Submittal Sheet

ML6984, ML7984 SERIES 4000 DIRECT COUPLED VALVE ACTUATORS
10
95C-10939—6
ML6984 XL10 Controller Compatibility:
XL10 controllers are designed to work with constant-speed
ac tu a tors. ML6984 actuators use direct current motors
which vary their speed as the valve seats or if power supply
voltage is not con sist ent. ML6984 actuators in 5-wire mode
offer 30 discrete positions only. To min i mize 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. 18. ML6984 with Honeywell T87K
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
To Replace ML784 or ML984:
1. The old ML784 or ML984 actuators cannot be used
with new ML7984 valve actuators in the same circuitry,
unless the old models are each powered by their own
trans form er to prevent cross-talking.
2. The ML7984 is a direct replacement for all old ML784
and ML984, except:
a. When replacing the old reverse acting models, the
sig nal input wires to the new devices no longer
need to be re versed. Just follow the terminal
polarity des ig na tions and DIP switch settings.
b. When replacing the old actuator which has an
Elec tron ic Series 90 “Supermod” controller -
e.g.: T775, W973, H775, W7100 - the old interface
resistor must be removed. The ML7984 Series
4000 will work directly with the controller with out
the external 240 ohm resistor.
c. When replacing the old ML784 (mA model) in
multiple-actuator installations, resistor(s) will be
need ed. Use Resistor Kit (part no. 272822) and
set DIP switches ac cord ing ly. See Figures 17
and 18.
To Replace ML684A:
1. The new ML6984 is a direct replacement for the old
ML684A in single actuator or parallel mul ti ple actuators
hook-up. The old and new actuators can be mixed
in the same electrical circuit. For multiple actuators
con trol led by a common controller in par al lel, these
actuators must be wired so that they all travel in the
same direction.
2. When replacing the ML684A1009 (80 lbf) with this
new ML6984 on the V5045 valve, the installed valve
adaptor (part no. 272629A) on the valve stem and
ac tu a tor assembly is still needed.
Fig. 19. ML6984 with FocusPro
™
Electronic Thermostat.
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
BWR
T6 T5 5
POWER TO OPEN
AND POWER TO
CLOSE
MOTOR OR VALVE
(SERIES 20)
THERMOSTAT WIRING TERMINALS
Fig. 17. ML6984 with Honeywell T87F
Round
™
Thermostat.
L1
L2
R
W
T6T5
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
See Fig. 19, if connecting TH5110D or TH6110D
FocusPRO
™
thermostats to ML6984. Confi gure the
thermostats for Series 20 operation.