CRTWOPOS007A00
CRTWOPOS008A00
Installation Instructions
48/50PD05–06, 48/50PG03–14
TWO---POSITION DAMPER ACCESSORY
SINGLE PACKAGE ROOFTOP UNITS
IMPORTANT
: Read these instructions completely before
attempting to install the accessory two--position damper
SAFETY CONSIDERATIONS
Installation and servicing of air--conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified service personnel should install, repair, or
service air--conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters and replacing filters. All other operations
should be performed by trained service personnel. When working
on air--conditioning equipment, observe precautions in the
literature, tags and labels attached to the unit, and other safety
precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for unbrazing operations. Have fire extinguishers
available for all brazing operations.
Recognize safety information. This is the safety--alert symbol
.
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, and
CAUTION. These words are used with the safety--alert symbol.
DANGER identifies the most serious hazards which
will
result in
severe personal injury or death. WARNING signifies a hazard
which
could
result in personal injury or death. CAUTION is used
to identify unsafe practices which
may
result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which
will
result in enhanced installation, reliability, or
operation.
PACKAGE CONTENTS
QTY
CONTENTS
1
Hardware Bag
1
Bottom Panel
1
Top Panel/Damper Assembly
PACKAGE USAGE
UNIT
48/50PD
48/50PG
PART NUMBER
SHIPPING
WEIGHT (lb)
03-07
CRTWOPOS007A00
65
08-14
CRTWOPOS008A00
85
GENERAL
The accessory two-position damper is designed for use on units
without economizers.
The two-position damper accessory allows the unit to control the
outside-air dampers by opening the dampers whenever the indoor
fan is operating and closing the dampers when the indoor fan is off.
There is no modulation associated with the two-position damper
assembly.
INSTALLATION
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Turn off unit power supply and install lockout tag.
!
WARNING
To install the two-position damper, perform the following:
1. Make sure power supply is turned off and lockout tag is
installed.
2. Unscrew and remove the front cover panel on the return end
of the unit to expose the return section of the unit. (See Fig.
1.) Discard panel and save screws.
3. Install the bottom panel over the return air compartment.
Use screws saved from Step 2. (See Fig. 1.)
4. Connect the plug from the two-position damper actuator to
the 6-pin economizer/two-position damper plug in the
return air compartment of the unit. (See Fig. 1 and 2.)
5. Adjust two-position damper to desired setting. Two-
position damper performance is shown in Fig. 3 and 4. To
adjust damper, locate the adjustable stop on the actuator.
Loosen but do not remove the screw. Align pointer with
desired setting based on the return duct static pressure and
airflow. Tighten screw.
6. Install the top panel assembly over the top section of the
return air compartment. The top panel assembly should
overlap the bottom panel installed in Step 3. Use screws
provided. (See Fig. 1.)
7. Remove lockout tag and restore power to unit.
Copyright 2009 CAC / BDP
D
7310 W. Morris St.
D
Indianapolis, IN 46231
Printed in U.S.A.
Edition Date: 9/09
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Catalog No:IIK---CRTWOPS07---01
Replaces: 48/50PG--- 4SI