Haws 9321 Guide

06/23 Model 9321/9321CE/9326/9326CE/9327/9327CE Page 1 of 32
INSTALLATION, OPERATION
&
MAINTENANCE INSTRUCTIONS
No. 0002080089 Rev 5
Model 9321/9321CE/9326/9326CE/9327/9327CE
Instantaneous Tankless Water Heater
NOTE TO INSTALLER: Please leave this information with the Maintenance Department.
SHOULD YOU EXPERIENCE DIFFICULTY WITH THE INSTALLATION OF THIS
MODEL PLEASE CALL:
TECHNICAL SUPPORT: + 1-800-766-5612
FOR CUSTOMER SERVICE: + 1-888-640-4297
HAWS-EMEA CONTACT P: + 41(0)34 420 60 00
1455 Kleppe Lane Sparks, NV 89431-6467 [phone] Fax [phone]
E-mail: [email protected]  website: www.hawsco.com
Distributed by Haws - EMEA P: + 41(0)34 420 60 00 website: www.Haws.ch
9326/9327 SHOWN 9321 SHOWN

Model 9321/9321CE/9326/9326CE/9327/9327CE
!
!
!
DANGER!
Indicates an imminently hazardous situation which, if not avoided,
will result in death or serious injury.
WARNING!
Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
CAUTION!
Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury.
Hot water can be dangerous.There is a high scald potential if the
thermostat is set too high.
Water temperatures over 125 °F (51 °C) can cause severe burns or
scalding resulting in death.
Hot water can cause rst degree burns with exposure for as little as:
3 seconds at 140 °F (60 °C)
20 seconds at 130 °F (54 °C)
8 minutes at 120 °F (48 °C)
DANGER: Once the unit is installed and
checked for water leaks, turn the breaker on and push the
power button to activate heater. Heater can be deactivat-
ed by pushing the power button one more time. When
the heater is powered on the electronic control will auto-
matically power the element when it senses water ow.
The temperature of the hot water delivered by the heater
depends on the wattage of the heating element, tem-
perature of the incoming cold water and the water ow
rate through the water heater. Reducing the ow rate
increases the outlet temperature and increasing the ow
rate reduces the outlet temperature.
It is important to keep in mind that all tankless water
heaters are subject to a maximum ow rate. The heater
will not be capable of heating water to desired tempera-
ture if the ow rate exceeds the heaters capability. In or-
der for the heater to operate properly, it must be careful-
ly matched to its application and aerators should be used
to limit water ow. See Table I to determine the maximum
ow rates and temperature rise for each model.
CAUTION: Outlet water temperature may be
higher when using the tankless heater at low ow rates or
when used with high inlet water temperature.
SAFETY
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Model 9321/9321CE/9326/9326CE/9327/9327CE
IMPORTANT SAFETY INFORMATION
READ ALL INSTRUCTIONS BEFORE USING
!
11. In accordance with NEC guideline, this water heater is
designed for a continuous duty cycle of 3 hours
at 100% power output. Exceeding this rating could
damage the heater and void the warranty.
12. Provide your heater with potable, uninterrupted supply of
water at a constant minimum pressure of 35 PSI
(2.4 bar) (based on model) and maximum pressure of 150
PSI (10.3 bar).
13. Use of Water Hammer Arrestors in applications required;
neglecting to do so will damage the heater and void the
warranty.
14. This heater must be in a location where it is not subject to
freezing temperatures unless supplied with factory installed
freeze protection.
15. Properly purge air out of system before power is applied.
Recommended to purge water through system for
minimum 2 minutes at a minimum 15 gpm (57 lpm),
closing and opening drain valve 3 times to move any
lodged air before power is applied.
16. This appliance is not intended for use by persons unless
they’re certified personnel or have been given proper
instruction and supervision.
17. This appliance cannot be played with by children. Install
to prevent children from playing with or around the
appliance.
18. Cleaning and user maintenance should only be per-
formed by trained and licensed professionals.
19. Sanitation models used in a circulator system, a 30
second factory set delay program will be installed
to establish flow before power is applied. Contact Haws
for information at [phone] or Haws - EMEA at
P: + 41(0)34 420 60 00
20. Applications with the use of a recirculation circulator must
be installed according schematics.
21. The use of Ethylene glycol antifreeze is strictly
prohibited. Propylene Glycol is the only recom-
mended antifreeze.
06/23 Page 3 of 32
1. You must read and follow all instructions. Serious bodily
injury or death could occur if you ignore this warning.
2. All circuit breakers and/or disconnect switches servicing
the heater must be turned off when installing, uninstall-
ing, or repairing this water heater.
3. The unit must be installed by a licensed electrician and
plumber.
4. The unit must be wired in accordance with the current
version of the National Electrical Code (US), Canadian
Electric Code (Canada) or IEC International Standards.
5. This installation must comply with all national, state, and
local plumbing and electrical codes.
6. When the heater is not within sight of the electrical circuit
breakers, an additional local means of disconnec-tion of
all ungrounded conductors must be provided that is
within sight of the appliance or a circuit breaker lockout
must be used. (Ref. NEC 422.31)
7. Per UL 499, this water heater is not required to be
installed with a Temperature and Pressure relief valve
(T&P). However, local codes may vary. In case a T&P relief
valve is required, it must be installed on the outlet hot
water line heater between the heater and the isolation
valve.
