The temperature of water required in floor heating systems is less than that required for radiators or stored hot water. If these other services are connected to the same boiler it will be necessary to control the water temperature using one of the Polyplumb water temperature control units.
Modulating Pump Unit (PB970014)
The modulating pump unit controls water temperatures between 45°C and 60°C. The inclusion of a modulating pump ensures that the flow to the floor heating circuits is automatically adjusted to allow for the opening and closing of actuators when individual room temperature is required. The unit is suitable for manifolds demanding up to 15Kw heat load.
The temperature of the water is set using the pilot pin on the hand wheel. When the pilot pin is flush with the hand wheel the temperature is set to 55°C. Each click to + or – increases or decreases the temperature by 1°C.
The modulating pump unit is fitted directly to the manifold at either end by turning the pump through 180°. An additional zone valve is required when using the modulating pump unit supplied by others.
The pack controls water temperatures between 35°C and 60°C, and incorporates a fixed head pump and a 22mm 2-port zone valve, which is suitable for manifolds demanding up to 15Kw heat load. The set temperature of the water is shown on the wheel head.
The control pack is fitted directly to the manifold at either end, as both left hand and right hand connector bends are supplied with the unit.
Dimensions of assembled unit
Note: The valves shown on this diagram are purchased separately and not supplied with the unit. Manifold bends (PB12735) The water temperature control packs can be fitted at 90° to the manifold using the manifold bends.
This allows manifolds and pump units to be corner mounted where space is at a premium, eg understairs cupboard.