Manual

6. Electric Heat Installation
General Information
Adjusting Thermostat Anticipator
Set the heat anticipator of the thermostat to the proper value. See
instructions provided with the thermostat before making this ad-
justment.
Model Number Anticipator Setting
AMMH10AHB .36
AMMH15AHB .36
Limit Controls
The limit controls are mounted on the face of the heater and are
wired into the supply wires to each element. If there is not enough
air flowthrough the heater, the limit will open and break the power
circuit. The limit will reset when the electric accessory cools
down.
Operation
The heater elements are switched ON and OFF through a contac-
tor which operates through the low voltage thermostat circuit.
Install Heater
1. Shut OFF electric power at unit disconnect switch or service
panel.
2. Remove the blower access panel from unit,
NOTE: Installation of field wiring and conduit for heaters
to the unit prior to installing the heater will simplify wir-
ing of heaters.
3. From inside the blower compartment, remove the six screws
on the heater cover plate and save the screws. Discard the
heater cover plate.
The screws will be used later to mount the electric heat ac-
cessory and its cover.
4. Remove the cardboard wrapper from the heater's elements.
5. Insert the heater into the heater/blower box. Exercise cau-
tion to prevent damage to heater elements.
6. Secure heater to heater/blower box with four of the six
screws removed in Step 3.
FIGURE 8 Electric Heat Accessory
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FIGURE 9 I Installing The Electric Heat Accessory
Heater Wiring
Grounding
Permanently ground the electric heat accessory in accordance
with local codes and ordinances and in the United States with Na-
tional Electrical Code ANSl/NFPA70-1990 or current edition.
Use a copper conductor of the appropriate size from the electric
heat accessory to the ground lug on the top of the heater as
shown in NO TAG.
Installing Wiring
When an electric heat accessory is installed, two separate field
power supplies MUST be provided - one for the electric heat ac-
cessory and one for the unit.
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