8. If the Haws tankless water heater is installed in a location
where water damage could occur in the event of a leak, it
is recommended that a drip pan be installed and
connected to a suitable drain. Alternatively, an active
water leak detector and shut off valve can be installed to
turn off your water supply in the event a leak is detected.
9. If water supply has a high mineral content, a water
softening system is recommended. Damage to the water
heater resulting from scale or hard minerals will not be
covered under warranty.
10. When the heater is installed in a well water system or if
the plumbing system is prone to introducing air into the
heater, it is highly recommended that an air sep-arator be
installed in the cold water feed to the heater to avoid
possible failure of the heating element and/or heating
chamber.

Model 9321/9321CE/9326/9326CE/9327/9327CE
PERFORMANCE FEATURES
TABLE OF CONTENTS
PERFORMANCE FEATURES ............................................................................ 4
MOUNTING THE HEATER TO THE WALL ....................................................... 6
ELECTRICAL SPECIFICATIONS ...................................................................... 8
PLUMBING HOOKUP .................................................. .....................................9
COMMISSIONING THE WATER HEATER ...................................................... 11
MONITORING & PREVENTIVE MAINTENANCE .......................................... 15
CONTROL FEATURES ................................................................................... 16
TROUBLESHOOTING PROCEDURES ........................................................... 18
TECHNICAL SUPPORT .................................................................................. 19
REPAIRS AND OPTIONS ............................................................................... 22
WIRING SCHEMATICS .................................................................................. 27
LIMITED WARRANTY INFORMATION .......................................................... 30
Heating Technology »Field Replaceable, non-ferrous, lead-free cartridge-style direct heating element
Safety and Reliability »Thermo-Optical sensor for protection against entrained air or improper commissioning
Materials and Construction »NSF-61 listed materials of construction
Control and Consumption
»Active energy management to ensure optimal application of energy based on real-time
system demands
»Multistage element turn-on
»Visual user interface for eld programming
Turn-on Flow Rate
»Integrated high-capacity ow meter
»Field adjustable maximum activation ow rate (minimum activation ow rate factory set
and is not eld adjustable.)
Pressure Rating »Operating pressure range not to exceed 60 – 90 PSI (4.1 – 6.2 bar).
Maximum pressure rating 150 psi (10.3 bar)
Available Enclosures
»Standard Cabinet (Non-Waterproof)
»N4 – NEMA 4 (Standard)
»N4X – NEMA 4X 304SS
»N4X6 – NEMA 4X 316SS
Class l Div II enclosures
Optional Features
for NEMA 4 and
4X Applications
»Indoor disconnect switch (fused or non-fused)
»Stand Kits (for freestanding applications)
»Alarm contacts
»GFCI
»Freeze Protection
»Remote Display
Page 4 of 32
06/23

Model 9321/9321CE/9326/9326CE/9327/9327CE
Temperature rise in GPM (° F)
Temperature rise in LPM (° C)
Emergency Eyewash applications Emergency Eye, Face, and Drench applications
Voltage kW
Rating
3 GPM
11 LPM
4 GPM
15 LPM
5 GPM
19 LPM
6 GPM
23 LPM
20 GPM
76 LPM
23 GPM
87 LPM
26 GPM
98 LPM
30 GPM
114 LPM
40 GPM
151 LPM
208 54 123° F
68° C 92° F 51° C 74° F 41° C 61° F 34° C 18° F 10° C 16° F 9° C 14° F 8° C 12° F 7° C 9° F 5° C
400 50 114° F
63° C 85° F 47° C 68° F 38° C 57° F 32° C 17° F 9° C 15° F 8° C 13° F 7° C 11° F 6° C 9° F 5° C
400 75 •128° F
71° C 102° F 57° C 85° F 47° C 26° F 14° C 22° F 12° C 20° F 11° C 17° F 9° C 13° F 7° C
400 100 • • 136° F
76° C 114° F 63° C 34° F 19° C 30° F 16° C 26° F 15° C 23° F 13° C 17° F 9° C
400 120 • • • 136° F
76° C 41° F 23° C 36° F 20° C 32° F 18° C 27° F 15° C 21° F 12° C
480 54 123° F
68° C 92° F 51° C 61° F 34° C 49° F 27° C 18° F 10° C 16° F 9° C 14° F 8° C 12° F 7° C 9° F 5° C
480 72 •123° F
68° C 82° F 46° C 66° F 37° C 25° F 14° C 21° F 12° C 19° F 11° C 16° F 9° C 12° F 7° C
480 108 • • 123° F
68° C 98° F 54° C 37° F 21° C 32° F 18° C 28° F 16° C 25° F 14° C 18° F 10° C
480 126 • • • 115° F
64° C 43° F 24° C 37° F 21° C 33° F 18° C 29° F 16° C 22° F 12° C
600 61 139° F
77° C 104° F 58° C 83° F 46° C 69° F 38° C 21° F 12° C 18° F 10° C 16° F 9° C 14° F 8° C 10° F 6° C
600 102 • • 139° F
77° C 116° F 64° C 35° F 19° C 30° F 17° C 27° F 15° C 23° F 13° C 17° F 9° C
600 130 • • • 118° F
66° C 44° F 24° C 39° F 22° C 34° F 19° C 26° F 14° C 22° F 12° C
600 150 • • • • 51° F
28° C 45° F 25° C 39° F 22° C 34° F 19° C 26° F 14° C
How the Haws Tankless Water Heater Works
Operating the new Haws tankless water heater is similar to using any traditional water heater system. However,
it is very important that all of the set-up procedures and operating instructions are carefully read to ensure maximum
performance and energy savings from the water heater.
