Piping; Electrical - Bosch FHP EC Large Series Installation, Operation And Maintenance Manual

EC Series
NOTE: Application of the unit to no insulated
duct work is not recommended as the unit's
performance will be adversely affected.
NOTE: The factory provided air filter must be
removed when using a filter back return air grill.
The factory filter should be left in place on a free
return system
NOTE: Do not connect discharge ducts
directly to the blower outlet.
If the unit will be installed in a new installation
which includes new duct work, the installation
should be designed using current ASHRAE
procedures for duct sizing.
If the unit is to be connected to existing duct work,
a check should be made to assure that the duct
system has the capacity to handle the air required
for the unit application. If the duct system is too
small, larger duct work should be installed. Check
for existing leaks and repair.
The duct system and all diffusers should be sized
to handle the designed air flow quietly. To
maximize sound attenuation of the unit blower, the
supply and return air plenums should be insulated.
There should be no direct straight air path thru the
return air grille into the heat pump.
The return air inlet to the heat pump must have at
least one 90 degree turn away from the space
return air grille.
If air noise or excessive air flow are a problem, the
blower speed can be changed to a lower speed to
reduce air flow.
(Refer to ECM motor interface board section in
Figure#11)

PIPING

Supply and return piping must be as large as the
unit connections on the heat pump (larger on long
runs).
NOTE: Never use flexible hoses of a smaller
inside diameter than that of the fluid
connections on the unit.
EC Series
EC units are supplied with either a copper or
optional cupro-nickel condenser. Copper is
adequate for ground water that is not high in
mineral content.
NOTE: Proper testing is recommended to
assure the well water quality is suitable for use
with water source equipment.
In conditions anticipating moderate scale
formation or in brackish water a cupro-nickel heat
exchanger is recommended.
NOTE: Both the supply and discharge water
lines will sweat if subjected to low water
temperature. These lines should be insulated to
prevent damage from condensation.
All manual flow valves used in the system must be
ball valves. Globe and gate valves must not be used
due to high pressure drop and poor throttling
characteristics.
NOTE: Never exceed the recommended
water flow rates as serious damage or
erosion of the water-to-refrigerant heat
exchanger could occur.
Always check carefully for water leaks and rECair
appropriately. Units are equipped with female pipe
thread fittings. Consult Unit Dimensional
Drawings. (Pg#33 through Pg#34)
NOTE: Teflon tape sealer should be used when
connecting water piping connections to the units
to insure against leaks and possible heat
exchanger fouling.
NOTE: Do not overtighten the connections.
Flexible hoses should be used between the unit
and the rigid system to avoid possible vibration.
Ball valves should be installed in the supply and
return lines for unit isolation and unit water flow
balancing.

ELECTRICAL

Refer to electrical component box layout.
(Figure#10)
WARNING: Field wiring must comply
with local and national electric codes.
Piping | 7
T111970289 (2015/01)