General Features Master Control Panel Power Controllers Controller(s) Conditions Service Operation Electrical Consideration Approvals                     General Features Master Control Panel Power Controllers Controller(s) Conditions Service Operation Electrical Consideration Approvals                                 General Features Master Control Panel Power Controllers Controller(s) Conditions Service Operation Electrical Consideration Approvals                       General Features Master Control Panel Power Controllers Controller(s) Conditions Service Operation Electrical Consideration Approvals                   General Features Master Control Panel Power Controllers Controller(s) Conditions Service Operation Electrical Consideration Approvals

PACE® PERIMETER HEATER CONTROL SYSTEM GENERAL: The System shall be a PACE DDC Perimeter Electric Heat Control System. The control system shall provide automatic continuously modulated heat output from the perimeter electric heating system. This system shall use outdoor parameter sensing to establish the system operating point. System designs which include interior sensing shall not be acceptable. The heating system output shall vary inversely with the change in outdoor temperature with 0% output at 60OF and 100% output at building design outside temperature. The system shall proportionately compensate for building service voltage reductions by accurately maintaining heater BTU output. The system shall also automatically adjust heater output to compensate for wind and rain. System shall be an all state-of-the-art Microprocessor-based design using digital control modules and an Interface Module for maximum reliability and fast response. System shall include a communications module to allow remote monitoring and changing of the parameters of System characteristics to meet the specific building characteristics over the normal range of operation. The Control Configuration and sequences shall include: 1. Night Setback, demand limited. 2. Demand limited Morning Pickup with averaged interior temperature sensing. 3. Solar reset Zones. 4. PACE Morning Pickup RTU/AHU Control Sequence 5. Communications Package (Requires Telephone Line by Others) FEATURES: Night Setback, Demand Limited: A night setback feature shall be provided to reduce system output during unoccupied time periods. This option shall not cause any abnormal electrical peak demand as monitored by the utility during the change from day to night operation or from night to day operation. Morning Pickup, Demand Limited: A demand limited morning pickup feature shall be provided which will begin at the end of the night setback period and shall have an optimized start schedule by a micro block function in accordance with interior temperature averaged from difference locations. The percentage limit of morning pickup shall be easily adjusted from 0 to 50% of total system output. This function shall also include a night setback override which will prevent night setback when outside conditions require system operation above 70% output, thus insuring that there will be sufficient system reserve capacity for morning pickup. Solar Reset: The control system shall include an individually adjustable solar setback zone(s) of the building exposures. This option shall allow the system to automatically reset each exposure to a lower operating percentage of heat output depending on solar heat gain. The percentage of solar setback shall be easily adjustable from 0% to 100% of total system output. The solar sensors shall be of the angular responsive type to provide a solar signal proportional to the magnitude of the actual solar radiation including the variation due to the angle of incidence to the plane of the wall comprising the solar zone. Morning Pickup RTU/AHU FAN CONTROL Sequence: This control function shall send a LAN Broadcast (Alternate: a signal-24VAC or Dry Contact) to turn on RTU/AHU Fan(s) for improved temperature measurement and to distribute the morning warmup heat. The unit(s) shall remain in recirculation mode without cooling. Zone Tracking: This control function block shall provide Zone Tracking for auxiliary zones. This option shall allow adjustment of the 100% control signal value for auxiliary slave SCRs) without affecting the 0% control signal. This option shall be independent of the main system calibration controls for 0% and 100% operating points. Override Relays: Individual override relays shall be provided for override Zones. These override relays when powered by the control module(s) or the manual override timers, if provided, will bring these Zone(s) back to day operation without causing any abnormal electrical demand. MASTER CONTROL PANEL: The Master Control Panel shall be a state-of-the-art Microprocessor-based design using DDC control modules. The Master Control Panel shall be completely pre-wired and tested. The control module(s) shall be loaded with the required Software to operate the system to meet the building design criteria. The communications module shall allow to change the parameters of System characteristics over the telephone line. SENSORS: The outdoor ambient sensors (active 8, passive) are to be located on the north or northwest side of the building in such a manner as to prevent the sun from striking sensor(s) during any part of the day all year around. Sun shields are to be provided if necessary. The solar sensor(s), interior mounted (or outdoor mounted), are to be located on each solar exposure with the sensor parallel to the building face. The height of the sensor shall be so as to respond to the average solar load, especially during sunrise and sunset. The outdoor ambient sensors (active & passive) and outdoor solar sensor(s) shall be mounted on the building in a secure and safe location. All outdoor sensors shall be located a minimum of 10 feet from the ground level and in the open away from closed, blocked, or restricted areas and/or as shown on the architectural drawings. Alternate sensor locations must be verified. The Morning Pickup sensors are to be located away from any sources of heat and approximately 5 feet from floor level. CONTROL WIRING: The sensor control wiring shall consist of a twisted pair (or twisted three-wire) where indicated on the field control wiring drawings. The sensor control wiring MUST be run separate from any power wiring or any other control wiring. All PACE sensor control wiring can be run together. Shielding is required for mechanical protection