The Haws tankless water heater does not store hot water like a conventional tank-type water heater. It contains high
powered bare wire technology heating elements that are capable of heating water instantly on-demand. Whenever
there is a hot water demand, the patented ow meter within the heater recognizes the demand and initiates the heat-
ing process. This meter measures the water ow rate while two thermistor sensors measure the incoming and outgoing
water temperature. This information is transmitted continually to the microprocessor controller which determines the
precise amount of power to send to the heating elements to heat the water to the desired temperature. The Haws
tankless water heater only uses as much power as is needed to meet the demand by fully modulating the heating
elements from 0 to 100%.
It is important to keep in mind that all tankless water heaters are subject to a maximum ow rate. If this ow rate is
exceeded, the heater will not be capable of fully heating water. The amount of water that can be heated by the tankless
water heater at any given time will depend on the model selected and the incoming water temperature. See diagram
on below to determine the maximum ow rates. Since a tankless water heater eliminates the ongoing thermal losses
caused by storing hot water in a tank, there will be a signicant energy savings compared to a conventional tank type
water heater.
Eye/Face Wash & Drench Showers
• Temperature electronically limited to factory preset not exceed temperature .
PERFORMANCE FEATURES
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Model 9321/9321CE/9326/9326CE/9327/9327CE
Please follow the mounting instructions as appropriate to your installation. Haws recommends the heater
be installed close to the point of use.
!
Make sure the brass ttings are at the bottom of the heater. No other heater orientation is permitted.
10” (25cm) Top Clearance
18” (46cm) Clearance
8” (20cm) Clearance8” (20cm) Clearance
The 9321/9321CE/ 9326/9326CE/9327/9327CE series is approved for zero clearance to
combustibles. Above clearances recommended for service and installation.
Haws recommends your heater be installed or serviced by a licensed plumber and electrician.
CAUTION
This heater must be installed in a location where it is not subject to freezing temperatures, unless
supplied with factory installed freeze protection
MOUNTING THE HEATER TO THE WALL
Page 6 of 32
06/23
9321 Shown

Model 9321/9321CE/9326/9326CE/9327/9327CE
This heater must have its own independent circuit using insulated, UL listed wire conductors of the
appropri-ate size suitable for up to 90° C (194° F) and protected by the correctly rated circuit breaker.
See chart on next page.
The power conductors are to be secured to the L1, L2 and L3 connectors on the terminal block (Fig. 1) or
contactor (Fig. 2). The ground is to be secured to the GND connector to the right of the terminal block.
Fig. 1 Fig. 2
!WARNING
FAILURE TO GROUND THE SYSTEM MY RESULT IN SERIOUS INJURY, DEATH AND/OR PROPERTY
DAMAGE.
!WARNING
Before beginning any work on this installation, BE SURE THAT THE ELECTRICAL BREAKER IS “OFF” AND
THAT ALL MOUNTING AND PLUMBING WORK HAS BEEN COMPLETED PER THESE INSTRUCTIONS.
Before starting any electrical work VERIFY there is no power at the heater before proceeding.
STOP
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Model 9321/9321CE/9326/9326CE/9327/9327CE
VOLTAGE
(DELTA)
POWER
(KW) AMPS RECOMMENDED WIRE SIZE
TURN-ON
(GPM/LPM) PHASE NPT FITTING
208v 3Ø 54 150A/phase 1/0 AWG 1.5
5.67 THREE 1.25”
400v 3Ø 50 73A/phase 4 AWG 1.5
5.67 THREE 1.25”
400v 3Ø 75 109A/phase 2 AWG 2.5
9.46 THREE 1.25”
400v 3Ø 100 145A/phase 1/0 AWG 2.5
9.46 THREE 1.25”
400v 3Ø 120 174A/phase 2/0 AWG 2.5
9.46 THREE 1.25”
480v 3Ø 54 65A/phase 4 AWG 1.5
5.67 THREE 1.25”
480v 3Ø 72 87A/phase 3 AWG 2.5
9.46 THREE 1.25”
480v 3Ø 108 130A/phase 1 AWG 2.5
9.46 THREE 1.25”
480v 3Ø 126 151A/phase 2/0 AWG 2.5
9.46 THREE 1.25”
600v 3Ø 61 59A/phase 6 AWG 2.5
9.46 THREE 1.25”
600v 3Ø 102 98A/phase 3 AWG 2.5
9.46 THREE 1.25”
600v 3Ø 130 125A/phase 1 AWG 2.5
9.46 THREE 1.25”
600v 3Ø 150 144A/phase 1/0 AWG 2.5
9.46 THREE 1.25”
Eye/Face Wash & Drench Showers
A green terminal (or a wire connector marked “G”, “GR, “Ground”, or “GROUNDING”) is provided within
the control box. To reduce the risk of electric shock, connect this terminal or connector to the grounding
terminal of the electric service or supply panel with a continuous copper wire in accordance with your local
electrical code.
