Intertec Data Systems EFD145DLFR000 Series - Communicating Furnace: 24 V Mode Electrical Connections

Pub. No. 18-HE122D1-1-EN Numbers in [brackets] are for 50 Hz international systems. 13
Installer’s Guide
ELECTRICAL CONNECTIONS TO A COMMUNICATING FURNACE IN 24 V MODE
ss
WARNING
!
HAZARDOUS VOLTAGE! DISCONNECT ALL ELECTRIC
POWER, INCLUDING REMOTE DISCONNECTS BEFORE
SERVICING. FOLLOW PROPER LOCKOUT/TAGOUT
PROCEDURES TO ENSURE THE POWER CAN NOT
BE INADVERTENTLY ENERGIZED. FAILURE TO
DISCONNECT POWER BEFORE SERVICING COULD
RESULT IN DEATH OR SERIOUS INJURY.
PROCEDURE:
1. Remove electrical power going into the furnace.
2. Removeblowerdoortoup-owordown-owfurnace.
3. Remove the two screws that secure the IFC platform to the under-
sideoftheblowerdeckonanup-owfurnaceorthe3screwsthat
securetheIFCplatformtothetoppanelonadown-owfurnace.
4. Carefully remove the IFC platform from the furnace.
5. Onboththeup-owanddown-owfurnaces,mountthe50VA
transformer supplied in the packaging with the air cleaner onto the
bottom of the IFC platform. Screws and pilot holes are provided.
Seegure.
6. Removewiringfromexisting35VAtransformerandreconnecttothe
50VAtransformer.Notethepolarityofthewiresandreconnectto
the appropriate terminals. See diagram
7. RemovetheEAC-H115VACandEAC-Nwires(whiteandblack)
out of the junction box and pull them through the grommet in the
blowerdeck.Attachtwosupplied¼”insulatedfemalequickconnect
terminals by stripping the wires and crimping the terminals onto
thewires.Attachthesewirestothe115Vterminalsofthe35VA
transformer as shown in the diagram.
8. Remove the wiring harness supplied with the air cleaner from the
packaging.Attachasupplied3/16”insulatedfemalequickconnect
terminal to the blue wire and the green wire.
9. Attachthebluewirefromtheaircleanerwiringharnesstotheopen
tabonthepiggybackterminalsuppliedintheBAYACCECOMM101.
Attachpiggybackterminaltothe35VAtransformerterminal“C”
(Common).
10. Insertthe12”bluestrippedwireundertheterminalstripscrew
marked“B/C”ontheIFCcontrolboard.Iftheapplicationalsoin-
cludesanoutdoorunit(communicatingornon-communicating),the
B/Cterminalwillrequire3wiresconnected.Forthisconnection,
rather than connecting the three wires to the low voltage terminal
striponthefurnaceIFC,createapigtailusingashortlengthof
thermostatwireandawirenut(eldsupplied)toattachtotheB/C
terminal.
11. Connect the green wire from the air cleaner wiring harness to the
24Vterminalonthe35VAtransformerlabeled“RD”.Seediagram.
12. Insert the red stripped wire from the air cleaner wiring harness un-
dertheIFCcontrolboardterminalscrewmarked“R”.Seediagram.
13. Attachtheblackstrippedwirefromtheaircleanerwiringharness
directly to ground with a screw on the furnace chassis. See dia-
gram.
14. Oncealloftheconnectionshavebeencompleted,remounttheIFC
control platform into the furnace.
15. Secure any loose wiring with wire ties.
16. ThebrownandwhitewiresfromtheEACwiringharnessare
unused in this application and should be insulated. See diagram.
17. Replace the furnace door.
18. Reconnect electrical power to the furnace.
19. Check both furnace and air cleaner operation per the furnace and
air cleaner installer guides.
BILL OF MATERIALS:
QTY:2 Screw
QTY:1 4"InsulatedCopperWire–
 Blue(18AWG,AWM)
QTY:2 1/4”InsulatedFemaleQuick
Connect Terminal
QTY:2 3/16"x0.020"InsulatedFemale
Quick Connect Terminal
QTY:1 3/16"x0.020"Receptacle&Tab
These instructions and listed parts are included in KIT# BAYACCECOMM101