Robertshaw SlimZone CLASSIC ZONE CONTROL SYSTEM - Manual (Page 5)

3. COMPONENT REQUIREMENTS
3.1 BASIC SYSTEM
The basic system consists of the main SlimZone Classic control panel and the components
required to support it.
ITEM QUANTITY CONSIDERATIONS
2701-001 or 2701-006 1 controls 3 or 2 zones
4 wire heat/cool thermostat 1 per zone use standard nonshielded 4 conductor
18AWG copper wire
Motorized zone dampers 1 per zone (minimum) use standard nonshielded 2 or 3
(2 or 3 wire) conductor 18AWG wire
Barometric bypass damper 1 BP-10 up to 3 tons capacity or
OR BP-12 5 tons capacity
Motorized bypass damper 1 use standard nonshielded 3 conductor
18AWG wire; requires 24VAC transformer
and static pressure controller (refer to
section 4.6.3)
24VAC transformer 1 for control panel 75 VA; refer to section 3.3 for load
considerations
Table 3.1: SlimZone Classic Component Requirement
3.2 THERMOSTATS
SlimZone Classic requires any conventional electromechanical or electronic 1 heat/1 cool
auto or manual thermostat.
3.3 SIZING TRANSFORMERS
To avoid unsatisfactory operation DO NOT power this control panel with the HVAC
equipment transformer. The rated voltage for the SlimZone Classic is 20-30 VAC, 24
nominal. A dedicated field supplied 24VAC, 75 VA transformer is recommended to power
the control panel, which in turn provides power to the zones including up to a total of 5
dampers. Typical zone dampers require a maximum of 12 VA each. Where damper loads
exceed 5 dampers at 12 VA per damper, install a relay to switch the extra load.
3.4 SIZING DAMPERS
It is important that dampers be sized according to system ductwork specification (CFM)
and balanced in compliance to SMACNA, ACCA and ASHRAE guidelines in order for the
control system to properly control comfort in each zone. Typical dampers are non-
modulating and are available in 2 wire (powered closed, spring return to open), or 3 wire
(powered closed, powered open) configuration. The pressure drop across typical control
dampers is negligible and normally not a factor when sizing or calculating branch duct
CFM. Typical dampers are designed to work with low pressure systems (1.0" WC) or less.
SlimZone Classic 3