ELECTRICAL SPECIFICATIONS
Page 8 of 32
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Model 9321/9321CE/9326/9326CE/9327/9327CE
!
MUST FLUSH LINE A MINIMUM 5 MINUTES, AT A MINIMUM 15 GPM (
57 LPM)
ON INITIAL STARTUP
The heater is equipped with
NPT brass ttings.
Make sure ONLY NPT ttings are
used for connection to this heater.
Connect the cold water line with the
inlet connection (RIGHT tting).
Connect the outlet pipe with the
outlet tting (LEFT tting).
Do not reverse connections.
Hot Water
Out
Cold Water
In
PRV VENT LOCATION
The PRV Vent is not a code compliant pressure relief valve.
Check local codes to see if a code compliant Temperature
and Pressure relief valve is required in your installation.
!CAUTION
Never use pipe dope when making plumbing connections to this heater. Follow standard industry
practice with careful application of Teon tape. Do not allow Teon tape to get into the heater.
!CAUTION
Never solder any pipe connections while attached to this heater – damage to the heater will result.
Doing this will void the warranty.
PLUMBING HOOKUP
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Model 9321/9321CE/9326/9326CE/9327/9327CE
WARNING
CONSTITUENT (mg / L) MAXIMUM ALLOWABLE BETTER BEST
Alkalinity 50 25 10
Calcium 2.5 5 0.5
Carbon Dioxide 0 0 0
Chlorine 100 15 1
Free Chlorine 1 1 0.05
Iron 0.2 0.1 0.01
Magnesium as Mg 0.5 0.1 0.1
Magnesium as Mn 0.1 0.1 10
Nitrate 25 25 10
Oxygen 2 1 0.1
Silica 15 10 1
Sodium 50 10 1
Sulfate 25 25 1
TDS 200 100 5**
Total Hardness (Grains per Gallon) 25 10 1
Total Hardness (Grains per Liter) 114 45 4.5
pH 6.5-8.5 6.5-8.5 6.5-8.5
Turbidity (NTU) 5 5 1
Proper water conditions must be maintained to prevent damage to the water heater.
* NOTE: Total dissolved solids
** NOTE: Do not reduce the TDS beyond this amount or the water will be too aggressive
!
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!
MUST FLUSH OUT WATER HEATER FOR MINIMUM
5 MINUTES AT A MINIMUM 15 GPM (57 LPM) ON
INITIAL START UP OR AFTER ANY SERVICE WORK HAS
BEEN PERFORMED.
CLOSE AND OPEN DRAIN VALVE 3 TIMES TO REMOVE
ANY LODGED AIR BUBBLES. FAILURE TO DO SO MAY
DAMAGE THE HEATER.
MINIMUM INLET WATER PRESSURE 35 PSI (2.4 BAR)
DYNAMIC.
MAXIMUM WATER PRESSURE NOT TO EXCEED 150 PSI
(10 BAR). RECOMMENDED OPERATING PRESSURE
60 – 90 PSI (4.1 – 6.2 BAR).
USE OF A PRESSURE REGULATOR RECOMMENDED.
THE USE OF DI-ELECTRIC UNIONS MUST BE USED
ON THE INLET AND OUTLET PORTS OF THE WATER
HEATER. IF HEATER IS TO BE USED IN A RECIRCULA-
TORY LOOP, A 40 MESH (1/64” / 0.4MM OR SMALLER)
Y-STRAINER MUST BE INSTALLED IN COLD WATER
INLET TO PREVENT DEBRIS FROM ENTERING THE
WATER CHAMBERS.
WATER SUPPLY INLET PIPING MUST BE A MINIMUM 1
¼” (3.175 cm) PIPE DIAMETER AND IT MUST BE A
DEDICATED SUPPLY LINE. 2 ½” (6.35 cm) MINIMUM PIPE
DIAMETER ON TRUNK MAIN WHEN PART OF A BRANCH
SYSTEM.
BLOCKAGE CAUSED BY DEBRIS MAY CAUSE ELEMENT
FAILURE. ISOLATION VALVES RECOMMENDED FOR
SERVICING.
IN APPLICATIONS WHERE A LONG DUTY CYCLE IS
NEEDED (MORE THAN 3 HOURS CONTINUOUS RUN
TIME), OR A SHORT DUTY CYCLE (LESS THAN
30 SEC. ON TIME WITH LESS THAN MINUTE OFF TIME)
PLEASE CONTACT HAWS TECHNICAL SUPPORT AT
[phone] OR HAWS - EMEA P: [phone]
HAMMER ARRESTOR: SYSTEMS WITH A LARGE
WATER VOLUME, OR LONG LENGTHS OF PIPING, CAN
BE SUSCEPTIBLE TO WATER HAMMER. THE USE OF
SLOW ACTING VALVES ALONG WITH THE
INSTALLATION OF A WATER HAMMER ARRESTOR IS
HIGHLY RECOM-MENDED ON ALL UNITS. FAILURE TO
INSTALL A WATER HAMMER ARRESTOR CAN CAUSE
DAMAGE TO WATER HEATER AND VOID WARRANTY.
