442 01 2405 01
April 2009
Specifications are subject to change without notice.
X40158 Rev. B
INSTALLATION INSTRUCTIONS
Modular Blower
(115 Volt)
MB08B1500B, MB12F1900B, MB16J2200B, MB20L2400B
These instructions must be read and understood completely before attempting installation.
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical
shock, or other conditions which may cause death,
personal injury, or property damage. Consult a qualified
installer, service agency, or your distributor or branch for
information or assistance. The qualified installer or
agency must use factory
−
authorized kits or accessories
when modifying this product. Refer to the individual
instructions packaged with the kits or accessories when
installing.
Follow all safety codes. Wear safety glasses, protective
clothing, and work gloves. Use quenching cloth for
brazing operations. Have fire extinguisher available.
Read these instructions thoroughly and follow all
warnings or cautions included in literature and attached
to the unit. Consult local building codes, the current
editions of the National Electrical Code (NEC) NFPA
70.
In Canada refer to the current editions of the Canadian
Electrical Code CSA C22.1 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 these 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 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.
TABLE OF CONTENTS
General Information/Installation
2
. . . . . . . . . . . . . . . . . .
Installation
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horizontal Installation
3
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Ductwork Connection
3
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Filter Installation
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Connection
4
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Motor Speed and Airflow
5
. . . . . . . . . . . . . . . . . . . . . . . .
Blower Performance
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Airflow Check
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Diagram
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement Parts
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to turn off electric power could result in per-
sonal injury or death.
Before installing or servicing system, turn off main
power to the system. There may be more than one
disconnect switch, including accessory heater(s).