Which direction should V-Guard TRU HOT DAF solar heater face?

V-Guard TRU HOT DAF solar water heater must face SOUTH for maximum solar energy absorption. The system needs 6-8 hours of shadow-free sunlight daily. Avoid shadows from trees, buildings, overhead tanks, and walls.

What pipe size is needed for V-Guard TRU HOT DAF installation?

For 100-300 LPD V-Guard TRU HOT DAF: use 3/4 inch CPVC pipe. For 500 LPD system: use 1 inch CPVC pipe. All pipes must withstand 100°C temperature. Insulate all exposed hot water pipes to prevent heat loss.

Can I connect V-Guard solar heater directly to municipal water supply?

No! V-Guard TRU HOT DAF must be connected ONLY to overhead tank. Never connect directly to municipal supply or water pump. This can damage the system and void warranty. Install horizontal NRV in inlet line and mandatory air vent pipe.

What is the performance of V-Guard TRU HOT DAF on sunny days?

V-Guard TRU HOT DAF raises water temperature by 10°C to 40°C on sunny days. Overnight temperature drop is only 3°C to 5°C due to DAF (Double Anti-Freeze) insulation. In Coimbatore's climate, it provides 60-80°C hot water on most days.

What to do if a tube breaks in V-Guard TRU HOT DAF?

If a tube breaks: immediately close the inlet valve to stop water flow, then contact Arun Hitech service center at 99424 87774. Do not expose the broken system to sunlight. Our certified technicians will replace the tube same day or next day in Coimbatore.

How much height difference is needed between heater and overhead tank?

Maximum height from heater inlet to overhead tank top is 2.5 metres. This ensures proper thermosyphon water circulation without a pump. Place the system near utility points to minimize pipe length and reduce heat loss.

TruHot DAF Solar Heater Installation Guide

Step-by-Step Guide

TRU HOT DAF — Complete Installation, Plumbing & Safety Guide

🏗️

Installation Instructions

Install preferably on flat roof for best stability and access.

Roof must support full system weight including water. Verify structural strength before installation.

☀️ Face SOUTH — mandatory for maximum solar energy absorption throughout the day.

Ensure 6–8 hours shadow-free sunlight daily for optimal performance.

Avoid shadows from: Trees · Buildings · Overhead tanks · Walls

Maximum height from heater inlet to overhead tank top: 2.5 metres for proper thermosyphon flow.

Place near utility points to reduce heat loss in pipes.

Support structures must be properly grouted — use cement mortar for stability.

🔧

Plumbing Instructions

Connect ONLY to overhead tank — this is mandatory for proper operation.

❌ Do NOT connect to: Municipal supply · Water pump — this will damage the system.

Install horizontal NRV (Non Return Valve) in inlet line to prevent backflow.

Air vent pipe is mandatory — prevents pressure buildup and ensures proper operation.

Recommended pipe sizes:
¾ inch CPVC → 100–300 LPD 1 inch CPVC → 500 LPD

All pipes must withstand 100°C — use only CPVC pipes, NOT PVC or regular pipes.

Insulate all exposed hot water pipes to prevent heat loss, especially overnight.

⚠️ Important: Wrong plumbing connections will void the warranty. Always use V-Guard certified technicians for installation. Call Arun Hitech: 99424 87774.

📊

Performance Specifications

🌡️ Water temp rise (sunny day)	10°C → 40°C
🌙 Overnight temp drop	3°C → 5°C only
☀️ Sunlight required (daily)	6–8 hours
📐 System orientation	South facing
📏 Max tank height diff	2.5 metres
🌡️ Max pipe temperature	100°C
📦 Pipe size (100-300 LPD)	¾ inch CPVC
📦 Pipe size (500 LPD)	1 inch CPVC

✅ In Coimbatore's climate: V-Guard TRU HOT DAF typically achieves 60–70°C water temperature on clear sunny days, providing hot water for 2–3 days even without sunshine.

🛡️

Safety Precautions

Cover evacuated tubes during installation — direct sunlight on empty tubes can cause overheating.

Fill system with water BEFORE exposing to sunlight — never let empty tubes face sun.

Use proper earthing for all electrical connections — mandatory safety requirement.

Install ELCB protection (Earth Leakage Circuit Breaker) for electrical safety.

Prevent objects from falling on evacuated tubes — tubes are glass and fragile.

System must always remain filled with water — never operate dry.

If not used for 3+ days: Cover evacuated tubes to prevent dry overheating.

If tube breaks: Close inlet valve immediately → Call Arun Hitech service: 99424 87774

🚨 Emergency: Tube breakage or system leakage — close inlet valve immediately and call 99424 87774. Do NOT attempt repairs yourself.

Expert Q&A

TRU HOT DAF — Frequently Asked Questions

Which direction should V-Guard TRU HOT DAF face?

Answer: The system must face SOUTH for maximum solar energy absorption. Ensure 6-8 hours of shadow-free sunlight. Avoid shadows from trees, buildings, overhead tanks, and walls — even partial shadows reduce output by 30-50%.

What pipe size is needed for V-Guard TRU HOT DAF?

Answer: Use ¾ inch CPVC for 100-300 LPD systems and 1 inch CPVC for 500 LPD. All pipes must withstand 100°C — use CPVC only, never regular PVC. Insulate all exposed hot water pipes to minimize heat loss overnight.

Can I connect directly to municipal water supply?

Answer: No! TRU HOT DAF must connect ONLY to overhead tank. Direct connection to municipal supply or water pump will cause pressure damage and void warranty. Always install horizontal NRV in inlet line and mandatory air vent pipe.

What temperature does TRU HOT DAF achieve in Coimbatore?

Answer: TRU HOT DAF raises water temperature by 10°C to 40°C on sunny days. In Coimbatore's climate, expect 60-70°C on clear days. Overnight drop is only 3-5°C due to DAF insulation. Hot water stays warm for 2-3 days even without sunshine.

What to do if a tube breaks?

Answer: Immediately close the inlet valve to stop water flow. Do not expose broken system to sunlight. Call Arun Hitech service: 99424 87774. Our certified technicians will replace the tube same day or next day in Coimbatore, Tiruppur, Erode and surrounding areas.

What if the system is not used for 3 days or more?

Answer: If not used for 3+ days, cover the evacuated tubes to prevent dry overheating. This is especially important in peak summer. Always ensure the system remains filled with water. Contact Arun Hitech 99424 87774 if you need long-term shutdown assistance.

V-Guard TRU HOT DAF — Complete Installation Guide & Specifications