Robertshaw SlimZone Deluxe ZONE CONTROL SYSTEM - Manual (Page 13)

7.8 ZONE UPSTAGING
Upstaging can be based on a selected number of zones calling instead of time. Upstaging to
second and third stages may be set to 2 zones and 3 zones, 3 zones and 5 zones, 3 zones
and 6 zones, and finally 4 zones and 7 zones, respectively. Zone upstaging also provides an
adjustable time delay for auxiliary heat when used with a heat pump system of 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.
7.9 HIGH AND LOW LIMIT TERMINALS
High and low limit terminals are provided to protect equipment against extreme discharge air
temperatures. An independent high and low limit control is recommended to protect the
HVAC equipment from these conditions. When a limit setting is reached, the highest active
stage is immediately turned off. If the discharge air temperature continues to reach the limit
setting after five minutes, the next highest active stage is turned off. In a single stage appli-
cation, the system will be turned off immediately. After the first stage is turned off, the fan
will continue to run for five minutes or until the limit input is no longer active. Limit controls
are connected to the HLIM, LLIM, and LIMC terminals on the panel. Refer to the illustration
on page 18, Logic Panel Terminal Designation Illustration for Input – Detail D.
7.10 HIGH BALANCE POINT (HI BP) (ODT) TERMINALS
Two terminals, BPC and HBP, are provided to connect an outdoor thermostat (ODT). When
the terminals are closed by the ODT, the logic panel will prevent the auxiliary heat from ener-
gizing as long as the outdoor ambient temperature is above the high BP (high balance point)
setting.
7.11 LOW BALANCE POINT (LOW BP) TERMINALS
A terminal designated LBP in conjunction with terminal BPC may be used with an outdoor
thermostat (ODT). When the terminals are closed by the ODT, the logic panel will prevent the
heat pump from energizing and will energize the auxiliary heat as long as the outdoor ambi-
ent temperature is below the low BP (low balance point) setting.
7.12 CLOCK TERMINALS
Terminals designated CLK and SCC may be used with a variety of time/temperature devices
to provide occupied/unoccupied scheduling of the entire zone system. When the terminals
are closed, system calls are disabled, all dampers are opened, and the economizer (if select-
ed) is closed.
7.13 SMOKE DETECTOR TERMINALS
Terminals designated SMK and SCC may be used with a smoke detector. When the termi-
nals are closed, 24-volt power from the logic panel to the equipment will be disrupted and all
3-wire zone dampers will be powered to the closed position. If a smoke detector interrupts
primary power to the system, the logic panel will not be able to power the 3-wire
dampers to the closed position.
SlimZone Deluxe 9