Mounting Instructions; Water Connection - Elwa HOTRUN 35 Operating And Fitting Instructions Manual

The screws and plugs are supplied with the unit .
1 . Mark the position of the plugs according to the positional template allowing enough space
around the Hotrun to open the Hotrun by removing the top and bottom screws if needed
after installation .
2 . Mount the unit using 2 screws .
3 . Fit the top screw allowing it to stick out approximately 2-3 mm . Slide the securing
bracket onto the screw the Hotrun to the wall with the second screw in the lip sticking out
between the hot and cold water fittings .
1 . The Hotrun has a pre-set minimal cold water supply operating pressure of 100 kPa . The
100 kPa pressure must remain under full flow conditions . When connecting the Hotrun to a
low pressure tank/rainwater system without pressure pump it is unlikely to operate . A larger
pipe size on the cold water supply side might help in these circumstances .
2 . Remove any flow restrictors in shower heads installed after the Hotrun, clean out the
aerators on tap outlets, and make sure these cause minimal backpressure to enable the
Hotrun to switch on and off . The outlet back-pressure needs to be less than the inlet supply
pressure, as the Hotrun switches on by a pressure differential switch .
3 . If the minimal supply pressure is not secured at all times, the Hotrun can fail to switch on .
Ask our advice in this situation .
4 . Connect to the water pipe-work only with the supplied flexible hoses, any other plumbing
fittings used on the water heater voids the warranty . All Hotrun fittings and flexible hoses
are WaterMark approved for the hot and cold water connections and have a flat seal
connection . By using the supplied flexible hoses avoids excessive tension on the Hotrun
fittings . Hand tighten the nuts and secure with ½ a turn with a spanner only .
5 . A model specific flow controller is built in the cold water inlet or can be supplied separately
to fit to the cold water supply inlet fitting with each Hotrun .
6 . The fitting with the blue marking is for the cold water inlet and the one with the
red marking is for the hot water drain and should not be mixed up .
7 . Always use a ½˝ BSP (15mm) 100% bore ball valve on the cold water supply for service
purposes and temperature setting if needed after installation .
8 . Important: After installation open the water tap to flush the device to release all air
from the coil and check all connections. Failing to do so shortens the live-span of the
electric elements .
9 . Use the Hotrun-T 50°C for sanitary fixings for personal hygiene if limited temperatures are
required . The model Hotrun-T50 delivers a non-adjustable temperature of 50°C as mandatory
by the plumbing code and as specified in AS/NZS3498 . Further, a set temperature limited
model set at 40°C for hand wash basins and 45°C for education and aged care facilities is
available . When this manual was printed only for 50°C applications there is no need to
install an additional thermostatic mixing valve as per AS3500 .

Mounting instructions

Water connection

5