ZURN AQUA-GARD ZW1070/15 Maintenance and service guide

INST201702_TMV_ZW1070
ZURN.COM.AU
AQUA-GARD
Thermostac Mixing Valves
INSTALLATION & MAINTENANCE
INSTALLATION INSTRUCTIONS
It is suggested that the device be installed to deliver water to the
end user. It is to be used for the final control of water tempera-
ture at plumbing fixtures and appliances. This Australian
Standards compliant device is to be used for point of use. It is
designed to mix cold water and hot water from the water heater
to a safer temperature range of 35-46°C.
1. Flush the Hot and Cold delivery lines completely before
installing the device.
2. The device can be installed in any posion. Note: the inlet hot
supply is to be connected to the “H” side of the valve and the
cold supply side to the “C” side.
3. The valve is to be fied to deliver mixed water to a single
outlet.
4. To set the temperature on the valve remove the pro- tecve
blue cap. The cap can be removed by inserng a small blade
screw driver into the slot at the base of the blue cap and
lightly push up.
Using an adjustable wrench or combinaon wrench, rotate the
flats clock- wise to lower the temperature or counter-clock
wise to increase the set temperature. Read temperature using
a thermometer.
5. Verify the set temperature by running a plumbing fixture and
reinstall the protecve plasc cap to the device. For bathroom
operaon set the maximum temperature not to exceed
35-46°C.
PERFORMANCE
Outlet Temp. Range 35-46°C
Temperature Hot Supply 49-90°C
Temperature Cold Supply 4-24°C
Set Temperature Accuracy +/- 1.8°C
Max. Working Pressure (inlet) 1000kPa
Temperature must be field set
Max. Working Pressure (Dynamic) 10-500kPa
Max. Pres. Differenal Hot/Cold Inlets 103kPa
Flow rate @ 310kPa pressure loss 0.63 l/s
Min. Flow Rate 0.31 l/s
MIXED
C
H
HC
C
C
H
MIXED
SENSOR F
AUCET
INDIVIDUAL USE SINGLE USE
PIPING INSTRUCTIONS
The device is designed to be installed at a single outlet. It may be
used to supply individual outlets when there is sufficient supply
pressure. It is suggested to use ball valves on the Hot and Cold
inlet supplies.
CAUTION: Installaon of water temperature control products
must be performed by qualified, licensed personnel. The qualified
installer should be sure that the proper device has been selected
for the proper installaon. A faulty installaon can cause scalding,
NOTICE: Annual inspecon and maintenance is required of all
plumbing system components. To ensure proper performance
and maximum life, this product must be subject to regular
inspecon, tesng and cleaning.
WARNING! Water Temperatures in Excess of 50°C Are
Dangerous and Will Cause Scalding, Severe Injury or Death!
This valve is Not Factory preset. To deliver a safe mixed water
temperature at the outlet, the installer must use a thermometer at
the outlet to verify the temperature. Set the outlet temperature
WARRANTY: ZURN WILKINS Valves are guaranteed against defects of material or workmanship when used for the services recommended. Please
refer to the LWG Zurn/ Zurn Wilkins Product Warranty Statement for details.
MIX
A
C
B
HC
MODEL INLET &
OUTLET
DIMENSIONS (approx) WEIGHT
AB C
mm mm mm kg
ZW1070/15 15mm BSPP 138 86 172 1.39
ZW1070/20 20mm BSPP 140 89 172 1.48
DIMENSIONS & WEIGHTS

INST201702_TMV_ZW1070 ZURN.COM.AU
TROUBLESHOOTING
MATERIALS
Body Bronze ASTM B 584
UNS C84400, nickel plated
Internal brass Brass ASTM B-16 UNS C36000
Piston Polysufone
Guide Tube Noryl GFN2
Spring & Screen 300 Series Stainless Steel
Seals Viton
Checks Noryl GFN2
MAINTENANCE
SERVICING THE STRAINERS
The strainers on the inlet supplies can be serviced by loosening the
union nuts, removing the valve from service and clean the screens
thoroughly with water aer disassembly. Where water quality is a
concern it may be necessary to install addional line strainers.
SERVICING THE CHECK VALVES
The check valves can be serviced by removing them from the body.
Flush the check valves thoroughly with water removing debris
from the seat and seat washers. Reinstall the check valve by
pushing them into the body flush to the body, spring first. Make
sure that the poppet and seat washer is facing you.
OPERATION
The valve internals themselves cannot be serviced. If the valve fails
it must be replaced. The funcon of the valve can be checked by
measuring the temperature of the water at the outlet nearest to
the valve. If the temperature is within +/- 1.8°C of the inial set
temperature, the valve is funconing correctly. If the temperature
has changed by more than +/- 1.8°C it is likely due to a build up of
debris in the stainers or a change in the supply condion.
ZURN AUSTRALIA
49 LAKESIDE DRIVE BROADMEADOWS VIC 3047
PHONE: 1300 00 ZURN
EMAIL: [email protected]
Removing Cap Temperature Adjustment
FLOW RATES (GPM )
PRESSURE LOSS (PSIG)
0
20
40
60
50 10 15 20
138
276
414
0. 03 .6 03 .951.3
PRESSURE LOSS (kpa)
FLOW RATES (l/s )
MODEL ZW1070 (STANDARD & METRIC)
FLOW CHARACTERISTICS
PROBLEM CAUSE SOLUTION
The desired mixed water temp. cannot be
obtained or valve is difficult to set
Hot and cold supplies are reversed, valve
is full of debris or strainers are fouled
Re-fit valve so H & C are correct, flush valve
with water and clean strainers
Mix. Temperature is unstable Strainers are fouled or fluctuang supply
pressure
Clean strainers and Install PRV's on
H & C inlet supplies
Mix Temperature changing over me Fluctuang supply pressures or strainers
are full
Install PRV's and clean strainers
Valve is set incorrectly Adjust mix. Temperature to 35°C - 46°C
No flow from the valve outlet Hot or Cold water supply failure or strainers
are fouled
Restore inlet supply & check mix.
Temperature and clean strainers
Flow rate reduced or fluctuang Valve or inlet fing fouled by debris Check valve and inlet fings for blockage
Mixed water temp. too Hot or Cold Valve has been tampered with, valve
incorrectly set, or inlet temperatures are
not within specified limits
Re-adjust to required set temp. to ensure
inlet temperatures are within specified
limits
Mixed water temp. does not change when
the temp. adjuster is moved
Hot and Cold supplies are reversed Refit the valve to correct Hot and Cold
Hot water flows into the cold water system
or vise versa
Check valve is fouled Clean strainers and remove debris
Valve is noisy Water velocity is too high Reduce water velocity
Either full Hot or Cold water flowing