Chromalox MicroTherm, Руководство по установке и эксплуатации

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10
ELECTRIC SHOCK AND BURN HAZARD. Discon-
nect all power before servicing or performing
maintenance to the system. Do not attempt to
service system while it is operating or while
hot. Failure to comply can result in:
a. Electric shock.
b. Burns from hot heating elements, piping,
and hot oil or water.
c. Injury from operating or rotating pump and
motor.
Maintenance is to be performed by qualified
personnel only. Thoroughly read and under-
stand these instructions. Consult the factory if
you have any questions.
Take Out of Service
To take the unit out of service, the following steps must
be done in sequence:
1. Set the temperature controller setpoint to 90°F or
lower. Allow to cool.
2. Turn off power to the unit. The controller will turn
off.
3. Turn off the water supply to the unit.
4. Disconnect electrical supply to the unit.
5. Drain the system.
6. If it is exposed to freezing temperatures while out
of service, remove water by blowing air through
cooling pipe. You will need to open the cooling
valve by turning on manual cooling or removing it.
Heater Removal/Replacement
ELECTRIC SHOCK HAZARD. Disconnect all
power to system before servicing. Failure to
comply can result in personal injury or equip-
ment damage.
BURN HAZARD. Never service system while
hot. Allow system to cool to room temperature
before servicing.
1. Check that power is disconnected from the system
and remove wiring to heater.
2. Disconnect thermocouple from control cabinet.
3. Drain heater and pump.
4. Remove bolts on heater and undo fittings on pipe.
Remove heater through the front door.
5. Install new heater and retighten all bolts and fit-
tings.
6. Put all sheet metal back in place and retighten
screws.
7. Refill system and follow operation procedure in
Section 4.
Leaks
1. Leaks should be minimized.
2. CAUTION: Hazard of Fire. Some heat transfer flu-
ids are flammable and if allowed to leak on hot
pipes or in fibrous thermal insulation, a fire hazard
can be created.
3. Disassemble, clean and reseal the connections us-
ing high temperature sealant. (Do not use TFE or
other tape.) Sealants are to be rated for tempera-
tures and fluids used in the system.
ELECTRIC SHOCK HAZARD. Close the front
electrical enclosure door and retighten the
locking screw. This must be done to limit ac-
cess to high voltage components. Failure to
comply could result in personal injury or equip-
ment damage.
Section 6 – Maintenance