Installation Instructions
Supply water piping
•Do not use PVC, iron, or any piping which has been treated with chromates, boiler seal or other chemicals.
•Pipe sizing from the cold water supply should be sized according to local BY LAWS for water supply.
•If sludge or foreign matter is present in the water supply it is recommended that a separate filter/ strainer be fitted to the cold water supply line.
•A solar transfer valve must be fitted with all solar applications using this appliance. So- lar systems fitted without a solar transfer valve will void all Bosch Warranty.
•A GATE VALVE OR BALL VALVE must be used on the cold water inlet to the water heater. THIS REQUIREMENT IS AN AUSTRALIA WIDE RE- QUIREMENT UNDER THE NATIONAL PLUMBING CODE.
STOP TAPS OR COMBINATION STOP TAPS AND
•In order for the client to use the water heater comfortably, 200 to 1000 kPa of pressure is needed from the water supply.
Be sure to check the water pressure. If the water pressure is low, the water heater cannot perform to its full capability, and may become a source of trouble for the client.
Drain processing
•Expansion water may drop from the pressure relief valve and wet the floor.
Hot water piping
•Do not use lead, PVC, iron or any piping which has been treated with chromates, boiler seal or other chemicals.
•Keep the pipe lengths to a minimum, and make sure that the pipework is well insulated as correct performance of the appliance is dependent on properly insulated pipework.
•DO NOT FIT ANY VALVES OR RESTRICTORS TO THE OUTLET OF THE WATER HEATER.
•DO NOT FIT ANY OBSTRUCTION TO THE PRESSURE RELIEF LOCATED ON THE HOT WATER OUTLET CONNECTION.
•Use mixing valves with low water resistance. Use shower heads with low pressure loss.
•If necessary, use a pump or other means to en- sure that the supply water pressure to the inlet of the heater does not fall below 199kPa when the maximum amount of water is being demanded. Also install a pressure meter on the inlet. If this is not done, local boiling will occur inside the water heater causing abnormal sounds and decreasing the durability of the heat exchanger.
After purging the air from the system using the hot water supply taps, remove the water inlet strainer located on the cold water supply inlet connection. Remove any debris from the filter and replace. When replacing the filter, do not
It is recommended that for sanitary fixtures use primarily for the purpose of personal hygiene, that a temperature control device be fitted (such as a tempering valve) as per AS3498.
No pressure reduction valve is required unless the water pressure exceeds 1000 kPa.
11
