Drolet HeatPack DF00500 Installation And Operating Instructions Manual page 37

HeatPack Furnace Installation and Operation Manual
Example of thermostat wiring:
Connect one wire to "RH" and the other wire to "W". The red jumper can be left in place.
For more information, refer to the manufacturer's instructions.
Thermostat wiring – Parallel Installation
This furnace may be installed in parallel as an add-on to an existing furnace in the USA
only. Such an installation requires that the furnace's controls be interlocked to prevent both
furnaces from heating simultaneously.
You have two ways to connect the existing thermostat to your device:
Step 1. From the terminal of the existing furnace, connect 2 new wires (H) to the existing
wire (G) and fix them to the terminal on the circuit board labeled "I" (interlock) of the Add-
On furnace.
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