Smartgen HWP40-3 User manual

HWP40-3
FORCED CIRCULATION HEATER
USER MANUAL
SMARTGEN (ZHENGZHOU) TECHNOLOGY CO., LTD.

Chinese trademark
English trademark
SmartGen —make your generator smart
SmartGen Technology Co., Ltd.
No.28 Jinsuo Road, Zhengzhou, Henan Province, China
Tel: [phone]
[phone](overseas)
Fax: [phone]
Email: [e-mail]
Web: www.smartgen.com.cn
www.smartgen.cn
All rights reserved. No part of this publication may be reproduced in any material form (including
photocopying or storing in any medium by electronic means or other) without the written permission
of the copyright holder.
Applications for the copyright holder’s written permission to reproduce any part of this publication
should be addressed to SmartGen Technology at the address above.
Any reference to trademarked product names used within this publication is owned by their
respective companies.
SmartGen Technology reserves the right to change the contents of this document without prior
notice.
Table 1 - Software Version
Date
Version
Content
2020-12-31
1.0
Original release.
2021-01-27
1.1
Modified the engine displacement to (15~30)L in overview.

HWP40-3 ForcedCirculationHeaterUser Manual Page 3 of 11
CONTENT
1. OVERVIEW .........................................................................................................................4
2. PERFORMANCE AND CHARACTERISTICS............................................................................4
3. SPECIFICATION..................................................................................................................5
4. HEATER INSTALLATION .....................................................................................................6
5. OPERATING INSTRUCTIONS ...............................................................................................7
5.1. PANEL AND BUTTON..........................................................................................................7
5.2. DISPLAY DESCRIPTION ......................................................................................................7
5.3. PANEL DESCRIPTION .........................................................................................................7
5.4. OPERATION DESCRIPTION .................................................................................................8
6. USE AND MAINTENANCE....................................................................................................9
6.1. VENT VALVE ......................................................................................................................9
6.2. WATER DRAIN VALVE.........................................................................................................9
7. CONNECTIONS.................................................................................................................10
8. CASE AND DIMENSIONS...................................................................................................11

HWP40-3 ForcedCirculationHeaterUser Manual Page 4 of 11
1. OVERVIEW
HWP40-3 forced circulation engine water heater is composed of 3 parts (control section, water
pump and water heater).
If the outside temperature is lower than 4 ºC, engine coolant and lubricant may condense into solid
state and lose their lubricating and cooling properties during cranking, which can damage the engine.
Thus engine heater should be installed to ensure normal starting and running of the engine when the
outside temperature is lower than 4 ºC.
HWP40-3 forced circulation engine water heater combines the following features: cast stainless
steel inner pipes and end closure with high corrosion resistance; heating and overheat light indicators;
user-defined thermostat set point; dry heating and overheat protection.
This product is suitable for various engine with (15~30) L displacement.
Please login our company's official website (www.smartgen.com.cn) to select heaters.
2. PERFORMANCE AND CHARACTERISTICS
——The circulating water pump adopts special customized pump with stainless steel pump head;
——Microprocessor design of control section and PT100 temperature sampling. Coolant temperature
can be set via the control panel. Four digital LED display, current coolant temperature and all kinds of
set point temperature can be displayed clearly;
——Dry heating and overheat protection due to the inner overheating temperature detect switch;
——Separately control of water pump and water heater: power on the water pump and water heater
synchronously, once the set temperature has reached, water heater will be powered off firstly, after 60s,
following is water pump. The goal is to prevent heat concentration and significantly prolong water
pump lifetime;
——Manually test the water heater and water pump are normal or not via panel button;
——Fine cast aluminum enclosure;
——Stainless steel inner pipes and sealed end closure;
——There is a water drain valve with seal ring on the bottom of the heater so as to be used when
needed;
——There is one-way inlet valve on the water inlet;
——This product can work normally at -40 ºC temperature.

