Elwa HOTRUN 35, HOTRUN 46, HOTRUN 60, HOTRUN 90, HOTRUN 72 Operating And Fitting Instructions Manual

HOTRUN 35-90

Domestic &
Commercial
Applications

Operating & Fitting Instructions

ELECTRIC INSTANTANEOUS WATER HEATERS

saving water and energy

Contents

2

General information ................................. 3

Technical data ..................................... 4

Safety instructions .................................. 4

Mounting instructions................................ 5

Water connection ................................... 5

Electric connection .................................. 7

Initiation .......................................... 8

Maintenance....................................... 8

Troubleshooting .................................... 8

Terms of guarantee ................................. 10

In this manual we explain to you how you can install your
Hotrun easy and safely. Keep this manual for future use.
The next user of the Hotrun water heater might need it.

Components

3

1a
2

3
4

5

6
7

1b

The ELWA Hotrun electric instantaneous water-heaters are designed for point of use (most
efficient and lowest water and energy consumption) and multipoint applications, such as a wash
basin or shower (or both), in fact all places where instant hot water is required. The heating of
the water is started instantly by opening a tap or valve connected to the hot water outlet.
The “Hotrun T” models meet AS/NZS 3500 and AS 3498 anti-scald requirements at the maximum
temperature performance stated on the label.

The outlet water temperature depends on the following factors:

- The flow rate through the HOTRUN, controlled by a fixed flow restrictor (supplied)
on or in the cold water inlet

- How far the hot water tap is actually opened or the incoming flow into the unit
restricted by a regulating valve or flow restriction in the spout of the tap or
shower head

- The temperature of incoming cold water

- The mixing of hot- and cold water

The hot water temperature rises by reducing the flow rate. By closing the hot-water tap or when
the flow drops below a minimum flow rate the heating will be stopped automatically.
The performance of the Hotrun depends on its kWatt rating.
A temperature rise of approximately 25° can be expected with the following flow rates:

kW loading: Flow rate: kW loading: Flow rate:

3.5 1.9 l/min 7.2 4.0 l/min

4.6 2.5 l/min 9.0 5.0 l/min

6.0 3.0 l/min

When the inlet temperature is 25 °C the performance can rise by 50%.

The service temperature will be reached normally within 10 seconds after the Hotrun has been
switched on. A pressure of 100kPa is the minimum required for correct operation.

1. Maximum temperature cut-out (a or b)

2. Second max.temperature cut-out (optional)

3. Differential pressure switch

4. Micro-switches of dP switch

5. Terminal block

6. Blue marking = cold water inlet

7. Red marking = hot water outlet

General information

Technical specifications

4

Safety instructions

Electrical connections have to be made by a qualified electrician.
Install the Hotrun as close as possible to the tap(s) in a frost-free space.
Make sure the power supply is shut off at all times installing or servicing a Hotrun.
Fit a service valve in the water supply to the Hotrun.
Do not operate the Hotrun in a “dry state”, the electrical power should not be switched on
before the Hotrun has been completely filled with water.
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or
similarly qualified persons in order to avoid a hazard.

Read these instructions for safety and installation carefully before starting to install!

Model 35 46 60 72 90

Rating (kW) 3.5 4.6 6.0 7.2 9.0

Current (A) 16 20 25 2x16/32 2x20/40

Minimum pressure for all models: 1 bar / 100 kPa
Maximum pressure for all models: 10 bar /1MPa

Guaranteed Flow Rates at 37°C outlet temperature

l/min when 1.9 2.5 3.6 4.0 5.1

inlet temp. = 12°C

l/min when 4.3 5.4 7.5 8.4 10.5

inlet temp. = 25°C

Electrical Approvals to European and Australian standards IEC & AS/NZS 60335:2:35
and Australian Plumbing Standard AS/NZS 3498 & 3500, WaterMark approval no. 40034

Selection/applications of Hotrun models (varies per State due to inlet temperature)

Hand basin ✔T ✔T

Hairdressers shampoo basins ✔T ✔T ✔T ✔T

Showers and basins ✔T ✔T

Commercial applications ✔ ✔ ✔ ✔