Midco EC200 & EC300 - Manual (Page 5)

Midco International Inc.
5
8471 38
Part 1 Installation
metal screws or other approved fi ttings. The Vent Connector shall be supported for the design and
weight of the material employed to maintain clearance and prevent physical damage and separation
of joints.
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A draft hood or barometric draft regulator shall be installed in the same room as the equipment
in such a manner as to prevent any difference in the pressure between the hood or regulator and
the combustion air supply. In no case shall the relief opening of the draft hood or barometric draft
regulator be located at a point lower than the top of the highest fl ue passage in the equipment.
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CAUTION: Do not add any power consuming devices in the low voltage circuit to
prevent overloading of the transformer.
Note: If any of the original wiring as supplied with the conversion burner must be replaced, it must
be replaced with type TFF wire or equivalent. Installation wiring and grounding of the burner must
conform to local codes, or in their absence in the United States to National Electric Code, ANSI/
NFPA No. 70-latest edition; in Canada, to Canadian Electrical Code Part 1, CSA Standard
C22.1.
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Electrical installation must be made in accordance with the United States National Electric
Code, ANSI/NFPA No.70-latest edition or Canadian Electrical Code, Part 1, CSA Standard C22.1
and applicable local code. If the burner is a part of a gas utilization equipment system, check the
wiring diagram as supplied by the manufacturer.
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Refer to the wiring diagram Figure 5 or the same wiring diagram supplied on the inside of the
burner wiring enclosure. There are three leads (black - L1, white - L2 and green - ground) and two
thermostat wire leads (blue) inside the wiring enclosure.
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Use 14 gauge copper wire for line voltage wiring. Be sure to connect to a permanent live circuit.
Provide a fused on-off disconnect switch carrying a minimum 3 amp fuse.
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The frame of the burner must be well grounded. A terminal is provided in the control box for
grounding.
- Confi rm that the polarity is correct; L1 to black wire, neutral to white. The neutral line should
not be subjected to induced low voltage (check white and green wire to earth ground) from other
equipment as that can cause the electronic fl ame safeguard to malfunction.
-
Each installation must include suitable limit controls. The existing oil burner combination limit
and operating controls are NOT SUITABLE for gas burner safety and operation.
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Set the thermostat heat anticipator to the current draw of the gas burner. The current draw of
the gas burner 24V operating circuit is 0.7 amps.
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring
errors can cause improper and dangerous operation. Verify proper operation after servicing.
___________________________
V - Electrical
IV - Chimney, Vent
Connector, and Draft
Control
Continued
EC 200/300 115V Wiring Diagram
Note: If any of the original wire as
supplied with the burner must be
replaced, it must be replaced
with a type T FF or its equivalent
EC 200/300 240V Wiring Diagram
LEGEND
Solid: Wiring and components by factory
Dashed: Wiring and components by installer
Component
Wire nut
5236-34 5236-40
Figure 5: Wiring Diagram