Filter
Top Products
22
Q769B — Because the Honeywell adapter is designed for a
negative 4 to 20 mA input instead of a positive signal, the
Q769B adapter requires a separate transformer and a current
loop isolator to perform properly. Connecting the adapter
directly to the PremierLink controller could cause the 4 to
20 mA output on the controller to be permanently dam-
aged. This condition is followed by a constant 36 vdc output
from the PremierLink™ economizer output (J-9).
The Q769B adapter is supplied with female quick-connect
terminal that fits over the male quick-connect P1 and P on the
actuator.
To connect the Q769B adapter to the actuator, follow these
steps and refer to Fig. 26:
1. Remove power from unit.
2. Remove the logic module from the actuator and discard.
3. Mount the adapter on the actuator by gently pushing the
adapter onto the P1 and P terminals on actuator.
NOTE: Be sure the plus (+) terminal on the adapter con-
nects to P1 on the actuator and the minus (–) terminal on
the adapter connects to P terminal on the actuator. See
Fig. 26.
4. Using field-supplied wire, connect the plus (+) terminal
on the adapter to the plus (+) terminal on the loop isolator.
Connect the minus (–) terminal on the adapter to the
minus (–) terminal on the loop isolator.
5. Using the transformer supplied with the 40RM econo-
mizer, connect 24 vac to actuator terminals TR and TR1.
6. Connect the plus (+) terminal from the loop isolator to
J9-1 terminal on the PremierLink Controller. Connect the
minus (–) terminal from the loop isolator to J9-2 terminal
on the PremierLink Controller.
7. Restore power to unit.
Q769C — The Q769C adapter incorporates a female quick-
connect terminal that attaches to P1 and P male quick-connects
on the actuator.
To connect the Q769C adapter to the actuator, follow the steps
below and refer to Fig. 27:
1. Remove power from unit.
2. Remove the logic module from the actuator and discard.
3. Mount the adapter onto the actuator by gently pushing the
adapter onto terminals P1 and P of actuator.
4. NOTE: Be sure the plus (+) terminal on the adapter
connects to P1 on the actuator and the minus (–) terminal
on the adapter connects to P terminal on the actuator.
See Fig. 27.
5. Using the transformer supplied with the 40RM econo-
mizer, connect 24 vac to actuator terminals TR and TR1.
6. Connect 500-ohm resistor (field supplied) to the plus (+)
and minus (–) terminals on adapter.
7. Connect the plus (+) terminal from the adapter to J9-1
terminal on the PremierLink Controller. Connect the
minus (–) terminal from the adapter to J9-2 terminal on
the PremierLink Controller.
8. Restore power to unit.
IMPORTANT: It is recommended that the Q769C adapter
be used with a field-supplied 500-ohm resistor across the
terminals. Using the Q769C with actuator requires a sepa-
rate, field-supplied transformer because the actuator with
Q769C is a positive ground device. The PremierLink con-
trol is a negative ground device. The positive P1 terminal
on the Q769C goes to ground. See Fig. 27.
BRACKET
+
C7400A1004
Fig. 22 — Differential Enthalpy Control,
Sensor and Mounting Plate (33AMKITENT006)
HH57AC077
ENTHALPY
CONTROL
HH57AC078 ENTHALPY
SENSOR (USED WITH
ENTHALPY CONTROL
FOR DIFFERENTIAL
ENTHALPY OPERATION)
MOUNTING PLATE
Fig. 23 — Location of Differential Enthalpy
Controller and Return Air Enthalpy Sensor
(40RM Unit Shown)
LED
A
B
C
D
TR TR1
SO
SR
2
3
1
+
+
S
+
(RETURN AIR
ENTHALPY
SENSOR)
BRN
RED
GRAY
GRAY
WIRE HARNESS
IN UNIT
BLK
RED
NOTES:
1. Remove factory-installed jumper across SR and + before con-
necting wires from return air sensor.
2. Switches shown in high outdoor air enthalpy state. Terminals 2
and 3 close on low outdoor air enthalpy relative to indoor air
enthalpy.
3. Remove sensor mounted on back of control and locate in out-
side airstream.
Fig. 24 — Outside and Return Air Sensor Wiring
Connections for Differential Enthalpy Control