Raychem HWAT-ECO Installation Manual
Raychem HWAT-ECO is an advanced hot water temperature maintenance system controller that offers precise temperature control, energy-saving features, and enhanced safety for your water heating system. With its ability to set and maintain desired water temperatures, the HWAT-ECO helps prevent scalding and ensures a consistent hot water supply. It also incorporates a heat-up cycle function to quickly raise the water temperature when needed, reducing waiting time for hot water.
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HWAT-ECO
INSTALLATION AND OPERATION MANUAL FOR
HOT WATER TEMPERATURE MAINTENANCE
SYSTEM ELECTRONIC CONTROLLER
Download Full EN Manual nVent.com
Important Safeguards and Warnings
WARNING: FIRE AND SHOCK HAZARD
nVent RAYCHEM HWAT Systems must be installed correctly to ensure proper operation and to prevent shock and fire. Read these important warnings and carefully follow all the installation instructions.
• To minimize the danger of fire from sustained electrical arcing if the heating cable is damaged or improperly installed, and to comply with nVent Thermal Management requirements, agency certifications, and national electrical codes, ground-fault equipment protection must be used on each heating cable branch circuit. Arcing may not be stopped by conventional circuit breakers.
• Approvals and performance are based on the use of nVent Thermal
Management parts only. Do not substitute parts or use vinyl electrical tape.
• Bus wires will short if they contact each other. Keep bus wires separated.
• Connection kits and heating cable ends must be kept dry before and during installation.
• The black heating cable core is conductive and can short. They must be properly insulated and kept dry.
• Damaged bus wires can overheat or short. Do not break bus wire strands when preparing the cable for connection.
• Damaged heating cable can cause electrical arcing or fire. Do not use metal attachments such as pipe straps or tie wire. Use only nVent Thermal Management approved tapes and cable ties to secure the cable to the pipe.
• Do not attempt to repair or energize damaged cable. Remove damaged cable at once and replace with a new length using the nVent RAYCHEM RayClic-S splice kit. Replace damaged connection kits.
• Use only fire-resistant insulation which is compatible with the application and the maximum exposure temperature of the system to be traced.
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Table of Contents
1
General Information
1.1 Use of the Manual
1.2 Features
1.3 Technical Data
1.4 Care and Maintenance
1.5 Heating Cables
2
Installation
2.1 Installing the Controller
2.2 Wiring the Controller
3
Programming the Controller
3.1 Programming Overview
3.2 Initializing the Controller
3.3 Advanced Programming
4
Error/Alarms and Troubleshooting
5
Pre-Defined Programs
6
Heat-Up Cycle Graphs
7
Cool-Down Graph
50
52
26
26
27
33
9
9
13
1
1
1
3
7
7
45
54
nVent.com | iii
A
F
SYSTEM
HWAT
ATION
ELECTRONIC
-ECO
TEMPERA
CONTROLLER
FOR
THERMAL
MANA
GEME
NT S
OLUTIONS
WWW
.TH
ERMAL.
nVen t.COM
Item Qty Description
A 1 HWAT-ECO controller
B 1 Temperature sensor with 13 ft (4 m) cable
C 2 Mounting screws
D 2 Mounting washers
E 1 Aluminum tape
F 1 Manual
Figure 1: Kit contents
B
C
D
E
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6.5"
(165 mm)
3.4"
(85 mm)
F
G
H
C
D
A
B
E
G
H
A
B
C
D
E
F
2 ea - 1/2" conduit entries
To water heater sensor
To HWAT-ECO network/alarm entries
Power supply (green LED)
Power to heating cable (green LED)
Heat-up cycle (green LED) - increased risk of scalding
Pipe Temperature alarm (requires installed sensor) (green LED)
Alarm (red LED)
Escape, backspace; NO; or display maintain temperature setpoint
Arrow keys: to change menu selection or position the cursor
Confirm selection, new value or YES
Figure 2: HWAT-ECO controller
nVent.com | v
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1.1
1
General Information
Use of the Manual
This manual covers the installation and operation of the nVent RAYCHEM HWAT-ECO controller and must be used with the following additional documents:
• HWAT System Product and Selection Design Guide
(H57538)
• HWAT System Installation and Operation Manual
(H57548)
Important: For the nVent warranty and agency approvals to apply, the instructions included in this manual and product packages must be followed.
1.2 Features
The HWAT-ECO controller is designed for operation with nVent RAYCHEM HWAT-Y2 and HWAT-R2 selfregulating heating cables. The HWAT-ECO controller provides the following features:
• Flexible temperature control of hot water
temperature maintenance systems.
• Integrated function that lowers the maintain
temperature during low use hours to save energy.
• Heat-Up cycle function that increases the water temperature in a stagnant pipe.
nVent.com | 1
1
General Information
• Building Management System (BMS) interface that receives a DC voltage to set the maintain temperature.
• Alarm relay to signal power, temperature, or communication problems.
• Pipe temperature monitoring, low temperature alarm and high temperature cut-out.
• Master/slave function that allows one HWAT-ECO to control up to eight additional HWAT-ECO controllers.
• 9 pre-defined programs that can be customized by the user.
