2017_E_TYPE-HL.doc Page 18 of 55 24-Oct-2017
These require 208/220V-25A-3 phase/4 wire-60 Hz power supply.
Other supply voltages are available on request (e.g. 240V, 460V)
Note: Required amperages in 3.3.2 and 3.3.3 could vary.
Wiring to the oven should be a dedicated line. Low supply voltages will affect control
system performance and may damage the controls.
3.4 Fuel Supply
Guspro ovens include complete manifold on the oven for single point fuel connection
with either Natural Gas or Liquefied Propane Gas (LPG). Oil fired units are also available.
Individual requirements for ovens burning these fuels are discussed below.
3.4.1 Natural Gas Service
Standard natural gas service is 0.25 psi or 7" water column pressure (WC) at the
pressure gauge. This gas pressure must be maintained with all burners operating at
maximum BTU output.
The oven is designed for this service with a normal pressure drop in the line to the oven
of up to 1/2" WC. The rated capacity on the burners is at the manifold pressure indicated on the
burner information plates.
If service is over 0.50 PSI or 14" water column, the purchaser must install a separate
supply regulator at the oven. The purchaser’s gas service should include a manual shut off valve
and a pressure regulator at utility connection point to the oven. The shut-off valve should be
installed close to the connection point.
The local gas company should be contacted to check the installation plan, piping size and
the regulator capacity to provide the correct gas supply. Dirt and scale must be blown out of gas
line before the final connection is established. Once the gas supply is connected, the system
should be checked for leaks.
Pipeline sizing should be obtained through the local natural gas supplier. Licensed gas
installers are another reliable source. Pipe sizing is important as an undersized pipe results in a
pressure drop. This in turn reduces the gas flow across the regulators and impedes burner BTU
values.
Note: The local gas company should be contacted for confirmation of facility requirements
and verification of meter size.
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