optimum applied systems inc · 3. record of all heating burner on/off cycles, identified separately...

171 Brady Avenue. Hawthorne. NY. 10532Phone: 914.741.0686 Fax: 914-741-1131

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OPTIMUM APPLIED SYSTEMS,INC.

HEAT COMPUTER 3500 DSL

TECHNICAL SPECIFICATIONS


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HC 3500 GENERAL SYSTEM DESCRIPTION

The Heat Computer is a computerized building heating control system that utilizes sensors tomonitor apartment temperatures and energize the boiler by using algorithms or programming toquery sensor input and test for various conditions. The Heat Computer energizes the boilerswhen the temperature in a majority of spaces falls below the programmable setpoint and de-energizes the boilers when the majority of these spaces that called for heat, or the ambienttemperature, exceeds their respective setpoints. The Heat Computer is compatible with DSLInternet connections via a static IP. This connection is used for data collection, programmingplus automatic alarm messages. Software for accessing and organizing the output into severalreports is also provided.

The Heat Computer is built upon a custom embedded computer motherboard, complete with 8thermistor inputs, 6 dry contact digital inputs, 2 pulse meter input, and 8 contact closure outputs.This basic configuration can be expanded by use of expansion boards.

One useful aspect of this Heat Computer is the alarm notification function. Any signal, digital oranalog, can be set to trigger an email alert to provide notification of an alarm condition. This canbe used to monitor sensitive temperatures, pressures, levels, or anything the user feels isimportant enough to warrant.

The Heat Computer stores all events and user configurable data using 64KB to 128KB ofnonvolatile battery backed memory and an additional 96KB of serial EAROM. This informationcan be accessed remotely from any computer, or the Heat Computer can be set to dial a remotecomputer at prescribed intervals and download its data for off-line storage and analysis.

A local RS232 port is available for access to system functions, configuration and programming.A local keypad and LCD are used to provide on-site information and reporting.


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HC 3500 SYSTEM FEATURES

A. The Heat Computer monitors building, heating system, domestic hot water, and steamparameters:

1. Eight space apartment temperatures (Optionally expandable to 20.)(Optional ability to utilize up to 20 wireless apartment temperature sensors)

2. Outside temperature3. Aquastat temperature in heating boiler4. Domestic hot water temperature (after mixing valve)5. Stack temperature (optional)6. Heat burner on/off7. Heat burner flame failure8. Boiler water make-up consumption (optional)9. Supply temperature (used for hydronic systems)10. Return temperature (optional on steam systems; required on hydronic systems)

B. The following setpoints are monitored on screen and are programmable via the Internet:

1. Seven programmable time/temperature setpoints within the 24 hour day.2. Daytime outside cutoff temperature3. Nighttime outside cutoff temperature4. Aquastat setting and differential

(unless the heating system has multiple boilers or uses utility municipal steam)

C. Output controls include whichever of the following are required for this particularsteam/hydronic plant:

1. Up to six burner control relays for multiple stages, high/low fire, or dual boilers2. One on/off zone valve relay or one on/off circulator relay (Up to two zones can be

controlled using expansion boards)3. Up to two expansion boards can be added to control two fully modulating flame

boilers.


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HC 3500 RECORDS/REPORTS

A. Online reports generated and available with the Heat Computer include:

1. Current temperatures and status of all monitored points2. Record of all monitored temperatures starting date of installation3. Record of all heating burner on/off cycles, identified separately for heat and

domestic hot water4. Flame failures, power failures, overrides, and keyswitch movements for the most

recent 84 events5. Daily record of total daily burner run-time, heat time, boiler water consumption,

high-low outside temperature, high/low aquastat temperature, high/low domestichot water temperature, highest stack temperature

6. Display of all setpoints including dial-out conditions

B. The Heat Computer automatically transmits an alarm message for the following heatingplant conditions:

1. Burner malfunction2. Aquastat temperature too low3. Domestic hot water temperature too low4. System bypassed5. Area sensor disconnected6. Analog-to-digital converter error7. Two additional generic alarms


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HC 3500 INSTALLATION/OPERATIONS

A. Installation shall be performed and supervised by skilled personnel regularly involved inheating plant controls work who are employees of or authorized installers of OptimumApplied Systems, Inc. (OAS).

B. The sensing element in the sensors shall be an interchangeable thermistor. Space(apartment) sensors shall be surface mounted in each room in a plastic enclosure suppliedby OAS and installed on an interior wall at a height of five (5) feet six (6) inches. Thewater temperature sensors shall be inserted in a well or strapped onto piping. Strap-ontype shall utilize a heat conductive compound. Stack temperature sensors shall have athermocouple sensing element.

C. All monitored temperatures shall be readable on the Heat Computer front panel locatedon site in the boiler room area. The Heat Computer cabinet and system programmingrequire keyed access. Reports and setpoint access are available on site only via apersonal computer connected to the local port.

D. Power connections to the heating control: number of conductors and size according toNEC in raceway (conduit or wire molding) to the nearest appropriate power circuit.Provide junction box and connections as required. Surge protection on both telephoneand power wiring inputs to the module shall be integral, provided as a packagedaccessory, or as recommended by OAS.

E. The Heat Computer automatically switches to Daylight Savings Time at 2 AM on thefirst Sunday of April and back to Standard Time at 2 AM on the last Sunday of October.

F. A standard DSL line with router and a static IP must be installed by a service providernot more than three (3) feet from the Heat Computer. OAS can provide assistance inobtaining the proper configuration for the DSL router. The cost of providing this lineshall not be included in the cost of the control system.

G. A web based communication package shall be integrally furnished and installed with thefollowing capabilities:

1. Automatic data retrieval. The web interface to the Heat Computer connectsthrough a SQL database server, providing all recorded information on the HeatComputer from the date of installation to the present conditions. This package iscapable of gathering specified data time from each Heat Computer, and atoperator’s option:

a. Display information on screen and/orb. Print information and/orc. Store information on hard disk

2. Programming of setpoints and alarm conditions.3. Graphical analysis of boiler operational conditions

optimum applied systems inc · 3. record of all heating burner on/off cycles, identified separately...

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