Safety
Instructions
Product
Description
Installat
io
n
Electrical
Connection
Starting up &
Operation
Maintenance
& Repair
Dismantling &
Disposal
Condensing Unit For Refrigeration Networks
4
Starting up & Operation
4.1 Charging
Procedure
It is recommended to charge the unit with refrigerant into the receiver, via the Rotalock
service valve.
4.2 Sound
Sound data is given in the Copeland Selection software, available on
www.eCopeland.com.
The value published is the A-weighted average sound pressure level at 10 metres, with a
free sound propagation.
You can calculate the sound pressure for a further distance by using the following
formula:
LPA
d
= LPA
1m
-20 Log (d)
LPA
d
=
A-weighted sound pressure level at a "d" distance
LPA
1m
= A-weighted sound pressure level at 1 metre
D = distance
The sound pressure values measured on the field might be slightly different from the
published value due to the surrounding, different room characteristics, reverberating
object or walls, etc.
The unit must be installed without restricting the airflow.
All sound levels stated are with condenser fan(s) running at full speed. During reduced
ambient temperatures if optional fan speed controller is operating, lower sound levels will
be achieved.
4.3 Rotation direction of scroll compressors
Scroll compressors, like several other types of compressors, will only compress in one
rotational direction. Direction of rotation is not an issue with single-phase compressors
since they will always start and run in the proper direction. Three-phase compressors will
rotate in either direction depending upon phasing of the power. Since there is a 50-50
chance of connecting power in such a way as to cause rotation in the reverse direction,
it
is important to include notices and instructions in appropriate locations on the
equipment to ensure proper rotation direction when the system is installed and
operated.
4.3.1 Units OMQ-56, OMQ-75, OMQ-92, OMQ-110, OLQ-24V, OLQ-33V, OLQ-40V &
OLQ-48V
Compressors assembled on above units are equipped with the INT69SCY module, which
acts as internal protection and checks the phasing. The module will trip in case of reverse
rotation.
4.3.2 Units OMTQ-60(D), OMTQ-76, OMTQ-90(D), OLTQ-26V & OLTQ-36V
Please follow the underneath procedure:
Observing that suction pressure drops and discharge pressure rises when the
compressor is energized makes verification of proper rotation direction possible. There is
no negative impact on durability caused by operating three-phase Copeland Scroll™
compressors in the reversed direction for a short period of time (less than one hour), but
oil may be lost. After several minutes of operation in reverse, the compressor's protection
system will trip due to high motor temperature. However, if allowed to repeatedly restart
and run in reverse without correcting the situation, the compressor will be permanently
damaged.
All three-phase scroll compressors are identically wired internally. Therefore, once the
correct phasing is determined for a specific system or installation, connecting properly
phased power leads to the identified terminals in the electrical panel will insure proper
rotation direction.
C6.1.4/0305/E
31
Part no: 3136433
