Smartgen HT40N User manual

HT40N
ENGINE WATER 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
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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
Note
2020-05-14
1.0
Original release.
2021-04-26
1.1
1.Changed the water drain valve;
2.Changed the water drain valve drawing;
3.Changed the font, the format of header and footer;
4.Optimized the translation.
2021-09-16
1.2
Changed the case dimensions in Technical Parameters; optimize the
figures of Water Proof Connector, Working Diagram, Installation
Positions and Case Dimensions.

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CONTENTS
1 OVERVIEW.......................................................................................................................................................4
2 PERFORMANCE AND CHARACTERISTICS....................................................................................................4
3 TECHNICAL PARAMETERS............................................................................................................................5
4 PANEL INDICATOR .........................................................................................................................................6
5 CONNECTIONS ...............................................................................................................................................7
FIG. 3 WATER PROOF CONNECTOR...................................................................................................................7
6 HEATER INSTALLATION ................................................................................................................................8
7 OPERATION.....................................................................................................................................................9
8 CAUTION ...................................................................................................................................................... 10
9 CASE AND INSTALLATION DIMENSIONS.................................................................................................. 11
10 PACKING LIST.............................................................................................................................................. 12

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1OVERVIEW
HT40N Engine Water Heater applies fine cast aluminium enclosure, and flame retardant engineering
plastic end cap, which is suitable for engine coolant liquid pre-heating of all types. It is easy and simple
to use.
When engine ambient environment is below 4ºC, engine coolant and lubrication oil may condense to
solid state at cranking phase, losing lubrication and cooling functions. This may hurt the engine.
Therefore, when engine ambient environment is below 4ºC, it shall be added a heater to ensure engine
normal cranking and running.
Inside heating tube of heater adopts stainless steel, with strong corrosion resistance. Heater has lamp
indicator function, which can clearly indicate Power On and Heating status. There are 3 heating
temperatures to select (standard temperature 40ºC; and 50ºC and 60ºC heaters are custom made).
This product suits all kinds of engines with displacement (13-25) L.
For selecting heater models please login our official website.
2PERFORMANCE AND CHARACTERISTICS
—Fine cast aluminum is used for heater enclosure and stainless steel material is used for
internal heating tube;
—Coolant liquid temperature is controlled by thermostat switch inside the heater; simple
structure and reliable performance;
—Power, Heating, Over heating protection indicators are installed on the panel, which is
convenient to observe heater's working status;
—There is a water drain valve with sealing gasket at the bottom of the heater, it can be used in
need;
—Over heating thermostat switch is installed inside, providing dry-heating prevention and over
heating protection functions;
—When environment is too high, commissioning operation can be done via Test button;
—This product can work normally in the environment of -40ºC temperature.

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3TECHNICAL PARAMETERS
Table 2 HT40N Heater Detailed Parameters
Item
Contents
Model
HT40N
Rated Power
4000W
Rated Voltage
AC 240V
Rated Current
16.7A
Working Voltage
AC 190V~AC277V
Applicable Engine Displacement (L)
(13~25)L
Thermostat Switch Range
HT40N: Off: (40±3) ºC On: (25±5) ºC
HT40N-T50: Off: (50±3) ºC On: (35±5) ºC
HT40N-T60: Off: (60±3) ºC On: (45±5) ºC
Overheating Thermostat Range
Off: (95±3) ºC On: (80±5) ºC
Insulating Resistance
≥50MΩ
Electrical Strength
AC 1.5kV 1min, ≤2.5mA
Inlet/Outlet Size
3/4″(φ19mm)
Max. Water Pressure
0.5MPa
Protection Level
IP54
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
389mm×193mm×116mm
Weight (Include accessories)
4.3kg

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4PANEL INDICATOR
Fig. 1 Back Panel Indicators
Fig. 2 Front Panel Indicator

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5CONNECTIONS
Fig. 3 Water Proof Connector
First of all, unscrew the water proof connector, then put 4 mm2 power line in the connector and lock and
tighten the cap. Connect power line according to above picture and connect in L, N, G binding posts.
Screw the connector and tighten the cap.

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6HEATER INSTALLATION
Please install the heater in vertical direction as the picture shows before using it. Pay attention to the
water inlet/outlet directions of heater and meanwhile ensure heater is installed below the lowest point
of engine's water jacket and all air is exhausted, and coolant is fully filled.
Fig. 4 Working Diagram
Fig. 5 Installation Positions

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Fig. 6 Installation Method
7OPERATION
7.1 TEST HEATER
When heater is not heating, and Overheat indicator is not illuminated, press Test key and it can
conduct test heater operation.
7.2 OVERHEAT PROTECTION RESET
When overheat alarm indicator is illuminated, heater goes to overheat protection status. It won't heat
and when heater temperature drops below thermostat reset temperature (25℃), it again enters
heating status.

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8CAUTION
Before starting the machine, please ensure that all the air is exhausted out of the heater and it is fully
filled with coolant. If water is not used and environment temperature is below 0℃, please drain water
off when ordinary water is used. This is to prevent the water in the heater from getting frozen and
resulting in heater fracture.
It is recommended to use coolant of corresponding tab of environment temperature.
Please use power line of high temperature resistance.
Earth line must be soundly connected to earth.
Drain valve: Can be opened or closed using hexagonal wrench, adjustable wrench, or a cross
screwdriver.
(Unit: mm)
Fig. 7 Drain Valve Size

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9CASE AND INSTALLATION DIMENSIONS
(Unit: mm)
Fig. 8 Case Dimensions
Fig. 9 Mounting Bracket Size

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10 PACKING LIST
Table 3 Packing List
No.
Item
Model
Number for one unit
1
Mounting Bracket
ZJ-HT40N
2
2
Flat Gasket
GB/T 95 8
8
3
Spring Washer
GB/T 93 8
8
4
Hexagon Nut
GB/T 41 M8
8
5
Hexagon Head Bolt
GB/T 5781 M8×40
8
6
User Manual
1
Table 4 Hose and Hydraulic Tube Fittings
No.
Item
Model
Number for one unit
1
Pagoda Joint
BTJT-G3/4-Φ19.5
2
2
ED Gasket
ED-23.9x29.2x1.5
2
Table 5 Threaded Fittings
No.
Item
Model
Number for one unit
1
Reducer
1B-08-12/2WD
2
2
ED Gasket
ED-23.9x29.2x1.5
2
3
ED Gasket
WD-B08
2
Fittings Selection Illustration:
Pagoda Joint is suitable for crimping connection of rubber hose and hydraulic tube. Each heater
needs 2 Pagoda joints and 2 ED gaskets (ED-23.9x29.2x1.5).
Reducer is suitable for tube fittings with G1/2 ports. Each heater needs 2 reducers, 2 ED gaskets
(ED-23.9x29.2x1.5), and 2 ED gaskets (WD-B08).
(Unit: mm)
Fig. 10 Pagoda Joint Size

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Fig. 11 Reducer Size
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