Mr
S
team CU Series
Installation, Operating & Maintenance Manual
24
Maintenance Instructions
To establish a good preventive maintenance program, we suggest that the site equipment foreman, engineer or
owner/operator familiarize themselves with these guidelines:
1. Daily blowdown
at max 5 PSIG operating pressure is recommended for best steambath generator
performance. In order to safeguard the heating element(s) within the steambath generator, the main wall
switch and the steambath generator switch shall both be placed in the OFF position
prior to blowing down
the generator
. Blowdown instruction should then be followed as outlined in this manual.
Do not
use chemical
cleaning compounds in the steambath generator since the chemical agents may damage some of the generator
components. A daily blowdown will assist in prolonging product operation.
2.
Only after electric power supplies have been disconnected at main disconnect switch,
a
monthly
inspection
should be made of all wiring. All electrical connections should be checked for tightness. A check
for steam and/or water leaks should be made and any loose fittings must be tightened immediately. Check heating
element flange bolts for tightness. Specific torque in 22 Ft. lbs. cold.
3.
In hard water areas
, generators equipped with the McDonnell-Miller control (Models CU-2000 and
larger), should be checked for proper operation
every four months or sooner
. At the same time, a bottom
heating element should be removed and inspected. If scale has begun to form, all elements should be cleaned and
re-installed, using only new gaskets and bolts. The pressure control should also be removed to insure that the
bellows has not become clogged. (See trouble-shooting guide for instructions.) Check valves should be inspected
for leakage and proper operation.
4.
Generators equipped with level probes (Models CU 2000 - CU 1400) for maintaining operating water level and
probe for auxiliary low water cut-off protection need special consideration. In hard water areas, the probe
should be checked for chemical deposits and cleaned if necessary. This should be done every
four months or
sooner
. See the trouble-shooting manual for instructions.
Under any circumstances,
only qualified service personnel should attempt the above
procedures. Always insure all electrical power supplies are disconnected at the main disconnect
switches to prevent electric shock. Always insure that pressure within steam generator is 0 PSIG (zero pressure)
whenever plumbing connections, including any factory-plumbed components, are being disconnected.
!
CAUTION
