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Figure 3: Low Voltage Harness Connection
Figure 4: Power Conduit And Wire Routing
(external mount)
Figure 2: Typical Horizontal Installation
Wiring and Setup
1. Install power wiring and connect to power block or
circuit breakers. For 12, 15 or 20 kW models, two
power circuits may be used to reduce wiring and
breaker costs as in Figure 5a. If a single circuit supply
is desired, install the optional single circuit accessory
kit (part number 16B0002N02), as shown in Figure
5b. Optional for WDG: HG**C kits only. Blower
power may be supplied from T3 and T4 CB5 breaker.
Refer to wiring diagram.
2. Check unit CFM to insure airflow setting is above
minimum airflow rating for the electric heat model
from Table 1. Low speed blower not allowed with
electric heat.
Field supplied disconnect.
Refer to local codes.
Electric Heat Assembl
y
Disconnect (optional)
refer to local code
Field supplied
disconnect.
Refer to local
codes.
Figure 4a: Power Conduit And Wire Routing
(internal mount)
3. Check heat staging for the application. Table 4
contained later in this IOM shows the factory default
staging and the alternate field selectable staging where
applicable. Staging changes are made by dip switch
settings. See figure 6. These are identified as either
ER1, ER2, ER3 or ER4 depending on the heater size.
4. Mark the appropriate box of the electric heat model
installed on the additional serial plate on the exterior
of the unit.
5. Turn on the power to the unit and the auxiliary
electric heat. Wiring installation is complete.
Field supplied
disconnect.
Refer to local
codes.
