Carrier 50BK - Manual

Number One
AirConditbning
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^^2 Division of
Carrier Corporation
Carrier Parkway • Syracus N Y 13221
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Single-Package Cooling Units
SAFETY CONSIDERATIONS
The 50BJ,BK Single-Package Cooling Units
are designed to provide safe and reliable service
when
operated within design specifications.
However, due to system pressures, electrical
components and equipment location, some
aspects of installation, start-up and servicing
of this equipment can be hazardous.
Only trained, qualified installers and service
mechanics should install, start up and service
this equipment.
When working on this equipment, observe
all precautions on tags or labels attached to
the unit, safety notes in the literature and any
other safety precautions that apply.
• Follow all safety codes.
• Wear safety glasses and work gloves.
• Use care in handling, rigging and placing
bulky equipment.
A DANGER
NEVER reach into unit while fan is running.
LOCK OPEN AND TAG fan motor power
disconnect before working on a fan. Remove
the fuses and take them with you after noting
this on tag.
A WARNING
CHECK assembly and component weights to
be sure rigging equipment can handle them
safely.
Note also any specific rigging
instructions.
WHEN STEAM CLEANING COILS, be sure
area is clear of personnel.
CONTENTS
Page
SAFETY CONSIDERATIONS ....................................... 1
INSTALLATION .............................................................1-13
General .............................................................................. 1
Step 1 — Receive and Inspect Unit ...........................2
Step 2 — Protect Unit From Damage ... 2
Step 3 — Provide Unit Support .................................. 2
© Carrier Corporation 1983
Step 4 — Rig and Place Unit with
Accessories ...........................................................2
Step 5 — Position Fan Section As
Desired .................................................................. 2
Step 6 — Install Fan Motor ...................................... 5
Step 7 — Route Fan Motor Wire ............................. 6
Step 8 — Align Fan Shaft and
Wheel______ 6
Step 9 — Install Field-Fabricated
Ductwork ............................................................... 8
Step 10 — Check Return Air Filters ....................... 9
Step 11 — Check Compressor Spring
Mounts ...................................................................9
Step 12 — Make Condenser
Connections..........................................................9
Step 13 — Install Unit Drain Line .......................... 11
Step 14 — Make Electrical
Connections....................................................... 12
START-UP ............................................................ 14,15
General ..................................................................... 14
Prior to Unit Start .................................................... 14
Control Sequence Checkout .................................. 14
SERVICE ...............................................................15-17
Fan Rotation ............................................................ 15
Indoor-Air Fan Adjustment................................... 15
Lubrication .............................................................. 16
Return-Air Filters .................................................... 16
Condensate Drains ................................................. 16
Evaporator Coil...................................................... 17
Water-Cooled Condenser(s) .................................. 17
Air-Cooled Condensers .......................................... 17
Sight Glasses .......................................................... 17
Charging the System .............................................. 17
Indoor-Air Fan Motor Removal .............................. 17
Pressure Relief Devices ......................................... 17
Crankcase Heaters................................................. 17
High and Low Pressure Switches........................ 17
Time Guard® Control Circuit ................... 17
CONTROL SEQUENCE ........................................... 18
INSTALLATION
General — The 50BJ water-cooled condenser type
units and the 50BK condenserless units are single­
package, vertical air conditioning units designed
specifically for application with 35B Modubox and
37A Moduline® variable volume air terminals. For
air terminal installation and service refer to the
separate 35B and 37A installation booklets.
Form 50BJ,BK-4SI