Honeywell D1-528 Direct Thermostat Installation Guide
INNCOM DIRECT D1-528 THERMOSTAT INSTALLATION GUIDE
1. Loosen the two screws from the base of the
D1-528 thermostat but don't remove them.
box. Plug the 6-pin low voltage harness onto the D1-
528 thermostat low voltage comm. / device connec-
tion header.
2. Use wire nuts to connect the 10-pin wiring harness to
the power and valve/fan control signal wires within
the electrical box.
3. Plug the pre-wired 10-pin connector into the female
receptacle at the back of the D1-528 thermostat.
2. Pull the bottom of the back-mounting plate slightly
away from the Thermostat housing, then pull the
Thermostat housing.
Pull Up
2
4. Hook the tabs at the top rear of the D1-528
thermostat housing into the matching depressions at
the top of the mounting plate and gently push the
bottom of the housing toward the mounting plate
until it fits properly.
Thermostat Housing
Mounting Plate
1
1
3. Feed wires through the insulator to minimize airflow
Thermostat Housing
4. Attach the back mounting plate to the mounting box
using the mounting screws provided. Ensure that the
plate is mounted with the raised arrow pointing UP.
Mounting Plate
Mounting Box
Back Mounting Plate
2
Screw
5. Secure the housing to the mounting plate with the
two small screws removed in Step 1 of the Mounting
section.
Back Plate
Insulator
Wiring Connections
The steps below provide an overview of the wiring
process. Refer to the as-built wiring diagrams provided
for exact details.
1. If applicable, use wire nuts to connect the 6-pin low-
voltage harness wires to the applicable low-voltage
communication (if D1-528 thermostat is part of a
wired RS485 centrally controlled system), door/win-
dow switch, or external PIR wiring within the electrical
6. Apply power to the D1-528 thermostat by closing the
applicable supply breaker. Verify that the D1-528
thermostat powers up. Several values should begin
appearing on the LCD display.
31-00721-01
8
| General | Details |
|---|---|
| Name | Honeywell D1-528 Direct Thermostat Installation Guide |
| Make | Honeywell |
| Language | English |
| Filetype | PDF (Download) |
| File size | 1.63 MB |
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