HWP40-3 ForcedCirculationHeaterUser Manual Page 5 of 11
3. SPECIFICATION
Table 2 –Parameters Specification
Item
HWP40-3
Rated Power
4000W
Rated Voltage
AC 420V
Rated Current
5.5A
Phase
3P3W
Engine Displacement
(15~30 )L
Thermostat Range
Off: (5~99)ºC On: (0~94)ºC
Default Thermostat Range
Off: (40±2)ºC On: (25±2)ºC
Overheating Thermostat
Range
Off: (95±3)ºC On: (80±6)ºC
Insulating Resistance
≥50MΩ
Electrical Strength
AC 1.5kV 1min
Inlet/Outlet Size
3/4”(Ф19.5mm)
Max. Water Pressure
0.5MPa
Pump Flow Velocity
40L/min (1.5m of lift)
Protection Level
IP44
Vibration Resistance
(5~8)Hz Amplitude±7.5mm Triaxial
(8~500)Hz a=2g Triaxial
Shock Resistance
Half-sine Wave; apeak=50g; Triaxial
Working Conditions
-40 ºC~+70 ºC
Storage Conditions
-40 ºC~+80 ºC
Case Dimensions
444 mm×284 mm×400 mm
Weight
18kg

HWP40-3 ForcedCirculationHeaterUser Manual Page 6 of 11
4. HEATER INSTALLATION
Please install the heater vertically according to the diagram before use. Pay attention to the
direction of heater inlet and outlet, and ensure that the heater position is below the lowest water lever
of the engine and that all the air is exhausted out of the heater and it is topped off with coolant.
Fig.1 - Installation Plane Schematic
Fig.2 –Installation Side Schematic

HWP40-3 ForcedCirculationHeaterUser Manual Page 7 of 11
5. OPERATING INSTRUCTIONS
5.1. PANEL AND BUTTON
Table 3 –Panel Display and Buttons
Button
Definition
Description
Test
Pressing this button to test-run the machine.
Lamp Test
All indicators will be illuminated when the button is pressed.
Set
Pressing this button to set the temperature value.
Turn Page
Pressing this button to scroll pages of the LED Nixie Tube and adjust
the value.
5.2. DISPLAY DESCRIPTION
The heater is heating on when the “Heating” indicator is illuminated while the Thermostat is open
and the heater stops heating when the “Overheat” indicator is flashing.
Temp. Display: OFF Temp. Display: ON
Temp. Display: Current Temp. Alarm: Sensor Abnormal
5.3. PANEL DESCRIPTION
Fig.3 –Operation Panel Drawing

HWP40-3 ForcedCirculationHeaterUser Manual Page 8 of 11
5.4. OPERATION DESCRIPTION
★Turn Page( )
Using this button you can scroll pages of the LED Nixie Tube and adjust the value.
★Test( )
If the water temperature has exceeded the preset “ON” temperature, pressing this button will
test-run the heater, after 3s, it turns into Auto mode automatically.
★Lamp Test( )
All indicators will be illuminated when the button is pressed.
★Set( )
Pressing this button will enter into setting interface, as shown: (Letter “H” means
that it is the preset “OFF” temperature, here we take 40℃as example)，the first digital is flashing and
you can adjust it by pressing button. Then press button, the second digital will flash and the
adjust way is same as the first digital. Press , as shown: (Letter “L” means that it
is the preset “ON” temperature, here we take 25℃as example)，the first digital is flashing and you
can adjust it by pressing button. Then press button, the second digital will flash and the
adjusting way is same as the first digital. After doing these, press button, the LED will back the
current temperature. All the adjustment should be saved and not lost even when power is off.

HWP40-3 ForcedCirculationHeaterUser Manual Page 9 of 11
6. USE AND MAINTENANCE
6.1. VENT VALVE
Before starting the machine, ensure that all the air is exhausted out of the heater and it is topped
off with coolant, and make sure that the pump is full of water by using vent valve.
Fig.4 –Vent Valve Indicating Diagram
6.2. WATER DRAIN VALVE
If water is used, please drain it off when generator is stopped to avoid internal corrosion. Otherwise,
the remaining water freezes when temperature is lower than 0°C, which can damage the enclosure.
Corresponding antifreeze is strongly recommended.
Earth line must be soundly connected to earth.
Drain valve: Can be opened or closed using hexagonal tools.
Unit: mm
Fig.5 –Water Drain Valve

HWP40-3 ForcedCirculationHeaterUser Manual Page 10 of 11
7. CONNECTIONS
Fig.6 - HWP40-3 Diagram
Use 4mm2 power cable for tie-in. Earth line must be soundly connected to earth.

HWP40-3 ForcedCirculationHeaterUser Manual Page 11 of 11
8. CASE AND DIMENSIONS
unit: mm
Fig.7 –Overall Dimensions
Note: all the inlets/outlets connectors are Pagoda-shape.
_________________________________