REFER TO MANUFAC-TURER’S INSTALLATION MANUAL
FOR PROPER SIZE AND INSTALLATION LOCATION.
!
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Model 9321/9321CE/9326/9326CE/9327/9327CE
COMMISSIONING THE WATER HEATER
CAUTION
BEFORE SWITCHING THE ELECTRICAL BREAKER “ON”, MAKE SURE THE INLET AND OUTLET BALL
VALVES ARE FULLY OPEN AND WATER IS FLOWING THROUGH ALL POINTS OF USE FOR A MINIMUM
OF 5 MINUTES AT A MINIMUM 15 GPM (57 LPM). Open and close drain valve 3 times while purging
to remove any lodged air bubbles. DO NOT SWITCH THE BREAKER “ON” IF THERE IS ANY POSSIBILITY
THE WATER IN THE HEATER IS FROZEN.
After verifying the heater has been purged of air (see above) turn the circuit
breaker/disconnect “ON” and observe the start-up sequence on the display. The
LCD screen will display the SETPOINT TEMPERATURE in degrees F or degrees C.
Below the display are 4 push buttons that are used to control
the function of the heater. Press the UP or DOWN buttons to
establish your desired temperature. Refer to the CONTROL
FEATURES section of this manual for additional information.
!
>
>
>
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Model 9321/9321CE/9326/9326CE/9327/9327CE
Startup Process
Plumbing Installation Checklist MUST BE FILLED OUT AND LEFT WITH WATER HEATER. MUST FLUSH WATER HEATER
FOR MINIMUM 5 MINUTES.
STEP CATEGORY ACTION CONFIRMED BY NOTES
1 Water Heater is supplied with clean potable water
2 Water Plumbing orientation is correct – water connections on the bottom - inlet on the right,
outlet on the left
3 Water Ensure piping connections are not causing stress or torque on the inlet and outlet ttings
4 Water No leaks at water connection or in plumbing network
5 Water Water pressure is between 60-90 PSI (min.35 psi) (4.1-6.2 bar (min. 2.4 bar))
6 Water
Long pipe runs, high flow rates and valves closing can cause pressure spikes
(water hammer) above 1000 PSI (68.9 bar) Consult piping schematic to
ensure arrestors and regulators are properly sized and located.
7 Water
(with power off) Open supply valves to water heater -
run water through xtures to purge all air and debris in system. With water owing,
visually inspect the clear element tubes between the inlet and outlet manifold to ensure
no air bubbles are present. (this may take several minutes)
8 Water Using a ashlight, visually inspect heating chamber for any signs of leakage
9 Water Ensure Water Heater will not freeze
10 Water Ensure all local plumbing codes are met
11 Water Plumbing installation correct and complete
!IMPORTANT
Read and fully understand all steps outlined below before proceeding. Failure to do so may damage
the water heater and void any warranty. Haws Technical support is available at + 1-800-766-5612 or
Haws - EMEA P: + 41(0)34 420 60 00
PLUMBING INSTALLATION CHECKLIST
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Model 9321/9321CE/9326/9326CE/9327/9327CE
STEP CATEGORY ACTION CONFIRMED BY NOTES
20 Startup Water requirements (Steps 1-11) are conrmed
21 Startup Electrical requirements (Steps 12-19) are conrmed
22 Startup Plumbing Codes and Electrical Codes are met and conrmed
23 Startup
(with power off) Open supply valves to water heater - run water through xtures to purge all air
and debris in system. With water owing, visually inspect the clear element tubes between the
inlet and outlet manifold to ensure no air bubbles are present. (this may take several minutes)
Chugging or burping of water is also an indication of air
24 Startup Turn off water ow at all xtures, keeping water heater supply valves open
25 Startup Apply power to water heater
26 Startup Turn water ow on at xtures
27 Startup LCD display board is illuminated
28 Startup Contactors engaged (audible click)
29 Startup No error codes
30 Startup Scroll through display (If display is locked, consult manual for unlock procedure)
31 Startup Adjust settings if needed. Note - Keep temperature setting as low as possible for scald
potential and minimizing abuse on the heater
32 Startup Conrm TURN-ON setting meets xture ow rate
33 Startup Conrm SETPOINT setting on display
34 Startup Conrm ACTUAL TEMP output on display
35 Startup If SETPOINT does not match ACTUAL TEMP then use the TEMPERATURE RISE CHART in manual along
with LOAD%, INLET TEMP and FLOW RATE on display to determine the maximum theoretical output
36 Startup Shut water ow off at xture
37 Startup Power disengaged (audible)
38 Startup Repeat startup steps 25-28 to ensure proper activation and performance
39 Startup Water heater installed correctly and operating as designed
STARTUP PROCEDURE AND CHECKLIST
ELECTRICAL INSTALLATION CHECKLIST
STEP CATEGORY ACTION CONFIRMED BY NOTES
12 Power (with power off) - Breaker and disconnect are of proper size and correctly installed
13 Power (with power off) - Wiring and conduit are of proper size and correctly installed
14 Power (with power off) - Wiring connections at terminals are correct orientation, tight,
with no stray wire strands or pinched sheathing
15 Power (with power off) - Proper ground (not neutral) is clean, and tight
