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Page 40
mrcool.com
Maintenance
Initial safety checks should include:
1. Safe discharge of capacitors to avoid the possibility of sparking.
2. No live electrical components and wiring should be exposed while charging, recovering, or purging
the system.
3. The system is safely grounded.
Electrical Device Checks (cont.)
DO NOT apply any permanent inductive or capacitance loads to the circuit without first ensuring
that this will not exceed the permissible voltage and current permitted for the equipment in use.
1. Intrinsically safe components are the only types that can be worked on while live in the presence of a
flammable atmosphere. The test apparatus must be at the correct rating.
2. Replace components only with parts specified by the manufacturer. Other parts may result in the ignition of
refrigerant in the atmosphere from a leak.
Intrinsically Safe Component Repair
Sealed Component Repairs
ELECTRICAL SAFETY
Ensure that this system is installed using a disconnect box that meets national, state, and local electrical
and HVAC code requirements. The location of the disconnect box(es), number of disconnect boxes
needed, and distance from the unit(s) to the disconnect box(es) should be handled in accordance with
national, state, and local electrical and HVAC code. Also ensure that there is a permanent form of leak
detection, at the most critical point to warn of a potentially hazardous situation.
ATTENTION
• Electrical component casings should not be altered in such a way that the level of protection is
affected. This includes damage to cables, excessive number of connections, terminals not made to
original specification, damage to seals, incorrect fitting of glands, etc.
• Ensure the apparatus is securely mounted.
• Ensure the seals or sealing materials have not degraded in such a way that they no longer serve the
purpose of preventing the ingress of flammable atmospheres.
• Replacement parts should be in accordance with manufacturer specifications.
NOTICE
• The use of silicon sealant may inhibit the effectiveness of some types of leak detection equipment.
• Intrinsically safe components do not have to be isolated prior to working on them.
Notice on Maintenance
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