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1.3
1
General Information
Technical Data
Use Only for HWAT-Y2 and
HWAT-R2 heating cables
1
)
4 ) o 14
1 ) o )
Maintain temperature setpoint
Hot water piping ambient temperature
Controller ambient temperature
Switching capacity
Operating voltage
Internal power consumption
Circuit protection
(not provided with
HWAT-ECO controller)
Power terminal block
4 ambient
2.5 W
) o 1 4
24 A 208/240 Vac max.
208/240 (±10%), 60 Hz
)
Max. 30 A with 30 mA ground-fault protection
16–10 AWG (1.5–4 mm
Use copper conductors only
2
)
1 ) Internal temperature alarm
BMS control voltage
BMS cable maximum length
0–10 Vdc
328 ft (100 m) nVent.com | 3
1
General Information
Alarm contacts
Alarm events
Max. 24 Vdc or 24 Vac,
1A, SPST, voltage free,
NO/NC
• Loss of power
• Controller reinitialized
• Internal controller temperature too high
• Lost date and time settings
• Internal failure
• Pipe temperature too high (optional)
• Pipe heater temperature too low (optional)
• Network error
Power correction factor To increase or decrease your actual pipe maintain temperature or adjust for plastic pipe.
Pipe temperature sensor Thermistor with 13 ft
4 ) ea p o e
A PT100 RTD may be optionally used. Max length is 328 ft (100 m)
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1
General Information
Electromagnetic
Real time clock
Clock accuracy
Enclosure rating
Enclosure material
Mounting
Conduit entries
Cable gland
Default programs
Program settings
Complies to EN 5014-1
Compatibility (EMC) for emission and 60730-1 for immunity
Leap year correction
±10 minutes per year
NEMA 12 (IP54) – indoor use only
ABS
Wall mount with two screws or optional DIN rail
2 ea – 1/2 in conduit entries
3-hole grommet
Maximum cable size:
• 2-wire: 20 AWG (0.5 mm
2
• 4-wire: 24 AWG (0.2 mm 2
)
)
9 pre-defined programs that can be customized by user
48 1/2-hour time blocks of the following program settings: Off, Economy,
Maintain and Heat-Up cycle nVent.com | 5
1
General Information
Password
Master/slave
Master/slave cable
4-digit password protection
Master is selectable in the controller, up to 8 slaves can be connected
2-wire, min. 24 AWG
(0.2 mm
2
) twisted pair and insulation of 300 V,
Max length cable is 100 m
Parameters in memory All parameters are stored in nonvolatile memory, except time and date
Clock backup time Rechargable Lithium
battery. Battery will retain time and date for up to 30 days when power is lost
Approvals
Type 12
Energy Management Equipment
(for use with HWAT-R2 and HWAT-Y2 heating cables only.)
80BJ
Weight
Size
2 lbs (1 kg)
6.5 in x 3.4 in x 2.8 in
(165 mm x 85 mm x
71 mm)
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1.4
1
General Information
Care and Maintenance
To clean the HWAT-ECO use a damp cloth. Do not use solvents. Do not pour water directly on the device. Do not use a water hose or high pressure cleaner.
Important: In case of questions or product failure, please contact your nVent representative, or call nVent at 800-545-6258.
1.5 HWAT Heating Cables
Maintain temperature
Depending on the ambient temperature and voltage,
HWAT-Y2 is designed to maintain temperatures up to
1 ) an e pe a e p o 14
e gne o a n a n
)
Installing the heating cables
Install the HWAT heating cable system as instructed in the HWAT System Installation and Operation
Manual (H57548). The controller must be installed by a professional electrical installer familiar with electrical safety codes and practices. nVent.com | 7
1
General Information
Ground-fault protection
WARNING: To minimize the danger of fire from
sustained electrical arcing if the heating cable is damaged or improperly installed, and to comply with the requirements of approvals agencies, nVent and national electrical codes, ground-fault equipment protection must be used on each heating cable branch circuit. Arcing may not be stopped by conventional circuit protection. The HWAT-ECO does not include ground-fault protection.
Pre-Installation testing
Prior to installing the HWAT-ECO controller, perform the insulation resistance (Megger) test and circuit length verification (Capacitance) test on the heating cable as detailed in the HWAT System Installation and Operation Manual (H57548).
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2
2.1
Installation
Installing the Controller
Install the controller in an indoor, dry, clean,
accessible location. If using the optional pipe
temperature sensor, make sure you install the
controller within 328 ft (100 m) of where you want to monitor the pipe temperature.
Opening the controller
WARNING: To prevent shock, always switch off the power supply (circuit breaker) before opening the controller.
The HWAT-ECO has a removable front cover. Both the cover and the box have electronic parts and are connected to each other by a 14-pin connector. First unscrew the four screws in the cover. Carefully pull the cover straight out, not sideways! nVent.com | 9
2
Installation
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Figure 3: Opening the controller
Wall mounting the controller
Mount the controller using either of the options below:
1. You can mount the controller to the wall using the two supplied screws and sealing rings in the two holes located inside the bottom part of the controller.
2
Installation
5.9" (148 mm)
1.7"
(43 mm)
B A TEMP BMS
Figure 4: Hole locations for mounting with screws
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2
Installation
2. Optionally you can mount the controller using DIN
35 Rail mounting.
Optional Din Rail Mount
(Rail not provided)
Mounting
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Removing
Press tab to remove box
Figure 5: Mounting with DIN 35 Rail
2.2
2
Installation
Wiring the Controller
The diagram below shows the arrangement of the terminal blocks for power, alarm, pipe temperature sensor, BMS and network.
