Elson CBi Installation & Servicing Instructions Manual

Heat interface unit

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CB Heat Interface Unit Manual

Wall Mounted Heat Interface Units for

Community Heating Systems

Installation & Servicing Instructions

IMPORTANT

Please read & understand these instructions along with the instructions for the heating

controller, unvented cylinder / thermal store before commencing installation.

Please leave this manual with the user for future reference.

Table of Contents

Summary of Contents for Elson CBi

Page 1 CB Heat Interface Unit Manual Wall Mounted Heat Interface Units for Community Heating Systems Installation & Servicing Instructions IMPORTANT Please read & understand these instructions along with the instructions for the heating controller, unvented cylinder / thermal store before commencing installation. Please leave this manual with the user for future reference.
Page 2: Table Of Contents
CONTENTS INTRODUCTION..............3 GENERAL REQUIREMENTS..........3 PRODUCT SPECIFICATION..........3 PRODUCT FEATURES............4 DIMENSIONS AND WEIGHT..........12 INSTALLATION ..............13 WIRING................16 WIRING DIAGRAMS............17 HYDRAULIC DIAGRAMS..........21 HYDRAULIC DIAGRAMS LEGEND........26 CONTROL STRATEGY............27 MAJOR COMPONENTS...........29 COMMISSIONING.............36 SERVICE................37 FAULT FINDING..............38 SPARES................39 SALES AND SUPPORT.............44 Page 2...
Page 3: Introduction
WITH THE APPLIANCE. CLEANING AND USER Where the cylinder / thermal store is supplied by a third party, MAINTENANCE SHALL NOT BE MADE BY these components will be deemed outside the Elson scope of CHILDREN WITHOUT SUPERVISION. supply / responsibility.
Page 4: Product Features
PRODUCT FEATURES Fig 1 Product Features and Components for the CB-1Z (Single Heating Zone) Page 4...
Page 5 (21) Common central heating return drain valve (22) Position of 1/2”bsp heat meter ﬂ ow sensor pocket (supplied by heat meter company) (23) Elson central heating system manifold (24) Pump isolation unions Central heating pump (26) HWS primary 2 port zone valve (27) HWS primary ﬂ...
Page 6 PRODUCT FEATURES Fig 2 Product Features and Components for the CB-1Z-DC (Single Heating Zone with District Control Valve) Page 6...
Page 7 Position of 1/2”bsp heat meter ﬂ ow sensor pocket (supplied by heat meter company) (27) Test point (blue) to measure the pressure drop across the district control valve (28) Elson central heating system manifold (29) Pump isolation unions (30) Central heating pump...
Page 8 PRODUCT FEATURES Fig 3 Product Features and Components for the CB-2Z (Two Heating Zones) Page 8...
Page 9 Apartment heating 2 port zone valves (21) Common central heating return drain valve (22) Position of 1/2”bsp heat meter ﬂ ow sensor pocket (supplied by heat meter company) (23) Elson central heating system manifold (24) Pump isolation unions (25) Central heating pump (26)
Page 10 PRODUCT FEATURES Fig 4 Product Features and Components for the CB-2Z-DC (Two Heating Zones with District Control Valve) Page 10...
Page 11 Position of 1/2”bsp heat meter ﬂ ow sensor pocket (supplied by heat meter company) (27) Test point (blue) to measure the pressure drop across the district control valve (28) Elson central heating system manifold (29) Pump isolation unions (30) Central heating pump...
Page 12: Dimensions And Weight
DIMENSIONS AND WEIGHT Fig 5 CB-1Z and CB-1Z-DC Heat Interface Unit - 1 Heating Zone Community (district) heating ﬂ ow - 3/4”bsp male Community (district) heating return - 3/4”bsp male HWS primary return connection - 3/4”bsp male Common central heating return connection - 3/4”bsp male Central heating ﬂ...
