SEW-Eurodrive R...7 Series Operating instructions

*29137454_0819*

Drive Technology \ Drive Automation \ System Integration \ Services

Addendum to the Operating

Instructions

Gear Unit Series R..7, F..7, K..7

Gear Unit Heating

Edition 08/2019 29137454/EN

SEW-EURODRIVE—Driving the world

Table of contents

Addendum to the Operating Instructions – Gear Unit Series R..7, F..7, K..7 3

Table of contents

1 Important information .............................................................................................................. 4

2 Structure.................................................................................................................................... 5

2.1 Operating principle..........................................................................................................5

2.2 External thermostat.........................................................................................................6

2.3 Integrated thermostat......................................................................................................6

3 Thermostat ................................................................................................................................ 7

3.1 External thermostat.........................................................................................................7

3.2 Integrated thermostat......................................................................................................7

4 Thermostat – electrical connection ........................................................................................ 9

5 Startup/operation.................................................................................................................... 10

5.1 Positioning the thermostat ............................................................................................10

6 Technical data......................................................................................................................... 12

6.1 A: C/Th/RE/3/G 1 1/2 screw-in heater ..........................................................................12

6.2 B: C/RE/3/G1 1/2 screw-in heater.................................................................................13

6.3 C: C/RE/4/G2 screw-in heater ......................................................................................14

6.4 Thermostat....................................................................................................................15

29137454/EN – 08/2019

1Important information

Addendum to the Operating Instructions – Gear Unit Series R..7, F..7, K..7

1 Important information

INFORMATION

This information complements the "SPIROPLAN® W Gear Units, R..7, F..7, K..7, K..9,

S..7 Series" operating instructions.

A requirement of fault-free operation and fulfillment of any rights to claim under guar-

antee is that you adhere to the information in the operating instructions.

WARNING

Danger of electric shock.

Severe or fatal injuries.

• De-energize the oil heater before you start working on the unit.

• Secure the oil heater against unintended power-up.

CAUTION

Improper installation of the oil heater may result in damage to the gear unit.

Possible damage to property.

• Make sure that all the heating elements are fully immersed in the oil bath in order

to avoid any damage.

CAUTION

The voltage at the heater and the thermostat must not exceed 230V.

29137454/EN – 08/2019

Structure

Operating principle

Addendum to the Operating Instructions – Gear Unit Series R..7, F..7, K..7 5

2 Structure

An oil heater is required to allow for a smooth start-up in the event of a cold start at

low ambient temperatures. The oil heater is available with an external or an integrated

thermostat depending on the gear unit design.

However, a gear unit heater is only possible for mounting positions where the thermo-

stat and the screw-in heater are sufficiently covered with oil. This is why the position of

the heater and the thermostat varies depending on the type and the mounting position

of the gear unit. The following table shows for which mounting positions you can use a

gear unit heater:

Gear unit

type

Mounting position

M1 M2 M3 M4 M5 M6

R.. – – X X – –

F.. X X – – X X

K.. X – X1) X X2) X2)

1) possible as of size K..97

2) possible as of size K..167

Depending on the type and size of the gear unit, the gear unit heater can be equipped

with an external or an integrated thermostat:

Gear unit

type

Gear unit size

77 87 97 107 127 137 147 157 167 187

R.. I I I I – E E – E –

F.. I I E E E – – E – –

K.. I I E E E – – E E E

I Heater with integrated thermostat

E Heater with external thermostat

– Size not available

2.1 Operating principle

The heater is screwed into the gear unit housing and is controlled via a thermostat.

The trip temperature of the heater is set depending on the respective lubricant.

The thermostat built in via a special cover has an adjustable temperature range in

which the oil is heated. The temperature range is preset by SEW‑EURODRIVE and

can be changed manually by the customer.

In order to prevent the oil from burning, the heating elements of the heater have a ma-

ximum surface load. This is why the heating process for cold gear unit oil can take

between one and several hours. The duration of the heating process before the start

depends on the following factors:

• Gear unit size

• Mounting position

• Oil quantity

• Ambient temperature

29137454/EN – 08/2019

2Structure

External thermostat

Addendum to the Operating Instructions – Gear Unit Series R..7, F..7, K..7

The thermostat has to be energized continuously, even if the drive is at a brief stand-

still. If the drive is at standstill over a longer period, for example during holidays, and

the thermostat is not energized, you have to make sure that the thermostat is ener-

gized in due time before the drive is started up.

