Rheem RTEC-04 E03 User manual

Electric Instantaneous Water Heater
Operation and Installation Instructions
Keep this instruction manual in a safe place once your unit is installed, you may need to refer to it for
general instructions or future maintenance.
Please read and follow the installation and operation instructions carefully, to ensure the long life
and reliable operation of this appliance.

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CONTENTS
Important Safety Instructions -------------------------------------------------------------------------------- page 2
Product Features--------------------------------------------------------------------------------------------------Page 3
Electrical Diagram------------------------------------------------------------------------------------------------ page 4
Technical Data ---------------------------------------------------------------------------------------------------- page 5
Product Inner Structure -----------------------------------------------------------------------------------------page 5
Installation Guideline -------------------------------------------------------------------------------------------page 6
Installation Method-----------------------------------------------------------------------------------------------page 6
Operation Instructions ------------------------------------------------------------------------------------------page 10
Trouble-Shooting---------------------------------------------------------------------------------------------------page 12
Normal Maintenance----------------------------------------------------------------------------------------------page 12
Correct Disposal of this product------------------------------------------------------------------------------page 13
Packing List--------------------------------------------------------------------------------------------------------- page 13

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■Important Safety Instructions
1. The installation must be in compliance with the National Electrical Code, your local electrical and plumbing
codes.
2. This appliance must be EARTHED. (If the model is equipped with plug, it is an electric leakage protection plug).
3. Install or locate this water heater only in accordance with the provided installation instructions.
4. Use this water heater only for its intended use as described in this manual.
5. Contact a qualified electrician to have unit properly installed.
6. This appliance is not intended for use by persons (including children) with reduced physical, sensory, or mental
capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction use of the
appliance by a person responsible for their safety.
7. This appliance MUST be permanently connected to the fixed circuit breaker and it must be installed vertically. DO NOT
install this appliance near to tinder or strong magnetic field place. Children should be supervised to ensure that they do
not play with the appliance.
8. This appliance is forbidden to be switch on if you think it may be frozen, as this could result in serious damage to the
unit. Wait until you are sure that it has completely thawed out before you switch it on.
9. Please feel the outlet hot water temperature with hand to make sure it is suitable for showering before taking shower to
avoid getting scalded.
10. Before connecting pipes to the water heater hoses, it is extremely important to FLUSH the pipes to wash away all
plumbing paste or residue in the pipes.
11. If there is damage to the wire, you must contact qualified electrician.
12. Run water through the outlet periodically, in order to remove calcium carbonate deposits.
13. The drain-pipe which connected to the water relief valve should be installed continuous downward in frostless
environment.
14. The spray head must be descaled regularly.

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WARNING: Do not switch on if there is a possibility that the water in the heater is
frozen.
■Product Features
This Mini tankless electric water heater differs from a conventional storage type mini water heaters. It
doesn’t store hot water. Instead, water is heated instantaneously as it flows through the unit. The powerful
heating elements are activated by a flow switch as water is drawn from a hot water faucet connected to the
appliance. Due to the absence of stand-by loss, the mini has greater energy efficiency than storage type
water heaters. The unit are incorporated with multi-safety devices and will continuously supply hot water as
long as the faucet is open.
Besides, the unit has the following features.
1. Tankless, instantaneous heating for on demand hot water, No pre-heating. No stand-by heating loss.
energy-saving.
2. High strength ABS splash proof casing, stainless steel heating element.
3. Compact appearance and unlimited supply of hot water.
4. Easy installation, heater can be installed above or under sink.
5. Easy operation, the heater provides hot water with constant temperature.
6. Micro-computer control, Adopting patent heating technology. Water is completely separated from
electricity by multi-layers of composite nano insulation material.
7. Over temperature protection: when the outlet water temp. reaches or exceeds 60°C, the appliance
will avoid scalding and will start to work automatically once temp. drops to a safe level.

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■Electrical Diagram

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■Technical Data
■Product Inner Structure
Model RTEC-04 E03 RTEC-06 E03
Voltage 220V-240V~
Wattage W 3500 6500
Rated Current A 16 29.5
Min. required circuit breaker A 16 40
Min. wire size mm2 1.5 4
Min. water flow to activate unit L/min 1.5
Frequency Hz 50 – 60
Working pressure MPa 0.02-0.6
Weight kg 1.5
Product Dimensions mm 198x160x98
Water connections G1/2”

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■Installation Guideline
The installation must be in compliance with the National Electrical Code, your local electrical and
plumbing codes.
1. Make sure the appliance is intact, and the fittings are complete.
2. Check valve is required to be installed at the water inlet.
3. Please make sure the main power supply, water pressure, grounding condition, amperage/current and
wire reach the standard of installation requirement.
4. The appliance must be connected to properly grounded dedicated branch circuits of proper voltage
rating. Ground must be brought to the “ground” at the circuit breaker panel.
5. This appliance MUST be permanently connected to the fixed circuit breaker. If you don’t use the heater,
please switch off the circuit breaker.
6. DO NOT install this appliance near to tinder or strong magnetic field place. The appliance can be
installed above or under the sink, and unit must only be mounted in a VERTICAL position near by the
water fittings.
■Installation Method
The Mini tankless electric water heater can be used for hand washing, kitchen and it can be installed above
or under the sink.
●Mounting the unit

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Locate an appropriate place on a section of wall as above mentioned.
Fig 1 Front and back of the appliance
Fig 2 Drill two holes of 6.00mm diameter: if you install the heater upright above the sink, the
distance between every two holes is 146mm; if you install the heater upside down under the sink, the
distance between every two holes is 139mm. Put plastic anchor in the holes
Fig2-A: Upward Installation Fig2-B: Upside down Installation

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Fig3 For Upright Installation, nail in the floor in upper hole (Fig3-A), For Downward
Installation, nail in the floor in lower hole (Fig3-B), fix the appliance on the wall with the below nail.
Fig3-A:Upward Installation Fig3-B: Upside down Installation
Fig4 Fix the appliance on the wall with the fixed nail;
Fig4-A:Upward Installation Fig4-B: Upside down Installation

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Fig5 Then fix the appliance with nail in another hole, to make sure the whole appliance is
installed on firm.
Fig 5-A: Upward Installation FIG 5-B: Upside down Installation
●Water Connections
1--- All water pipe must comply with national and applicable state and local water pipe codes.
2--- No matter install the appliance upright or handstand, Please connect the inlet connection (blue arrow
points to) to the cold water inlet pipe; connect the outlet connection (red arrow points to) to the hot water
outlet pipe .
3---The unit should be connected directly to the main water supply. Flush pipe with water to remove any
debris or loose particles. Following pics is for your reference.
4, It is required that use G1/2” water connections to fit the appliance. Please connect the inlet and outlet
pipe in perspective. Following pictures are for your reference.
5, Please remember to install rubber seal rings at the connections. When all water connections are
completed, check for leaks and take corrective action before proceeding.