16 Power (no water owing, do not turn it on, close outlet water shut off valve if uncontrolled environ-
ment-left hand side) Apply power - ensure voltage and phasing is according to model rating
17 Power Disengage power after voltage and phasing is conrmed
(open outlet shutoff valve if closed during step 16)
18 Power Ensure all local electrical codes are met
19 Power Electrical Installation correct and complete
!IMPORTANT
Read and fully understand all steps outlined below before proceeding. Failure to do so may damage
the water heater and void any warranty. Haws Technical support is available at + 1-800-766-5612 or
Haws - EMEA P: + 41(0)34 420 60 00
ELECTRICAL INSTALLATION CHECKLIST
Page 13 of 32
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Model 9321/9321CE/9326/9326CE/9327/9327CE
STEP CATEGORY ACTION CONFIRMED BY NOTES
NORMAL SHUT DOWN PROCEDURE
1 Normal
Shut power off to unit in order of sequence - In-door (on-door)
disconnect (if applicable), local disconnect, main breaker -
perform lock out procedure per facilities requirements
2 Normal Close applicable water valves - Inlet and outlet
(water heater will not be drained)
EMERGENCY SHUT DOWN PROCEDURE
1 Emergency
Shut power off to unit In-door (on door) disconnect
(if applicable) or local disconnect
2
Emergency Shut water valves off - inlet and outlet (water heater will not be drained)
3
Emergency Complete lock out procedures per facilities requirements
4
Emergency Notify all parties involved that water heaters are shut down
LONG TERM SHUT DOWN PROCEDURE
1 Long-Term
Shut power off to unit in order of sequence - In-door (on-door)
disconnect (if applicable), local disconnect, main breaker -
perform lock out procedure per facilities requirements
2
Long-Term Close applicable water valves - Inlet and outlet
3
Long-Term
Drain water heater through plumbing network, run compressed air through
the water heater to ensure the heater is completely drained
4
Long-Term Lock out all applicable water valves per facilities procedures
SHUT DOWN PROCEDURE (Normal, Emergency, and Long Term)
Page 14 of 32
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Model 9321/9321CE/9326/9326CE/9327/9327CE
RECOMMENDED ROUTINE INSTRUMENT READINGS AND OPERATION CHECKING:
Please note the instrument readings are performed during water heater operation. No readings are required when
the unit is not being used. Check the following readings on the Remote display and ensure proper performance:
• Inlet temperature
• Temperature set point
• Actual outlet temperature
• Actual GPM / LPM
• Error codes
EARLY WARNING SIGNS OF DEVELOPING OPERATIONAL OR EQUIPMENT PROBLEMS:
• Based in the readings from the Startup Procedure on page 13, water heater unit appears
to be performing properly, however there are error codes
• Actual ow rate appears to be lower than desired
PROCEDURES FOR HANDLING NON-ROUTINE PROBLEMS SUCH AS ALARMS, POWER FAILURE,
AND COMPONENT FAILURE:
• Power failure will result in a non-operable system – restore power and startup unit per
Startup Process on page 13
• Component failure will result in repeat error codes. Refer to manual page 18
for error codes and corrective action
PREVENTATIVE MAINTENANCE REQUIREMENTS:
(PMR) Preventive maintenance requirements may impact other items of the installation such as electrical supply
and wiring, water piping and associated valves and controls. Haws water heaters are very low maintenance.
Ensure that the water heater is supplied with a clean potable, consistent water supply as outlined in the
Installation, Operation, and Maintenance Manual.
Check lter screen or associated y-strainer or other pre-lters to ensure clear water supply within listed water pressure.
Ensure proper electrical supply as outlined within the Installation, Operation, and Maintenance Manual.
PMR per site requirements, not to exceed 90 days.
MAINTENANCE INSPECTION PROGRAM:
(MIP) Haws water heaters are very low maintenance. Ensure PMR is completed every 90 days.
Disable power to the unit via external disconnect or local disconnects. Per site lockout procedures open cabinet door
and visually inspect components for signs of damage associated with possible water leaks, excessive heat or external
factors that could impact the water heater and associated components.
MONITORING & PREVENTIVE MAINTENANCE
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Model 9321/9321CE/9326/9326CE/9327/9327CE
PUSH BUTTON FLOW CHART
1) The SETPOINT TEMP or ACTUAL TEMP screen can be selected for display as the home screen.
Either of these screens will remain on the display when the backlight timer expires.
2) There is a 5-minute time delay built into the control. Regardless of which screen is being
displayed, after 5 minutes of inactivity, the display will revert to the SETPOINT TEMP screen.
3) The 4 push buttons are used to control the operation of the heater. The LEFT and RIGHT
buttons shift the display from one screen to another. The DOWN and UP buttons may change
the values within selected screens.
