33-00135EFS—05 2
About the ERM5220R
Fig. 1.
• Wireless RedLink™ communication between condensing unit/
compressor or boiler and thermostat.
• Eliminates the need to run additional wires to your equipment, for
example, during a heat pump upgrade.
• Suitable for outdoor use.
• Temperature sensor terminals for outdoor temp sensors or indoor
freeze protection.
• LEDs for easy installation checkout.
• May reduce damage to homes since wiring/drilling is eliminated.
NOTE: The ERM5220R must be used with updated
THX9421R5021, TH8321R1001 and/or EIM. Look
for this image on these products.
MCR35654
ERM
WIRE
CONDENSING
UNIT
THERMOSTAT
ERM
BOILER
33-00135EFS_C.book Page 2 Monday, May 2, 2016 1:52 PM
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