Heatrae Sadia HOTFLO User Manual

HOTFLO
1
Installation and User Instructions
for the
HOTFLO
10 and 15 litre Unvented Water Heaters
HEATRAE SADIA
The quality name in water heating
Please read and understand these instructions before starting
work.
Please leave this leaflet with the user following installation
36 00 5719 Issue 3

Heatrae Sadia HOTFLO Specifications

General

Pressure Relief Valve	Yes
Thermal Cutout	Yes
Thermostat	Adjustable
Power Rating	3kW
Installation	Wall Mounted
Approvals	WRAS
Power Supply	230 V, 50 Hz
Heating Element Power	3kW
Material	Mild steel with enamel finish
Warranty	2 years

Summary

Technical Specifications

Important Installation Points

Pressure Relief Valve Requirement

Mandatory fitting of a Pressure (expansion) Relief Valve for safety and warranty.

Expansion within Cold Water Supply

Expansion Vessel Requirement

When an Expansion Vessel is necessary to accommodate thermal expansion.

High Supply Pressure

Action required if static supply pressure exceeds 4.1 bar (60 p.s.i.).

General Installation Requirements

Wall Support and Services

Water Connections

Electrical Installation Requirements

Earthing and Supply

Appliance must be earthed; suitable for AC supply only.

Flexible Cable and Fusing

Details on the supplied flexible cable and required fusing.

Wiring Colour Code

Discharge Pipe Requirements

Discharge Pipe Connection

Connecting relief valves to a discharge pipe, recommending a tundish.

Pipe Fall and Obstruction

Pipe Sizing and Material

Discharge Point Safety

The final discharge point must be in a safe, visible position.

Commissioning

Pre-Commissioning Checks

Filling and Flushing

Safety Valve Test

Manually testing the operation of the Pressure Relief Valve(s).

Powering On

Maintenance

Maintenance - Safety Valves

Regular Checking

Maintenance - Expansion Vessel Precharge Pressure

Checking Precharge Pressure

Fault Finding

User Instructions

Important Notes to User