American Dryer Corp. ML-55II - Manual (Page 11)

113345-9 www.amdry.com 9
For added personal safety, when possible, it is suggested
that a separate ground wire (no. 18 minimum) be connected
from the ground connection of the dryer to a grounded cold
water pipe. Do not ground to a gas pipe or hot water pipe.
The grounded cold water pipe must have metal-to-metal
connection all the way to the electrical ground. If there are
any nonmetallic interruptions, such as, a meter, pump, plastic,
rubber, or other insulating connectors, they must be jumped
out with no. 4 copper wire and securely clamped to bare
metal at both ends.
Important
For personal safety and proper operation, the dryer
must be grounded.
Provisions are made for ground connection in each dryer at
the electrical service connection area.
Electrical Connections
A wiring diagram is located inside the control box for
connection data.
If local codes permit, power to the dryer can be made by the
use of a flexible U.L. listed power cord/pigtail (wire size must
conform to rating of dryer), or the dryer can be hard wired
directly to the service breaker panel. In both cases, a strain
relief must be installed where the wiring enters the dryer.
Gas and Steam Models only
Important
A separate protected circuit must be provided to each
dryer.
Single-Phase (1ø) Wiring Connections/Hookup
The electrical input connections on all single-phase (1ø) gas
dryers and steam dryers are made into the rear service box
located at the upper left area of the dryer.
Electrical Service Specifications
Important
Figures shown are for non-reversing models only. For
reversing models contact the factory.
Gas and Steam Models only
11/30/04
* AWG Stranded Wire Type – size wire as per National Electrical Code or
local codes.
** 3-Wire available.
Electric Models Only
All electrically heated dryers must be connected to the electric
service shown on the dryer’s data label. The connecting
wires must be properly sized to handle the rated current.
11/30/04
Grounding
A ground (earth) connection must be provided and installed
in accordance with state and local codes. In the absence of
these codes, grounding must conform to applicable
requirements of the National Electrical Code ANSI/NFPA NO.
70-LATEST EDITION, or in Canada, the installation must
conform to applicable Canada Standards: Canadian Electrical
Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION.
The ground connection may be to a proven earth ground at
the location service panel.
ELECTRICAL SERVICE SPECIFICATIONS (PER DRYER)
MPORTANT:
NOTES: A.
B.
C.
208 VAC and 240 VAC ARE NOT THE SAME. When ordering,
specify exact voltage .
When fuses are used they must be dual element, time delay, current
limiting, class RK1 or RK5 ONLY. Calculate/determine correct fuse
value, by applying either local and/or National Electrical Codes to listed
appliance amp draw data.
Circuit breakers are thermal-magnetic (industrial) motor curve type
ONLY. For others, calculate/verify correct breaker size according to
appliance amp draw rating and type of breaker used.
Circuit breakers for 3-phase (3Ø) dryers must be 3-pole type.
SERVICE
VOLTAGE
PHASE
WIRE
SERVICE
APPROX.
AMP DRAW
MINIMUM
WIRE SIZE
CIRCUIT
BREAKER
60 Hz 50 Hz
120 1ш 2 12 --- * 20
208 1ш 2 7.1 --- * 15
240 1ш 2 6.5 4.8 * 15
208 3ш 3 3.3 --- * 15
240 3ш 3 3.1 3.5 * 15
380/400 3ш 4** --- 2.2 * 15
416 3ш 4** --- 2.3 * 15
460/480 3ш 3 2.1 --- * 15
!
!
!
ELECTRICAL SERVICE SPECIFICATIONS (PER DRYER)
IMPORTANT:
NOTES: A.
B.
C.
208 VAC AND 240 VAC ARE NOT THE SAME . When
ordering, specify exact voltage.
When fuses are used they must be dual element, time
delay, current limiting, class RK1 or RK5 ONLY.
Calculate/determine correct fuse value, by applying either
local and/or National Electrical Codes to listed appliance
amp draw data.
Circuit breakers are thermal-magnetic (industrial) type
ONLY. For others, calculate/verify correct breaker size
according to appliance amp draw rating and type of breaker
used.
Circuit breakers for 3-phase (3ø) dryers must be 3-pole
type.
SERVICE
VOLTAGE
PHASE
WIRE
SERVICE
APPROX.
AMP DRAW
CIRCUIT
BREAKER
60 Hz 50 Hz
20 kW ELECTRIC
208 1ш 2 103 – 125
240 1ш 2 90 88 125
30 kW ELECTRIC
208 3ш 3 90 – 125
240 3ш 3 79 77 100
480 3ш 3 38 – 50