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 4091-1 Mr. Stephen Foster
Xcel Heat Bank Thermal Store

07/08/01
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  
Directly Pumped Heating Circuit  
RX1 Programmable Room Thermostat  
Fitted Primary Pump, 5m head  
All fitted controls are wired  
Thermostatic Blending Valve 22mm  
Blanked upper immersion heater boss  
Spare 1'' Connections for Aga  
Cased  

 

Unit Code

 XC-150-4091-1XC-180-4091-1XC-210-4091-1

Capacity [litres]

 150180210

Base Diameter [mm]

 450450450

Overall Diameter [mm]

 530530530

Height [mm]

 120013801550

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
16  Cold Mains In, 22mm
17  Hot Mains Out, 22mm
18  Drain Cock
19  Flow From Boiler
20  Return to Boiler
23  Flow to Heating Circuit
24  Return from Heating Circuit
27  Boiler Pump UPS 15/60
28  Heating Circuit Pump UPS 15/60
33  Danfoss Radio Receiver
38  Cylinder Thermostat (with Immersion Pocket)
39  White Coated Steel Casing
41  Primary Blending Valve
42  Wiring Centre with Mechanical Timeclock
58  Blanked Immersion Heater Boss
64  Boss, 1'' FI, for connection to Aga 
72  Overheat Thermostat (drives heating pump 28)

 
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 on 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.