LL357D4 PDS, 4.2011
2
Specification/Features (cont'd)
Ease of Installation
• Wiring connections insensitive to the phasing of
the air conditioners.
• Temperature sensor built into the unit (optional
remote sensor available).
• Easy terminal connections for thermostat wire.
Timing Device
• Solid state timer with both 3.5 and 7 day
changeover capability. Timing accuracy ±5%.
• Momentary push button for accelerated
manual timer advance. (7 seconds = 7 days)
• Light emitting diodes indicate power on and
identifies the lead unit.
Enclosure
• 16 gauge appliance white, pre-painted
aluminum.
• Provides low profile thermostat mounting.
• Openings in cover for “LED” indication of power
on and for lead unit.
• Doubles as junction box for control wiring to air
conditioners.
Low Voltage Wiring
1. All wiring must comply
with local codes and
ordinances.
2. Disconnect power to
prevent electrical shock
or equipment damage.
3. On dual units, wire
the air conditioners
according to the wiring
detail.
4. Provide power to the
controller.
NOTE:
•
Terminals 5 and 7 on the
ComPac
®
I & ComPac
®
II
air conditioner’s terminal
board are dry contacts
which can be used for
remote signalling in the
event of equipment cut-
off on refrigerant pressure
limit.
•
For continuous indoor fan
operation, install a jumper
between terminals 8 and
3 and remove jumper
between 1 and 3.
•
Also, terminals 8 and 10
can be connected to a
normally closed smoke
or fire detector to cause
equipment shutdown
when the circuit is opened.
(Remove factory jumper.)
LED Operation
•
Green (middle light) means
power on to both units.
•
Red (left and right lights)
indicates the lead unit.
Summary of Contents for Marvair LL357D4
Page 11: ...LL357D4 PDS 4 2011 11 Notes...
