©2015 Hestan Commercial Division
6
Gas Supply
The local gas authority should be consulted at the installation planning stage in order to establish the availability
of an adequate supply of gas and to ensure that the meter is adequate for the required flow rate. The pipe work
from the meter to the appliance must be an appropriate size.
All fixed (non-mobile) appliances must be fitted with an accessible upstream gas shutoff valve as a means of
isolating the appliance for emergency shut off and for servicing. A union or similar means of disconnection must
be provided between the gas-cock and the appliance.
A manually operable valve must be fitted to the gas supply to the kitchen to enable it to be isolated in an
emergency. Wherever practical, this shall be located either outside the kitchen or near an exit in a readily
accessible position.
Where it is not practical to do this, an automatic isolation valve system should be fitted which can be operated
from a readily accessible position near the exit.
In locations where the manual isolation valve is fitted or the automatic system can be reset this notice must be
posted:
“ALL DOWNSTREAM BURNER AND PILOT VALVES MUST BE TURNED OFF PRIOR TO
ATTEMPTING TO RESTORE THE SUPPLY. AFTER EXTENDED SHUT OFF, PURGE
BEFORE RESTORING GAS”
NOTE:
Before assembly and connection, check gas supply.
Gas Supply Notes
1)
The type of gas for which the unit is equipped is stamped on the rating plate, see locations on page 9.
Connect a unit stamped “NAT” only to natural gas and stamped “LP” only to propane gas.
2)
If it is a new installation, have the gas authorities check the meter size and piping to assure that the unit
is supplied with the necessary amount of gas supply and pressure to operate the unit(s).
3)
Make certain new piping and connections have been made in a clean manner and have been purged so
that piping compound, chips, etc. will not clog pilots, valves, gas regulator, or burners. Use pipe joint
compound approved for natural and liquefied petroleum gases.
4)
The natural gas pressure coming into the regulator should be 7” WC or .25 psig (1.75kpa) and 5” WC
.18 psig (1.25kpa) coming out of the regulator. For liquid propane gas pressure coming into the
regulator should be 11” WC or .4 psig (2.75kpa) and 10” WC .36 psig (2.5kpa) coming out of the
regulator.