Carrier 50HQP072-120 specifications Water Quality Guidelines, Material

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Table 2 — Water Quality Guidelines

CONDITION

HX

CLOSED RECIRCULATING†

 

OPEN LOOP AND RECIRCULATING WELL**

MATERIAL*

 

 

 

 

 

 

 

 

Scaling Potential — Primary Measurement

 

 

 

 

 

 

Above the given limits, scaling is likely to occur. Scaling indexes should be calculated using the limits below.

 

 

 

 

pH/Calcium

All

N/A

 

pH < 7.5 and Ca Hardness, <100 ppm

 

Hardness Method

 

 

 

 

 

 

 

 

 

Index Limits for Probable Scaling Situations (Operation outside these limits is not recommended.)

 

 

 

 

Scaling indexes should be calculated at 150 F for direct use and HWG applications, and at 90 F for indirect HX use. A monitoring plan should be

 

implemented.

 

 

 

 

 

 

 

Ryznar Stability Index

All

N/A

 

6.0 - 7.5

 

 

 

 

If >7.5 minimize steel pipe use.

 

 

 

 

 

 

Langelier Saturation Index

 

 

 

 

–0.5 to +0.5

 

 

All

N/A

 

If <–0.5 minimize steel pipe use.

 

 

 

 

Based upon 150 F HWG and direct well, 85 F indirect well HX.

Iron Fouling

 

 

 

 

 

 

 

Iron Fe2+ (Ferrous)

All

N/A

 

 

<0.2 ppm (Ferrous)

 

(Bacterial Iron Potential)

If Fe2+ (ferrous) >0.2 ppm with pH 6 - 8, O2<5 ppm check for iron bacteria.

 

 

Iron Fouling

All

N/A

 

 

<0.5 ppm of Oxygen

 

 

 

Above this level deposition will occur.

 

 

 

 

 

 

Corrosion Prevention††

 

 

 

 

 

 

 

pH

All

6 - 8.5

 

6 - 8.5

 

 

 

Monitor/treat as needed.

Minimize steel pipe below 7 and no open tanks with pH <8.

 

 

Hydrogen Sulfide (H2S)

 

 

 

 

<0.5 ppm

 

 

All

N/A

At H2S>0.2 ppm, avoid use of copper and cupronickel piping or HXs.

 

 

Rotten egg smell appears at 0.5 ppm level.

 

 

 

 

 

 

 

 

 

Copper alloy (bronze or brass) cast components are okay to <0.5 ppm.

Ammonia Ion as Hydroxide,

 

 

 

 

<0.5 ppm

 

Chloride, Nitrate and Sulfate

All

N/A

 

 

 

 

 

Compounds

 

 

 

 

 

 

 

Maximum Chloride Levels

 

 

Maximum allowable at maximum water temperature.

 

 

 

50 F (10 C)

 

75 F (24 C)

 

100 F (38 C)

 

Copper

N/A

<20 ppm

 

NR

 

NR

 

CuproNickel

N/A

<150 ppm

 

NR

 

NR

 

304 SS

N/A

<400 ppm

 

<250 ppm

 

<150 ppm

 

316 SS

N/A

<1000 ppm

 

<550 ppm

 

<375 ppm

 

Titanium

N/A

>1000 ppm

 

>550 ppm

 

>375 ppm

Erosion and Clogging

Particulate Size and Erosion

 

<10 ppm of particles and a max-

<10 ppm (<1 ppm “sand free” for reinjection) of particles and a maximum velocity of 6

 

All

imum velocity of 6 fps. Filtered

fps. Filtered for maximum 800 micron size. Any particulate that is not removed can

 

 

for maximum

potentially clog components.

 

 

800 micron size.

 

 

 

Brackish

All

N/A

Use cupronickel heat exchanger when concentrations of calcium or sodium chloride

 

are greater than 125 ppm are present. (Seawater is approximately 25,000 ppm.)

 

 

 

LEGEND

HWG — Hot Water Generator

HX — Heat Exchanger

N/A — Design Limits Not Applicable Considering Recirculating

Potable Water

NR — Application Not Recommended

SSStainless Steel

*Heat exchanger materials considered are copper, cupronickel, 304 SS (stainless steel), 316 SS, titanium.

†Closed recirculating system is identified by a closed pressurized piping system. **Recirculating open wells should observe the open recirculating design considerations.

††If the concentration of these corrosives exceeds the maximum allowable level, then the potential for serious corrosion problems exists.

Sulfides in the water quickly oxidize when exposed to air, requiring that no agitation occur as the sample is taken. Unless tested immediately at the site, the sample will require stabilization with a few drops of one Molar zinc acetate solution, allowing accurate sulfide determination up to 24 hours after sampling. A low pH and high alkalinity cause system problems, even when both values are within ranges shown. The term pH refers to the acidity, basicity, or neutrality of the water supply. Below 7.0, the water is considered to be acidic. Above 7.0, water is considered to be basic. Neutral water contains a pH of 7.0.

NOTE: To convert ppm to grains per gallon, divide by 17. Hardness in mg/l is equiv- alent to ppm.

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Contents Contents Safety ConsiderationsInstallation GeneralPhysical Data 50HQP072-120 Units Unit Dimensions Typical Horizontal Installation Install Condensate Piping Drain Hanger BracketsRemoving Panels Install Field Power Supply Wiring Supply/Return Hose KitTypical Ground-Water Piping Installation Water Quality Guidelines MaterialFP2 DPPFP1 HpwrSee legend and notes on SAT LWTSPT Electrical Data 50HQP072-120 Standard Units Electrical Data 50HQP072-120 Dual Point Power UnitsLow Voltage VA Ratings Install Field Control Wiring Jumper LocationsPRE-START-UP Blower Data 50HQP072 AirflowBlower Data 50HQP096 Blower Data 50HQP120 Deluxe D Control Jumper Settings See Fig Complete C Control Jumper Settings See FigField Selectable Inputs Accessory DIP Switch Position Relay Options DIP Switch Block S2 Accessory 1 Relay OptionsDIP Switch Block S2 Accessory 2 Relay Options OADOperating Limits Unit Start-Up in Cooling ModeSTART-UP Start Up SystemCoaxial Water Pressure Drop Unit Start-Up in Heating ModeSize Operation Approximate Fluid Volume L Per 30 M of PipeAntifreeze Percentages by Volume Units with Aquazone Complete C ControlSystem Test Aquazone Deluxe D Control LED IndicaFault Descriptions ServiceComplete C Control LED Code Gravity Flow Method a50-8586 Refrigerant Charging Air Coil Fan Motor RemovalSheave Alignment Unit Size Component Drive Package 50HQPTroubleshooting Thermistor Nominal ResistanceTroubleshooting Fault Heating Cooling Possible Cause SolutionUnit Does Not Operate Page Copyright 2010 Carrier Corporation START-UP Checklist II. START-UPHeating Cycle Analysis Cooling Cycle Analysis