ERM5220R EQUIPMENT REMOTE MODULE
33-00205—01 14
LINKING ERM5220R TO A NEW COMPATIBLE THERMOSTAT.
NOTE: If thermostat setup had already been done but ERM5220R had not been linked to the thermostat, see page 16.
1. Verify thermostat model and manufacture date are compatible with ERM (should say compatible with ERM on
packaging). Information about compatible models of thermostat and EIM is on page 3.
2. Turn on power. Once power is connected, the “Compressor” (or “Boiler”) LED should illuminate green.
3. When the thermostat is powered it will prompt you to select whether the system is residential or commercial. After
setting residential or commercial and choosing the thermostat name, the display shows the below screen (setup
110).
4. The ERM5220R does not work on a forced air system
zoned with dampers. Select “no” if the system is
either a single zone forced air unit, or a zoned hot
water system. A zoned hot water system would
require a separate ERM5220R for each wireless
thermostat).
NOTE: For questions about why the ERM cannot be used
on a forced air zone system, see the FAQ section.
5. Equip. module (EIM) THM5421R is separate from
remote module ERM. See notes below for when an
EIM is used.
•If not using
an Equipment Interface Module,
select “no” at the thermostat with arrow button,
then press “next”. Skip to step 10.
•If using
an Equipment Interface Module, select
“yes” at the thermostat with arrow button, then
press “next”. Proceed with step 6.
EQUIPMENT INTERFACE MODULE (EIM) THM5421R. WHEN IS IT USED?
• The Prestige IAQ always requires an EIM even if it is hot water heat only. For this reason it would be unusual to use the
ERM5220R with a Prestige IAQ on a hot water heat only application.
• The TH8110R, TH8320R, and TH8321R models do not require an EIM for hot water heat only applications with no fan
control.
• The TH8110R, TH8320R, and TH8321R models do not require an EIM if the furnace/air-handler is wired to the
thermostat subbase.
• The TH8110R, TH8320R, and TH8321R models do require an EIM if the thermostat controls cooling or fan, and there
are not wires from the thermostat to the furnace/air-handler.
6. Thermostat display says “Press Connect at Equipment Module”. Go to the Equipment Interface Module and press the
connect button.
7. Verify the connected LED starts flashing.
8. Go back to the thermostat and press “Next”.
9. Thermostat display should show “Thermostat connected”. Press “Next”.
10. Select “Yes” to connect RedLINK accessories
(Including ERM5220R Equipment Remote Module).
11. The thermostat display says “Press Connect on New
Accessories”.
MCR35659
CONNECTED LED STATUS
Connect
Flash
ing: Devic
e Connecting
Gree
n: Device Connected
Red:
Not Communicating
Compressor
Boiler
Connected
MCR35660
CONNECTED LED STATUS
Connect
Flashing: Devic
e Connecting
Green: Device Connected
Red: Not Communicating
Compressor
Boiler
Connected
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