Convotherm OGB-10.10 Installation And Maintenance Instructions Manual page 23

COMBI
GAS MANIFOLD
CONNECTION
c. Test Gas Supply Lines
1). Leak Test Gas Supply
a) Before turning on gas to the Combi or after any service to gas supply:
(1) Test all pipe joints for leaks with soap and water solution.
(2) All leaks must be corrected before attempting to operate the Combi.
2). Pressure Testing the Gas Supply Lines
If any pressure testing is required; the Combi must be isolated from the gas supply
system during any pressure testing as follows:
a) HIGH PRESSURE TESTING: The Combi and its main manual shut-off valve
must be disconnected from the gas supply piping system during any pressure
testing of that system at test pressures in excess of 14" Water Column (1/2 psi or
3.45kPa). Leak test all joints and fittings with a soap and water solution after
reconnecting gas supply
b) LOW PRESSURE TESTING: The COMBI must be isolated from the gas supply
piping system by closing its main manual shut-off valve during any pressure
testing of the gas supply piping system at test pressures equal to or less than 14"
water column (1/2 psi or 3.45kPa). Leak test all joints and fittings with a soap and
water solution after opening the main manual shut-off valve.
Figure 2-13
Gas Supply Line Layout
MAIN MANUAL
PRESSURE REGULATING
SHUT OFF
VALVE (IF REQUIRED)
GAS VALVE
DRIP LEG
17
MAIN GAS
SUPPLY