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2
Outdoor Air Temperature (OAT) Sensor
41
. . . . . . .
EconoMi$er2
41
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Field Connections
42
. . . . . . . . . . . . . . . . . . . . . . . . . .
Space Temperature (SPT) Sensors
42
. . . . . . . . . . . .
Indoor Air Quality (CO
2
) Sensor
42
. . . . . . . . . . . . .
Outdoor Air Quality Sensor
43
. . . . . . . . . . . . . . . . .
Space Humidity Sensor or Humidistat
43
. . . . . . . . .
Smoke Detector/Fire Shutdown (FSD)
44
. . . . . . . . .
Connecting Discrete Inputs
44
. . . . . . . . . . . . . . . . . .
Communication Wiring -- Protocols
45
. . . . . . . . . . . .
General
45
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Local Access
46
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RTU Open Troubleshooting
46
. . . . . . . . . . . . . . . . .
Outdoor Air Enthalpy Control
47
. . . . . . . . . . . . . . . . .
Differential Enthalpy Control
47
. . . . . . . . . . . . . . . .
Return Air Enthalpy Sensor
47
. . . . . . . . . . . . . . . . .
Smoke Detectors
48
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Step 14 -- Adjust Factory--Installed Options
54
. . . . . . . .
Step 15 -- Install Accessories
54
. . . . . . . . . . . . . . . . . . .
START--UP CHECKLIST
55
. . . . . . . . . . . . . . . . . . . . . . .
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical
shock or other conditions which may cause 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 and work
gloves. Use quenching cloths for brazing operations and
have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions attached to
the unit. Consult local building codes and appropriate
national electrical codes (in USA, ANSI/NFPA70, National
Electrical Code (NEC); in Canada, CSA C22.1) for special
requirements.
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.
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect gas piping from unit when leak testing at
pressure greater than 0.5 psig (3450 Pa). Pressures
greater than 0.5 psig (3450 Pa) will cause gas valve
damage resulting in hazardous condition. If gas valve
is subjected to pressure greater than 0.5 psig (3450
Pa), it must be replaced before use. When pressure
testing field--supplied gas piping at pressures of 0.5
psig (3450 Pa) or less, a unit connected to such piping
must be isolated by closing the manual gas valve.
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal
injury or death.
Before performing service or maintenance operations
on unit, always turn off main power switch to unit and
install lock(s) and lockout tag(s). Unit may have more
than one power switch.
!
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal
injury, death and/or equipment damage.
Puron
r
(R--410A) refrigerant systems operate at
higher pressures than standard R--22 systems. Do not
use R--22 service equipment or components on Puron
refrigerant equipment.
!
WARNING
PERSONAL INJURY AND ENVIRONMENTAL
HAZARD
Failure to follow this warning could cause personal
injury or death.
Relieve pressure and recover all refrigerant before
system repair or final unit disposal.
Ware safety glasses and gloves when handling
refrigerants. Keep torches and other ignition sources
away from refrigerants and oils.
!
WARNING
CUT HAZARD
Failure to follow this caution may result in personal
injury.
Sheet metal parts may have sharp edges or burrs. Use
care and wear appropriate protective clothing, safety
glasses and gloves when handling parts and servicing
air conditioning equipment.
CAUTION
!
48H
C
Summary of Contents for 48HC Series
Page 24: ...24 C12251 Fig 42 ComfortLink Control Wiring Diagram 48HC 3 5 Ton Units 48HC ...
Page 27: ...27 C12254 Fig 45 48HC ComfortLink with Humidi MiZer Power Wiring Diagram 575V 3 Ph 60 Hz 48HC ...
Page 29: ...29 C101145 Fig 48 PremierLink Wiring Schematic 48HC ...
Page 30: ...30 C101146 Fig 49 PremierLink Wiring Schematic with Humidi MiZerR 48HC ...
Page 39: ...39 C101147 Fig 69 RTU Open System Control Wiring Diagram 48HC ...
Page 40: ...40 C101148 Fig 70 RTU Open System Control Wiring Diagram with Humidi MiZerR 48HC ...