13
Table 3 — Water Quality Guidelines
*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.
CONDITION
ACCEPTABLE LEVEL
pH
7 to 9 range for copper. Cupro-nickel may be used in the 5 to 9 range.
Total
Hardness
Calcium and magnesium carbonate should not exceed 20 grains per gallon (350 ppm).
Iron Oxides
Less than 1 ppm.
Iron Bacteria
No level allowable.
Corrosion*
Max Allowable Level
Coaxial Metal
Ammonia, Ammonium Hydroxide
0.5 ppm
Cu
Ammonium Chloride, Ammonium Nitrate
0.5 ppm
Cu
Ammonium Sulfate
0.5 ppm
Cu
Chlorine/Chlorides
0.5 ppm
CuNi
Hydrogen Sulfide†
None Allowable
—
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.)
Pressure-
Temperature
Plugs
Boiler
Drains
Strainer – Field-Installed Accessory
(16 to 20 mesh recommended for
filter sediment)
Shut-Off
Valve
Water
Control
Valve
Automatic
Balance Valve
Expansion
Tank
Water Out
Water In
From Pump
Fig. 7 — Typical Ground-Water Piping Installation
*Optional wiring.
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
FP1
—
Sensor, Water Coil Freeze Protection
FP2
—
Sensor, Air Coil Freeze Protection
HP
—
High-Pressure Switch
HWTS
—
Hot Water Temperature Sensor
JW1 or
JW4
—
Jumper, Alarm Mode
JW3
—
Clippable Field Selection Jumper
LOC
—
Loss of Charge Pressure Switch
MAS
—
Mixed Air Sensor
OAT
—
Outside Air Thermostat
PDB
—
Power Distribution Block
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
Ground
Solenoid Coil
Relay Contacts - N.O.
Relay Contacts - N.C.
Temperature Switch
Switch - Low Pressure
Switch - High Pressure
Wire Nut
Splice Cap
LED
G
Summary of Contents for AQUAZONE VQL
Page 15: ...15 AQUAZONE THERMOSTAT Fig 8A 50HQL072 120 and 50VQL160 With Complete C Controls Typical ...
Page 16: ...16 AQUAZONE THERMOSTAT Fig 8B 50HQL072 120 and 50VQL160 with Deluxe D Controls Typical ...
Page 17: ...17 AQUAZONE THERMOSTAT Fig 9A 50VQL080 120 with Complete C Controls Typical ...
Page 18: ...18 AQUAZONE THERMOSTAT Fig 9B 50VQL080 120 with Deluxe D Controls Typical ...
Page 19: ...19 AQUAZONE THERMOSTAT Fig 10A 50VQL200 300 with Complete C Controls Typical ...
Page 20: ...20 AQUAZONE THERMOSTAT Fig 10B 50VQL200 300 with Deluxe D Controls Typical ...