HWAT-ECO
General Arrangement
Power terminal block
Alarm terminal block
Sensor, BMS, and network terminal block
Ground
B A
TEMP BMS
Ø
1
Ø
2
Ø
1
Ø
HWAT Line
2
Figure 6: General arrangement for terminal blocks
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2
Installation
The diagram below shows the connection of a single controller (without optional water heater sensor,
BMS, network and alarm connections).
Important: Tighten the terminal screws to 6 inchlbs. (0.68 N-m)
Wiring diagram for HWAT-ECO
To
HWAT heating cable
Incoming power
208/240 Vac Max
Ground
B A TEMP BMS
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1/2"
Conduits
RayClic-PC
Ø
Ø
G
Max. 30 A ground fault circuit breaker
208-240 Vac
HWAT heating cable
Figure 7: Connecting a single controller
(w/o sensor, BMS, network and alarm connections)
2
Installation
For controlling multiple HWAT circuits with the same programming parameters (i.e. voltage, maintain temperature, ambient temperature, economy temperature), connect the heating cable output relay to an external contactor coil(s).
HWAT-ECO internal relay
Ground
Line voltage
208 V or 240 V
Panel energized light
ø1 ø2 ø3
N
Three-pole main CB
*Contactor coil
(208 or 240 V)
Three-pole main contactor
HWAT-ECO internal switch
Two-pole with 30-mA ground-fault trip (208/240 Vac)
* Install contactor manufacturer’s recommended snubber circuit across the coil
Power connection
Heating cable
End seal
HWAT heating cable
Two-pole with 30-mA ground-fault trip (208/240 Vac)
HWAT heating cable
Braid/pipe
Figure 8: Multiple HWAT circuits connection
Pipe temperature sensor (optional usage)
Installation of the pipe temperature sensor is optional.
If installed, the HWAT-ECO provides low temperature alarm and high temperature cut-out.
The temperature sensor should be connected to a single or master controller only. Connect both wires nVent.com | 15
2
Installation
of the temperature sensor to the TEMP terminal in the controller (PL4). The sensor wires do not have a special polarity. To connect a wire, use a screwdriver to push down the orange tab on the side of the terminal. Put the wire into the hole and release the orange tab.
Standard temperature sensor
PL3 PL4 PL5
Alarm,
Sensor, and BMS terminals
PL6
B A
TEMP BMS
PT100 sensor (2 wire)
PL3 PL4 PL5
B A
TEMP BMS
B A
TEMP
short for
PT100
BMS
Figure 9: TEMP terminal location and sensor wiring
Optionally, PT100 RTDs from the water heater can be used. To install a PT100 sensor first connect a jumper between the terminals indicated in Figure 9, then connect the two wires from the RTD. If you are using a three wire sensor, remove the compensation lead and only connect the two measurement wires.
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2
Installation
The pipe temperature sensor must be placed on
1-inch diameter pipes or larger, installed opposite from the HWAT heating cable to accurately measure the pipe temperature.
The temperature sensor cable is 13 ft 3 in (4 m) in length, however the user can extend the cable up to
328 ft (100 m) by splicing a length of 300 volt, 18 AWG
2
) cable.
Temperature sensor
Insulation
180°
Heating cable
HWAT-Y2
HWAT-R2
A
Hot water out
Tempered water out
B
Hot water in
Water heater mixing valve
Cold water in
Figure 10: Positioning temperature sensor (optional)
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2
Installation
Alarm wiring (optional)
The alarm contact (24 Vac, 24 Vdc, 1A) inside the controller can be used to switch an external device.
The contact is closed during operation and open during an alarm or during loss of power. In a network, all alarm contacts should be connected in series.
Alarm,
Sensor, and BMS terminals
NC O NO
PL6
B A
TEMP BMS
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Figure 11: Connecting the alarm contact
The alarm terminal (PL6) is located in the upper right corner of the controller and has the text
“alarm contact” next to it. To connect a wire, use a
screwdriver to push down the orange tab on the side of the terminal. Put the wire into the hole and release the orange tab. The wires used for the alarm contact should be rated for 300 V. See “Chapter 4, Error/
2
Installation
Alarms and Troubleshooting” for more information about alarm conditions.
The alarm contact is designed as a fail safe mode and can be wired for normally open (NO) or
normally closed (NC) operation. The following table
summarizes the relay positions in the different
controller states:
Position
Power Off
Power On
Alarm Mode
NC
Open
Closed
Open
NO
Closed
Open
Closed
Network
The Master/slave function allows one HWAT-ECO to control up to eight additional HWAT-ECO controllers.
Connect all HWAT-ECO controllers to each other in parallel using the A and B inputs on terminal (PL3).
This means that several controllers will have two wires in one hole. The wire should be a twisted pair and be rated for 300 V. The total maximum length of
a e e een a on o e 1 )
Be careful not to mix A and B connections. To
connect a wire, use a screwdriver to push down the orange tab on the side of the terminal. Put the wire into the hole and release the orange tab. nVent.com | 19
2
Installation
B A
MASTER
TEMP BMS B A
SLAVE 1
TEMP BMS
20 | nVent.com
Figure 12: Networking controllers together
The diagram below shows the connection of multiple
controllers (with optional RS-485 connections).
2
Master
Installation
Slave 1 Slave 2
RS-485 RS-485
L L
208/240V
Alarm
BMS
Sensor
L
L
208/240V
L
L
208/240V
HWAT heating cable
HWAT heating cable
Figure 13: Connecting multiple controllers (with
RS-485)
HWAT heating cable max. 20 AWG
(0.5 mm 2 ) max. 24 AWG
(0.2 mm 2 )
When multiple controllers are networked and you are using BMS and Alarm functions, you must use a
4-wire conductor.
