Operating Instructions and Installation Instructions

ULTRAMAX PB 65 - 120
6 L290 ©MHS Boilers 13/12/2010
The following Codes of Practice are also applicable: -
BS 5449:1990 Specification for forced circulation hot water central heating systems for domestic premises.
BS 6644:2005 Specification for gas fired hot water boilers of rated inputs between 70kW (net) and
1.8MW(net) (2
nd
and 3
rd
family gases).
BS 6880:1988 Code of Practice for low temperature hot water heating systems of output greater than 45kW.
Parts 1,2 & 3.
BS 6891:1988 Specification for installation of low-pressure gas pipework of up to 28mm (R1) in domestic
premises (2
nd
family gases).
BS 7593:2006 Code of Practice for treatment of water in domestic hot water central heating systems.
BS 7671:1992 Requirements for electrical installations. IEE Wiring Regulations. Seventeenth Edition
CISBE Guide reference sections B7, B11 and B13.
CP342 Part 2: 1974 Code of Practice for centralized hot water supply.
IGE/UP/1 or 1A Gas Tightness Testing & Purging of Commercial Industrial Gas Installations
IGE/UP/2 Gas installation pipework, boosters and compressors on Industrial and Commercial premises.
IGE/UP/4 Commissioning of gas fired plant on industrial and commercial premises.
IG/UP/10 edition 3 Installation of gas appliances in Industrial and Commercial premises.
Part 1: Flued appliances.
1.3 Hot Water Quality
Composition and quality of the system water directly affects the performance of the entire system and the
longevity of the boiler.
For the initial filling and subsequent refilling of the system, under normal circumstances, regular tap water with
a pH value between 7 and 8 can be used unless the water is highly corrosive (chloride content > 150 mg/l) or
very hard (<14° dH, hardness level IV). A tap water analysis can be requested from the local water utility
company. If the specific system volume is greater than 20 litre/kW of heating power (for example through
installation of a heating water buffer reservoir) the maximum permissible introduction of calcium via fill and
replacement water must be determined according to the calculations specified in VDI Guidelines 2035.
Softening of the fill water may have to be performed if necessary.
1.4 Unknown Water Quality and Exchanger Systems
Quite frequently, water contains materials and additives, which affect function and longevity of the Heat
exchanger. Therefore, either
Prior to exchanging the equipment, heat up the old system and drain completely afterwards.
OR
After exchanging the equipment, rinse the heating system carefully.
1.5 Existing System
For old systems, floor heating systems and problematic system water, MHS Boilers recommends the
installation of a plate heat exchanger to segregate the primary and secondary systems.
1.6 Scope of Delivery
Ultramax PB condensing boiler with switch panel, including exterior sensor with weather-regulated
heating control for 1 heating circuit and hot water conditioning
Documentation.
Criterion
Permissible
Value
Effect upon Deviation
pH
7-8
Risk of corrosion for boiler components and heating system
Hardness
<14 dH
- increased calcium deposits
- reduced longevity of boiler
Chloride
content
<150 mg/l
Corrosion of alloy materials