Carrier CRSTATUS001A00 Installation And Operating Instructions Manual

Small Rooftop Units

Gas Heating/Electric Cooling

and Electric Cooling Units

1

3to12

⁄2Tons (50/60 Hz)

Accessory Fan/Filter Status Switch

Installation and Operating Instructions

Part Number CRSTATUS001A00

PACKAGE USAGE AND CONTENTS

PART NUMBER QUANTITY ITEM

LF32GF097 1 Plastic Cap
AL48AM217 2 Screws
50HJ500288 1 Control Tube (16 in.)
50HJ500301 1 Control Tube (32 in.)
HK06WC027 1 Pressure Switch

IMPORTANT: Read these instructions completely be­fore attempting to install the accessory fan/filter status
switch.

INSTALLATION

NOTE: The fan/filter status switch can be installed to moni­tor indoor fan status (ON/OFF) or filter status (CLEAN/
DIRTY). Follow the procedure below and perform the steps
necessary to install the pressure switch for the desired
application (as either a fan status switch or a filter status
switch, but not both).

Cancels: New IIK 548-36-14

9/1/94

Turn off unit power. Electrical shock and personal in­jury could result.

1. Remove the filter access door.No tools are required. Save
door.

2. Remove the pressure switch assembly from the carton.
Attach the 32-in. plastic control tube to the pressure switch
on the port nearest to the electrical connections. See
Fig. 1.

3. Filter Switch
Attach the 16-in. plastic control tube to the pressure switch

on the port nearest to the mounting bracket. See Fig. 1.
Fan Switch
Attach the plastic cap to the pressure switch on the port

nearest to the mounting bracket. See Fig. 1.

4. Attach the pressure switch assembly to the uppermost
portion of the inner flange of the corner post with 2 screws
provided. See Fig. 1.

5. Route the 32-in. control tube through the slot in the coil
baffle next to the harness assembly. The end should be
loose in the indoor fan area. See Fig. 1.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 111444
Tab 1a1b5a5a6a6b

PC 111 Catalog No. 564-809 Form 48/50-28SI Pg 1 9-94 Replaces: New

Fig. 1 — Fan/Filter Status Switch Installation

(Top View of Typical Rooftop Unit Shown)

6. Filter Switch
Suspend the 16-in. tube over the return air opening. See

Fig. 1.

7. Connect the 2 gray wires routed with the economizer
wiring harness assembly to the terminals on the pres­sure switch. See Fig. 2.

Fig. 2 — Mounting Fan/Filter Status Switch

8. If direct digital control is NOT being used on the unit,
connect the 2 gray wires in the low voltage compart­ment of the control box to the digital indicator wires
coming from the thermostat.

9. Filter Switch
If direct digital control is used on the unit, connect the

2 gray wires in the low voltage compartment of the
control box to the 10 and 11 pins of the direct digital
control.

Fan Switch
If direct digital control is used on the unit, connect

the 2 gray wires in the low voltage compartment of
the control box to the 8 and 9 pins of the direct digital
control.

10. Return power to unit.

11. To configure switch, perform the following:
Filter switch
Place the unit in Fan Only mode. The unit return air fil-

ter should be clean or new. Using a flat head screw­driver,rotatethe adjustment knob until the pressure switch
closes (see Fig. 1). Rotate the adjustment knob in the
same direction another

1

⁄4turn.
Fan Switch
Rotate the adjustment knob two full turns.

12. Reinstall filter access panel from Step 1.

OPERATION

When the pressure switch is set up as a filter switch, the
digital indicator light on the thermostat will be lit when the
filter is dirty and needs to be replaced. If direct digital con­trols are used, the filter status (CLEAN/DIRTY)will be sent
over the communication bus.

When the pressure switch is set up as a fan switch, the
digital indicator light on the thermostat will be lit when the
indoor fan is operating. If the indoor fan is being told to op­erate by the thermostat and the indicator light is not lit, serv­ice the unit immediately. If direct digital controls are used,
the indoor fan operation status (ON/OFF) will be sent over
the communication bus.

Copyright 1994 Carrier Corporation

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 111444
Tab 1a1b5a5a6a6b

PC 111 Catalog No. 564-809 Form 48/50-28SI Pg 2 9-94 Replaces: New