Figure 14: Combine alarm and BMS wire in 4-wire cable
Important: For master/slave combination with alarm function, the alarms are connected in series by a
RS485 wire. Since the cable gland grommet has only o es ou ust co ine t e i e n t e bM wire in a 4-wire cable.
nVent.com | 21
2
Installation
Building Management System (BMS) (optional)
See Table 5 on page 39.
The BMS input of the HWAT-ECO is a 0 to 10-Vdc input. If the controller is programmed to have a
BMS connection, the BMS controls the temperature setpoint. Using 300-V rated cable, connect the BMS signal wire to terminal (PL5). Connect the ground wire to the “–” and the 0-10 V output to the “+” terminal.
Alarm,
Sensor, and BMS terminals
PL6
PL3 PL4 PL5
B A
TEMP BMS
0-10v ground
BMS
22 | nVent.com
Figure 15: Connecting the BMS
2
Installation
Figure 16 shows the connection of a single controller
(with optional sensor, BMS and alarm connections).
Master
LL
208/240V
Alarm
BMS
Sensor
RayClic-PC
HWAT heating cable
Figure 16: Single controller connection
(with sensor, BMS, and alarm connections)
nVent.com | 23
2
Installation
Closing the controller
Position the cover in front of the wall-mounted box.
The separation sheet inside the controller will help guide the cover and the connector. Push the cover onto the box. Note that the connector pins will offer some resistance. Put the screws in place and tighten to 10 inch-lbs (1.13 N-m).
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Figure 17: Closing the controller
2
Installation
02-11-2012 09:30
Maintain *
F
G
H
C
D
A
B
E
C
D
A
B
E
F
Power supply (green LED)
Power to heating cable (green LED)
Heat-up cycle (green LED) - increased risk of scalding
Pipe temperature alarm (requires installed sensor) (green LED)
Alarm (red LED)
Escape, backspace; NO; or display maintain temperature setpoint
G
Arrow keys: to change menu selection or position the cursor
H
Confirm selection, new value or YES
Figure 18: Controller display
nVent.com | 25
3.1
3
Programming the Controller
Programming Overview
Display functions
Quickstart
Any key to start
The display has two lines with 16 characters each.
The display shows the following text on start up:
The HWAT-ECO has six buttons:
Up/Down/Left/Right arrows
Escape (ESC) button
Enter button
You can program the HWAT-ECO by simply executing the Quickstart program which is suitable for normal operations. In addition, advanced programming can be used to modify initial settings, set additional features such as BMS and Network Master, reinitialize the entire controller, or customize the pre-defined programs.
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3.2
3
Programming the Controller
Initializing the Controller
The first time you power up the controller, you must execute the Quickstart program to set the initial settings. Once initialized continue to power the controller for at least 6 hours to charge the internal battery.
TABLE 1: QUICKSTART MENU
Time and date Year
Month
Day
Hour
Minutes
Cable type HWAT-R2
HWAT-Y2
Voltage select 208 Vac
Units
240 Vac
English
Metric
Ambient temp.
Maintain temp.
Economy temp
.
Select Year
Select Month
Select Day
Select Hour
Select Minutes
“Press Enter for this cable type.”
“Press Enter for this cable type.”
“Press Enter for this voltage type.”
“Press Enter for this voltage type.”
“Press Enter for this unit type.”
“Press Enter for this unit type.”
“Enter ambient temp.”
“Enter maintain temp. setpoint”
“Enter economy temp. setpoint” nVent.com | 27
3
Programming the Controller
TABLE 1: QUICKSTART MENU
Default program Constant
Apartments
Family home
Prison
Hospital
Nursing home
Hotel
Sports center
Convales. home
“Scroll to program and press
Enter.”
During the Quickstart you can press the ESC button to go back to a previous menu. On startup the
display will show the following text:
Quickstart
Any key to start
Press a key to start, and the following menus appear:
Time and Date
Use the up/down arrows to select the year and press
Enter. Then, select and enter the month, day, hour, and minutes. The time and date is contained in volatile memory, and is maintained during power outages by an internal rechargeable battery. Power the HWAT-ECO for at least 6 hours to charge the battery.
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3
Programming the Controller
Cable type
Use the up/down arrows to select HWAT-Y2 or
HWAT-R2 cable used in your installation. Press Enter.
Voltage
Use the up/down arrows to select 208 V or 240 V
(applied voltage to the cable). Press Enter.
Units
Use the up/down arrows to select English or Metric units. Press Enter.
Ambient temperature
The ambient temperature is the air temperature surrounding the hot water piping where the heating cable is installed. Use the up/down arrow keys to e e o 1 ) o ) e n e
If your design requires that the ambient temperature is significantly different from one location to another, you will need an HWAT-ECO controller for each ambient condition.
Maintain temperature
The maintain temperature setpoint is the water temperature that you set for normal use. Use the up/ down arrow keys to select the temperature.
nVent.com | 29
3
Programming the Controller
e n e pe a e 1 4 ) o e economy temperature, whichever is higher. The
maximum temperature depends on cable type,
voltage and ambient temperature. The programmed maintain temperature will display if you press the
ESC button once the system is in operation.
