Smartgen HWP60A User manual

HWP60A/HWP90A
FORCED CIRCULATION HEATER
USER MANUAL

HWP60A/HWP90A Forced Circulation Heater User Manual Page 2 of 12
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]
Web: www.smartgen.com.cn/
www.smartgen.cn/
Email: s[email protected]n
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.
2022-05-10
1.1
Add HWP90A and operation voltage, change working diagram and
add maintenance description.

HWP60A/HWP90A Forced Circulation Heater User Manual Page 3 of 12
CONTENT
1. OVERVIEW ................................................................................................................................................4
2. PERFORMANCE AND CHARACTERISTICS.............................................................................................4
3. SPECIFICATION........................................................................................................................................5
4. INSTALLATION INSTRUCTION................................................................................................................ 6
5. OPERATING INSTRUCTIONS...................................................................................................................7
5.1 PANEL AND BUTTON........................................................................................................................7
5.2 DISPLAY DESCRIPTION....................................................................................................................7
5.3 PANEL DESCRIPTION .......................................................................................................................8
5.4 OPERATION DESCRIPTION ..............................................................................................................8
6. USE AND MAINTENANCE........................................................................................................................9
6.1 VENT VALVE......................................................................................................................................9
6.2 WATER DRAIN VALVE....................................................................................................................... 9
7. CONNECTIONS.......................................................................................................................................11
8. CASE AND DIMENSIONS .......................................................................................................................12

HWP60A/HWP90A Forced Circulation Heater User Manual Page 4 of 12
1. OVERVIEW
HWP60A/HWP90A forced circulation engine water heater is composed of 3 parts (control section,
water pump and water heater).
If the outside temperature is lower than 4ºC, 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 4ºC.
HWP60A 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 (25~75)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 -40ºC temperature.

HWP60A/HWP90A Forced Circulation Heater User Manual Page 5 of 12
3. SPECIFICATION
Table 2 Parameters Specification
Item
HWP60A
HWP90A
Rated Power
6000W
9000W
Rated Voltage
AC 420V
Operation Voltage
AC (378~440)V
Rated Current
8.3A
12.5A
Phase
Three Phase
Engine Displacement
(25~50)L
(50~75)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 Temperature
-40ºC~+70ºC
Storage Temperature
-40ºC~+80ºC
Case Dimensions
504mm×255mm×426mm
Weight
15kg

HWP60A/HWP90A Forced Circulation Heater User Manual Page 6 of 12
4. INSTALLATION INSTRUCTION
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 Working Diagram
Fig.2 Installation Diagram

HWP60A/HWP90A Forced Circulation Heater User Manual Page 7 of 12
Fig.3 Incorrect Pipe Connection Methods
NOTE: If there is a W-shaped bend or reverse U-shaped bend during pipe connection, the air
accumulated in the pipe cannot be discharged normally, resulting in the liquid cannot be circulated
properly. The air dissolved in the liquid will be precipitated during heating and retained in the bend, so
on the condition of unsmoothed pipeline, even if by the manual exhaust, it will repeat in the next heating
process of air collection. To ensure that the smooth liquid circulation, the hosepipe with an inner
diameter of more than 20mm and pipe joints with an inner diameter of more than 15mm should be
selected.
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

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5.3 PANEL DESCRIPTION
Fig.4 Operation Panel Drawing
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 40ºC 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 25ºC 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.

HWP60A/HWP90A Forced Circulation Heater User Manual Page 9 of 12
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.5 Vent Valve Indicating Diagram
6.2 WATER DRAIN VALVE
If water is used, please drain it off when ambient temperature is lower than 0ºC. Otherwise, the
remaining water will freeze, resulting in heater break. Using tap water or river water will scale the
surface of heating pipe and shorten the using life of the heater.
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.6 Water Drain Valve
Common Faults and Solutions:
1. Overheat protection:
a. Check the valve to assure whether it is opened and whether the heater is full of water;
b. Check whether the hosepipe has an obvious W-shaped or reverse U-shaped trend, and whether there
is an obvious hot and cold alternating area.
Solutions: Shorten the hosepipe length and optimize the hosepipe trend.
2. High water outlet temperature: under normal circumstances, the outlet temperature is about 70ºC. It
occurs when the hosepipe is too long, both the inner diameter of the hosepipe and the inner diameter of
the fitting joints are too small, as well as the water flow is not smooth so that the heat cannot be

HWP60A/HWP90A Forced Circulation Heater User Manual Page 10 of 12
transferred properly.
Solutions: Shorten the hosepipe length, using the hose with an inner diameter of more than 20mm, and
the connectors with an inner diameter of more than 15mm.
3. Unable to reach the preheating temperature:
a. The heater power is not enough;
b. The cable of the power supply is too long and result in dividing resistance of the cable.
Solutions:
1. Replace the heater whose power matches the engine;
2. Shorten the power cable as possible and increase the cable diameter.

HWP60A/HWP90A Forced Circulation Heater User Manual Page 11 of 12
7. CONNECTIONS
Fig.7 Schematic Diagram
Use 4mm2 power cable for tie-in. Earth line must be soundly connected to earth.

HWP60A/HWP90A Forced Circulation Heater User Manual Page 12 of 12
8. CASE AND DIMENSIONS
unit: mm
Fig.8 Overall Dimensions
NOTE: All the inlets/outlets connectors are Pagoda-shape.
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