13
INSTALLATION AND OPERATION INSTRUCTIONS
BT INDIRECT SERIES – WATER HEATERS
4.2 Aquastat
An Aquastat is also supplied with the IBC Water Heater. The installer can chose
to install either the temperature sensor as described in 4.1 or the Aquastat.
The aquastat mounts in the well provided on the water heater. Electrically the
aquastat will open on temperature rise (stops calling for heat when the water
reaches the desired temperature) and will close when the water temperature
drops below the desired temperature. The aquastat has an 8F (4.4C) fixed
differential.
To install the aquastat, carefully bend the capillary tube/sensing bulb so that
it is at a right angle to the back of the control. Loosen the mounting screw
and carefully insert the sensing bulb into the well until the control mounts to
the well head. Tighten the screw to lock in place. Connect wires (sized for the
voltage being used) to the aquastat terminals. Set the aquastat to the correct
temperature by adjusting the dial so that the desired temperature is at the
pointer. Set the aquastat to the lowest practical setting to meet the consumer’s
needs. The aquastat has a maximum temperature setting of 150F. There is a hot
water scalding potential if the thermostat is set too high. The addition of a scald
protection devise may be required either at the outlet of the water heater or at the
point of use. Check with your local plumbing authority for local requirements.