Page 13: Installation
Note: CB-2Z-DC detailed. Please note that the clearance dimension detailed above are for guidance. In installations where available space to site the unit is less than these recommendations please seek advice from Elson Technical on 0844 335 8819. Page 13...
Page 14 INSTALLATION Wall Fixing Fig 9. First ﬁ x rail mounting details The CB unit can be supplied with a ﬁ rst ﬁ x rail for ease of installation. The rail allows the plumber to pipe up and test the pipework to and from the heat interface unit without the need to have the heat interface unit on site.
Page 15 Ensure the installation is earth bonded in accordance with Pipework Insulation: BS EN 7671:2008. Elson system packages are supplied without pipe insulation to allow the installer to ensure all joints are still sound after installation. It is recommended that these pipes are insulated.
Page 16: Wiring
WIRING Wiring The CB heat interface unit is ﬁ tted with a pre-wired wiring centre for ease of installation. There is an additional entry point available on the right hand side of the wiring centre for the mains cable and the cylinder / thermal store thermostat cable.
Page 17: Wiring Diagrams
WIRING DIAGRAM Page 17...
Page 18 WIRING DIAGRAM Page 18...
Page 19 WIRING DIAGRAM Page 19...
Page 20 WIRING DIAGRAM Page 20...
Page 21: Hydraulic Diagrams
HYDRAULIC DIAGRAMS Page 21...
Page 22 HYDRAULIC DIAGRAMS Page 22...
Page 23 HYDRAULIC DIAGRAMS Page 23...
Page 24 HYDRAULIC DIAGRAMS Page 24...
Page 25 HYDRAULIC DIAGRAMS Page 25...
Page 26: Hydraulic Diagrams Legend
HYDRAULIC DIAGRAMS LEGEND Page 26...
Page 27: Control Strategy
CONTROL STRATEGY Fig 25. Controls Logic CB-1Z and CB-1Z-DC heat interface unit with unvented cylinder and 1 heating zone 230V power supply via switched fused spur. 230V TP 9000 Controller No HWS No HTG Time Zone Timed Event Time Zone Timed Event 230V 230V...
Page 28 CONTROL STRATEGY Fig 27. Controls Logic CB-2Z and CB-2Z-DC heat interface unit with unvented cylinder and 2 heating zones 230V power supply via switched fused spur. 230V 230V TP 5000M Programmable Room TP 9000 Controller thermostat HTG zone 1 No HWS No HTG Z1 Timed Event Timed Event...
Page 29: Major Components
MAJOR COMPONENTS - DISTRICT CONTROL VALVE Frese Optima Compact (on CB-1Z-DC and CB-2Z-DC models only) Application • The Frese OPTIMA Compact pressure independent balancing & control valve (PIBCV) in your CB unit provides on/off control with full authority regardless of any ﬂ...
Page 30 MAJOR COMPONENTS - DISTRICT CONTROL VALVE Frese Optima Compact Fig 32. Flow Characteristics Flow Kv (m min. Δp kPa 0,167 18,5 0,139 17,6 0,111 0,083 16,6 0,056 15,5 0,028 14,9 Pre-set DISTRICT FLOW VERIFICATION Fig 33. Flow Settings The district heating ﬂ ow rate can be veriﬁ ed with a suitable manometer using the test points as detailed below in Fig 34 and cross referring the results with Pre-set...
Page 31 Larger systems will need to be set to speed three and small systems on speed one or two. Pump speed switch Detail A Automatic Bypass The Elson manifold is equipped with an integral automatic bypass to protect the pump. Page 31...
Page 32 MAJOR COMPONENTS - AUTOMATIC AIR VENT Technical data Robocal AAV The Robocal automatic air vent will purge any air that is Materials: left in the system after commissioning. Body and cover: Brass EN 12165 CW617N Float: Obturator: silicone rubber The AAV is ﬁ tted into a shut off valve for ease of Spring: stainless steel maintenance.
Page 33 MAJOR COMPONENTS - SAFETY VALVE Safety Valve Fig 40. Sealed system safety valve The CB heat interface units are supplied with a sealed system safety valve set to lift at 3.0 bar g. The safety valve should be checked periodically to ensure that the valve is operational.
