Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480312-01
Printed in U.S.A.
Form IIK-CRECOMZR54-04
Pg 1
7-21 Replaces: IIK-CRECOMZR54-03
Installation Instructions
Part No. CRECOMZR054B00, CRECOMZR055B00
CONTENTS
Page
PACKAGE CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
PACKAGE CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
VERTICAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . 3
Barometric Hood Assembly . . . . . . . . . . . . . . . . . . . . 8
• BAROMETRIC HOOD (VERTICAL CONFIGURATION)
HORIZONTAL INSTALLATION . . . . . . . . . . . . . . . . . 12
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
PACKAGE CONTENTS
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 extinguisher
available for all brazing operations.
It is important to 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, CAUTION,
and NOTE. 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 hazards
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
UNIT SIZE
PART NUMBER
Short Chassis 44 in. Tall
CRECOMZR054B00
Tall Chassis 52 in. Tall
CRECOMZR055B00
IMPORTANT: Read these instructions completely before
attempting to install the accessory EconoMi$er2 system.
UNIT NO.
QTY
CONTENTS
CRECOMZR054B00
1
Damper Assembly
1
Upper End Economizer Panel
1
Bottom Panel with Relief Damper
(for vertical only)
1
Bottom Panel #2 (for horizontal only)
1
Side Replacement Panel (for horizontal
only)
3
Filter Supports
3
Central Retainer
2
Side Retainer
1
Hood Top
1
Left Hood Side
1
Right Hood Side
2
Top Diverters
3
Deflector
4
Outside Air Filter Screens
1
Hardware bag with screw, etc.
CRECOMZR055B00
1
Damper Assembly
1
Upper End Economizer Panel
1
Bottom Panel with Relief Damper (for
vertical only)
1
Bottom Panel #2 (for horizontal only)
1
Side Replacement Panel (for horizontal
only)
3
Filter Supports
3
Central Retainer
2
Side Retainer
1
Hood Top
1
Left Hood Side
1
Right Hood Side
2
Top Diverters
3
Deflector
4
Outside Air Filter Screens
1
Hardware bag with screw, etc.
CAUTION
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
and/ or death.
Disconnect power supply and install lockout tag before
attempting to install accessory.
Vertical and Horizontal
Economi$er
®
2 Accessory
Medium Rooftop Units
15 to 27.5 Tons