TABLE 2: MAXIMUM MAINTAIN TEMPERATURE (208-VOLT)
Heating cable
HWAT-Y2
Ambient temperature
60˚F (15˚C) 70˚F (20˚C) 80˚F (25˚C)
1 4 ) 1 ) 1 )
HWAT-R2 14 ) 14 ) 14 )
TABLE 3: MAXIMUM MAINTAIN TEMPERATURE (240-VOLT)
Heating cable
Ambient temperature
60˚F (15˚C) 70˚F (20˚C) 80˚F (25˚C)
HWAT-Y2
HWAT-R2
1
14
4 )
)
1
14 )
) 1
14 )
)
Economy temperature
The economy temperature setpoint is the water
temperature for periods during which hot water is not usually used (at night) or when a lot of hot water is used (peak period). Use the up/down arrows to select
30 | nVent.com
3
Programming the Controller
e e pe a e e n
4 ) an e a maintain temperature.
e pe a e 1
e pe a e e e e e
Default programs
The HWAT-ECO has 9 pre-defined programs. ee ap e e e ne og a o o e information.) Use the up/down arrows to select a
pre-defined program. Press Enter. HWAT-ECO takes a few seconds to copy the pre-defined program to the internal memory. During this time a row of dots will show in the display.
Pipe temperature
This function also ensures that the delivered water temperature is not lower than the desired maintain temperature.
Completing initialization
The controller will start automatically when you finish selecting your Quickstart options. Additional settings are available in the Setup menu for advanced installations. See section 3.3 on page 33 for more information.
Press Enter to start the controller. If you press the
ESC button, you can retrace all menu items to check the settings. After starting the controller the display shows date, time, temperature setting and a “*” to nVent.com | 31
3
Programming the Controller
indicate that the controller is unlocked. If you wish to lock (password protect) the controller, see section
3.3.2.6 for instructions.
Displaying Maintain Temperature Setpoint
After finishing the Quickstart, the display will show the date, time, temperature mode and a star to
indicate that the controller is unlocked.
02-11-2013
Maintain
09:13
While in operating mode, press ESC to view a bar graph that shows the maintain temperature setpoint.
To enter the programming menu, press any other key. The controller will exit the menu automatically after five seconds of key inactivity.
32 | nVent.com
Figure 19: Bar graph
Displaying Pipe Temperature
When the optional pipe temperature sensor is connected, the controller will display date and time as above and alternate between temperature mode and pipe temperature.
3.3
3
Programming the Controller
02-11-2013 pe 11
09:13
*
Advanced Programming
Advanced programming options are also available.
Table 4 and the remainder of this section outline the advanced programming options that include modifying initial settings, setting additional features such as BMS and Network Master, reinitializing the entire controller, or customizing the pre-defined programs.
nVent.com | 33
3
Programming the Controller
TABLE 4: ADVANCED PROGRAMMING MENU
1 Time and
Date
2 Setup
(enter password if Lock is ON)
1 Year
2 Month
3 Day
4 Hour
5 Minutes
1 Main Temp
2 Economy Temp
3 Ambient Temp
4 Power Correction
5 Lock
6 BMS
7 Network Master
8 Reinitialize
9 Short heater
10 LTA
(Low Temp Alarm)
1. Set Status
2. Set Temperature
e a e
4. Set Deadband
11 HTC
(High Tem. Cut Out)
1. Set Status
2. Set Temperature
e a e
4. Set Deadband e e
Select Year
Select Month
Select Day
Select Hour
Select Minutes
“Enter maintain temp. setpoint”
“Enter economy temp. setpoint”
“Enter ambient temp.”
Selectable
Lock/unlock Setup and Timer menus
Select Yes/No
Select Yes/No
Select Yes/No
Select Yes/No
Select Yes/No
Enabled or Disabled
) n
n e
4 1 1 )
Enabled or Disabled a
10-30 Minutes
4 1 1 )
34 | nVent.com
3
Programming the Controller
TABLE 4: ADVANCED PROGRAMMING MENU
3 Timer
(enter password if Lock is ON)
4 Holiday
5 Info
1 Default program
Constant
Apartments a
Prison
o e
Hospital
Nursing home
Hotel
Sports Center
Convalesc. home
2. Edit program
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Edit timer for Monday
Edit timer for Tuesday
Edit timer for Wednesday
Edit timer for Thursday e o a
Edit timer for Saturday
Edit timer for Sunday
On
Off xxDays off
Show firmware version number + Cable type + Sensor temp.
Time and Date
Use the up/down arrows to select the year and press
Enter. Then select and set the month, day, hour and
minutes.
nVent.com |
3
Programming the Controller
Setup
When Lock is on (no star in the lower right corner) enter a password to access the setup menu. The controller locks again after 60 seconds of inactivity.
When Lock is off the following menus are directly
accessible.
1. Maintain temperature
The maintain temperature setpoint is the water temperature that you set for normal use. Use the up/down arrows to select the temperature. The n e pe a e 1 4 ) o e e ono temperature, whichever is higher. The maximum temperature depends on cable type, pipe diameter, insulation thickness and ambient temperature.
2. Economy temperature
The economy temperature setpoint is the water temperature for periods during which hot water is not usually used (at night) or when a lot of hot water is used (peak period). Use the up/down arrows to select the temperature. The minimum temperature
1 4 ) an e a e pe a e e selected maintain temperature. Press Enter.
36 | nVent.com
3. Ambient temperature
The ambient temperature is the air temperature surrounding the pipes where the heating cable is
3
Programming the Controller
installed. Use the up/down arrows to select from
1 ) o ) e n e o on
If your design requires that the ambient temperature is significantly different from one location to another, you will need an HWAT-ECO controller for each ambient condition.