only. Wire is to be supplied by electrical contractor. Wire gauge shall be in accordance with GEEI drawing 091-21-01. POWER CONTROLLER(S): Modular Type SCR Power Controllers: The Modular Power Controller(s) (MPC) shall be a completely prewired U.L. Listed assembly. The SCR (Silicon Controlled Rectifier) assembly shall be mounted in a ventilated enclosure with individual "Power On" 8, "Load On" lights for each circuit. The complete unit shall be U.L. Listed. The SCR device shall be of a plug-in design for simple field replacement. Standard Type SCR Power Controllers: The SCR (Silicon Controlled Rectifier) Power Controllers shall be completely prewired and include a U.L. Recognized SCR assembly consisting of SCR heat sink assemblies, timing circuit, a "phase correct" indicator, 12T fusing and necessary line and load terminal blocks. Auxiliary power terminals shall also be provided for initial testing circuits and as emergency bypass lugs. This SCR assembly shall be mounted in a ventilated enclosure with individual phase "load on" lights. Each SCR Power Controller MUST operate independently and randomly from the control signal received from the Master Control Panel. The SCR control timing circuit shall be of the zero crossover switching type so as not to produce any radio frequency interference (RFI) and shall have an internal feedback circuit for stability. The control timing circuit shall be designed so as to minimize the possibility of any visible light flicker within the building. The control timing circuit shall turn power off if the control signal is lost. The SCR heatsink subassemblies shall utilize standard SCR devices for reliability and shall have an ambient operating temperature of at least 1220F. Triac devices shall not be acceptable. MDR TYPE POWER CONTROLLER(S): The MDR Power Controllers as assembled by Harrison Electro Mechanical Corporation, a wholly-owned subsidiary of General Electronic Enterprises, Inc., shall be a completely prewired U.L. Listed assembly. This power controller assembly shall include U.L. and/or C.S.A. approved 35 Amp mercury displacement type relays (MDR) of a hermetically sealed type construction, necessary zone driver circuits, necessary tagged line load terminals and control terminals. Each Power Controller timing circuit(s) shall be calibrated to operate from the control signal with less than a +/-2% output error relative to 100% output over the input control signal range of 5% to 95%. These accuracies must be readily obtained during extreme building voltage variations. Demonstration of these accuracies MUST be provided. The Master Power Controller(s), when supplied, shall provide a building voltage monitor signal to the Master Control Panel. The Power Controllers shall be rated as listed in the equipment schedule. CONDITIONS: WARRANTY: A parts warranty shall be provided on all equipment supplied which will extend for a period of 12 months from system Startup, Date. In the event System Startup has not occurred within 6 months of Equipment Shipment Date; the warranty period shall be for a period not to exceed 18 months from Equipment Shipment Date. When provided, MDR Type Power Controllers shall have an additional 2year extended parts warranty on the individual relays. SERVICE: Field installation supervision, preliminary system checkout and field start-up calibration shall be provided. A second field calibration verification shall be provided within the first year of operation. One year's Extended Warranty Service labor shall be provided to maintain the proper operation of the supplied equipment for one year after date of system startup. Service calls not specifically the result of system malfunction are not included. As minor field readjustments can reduce energy waste, a one-year consulting service will be provided to allow the building maintenance personnel to tailor calibration adjustments to the actual building characteristics, thus allowing for maximum energy savings. OPERATION: Due to the complex function of the PACE System and interaction of the PACE System with building characteristics, initial start-up and system operation will be delayed until sufficient building occupancy is available for successful system operation. The heating system will be fully functional by use of the SCR auxiliary lugs but without system control. ELECTRICAL CONSIDERATION: The SCR Power Controller(s) SHALL NOT be operated in the load circuit until a full power check has been made to verify that a "no-short" condition exists at full voltage for each heater sub-circuit. All loads, including the field power wiring, MUST be operated at full rated voltage and current prior to the SCR power controller(s) to verity a no-short condition. The SCR power controller(s) warranty will be void if the SCR's are operated into a shorted load. Temporary operation of SCR Power Controllers prior to system startup is NOT allowed and may void warranty. The Standard type SCR power controller(s) MUST be electrically supplied using conservatively rated feeders to minimize any feeder voltage drop. The Standard type SCR power controller feeders over 100 Amps must be connected directly from the main building distribution system. The Standard type SCR power controller feeders must not be common to any lighting circuits. The Standard type SCR power controller maximum load ampere rating must not be exceeded on any phase. Auxiliary terminals are provided for initial testing of heaters and services. All SCR power controller load calculations must be made at the "nominal" supply voltage. The loads must be restrictive for proper SCR power controller operation. Motors of lights MUST NOT be connected to the load side of the SCR power controller. The circuit breaker(s) feeding a SCR Power Controller MUST NOT exceed the rating specified for that SCR power controller. The SCR power controller room ambient during full load operation must not exceed 1050F. SCR power controller enclosure must be mounted in free air for proper ventilation. Each SCR power controller assembly must be protected from contaminiation such as water, dust and dirt especially during initial installation. APPROVALS: Alternate manufacturers must secure approval prior to bid date. Approval will require submission of proof of compliance to system specification, proof of successful total system responsibility and proof of system operation for installations of a similar design concept which have been installed and operating for more than three years.   TOP