Carrier 48HJD005-007 - Manual
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Table of Contents:
- Page 3 – MAXIMUM ALLOWABLE; Fig. 2 — Unit Leveling Tolerances; Fig. 3 — Condensate Drain Pan
- Page 4 – Fig. 4 — Rigging Details
- Page 5 – Table 1 — Physical Data
- Page 6 – Table 1 — Physical Data (cont)
- Page 8 – Step 8 — Adjust Factory-Installed Options; Fig. 7 — Gas Piping Guide (With Accessory; SPACING OF SUPPORTS; NFGC —; STEEL PIPE; Fig. 6 — Flue Hood Details
- Page 9 – Fig. 8 — Power Wiring Connections
- Page 12 – Fig. 11 — Accessory Field-Installed Humidistat
- Page 13 – Fig. 15 — Durablade Economizer Installed in Unit
- Page 15 – Fig. 22 — Durablade Economizer Barometric; Fig. 23 — Economizer Component Locations
- Page 16 – Fig. 27 — Completed Hood Assembly; OAT
- Page 17 – OR; Fig. 33 — Typical Access Panel Locations
- Page 18 – Fig. 36 — Barometric Relief Capacity
- Page 19 – Step 9 — Adjust Evaporator-Fan Speed —; Fig. 38 — Evaporator-Fan Pulley Adjustment
- Page 30 – Table 28 — Altitude Compensation*; Heating
- Page 32 – Fig. 39 — MoistureMiser Option Operation
- Page 33 – Fig. 40 — Cleaning Condenser Coil
- Page 37 – Burner Ignition —; Table 29 — LED Error Code Description*; Main Burners —; Fig. 52 — Burner Section Details
- Page 38 – Fig. 54 — Spark Gap Adjustment; LOW HEAT
- Page 39 – TROUBLESHOOTING; Refer to Tables 30-36 for troubleshooting details.; Table 30 — LED Error Code Service Analysis; SYMPTOM
- Page 42 – Subcooler will not deenergize.
- Page 43 – Table 36 — Cooling Service Analysis
- Page 45 – LEGEND AND NOTES FOR FIG. 55
- Page 48 – I. PRELIMINARY INFORMATION; ELECTRICAL
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Catalog No. 534-767
Printed in U.S.A.
Form 48HJ-18SI
Pg 1
9-00
Replaces: 48HJ-17SI
Book 1
4
Tab
1a 6a
Installation, Star t-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS
. . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
Step 1 — Provide Unit Support
. . . . . . . . . . . . . . . . . . . 1
• ROOF CURB
• SLAB MOUNT
Step 2 — Field Fabricate Ductwork
. . . . . . . . . . . . . . . 3
Step 3 — Install External Trap for
Condensate Drain
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Step 4 — Rig and Place Unit
. . . . . . . . . . . . . . . . . . . . . 3
• POSITIONING
Step 5 — Install Flue Hood
. . . . . . . . . . . . . . . . . . . . . . . 4
Step 6 — Install Gas Piping
. . . . . . . . . . . . . . . . . . . . . . 4
Step 7 — Make Electrical Connections
. . . . . . . . . . . 4
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
• HEAT ANTICIPATOR SETTINGS
Step 8 — Adjust Factory-Installed Options
. . . . . . . 8
• MOISTUREMISER DEHUMIDIFCATION
PACKAGE
• APOLLO CONTROL
• DISCONNECT SWITCH
• OPTIONAL DURABLADE ECONOMIZER
• OPTIONAL ECONOMI$ER
Step 9 — Adjust Evaporator-Fan Speed
. . . . . . . . . 19
• BELT-DRIVE MOTORS
PRE-START-UP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
START-UP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-32
SERVICE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-38
TROUBLESHOOTING
. . . . . . . . . . . . . . . . . . . . . . . . . 39-45
START-UP CHECKLIST
. . . . . . . . . . . . . . . . . . . . . . . . CL-1
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical compo-
nents. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance func-
tions of cleaning coils and filters and replacing filters. All other
operations should be performed by trained service personnel.
When working on air-conditioning equipment, observe precau-
tions in the literature, tags and labels attached to the unit, and
other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations. Have
fire extinguishers available for all brazing operations.
INSTALLATION
Unit is shipped in the vertical discharge configuration. To
convert to horizontal discharge application, remove duct open-
ing covers. Using the same screws, install covers on duct open-
ings in basepan of unit with insulation-side down. Seals around
openings must be tight.
NOTE: Any combination of supply and return ducting is per-
missible, i.e., vertical supply combined with horizontal return.
Step 1 — Provide Unit Support
ROOF CURB — Assemble and install accessory roof curb in
accordance with instructions shipped with curb. See Fig. 1. In-
stall insulation, cant strips, roofing felt, and counter flashing as
shown. Ductwork must be attached to curb, not to the unit.
If electric control power or gas service is to be routed through
the basepan, attach the accessory thru-the-bottom service con-
nections to the basepan in accordance with the accessory instal-
lation instructions. Connections must be installed before unit is
set on roof curb.
Curb should be level. Unit leveling tolerances are shown in
Fig. 2. This is necessary for unit drain to function properly. Re-
fer to Accessory Roof Curb Installation Instructions for addi-
tional information as required.
SLAB MOUNT (Horizontal Units Only) — Provide a level
concrete slab that extends a minimum of 6 in. beyond unit cab-
inet. 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.
Before performing service or maintenance operations on
unit, turn off main power switch to unit and install lockout
tag. Ensure electrical service to rooftop unit agrees with
voltage and amperage listed on the unit rating plate. Elec-
trical shock could cause personal injury.
Disconnect gas piping from unit when leak
testing at pressure greater than
1
/
2
psig. Pres-
sures greater than
1
/
2
psig will cause gas valve
damage resulting in hazardous condition. If
gas valve is subjected to pressure greater than
1
/
2
psig, it must be replaced before use. When
pressure testing field-supplied gas piping at
pressures of
1
/
2
psig or less, a unit connected
to such piping must be isolated by manually
closing the gas valve(s).
IMPORTANT: 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. 1. Improperly
applied gasket can result in air leaks and poor unit
performance.
48HJD005-007, 48HJE/HJF004-007
48HJL/HJM/HJN/HJG/HJH/HJK004-006 (LOW NO
x
)
Single-Package Rooftop Heating/Cooling
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Summary
3 Step 2 — Field Fabricate Ductwork — Secure all ducts to roof curb and building structure on vertical dischargeunits. Do not connect ductwork to unit. For horizontal applica-tions, field-supplied isolation flanges should be attached to hor-izontal discharge openings and all ductwork should be secur...
4 Step 5 — Install Flue Hood — Flue hood is shipped screwed to the burner compartment access panel. Removefrom shipping location and, using screws provided, install fluehood in location shown in Fig. 5 and 6. For units being installed in California Air Quality Manage- ment Districts which require NO...
5 Table 1 — Physical Data LEGEND *Single phase/three phase. †Indicates automatic reset. **48HJD005-007 and 48HJE004 (72,000 Btuh heat input) units have 2 burners. 48HJE005-007 and 48HJF004 (115,000 Btuh heat input) units and 48HJF005-007 (150,000 Btuh Heat input) units have 3 burners. ††An LP kit is...
