Overall HVAC System

The figure below illustrates the schematic HVAC system which provides for heating and cooling of the Intelligent Workplace on the fourth floor of Margaret Morrison Carnegie Hall (MMCH). The hot water is supplied from the campus steam network into the second basement of MMCH. The campus supplied steam is converted into hot water in the second basement by the heat exchanger which is then pumped onto the 4th floor mechanical room. The hot water in the 2nd basement is 180 F and the supply water in the 4th floor is 178 F.


The hot water is pumped from the 2nd basement to the 4th floor mechanical room by the hot water supply pump located in the 2nd basement. There are two hot water supply pumps in order to alternate the usage of the pumps in situations of breakdown or overload of one of the pumps.


The chilled water is supplied from the campus chilled water network which is pumped onto the 4th floor. The temperature of the supply water is approximately between 40 F – 42 F.

Figure 1: Schematic Diagram of the HVAC System

Components of the basement HVAC System

Device type

Water pump

Device ID

Hot/chilled water supply pump

Manufacturer

Ball & Gossett (ITT Fluid Technology)

Model

1-1/2BC 1510,1750 R.P.M (1510 7.250 BF_09157)

Part Number

2072196 (IDN: H79)

Installation date

05/09/1997

Description: HotWaterpump1_2                      
Device description:
Pump: 85 GPM; 48FT; 3HP; 208 Volts; 60CY; 3PH; Motor ENCL. ODP; Approximate Weight 200 LBS; Material of construction, Bronze fitted; Motor Frame 182 T
Engine: Marton Electronic; CAT NO-H123; Model 4VF1821 TDR 7026 DJ; Serial No.: PH-3TUP-TDR; Motor Frame 182 T

Device type

Water flow rate sensor

Device ID

Hot/chilled water flow rate sensor

Manufacturer

Onicorn Incorporated

Model

F - 1210

Part Number

101801

Installation date

03/25/1999

Description: Hot%20waterSupplyFlowRateSensor
Device description:
Dual Turbine Insertion Flow Meter Analog Output;
Pipe Size 3; SCHD Copper; Frequency Output Factor 36.58 PPG; Analog Output 4-20mA & 0-10 VDC; Flow Scale0-100 GPM

Device type

Water Temperature Sensor

Device ID

HWS/CWS - T

Manufacturer

Johnson controls

Model

TE 6300 Series temperature sensor

Part Number

TE – 6312P - 1

Installation date

N/A

Location of device on schematic:
Description: HX1HWReturnsupplyTemp
Device description:
Thin film nickel, 0.1% accuracy, 8” well, 1k ohm, temperature sensor

Schematic Hot Water System

schema

Schematic Chilled Water System

schema1

Secondary water loop in the fourth floor

fourth