DEDICATED PRESSURE SYSTEMS LTD.

Telephone 01372 803 675
 Fax 01372 803 678
 Email dps@heatweb.com
 Internet http://www.heatweb.com

The Institute of Plumbing

 9-19 Manor Green Road, Epsom, Surrey KT19 8RA

Specification 4078-1 Mr. Graham Johnson
Xcel Heat Bank Thermal Store - Multiple Fuel System

08/08/01
Copies / revised specifications
can be obtained via fax / email
Heat Bank Thermal Store System  
Xcel Cylinder  
28 Plate Heat Exchanger (45+ ltr/min)  
Directly heated from remote source  
40mm Foam Insulation  
GX-Plan primary controls  
Underfloor Primaries  
RX1 Programmable Room Thermostat  
Fitted Primary Pump, 5m head  
All fitted controls are wired  
Thermostatic Blending Valve 22mm  
Additional 6m Finned Coil for Solar
Connections for Solid Fuel Boiler  
Backup Immersion Heater  
Cased  

 

Unit Code

 XC-180-4078-1XC-210-4078-1XC-250-4078-1

Capacity [litres]

 180210250

Base Diameter [mm]

 450450450

Overall Diameter [mm]

 530530530

Height [mm]

 138015501800

1   Remote Feed and Expansion Tank
2   Plate Heat Exchanger
3   Heat Exchanger Pump
4   Flow Switch
5   Thermostatic Blending Valve, Mixcall III
8   Vent
11  Y-Pattern Strainer (supplied loose)
13  Cold Feed / Expansion
14  Immersion Heater 3kW Low Noise with 2x Stats
16  Cold Mains In, 22mm
17  Hot Mains Out, 22mm
18  Drain Cock
19  Flow From Boiler
20  Return to Boiler
23  Flow to Underfloor Heating
24  Return from Underfloor Heating
27  Boiler / Underfloor Pump UPS 15/60
33  Danfoss Radio Receiver
34  Danfoss Programmable Radio Room Thermostat
38  Cylinder Thermostat (with Immersion Pocket)
39  White Coated Steel Casing
41  Primary / Underfloor Blending Valve
44  Flow to Lower Coil, 22mm
45  Return from Lower Coil, 22mm
64  Boss, 1'' FI, for connection to Solid Fuel Boiler
72  Manual Reset Overheat Thermostat
73  Sensor Points

 
The GXV Xcel a superb all-round performance system, originally designed as a compact, high output hot water and heating system for council properties. To obtain 100% useful input from the boiler, the store is heated directly by the boiler - no coils. A feed and expansion tank must be fitted above the highest point in the primary system. The main advantages of the system are...
No Motorised Valves for either hot water or heating - more reliable & easier to service.
Very rapid recovery of store - hot water in under 3 minutes from cold.
Large volumes of hot water from a small store.
Maintains condensing boilers in condensing mode. 
Ability to bring central heating up to temperature extremely quickly (store recovered).
Store acts as an ideal air separator.

The DanfossTP5E RF room stat communicates with the RX1 receiver (fitted and wired to the Heat Bank Thermal Store) using a digital radio signal. The room stat runs for two years of two standard AA batteries, requires absolutely no wiring, and can be easy positioned (or re-positioned) to suit. Another huge benefit, is the ability of the room stat to heat the property to different temperatures, at different times. This allows large energy savings to be made, while increasing comfort levels.

 

The unit is fitted with a Mixcall III Thermostatic Blending Valve, to control the hot water temperature, and prevent scalding.  The graph shows the pressure drop across the valve for various hot water flow rates.

The Valve is adjustable from 27°C to 67°C, and has a lockable head.

The unit is fitted with two heat exchangers, and is capable of delivering 45 litres/minute @45°C (80°C storage).
A Mains Water Isolating Lever Valve must be fitted within the cylinder cupboard, in clear view and easily accessible. A Strainer (supplied loose) must also be fitted, down stream of the isolating valve, to protect the flow switch [4].
It is advised that the mains water is tested for hardness. In areas of hard water, we advise the use of a scale inhibitor.
It is important that SENTINEL X100 Inhibitor is used to protect the Heat Bank Thermal Store.  Use 1 litre per 100 litres of stored water. A suitable anti-freeze, such as X500, should also be added when there is a chance that the unit will be left filled and unheated in freezing conditions.