Install Manual

Page 40
mrcool.com
Maintenance
Initial safety checks should include:
1. The safe discharge of capacitors to avoid the possibility of sparking.
2. Ensure that no live electrical components and wiring are exposed while charging, recovering, or purging
the system.
3. Ensure that the system is securely and safely grounded.
Electrical Device Checks
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 of components 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 & HVAC code requirements. The location of the disconnect box(es), number of disconnect
box(es) 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 codes. 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 components 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.