ML6984, ML7984 SERIES 4000 DIRECT COUPLED VALVE ACTUATORS
95C-10939—11
10
NOTE:
The 272630D position feedback/auxiliary switch
module cannot be used with ML6984 3-wire
installation. The 272630D requires continuous
power.
ML6984 XL10 Controller
Compatibility
XL10 controllers are designed to work with constant-speed
actuators. ML6984 actuators use direct current motors
which vary their speed as the valve seats or if power supply
voltage is not consistent. ML6984 actuators in 5-wire
mode offer 30 discrete positions only. To minimize
potential valve position drift, XL10 controllers should use
the 3-wire installation and be programmed for a daily valve
exercise cycle.
ML6984 On-Off Operation
For on-off operation, ML6984 requires a 24 Vac SPDT
contact. An interface relay such as RA889 is required to
power the anticipator heater of an electromechanical
thermostat such as T87F (See Fig. 17).
Fig. 17. ML6984 with Honeywell T87F Round™
Thermostat.
If connecting the ML6984 directly to a T87F with a Series
20 sub-base, clip out the cooling anticipation resistor on
the sub-base between terminals R
c
and Y. This is needed
for electrical compatibility with ML6984 but may result in
wider room temperature swings due to the loss of
anticipation.
REPLACEMENT NOTES
Fig. 18. ML6984 with Honeywell T87K Round™
Thermostat.
See Fig. 19, if connecting TH5110D or TH6110D
FocusPRO™ thermostats to ML6984. Configure the
thermostats for Series 20 operation.
Fig. 19. ML6984 with FocusPro™ Electronic Thermostat.
L1
L2
R
W
T6
T5
B
R
W
1K
1K1
ML6984
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
1
2
2
SET HEATING ANTICIPATOR TO MATCH CURRENT DRAW OF
RELAY 1K. DO NOT ROUTE RELAY CONTACTS THROUGH
THERMOSTAT.
M25501
M25502
T6
T5
C
B
W
R
1
W
Y
R
HEATING ONLY
T6
T5
C
B
W
R
1
W
Y
R
COOLING ONLY
1
CLASS 2 TRANSFORMER. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
24Vac
24Vac
ML6984
UP
DOWN
ML6984
UP
DOWN
M25503
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
OPTIONAL 24 VAC COMMON CONNECTION.
CONFIIGURE SYSTEM TYPE TO HEAT ONLY IN THE INSTALLER SETUP.
TERMINALS R AND T5 ARE INTERNALLY CONNECTED.
1
2
3
4
5
R
C
1
L1
(HOT)
L2
ML6984
3
4
2
O/B
TH5110D
TH6110D
Rc
R
Y
C
W
G
B
W
R
T6
T5
5
POWER TO OPEN
AND POWER TO
CLOSE
MOTOR OR VALVE
(SERIES 20)
THERMOSTAT WIRING TERMINALS