Installation
OAU-SVX01H-EN
31
temperature during the “Off” cycle to reduce oil foaming
during compressor starts. Oil foaming occurs when
refrigerant condenses in the compressor and mixes with
the oil. In lower ambient conditions, refrigerant migration
to the compressor could increase.
When the compressor starts, the sudden reduction in
crankcase pressure causes the liquid refrigerant to boil
rapidly causing the oil to foam. This condition could
damage compressor bearings due to reduced lubrication
and could cause compressor mechanical failures.
Before initial start up, or if main power has been off for an
extended period of time, compressor crankcase heater(s)
should be operated for a minimum of 8 hours prior to
compressor operation. With main power OFF, remove
jumper between OAUTS terminals 9 and 10 (E-Stop). Turn
main power to energize crankcase heater(s). At end of
warm up period turn main power off, install 9-10 jumper,
turn main power on, and resume normal operation.
Following crankcase heater warm-up, turn main power
disconnect off, and install jumper on E-Stop terminals 9
and 10.
Turn Main disconnect “On”.
Main Unit Display and ReliaTel Controls
When first powered “On”, the controls perform self-
diagnostic initialization to check that all internal controls
are functional. The Status LED located on the Main Unit
Display and the Liteport LED located on the RTRM module
is turned “On” within one second of power-up if internal
operation is okay.
Field-Installed Control Wiring
An overall layout of the various control options available
with the required number of conductors for each control
device is illustrated in
Note:
All field wiring must conform to NEC guidelines as
well as state and local codes.
Control Power Transformer
The 24-volt control power transformers are to be used only
with the accessories called out in this manual.
Transformers rated greater than 50 VA are equipped with
internal circuit breakers. If a circuit breaker trips, turn “Off”
all power to the unit before attempting to reset it.
The transformers are located in the control panel. The
circuit breaker is located on the left side of the
transformers and can be reset by pressing in on the black
reset button.
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury. All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes.
AVERTISSEMENT
Câblage sur site et mise à la terre corrects
nécessaires !
Le non-respect de la réglementation peut entraîner des
blessures graves, voire mortelles. Il est IMPÉRATIF de
confier l’ensemble du câblage sur site à un électricien
qualifié. Un câblage sur site mal installé ou mal mis à la
terre constitue des risques D’INCENDIE et
D’ÉLECTROCUTION. Pour éviter ces risques, il est
IMPÉRATIF de respecter les obligations en matière de
pose de câblage sur site et de mise à la terre tel que
stipulé dans les règles du NEC et dans les
réglementations électriques locales/nationales.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized.Verify that no
power is present with a voltmeter.
AVERTISSEMENT
Risque d’électrocution !
Le non-respect de cette consigne peut entraîner des
blessures graves, voire mortelles. Avant toute
intervention, coupez l’alimentation électrique, y
compris aux sectionneurs à distance. Suivez
scrupuleusement les procédures de verrouillage/mise
hors service préconisées pour empêcher tout
rétablissement accidentel de l’alimentation électrique.
