Honeywell CVL4022ASVAV1 Engineering Manual page 16

IMPORTANT:
Power must be off prior to connecting to or removing
connections from the 24 Vac power (24 Vac/24 Vac COM),
earth ground (EGND), and 20 Vdc power (20 Vdc) terminals.
IMPORTANT:
Use the heaviest gauge wire available, up to 14 AWG (2.0 sq
mm), with a minimum of 18 AWG (1.0 sq mm), for all power
and earth ground wiring. Screw-type terminal blocks are
designed to accept up to one 14 AWG (2.0 sq mm) conductor
or up to two 18 AWG (1.0 sq mm) conductors. More than two
wires that are 18 AWG (2.0 sq mm) can be connected with a
wire nut. Include a pigtail with this wire group and attach the
pigtail to the terminal block.
IMPORTANT:
If the controller is used on Heating and Cooling Equipment
(UL 1995, U.S. only) and the transformer primary power is
more than 150 volts, connect terminal 2, (the 24 Vac common
[24 VAC COM] terminal) to earth ground (see Fig. 14). For
these applications, only one controller can be powered by
each transformer.
CONNECT POWER TO
TERMINALS 1 AND 2
COM
24 VAC
TRANSFORMER
Fig. 13. Power wiring details for one controller per
transformer
CONNECT POWER TO
TERMINALS 1 AND 2
120/240
VAC
TRANSFORMER
Fig. 15. Power wiring details for two or more controllers per transformer
31-00083—02
ΔP
1 1 1 1 1 1 1 2 2 2 2 2
3 4 5 6 7 8 9 0 1 2 3 4
1 1
1 2 3 4 5 6 7 8 9 0 1 2
EARTH
GROUND
(TERMINAL 3)
OUTPUT
DEVICE
POWER
M33634
ΔP
1 1 1 1 1 1 1 2 2 2 2 2
3 4 5 6 7 8 9 0 1 2 3 4
1 1
1 2 3 4 5 6 7 8 9 0 1 2
EARTH
GROUND (TERMINAL 3)
COM
24 VAC
OUTPUT
DEVICE
POWER
CONNECT POWER TO
TERMINALS 1 AND 2
TRANSFORMER
LINE VOLTAGE
1
GREATER
THAN 150 VAC EARTH
GROUND
1 IF THE CONTROLLER IS USED IN UL 1995 EQUIPMENT AND THE
PRIMARY POWER IS MORE THAN 150 VOLTS, GROUND 24 VAC COM
SIDE OF TRANSFORMER SECONDARY.
Fig. 14. Transformer power wiring details for one
controller used in UL 1995 equipment (U.S. only).
More than one controller can be powered by a single
transformer. Fig. 15 shows power wiring details for multiple
controllers.
NOTE: Controller configurations are not necessarily limited to
three devices, but the total power draw, including accessories,
cannot exceed 100 VA when powered by the same
transformer (U.S. only). For power wiring recommendations,
see "Power" on page 13.
1 1 1 1 1 1 1 2 2 2 2 2 1 1 1 1 1 1 1 2 2 2 2 2
3 4 5 6 7 8 9 0 1 2 3 4 3 4 5 6 7 8 9 0 1 2 3 4
1 1
1 2 3 4 5 6 7 8 9 0 1 2
EARTH
GROUND (TERMINAL 3)
16
ΔP
1 1 1 1 1 1 1 2 2 2 2 2
3 4 5 6 7 8 9 0 1 2 3 4
1 1
1 2 3 4 5 6 7 8 9 0 1 2
EARTH
COM
GROUND
(TERMINAL 3)
24 VAC
OUTPUT
DEVICE
POWER
1 1
1 2 3 4 5 6 7 8 9 0 1 2
EARTH
GROUND (TERMINAL 3)
M33636
M33635