7.6cm 3-1/2" 

2400 propane 

2" 

5.1cm 2-1/2" 

6.4cm 2-1/2" 

6.4cm 3" 

Notes: 

1. These figures are based on 1/2" 0.12kPa water column pressure drop.

 

2. Check supply pressure and local code requirements before proceeding with work.

 

3. Pipe fittings must be considered when determining gas pipe sizing.