Water Tank Refill; Initial Start-Up - Bosch SM024 Installation, Operation And Maintenance Manual

12 | Heat Recovery Package

Water Tank Refill

1. Open the cold water supply to the tank.
2. Open a hot water faucet to vent air from the
system until water flows from the faucet, then
close.
3. Depress the hot water tank pressure relief
valve handle to ensure there is no air remaining
in the tank.
4. Carefully inspect all plumbing for water leaks.
Correct as required.
5. Purge all air from HR by depressing the
schrader valve on the HR Unit. Allow all air to
bleed out until water appears at the valve.
All piping from HRP to domestic water tank
must be copper or any metal of stronger
alloy.
6. Before restoring the power or fuel supply to
the water heater, adjust the temperature
setting on the tank thermostat(s) to ensure
maximum utilization of the heat available from
the refrigeration system and conserve the most
energy. On tanks with both upper and lower
elements and thermostats, the lower element
should be turned down to 100° F, while the
upper element should be adjusted to 120° F.
Depending upon the specific needs of the
customer, you may need to adjust the upper
element differently. On tanks with a single
thermostat lower the thermostat setting to
120° F or the "LOW" position. After thermostat
adjustments are completed, replace access
cover and restore electrical or fuel supply to
water heater.
8 733 920 846 (2013/11)

Initial Start-Up

Make sure all valves in heat recovery water
piping system are open. NEVER OPERATE
HR PUMP DRY.
1. Turn on the heat pump. The HR pump should
not run if the compressor is not running.
2. Turn HR switch to the "ON" position. The pump
will operate if entering water temperature to
HR is below 120° F.
3. The temperature difference between the water
entering and leaving the heat recovery should
be 5° to 15° F.
4. Allow the unit to operate for 20 to 30 minutes
to ensure it is functioning properly. The pump
should shut off when the water temperature
entering the heat recovery reaches 120°F.
Subject to change without prior notice
SM CS Series Heat Pump
SM CS Series Heat Pump