Bryant 548J*14D Series User manual

548J*14D
SINGLE PACKAGE ROOFTOP
HEAT PUMP
WITH WITH PURONR(R--410A) REFRIGERANT
SIZE 14
Installation Instructions
NOTE: Read the entire instruction manual before starting
the installation.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS 1....................
INSTALLATION 4...............................
Jobsite Survey 4................................
Step 1 -- Plan for Unit Location 4..................
Roof Mount 5...............................
Step 2 -- Plan for Sequence of Unit Installation 5......
Curb--Mount Installation 5.....................
Pad--Mount Installation 5......................
Frame--Mount Installation 5....................
Step 3 -- Inspect Unit 5...........................
Step 4 -- Provide Unit Support 5...................
Roof Curb Mount 5..........................
Slab Mount (Horizontal Units Only) 5...........
Alternate Unit Support 5......................
Step 5 -- Field Fabricate Ductwork 7................
For Units with Accessory Electric Heaters 7......
Step 6 -- Rig and Place Unit 7.....................
Step 7 -- Convert to Horizontal & Connect Ductwork 8.
Step 8 -- Install Outside Air Hood 8................
Economizer Hood Removal and Setup 8.........
Two Position Damper Hood Removal and Setup 9..
Economizer Hood and Two--Position Hood 10.....
Step 9 -- Install External Condensate Trap and Line 10.
Step 10 -- Make Electrical Connections 11...........
Field Power Supply 11........................
Units without Factory--Installed Disconnect 13....
Units with Factory--Installed Disconnect 13.......
Convenience Outlets 13.......................
Factory--Option Thru--Base Connections 15.......
Units without Thru--Base Connections 15.........
Field Control Wiring 15.......................
Thermostat 15...............................
Unit without Thru--Base Conversion Kit 16.......
Heat Anticipator Settings 16...................
Electric Heaters 16..............................
Single Point Boxes 17..........................
Heater Low--Voltage Control Connections 17......
Outdoor Air Enthalpy Control 18.................
Differential Enthalpy Control 18................
Return Air Enthalpy Sensor 18.................
RTU--MP Control System 19......................
Supply Air Temperature (SAT) Sensor 21.........
Outdoor Air Temperature (OAT) Sensor 22.......
EconoMi$er2 22.............................
Field Connections 22..........................
Space Temperature (SPT) Sensors 22............
Economizer Controls 23......................
Indoor Air Quality (CO2)Sensor 23.............
Outdoor Air Quality Sensor 24.................
Connecting Discrete Inputs 24..................
Communication Wiring -- Protocols 25............
General 25.................................
Local Access 25.............................
RTU--MP Troubleshooting 25..................
Smoke Detectors 27.............................
System 27..................................
Controller 27...............................
Sensor 27..................................
Smoke Detector Locations 28....................
Supply Air 28...............................
Return Air without Economizer 28..............
Return Air with Economizer 28.................
Step 11 -- Adjust Factory--Installed Options 32........
Step 12 -- Install Accessories 33...................

2
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.
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 lockout tag. 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.
Puronr(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.
Wear 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
heat pump units.
CAUTION
!
548J*14D

3
Horizontal Connections / Economizer
Vertical Connections / Economizer
C09895
Fig. 1 -- Unit Dimensional Drawing – Size 14 Unit
548J*14D

4
C10364
Fig. 1 -- Unit Dimensional Drawing – Size 14 Unit (cont.)
INSTALLATION
Jobsite Survey
Complete the following checks before installation.
1. Consult local building codes and the NEC (National
Electrical Code) ANSI/NFPA 70 for special installa-
tion requirements.
2. Determine unit location (from project plans) or select
unit location.
3. Check for possible overhead obstructions which may
interfere with unit lifting or rigging.
Step 1 — Plan for Unit Location
Select a location for the unit and its support system (curb
or other) that provides for at least the minimum clearances
required for safety. This includes the clearance to
combustible surfaces, unit performance and service access
below, around and above unit as specified in unit
drawings. See Fig. 2.
NOTE: Consider also the effect of adjacent units.
Unit may be installed directly on wood flooring or on Class
A, B, or C roof--covering material when roof curb is used.
Do not install unit in an indoor location. Do not locate air
inlets near exhaust vents , relief valves, or other sources of
contaminated air.
18”
(457)
*
42"
(1067)
*
Required bottom condensate drain connection.
Otherwise, 36” (914mm) for condensate connection.
42"
(1067)
42"
(1067)
C09897
Fig. 2 -- Service Clearance Dimensional Drawing
Although unit is weatherproof, avoid locations that permit
water from higher level runoff and overhangs to fall onto
the unit.
Select a unit mounting system that provides adequate
height to allow for removal and disposal of frost and ice
that will form during the heating--defrost mode as well as
allow installation of condensate trap per requirements.
RefertoStep9—InstallExternalCondensate Trap and
Line – for required trap dimensions.
548J*14D

