Robertshaw 9200H, 9200V, 9204H, 9204V, 300-204 Technical Application Guide

TECHNICAL APPLICATION

Programmable and non-programmable thermostats with
solid state equipment outputs require a minimum of 80
mΑ ac (0.08A) of current draw to ensure switching
integrity.

The 300 Ω 5 watt resistor (supplied) should be installed
on the equipment terminal strip in accordance with the
drawing below to increase the current draw of the
primary control to 80 mΑ or greater. This connection
should eliminate any incompatibility problems between
the thermostat and the system.

INSTALLING THE RESISTOR

1. Read the instructions carefully. Failure to do so may
damage the product or cause a hazardous condition.

2. Check the rating on the resistor to make sure the
size (rating) is correct.

3. The installer must be a qualified service technician.

4. Connect the resistor leads to the equipment termi­nal strip across the W, Y or G (as required) and
24VAC Common terminals. Avoid contact with any
other terminals or components within the equip­ment.
Connect either end of the resistor to the terminals
(non-polarized) and firmly tighten the screw terminals.

WARNING!

The resistor will become warm during equipment
operation. This is normal.

110-856