Page 34 MAJOR COMPONENTS - PLATE HEAT EXCHANGER Brazed plate heat exchanger Fig 43. Position of plate heat exchanger The brazed plate heat exchanger supplied within the CB heat interface unit provides a break between the primary (community / district) heating circuit and the secondary (apartment) central heating circuit.
Page 35 MAJOR COMPONENTS - EXPANSION VESSEL Heating expansion vessel Fig 45. Position of the expansion vessel The heating expansion vessel is sized to accommodate the expanded water in the apartment’s central heating system. Speciﬁ cation: Volume: 8 litres Gas charge: 1.0 bar g Maximum working pressure: 3.0 bar g Maximum working temperature: 99 deg C...
Page 36: Commissioning
COMMISSIONING Filling the system 1) Ensure the apartment central heating system is switched The valve is fully open when the actuator is unclipped. If the off at the mains isolation switch. project requires the ﬂ ow rate to each apartment to be 2) Isolate the CB HIU from the district heating system using individually set refer to Fig.
Page 37: Service
SERVICE Check and clean strainer ﬁ lter Check the inhibitor content in the system The strainer ﬁ lter is accessed through the strainer service 1) Open the central heating drain cock to take a small sample plug as detailed in Fig 49. of the water from the apartment central heating system.
Page 38: Fault Finding
FAULT FINDING Fault Cause Action No Heating Programmer incorrectly set, faulty, or wired Check programmer settings, wiring, and is incorrectly. operating correctly. Room thermostat set wrong, faulty, or wired Check room thermostat settings, wiring, and is incorrectly. operating correctly. Heating zone valve seized, faulty, or wired Check zone valve wiring, is operating correctly incorrectly.
Page 39: Spares
SPARES Fig 50. Component Spare Parts CB-1Z, CB-1Z-DC, CB-2Z and CB-2Z-DC CB-1Z-DC detailed Description Part Description Part Number Number Pump valve 40120010 Washer - EPDM - 3/8”bsp 24100039 Pump 24400021 Actuator - on/off - 230V 24500024 Manifold 90000002 Strainer - 3/4” bsp male/male 24500020 Automatic air vent - 3/8”...
Page 40 SPARES Fig 51. Prefabricated Pipe Spare Parts - CB-1Z Description Part Description Part Number Number Pipe - Safety valve discharge 24200016 Pipe - Manifold to heat meter 24200134 Pipe - Expansion vessel connection 24200146 Pipe - Heat meter stool piece 24200133 Pipe - AAV and expansion vessel 24200137...
Page 41 SPARES Fig 52. Prefabricated Pipe Spare Parts - CB-2Z Description Part Description Part Number Number Pipe - Safety valve discharge 24200016 Pipe - Heat meter stool piece 24200133 Pipe - Expansion vessel connection 24200146 Pipe - Manifold to heat meter 24200134 Pipe - AAV and expansion vessel 24200137...
Page 42 SPARES Fig 53. Prefabricated Pipe Spare Parts - CB-1Z-DC Description Part Description Part Number Number Pipe - Safety valve discharge 24200016 Pipe - Plate heat exchanger to district valve 24200142 Pipe - Expansion vessel connection 24200146 Pipe - Heat meter stool piece 24200133 Pipe - AAV and expansion vessel 24200137...
Page 43 SPARES Fig 54. Prefabricated Pipe Spare Parts - CB-2Z-DC Description Part Description Part Number Number Pipe - Safety valve discharge 24200016 Pipe - Plate heat exchanger to district valve 24200142 Pipe - Expansion vessel connection 24200146 Pipe - Heat meter stool piece 24200133 Pipe - AAV and expansion vessel 24200137...
Page 44: Sales And Support
The guarantee is transferable. This guarantee does not affect your statutory rights. Policy Statement The policy of Elson is one of continuous product development and, as such, we reserve the right to change speciﬁ cations without notice.

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