5
Roof Mount —
Check building codes for weight distribution
requirements. Unit operating weight is shown in Table 1.
Table 1 – Operating Weights
548J*14D UNITS LB (KG)
Component 14D
Base Unit 1370 (620)
Economizer
Vertical 100 (45)
Horizontal 115 (52)
Powered Outlet 32 (15)
Curb
14---in/356 mm 180 (82)
24---in/610 mm 235 (107)
Step 2 — Plan for Sequence of Unit Installation
The support method used for this unit will dictate different
sequences for the steps of unit installation. For example,
on curb--mounted units, some accessories must be
installed on the unit before the unit is placed on the curb.
Review the following for recommended sequences for
installation steps.
Curb--mounted installation —
Install curb
Install field--fabricated ductwork inside curb
Install accessory thru--base service connection package
(affects curb and unit) (refer to accessory installation
instructions for details)
Prepare bottom condensate drain connection to suit
planned condensate line routing (refer to Step 9 for
details)
Rig and place unit
Install outdoor air hood
Install condensate line trap and piping
Make electrical connections
Install other accessories
Pad--mounted installation —
Prepare pad and unit supports
Check and tighten the bottom condensate drain
connection plug
Rig and place unit
Convert unit to side duct connection arrangement
Install field--fabricated ductwork at unit duct openings
Install outdoor air hood
Install condensate line trap and piping
Make electrical connections
Install other accessories
Frame--mounted installation —
Frame--mounted applications generally follow the
sequence for a curb installation. Adapt as required to
suit specific installation plan.
Step 3 — Inspect Unit
Inspect unit for transportation damage. File any claim
with transportation agency.
Confirm before installation of unit that voltage, amperage
and circuit protection requirements listed on unit data
plate agree with power supply provided.
Step 4 — Provide Unit Support
Roof Curb Mount —
Accessory roof curb details and dimensions are shown in
Fig. 3. Assemble and install accessory roof curb in
accordance with instructions shipped with the curb.
NOTE: The gasketing of the unit to the roof curb is
critical for a watertight seal. Install gasket supplied with
the roof curb as shown in Fig. 5. Improperly applied
gasket can also result in air leaks and poor unit
performance.
Curb should be level. This is necessary for unit drain to
function properly. Unit leveling tolerances are show in
Fig. 4. Refer to Accessory Roof Curb Installation
Instructions for additional information as required.
Install insulation, cant strips, roofing felt, and counter
flashing as shown. Ductwork must be attached to curb and
not to the unit.
If electric and control wiring is to be routed through the
basepan, attach the accessory thru--the--base service
connections to the basepan in accordance with the
accessory installation instructions.
Slab Mount (Horizontal Units Only) —
Provide a level concrete slab that extends a minimum of
6 in. (150 mm) beyond unit cabinet. Install a gravel apron
in front of condenser coil air inlet to prevent grass and
foliage from obstructing airflow.
NOTE: Horizontal units may be installed on a roof curb
if required.
Alternate Unit Support (In Lieu of Curb or Slab
Mount) —
A non--combustible sleeper rail can be used in the unit curb
support area. If sleeper rails cannot be used, support the long
sides of the unit with a minimum of 3 equally spaced 4--in. x
4--in. (102 mm x 102 mm) pads on each side.
548J*14D

