Carrier 50PG03-16 Dokumentacja Pobierz pdf (Strona 3)

Differential Enthalpy Control Installation

48/50PG03-16 UNITS

NOTE: If installing the differential enthalpy control on an

accessory economizer, it is easier to install the differential

enthalpy control prior to installing the economizer. If installing

on a factory-installed economizer, it is easier to install the

differential enthalpy control prior to installing the economizer

hoods.

NOTE: The accessory enthalpy switch (CRENTSNG002A00)

is required with the accessory differential enthalpy control

(CRENTDIF002A00) to provide the differential enthalpy

control function. The accessory enthalpy switch

(CRENTSNG002A00) must be installed to sense outdoor

enthalpy and to provide input to the control system.

1. Remove the screws securing the economizer hood panel

to the unit. Save the screws for use later.

NOTE: On size 03-14 units with factory-installed

economizers, the panel will be hinged and should not be

removed from the unit. Open the hinged panel and

secure.

2. If the economizer is installed, it must be completely

removed at this time.

3. Remove the plug button and install the grommet supplied

into the hole. See Fig. 1.

4. Locate holes in the partition. Mount the differential

enthalpy control on the back side of the partition directly

behind the enthalpy switch as shown in Fig. 4 using the

No. 8 screws provided.

5. Route the two wires included with the accessory through

the grommet and into the return section of the unit.

Connect the black wire to the “–” terminal and the red

wire to the “+” terminal on the Differential Enthalpy

Control. See Fig. 5.

6. Connect the wires from the Differential Enthalpy Control

to the Enthalpy Switch. The black wire should connect to

the “–” terminal and the red wire to the “+” terminal on

the Enthalpy Switch. See Fig. 2 and 6.

7. Complete installation of the economizer. If the economiz-

er was previously installed, reinstall the economizer.

8. Replace (or close if hinged) the economizer hood panel

using the screws saved from Step 1.

9. Restore power to the unit and configure the unit for use

with the accessory. See Configuring the Control System

sectiononpage5.

48/50HG AND 48/50PG20-28 UNITS

NOTE: For horizontal applications it is easiest to install the

differential enthalpy control prior to making duct connections.

NOTE: The accessory enthalpy switch (CRENTSNG002A00)

is required with the accessory differential enthalpy control

(CRENTDIF002A00) to provide the differential enthalpy

control function. The accessory enthalpy switch

(CRENTSNG002A00) must be installed to sense outdoor

enthalpy and to provide input to the control system.

1. Remove the damper motor access panel at the return end

of the unit. Save the screws for use later.

2. Punch a

-in. hole in the economizer block-off panel as

showninFig.7.

3. Install the grommet supplied into the

-in. hole.

4. Route the two wires included with the accessory through

the grommet and into the return section of the unit.

Connect the black wire to the “–” terminal and the red

wire to the “+” terminal on the Differential Enthalpy

Control. See Fig. 5.

Prior to installation of this accessory, make sure all power

is disconnected to the unit and locked out. Failure to

disconnect power supply prior to servicing may result in

serious injury.

When removing panels from the unit, be careful not to

damage the roof or other surfaces with the panels.

IMPORTANT: Be sure all seal strips and RTV sealant

are intact. A watertight seal to inside of unit must be

maintained.

Prior to installation of this accessory, make sure all power

is disconnected to the unit and locked out. Failure to

disconnect power supply prior to servicing may result in

serious injury.

ENTHAPLY

SWITCH

DIFFERENTIAL

ENTHAPLY

CONTROL

Fig. 4 — Differential Enthalpy Control Location

(Side View) — 48/50PG03-16

Fig. 5 — Differential Enthalpy Control Details

1 2 3 4 5 6 7 8

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