Section III. Installation | 19 | ||
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| ELECTRICAL CONNECTIONS | ||
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| Electrical Rating 60 Hz | 120 / 240 Volts AC, single phase | |
CAUTION
This heater is designed to operate at 120 or 240 VAC. It is not recommended to be connected to OR operate on a 208 VAC.
NOTE
•The MiniMax NT LN heater is prewired for
•When connecting the power supply to the “Line Terminal Block” inside the junction box, follow the polarity as shown below. Connecting to 120 VAC, make sure that you connect the wire to the terminal (L), the neutral wire is connected to the neutral terminal (N) and the ground is connected to the ground terminal (GND); see below, Figure 17.
•If any of the original wiring supplied with this heater must be replaced, installer must supply (No. 18 AWG, 600V, 105° C. U.L. approved AWM low energy stranded) copper wire or it’s equivalent. Thermal fuse wiring must be replaced with 18 AWG, 600V, 150° C. temp. rating.
CAUTION
The installation must conform with local codes or, in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or CSA B149.1, Natural Gas and Propane Installation Codes. If an external electrical source is utilized, the heater, when installed, must be electrically grounded and bonded in accordance with local codes or, in the absence of local codes, in the USA, with the National Electrical Code, ANSI/NFPA 7; in Canada, with Canadian Electric Code, CSA C22.1.
Always use crimp type connectors when connecting two wires.
| TRANSFORMER |
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| CONNECTOR |
| BLUE |
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| 120V CONNECTOR |
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| BEIGE |
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| COMMON CONNECTOR |
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| TERMINAL BLOCK |
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| FOR AC INPUT |
| You need to open the right | ||
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| 120 / 240 VOLT SINGLE |
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| RED |
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| PHASE "See Below" |
| door then remove the | |||||||||||||
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| 240V CONNECTOR |
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Figure 16. |
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| control panel cover for | ||||||||||||||
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| servicing the Line Terminal |
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| LINE TERMINAL BLOCK |
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| Block as shown in Figures | ||||||||||
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| 16 & 17, (see item 40 in the | |||||||||||
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| exploded view on page 33). |
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| GROUND |
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| GREEN WIRE |
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| CONNECTION |
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INTERNAL FACTORY WIRES
WHITE WIRE
BLACK WIRE
N
L 
NEUTRAL / WHITE 120 VAC LINE #1 FOR 240 VAC
HOT / BLACK 120 VAC
LINE #2 FOR 240 VAC
Figure 17.
Rev. E | P/N 472089 |