Endress+Hauser EngyCal RH33 Technical specifications

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Brief Operating Instructions
EngyCal RH33
Universal BTU meter
These Instructions are Brief Operating Instructions; they are
not a substitute for the Operating Instructions pertaining to
the device.
For detailed information, refer to the Operating Instructions
and other documentation.
Available for all device versions via:
• Internet: www.endress.com/deviceviewer
• Smart phone/Tablet: Endress+Hauser Operations App
KA00289K/09/EN/04.21
71545304
2021-09-16

EngyCal RH33
2 Endress+Hauser
Order code:
Ext. ord. cd.:
Ser. no.:
www.endress.com/deviceviewer Endress+Hauser
Operations App
XXXXXXXXXXXX
XXXXX-XXXXXX
XXX.XXXX.XX
Serial number
1.
3.
2.
A0023555

EngyCal RH33 Table of contents
Endress+Hauser 3
Table of contents
1 About this document .............................................................. 3
1.1 Document conventions .................................................................. 3
2 Safety instructions ................................................................ 6
2.1 Requirements for the personnel ............................................................ 6
2.2 Intended use .......................................................................... 6
2.3 Workplace safety ...................................................................... 6
2.4 Operational safety ......................................................................6
2.5 Conversion and consequences of conversion ................................................... 6
2.6 Product safety ......................................................................... 7
2.7 IT security ............................................................................ 7
3 Identification ..................................................................... 7
3.1 Device designation ..................................................................... 7
3.2 Scope of delivery ....................................................................... 9
3.3 Certificates and approvals ................................................................ 9
4 Mounting ....................................................................... 10
4.1 Incoming acceptance, transport, storage .................................................... 10
4.2 Dimensions ..........................................................................11
4.3 Mounting requirements ................................................................ 13
4.4 Mounting ........................................................................... 13
4.5 Installation instructions for temperature sensor(s) ............................................. 18
4.6 Requirements for sizing .................................................................19
4.7 Post-mounting check .................................................................. 19
5 Wiring ........................................................................... 20
5.1 Connection instructions .................................................................20
5.2 Quick wiring guide .................................................................... 20
5.3 Connecting the sensors ................................................................. 23
5.4 Outputs ............................................................................ 28
5.5 Communication ...................................................................... 28
5.6 Post-connection check ..................................................................30
6 Operation ....................................................................... 31
6.1 General information regarding operation .................................................... 31
6.2 Display and operating elements ........................................................... 32
6.3 Operating matrix ..................................................................... 35
7 Commissioning .................................................................. 36
7.1 Quick commissioning .................................................................. 36
1 About this document
1.1 Document conventions
1.1.1 Safety symbols
DANGER
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in
serious or fatal injury.

About this document EngyCal RH33
4 Endress+Hauser
WARNING
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
serious or fatal injury.
CAUTION
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
minor or medium injury.
NOTICE
This symbol contains information on procedures and other facts which do not result in
personal injury.
1.1.2 Electrical symbols
Symbol Meaning
A0011197
Direct current
A terminal to which DC voltage is applied or through which direct current flows.
A0011198
Alternating current
A terminal to which alternating voltage is applied or through which alternating current flows.
A0017381
Direct current and alternating current
• A terminal to which alternating voltage or DC voltage is applied.
• A terminal through which alternating current or direct current flows.
A0011200
Ground connection
A grounded terminal which, as far as the operator is concerned, is grounded via a grounding system.
A0011199
Protective ground connection
A terminal which must be connected to ground prior to establishing any other connections.
A0011201
Equipotential connection
A connection that has to be connected to the plant grounding system: This may be a potential
equalization line or a star grounding system depending on national or company codes of practice.
A0012751
ESD - electrostatic discharge
Protect the terminals from electrostatic discharge. Failure to observe this may result in the destruction
of parts of the electronics.
1.1.3 Symbols for certain types of information
Symbol Meaning Symbol Meaning
Permitted
Procedures, processes or actions that
are permitted.
Preferred
Procedures, processes or actions that
are preferred.
Forbidden
Procedures, processes or actions that
are forbidden.
Tip
Indicates additional information.
Reference to documentation
A
Reference to page