2.2 External thermostat

The following figure shows a gear unit with heater and external thermostat:

[1]

[2]

2060553483

[1] Thermostat

[2] Heater

2.3 Integrated thermostat

The following figure shows the gear unit with integrated thermostat:

[1]

[2]

2060555403

[1] Thermostat

[2] Heater

29137454/EN – 08/2019

Thermostat

External thermostat

Addendum to the Operating Instructions – Gear Unit Series R..7, F..7, K..7 7

3 Thermostat

3.1 External thermostat

Depending on the lubricant, the ATHs-SW-2-JUM thermostat with part number

13253972 is preset by SEW-EURODRIVE to one of the two temperature values:

Lubricant Temperature value

CLP HC 220 0 °C

CLP HC 150 -5°C

CLP HC 68 -10°C

CLP HC 32 -15°C

The following figure shows the possible setting range of the thermostat. In this ex-

ample, the pointer is on 0°C.

100

-20

2060551563

3.2 Integrated thermostat

The C/Th/RE/3/G1½ heater is equipped with an integrated thermostat:

[1]

2060541963

[1] Heater

The temperature value is preset by the supplier. Irrespective of the lubricant, the value

is 10°C.

29137454/EN – 08/2019

3Thermostat

Integrated thermostat

Addendum to the Operating Instructions – Gear Unit Series R..7, F..7, K..7

The following table shows the integrated screw-in heaters:

Gear unit type Screw-in heater

Heater Thread Con-

nection

voltage

Connec-

tion

type

Power

Cable

gland

Wiring

diagram

R77 F77 K77 C/Th/RE/3/G 1 1/2 G1 1/2

AC230

115V/

120V

Series

connec-

tion

180

Pg 16

(→212)

R87 F87 K87

R97 – – C/Th/RE/3/G 1 1/2 G1 1/2 270

R107

R137 F97 K97 C/RE/3/G1 1/2 G1 1/2 320

(→213)

- F107 K107 C/RE/3/G1 1/2 G1 1/2 400

R147 F127 K127 C/RE/3/G1 1/2 G1 1/2 520

R167 F157 K157 C/RE/3/G1 1/2 G1 1/2 700

– –

K167 C/RE/4/G2 G2 Parallel

connec-

tion

1000 C

(→214)

K187 C/RE/4/G2 G2 1300

29137454/EN – 08/2019

Thermostat – electrical connection

Addendum to the Operating Instructions – Gear Unit Series R..7, F..7, K..7 9

4 Thermostat – electrical connection

Proceed as follows to connect the thermostat:

1. Connect the thermostat to the terminals [1], [2] and [4] according to the following

wiring diagram:

2 4

18014398960475019

2. Connect the protective earth conductor to the "PE" terminal.

INFORMATION

Observe the manufacturer's safety instructions.

29137454/EN – 08/2019

5Startup/operation

Positioning the thermostat

Addendum to the Operating Instructions – Gear Unit Series R..7, F..7, K..7

5 Startup/operation

The gear unit heater comes equipped with cable glands and jumpers. These are in-

cluded in the delivery of the screw-in heaters and are already preassembled. The gear

unit heater is connected to the current supply via terminal studs. They do not depend

on the size of the heater and always have an M4 thread. We recommend using RKS4

ring cable lugs with small grommets.

CAUTION

Malfunction of the gear unit heater due to change of the mounting position.

Possible damage to property.

• Do not change the mounting position without prior consultation with

SEW‑EURODRIVE, otherwise proper functioning of the gear unit heater is no

longer ensured.

Notes on the function of the oil heater

• The thermostat is preset to the temperature specified in chapter "Thermo-

stat"(→27). The thermostat turns off the oil heater at this temperature. The ther-

mostat activates the oil heater again once the temperature is about 3K below the

limit temperature. The gear unit may only be taken into operation when the tem-

peratures set in the thermostat have been reached or when the gear unit oil has

been heated by the oil heater for at least 3hours. Contact SEW-EURODRIVE for

detailed project planning.

• Thermostat and oil heater are installed in the gear unit and are ready for operation.

Before taking the thermostat and oil heater into operation, wire and connect them

to the power supply.

• Contact SEW‑EURODRIVE if a differing oil viscosity class is used or if ambient

temperatures fall below the specified limit temperature.

5.1 Positioning the thermostat

Depending on the installation situation of the drive, it might be necessary to change

the position of the thermostat.

Proceed as follows to position the thermostat:

1. Open the clamping screws [2].

2. Turn the thermostat to the required position.

Observe the position of the cable gland. Mount the cable gland in such a way that

no moisture can enter.

29137454/EN – 08/2019

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