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Rev. E 4-15-05 P/N 472235
19
You need to open the right
door then remove the
control panel cover for
servicing the Line Terminal
Block as shown in Figures
16 & 17, (see item 40 in the
exploded view on page 33).
ELECTRICAL CONNECTIONS
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 heater is prewired for 240-volt AC connection using the “RED” connector and the “BEIGE” common connector;
see Figure 16 below. For 120-volt AC supply, remove the “BEIGE” common connector and plug it into the “BLUE” common
connector.
• 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.
LINE TERMINAL BLOCK
L
N
GREEN WIRE
WHITE WIRE
BLACK WIRE
GROUND
CONNECTION
NEUTRAL / WHITE 120 VAC
LINE #1 FOR 240 VAC
HOT / BLACK 120 VAC
LINE #2 FOR 240 VAC
INTERNAL
FACTORY WIRES
Figure 16.
Figure 17.
Section III. Installation
RED
240V CONNECTOR
BEIGE
COMMON CONNECTOR
BLUE
120V CONNECTOR
TRANSFORMER
CONNECTOR
TERMINAL BLOCK
FOR AC INPUT
120 / 240 VOLT SINGLE
PHASE "See Below"