Ideal Boilers Mexico Super 4100 FF - 4125 FF Installation And Service Manual

Ideal Boilers Mexico Super 4100 FF - 4125 FF Installation And Service Manual Manual pdf 22 page image

22Mexico Super 4100 FF & 4125 FF - InstallationINSTALLATIONNotes.a. Flow and return pipes should rise vertically on leaving theboiler.b. Horizontal pipes should be ABOVE ceiling level and as shortas possible.c. A MINIMUM inclination of 25 mm per 3 m run (1" per 10') isrequired to avoid air locks.If the above conditions cannot be met pumped primaries shouldbe used.1. Separate flow and return connections are used for eachservice. All possible configurations are given in Frame 8 andONLY those shown should be used.2. The schematic pipework graph is based on the assumptionthat NO MORE than 8 elbows are used in the gravity loop,including entry to the boiler.3. For each extra elbow in excess of 8 (R) MUST be reduced by300 mm (12") or (H) increased by 100 mm (4")4. Whatever value is selected for (R), the value of (H) MUST beat least that indicated by the graph.(R) =the horizontal distance between the centre line of thecylinder and the boiler tappings used - measured alongthe pipe run.(H) =the vertical distance between the top of the boiler andthe base of the cylinder.41 MINIMUM REQUIREMENTS Fully pumped systems1. Open vent and cold feed connections must be made to the boilerflow and return tappings according to the options shown in Frame8.2. The boiler is assumed to be the highest point of thecirculating system.3. The circulating pump is positioned on the FLOW andthe vertical distance, between the pump and feed/expansion tank, must comply with the pumpmanufacturer's minimum requirements, to avoidcavitation. Should these conditions not apply, eitherlower the pump position or raise the feed/ expansiontank above the minimum requirements of CaradonIdeal Ltd.4. The water velocity through the boiler flow / return pipesis assumed to be below 1 m/s (3 ft./s), whilst the pumpflow rate is set to provide a temperature difference of11 oC (20 oF) across the boiler flow / return, at designinput.5. This information is intended as a GUlDE ONLY andcannot take into account instantaneous changes inhead caused by the operation of motorised valves,pumps etc.Due allowance MUST be made if surging is liable tooccur.If in any doubt, contact Caradon Ideal Ltd.42 GRAVITY HOT WATER & PUMPED CENTRAL HEATINGINSTALLATION