Product data

Guide specifications
Multiple Zone HVAC Control System
Model Number: 33CSVMT (VVTt Monitor Thermostat
with Timeclock)
33CSVM (VVT Monitor Thermostat
without Timeclock)
33CSZC (Zone Controller)
33CSBC (Bypass Controller)
Part 1 – General
1.01 SYSTEM DESCRIPTION
The system shall consist of a multiple zone capacity
programmable, communicating monitor thermostat,
with multiple zone controllers, and a bypass control-
ler. The system shall also include a complete array of
sensors and input components. The system control
devices shall be capable of stand-alone application or
as a multiple system networked in a communication
bus. The system components shall operate and be
configurable without the use of a computer, but shall
provide the capability of both local and remote net-
work access through a computer.
1.02 QUALITY ASSURANCE
The control system shall be designed to conform to
UL and CSA standards. Controllers shall be manu-
factured within an ISO-9000 certified facility.
1.03 DELIVERY, STORAGE AND HANDLING
Thesystemcontrolproducts shall bestoredandhandled
per manufacturer’s recommendations.
Part2–Products
2.01 EQUIPMENT
A. General:
The control system shall be available as a complete
package, with the required input sensors and addi-
tional control components readily available. It shall
provide complete control of the HVAC system includ-
ing: unit, bypass airflow system, and zone control.
Individual zones in the system shall have the capabil-
ity to provide supplemental heat and pressure inde-
pendent operation. Each device in the system shall
be capable of ‘‘self-test’’ on-board diagnostics which
communicate alarms and operating status. Unit con-
trol relay packs shall be available factory-installed
with direct connection to the field-installed monitor
thermostat.
B. Memory and Timeclocks:
The system components shalloperate withoutthe use
of battery back-up to support time clocks and non-
volatile memory storage. The timeclocks must be ca-
pable of retaining the correct time for a minimum of
10 hours and the non-volatile memory storage shall
be indefinite during a power interruption. The system
shall restart itself and immediately begin normal op-
eration when power is restored.
C. Stand-Alone Capability:
The system shall be capable of operating as a stand-
alone system and not require a computer to prompt
any functions for normal operation. The system shall
be capable of interface to a computer either remotely
or locally for purposes of diagnostics, programming,
monitoring, and data logging.
D. VVT Monitor Thermostat:
1. Shall include zone and unit control capabilities.
2. Shall include an electronic control that shall de-
termine the demandfor heating or cooling based
on the space demand.
3. Shall have the ability to operate the system fan
eitherautomatically, withthefan switch onAUTO
(fanoperation only duringasystem occupiedheat-
ing or cooling mode), or continuously during the
occupied mode with the fan switch set to ON.
Fan operation during unoccupied mode shall be
automatic. Heat, Cool, and Fan switches shall be
accessible and changeable from a remote loca-
tion. The system shall provide both commanded
and actual fan status.
4. Shall have the ability to protect the system con-
figuration from tampering and misuse by provid-
ing a minimum of 4 levels of security access into
the thermostat control. Access levels shall range
from allowing no configuration changes at the
system control to allowing full configuration at
thesystem control.Accesslevels withinthatrange
shallprovide foruser comfortadjustmentsof tem-
perature and schedule of use.
5. Shall have the ability to automatically or manu-
ally change-over between heating and cooling.
6. Shall be capable of monitoring supply air tem-
perature and utilizing this information as a safety
device to deenergize stages of heating or cool-
ing when adjustable equipment temperature lim-
its are exceeded.Individual configurabletempera-
ture values for first and second stage both heating
and cooling limits shall be selectable.
7. Shall include the capability to prevent unneces-
sary operation of second stage when on-board
trending indicates thatfirst stagecan satisfyspace
demand.
8. The control system shall provide protection from
theunit beingintermittentlysequenced fromheat-
ing to cooling until the Time Guardt time period
has elapsed. The Time Guard time period shall
be a minimum of 5 minutes and shall vary with
control system thermostat identification number
or address. An integral override feature shall be
provided to allow service troubleshooting to be
performed without waiting for the Time Guard
interval.
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