Lotus LTS-3HP Installation And Operation Manual

Installation and Operation Guide

Model #: LTS-3HP

3.5kW / 120V

Note: Restricted to sink applications only. Please read manual

completely prior to installing your unit to understand if this

unit is suitable for your application.

Safety Instructions

OVERVIEW

This manual must be read carefully before attempting to install the water heater. If you do not follow the safety rules or the
instructions outlined in this manual, the unit may not operate properly and it could cause property damage, serious bodily injury
or death.

Atmor will not be liable for any damages because of failure to comply with the installation and operating instructions
outlined in this manual or because of improper use. Improper use includes the use of this appliance to heat any liquid other than

Failure to comply with the installation and operating instructions or improper use voids the warranty. Never

water.

remove the unit’s cover unless the electricity is turned off.

01

The water heater must
be installed by a licensed
electrician and in compliance with
all local electrical and building
regulations.

04

The heater must be installed
according to the installation
instructions (see figures).

07

The plumbing installation
requires metal or reinforced
pipes that can withstand a
minimum pressure of 8 bar.
(Other types of pipes will cause
damage.)

02

Caution: The appliance must be
grounded.

05

The plumbing installation
must be completed before the
electrical installation.

08

Do not install the heater where
it may be subjected to direct
sunlight, rain and/ or a constant
spray of water.

03

A dedicated circuit breaker
must be installed on the power
distribution panel.

06

The heater operates at a
minimum water flow rate of

0.5 gallon/minute.

09

Always contact your
local authorized licensed
proffessional for service.

1

Technical Information

Circuit breaker

Model Wattage Voltage Amperage Phase

LTS-3HP 3.5 kW 120 27 1 30 10 AWG

Minimum water flow to activate unit: 0.5 GPM
Nominal water volume: 0.11 gal (0.42l)
Working pressure: 0.5 -8 bar (7 -115 psi)
Tested pressure: 16 bar (230 psi)
Water connections: 1/2” NPT
Dimensions (in) (H x W x D): 7.2 x 11.8 x 4.3
Weight (Ib): 3.4

size

Model Guide - kW Output

Model 120V 110V

LTS-3HP 3.5 kW 3.0 kW

Wattage based on maximum voltage.

Required wire

size

2

Assembly Instructions

01

Connect the Pressure Relief Device
(PRD) to the unit (Fig1) Note:

IMPORTANT – do not discard
this step. A PRD must be
installed.

Mount unit to wall with 4 screws at the marked
points (Figure 4)

04

The appliance must be mounted horizontally, with
water inlets and outlets at the bottom (Figure 5)

Connect the water inlet hose to the entry point of the heater (left side inlet), and connect
the outlet hose to the water outlet. Use a hose that can withstand a minimum pressure of
4 bars. Using any other type of hose will cause damage (Figure 5).

05

Residential plumbing systems with unstable pressure or pressure above 5 bar require
the application of a pressure stabilizer valve, set to 4 – 5 bars.

Do not install the appliance with water inlets and outlets at the top (Figure 6)

02

Remove the appliance covers
(Figure 2).

03

1. Mount ground plate to wall.

2. Pull wires through.

3. Cut out hole in back of unit
(Right/Left back) and pass
wires through

(Figure 3)

06

3

N

L1G

1

Rubber

PRD

Cold Hot

2

*

3 4

3

3.5kW

G = Green or Yellow
N = White
L1 = Black

65

L1GGN

L1

N

4

07

Run the water flow for
one minute to check for
leakage before connecting
to power.

Reattach the front cover of the heater and
secure it with 4 screws and then slide the
bottom gray cover

08

11 12

When installed outdoors,
the heater must be placed in
sealed waterproof electrical
box.

Connect the power cable to the terminal
block.
Caution: The heater must be grounded.
Reference figure *3 on page 4 and
Electrical diagram on page 6

1009

Make sure that the
appliance is filled with water
before connecting power.
(Repeat step 7)

Do not install the heater where
it may be subject to direct
sunlight.

13

5

It is recommended that the appliance electrical
connections be tested once a year by a qualified
technician.

Electrical Diagram

3.5kW (120V)* - Install Line 1 (L1), E(G)-Ground, N (Neutral)

1

L1

E(G)

N

1. Terminal block

2. Thermal cut-out with reset

3. Thermal cut-out

4. Light

5. Switch On / Off

6. Relay

7. Heating element

8. Read sensor

* 3.5kW/120V = 3.0kW/110V

6

Operation Guide

Flow Rate Chart

35º F Temp Rise - 0.6 GPM
45º F Temp Rise - 0.5 GPM

Troubleshooting

PROBLEM ISSUE POSSIBLE CAUSE SOLUTION

Water not hot
enough.

Water too hot. Not enough water flowing
through the heater.

Too much water flowing
through the heater.

Reduction in the ambient
temperature.

Water Pressure below of

0.5 bar (7 psi).

Electrical Malfunction.

Increase in the ambient
temperature.

7

Reduce the flow rate of the water via
the outlet tap.

Switch to higher temperature setting.

Check if the main water line stop
valve is fully open and that there
are no other restrictions in the water
supply line.

Have the Heater unit check by a
qualified eIectrician or contact your
local authorized distributor.

Increase the flow rate via the outlet
tap.

Switch to lower temperature setting.