Electrical Supply Requirements - Quincy QR-25 Series Instruction Manual

CAUTION !

Electrical Supply Requirements

DANGER !
WARNING !
CAUTION !
CAUTION !
QR-25 Series
52201-107, January 2014
and local laws governing acceptable noise levels. Check with local officials for
specifications.
Excessive noise can be effectively reduced through various methods. Total
enclosures, intake silencers, baffle walls, relocating or isolating the compressor
can reduce noise levels. Care must be taken when constructing total enclosures
or baffle walls. If not properly constructed or positioned, they could contribute
to unacceptable noise levels or over heating. Consult your local Quincy Com-
pressor distributor if assis tance is required.
Unusual noise or vibration indicates a problem. Do not operate the
compressor until the source has been identified and corrected.
The electrical installation of this unit must be performed by a qualified electri-
cian in accordance with the National Electrical Code (NEC) or the Canadian
Electrical Code (CEC), the National Electrical Safety Code (NESC), OSHA
and/or state and local codes. Failure to abide by the national, state and local
codes may result in physical harm and/or property damage.
Before installation, the electrical supply must be checked for adequate wire
size and transformer capacity. A suitable circuit breaker or fused disconnect
switch should be provided. When a 3 phase motor is used to drive a compres-
sor, any unreasonable voltage imbalance between the legs must be eliminated
and any low voltage corrected to prevent excessive current draw. Note: This
unit must be grounded.
High voltage may cause personal injury or death. Disconnect and
lockout/tagout per OSHA regulation 1910.147 all electrical power
supplies before opening the electrical enclosure or servic ing.
Never assume a compressor is safe to work on just because it is not
operating. It could restart at any time. Follow all safety precau-
tions outlined in SECTION 5, Stopping For Maintenance.
NEMA electrical enclosures and components must be appropriate
to the area installed.
Overload Relay
An overload relay monitors the compressor motor electrical current and turns
the compressor motor off when an overload is sensed. It is mounted on the
bottom of the motor starter. The overload relay is designed for motors with a
1.15 service factor. The overload relay setting should be adjusted to the mo-
tor nameplate amp rating. If the motor has a service factor rating other than
1.15, the overload relay setting must be adjusted to compensate. Contact your
Quincy distributor for assistance.
Overload relays are designed to protect the motor from damage
due to motor overload. If the overload relay trips persistently, DO
NOT CONTINUE TO PUSH THE RESET BUTTON! Contact your lo-
cal Quincy distributor for assistance.
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Quincy Compressor
3501 Wismann Lane, Quincy IL - 62305-3116