4. Power correction
The power correction factor can be selected to increase or decrease your actual pipe maintain temperature or to adjust for using HWAT heating cables on rigid plastic pipes.
The power correction factor can be adjusted from
0.6 to 1.40, increasing or decreasing the percent time the heating cable is powered during the duty cycle.
o n a a on on g p a p pe e e po e factor at:
HWAT-Y2: 1.20
1
5. Lock (password)
Use the up/down arrows to select Lock On/Off and press Enter. If you select ‘On’, you must enter a
password using the left/right and up/down arrow buttons to select a 4-digit password. Press Enter.
You will need to remember your 4-digit password whenever you wish to unlock the controller for nVent.com | 37
3
Programming the Controller
reprogramming. Once you unlock and reprogram, you will need to relock by entering your password.
If Lock is On, the Setup and Timer menus are protected by the password. After you enter the password, the controller remains unlocked until five minutes of key inactivity or until you select Lock ‘On’ again.
6. Building Management System (BMS)
You can activate the Building Management System option using this menu. When set to “Yes” the controller responds only to the voltage applied to the
e na o o age 4
o o age e een 4 1
ea ng a e
an 4 maintain temperatures are set as indicated in Table
o o age 4 1 po e app e to the heating cable. See "Building Management
System (BMS) (optional)" on page 22 for installation information. If Water heater is ON, it overrules the BMS temperature setting if necessary.
38 | nVent.com
3
Programming the Controller
TabLe 5: BMS VOLTAGE INPUT
Temp °F (°C) HWAT-Y2 HWAT-R2
14 4)
147 (64)
140 (60)
1 1 )
1 )
11 4 )
106 (41)
Off
X
X
X
X
X
X
X
X
X
X
X
X
X
U-BMS/U-GLT
(VOLT)
4
6.4
6
4
4.1
0
7. Network Master
In large installations where more than one
HWAT-ECO controllers are connected to each other, you must select one controller as the Master. This controller should be fully programmed and all slave controllers will use the Master settings.
The master controller sends commands to all slave on o e o e o e a e program is used for all controllers as follows:
Slave controllers on the same phase (max. three on o e ) a e a e a e an way the start-up current of the cable will never occur at the same moment for these controllers (A, B and
C). Slave controllers connected to a different phase will switch at the same time (1, 2 and 3). nVent.com | 39
3
Programming the Controller
After selecting “Master: Yes”, the slave controllers will initialize and show:
:Slave: “x y” x= phase number (1 to 3) y= slave identification (A, B and C)
The master controller is always 1 A, the slave controllers will get their number and identification automatically. Always check afterwards if all controllers have unique id-numbers, if not, check e 4 a e an epea p o e e
8. Reinitialize
To Reinitialize all settings back to the factory settings (except time and date), set the “Reinitialize” menu to “Yes.”
9. Short Heater
This feature allows you to activate a low current alarm:
Yes: Allows low current such as when used as a demonstration, or to control a contactor. In this mode there is no low current alarm.
No: Generates low current alarm when measured current is less that 300 mA.
40 | nVent.com
10. LTA (Low Pipe Temperature Alarm)
When the optional pipe temperature sensor option is installed, the HWAT-ECO controller monitors the temperature of the hot water distribution pipes
3
Programming the Controller
where the sensor is installed and can generate a low pipe temperature alarm.
1. Set Status: Enabled or Disabled
2. Set temperature:
– n )
– Maximum: < Maintain (or Economy)
3. e a e e n e
4. e ea an 4 1 1 )
e a )
11. HTC (High Temperature Cut-Out)
When the optional pipe temperature sensor option is installed, the HWAT-ECO controller monitors the temperature of the hot water distribution pipes where the sensor is installed and a high temperature cut-out can be set.
High Temperature Cut-out: n e po n a a e ea an
)
n e e a 1 )
) e a )
Timer
The Timer feature lets you re-program any of the pre-defined programs to suit your personnel
requirements. Reprogramming is done graphically in
½ hour time blocks. A block can be set to Heat-Up nVent.com | 41
3
Programming the Controller
cycle, Maintain temperature, Economy temperature, or Off. See “Chapter 6, Heat-Up Cycle Graphs” for more information.
Edit pre-defined programs
To edit a program, switch Lock to Off. If password protected, you will need to enter the password to unlock the controller. After you enter the password, the controller remains unlocked until five minutes of key inactivity or the Lock ‘On’ is selected again
Select temperature
Use the up/down arrows to select the temperature:
= Heat-up cycle = Maintain temperature
= Economy temperature = Off
Figure 20: Timer block options
Select time block
Use the left/right arrows to select the time block.
Timer programming example from 00:00 to 08:00:
42 | nVent.com
3
Programming the Controller
..........