4) As an example, when the screen displays SETPOINT TEMP, the desired hot water tempera-
ture will increase 1 degree for each press of the UP button and decrease 1 degree for each
press of the DOWN button. Note that minimum and maximum set point temperatures are
established at the factory.
5) The LEFT and RIGHT buttons shift the display from one screen to another. From the INLET
TEMP screen, one press of the RIGHT button will shift the display to the SETPOINT TEMP
screen. INLET TEMP shows the actual temperature of the water entering the heater.
6) From the SETPOINT TEMP screen, one press of the RIGHT button will shift the display to the
ACTUAL TEMP screen. This shows the actual temperature of the water leaving the heater.
7) From the ACTUAL TEMP screen, one press of the RIGHT button will shift the display to the LOAD
PCT screen.This shows the electrical power consumption as a percentage of full power.
8) From the LOAD PCT screen, one press of the RIGHT button will shift the display to the
FLOWRATE screen. This shows the rate of ow of water through the heater.
9) From the FLOWRATE screen, one press of the RIGHT button will shift the display to the UNITS
screen. This shows the units of measure in either the ENGLISH or METRIC systems. ENGLISH
units are degrees Fahrenheit and gallons per minute. METRIC units are degrees Celsius and
liters per minute. Use the UP and DOWN buttons to select the desired units of measure.
10) From the UNITS screen, one press of the RIGHT button will shift the display to the
SOFTWARE VERSION screen.This shows the version level of the software in the control.
11) From the SOFTWARE VERSION SCREEN, one press of the right button will shift the display
to the ERRORS screen. This shows the error history of the heater. “0 ERRORS” means that no
errors have occurred.
If the heater has an error history of 4 errors: this history will be displayed on the screen as
shown. “CODE 1:E0” refers to the rst error and indicates it to be an E0 error. One press of
the UP button will show the second error as “CODE 2:E0” error.
Continued pressing of the UP or DOWN buttons will scroll through each of the errors in the
history (in this case a total of 4). ERRORS indicate an undesirable condition but will not shut
down the operation of the heater.
!CAUTION
BEFORE USING THIS CONTROL, make sure all prior installation steps have been properly completed,
electrical power is on and water is present in the heater.
CONTROL FEATURES
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Page 16 of 32
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Model 9321/9321CE/9326/9326CE/9327/9327CE
ERROR CODES
E0: Excessive water ow detected
Corrective action: Using the OUTLET BALL VALVE, slowly reduce water ow until the desired temperature
is achieved. The temperature is proportional to the ow through the heater; the lower the ow, the higher
the temperature and vice versa.
01( FAULTS are communicated through the LCD display. The display will switch from the
SETPOINT screen to the FAULT screen and back again every 3 seconds. FAULTS indicate
an undesirable condition and will immediately shut down the operation of the heater. If
faults are appearing on your heater call Haws Technical Support for assistance at
[phone] or Haws - EMEA call P: + 41(0)34 420 60 00.
FAULT CODES
E0: Excessive water ow detected
F1: No change in water temperature detected
F2: Dry re detected - Optical Sensor Tripped
F3: Excessive dry re occurrences detected
F4: Inlet thermistor out of range
13) The security of the heater settings is provided by pressing and holding the LEFT and UP
buttons for 3 seconds to lock the buttons. Once locked, the buttons have no function. Press
and hold the same LEFT and UP buttons for 3 seconds to unlock the buttons.
The security status can be checked at any time by pressing any one button. If the system is
locked, the screen will display “BUTTONS LOCKED”.
14) The display can be turned off or on. Press and hold the DOWN and RIGHT buttons for 3
seconds. If the display is off, it can be turned on by pressing and holding the same DOWN
and RIGHT buttons for 3 seconds.
!CAUTION
Keep the INLET BALL VALVE fully “OPEN”. NEVER RESTRICT THE WATER FLOW USING
THE INLET VALVE.
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Model 9321/9321CE/9326/9326CE/9327/9327CE
TROUBLESHOOTING PROCEDURES
If you need any assistance from our Technical Service Department, make sure you can identify this water heater by
having the model number and serial number.
Model No. __________________________________
Serial No. __________________________________
PROBLEM POSSIBLE
CAUSES ACTION IF TRUE
PROCEED TO ACTION
IF FALSE
PROCEED TO ACTION
Unit does
not power
on
Main Power
issue A1 Check main power supply voltage is within +/- 5% of nominal.
Check breaker and wire size A2 Provide the correct supply
voltage to the heater
Blown Fuse A2 Check all fuses for continuity A3 Check voltages and elements,
replace fuse
Transformer overload A3 Check circuit breaker on 24V control transformer A4 Check voltages and for failed PCB, Contac-
tors- reset transformer
Printed circuit board (PCB) A4 Verify main PCB is plugged in at P16 Replace PCB Check connection, and reset connector
Display
ERROR E1
Water temperature entering
heater is above SETPOINT
A5 Verify supply water supply temperature is below set point. Note - Heater will
automatically engage when incoming water drops below set point. A6 Adjust supply temperature
below set point
Loose PCB connection
or pinched wire
A6 Check PCB connection at P7 and check wire routing A7 Check connection, and reset connector
Inlet thermistor failure A7 Check thermistor for proper placement in well Replace thermistor Re-seat thermistor in well
Display
FAULT F0
Outlet thermistor out
of range A8
Check PCB connection at P7 and check wire routing A9 Check connection, and reset connector
Outlet thermistor is
damaged, or wire is cut
A9 Check thermistor, wire, or connector for damage Replace thermistor A10
Heater is frozen A10 Verify supply and feed lines are not frozen Un-freeze heater and check
functionality
Display
FAULT F1
No change in water
temperature detected
A11 Verify change in temperature by checking ACTUAL TEMP vs INLET TEMP Lower ow rate to allow heater
to operate in range of capability A12
Thermistor failure A12 Follow actions A5-A7 A13
Thermal trip at
ECO/ Damaged wire A13 Power off, Using a multimeter check continuity at
PCB P17 pins 1 and 3. Check all wires for loose connection A14
No continuity veries a thermal trip.
