Carrier 33CSPREMLK specifications Adapter onto terminals P1 and P of actuator, See Fig

HH57AC077

ENTHALPY

CONTROL

BRACKET

HH57AC078 ENTHALPY
SENSOR (USED WITH
ENTHALPY CONTROL	C7400A1004
FOR DIFFERENTIAL
ENTHALPY OPERATION)	+

MOUNTING PLATE

Fig. 22 — Differential Enthalpy Control,

Sensor and Mounting Plate (33AMKITENT006)

Fig. 23 — Location of Differential Enthalpy Controller and Return Air Enthalpy Sensor (40RM Unit Shown)

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.

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.

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

A B C TR

D SO

SR

2

TR1

+

+

3

BRN

RED

BLK

RED

S (RETURN AIR

+ENTHALPY

SENSOR)

	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-

LED

1

GRAY

GRAY

WIRE HARNESS IN UNIT

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.

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

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.

22