EngyCal RH33 About this document
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Symbol Meaning Symbol Meaning
Reference to graphic
1.
,
2.
,
3.
… Series of steps
Result of a step Visual inspection
1.1.4 Symbols in graphics
Symbol Meaning Symbol Meaning
1, 2, 3,... Item numbers
1.
,
2.
,
3.
… Series of steps
A, B, C, ... Views A-A, B-B, C-C, ... Sections
-
Hazardous area
.
Safe area (non-hazardous area)
1.1.5 Tool symbols
Symbol Meaning
A0011220
Flat-blade screwdriver
A0011219
Phillips screwdriver
A0011221
Allen key
A0011222
Open-ended wrench
A0013442
Torx screwdriver

Safety instructions EngyCal RH33
6 Endress+Hauser
2 Safety instructions
Safe operation of the device is only guaranteed if the Operating Instructions have been read
and the safety instructions they contain have been observed.
2.1 Requirements for the personnel
The personnel must fulfill the following requirements for its tasks:
‣Trained, qualified specialists must have a relevant qualification for this specific function
and task.
‣Are authorized by the plant owner/operator.
‣Are familiar with federal/national regulations.
‣Before starting work, read and understand the instructions in the manual and
supplementary documentation as well as the certificates (depending on the application).
‣Follow instructions and comply with basic conditions.
2.2 Intended use
The BTU meter is a device for measuring energy flow in heating and cooling systems. The
mains-powered arithmetic unit can be used universally in industry, long-distance heat and
building systems.
• The manufacturer accepts no liability for damages resulting from incorrect use or use other
than that designated. It is not permitted to convert or modify the device in any way.
• The device may only be operated when installed.
2.3 Workplace safety
For work on and with the device:
‣Wear the required personal protective equipment according to national regulations.
If working on and with the device with wet hands:
‣Due to the increased risk of electric shock, wear suitable gloves.
2.4 Operational safety
Risk of injury.
‣Operate the device in proper technical condition and fail-safe condition only.
‣The operator is responsible for interference-free operation of the device.
2.5 Conversion and consequences of conversion
NOTICE
Repair/conversion/modification results in loss of approval for custody transfer
‣Repair/conversion/modification is possible, but results in the device losing its current
custody transfer approval. This means that following repair/conversion/modification, the
customer is responsible for ensuring that the instrument is inspected on site by an
approved calibration authority (e.g. calibration officer) for the purpose of recalibration.

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2.6 Product safety
This measuring device is designed in accordance with good engineering practice to meet state-
of-the-art safety requirements, has been tested, and left the factory in a condition in which it
is safe to operate.
It meets general safety standards and legal requirements. It also complies with the EC
directives listed in the device-specific EC Declaration of Conformity. Endress+Hauser confirms
this by affixing the CE mark to the device.
Furthermore, the device meets the legal requirements of the applicable UK regulations
(Statutory Instruments). These are listed in the UKCA Declaration of Conformity along with
the designated standards.
By selecting the order option for UKCA marking, Endress+Hauser confirms a successful
evaluation and testing of the device by affixing the UKCA mark.
Contact address Endress+Hauser UK:
Endress+Hauser Ltd.
Floats Road
Manchester M23 9NF
United Kingdom
www.uk.endress.com
2.7 IT security
Our warranty is valid only if the device is installed and used as described in the Operating
Instructions. The device is equipped with security mechanisms to protect it against any
inadvertent changes to the settings.
IT security measures, which provide additional protection for the device and associated data
transfer, must be implemented by the operators themselves in line with their security
standards.
3 Identification
3.1 Device designation
3.1.1 Nameplate
Compare the nameplate on the device with the following diagram:

