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User's Information and Maintenance Manual
CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
MAINTENANCE ACCESS . . . . . . . . . . . . . . . . . . . . . . 3
Access Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Control/Power Box . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Access Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
ROUTINE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . 6
Monthly Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Cooling Season Start-Up . . . . . . . . . . . . . . . . . . . . . . 6
Heating Season Start-Up . . . . . . . . . . . . . . . . . . . . . . 6
MAINTENANCE INSTRUCTIONS . . . . . . . . . . . . . . . . 6
Pre-Indoor Coil Filter . . . . . . . . . . . . . . . . . . . . . . . . . 6
Outdoor Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Indoor Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Indoor Fan System . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electric Heating System . . . . . . . . . . . . . . . . . . . . . . 12
Outdoor Intake and Relief . . . . . . . . . . . . . . . . . . . . 12
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . 12
Refrigerant Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Ultra-Violet Light System . . . . . . . . . . . . . . . . . . . . . 13
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500486-01
WeatherMaker
Rooftop Units with Puron Advance
Printed in U.S.A.
Form No. 50K-1SO
®
50K 20-60 Electric Cooling Applied
(R-454B) and Carrier SmartVu
with PIC 6.1 Hardware and Software 2.X
Page
This manual should be left with the equipment owner.
This user's guide provides information on maintaining Carrier
50K Series applied rooftop units to ensure reliable and efficient
operation. Equipment maintenance should only be performed by
qualified personnel. Use proper safety equipment when maintain-
ing equipment and follow codes, regulations, and safety guide-
lines. Refer to the Advanced Controls, Operation, and Trouble-
shooting Guide for equipment troubleshooting and service
instructions.
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, mainte-
nance, or use can cause explosion, fire, electrical shock, or
other conditions which may cause death, 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 indi-
vidual instructions packaged with the kits or accessories when
installing.
Follow all safety codes. Wear safety glasses, protective cloth-
ing, and work gloves. Have a fire extinguisher available. Read
these instructions thoroughly and follow all warnings or cau-
tions included in literature and attached to the unit. Affix any
labels that ship with the unit or accessory installation instruc-
tions to the unit. Consult local building codes, and the current
editions of the National Electrical Code (NEC)/National Fire
Protection Association (NFPA) 70.
In Canada refer to the current editions of the Canadian Electrical
Code (CEC) CSA C22.1.
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. Under-
stand the signal words DANGER, WARNING, and CAU-
TION. 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 haz-
ards 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 installa-
tion, reliability, or operation.
™
Refrigerant
NOTE TO INSTALLER
GENERAL
Pg 1
7-25
™
Controls
Replaces: NEW
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Related Manuals for Carrier WeatherMaker 50K
Summary of Contents for Carrier WeatherMaker 50K
-
Page 1: Table Of Contents
MAINTENANCE ACCESS ..... . 3 This user’s guide provides information on maintaining Carrier 50K Series applied rooftop units to ensure reliable and efficient Access Doors . - Page 2 SYMBOL CODE MEANING WARNING ELECTRICAL SHOCK HAZZARD Failure to follow this warning could result in personal injury or GHS02: Flammable Flammable gas death. Before performing installation, service, or maintenance on this unit, turn off the main power disconnect to the unit and install lock and lockout tag.
-
Page 3: Maintenance Access
CAUTION AVERTISSEMENT All possible ignition sources, including cigarette smoking, Toutes les sources d'inflammation possibles, y compris la must be kept sufficiently far away from the site of work. This fumée de cigarette, doivent être maintenues suffisamment loin includes, but is not limited to, installation, repair, removal, and du lieu de travail. - Page 4 Compressor Access Door Indoor Fan Motor Access Door Condensate Drain Connection Outdoor Air Screens Filter/Indoor Coil Access Door Exhaust/Relief Hoods Fig. 2 — 50K Front Maintenance Access (Size 20-34 Shown) EXV Access Panel Indoor Fans Economizer Indoor Coil Damper SmartVu Touchscreen Interface UV View Port...
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Page 5: Access Doors
Access Doors After performing any maintenance or service on the unit, verify that all access doors are secured and that all door gaskets are in place to prevent water and air leaks. ACCESS DOOR LATCH All airside panels include three paddle flaps with latch bolts. Use a 7/16 wrench or socket to loosen all the latch bolts and rotate the paddle flat 90 degrees to allow the door to open. -
Page 6: Routine Maintenance
ROUTINE MAINTENANCE Heating Season Start-Up In addition to the quarterly inspection items, these items should be The following items should be part of a routine maintenance pro- checked at the beginning of each heating season (or more often if gram. These parts should be checked 30 days after initial unit op- local conditions and usage patterns dictate an extended heating eration and then again, every one to two months, until a specific season):... -
Page 7: Filter Replacement
Line up the top hole in the filter access cover with the top Follow steps 1-4 outlined in section “FILTER INSPEC- TION” on page 6, to access the filter rack. thumbscrew nut in the side panel. Slide the black filter clip outward to remove it from the filter While holding the cover in place, insert the top thumbscrew. -
Page 8: Filter Change Reminder
FILTER CHANGE REMINDER The SmartVu control can be configured to set a filter change re- minder alert based on filter hours or based on a filter status switch (factory-installed or field-installed accessory). Refer to the unit installation instructions for directions on chang- ing the alert type (hours or status switch) and on adjusting the filter status switch trigger point. -
Page 9: Indoor Coils
Follow coil cleaner manufacturer’s directions for cleaner prepara- INDOOR COILS CLEANING tion and coil cleaning. When rinsing does not clean the coil of grease or other contami- nants, chemical coil cleaning is recommended. Elimination of IMPORTANT: Do not use acid or coil brighteners to clean the contamination and removal of harmful residues will greatly coil. -
Page 10: Belt Replacement
BELT REPLACEMENT INSPECT FAN AND MOTORS SHEAVES Disconnect unit power, lock-out/tag-out. Inspect the fan and motor sheaves for excessive wear. Turn fan sheaves while inspecting sheaves. Replace as necessary. Check Loosen motor mounting nuts and bolts. See Fig.11 for nut sheave alignment using a straightedge and adjust as necessary. -
Page 11: Inspect Fan Shaft Bearings
INSPECT FAN SHAFT BEARINGS Use a hand grease gun to install lubricant using the 1/4 in. grease fitting on the top of the bearing and coupler. Turn the fan shaft Inspect the fan shaft bearings and coupler (60 ton units only) to while lubricating. -
Page 12: Electric Heating System
Navigate to the Start/Stop screen and set the unit to Enable by Electric Heating System pressing the Enable button, to restore normal operation, or press Disable to keep the unit disabled. WARNING Outdoor Intake and Relief ELECTRICAL SHOCK HAZARD OUTDOOR AIR SCREENS Failure to follow this warning could result in personal injury or death. -
Page 13: Compressors
COMPRESSORS Navigate to the Start/Stop screen press the Component Test button to enable component test operation. The compressors are accessed through the compressor access door. Refer to Fig. 2 for compressor locations. Inspect the com- Press the test button on the A2L leak dissipation board for 1 pressors for any signs of damage or leaks. - Page 14 Detail A Detail B Detail A — Test Button Detail B — Status LED Fig. 16 — A2L Dissipation Board Details...
- Page 16 © 2025 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500486-01 Printed in U.S.A. Form No. 50K-1SO Pg 16 7-25 Replaces: NEW...
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