Schwank ATH Brooder/Agricultural Series - Manual (Page 16)

GP-MATH-BX-10A
ATH / IA Manual
RD: Nov, 2005
RL: 10
KH
Page 12
DO NOT use pressures greater than 1/2 psig. to pressure check the heater.
TEST FOR LEAKS: All gas piping and connections must be tested for leaks after the installa-
tion is completed.
Apply soap suds solution to all connections and joints and if bubbles appear, leaks have been
detected and must be corrected. DO NOT USE A MATCH OR OPEN FLAME OF ANY
KIND TO TEST FOR LEAKS. NEVER OPERATE THE HEATER WITH LEAKING
CONNECTIONS.
The supply system should be checked first with heater turned "OFF" followed by another
check with heater turned "ON".
IMPORTANT:
The minimum supply-line pressure at the inlet to the heater regulator must not, in any in-
stance, be lower than 5.0 inches of water column pressure for natural gas and 11.0 inches of
water column pressure for propane gas. The supply line pressure must be checked with all
the heater(s) operating. A sealed regulator is supplied with the heater to maintain the proper
manifold pressure when the main burner is operating.
TABLE 5
GAS TYPE
LINE PRESSURE
INCH WATER COLUMN
MINIMUM MAXIMUM
Natural Gas 5.0 14.0 3.5
MANIFOLD PRESSURE
INCH WATER COLUMN
AT-TAP IN GAS VALVE
Propane 11.0 14.0 10.0
NOTE: Access to the manifold pressure test port is on the top of the valve. A 3/16" Allen
Wrench is necessary to check this. When checking or setting the manifold pressure, a
water manometer should be used. Gauges which measure in ounces per square
inch or pounds per square inch are not accurate enough to properly measure or set the
pressure. PLEASE SEE NEXT SECTION ON HEATER EXPANSION.