Identification EngyCal RH33
8 Endress+Hauser
XX.XVA/X.XW XX.XVA/X.XW
16YV 16YV
EngyCal
Made in Germany 20xx
87484 Nesselwang
100-230V (-15%/+10%) 50/60Hz
Ord. cd.:
Ser. no.:
Ext. Ord. cd.:
RX33-xx1xxxxxxxxxxxxxxxLU
xxxxxxxxxxxxxxxx
Xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
FW: Firmware Dev_Rev.: X
-20°C(-4°F) < Ta < +60°C(140°F)
Other approvals
EngyCal
Made in Germany 20xx
87484 Nesselwang
Ord. cd.:
Ser. no.:
Ext. Ord. cd.:
RX33-xx2xxxxxxxxxxxxxxxLU
xxxxxxxxxxxxxxxx
Xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
24V (-50%+75%) 24V (±50%) 50/60Hz
FW: Firmware Dev_Rev.: X
Other approvals
-20°C(-4°F) < Ta < +60°C(140°F)
1
2
3
4
5
6
7
8
9
10
A0013583
 1 Device nameplate (example)
1 Device tag name
2 Order code and serial number
3 Supply voltage
4 Power consumption
5 Firmware version
6 Approvals, if available
7 Ambient temperature range
8 Device revision
9 Device protected by double or reinforced seal
10 Place and year of manufacture
3.1.2 Serial number on front of device
A0024097
 2 Serial number on front of device
3.1.3 Front foil for devices with approval for custody transfer
For devices with the option of approval for custody transfer, the front foil is imprinted with
the following information:

EngyCal RH33 Identification
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Flow: Display
Installation: Display
Fluid: Display
DQ: 3…297K
PT 100/500/1000
Class: IP65/66 M1/E2
QCooling: 0…300°C
DE-21-MI004-PTB015
QHeating: 0…300°C
A0013584
 3 Labeling of front foil for devices with approval for custody transfer
3.2 Scope of delivery
The scope of delivery comprises:
• EngyCal (field housing)
• Wall mounting plate
• Hard copy of Brief Operating Instructions
• Optional RTD assembly
• Optional 3 pc. connecting terminal (each 5-pin)
• Optional interface cable in a set with "FieldCare Device Setup" parameterization software
• Optional Field Data Manager software MS20
• Optional mounting hardware for DIN rail, panel mounting, pipe mounting
• Optional overvoltage protection
Please note the device accessories in the "Accessories" section of the Operating
Instructions.
3.3 Certificates and approvals
The BTU meter and the pair of temperature sensors (optionally available) meet the
requirements of Directive 2014/32/EU (L 96/149) (Measurement Instruments Directive,
MID) and OIML R75 and EN-1434.
If the arithmetic unit with temperature sensors is to be used in commercial applications, the
flow sensor must also have a type approval (incl. conformity assessment) according to MID.
Measuring devices with MID approval have the MID mark on the front foil. →  1,  8. This
approval replaces the initial calibration on-site.
The calibrated arithmetic unit can be set individually onsite. Custody transfer-related
parameters, such as the pulse value of the flow transmitter, can be changed up to three times.
The changes to the custody transfer-related parameters are recorded in a custody transfer
logbook. This allows individual defective sensors to be replaced in the field without losing the
custody transfer status.

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The device also has a national approval as a BTU meter for cooling or for combined heating/
cooling applications. The initial calibration of these devices is always carried out on-site by a
calibration officer.
3.3.1 CE mark
The product meets the requirements of the harmonized European standards. As such, it
complies with the legal specifications of the EC directives. The manufacturer confirms
successful testing of the product by affixing to it the CE-mark.
4 Mounting
4.1 Incoming acceptance, transport, storage
Compliance with the permitted environmental and storage conditions is mandatory. The exact
specifications for this are provided in the "Technical Information" section of the Operating
Instructions.
4.1.1 Incoming acceptance
On receipt of the goods, check the following points:
• Is the packaging or the content damaged?
• Is the delivery complete? Compare the scope of delivery against the information on your
order form.
4.1.2 Transport and storage
Please note the following:
• Pack the device in such a way as to protect it reliably against impact for storage (and
transportation). The original packaging provides optimum protection.
• The permitted storage temperature is –40 to +85 °C (–40 to +185 °F); it is possible to store
the device at borderline temperatures for a limited period (48 hours maximum).