00:00 – 00:30: Heat-up cycle
00:30 – 01:00: Heat-up cycle
01:00 – 01:30: Heat-up cycle
02:00 – 02:30: Off
02:30 – 03:00: Off
03:00 – 03:30: Off
03:30 – 04:00: Off
04:00 – 04:30: Off
4 ono
ono
06:30 – 07:00: Maintain
07:00 – 07:30: Maintain
07:30 – 08:00: Maintain
...........
ono
01:30 – 02:00: Heat-up cycle 06:00 – 06:30: Economy
Figure 21: Timer programming example
Heat-Up cycle
The HWAT-ECO can be programmed to power
HWAT-Y2 or HWAT-R2 at full power for any selected number of hours. When hot water is not being used and the pipes are stagnant, the HWAT-ECO can raise the temperature of the water in the stagnant pipes. To determine the amount of time that is required to reach a desired temperature, refer to
“Chapter 6, Heat-Up Cycle Graphs.” You must know the programmed maintain temperature, pipe sizes, system voltage and the type of heating cable to determine the amount of time that is required to reach a desired temperature. If the desired temperature can be reached in a timeframe that is less than when the pipes will be flowing again, the
Heat-Up cycle can be programmed for the number of hours that are required and the desired temperature will be reached. To determine the amount of time nVent.com | 43
3
Programming the Controller
that is required to return back to the maintain temperature after the Heat-Up cycle is complete and the heating cable is off, refer to “Chapter 7,
Cool-Down Graph.”
Holiday
This menu is used to set the controller to Off, timed-off, or to resume your timer program.
On: The controller uses the normal operation the timer program.
Off: The controller will not power the system until you select “Use timer”.
xx Days off: You can select a number of days. The controller automatically returns to timer mode when the selected number of days have passed.
Info
The display shows the firmware version number, selected cable type and the current sensor temperature. Press Enter twice to update the sensor temperature on the display.
44 | nVent.com
4
Error/Alarms and
Troubleshooting
Please ensure that the unit is correctly connected to the power supply and the heating cable is connected to the HWAT-ECO unit.
Error code
Definitions Cause/reasons
Error 1:
Error 2:
Error 3:
Remedy
Internal temperature alarm;
Temperature is too high. (> 65°C)
Pipe Sensor failure
(Only when temperature alarm
“enabled” selected)
• Sensor or sensor cable defect
• Low temp alarm or
High temperature cut-out selected and sensor is not installed.
Network failure
Two or more
HWAT-ECO’s are set as
Master
Turn off power and allow the controller to cool and then re-energize. The controller will lock out after three
occurrences. If this does not restore the controller, replace the HWAT-ECO.
Connect sensor to HWAT-ECO or turn off temperature alarm.
Check sensor connections; replace sensor, check temperature sensor mounting
Reinitialize MASTER
(see "Setup" on page 36) nVent.com | 45
4
Error/Alarms and
Troubleshooting
Error code
Definitions Cause/reasons
Error 4:
Error 5:
Error 6:
Error 7:
Internal Error
Remedy
Controller needs to be replaced.
Contact nVent representative
No/Low current alarm Ensure that the heating circuit is connected to power output of the HWAT-ECO.
If controlling a contactor, ensure that the Short Heater Alarm is enabled.
Configuration Error
Pipe temperature too
high
(Only when HTC is enabled)
• Boiler temperature is too high.
• Pipe temperature too hot
Refer to "Short Heater" menu.
• If heating cable is longer that 15 ft. (4.5 m) then, Short heater = No
• If heating cable is shorter than 15 ft. (4.5 m) then, Short heater = Yes
• Verify High Temperature
Cut-out (HTC) is set correctly.
• Correct boiler or mixing valve setting.
• Verify HWAT-ECO programming.
• Verify that pipe insulation schedule is correct.
46 | nVent.com
4
Error/Alarms and
Troubleshooting
Error code
Definitions Cause/reasons
Error 8:
Error 9:
Remedy
Time is lost
Battery is drained due to not being powered for a long time.
Pipe temperature is too low
(Only when temperature alarm “yes” selected)
Pipe temperature too low
Input time again (will be asked by the unit when a button is pressed)
• Correct boiler/mixing valve temperature setting
• Ensure that the sensor is tight to pipe and insulated.
• Verify power is connected to heating cable.
• Confirm Low Temperature
Alarm (LTA) setting
Confirm HWAT-ECO settings
Confirm insulation schedule nVent.com | 47
4
Error/Alarms and
Troubleshooting
Indications/Trouble shooting Cause/reasons
Water temperature too low
Too low water temperature
• Boiler temperature is too low
• Cold water entering system
• Heater used is
different type than entered in program.
• Entered value of ambient temperature is too high.
• Insulation thickness is different than standard thickness.
Remedy
• Check boiler
temperature and timer program
• Mixing valves and janitor sinks may be allowing cold water to cross over to the hot water side.
• Change heater type in HWAT-ECO (can only be done in quick install "Setup" on page 36
- Reinitialize)
• Change value of ambient temperature
• Adjust power
correction factor if possible (see "Timer" on page 41)
• Change insulation to match required schedule in HWAT installation manual.
48 | nVent.com
4
Error/Alarms and
Troubleshooting
Indications/Trouble shooting Cause/reasons
Water temperature too high
Too high water temperature
• Heater used is
different type than entered in program.
• Insulation thickness is different than standard thickness.
