Carrier 50ZPA Installation Instructions Manual

Electric Heaters
reer. as
SMALL PACKAGED PRODUCTS
Accessory Electric Heaters
For Models: 50ZPA, 564B, PA3Z,
50ZHA, 664B, PH3Z
Installation Instructions
NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS
Installation and servicing of this equipment can be hazardous due to
mechanical and electrical components. Only trained and qualified
personnel should install, repair, or service this equipment.
Untrained personnel can perform basic maintenance functions such
as Cleaning and replacing air filters. All other operations must be
performed by trained service personnel. When working on this
equipment, observe precautions in the literature, on tags, and on la-
bels attached to or shipped with the unit and other safety precautions
that may apply.
Follow all safety codes. Installation must be in compliance with lo-
cal and national building codes. Wear safety glasses, protective
clothing, and work gloves. Have fire extinguisher available. Read
these instructions thoroughly and follow all warnings or cautions
included in literature and attached to the unit.
Recognize safety information. This is the safety-alert symbol A.
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 se-
rious 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 en-
hanced installation, reliability, or operation.
Follow all safety codes. Wear safety glasses and work gloves. Have
a fire extinguisher available.
Before proceeding with heater installation, inspect thoroughly for
shipping damage. Notify shipper immediately if any damage is
found. Clean all dirt, dust and moisture from heater package. Check
for proper clearances of live parts, between phases and to ground.
Make sure that all required barriers are in place. Check conductors
run in multiple to insure that they are properly wired. Refer to unit
installation instructions for complete unit installation details. The
minimum air quantity for safe electric heater operation is shown in
Table 2.
4 WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Before performing installation, service or maintenance
operations on this system, turn off all main power to system.
There may be more than one disconnect switch. Turn off
accessory heater power switch if applicable. Lock out and tag
switch with a suitable warning label.
DESCRIPTION AND USAGE
These heaters are comprised of a separate heater module mounted
on the blower inlet and remote mounted controls located in the unit
control box. Heater models are provided with single point electrical
connections for powering both the heater and the unit.
These heaters are intended for use only in SPP units as noted in Table
1.
INSTALLATION
HEATER INSTALLATION
1. Open all electrical disconnects and install lock-out tag
before beginning any installation or service work.
. Check for proper equipment model number from list in
Table 1.
3. Remove unit side panel to access blower compartment (See
Fig. 1).
4, Disconnect wiring to motor by removing speed selection
and power plugs from bottom of motor.
5. Remove rear blower support bracket; set bracket and
attached motor wiring on top of unit.
6. Remove screws securing blower to front blower support
bracket; slide blower out of unit.
7. Open heater package and remove heater module; secure
heater module to standoffs on blower inlet with (3) screws
and (3) washers provided (see Fig. 2) and reinstall
heater/blower assembly.
8. Reinstall rear motor support bracket and attached motor
wiring. Do not reattach motor wiring plugs to motor at
this time.
9, Remove heater wiring cover plate from interior partition
between blower and control box (See Fig. 3) and install
heater wiring plug attachment plate provided with heater.