Tritherm Single Circuit Pump and Mixing Valve Pack

The Tritherm UFH Heating Single Room Control Pack is a compact, bolt-on solution designed to provide temperature-controlled mixed water for single-room underfloor heating applications. Ideal for extensions, conservatories, or small renovations, this unit covers areas up to 40 square meters with a heat output of up to 3kW.
The pack blends hot water from the primary heating system with cooler return water to maintain a safe, constant temperature within the underfloor loops. It is available with one of three industry-leading pumps: Grundfos, Wilo, or Bastion, allowing you to choose the best option for your specific requirements.

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Key Product Features

Feature	Detail	Benefit
Pump Choice	Grundfos / Wilo / Bastion	Select from three high-efficiency, ‘A’ rated 6-meter circulating pumps to suit your preference3.
Coverage	Up to 40 sqm (3kW)	Perfect for single rooms, conservatories, or extensions4.
Mixing Control	Thermostatic Valve	Adjustable from 35°C to 60°C (Factory set at 43°C)55.
Connections	Integral Ball Valves	Allows easy connection and isolation from the primary heating system6.
Mounting	Anti-vibration Bracket	Ensures silent operation; can be mounted horizontally or vertically777.
Accuracy	+/- 2°C	Maintains stable temperature even with fluctuating boiler flow8.

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Versatile Pump Options

To ensure maximum flexibility and reliability, the ZL-2532 is compatible with three distinct high-efficiency pumps. All options are pre-wired for easy installation.

• Grundfos UPM3 Flex AS: A market-leading pump featuring intelligent PWM signal control and speed selection for optimal energy efficiency.
  
• Wilo A Rated: A robust and compact pump utilizing “Green Button” technology for simple setting changes between variable and constant pressure modes.
  
• Bastion A Rated: A cost-effective, energy-compliant alternative (EEI ≤ 0.20) featuring specific modes for underfloor heating applications.

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Technical Specifications

Detail	Specification
Maximum Static Pressure	10 bar
Control Range	35°C to 60°C 13
Factory Pre-set	43°C 14
Primary Connections	15mm Compression (via ball valves) 15
UFH Connections	G 1/2″ Female (tappings provided for adaptors) 16
Heat Output	Up to 3kW 17
Voltage	230V AC 50Hz (3 Amp fused spur required) 18

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Application & Temperature Settings

The thermostatic blending valve ensures water temperature remains safe for various floor finishes.

• Screeded Floors: Recommended setting 40-45°C.
  
• Timber Floors: Recommended setting 55-60°C.
  
• Safety Limit: Floor surface temperature should not exceed 29°C (27°C for timber/laminate) to prevent discomfort or material damage.

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Hydraulic Performance (Pump Curve)

The following table approximates the hydraulic performance for the 6-meter head pumps (Grundfos, Wilo, and Bastion) used in these packs. This data helps confirm the pump can handle the pressure drops in typical single-room loops.

Head vs. Flow Characteristics

Flow Q (m³/h)	Head H (m)	Application Note
0.0	6.0	Max Head (Closed Valve)
0.5	5.5	High Resistance Loops
1.0	4.5	Standard Single Room Loop
1.5	3.5	Larger Extensions
2.0	2.5	Max Recommended Flow
3.0	0.5	Max Volume Flow

Pump	System + Wilo A Rated 6m, System + Grundfos UPM3, System + Bastion A Rated 6m