Bryant 542E - Manual

installation, operation,
and maintenance instructions
PACKAGED HEAT PUMPS
542E
Sizes 024 thru 06(f
& 542D060
NOTE: Installation must conform to the guidelines pre­
sented in these unit Installation Instructions. Read and
become familiar with these instructions before starting in­
stallation.
Models 542D and 542E Packaged Heat Pumps are fully self-
contained combination heating/cooling units designed for
outdoor installation. Model 542E may be installed either on
a rooftop or ground level slab. Model 542D is used in con­
junction with an accessory roof mounting curb and incorpor­
ates a down-discharge/return-air plenum as an integral part
of the unit.
These packaged heat pumps are factory-charged and sealed.
Installation is easy—simply connect condensate drain, air
ducts, high- and low-voltage wiring, and install a field-sup­
plied air filter in the return-air ductwork (except for Model
542D which has factory-supplied high-capacity air filters) to
obtain heating during the heating season, cooling and
dehumidification during the cooling season, and filtering of
the conditioned space.
All units can be connected into existing duct systems that
are properly sized and designed to handle an airflow of 400 to
450 ft^lmin per each 12,000 Btuh of unit capacity.
Accessory UL-listed, field-installed, supplemental electric
heat packages are available in a variety of KW and voltage
options. These electric resistance heaters mount inside the
unit blower compartment.
Important-Read Before Installing
1. Check all local and other applicable codes for informa­
tion concerning proximity to property lines, height
above roof, obstructions, or other special installation re­
quirements.
2. Make certain that power supply available (volts, hertz,
and phase) corresponds to that specified on unit rating
plate.
3. Check electrical supply provided by utility to be sure
that service capacity is sufficient to handle load imposed
by unit being installed.
4. Refer to the 542D or 542E dimensional drawing for loca­
tions of electrical inlets, condensate drain, duct connec­
tions, and required clearances before setting unit in
place.
GENERAL
Models 542D and 542E Packaged Heat Pumps have been de­
signed and tested in accordance with ARI Standard 240-77
and 270-75, and are UL-listed.
These instructions contain the following sections:
I. Moving and Setting Unit in Place
II. Condensate and Defrost Disposal
III. Duct Connections
IV. Electrical Connections
V. Preparing Unit for Startup
Cancels: New 40542DP6-A
12/15/79
A79110
Figure 1—Model 542E
flplt
A79111
Figure 2—Model 542D060 Mounted On
Accessory Roof Mounting Curb
VI. Refrigerant Leaks
VII. Startup and Adjustments
VIII. Sequence of Operation
IX. Care and Maintenance
I. MOVING AND SETTING UNIT IN PLACE
CAUTION:
P jvc ■aiition.' Mui.-iT hf lakcii 1o prevunl d.itnage
wlic-n nio\ing the unit. The unit intfrl remain in at) upright
position during all rigging and moving oper;ition.-!, lie .-iure
to |)j-olect the top and ■iide-! of the unit by using spreaders
when rigging the unit to be lifted. Model 5i2n mu.st be
rigged for lifting as .shown in Figure 7. Model .542E must he
rigged for lifting ;is shovsn in Figure
The unit must be installed level for proper condensate
drainage. Be sure that the ground level pad, field-fabricated
support, or accessory roof mounting curb is level before set­
ting the unit in place.
When selecting an installation site, try to locate the unit on
the side opposite the prevailing wind to assure proper opera­
tion of the defrost cycle and to avoid snow drifts that could
block the outdoor coil. Be sure that the unit is installed at least
6 inches above the highest probable snow level to prevent
blockage of the outdoor coil and assure proper drainage of
defrosted ice.
A. Rooftop Installation
When installing a Model 542D downflow unit or a Model
542E end-discharge unit with an accessory downflow
BDP Company, Division of Carrier Corp.