B&C Technologies DE Series Commercial - Manual (Page 17)

Figure 3.6: Gas/Steam Heat Electrical Requirements
Figure 3.7: Electric Heat Electrical Requirements
3.2 Electrical Installation
Electrical connections should be made by a qualified electrician in accordance with all applicable
codes or requirements. Use a separate branch circuit to power each machine. Do not share circuits
with lighting or any other equipment.
A shielded liquid tight or approved flexible conduit with proper conductor of correct size installed
in accordance with National Electric Code (USA) or other applicable codes is required. The connec-
tion must be made by a qualified electrician using the wiring diagram provided with the machine.
For personal safety and for proper operation, the machine must be grounded in accordance with
state and local codes and in the USA in accordance with the National Electric Code, article 250-96.
The ground connection must be to a proven earth ground, not to conduit or water pipes.
Do not connect the ground to the neutral (N) leg at the terminal strip (if so equipped).
If a DELTA supply system is used, the high leg should be connected to L3, since control voltage is
derived from L1 and L2.
Insure that the control transformer taps are connected in accordance with the incoming line volt-
age. Verify connections as shown on the schematic with each machine.
Note:
Ensure that all power connections are tight. Loose connections will
cause burned wires and contactors on electrically heated machines.
Check the electrical connections at the incoming power terminal block,
contactors, and heating elements at installation, after the first week of
operation, and quarterly thereafter. Failure of switchgear due to negli-
gence in this area is not covered under any warranty!
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