Technical data

5 GENERAL Manual No. 405/0101
2. GENERAL - PAGE 5
2.1 INTRODUCTION
These fanned draught room-sealed wall mounted boilers are for use on natural gas only.
The Ultra Dv boilers are range rated at the following outputs:
Ultra Dv 30: 5.9 to 8.8 kW (20 000 to 30 000 Btu/h) Ultra Dv 40: 8.8 to 11.7 kW (30 000 to 40 000 Btu/h)
Ultra Dv 50: 11.7 to 14.7 kW (40 000 to 50 000 Btu/h) Ultra Dv 60: 14.7 to 17.6 kW (50 000 to 60 000 Btu/h)
Ultra Dv 80: 17.6 to 23.4 kW (60 000 to 80 000 Btu/h)
All models are factory set to the maximum output.
The boilers are designed for use on sealed water systems only, with an indirect hot water cylinder.
THEY MUST NOT BE CONNECTED TO A DIRECT CYLINDER.
2.2 REGULATORY REQUIREMENTS
The boiler must be installed in accordance with: The Gas Safety (Installation and Use) Regulations 1990 and the current
issue of: the Building Regulations, Building Standards (Scotland) Regulations, Local Building Regulations, Model and local
Water Undertaking Bye-laws, IEE Wiring Regulations and Health & Safety Document No. 635 "The Electrician At Work
Regulations 1989".
Detailed recommendations are stated in the following British Standards: BS6891:1988, BS6798:1987, BS5546:1990,
BS5440:1:1990, BS5440:2:1989 and BS5449:1990.
Note: Gas Safety (Installation and Use) Regulations 1990: It is the law that all gas appliances are installed by competent
persons, in accordance with the above regulations. Failure to install appliances correctly could lead to prosecution. It is in
your own interest, and that of safety to ensure that the law is complied with.
2.3 DELIVERY & KITS AVAILABLE
The unit is delivered in two packages (1) the uncased boiler with casing panels and (2) the flue/terminal assembly.
A 1 m flue extension kit is available (the total flue length must not exceed 3 m).
An integral programmer kit is also available to fit within the boiler casing.
A Vertex Flue kit is available which allows the flue to exit vertically from the boiler (maximum length is 4 m).
A vertical balanced flue kit is available which allows the flue to exit vertically from the boiler (maximum length 3.15m).
A fit from the inside flue kit is available which allows the flue/terminal assembly to be fitted from inside the building.
Note: Read any kit instructions before installing the boiler.
2.4 GAS SUPPLY
The natural gas requirements are as follows:
Ultra Dv 30: 1.1 m³/h Ultra Dv 40: 1.4 m³/h
Ultra Dv 50: 1.8 m³/h Ultra Dv 60: 2.1 m³/h Ultra Dv 80: 2.8 m³/h
The meter and supply pipes must be capable of delivering this quantity of gas in addition to the demand from any other
appliances in the house.
The complete installation must be tested for gas soundness and purged as described in BS6891.
2.5 ELECTRICITY SUPPLY
240V ~ 50Hz via a fused double pole switch with a contact separation of at least 3 mm in both poles adjacent to the boiler.
There must be only one common isolator for the boiler and its control system and it must provide complete electrical
isolation.
Fuse the supply at 3 A. The minimum requirement for the power supply cable is that it should be a PVC sheathed cord at
least 0.75 mm² (24 x 0.2 mm) (code designation HO5 VV-F or HO5 VVH2-F) as specified in table 16 of BS6500:1984.
All wiring external to the boiler shall comply with the latest IEE Wiring Regulations, and any local regulations which apply.
WARNING: THIS APPLIANCE MUST BE EARTHED.