MN-35947
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Rev 15
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01/18
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Combitherm® CT PROformance™ and CT Classic Series Installation Manual
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49
Installation
The minimum size requirement for gas piping or a
flexible connector is 3/4 – inch (19mm). For long runs of
gas piping, the pipe diameter must conform to the tables
in the National Fuel Gas Code, ANSI/NFPA Z223.1 or
European Standard EN203.
A listed gas shut-off valve must be installed upstream of
the appliance to shut off the gas supply during servicing.
The shut-off valve should be accessible with the
appliance in the normal installation position.
If the oven or the oven stand is supplied with casters, gas
connection must be made with a flexible connector that
complies with the Standard for Connectors for Movable
Gas Appliances, ANSI Z21.69; or in Canada, Connectors
for Movable Gas Appliances, CAN/CGA-6.16-M87.
When using a flexible connector, a quick disconnect
device must be used to comply with the Standard for
Quick-disconnect devices for Gas Fuels, ANSI Z21.41;
or in Canada, Quick disconnect devices for Use with
Gas Fuels, CAN1-6.9 or European Standard EN203. In
Australlia / New Zealand AS 5601, AS 1869.
When a quick disconnect device and flexible connector
are used, a restraining device must be installed to limit
the movement of the appliance and prevent damage
to the connector or quick disconnect. An example of a
restraining device would consist of a 2000 pound test,
stainless steel cable, attached to a structural member
of the kitchen wall behind the oven. The means of
attachment should consist of a quick connect snap so
that the oven can be disconnected when the appliance
must be moved away from the wall.
The other end of the cable should be permanently
attached to the rear frame of the oven. The cable should
be of sufficient length so that no strain is ever placed
on the flexible gas connector in the event of accidental
movement of the oven without properly disconnecting
the gas connector. The flexible connector should be
routed to form a downward “U” loop between the
building gas supply and the permanent attachment at
the rear of the oven.
The routing of the flexible connector must not run along
the side of the exhaust stacks or cross the exhaust stacks.
Oven temperatures achieved during operation are too
hot for safe operation. Gas piping should be installed
from the point of gas connection at the back of the oven
and run away from the exhaust stacks where the flexible
connector may be safely used. See the illustration for the
area to avoid.
W A R N I N g
To prevent SERIOUS INJURY, DEATH, or
PROPERTY DAMAGE:
Always use proper length pipes to avoid
stress on the gas control manifold.
Always use an approved gas pipe sealant at
all external threaded connections.
Always remove any tape or compound
residue on all external thread connections
before installing appliance.
gAS SuppLY AND INSTALLATION
