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

R/O Shops, 9-19 Manor Green Road, Epsom, Surrey KT19 8RA

Jason Hooke
SPECIFICATION 3743-1
Xcel GXV Underfloor Heat Bank Thermal Store

10/05/01
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  
Danfoss VMV20 UF Control Valve  
28mm Underfloor Primaries  
Fitted Primary Pumps  
All fitted controls are wired  
Thermostatic Blending Valve 22mm 
Backup Immersion Heater  
Cased  

 

Unit Code

 XC-210-3743-1XC-250-3743-1

Capacity [litres]

 210250

Base Diameter [mm]

 450450

Overall Diameter [mm]

 530530

Height [mm]

 15501800

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 Incaloy with Stat
16  Cold Mains In, 22mm
17  Hot Mains Out, 22mm
18  Drain Cock
19  Flow From Boiler 22mm 
20  Return to Boiler 22mm
23  Flow to Heating 28mm
24  Return from Heating Circuit
26  Primary Pump - Grundfos UPS 15/50
27  Boiler Pump - Grundfos UPS 15/60
38  Cylinder Thermostat (with Immersion Pocket)
41  Primary Blending Valve
42  Wiring Centre
76  Danfoss VMV20 Valve with RAVK Sensor

 
This unit is designed to provide the best all round performance when used in conjunction with a relatively large underfloor heating installation and a combination boiler. Mains pressure hot water is provided at increased rates.
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 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.
Heat Bank Thermal Store System
Xcel Cylinder
As per specification 3743-1, 10-05-01
Unit IDSizeNet Price
XC-210-3743-1210 litres, 450 x 1550mm£ 995.00
XC-250-3743-1250 litres, 450 x 1800mm£ 1085.00

Prices do not include VAT or Delivery.
Ready for collection 3-4 weeks from receipt of order.
Terms: 30 days from date of collection / dispatch. (account permitting)
Credit Cards accepted.