Shut down power and allow to cool. Verify
connector is seated
Flow rate is too high A14 Check LOAD PCT for 100% load Reduce ow rate, heater is operat-
ing outside of capability A15
Element failure A15 Power off, Using a multimeter check continuity at between
red and black wires at each element chamber 16 No continuity- replace heater element.
Check water quality
Heating Elements
not modulating A16
Verify SSR/Triac functionality by checking current draw off each
SSR/Triac by means of an amp clamp. Also verify signal wires are
connected from PCB P2, P3, and P4
No current draw- replace SSR/ Triac
Display
FAULT F2
Ambient light is causing
the optical (overheat)
sensors to trip.
A17 Unit is to be operated with the cover on or (if NEMA equipped) door closed when
power is applied to the unit. A18 Close door, or reinstall cover
Air is present in the
heating chamber A18
Verify air is not present in the system by checking for a red led light on the heating
chamber. Look between the black manifolds into the clear tube sections for air
bubbles.
Remove air by installing an air
scrubber prior to heater, or ushing
system thoroughly before use.
Check all wire connections
Replace light sensor board
Loose /cut wire to
optical sensors A19
Verify 5VDC is present on the last optical sensor in the chain by using a
multimeter set for dc voltage at the connector P12 with one meter lead
on the red wire and the other on the black wire.
Check A17 and A18 again Call Haws for support
Display
FAULT F3
Multiple dry re conditions
detected (FAULT F2) more
than 3 times
A20 Recheck actions A17-A19. Shut down power and restart Replace main PCB and light sensor boards
Display
FAULT F4
Inlet thermistor
out of range A21 Verify inlet thermistor is properly seated in thermal well
Verify inlet temperature is not
below freezing, above set point
temperature, or heater is piped
backwards
Replace thermistor inlet or outlet or both
No Heat
Turn-on ow rate
not satised A22 Toggle through display to verify FLOWRATE and TURN-ON Increase water ow rate above
TURN-ON setting Check wiring to owmeter
Display states
FLOW ??? A23 Power off unit, and verify no faults are found. Verify ow meter harness is seated in
terminal P12 on the main PCB and at ow meter PCB
Call Haws for support, firmware
reload may be required If faults found reference above
Note: Error code history is not self-clearing. Unit keeps track of past errors. Error codes do not necessarily mean there is a current error.
Call [phone]
[e-mail] or
Haws-EMEA Call P: + 41(0)34 420 60 00
www.Haws.ch
Page 18 of 32
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Model 9321/9321CE/9326/9326CE/9327/9327CE
TECHNICAL SUPPORT
TECHNICAL SUPPORT FORM -- Perform steps below before calling
Haws services
Water Heater Model No. ______________________ Serial No. ________________________________________
Inlet Water Pressure __________________________ Inlet Water Temperature ___________________________
INCOMING VOLTAGE TESTING ELEMENTS
Amp draw on each heating
element, place clamp on
each red wire on inlet side
of contactor.
E4 ________
E5 ________
E6 ________
Fig 1 Fig 2
Ohm out heating elements: place #1
lead on 1 terminal on right side of SSR
(FIG 1); place #2 lead (FIG 2) on the
matching numbered red wire on outlet
side of contactor.
INCOMING ELEMENTS TESTING ELEMENTS
Wire
#1
TAG
GPM FLOW RATE ________ LOAD PERCENTAGE _____
E1 ________
E2 ________
E3 ________
L1 ________
L2 ________
L3 ________
Page 19 of 32
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Model 9321/9321CE/9326/9326CE/9327/9327CE
TECHNICAL SUPPORT CONT.
TESTING POINTS
Ohm out optical sensors: nd jack plug p5 on circuit board and place #1 lead on the blue wire, then
place #2 lead on the on the blue wire on the back right optical board. Move #2 lead to each blue
wire on optical boards to verify continuity. Repeat with black wire.
LEAD PLACEMENT:
Test blue and black
separately. Put 1 lead
on blue wire on P5 plug
then other lead goes to
each blue wire along
optical sensors.
Repeat with black wire.
TEST ECO’S (ELECTRIC CUT OFFS):
To check ECO’S, on jack plug P17 put leads between top and bottom contact.
If no continuity, then check across each ECO
TESTING OPTICAL SENSORS
Test points
for individual
ECO
Test points
to check all
ECOs
Page 20 of 32
06/23