Transformers should be mounted on or near a junction box.They can also be mounted to the electrical service panels. Junction boxes in utility rooms, crawl spaces, or basements are preferred. Avoid attic locations whenever possible.
To install a new transformer, TURN OFF HOUSE POWER, then mount either Heath®/Zenith 107C or 125C transformer to a convenient junction box or circuit breaker box. Follow instructions supplied with transformer.
To connect bell wire from chime to push button, cut it to required length, strip coat- ing 1/2", wrap exposed wire around chime terminals #1 and #2 and tighten screws (see Figure 3).
Replace cover and turn house power back on. Run bell wire to push button location and connect to push button. Follow instructions supplied with push button.
C. Replace Existing
R
TURN OFF HOUSE POWER. Label wires at the
REAR 
T
“old” chime as shown in Figure 4. Remove “old” chime. At the transformer remove the two or three
TRANS 
FRONT 
F
Figure 4 - “Old Chime”
F | R |
To Push Button
1 
2
3 | T |
Figure 5
low voltage wires from the output terminals, twist them together and secure them with a wire nut. Turn the house power back on. Mount the new
-marked on the base plate. Alkaline batteries offer longer life. Batteries are not included.
