Garland THE MASTER GAS CONVECTION OVEN - Manuel (Page 7)

Part # 1955200 Rev.6 07/03/12) Page 7
Gas Connection
The 1" NPT inlet at the rear must be considered in piping the
gas supply for double stack units or ¾" NPT for individual (or
single deck) connections. Undersized gas supply line(s) may
restrict the gas supply and affect performance. If other gas
appliances are supplied by the same supply line, the supply
line must be sized to carry the combined volume without
causing more than 1/2" pressure drop at the manifold of each
appliance on the line at full rate.
Recommended supply pressures are 7" WC, (NAT), and
11" WC, (PRO); ± 5%. (Must not exceed 13.8" WC [NAT], and
15" WC [PRO]).
Electrical Connection
A 15 AMP service must be provided for each oven. For 115
VAC usage, a cord and plug (NEMA #5-15P) is provided but
connection to the electrical service must be electrically
grounded in accordance with local codes, or in the absence of
local codes, with the National Electrical Code, ANSI/NFPA 70,
or the Canadian Electrical Code, CSA C22.2, as applicable.
This appliance is equipped with a three-prong (grounding)
plug for your protection against shock hazard and should
be plugged directly into a properly grounded three-prong
receptacle.
DO NOT CUT OR REMOVE THE
GROUNDING PRONG FROM THIS PLUG.
A wire diagram is affixed to the rear of the unit.
Ventilation & Air Supply
Proper ventilation is highly important for good operation.
There are only two choices for properly venting an oven: 1)
canopy hood style or 2) direct venting. The ideal method
of venting a GAS Convection Oven is through the use of a
properly designed canopy, which should extend 6" (150 mm),
beyond all sides of the appliance and 6'6" (1950 mm) from the
floor.
A strong exhaust fan will create a vacuum in the room. For an
exhaust system vent to work properly, exhaust and make-up
air must be balanced properly. For proper air balance contact
your local H.V.A.C. contractor.
All gas burners and pilots need sufficient air to operate and
large objects should not be placed in front of this oven, which
would obstruct the airflow through the front. Installation Of A
Direct Flue
INSTALLATION Continued
When the installation of a canopy type exhaust hood is
impossible the oven may be direct vented. Before direct
venting check your local codes on ventilation, in the absence
of local codes, refer to the National Fuel Code NFPA 54, ANSI
Z223.1 (latest revision).
If the unit is to be connected directly to a direct flue, it is
necessary that draft diverter be installed to insure proper
ventilation.
DRAFT DIVERTER
Direct venting, should be positioned on the main top and
fastened with sheet metal screws provided.
NOTE: Each oven has been factory tested and adjusted prior
to shipment. It may be necessary to further adjust the oven
as part of a proper installation. Such adjustments are the
responsibility of the installer. Adjustments are not considered
defects in material and workmanship, and they are not
covered under the original equipment warranty.
DO NOT UNDER SIZE VENT PIPE!
This can cause resistance to flow and impede good venting.
We suggest that if a horizontal run must be used it should
rise no less than 1/4" (6.25mm) for each linear foot of run, and
after a total of 180° of bends you should increase the size of
stove pipe by two (2") inches. The flue should rise 2' (60cm) to
3' (90cm) above the roofline or 2' (60cm) to 3' (90cm) above
any portion of a building within a horizontal distance of 10
(3 meters) feet.
The following diagram is only one example from the National
Fuel Gas Code Book NFPA 54, ANSI Z223.1, 7.5.3: