nVent RAYCHEM RAYSTAT-EX-02 Mechanical Thermostat Installation Guide
- October 29, 2023
- nVent RAYCHEM
Table of Contents
RAYCHEM
RAYSTAT-EX-02
Installation instructions
RAYSTAT-EX-02 Mechanical Thermostat
- Cover over adjustment knob & ddial
- Lid locking system
- 3/4 inch NPT entry
- Capillary
- Bulb/ Senso
RAYSTAT-EX-02
| LCIE 08 ATEX 6095X
II 2 G D
Ex db IIC T6 Gb
Ex tb IIIC T80°C Db IP66
IECEx LCI 08.0036X
Ex db IIC T6 Gb
Ex tb IIIC T80°C Db IP66
–40˚C ≤ Ta ≤ +60˚C
---|---
| ЕАЭС RU C-BE.АД07.В.04187/22 ООО
1Ex d IIC T6 Gb X
Ex tb IIIC T80°C Db X
Ta –40°C…+60°C IP65
| N°: IEx 09.0009X
Ex db IIC T6 Gb
Ex tb IIIC T80°C Db IP66
–40°C ≤ Tamb ≤ +60°C
WARNING: DO NOT OPEN WHILE ENERGIZED
Only use copper conductors suitable for 90°C
Special conditions for Safe Use:
According to IEC/EN 60079-1 regarding thread maintenance applies: the
flamepaths are specified with maximum gaps smaller than those shown in the
standard and shall not be enlarged. The manufacturer should be consulted for
values if required for mainenance.
This thermostat is suitable for installation where the following are
applicable:
Circuit rating < 22 A switching current 480 V
Ta = Ambient Temperature
To complete the heating cable system other components must be selected from
the nVent literature.
Follow instructions carefully.
Declaration of conformity
0598
Our products satisfy the requirements of the relevant European Directives.
For cable connection in hazardous area verify that the proper type gland is
used!! (IEC /EN 60079-14 §10.4.2 d or e).
Zone 1 or Zone 2, Gas group IIC: use flameproof cable entry devices
incorporating compound filled seals around the individual cores or
another suitably certified sealing arrangement.
In all other cases use for armored cable GL-33 and for non-armored power
cables GL-34.
Enclosure installation
Alternative mounting arrangements are shown (4 mounting holes M6 clearance on
101.5 x 101.5 mm centres).
For optimised temperature control locate enclosure remote from bulb.
Locate enclosure to avoid exposure to mechanical damage.
Ensure enclosure entries are not directly exposed to water.
Maintenance
Maintain thermostat during normal plant maintenance.
CHECK:
Mounting is firm.
Exposed capillary is not damaged.
Gland seal (grommet) is in place.
Gland body and nuts are
tightened firmly.
Internal and external terminals are tight.
Thermostat operation correct.
Thermostat set to suit application.
Dial cover closed firmly.
Lid closed firmly.
Lid grub screw is tight.
Bulb and capillary installation
Location of bulb
- as indicated in the system design documentation
- away from heat sinks such as valves, flanges, supports or pumps
- at the top of the pipe for thermally sensitive pipe contents (A)
- on lower quadrant of pipe 90° from single heating cable (B)
- on lower quadrant of pipe centrally between heating cables if two or more heating cables (C).
Bulb and capillary installation continued
Attachment of bulb
fix bulb firmly on pipe surface with heating cable fixing tape in three places
(D) fix bulb parallel to pipe (D) route capillary to avoid damage in use.
Fix to pipe with tape where appropriate.
WARNING: Do not bend bulb, keep it straight at all times.
Cable connections
- Supply cable gland
- NOTE: Live link must be removed by installer
- Supply cable gland
- nVent RAYCHEM cable gland
- RAYSTAT-EX-02
- Junction box
- Connection kit
WARNING: Cable glands supplied by others must meet the requirements for
the hazardous area and cable construction applicable. Failure to remove any
links between live terminals (terminal L above) in the junction box will
result in loss of control.
