Carrier Aquazone 50HQL Installation, Start-Up And Service Instructions Manual page 13

CONDITION
pH 7 to 9 range for copper. Cupro-nickel may be used in the 5 to 9 range.
Total Calcium and magnesium carbonate should not exceed 20 grains per gallon (350 ppm).
Hardness
Iron Oxides Less than 1 ppm.
Iron Bacteria No level allowable.
Corrosion*
Ammonia, Ammonium Hydroxide
Ammonium Chloride, Ammonium Nitrate
Ammonium Sulfate
Chlorine/Chlorides
Hydrogen Sulfide†
Brackish Use Cupro-nickel heat exchanger when concentrations of calcium or sodium chloride are greater than 125 ppm are present. (Seawater is
approximately 25,000 ppm.)
*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 has a pH of 7.0.
NOTE: To convert ppm to grains per gallon, divide by 17. Hardness in mg/l is equivalent to ppm.
AL — Alarm Relay Contacts
AL2 — Jumper Wire for Alarm
BC — Blower Contactor
CB — Circuit Breaker
CC — Compressor Contactor
CCH — Crankcase Heater
CO — Sensor, Condensate Overflow
ECR — Enthalpy Control Relay
ES — Enthalpy Sensor
— Sensor, Water Coil Freeze Protection
FP1
— Sensor, Air Coil Freeze Protection
FP2
— High-Pressure Switch
HP
— Hot Water Temperature Sensor
HWTS
JW1 or — Jumper, Alarm Mode
JW4
JW3 — Clippable Field Selection Jumper
LOC — Loss of Charge Pressure Switch
MAS — Mixed Air Sensor
OAT — Outside Air Thermostat
PDB — Power Distribution Block
*Optional wiring.
Water Automatic
Control Balance Valve
Valve
Boiler
Drains
Pressure-
Temperature
Plugs
Fig. 7 — Typical Ground-Water Piping Installation
Table 3 — Water Quality Guidelines
ACCEPTABLE LEVEL
LEGEND FOR FIG. 8A-10B
P1 — Field Wiring Terminal Block
RVS — Reversing Valve Solenoid
TRANS — Transformer
TXV — Thermostatic Expansion Valve
Factory Line Voltage Wiring
Factory Low Voltage Wiring
Field Line Voltage Wiring
Field Low Voltage Wiring
Printed Circuit Trace
Optional Wiring
Relay/Contactor Coil
Thermistor
Condensate Pan
Circuit Breaker
Expansion
Tank
Shut-Off
Valve
Strainer – Field-Installed Accessory
(16 to 20 mesh recommended for
filter sediment)
Max Allowable Level
0.5 ppm
0.5 ppm
0.5 ppm
0.5 ppm
None Allowable
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Water Out
Water In
From Pump
Coaxial Metal
Cu
Cu
Cu
CuNi
—
Ground
Solenoid Coil
Relay Contacts - N.O.
Relay Contacts - N.C.
Temperature Switch
Switch - Low Pressure
Switch - High Pressure
Wire Nut
Splice Cap
G LED