6
C10365
Fig. 3 -- Roof Curb Details
548J*14D

7
A-B
0.5” (13)
B-C
1.0” (25)
A-C
1.0” (25)
MAXIMUM ALLOWABLE
DIFFERENCE IN. (MM)
A
B
C
C10001
Fig. 4 -- Unit Leveling Tolerances
Step 5 — Field Fabricate Ductwork
Cabinet return-air static pressure (a negative condition)
shall not exceed 0.35 in. wg (87 Pa) with economizer or
0.45 in. wg (112 Pa) without economizer.
For vertical ducted applications, secure all ducts to roof curb
and building structure. Do not connect ductwork to unit.
Insulate and weatherproof all external ductwork, joints,
and roof openings with counter flashing and mastic in
accordance with applicable codes.
Ducts passing through unconditioned spaces must be
insulated and covered with a vapor barrier.
If a plenum return is used on a vertical unit, the return
should be ducted through the roof deck to comply with
applicable fire codes.
For Units with Accessory Electric Heaters —
All installations require a minimum clearance to
combustible surfaces of 1--in (25 mm) from duct for first
12--in (305 mm) away from unit.
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in damage
to roofing materials.
Membrane roofs can be cut by sharp sheet metal
edges. Be careful when placing any sheet metal parts
on such roof.
CAUTION
!
Step 6 — Rig and Place Unit
When the unit is ready to be rigged and no longer will be
lifted by a fork truck, the wood protector under the basepan
must be removed. Remove 4 screws from each base rail.
Wood protector will drop to the ground. See instructions on
the unit base rails.
Keep unit upright and do not drop. Spreader bars are
required. Rollers may be used to move unit across a roof.
Level by using unit frame as a reference. See Table 1 and
Fig. 5 for additional information.
Lifting holes are provided in base rails as shown in Fig. 5.
Refer to rigging instructions on unit.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in
equipment damage.
All panels must be in place when rigging. Unit is not
designed for handling by fork truck.
CAUTION
!
Before setting the unit onto the curb, recheck gasketing on
curb.
DETAIL “A”
SEE DETAIL “A”
914 - 1371
( 36” - 54” )
“B”
“A”
“C”
PLACE ALL GASKET IN PLACE BEFORE PLACING
UNIT ON ROOF CURB.
DUCT END
C10281
UNIT MAX WEIGHT DIMENSIONS
A B C
LB KG IN MM IN MM IN MM
548J*14D 2015 916 116.0 2945 55.5 1410 59.5 1510
NOTES:
1. SPREADER BARS REQUIRED — Top damage will occur if spreader bars are not used.
2. Dimensions in ( ) are in millimeters.
3. Hook rigging shackles through holes in base rail, as shown in detail “A.” Holes in base rails are centered around the
unit center of gravity. Use wooden top to prevent rigging straps from damaging unit.
Fig. 5 -- Rigging Details
548J*14D

8
PositioningonCurb—
For full perimeter curbs CRRFCURB072A00 and
073A00, the clearance between the roof curb and the front
and rear base rails should be 1/4in (6.4 mm). The
clearance between the curb and the end base rails should
be 1/2in (13 mm). For retrofit applications with curbs
CRRFCURB003A01 and 4A01, the unit should be
position as shown in Fig. 6. Maintain the 15.5 in (394
mm) and 8 5/8in (220 mm) clearances and allow the
22 5/16 in (567 mm) dimension to float if necessary.
C10003
Fig. 6 -- Retrofit Installation Dimensions
If the alternative condensate drain location through the
bottom of the unit is used in conjunction with a retrofit
curb, the hole in the curb must be moved 12.5 in (320
mm) towards the end of the unit.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
Remove all shipping materials and top skid. Remove extra
center post from the condenser end of the unit so that the
condenser end of the unit matches Fig. 16 -- 18. Recycle
or dispose of all shipping materials.
Step 7 — Convert to Horizontal and Connect
Ductwork (when required)
Unit is shipped in the vertical duct configuration. Unit
without factory--installed economizer or return air smoke
detector option may be field--converted to horizontal
ducted configuration using accessory
CRDUCTCV001A00. To convert to horizontal
configuration, remove screws from side duct opening
covers and remove covers.
Discard the supply duct cover. Install accessory
CRDUCTCV001A00 to cover the vertical supply duct
opening. Use the return duct cover removed from the end
panel to cover the vertical return duct opening.
Field--supplied flanges should be attached to horizontal
duct openings and all ductwork should be secured to the
flanges. Insulate and weatherproof all external ductwork,
joints, and roof or building openings with counter flashing
and mastic in accordance with applicable codes.
Do not cover or obscure visibility to the unit’s informative
data plate when insulating horizontal ductwork.
C06108
Fig. 7 -- Horizontal Conversion Panels
Step 8 — Install Outside Air Hood
Economizer Hood Removal and Setup --
Factory Option —
1. The hood is shipped in knock--down form and located
in the return air compartment. It is attached to the
economizer using two plastic tie--wraps.
2. To gain access to the hood, remove the filter access
panel. (See Fig. 8.)
3. Locate and cut the (2) plastic tie--wraps, being careful
to not damage any wiring. (See Fig. 9.)
4. Carefully lift the hood assembly through the filter
access opening and assemble per the steps outlined in
Economizer Hood and Two–Position Hood on page 10.
FILTER ACCESS PANEL
INDOOR COIL ACCESS PANEL
C10004
Fig. 8 -- Typical Access Panel Locations
548J*14D

