©2018 Hestan Commercial
6
HUCO Series
Connections
Oven Gas Requirement
Single oven requires one gas connection, Double oven requires two gas connections.
The gas supply (service) line must be the same size or greater than the inlet line of appliance. The HUCO series
ovens use a ¾” NPT inlet. Sealant on all pipe joints must be resistant to LP gas.
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.
Manual Shut-Off Valve
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.
Kitchen Shut-Off Valve
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 AIR BEFORE RESTORING GAS”
Gas Supply Notes
1)
The type of gas for which the unit is equipped is stamped on the rating plate; see Model / Serial / Rating
Plate Locations on page 8. 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(s)
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. All connections must be
sealed with a joint compound suitable for LP gas.
Flexible Coupling, Connectors and Casters
If the unit is to be installed with flexible couplings and /or quick-disconnect fittings, the installer must use an AGA
design-certified commercial flexible connector of at least ¾” NPT (with suitable strain relief). The flexible
connector must comply with the standard for
Connectors for Movable Gas Appliances, ANSI Z21.69
and
addendum
Z21.69a
(or latest edition), and a quick-disconnect device that complies with the standard for quick-
disconnect devices for use with Gas Fuel should comply with
ANSI Z21.41/CSA 6.9
and addendum
Z21.41a
(or
latest edition). If disconnection of the restraint is necessary, make sure to reconnect restraint after the appliance has
been returned to its originally installed position.
Domestic gas or water connectors are not suitable!
Restraining device may be attached to the back frame/panel of unit.
If the unit is to be installed with casters, a flexible connector
must
be used and the same ANSI standard applies.
Locking front casters are provided to limit the movement of the appliance without depending on the connector or
associated piping. A suitable strain relief must be installed with the flexible connector.
All connections must be sealed with a joint compound suitable for LP gas and all connections must be tested with a
soapy water solution before lighting pilots or attempting use.