MI L-H-80045B
The system shall be designed so that any moisture appearing on the water
cooled components as the result of condensation shall be disposed of in
such a manner as not to be detrimental to proper functioning of the heater.
All seals, gaskets, connections, tubing, and hoses shall be constructed of
heavy duty material, designed and installed to prevent leakage. The air
cooling system shall maintain positive pressure inside the cabinet or shall
be a self-cooled totally enclosed system as specified in 3.5.11. The
system shall provide sufficient air circulation for adequate cooling of
all air cooled components when operating at full rated power. When speci-
fied (see 6.2.1), each heater shall be equipped with a self-contained
closed water cooling system utilizing a water to water heat exchanger
suitable for use with water supplied from a storage tank, plant, or city
water system. The cooling system shall be adequate for cooling the unit
when operating under "usual service conditions" as defined in IEEE Standard
No. 54.
3.5.11 Cabinet and chassis. The cabinet shall be of aluminum or steel
frame and panel construction. The gage of the metal and the physical
strength of the cabinet and chassis, shall be adequate for support and
protection of all components. The cabinet shall be constructed for
minimum radiation of RF power. The cabinet shall be designed for opera-
tion with sufficient positive internal air pressure to assure that outside
air is brought in only through a replaceable type air filter or shall be
totally enclosed, self-cooled, not requiring ventilation.
3.5.12 Suppression of radio frequency radiation. Design and construction
of the RF generating and radiating circuits shall provide the necessary
harmonic suppression, shielding, and filtering to prevent radiation inten-
sity in excess of that permitted by FCC Rules and Regulations, Volume II,
Part 18.
3.5.13 Moisture and fungus-resistant treatment. When required (see
6.2.1), fungus and moisture resistant treatment shall be as specified.
3.6 Size and capacity. The Type I heaters shall be low power output
heaters, and normally are designed for mounting and operating on a work
bench. The Type II heaters shall be either low or high power heaters that
are built in floor mounted cabinets. The size numbers designate the RF
power output of the heaters in kilowatts.
3.7 Electrical input power and equipment requirements. The heaters
shall be designed for operation from the alternating current (AC) power
source specified (see 6.2.1). All three phase heaters shall be designed
for three wire, three phase input. Performance shall be in accordance
with requirements specified herein, with an input voltage variation of
plus or minus 5 percent of rated input voltage. All electrical components
including starters, relays, and switches shall have a rated continuous
8
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business