Specifications

Simplex, Inc., 5300 Rising Moon Road, Springfi eld, IL 62711-6228 • 217-483-1600 • Fax [phone]
Merlin-150-300c.indd • © 2011 Simplex, Inc. All Rights Reserved. • Printed in the USA. • www.simplexdirect.com
LOAD BANK MANUAL • Merlin 150-300 Load Bank • page 5 of 15
OPERATION
1. Confirm the test source
is properly grounded and
ground the Load Bank to its
own independent ground.
2. Confi rm the “Control Power”
circuit breaker (FCB) is in the
“Off” position.
3. See Control Section Drawing:
a. Using the cables provided,
connect the load source to
the Load Bank as shown.
b. If external control power
is desired, place the Ex-
ternal Fan Control Power
Plug into a 120V, 1ø,
60Hz, 15A receptacle.
4. Place the “Control Power
Selector” switch and “Volt-
age Selector” switch in the
appropriate positions.
5. Start-up generator set or bring other
test source on line.
If External Control Power is being
used, place the “Control Power” cir-
cuit breaker to energize the cooling
fan before starting the generator to
assure proper fan operation (Step
7).
6. Adjust power source voltage and
frequency.
7. Place the “Control Power” circuit
breaker (FCB) in the “On” position
to energize the cooling fan.
A false “Cooling Failure” lamp indica-
tion will be present until the cooling
fan creates suffi cient airfl ow to close
the Fan Pressure Switch (PS) and
the “Alarm Reset” pushbutton is
pressed (Step 9).
8. Visually observe correct fan opera-
tion and investigate any unusual fan
related noises.
9. Check air intake for obstructions
and confi rm positive air fl ow.
10. Press the “Alarm Reset” pushbut-
ton.
11. Verify the “Cooling Failure” lamp is
extinguished before proceeding.
When the “Cooling Failure” lamp
extinguishes, control power is sup-
plied to the “Master Load” switch.
12. Select the desired load steps by
placing them in the “On” position.
13. Place the “Master Load” switch in
the “On” position.
This simultaneously applies all of
the load steps which are in the “On”
position.
Trim is achieved by fl ipping the
load steps “On” and “Off” while the
“Master Load” is in the “On” position.
14. Adjust source voltage and load.
Monitor as needed.
Part of Typical Control Section Drawing