Tecumseh Argus, Руководство по установке

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13
Remote Condensing Unit Installation Instructions
©2019 Tecumseh Compressor Company LLC. All rights reserved. TPC Part #71511 | Rev A 05/13/2019 www.tecumseh.com
Electric Defrost Troubleshooting
The electric defrost units are relatively simple and trouble-free in operation:
Timer
If the system does not go through its proper sequence check timer operation through a defrost cycle. Check for
loose wires or terminals. Before replacing timer, check other components.
Operation of Paragon Timer
To set time of day grasp knob which is in the center of the inner (fail-safe) dial and rotate it in a counter-clockwise
direction. This will cause the outer (24 hour) dial to revolve. Line up the correct time of day on the outer dial with
the time pointer. Do not try to set the time control by grasping the other (24 hour) dial. Place pins in the outer dial at
the time of day that defrost is required,
Operation of Grasslin Timer
To set the time, turn the minute hand clockwise until the time of day (and AM or PM) on the outer dial is aligned
with the triangle marker on the inner dial. Do not rotate minute hand counter-clockwise. Move the white tab
(tripper) on the outer dial outward at each desired initiation time. Each white tab (tripper) is a 15-minute interval
and provides 15 minutes of defrost, for longer defrost duration, move additional tabs (following in time) from the
initiation tab. For example, if a 45 minute defrost is to start at 7:00 AM, move the tabs outward that lie between
7:00 - 7:15, 7:15 - 7:30 and 7:30 - 7:45 on the AM side of the dial. The defrost will initiate at 7:00 AM and time
terminate at 7:45 AM (if temperature termination does not occur first). For models with plastic cover on timer
assembly; re-install cover after adjustment.
NOTES:
I. Lockout relays or normally closed switch of auxiliary contact on the compressor contactor may be wired to defrost contactor.
Its purpose is to prevent energizing of the defrost heaters until the compressor has pumped down and stopped, thus keeping
power demand to a minimum.
2. If the control voltage is to remain energized for any period with the compressor disabled, remove the defrost clock pins to
prevent the defrost heaters from energizing.
3. A Preventative Maintenance schedule should be set up as soon as possible after start-up to maintain equipment integrity.
NOTE:
After correcting faulty condition, it is essential that the coil and unit be free of ice before placing
unit back on automatic operation.