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4.2 Dimensions
144 (5.67)
144 (5.67)
175 (6.89)
138 (5.43)
77 (3.03)
138 (5.43)
103.1 (4.06)
A0013438
 4 Dimensions of the device in mm (in)
73 (2.87)
148 (5.83)
160 (6.3)
85 (3.35)
A0014169
 5 Dimensions of the mounting plate for wall, pipe and panel mounting in mm (in)

Mounting EngyCal RH33
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138 (5.43)
138 (5.43)
A0014171
 6 Dimensions of the panel cutout in mm (in)
120 (4.72) 7.7 (0.3)
141.9 (5.59)
A0014610
 7 Dimensions of DIN rail adapter in mm (in)

EngyCal RH33 Mounting
Endress+Hauser 13
M4
L
80 (3.15) 10 (0.4)
IL
A0015313
 8 RTD assembly (optional accessory), dimensions in mm (in)
L Immersion length, specified when ordered
IL Insertion length = L + extension neck length (80 mm (3.15 in)) + 10 mm (0.4 in)
4.3 Mounting requirements
With the appropriate accessories, the device with field housing is suitable for wall mounting,
pipe mounting, panel mounting and DIN rail installation.
The orientation is determined by the legibility of the display. Connections and outputs are fed
out of the bottom of the device. The cables are connected via coded terminals.
Operating temperature range: –20 to 60 °C (–4 to 140 °F)
You can find more information in the "Technical data" section.
NOTICE
Overheating of the device due to insufficient cooling
‣To avoid heat buildup, please always ensure that the device is sufficiently cooled. Operating
the device in the upper temperature limit range decreases the operating life of the display.
4.4 Mounting
4.4.1 Wall mounting
1. Use the mounting plate as the template for drilled holes, dimensions →  5,  11

Mounting EngyCal RH33
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2. Attach the device to the mounting plate and fasten it in place from the rear using 4
screws.
3. Fasten the mounting plate to the wall using 4 screws.
2.
3.
2.
A0014170
 9 Wall mounting
4.4.2 Panel mounting
1. Make the panel cutout in the required size, dimensions →  6,  12
2.
1
A0014172
 10 Panel mounting
Attach the seal (item 1) to the housing.

EngyCal RH33 Mounting
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3.
2
A0014173
 11 Preparing the mounting plate for panel mounting
Screw the threaded rods (item 2) into the mounting plate (dimensions →  5,  11).
4.
2
3
A0014174
 12 Panel mounting
Push the device into the panel cutout from the front and attach the mounting plate to
the device from the rear using the 4 screws provided (item 3).
5. Fasten the device in place by tightening the threaded rods.

Mounting EngyCal RH33
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4.4.3 Support rail/DIN rail (to EN 50 022)
1.
1
2
A0014176
 13 Preparing for DIN rail mounting
Fasten the DIN rail adapter (item 1) to the device using the screws provided (item 2)
and open the DIN rail clips.
2.
A0014177
 14 DIN rail mounting
Attach the device to the DIN rail from the front and close the DIN rail clips.

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4.4.4 Pipe mounting
1.
1.
A0014178
 15 Preparing for pipe mounting
Pull the steel belts through the mounting plate (dimensions →  5,  11) and fasten
them to the pipe.
2.
2. 2.
A0014179
 16 Pipe mounting
Attach the device to the mounting plate and fasten it in place using the 4 screws
provided.

Mounting EngyCal RH33
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4.5 Installation instructions for temperature sensor(s)
BA C
D
L
L
A0008603
 17 Installation types for temperature sensors
A - BFor cables with a small cross-section, the sensor tip must reach to the piping axis or a little farther
(=L).
C - D Slanted orientation.
The immersion length of the thermometer influences the accuracy. If the immersion length is
too small, errors in the measurement are caused by heat conduction via the process
connection and the container wall. For installation in a pipe, therefore, the recommended
installation depth ideally corresponds to half of the pipe diameter.
• Installation possibilities: Pipes, tanks or other plant components
• Minimum insertion depth = 80 to 100 mm (3.15 to 3.94 in)
The insertion depth should be at least 8 times the diameter of the thermowell. Example:
Thermowell diameter 12 mm (0.47 in) x 8 = 96 mm (3.8 in). We recommend a standard
insertion depth of 120 mm (4.72 in).
For pipes with small nominal diameters, ensure that the tip of the thermowell extends
far enough into the process so that it also protrudes past the axis of the pipe
(→  17,  18, item A and B). Another solution may be diagonal installation
(→  17,  18, item C and D). When determining the immersion length or installation
depth, all the parameters of the thermometer and of the process to be measured must be
taken into account (e.g. flow velocity, process pressure).
Refer also to the installation recommendations EN1434-2 (D), Figure 8.

