Table of Contents
Advertisement
20 | Typical System Setup
SPECIFIC APPLICATION
CONSIDERATIONS
Well Water Systems
Copper is adequate only for ground water that is
not high in mineral content. Proper testing to
ensure the well water quality is suitable for use
with water source equipment is required. (See the
Water Quality table on page #14.) In conditions
anticipating moderate scale formation or in
brackish water a cupro-nickel heat exchanger is
required. In well water applications, water
pressure must always be maintained in the heat
exchanger. This can be accomplished with either a
control valve or a bladder-type expansion tank.
When using a single water well to supply both
domestic water and the heat pump, care must be
taken to ensure that the well can provide sufficient
flow for both. In well water applications, a
slow-closing solenoid valve must be used and
installed on the leaving-water side of coaxial to
prevent water hammering. Solenoid valves must be
connected across Y1 and C1 on the interface board
for all. Make sure that the VA draw of the valve
does not exceed the contact rating of the
thermostat.
Cooling Tower/Boiler Systems
The cooling tower and boiler water loop
temperature is usually maintained between 50°F
to 100°F to ensure adequate cooling and heating
performance. In the cooling mode, heat is ejected
from the unit into the water loop. A cooling tower
provides evaporative cooling to the loop water
thus maintaining a constant supply temperature to
the unit. When utilizing open cooling towers,
chemical water treatment is mandatory to ensure
the water is free from corrosive elements. A
secondary heat exchanger (plate frame) between
the unit and the open cooling tower may also be
used.
It is imperative that all air be eliminated from the
closed-loop side of the heat exchanger to ensure
against fouling. In the heating mode, heat is
absorbed from the water loop. A boiler can be
utilized to maintain the loop at the desired
temperature.
Cooling Tower/Boiler Systems Piping
NOTICE: Water piping exposed to extreme
low ambient temperatures is subject to
freezing.
8733827906 (2021/11)
Teflon tape sealer must be used when
connecting to the unit to insure against
leaks and possible heat exchanger fouling.
Consult Bosch LM split CS ESS (Engineer
Submittal Sheet) for pipe connection sizes.
Do not overtighten the connections.
Flexible hoses must be used between the unit and
the rigid system to avoid possible vibration.
Ball valves must be installed in the supply and
return lines for unit isolation and unit water flow
balancing.
Pressure/temperature ports are recommended in
both supply and return lines for system flow
balancing. Water flow can be accurately set by
measuring the water-to-refrigerant heat
exchangers' water-side pressure drop. (See Table
#21, on page #36, for water flow vs. pressure
drop information.)
Do not connect the unit to the supply or return
piping until the water system has been completely
cleaned and flushed to remove any dirt, piping
chips, or other foreign material. Connect the
supply and return hoses together during this
process to ensure the entire system is properly
flushed. After the cleaning and flushing has taken
place, the unit may be connected to the water loop
with all valves fully open.
Geothermal Systems
Closed-loop and pond applications require
specialized design knowledge. No attempt at these
installations should be made unless the dealer has
received specialized training. Using the Ground
Loop Pumping Package (GLP), makes the
installation easy. Anti-freeze solutions are utilized
when low-evaporating conditions are expected to
occur. Refer to the GLP installation manuals for
specific instructions.
Subject to change without prior notice
LM Split CS Series Heat Pump
LM Split CS Series Heat Pump
Advertisement
Table of Contents
Troubleshooting