Cable connections continued
- Ensure lid retaining grub screw is loose but is retained in plate
- Remove lid using spanner if necessary
- Install cable through gland, fix gland in place firmly and terminate cable to required standards
- Connect cable as shown
- Ensure lid retaining grub screw remains clear of lid
- Close lid by hand
- Tighten lid retaining grub screw
- Where required connect external earth terminal provided
WARNING: Ensure lid retaining grub screw is tightened fully to meet
hazardous area approval requirements.
CHECK: Gland seal (grommet) is in place. Gland body and nuts are
tightened firmly.
Complete installation
Ensure the pipe and bulb are thermally insulated and clad to the design
specification after installation of thermostat.
Seal cladding with sealant at entry of capillary (A).
When thermostat installation is complete test as described in the Installation
& Maintenance manual.
Retain this instruction for future use e.g. setting, testing,
maintenance.
Setting
Loosen fixing bolts and remove cover from dial.
Adjust knob to required setting.
Replace cover firmly by tightening fixing bolts.
Thermostat
Area of use| Hazardous area: Zone 1, Zone 2 (Gas), Zone 21, Zone 22 (Dust)
Ordinary
---|---
Approval certification| LCIE 08 ATEX 6095X
II 2 G D
Ex db IIC T6 Gb
Ex tb IIIC T80°C Db IP66
IECEx LCI 08.0036X
Ex d IIC T6 Gb
Ex tb IIIC T80°C Db IP66
–40°C ≤ Tanb ≤ 60°C
Enclosure
Body and lid| Lacquer coated cast aluminium with stainless steel fittings and
nitrile rubber internal lid seal
---|---
Protection| IP 65 if installed with nVent RAYCHEM cable glands GL-33 or GL-34
Lid fixing| Screw thread lid locked in place by a 2 mm hexagonal key grub
screw
Entry| 1 x 3/4″ NPT
Ambient operating| – 40°C to +60°C temperature
Temperature sensing
| Type | Fluid filled bulb and capillary |
|---|---|
| Dimensions | Capillary 3 m long, bulb 197 mm x 8 mm |
| Material | Stainless steel (Type 55316) |
| Exposure temperature | –50°C to +215°C |
| Minimum bend radius | DO NOT BEND BULB, 15 mm for capillary |
Switching
Type| Single pole change over volt free contacts (SPDT)
Rating| 22 A at 480 VAC, switching (100.000 cycles),
Setting
Range| –4°C to +163°C
Repeatability| ±1.7 K
Differential| 5 K
Accuracy (switch on)| ±4.5°C at 21°C ambient and 50°C sensor temperature
Method| External knob and dial
Connection terminals
Supply| 3 terminals for 1 to 4 mm2conductors
Internal earth| Single bolt for 1 to 4 mm2conductors
External earth| Single bolt and clamp for 1 to 4 mm2conductors
Mounting method
nVent RAYCHEM support bracket SB-100, SB-101, SB-110, SB-111 or surface
mounting with 4 fixing holes (M6) on 101.5 x 101.5 mm centres
Accessories
| Power cable gland for armoured cable | GL-33 | 493217-000 |
|---|---|---|
| Power cable gland for non-armoured cable (to be ordered separately) | GL-34 |
931945-000
Ordering details
| Part description | RAYSTAT-EX-02 |
|---|---|
| PN (Weight) | 404385-000 (1770 g) |
©2022 nVent. All nVent marks and logos are owned or licensed by nVent Services
GmbH or its affiliates.
All other trademarks are the property of their respective owners. nVent
reserves the right to change specifications without notice.
RAYCHEM-IM-INSTALL025-RaystatEX02-ML-2204 PCN 865201-000
United Kingdom
Tel. 0800 969 013
Fax 0800 968 624
salesthermalUK@nVent.com
nVent.com/RAYCHEM