1053681-UIM-B-0514
SINGLE PIECE, 4 POSITION
AIR HANDLERS
MODELS: AHR SERIES
INSTALLATION MANUAL
ISO 9001
Certified Quality
Management System
LIST OF SECTIONS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
UNIT INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
DUCTWORK AND CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . .5
ELECTRIC HEATER INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . .8
LINE POWER CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
LOW VOLTAGE CONTROL CONNECTIONS . . . . . . . . . . . . . . . . . .9
BLOWER SPEED CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 9
UNIT DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
TYPICAL THERMOSTAT CONNECTIONS . . . . . . . . . . . . . . . . . . . 17
START UP SHEET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
LIST OF FIGURES
Return Duct Attachment & Component Location . . . . . . . . . . . . . . . . .2
Dimensions & Duct Connection Dimensions . . . . . . . . . . . . . . . . . . . .3
Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Condensate Deflector on Vertical Drain Pan . . . . . . . . . . . . . . . . . . . .5
Condensate Deflector on Horizontal Drain Pan Edge . . . . . . . . . . . . .5
S-Clip Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Horizontal Suspension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Duct Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Ductwork Transition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
TXV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Proper Bulb Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Blower Delay Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Line Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Blower Speed Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Wiring Diagram - PSC - Single Phase Heat Kits . . . . . . . . . . . . . . . 15
Wiring Diagram - Phase Heat Kits . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Typical Wiring Diagram - PSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
LIST OF TABLES
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Physical and Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Electrical Data - Cooling Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Electrical Heat: Minimum Fan Speed . . . . . . . . . . . . . . . . . . . . . . . . .10
Electrical Heat Performance Data: 208/230-1-60 & 208/230-3-60 . . .10
Electrical Data For Single Source Power Supply: 208/230-1-60 . . . . 11
Electrical Data For Multi-Source Power Supply: 208/230-1-60 . . . . . 12
Electrical Data For Single Source Power Supply: 208/230-3-60 . . . . 12
Electrical Data For Multi-Source Power Supply: 208/230-3-60 . . . . . 13
Air Flow Data (CFM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
SECTION I: GENERAL
The AHR single piece air handler series provides the flexibility for instal-
lation in any position. This unit may be used for upflow, downflow, hori-
zontal right, or horizontal left applications.
These units may be located in a closet, utility room, attic, crawl space,
or basement. These versatile models may be used for cooling or heat
pump operation with or without electric heat.
Top and side power wiring and control wiring, accessible screw termi-
nals for control wiring, easy to install drain connections, and electric
heaters all combine to make the installation easy and minimize installa-
tion cost.
Electric heat kits are available as field installed accessories. Single
phase and 3 phase kits are available and range from nominal 2.5 kW to
25 kW sizes.
A Brand Label (available from Distribution) may be applied to the center
of the blower access panel.
SECTION II: SAFETY
This is a safety alert symbol. When you see this symbol on
labels or in manuals, be alert to the potential for personal
injury.
Understand and pay particular attention to the signal words
DANGER
,
WARNING
, or
CAUTION
.
DANGER
indicates an
imminently
hazardous situation, which, if not
avoided,
will result in death or serious injury
.
WARNING
indicates a
potentially
hazardous situation, which, if not
avoided,
could result in death or serious injury
.
CAUTION
indicates a potentially hazardous situation, which, if not
avoided
may result in minor or moderate injury.
It is also used to
alert against unsafe practices and hazards involving only property dam-
age.
Improper installation, adjustment, alteration, or maintenance may cre-
ate a condition where the operation of the product could cause per-
sonal injury or property damage. Refer to this manual for assistance,
or for additional information, consult a qualified contractor, installer, or
service agency.
This product must be installed in strict compliance with the installation
instructions and any applicable local, state, and national codes
including, but not limited to building, electrical, and mechanical codes.
FIRE OR ELECTRICAL HAZARD
Failure to follow the safety warnings exactly could result in serious
injury, death or property damage. A fire or electrical hazard may result
causing property damage, personal injury or loss of life.
