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rada DRV40 User Manual
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63
Stop Valve
Full Bore Isolating Valve
Pressure Reducing Valve
Shower
Thermometer
Cold Water
Hot Water
Mixed Water
Check Valve
Recirculation Pump
Key
Strainer / Filter
Needle Valve
Flow indicator
Safety Valve
Water
Heater
Problem:
“Constant difference between blend circuit temperature reading and
DRV40 temperature display
...”
Stop Valve
Full Bore Isolating Valve
Pressure Reducing Valve
Shower
Thermometer
Cold Water
Hot Water
Mixed Water
Check Valve
Recirculation Pump
Key
Strainer / Filter
Needle Valve
Flow indicator
Safety Valve
W
ater
Heater
Readings are not
equal after outlet
temperature has
stabilized
Check outlet thermistor
T
urn power off for 10 seconds and restart.
If
the
error
persists,
check
the
thermistor
connections or replace the thermistors.
Blend circuit thermometer
Check or replace.
62
64
Table of Contents
Drv40 Digital Recirculation Valve
2
Default Chapter
2
Table of Contents
2
Safety: Warnings
4
Advice
4
Introduction
5
Description
5
Pack Contents
6
Dimensions
7
Specification
8
Default Settings
9
Installation
10
General
10
Recirculation Circuit - Plumbing Schematic
12
Commissioning
15
Operation
16
Temperature Adjust Using Laptop or PC
16
COM Port
17
DRV Information
19
Temperatures
20
Setpoints
21
Setpoints - Explained
23
Alerts - Explained
24
Preset Display Alerts
26
Thermal Disinfection
27
Disinfection Step by Step - 1
33
Disinfection Step by Step - 2
34
Options
35
Alert Messages
36
Error Messages
36
Connectivity
37
Modbus
37
System Performance
38
Pump Capacity
38
System Safety Measures
38
Maintenance and Spare Parts
39
Batteries
39
Disassembly
40
Electronics Module
41
PCB Connections
44
Drv
45
Valve Calibration
53
Fault Diagnosis
55
DRV40 Display Errors
56
Blend Temperature Rises When System Is in Zero Demand
58
Common Faults
58
Outlet Temperature Fluctuates more than ± 2°C
60
LCD Display Shows any of the Following
61
Constant Difference between Blend Circuit Temperature Reading and DRV40 Temperature Display
63
Unable to Adjust Outlet Temperature
64
No Display
66
No Display or no Control
66
Cannot Read the LCD Display
67
High Pitched Noise from DRV40
68
Water Leaking from DRV40
69
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rada DRV40 Specifications
General
Brand
rada
Model
DRV40
Category
Control Unit
Language
English
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