Connection Of Gas Pipe; Relief Valve - A.O. Smith BTX-80 Operation Manual

WARNING
VENT HOOD(S) MAY BE
EXTREMELY HOT
DURING OPERATION.
REFER TO FIG. 1 FOR CONNECTION DETAILS. BEFORE
ATTACHING THE GAS LINE BE SURE THAT ALL GAS PIPE IS
CLEAN ON THE INSIDE.
TO TRAP ANY DIRT OR FOREIGN MATERIAL IN THE GAS
SUPPLY LINE, A DIRT LEG (SOMETIMES CALLED DRIP LEG)
MUST BE INCORPORATED IN THE PIPING, FIGURE 1.
leg must be readily accessible. Install in accordance with
recommendations of serving gas supplier. Refer to the current
edition of ANSI Z223.1.
To prevent damage, care must be taken not to apply too much
torque when attaching gas supply pipe to thermostat gas inlet.
The thermostat inlet has a pad for use with a backup wrench.
Apply joint compounds (pipe dope) sparingly and only to the male
threads of pipe joints. Do not apply compound to the first two
threads. Use compounds resistant to the action of liquefied
petroleum gases. Do not use teflon tape on thermostat fittings.

CONNECTION OF GAS PIPE

1. When connecting gas pipe to unit, apply wrench to flange
only. Note: Do not use wrench on gas valve or gas valve
bracket.
2. PERFORM THE GAS LEAK TEST ANY TIME WORK IS DONE
ON A GAS SYSTEM TO AVOID THE POSSIBILITY OF FIRE
OR EXPLOSION WITH PROPERTY DAMAGE, PERSONAL
INJURY, OR LOSS OF LIFE.
The Gas Leak Test is performed as follows: Paint pipe
connections upstream of gas control with a rich soap and
water solution to test for leaks before operating main
burner. Bubbles indicate gas leak. To stop leak, tighten
pipe connections. After piping connections are checked,
turn on main burner.
Instructions in this manual or on water heater.) With main
burner in operation, paint pipe joints (including flanges),
and control inlet and outlet with rich soap and water
solution. Bubbles indicate gas leak. To stop leak, tighten
The dirt
(See Lighting and Operating
FIGURE 3
flange screws, joints and pipe connections. Replace part
if leak can't be stopped.
DISCONNECT THE APPLIANCE AND ITS INDIVIDUAL SHUT OFF
VALVE FROM THE GAS SUPPLY PIPING SYSTEM DURING ANY
SUPPLY PRESSURE TESTING EXCEEDING 1/2 PSI (3.5 kPa).
GAS SUPPLY LINE MUST BE CAPPED WHEN DISCONNECTED
FROM THE HEATER. FOR TEST PRESSURES AT 1/2 PSI (3.5
kPa) OR LESS, THE APPLIANCE NEED NOT BE
DISCONNECTED, BUT MUST BE ISOLATED FROM THE SUPPLY
PRESSURE TEST BY CLOSING THE MAIN MANUAL GAS VALVE.
BEFORE PLACING THE HEATER IN OPERATION, CHECK
FOR GAS LEAKAGE. USE SOAP AND WATER SOLUTION
OR OTHER MATERIAL ACCEPTABLE FOR THIS PURPOSE.
DO NOT USE MATCHES CANDLES, FLAME OR OTHER
SOURCES OF IGNITION TO LOCATE GAS LEAKS.
A NEW TEMPERATURE AND PRESSURE RELIEF VALVE
COMPLYING WITH THE STANDARD FOR RELIEF VALVES AND
AUTOMATIC GAS SHUT OFF DEVICES FOR HOT WATER
SUPPLY SYSTEMS, ANSI Z21.22 (CURRENT EDITION) MUST
BE INSTALLED IN THE HEATER IN THE MARKED OPENING
PROVIDED. THE VALVE MUST BE OF A SIZE (INPUT RATING)
THAT WILL BE ADEQUATE FOR YOUR SIZE HEATER.
Check the metal tag on the relief valve and compare it to the heater's
rating plate. The pressure rating of relief valve must not exceed the
working pressure shown on the rating plate of the heater. In addition
the hourly Btu rated temperature steam discharge capacity of the
relief valve shall not be less than the input rating of the heater.
VALVE IS TO BE PLACED BETWEEN THE RELIEF VALVE AND
TANK. DO NOT PLUG THE RELIEF VALVE.
7

RELIEF VALVE

NO