IDEAL INDUSTRIES HE18 Terminal, AIR Supply, Water Circulation System, Boiler Control Interlocks

GENERAL

6.The air inlet/products outlet duct and the terminal of the boiler MUST NOT be closer than 25mm (1") to combustible material. Detailed recommendations on the protection of combustible material are given in BS.5440-1:2000. In IE refer to I.S.813:2002.

IMPORTANT.

It is absolutely ESSENTIAL to ensure, in practice, that products of combustion discharging from the terminal cannot re-enter the building or any other adjacent building through ventilators, windows, doors, other sources of natural air infiltration, or forced ventilation / air conditioning.

If this should occur the appliance MUST be turned OFF, labelled as 'unsafe' until corrective action can be taken.

TERMINAL

The terminal assembly can be adapted to accommodate various wall thicknesses. Refer to Frame 14.

Single feed, indirect cylinders are not recommended and MUST NOT be used on sealed systems.

The appliances are NOT suitable for gravity central heating nor are they suitable for the provision of gravity domestic hot water.

The hot water cylinder and ancillary pipework, not forming part of the useful heating surface, should be lagged to prevent heat loss and any possible freezing - particularly where pipes run through roof spaces and ventilated underfloor spaces.

The boiler must be vented.

The hydraulic resistance of the boilers, at MAXIMUM OUTPUT, with an 11 oC (20 oF) temperature differential, is shown in Graph 1.

AIR SUPPLY

It is NOT necessary to have a purpose-provided air vent in the room or internal space in which the boiler is installed. Neither is it necessary to ventilate a cupboard or compartment in which the boiler is installed, due to the low surface temperatures of the boiler casing during operation; therefore the requirements of BS 6798, Clause 12, and BS 5440:2 may be disregarded. In IE the requirements of I.S.813:2002 may be disregarded.

WATER CIRCULATION SYSTEM

IMPORTANT.

A minimum length of 1 metre of copper pipe MUST be fitted to both flow and return connections from the boiler before connection to any plastic piping.

For the types of system and correct piping procedure see Frames 1, and 3 to 8.

The central heating system should be in accordance with BS.6798 and, in addition, for smallbore and microbore systems, BS.5449.

WATER TREATMENT - see Frame 9

The hot water storage cylinder MUST be of the indirect type and should preferably be manufactured of copper.

Graph 1 - Water flow rate and pressure loss
1.0
Boiler						1603Ecl
PressureDrop Across water)(metres
0.5
8.8	11.7	14.7	17.6	20.5	23.4
		Boiler Output (kW)

BOILER CONTROL INTERLOCKS

Ideal Stelrad Group recommend that heating systems utilising full thermostatic radiator valve control of temperature in individual rooms should also be fitted with a room thermostat controlling the temperature in a space served by radiators not fitted with such a valve as stated in BS. 5449.

Central heating systems controls should be installed to ensure the boiler is switched off when there is no demand for heating or hot water.

When thermostatic radiator valves are used, the space heating temperature control over a living / dining area or hallway having a heating requirement of at least 10% of the boiler heat output should be achieved using a room thermostat, whilst other rooms are individually controlled by thermostatic radiator valves. However, if the system employs thermostatic radiator valves on all radiators, or two port valves without end switches, then a bypass circuit must be fitted with an automatic bypass valve to ensure a flow of water should all valves be in the closed position.

ELECTRICAL SUPPLY

WARNING.

This appliance must be earthed.

Wiring external to the appliance MUST be in accordance with the current I.E.E. (BS.7671) Wiring Regulations and any local regulations which apply. For Ireland reference should be made to the current ETCI rules for electrical installations.

The point of connection to the mains should be readily accessible and adjacent to the boiler.

NOTE: THE FAN VOLTAGE IS 325V DC

CONDENSATE DRAIN - Refer to Frames 23 & 49

A condensate drain is provided on the boiler. This drain must be connected to a drainage point. All pipework and fittings in the condensate drainage system MUST be made of plastic - no other materials may be used.

IMPORTANT.

Any external runs must be insulated.

The drain outlet on the boiler is standard 21.5mm (3/4”) overflow pipe.

icos - Installation & Servicing 9