9
Economizer
Cut Plastic Ties
(2) Places
Remove Hood Parts
C10005
Fig. 9 -- Economizer Wiring
Two Position Damper Hood Removal and Setup --
Factory Option —
1. The hood is shipped in knock--down form and
assembled to a metal support tray using plastic stretch
wrap. Located in the return air compartment, the
assembly’s metal tray is attached to the basepan and
also attached to the damper using two plastic
tie--wraps.
2. To gain access to the hood, remove the filter access
panel. (See Fig. 8.)
3. Locate the (2) screws holding the metal tray to the
basepan and remove. In order to remove the screws, it
may be necessary to remove the panel underneath the
two--position damper. Remove the two screws. Locate
and cut the (2) plastic tie--wraps securing the
assembly to the damper. (See Fig. 10.) Be careful to
not damage any wiring or cut tie--wraps securing any
wiring.
4. Carefully lift the hood assembly (with metal tray)
through the filter access opening and assemble per the
steps outlined in Economizer Hood and Two–Position
Hood on page 10.
5. If removed, reattach the panel under the damper.
Hood Parts
Plastic Tie Wrap
Qty (2)
Screws for Metal Tray
Qty (2)
C10006
Fig. 10 -- Damper Assembly
548J*14D

10
Economizer Hood and Two--Position Hood —
NOTE: If the power exhaust accessory is to be installed
on the unit, the hood shipped with the unit will not be
used and must be discarded. Save the aluminum filter for
use in the power exhaust hood assembly.
1. The indoor coil access panel will be used as the top of
the hood. If the panel is still attached to the unit, re-
move the screws along the sides and bottom of the
panel. See Fig. 11.
SIDE
PANEL
INDOOR
COIL
ACCESS
PANEL
INDOOR
COIL
ACCESS
PANEL
CAULK
HERE
TOP
PANEL
RAIN DEFLECTORS
C10007
Fig. 11 -- Indoor Coil Access Panel Relocation
2. Swing out indoor coil access panel and insert the
hood sides under the panel (hood top). Be careful not
to lift the panel too far as it might fall out. Use the
screws provided to attach the hood sides to the hood
top. Use screws provided to attach the hood sides to
the unit. See Fig. 12.
TOP
PANEL
INDOOR COIL
ACCESS PANEL
SCREW
HOOD DIVIDER
LEFT
HOOD
SIDE
C10008
Fig. 12 -- Economizer Hood Construction
3. Remove the shipping tape holding the economizer
barometric relief damper in place.
4. Insert the hood divider between the hood sides. See
Fig. 12 and 13. Secure hood divider with 3 screws on
each hood side. The hood divider is also used as the
bottom filter rack for the aluminum filter.
5. Attach the post that separates the filters with the
screws provided.
6. Open the filter clips which are located underneath the
hood top. Insert the aluminum filters into the bottom
filter rack (hood divider). Push the filter into position
past the open filter clips. Close the filter clips to lock
the filters into place. See Fig. 13.
7. Install the two rain deflectors on the edge of the hood
topasshowninFig.11.
DIVIDER
BAROMETRIC
RELIEF
CLEANABLE
ALUMINUM
FILTER
FILTER
HOOD
FILTER
CLIP
OUTSIDE
AIR
C10009
Fig. 13 -- Economizer Filter Installation
8. Caulk the ends of the joint between the unit top panel
and the hood top as shown in Fig. 11.
9. Replace the filter access panel.
Step 9 — Install External Condensate Trap and
Line
The unit has one 3/4-in. condensate drain connection on
the end of the condensate pan and an alternate connection
on the bottom. See Fig. 14. Unit airflow configuration
does not determine which drain connection to use. Either
drain connection can be used with vertical or horizontal
applications.
When using the standard side drain connection, ensure the
red plug in the alternate bottom connection is tight. Do
this before setting the unit in place. The red drain pan can
be tightened with a 1/2--in. square socket drive extension.
To use the alternate bottom drain connection, remove the
red drain plug from the bottom connection (use a 1/2-- i n .
square socket drive extension) and install it in the side
drain connection.
DRAIN
(FACTORY-INSTALLED)
PLUG
CONDENSATE PAN (SIDE VIEW)
STANDARD
SIDE DRAIN
ALTERNATE
BOTTOM DRAIN
C08021
Fig. 14 -- Condensate Drain Pan (Side View)
548J*14D