2. Make three separate runs of conduit as discussed in Section 3.1, paragraph 4 above. Hole-outs have been excluded to let your installing electrician choose where to come into the boxes. The electrical terminal strips require one conduit run for the higher voltage motors and a second run for the lower voltage control circuit wiring. The thermocouple terminal strips require their own conduit run. The control voltage is 120 V AC/1 /60Hz. The thermocouple wires should be “J - type” (two -conductor or four-conductor). These require a wire to be run from the remote control panel to the main control panel. The polarity of the thermocouples should be matched (white – positive and red – negative). A qualified electrician should size the wiring and conduit accordingly.
4.
Connecting Utilities
Installation of the oven requires the connection of utilities. All ovens require electric service for powering the motors and controlling the oven. All gas ovens require the connection of gas service. Almost all ovens require the connection of an exhaust stack. Ovens with a dry chemical fire suppression system require that the end user contact a local fire control specialist for fire control system activation.
4.1 Electric Service
An electric disconnect for the oven has been attached to the control panel. The service line supplying the power to the oven should also be equipped with a disconnecting device with interrupting capability to clear the maximum fault current capacity of the immediate power supply system. A qualified electrician should attach the appropriate power to the disconnect.
1. All electrical installations should be in accordance with the National Electric Code.
2.
Connect a ground wire from the grounding lug to a known ground.
3. Connect the appropriate electric service to the disconnect on the control panel. The wire should be sized per the amperage rating of the circuit breaker and the National Electric Code.
4.
Control voltage provisions are not necessary. They have been addressed by a factory-mounted transformer located inside the control panel.
4.2
Gas Service
In order to operate properly, the oven requires a specific inlet gas pressure. Col-Met Spray Booths, Inc. ovens are designed to operate on a gas supply pressure of 5 PSI. Do not exceed this gas pressure. An additional positive shut-off regulator located prior to the oven gas train is typically required to provide the appropriate gas pressure. A qualified mechanical contractor should be able to size the gas lines and regulators accordingly. See the following note if you will be using propane gas:
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