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4.6 Requirements for sizing
To avoid systematic errors, the temperature sensors must be installed shortly upstream and
shortly downstream from the heat exchanger. If the pressure difference between the
temperature measuring points is too large, this can result in an excessively large systematic
error, see the table below.
Temperature differential in [K]
Diff in [bar] 3 5 10 20 30 40 50 60
0.5 0.2 0.2 0.1 0.1 0.1 0 0 0
10.5 0.4 0.3 0.2 0.1 0.1 0.1 0.1
20.9 0.7 0.5 0.3 0.2 0.2 0.1 0.1
31.4 1.1 0.8 0.5 0.3 0.2 0.2 0.2
41.8 1.5 1.0 0.6 0.4 0.3 0.3 0.2
52.3 1.9 1.3 0.8 0.5 0.4 0.3 0.3
62.7 2.2 1.5 0.9 0.6 0.5 0.4 0.3
73.2 2.6 1.9 1.1 0.7 0.6 0.5 0.4
83.6 3.0 2.0 1.2 0.9 0.7 0.5 0.4
94.1 3.3 2.3 1.4 1.0 0.7 0.6 0.5
10 4.5 4.0 2.5 1.5 1.1 0.8 0.7 0.5
The values are indicated as factors of the maximum permitted error of the BTU meter (with
ΔΘmin = 3 K (5.4 °F)). The values below the gray line are higher than 1/3 of the maximum
permitted error of the BTU meter (with ΔΘmin = 3 K (5.4 °F)).
If 2 different heat carriers (e.g. room heating and household hot water) merge shortly
upstream from the temperature sensor, the optimum position of this sensor is directly
downstream from the flow measuring point.
4.7 Post-mounting check
To install the BTU meter and the associated temperature sensors, observe the general
installation instructions according to EN 1434 Part 6 and the Technical Guidelines TR-K 9 of
the PTB (the German National Metrology Institute). TR-K 9 is available to download from the
PTB website.

Wiring EngyCal RH33
20 Endress+Hauser
5 Wiring
5.1 Connection instructions
LWARNING
Danger! Electric voltage!
‣The entire connection of the device must take place while the device is de-energized.
LCAUTION
Pay attention to additional information provided
‣Before commissioning, ensure that the supply voltage corresponds to the specification on
the nameplate.
‣Provide a suitable switch or power-circuit breaker in the building installation. This switch
must be provided close to the device (within easy reach) and marked as a circuit breaker.
‣An overload protection element (rated current ≤ 10 A) is required for the power cable.
To install the BTU meter and the associated components, observe the general installation
instructions according to EN1434 Part 6.
5.2 Quick wiring guide
156252 53
+
378454 55
+
++ UI
10 11 50 51
60 61 62 63
1+ 2+1- 2-
70 71 80 81 82 81 90 91
LPS
R
13
R
14
R
23
R
24
L/+N/-
T Warm
RTD or 0/4...20 mA
T Cold
RTD or 0/4...20 mA
Flow
Pulse or 0/4...20 mA
2x Open Col. 2x Digital In
I/Pulse Out
Relay 1 Relay 2 Power
supply
+- 1+ 1- 2+ 2- + -
A0022341
 18 Connection diagram of the device
Terminal assignment
• In the case of heat differential /T, the temperature sensor for T condensate must be
connected to the T Warm terminals and the temperature sensor for T steam to the T
Cold terminals.
• In the case of heat differential /p, the temperature sensor for T condensate must be
connected to the T Warm terminals.