Robertshaw SlimZone Deluxe ZONE CONTROL SYSTEM - Manual (Page 12)

7.2 REVERSING VALVE OPERATION
The O/B terminal can be configured as O or B. The factory O/B default is set to cooling (O).
Reversing valve output does not change upon satisfying a conditioning mode. When the
operating mode is switched (heat/cool), the reversing valve output is switched without
deenergizing the compressor output.
7.3 FAN OPERATION
When any zone thermostat is initiated in the continuous fan mode, the G input terminal will
be activated. Only zones with thermostats calling for constant fan will receive ventilation air.
When an equipment call takes place, the fan will run intermittently with the equipment mode
of operation and the calling zone(s). After a call is satisfied and depending on the fan purge
selection, ventilation air then will be distributed to the zone thermostats set in the continuous
fan mode. The Robertshaw SlimZone Deluxe also features an on-board continuous fan
option switch or dedicated terminal that can be used with a time clock to schedule continu-
ous fan operation. If continuous fan is selected via SW3 or the FAN input, all zones will
receive ventilation until an equipment call takes place.
The G2 output terminal may be used as second stage fan. G2 may be selected to activate
based on number of zones calling or number of equipment stages energized. Refer to the
illustration on page 23, Logic Panel Switch Locations and Control Settings for G2 Fan Output.
7.4 GENERAL CONTROL ALGORITHM
The Robertshaw SlimZone Deluxe logic panel uses a first call priority/timeshare algorithm.
Any zone that calls for conditioned air prioritizes the equipment mode of operation. In the
event a simultaneous heating/cooling call takes place, the factory default will prioritize heat-
ing. Equipment upstaging takes place when a zone continuously calls for conditioned air
beyond a selected preset threshold. The timeshare portion of the algorithm is designed to
prevent an equipment mode from exceeding 20 minutes from start time if and only if an
opposite call takes place.
7.5 MINIMUM ON/OFF TIME DELAYS
When the HVAC equipment is energized in heating, the minimum ON time is 2 minutes. After
the equipment is deenergized, the minimum OFF time is 2 minutes. When the HVAC equip-
ment is energized in cooling, the minimum ON time is 4 minutes. When the HVAC equipment
is deenergized, the minimum OFF time is 4 minutes. When the system is set up for heat
pumps, the minimum ON/OFF time for heating and cooling is 4 minutes.
7.6 FAN PURGE
A fan purge of 45 seconds may be selected for heating, cooling, or both. Fan purge can also
be disabled. During a fan purge cycle, if any zone calls in the previous mode, the receiving
zone damper(s) will be driven closed and the calling zone damper will be opened.
7.7 TIME UPSTAGING
The factory default upstage setting for multistage equipment is 5 minutes. The upstage time
may be adjusted from 5, 10, 15, or 20 minutes. Refer to the illustration on page 22, Logic
Panel Switch Locations and Control Settings for Upstage Delay, Upstage Zones, and
Upstage Auxiliary Heat.
SlimZone Deluxe
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