Haws 9326 Bedienungsanleitung
INSTALLATION, OPERATION, AND
MAINTENANCE MANUAL FOR ELECTRIC TANKLESS WATER HEATERS
MODELS 9326 & 9327
0002080089, Rev 2
i
IMPORTANT SAFETY INFORMATION
READ ALL INSTRUCTIONS BEFORE USING
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 first 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)
ii
IMPORTANT SAFETY INFORMATION
READ ALL INSTRUCTIONS BEFORE USING
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, uninstalling,
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) or
Canadian Electric Code (Canada).
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
disconnection 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 93XX unit(s) 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.
iii
IMPORTANT SAFETY INFORMATION
READ ALL INSTRUCTIONS BEFORE USING
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 separator be installed in the
cold water feed to the heater to avoid
possible failure of the heating element
and/or heating chamber.
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 35PSI
(based on model) and maximum
pressure of 150 PSI.
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, closing
and opening drain valve 3 times to
move any lodged air before power is
applied.
16.
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 Services at (800) 766-5612.
17.Applications with the use of a
recirculation circulator must be
installed according schematics.
18.The use of Ethylene glycol antifreeze
is strictly prohibited. Propylene Glycol
is the only recommended antifreeze
iv
v
TABLE OF CONTENTS
PERFORMANCE FEATURES.................................................................................................................1
OPERATION PRINCIPLE......................................................................................................................3
MOUNTING THE HEATER TO THE WALL .............................................................................................4
ELECTRICAL HOOKUP ........................................................................................................................5
PLUMBING HOOKUP .........................................................................................................................7
COMMISSIONING THE WATER HEATER............................................................................................10
MONITORING & PREVENTIVE MAINTENANCE..................................................................................14
CONTROL FEATURES .......................................................................................................................15
TROUBLESHOOTING PROCEDURES ..................................................................................................18
TECHNICAL SUPPORT ......................................................................................................................20
INSTALLATION DRAWINGS...............................................................................................................24
WIRING SCHEMATICS......................................................................................................................38
1
PERFORMANCE FEATURES
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 field programming
Turn-on Flow Rate
Integrated high-capacity flow meter
Field adjustable maximum activation flow rate (minimum activation flow rate factory set and is not field
adjustable.)
Pressure Rating
Operating pressure range not to exceed 60 –90 PSI. Maximum pressure rating 150 psi
Available Enclosures
N4 –NEMA 4 (Standard)
N4X –NEMA 4X 304SS
N4X6 –NEMA 4X 316SS
Class l Div II enclosures
Optional Features for Non-N1 Applications
Indoor disconnect switch (fused or non-fused)
Stand Kits (for freestanding applications)
Alarm contacts
GFCI
FREEZE PROTECTION
Remote Display
N1–NEMA 1(Non-waterproof)
2
3
OPERATION PRINCIPLE
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, thepatented flow meter within the heater recognizes the demand and initiates the
heating process. This meter measures the water flow 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 flow rate. If this flow 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 flow rates. Since a tankless water heater eliminates the ongoing thermal losses
caused by storing hot water in a tank, there will be a significant energy savings compared to a conventional tank type
water heater.
Temperature Rise at Specified Flow Rate (°F)
Dieses Handbuch passt für folgende Modelle
1
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