Honeywell TC500A Mounting Instructions page 3

WARNING
Ensure that all Thermostat power, communications, and
I/O cabling are connected to C or COM according to
these instructions. Failure to follow these instructions
may result in Thermostat operational and
communication failures or equipment damage.
Detaching the wallplate from the
display
The thermostat is an assembly of a wallplate and a display.
It must be disassembled before starting the mounting
procedure.
1. At bottom of the thermostat, loosen the Security
screw using a screwdriver by turning it counter-
clockwise direction.
2. Hold the display unit and pull the paper tail.
Paper tail
Wallplate
Security
screw
Display unit
Fig. 3. Detaching the wallplate
Mounting wallplate on the drywall
Mount the wallplate vertically on the wall. It supports 18-
22 AWG (0.5-0.75mm2) wires.
NOTE: If you are using a TC500A Deco plate for thermo-
stat mounting, refer to the Deco plate pocket
guide (31-00457M) also.
1. Before mounting the wallplate, make sure that the
thermostat wires are stripped to the length marked
on the wallplate.
Fig. 4. Wire strip length
TC500A-N/TC500A-W COMMERCIAL THERMOSTAT
2. Position and level the wallplate along the wall and
mark the drilling location using a pencil.
4 x 11/32"
(9mm)
4 x 3/16"
(4.5mm)
2 - 3/8"
(60.3mm)
(UK 75X75cm
junction box
screw holes)
Drilling location for wall mounting
Fig. 5. Wallplate drilling locations
3. Remove the wallplate and drill two pilot holes on the
wall, on the marks. For drywall, drill 3/16-in. holes.
For firmer material such as plaster, drill 7/32-in.
holes.
4. Gently tap anchors (provided in the kit) into the pilot
holes until flush with the wall.
5. Pull the wires through the wiring opening of the wall-
plate and position the wallplate over the mounting
holes.
6. Insert the screws into the holes and tighten (screw
torque 0.1Nm).
Mounting the wallplate on the
junction box (optional)
The thermostat wallplate can be mounted vertically on a
US 2"*4" or UK 75*75mm junction box.
NOTE: If you are using other than US 2"*4" or UK
75*75mm junction boxes, then a TC500A Deco
plate can be used for thermostat mounting. Refer
to the Deco plate pocket guide (31-00457M).
1. Install the junction box and perform the wiring as per
its manufacturer's instruction.
2. Before mounting the wallplate, make sure that the
thermostat wires are stripped to the length marked
on the wallplate.
3. Pull the wires through the wiring opening of the wall-
plate, and position the wallplate along the junction
box to align the mounting holes. For junction box
screw holes, refer to Fig. 5.
4. Insert the screws into the holes and tighten.
3
Drilling location for
wall mounting
3 - 1/4"
(82.75mm)
(US 2"X4" junction
box screw holes)
31-00399M-02 | Rev.03-21