• Entered value of ambient temperature is too low
No display
Can’t access
programming mode
Loss of power
Controller is password-protected
Remedy
• Change heater type in HWAT-ECO (can only be done in quick install "Setup" on page 36
- Reinitialize)
• Adjust power
correction factor if possible (see "Timer" on page 41)
• Change value of ambient temperature
Restore power
Enter your 4-digit password. If you
forgot your password, enter the backup password: 6922 to unlock the controller nVent.com | 49
5
Pre-Defined Programs
= Heat-up cycle = Maintain temperature
I-0
Monday-Sunday
Heat-up
Maintain
Economy
= Economy temperature
Constant
= Off
Off
00
I-1
Monday-Friday
Heat-up
Maintain
Economy
02 04 06 08 10
12 14
Apartments
16
18 20 22
24
Off
00
Heat-up
Maintain
Saturday-Sunday Economy
02 04 06 08 10 12 14 16 18 20 22 24
Off
00
I-2
Monday-Sunday
Heat-up
Maintain
Economy
02 04 06 08 10
12 14
Family home
16
18 20 22
24
Off
00
I-3
Heat-up
Maintain
Monday-Sunday Economy
02 04 06 08 10 12
Prison
14 16
18
20 22 24
Off
00 02 04 06 08 10 12 14 16 18 20 22 24
50 | nVent.com
= Heat-up cycle = Maintain temperature
I-4
Monday-Sunday
Heat-up
Maintain
Economy
= Economy temperature
Hospital
= Off
Off
00
I-5
Monday-Sunday
Heat-up
Maintain
Economy
02 04 06 08 10
12 14
Nursing home
16
18 20 22
24
Off
00
I-6
Monday-Sunday
Heat-up
Maintain
Economy
02 04 06 08 10 12
Hotel
14 16 18 20 22 24
Off
00
I-7
Monday-Sunday
Heat-up
Maintain
Economy
02 04 06 08 10
12 14
Sports center
16
18 20 22
24
Off
00
I-8
Monday-Sunday
Heat-up
Maintain
Economy
02 04 06 08 10 12 14 16
Convalescent home
18
20 22 24
Off
00 02 04 06 08 10 12 14 16 18 20 22 24
= Heat-up cycle = Maintain temperature
I-0
Monday-Sunday
Heat-up
Maintain
Economy
= Economy temperature
Constant
= Off
Off
00
I-1
Monday-Friday
Heat-up
Maintain
Economy
02 04 06 08 10
12 14
Apartments
16
18 20 22
24
Off
00
Saturday-Sunday
Heat-up
Maintain
Economy
02 04 06 08 10 12 14 16 18 20 22 24
Off
00
I-2
Monday-Sunday
Heat-up
Maintain
Economy
02 04 06 08 10
12 14
Family home
16
18 20 22
24
Off
00
I-3
Monday-Sunday
Heat-up
Maintain
Economy
02 04 06 08 10 12
Prison
14 16
18
20 22 24
Off
00 02 04 06 08 10 12 14 16 18 20 22 24
5
Pre-Defined Programs
= Heat-up cycle = Maintain temperature
I-4
Monday-Sunday
Heat-up
Maintain
Economy
= Economy temperature
Hospital
= Off
Off
00
I-5
Monday-Sunday
Heat-up
Maintain
Economy
02 04 06 08 10
12 14
Nursing home
16
18 20 22
24
Off
00
I-6
Monday-Sunday
Heat-up
Maintain
Economy
02 04 06 08 10 12
Hotel
14 16 18 20 22 24
Off
00
I-7
Monday-Sunday
Heat-up
Maintain
Economy
02 04 06 08 10
12 14
Sports center
16
18 20 22
24
Off
00
I-8
Monday-Sunday
Heat-up
Maintain
Economy
02 04 06 08 10 12 14 16
Convalescent home
18
20 22 24
Off
00 02 04 06 08 10 12 14 16 18 20 22 24 nVent.com | 51
6
Heat-Up Cycle Graphs
To calculate heat-up and cooldown times when heat cycle is used.
125
(52)
Heat-Up HWAT-Y2
120
(49)
115
(46)
110
(43)
105
(41)
0
208V
1/2-inch pipe
1-inch pipe
2-inch pipe
2
70°F (21°C) ambient
4 6 8 10 12 14 16 18
Time (hours)
20 22 24
125
(52)
120
(49)
115
(46)
110
(43)
105
(41)
0
240V
1/2-inch pipe
1-inch pipe
2-inch pipe
2
70°F (21°C) ambient
4 6 8 10 12 14 16 18
Time (hours)
20 22 24
52 | nVent.com
6
Heat-Up Cycle Graphs
150
(66)
Heat-Up HWAT-R2
140
(60)
130
(54)
120
(49)
110
(43)
105
(41)
0
208V
1/2-inch pipe
1-inch pipe
2-inch pipe
70°F (21°C) ambient
2 4 6 8 10 12 14 16 18
Time (hours)
20 22 24
150
(66)
140
(60)
130
(54)
120
(49)
110
(43)
105
(41)
0
240V
1/2-inch pipe
1-inch pipe
2-inch pipe
70°F (21°C) ambient
2 4 6 8 10 12 14 16 18
Time (hours)
20 22 24 nVent.com | 53
7
Cool-Down Graph
These cool down curves represent when the heating cable is turned off.
Cool-Down
150
(66)
70°F (21°C) ambient
1/2-inch pipe
145
(63)
1-inch pipe
2-inch pipe
140
(60)
125
(52)
120
(49)
135
(57)
130
(54)
115
(46)
110
(43)
105
(40)
0 1 2 3 4 5 6 7
Time (hours)
8 9 10 11 12
54 | nVent.com
North America
Tel. +1.800.545.6258
Fax +1.800.527.5703
Asia Pacific
Tel. +86.21.2412.1688
Fax +86.21.5426.3167
Europe, Middle East, Africa
Tel. +32.16.213.511
Fax +32.16.213.604
Latin America
Tel. +1.713.868.4800
Fax +1.713.868.2333
nVent.com
©2019 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-H57340-HWATECOcontroller-EN-1901

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