Middleby Cooking Systems Group PS870 Series Benutzerhandbuch

13

Certain safety code requirements exist for the installation of
gas ovens; refer to the beginning of Section 2 for a list of the
installation standards. In addition, because a the oven is
equipped with casters, the gas line connection shall be made
with a connector that complies with the Standard for Connec-
tors for Movable Gas Appliances, ANSI Z21.69 (in U.S.A.), as
well as a quick-disconnect device that complies with the
Standard for Quick-Disconnect Devices for Use With Gas Fuel,
ANSI Z21.41 (in U.S.A.).

Four items have to be changed, to change the oven to LP:

1.

Adjust  internal  burner  air  shutters.

2.

Replace  main  Orifices

3.

Replace (and adjust) the spring in the main valve (see LP kit)

4.

Adjust  modulating  valve  bypass  settings.

Disconnect  the  manifold  unions  closest  to  the  main  burner,
and  remove  the  manifold  assemblies  (four  screws  each).
Remove the addition four screws holding the burner cores and
slide  out  each  burner  core  (leaving  the  ignition  and  sense
wires  connected).  Adjust  the  internal  air  shutters  fully  open,
and replace the cores.

Replace the main orifices on the manifold assemblies with the
LP units, and replace the manifold assemblies. Reconnect the
unions. Replace the valve spring with the LP spring, and adjust
the downstream pressure to get 7

″ WC.

Adjust the bypass screws in the side of each modulating valve
to approximately 1/6 turn from fully closed. If this setting is too low,
the burners will shut off when trying to modulate. If it is too open,
the unit will tend to gradually raise up in temperature at standby.

Gas Burner

Burner/Blower Motor