FHP EV Series Installation And Maintenance Manual - page 7
7
EV SERIES
A secondary heat exchanger (plate frame between the unit
and the open cooling tower) may also be used. It is imperative
that all air is eliminated from the closed loop side of the heat
exchanger to prevent condenser fouling.
In the heating mode, heat is absorbed from the water loop to
the unit. A boiler can be utilized to maintain the loop within the
proper temperature range.
Before final connection to the unit, the supply and return
hoses must be connected together and the system flushed to
remove any dirt, piping chips, or any other foreign material.
EARTH COUPLED SYSTEMS: (Figure #7)
NOTE: Closed loop and pond applications require specialized
design knowledge. No attempt at these installations should be
made unless the dealer has received specialized training.
Utilizing Ground Loop Pumping Package (GLP), makes the
installation easy. Anti-freeze solutions must be utilized when
low evaporating conditions are expected to occur. Refer to the
installation manuals for more specific instructions.
ELECTRIC HEATER PACKAGE OPTION:
CAUTION: The HP series heater package requires its own
electrical service separate from the heat pump’s power
supply. DO NOT attempt to wire the package into the same
circuit as the heat pump.
Factory or field installed internal electric heater packages are
available for all EV Series units with the exception of horizontal
straight through configuration models.
Two power supplies are required when utilizing the heater
package option.
Disconnect all power supplies when servicing or installing
heater packages or heat pumps. Failure to do so could result
in serious injury or even death.
When a heater package is utilized the power supply to the
heater package also powers the heat pumps control
transformer primary and the blower motor. This allows control
circuit and motor operation in case of the heat pumps
compressor or associated power supply failure.
When field installing heater packages (refer to the HP Series
Heater Package Installation Instructions), remove the two
factory jumper wires between the comp. contactor (L1 and L2)
and the power interconnect terminal block. Connect (2) two
#14 gauge wires in conjunction with a #16 gauge wire to the
power interconnect terminal block and the electric heater
power block (L1 and L2). (Figure #8).
The heater package power supply is connected to L1 and L2
in the heater package electrical control box and the heat
pump power supply is connected to L1 and L2 of the
compressor contactor. (See figure #8)
Each EV Series heat pump has specific heater packages
available. Nameplate information for wire sizing and fusing are
shown in the above table. All heater packages are 208/240
volt single phase only. For three phase requirements an inline
duct heater from an independent heater manufacturer is
recommended.
SYSTEM CHECKOUT:
After completing the installation, and before energizing the
unit, the following system checks should be made:
•
Verify that the supply voltage to the heat pump is in
accordance with the nameplate ratings.
•
Make sure that all electrical connections are tight and
secure.
•
Check the electrical fusing and wiring for the correct size.
Verify that the low voltage wiring between the thermostat
and the unit is correct.
•
Verify that the water piping is complete and correct.
•
Check that the water flow is correct, and adjust if
necessary.
•
Check the blower for free rotation, and that it is secured
to the shaft.
•
Verify that vibration isolation has been provided.
•
Unit is serviceable. Be certain that all access panels are
secured in place.
UNIT START-UP:
1.
Set the thermostat to the highest setting.
2.
Set the thermostat system switch to “COOL”, and the fan
switch to the “AUTO” position. The reversing valve
solenoid should energize. The compressor and fan should
not run.
3.
Reduce the thermostat setting approximately 5 degrees
below the room temperature.
4.
Verify the heat pump is operating in the cooling mode.
5.
Turn the thermostat system switch to the "OFF" position.
The unit should stop running and the reversing valve
should deenergize.
6.
Leave the unit off for approximately five (5) minutes to
allow for system pressure equalization.
7.
Turn the thermostat to the lowest setting.
8.
Set the thermostat switch to "HEAT".
Add (2) #16
Jumpers for
field installed
Electric Heater
Electric
Heater
Power
Block
Power
Interconnect
Terminal Block
Remove Jumpers
for field installed
electric heat
Comp.
Contactor
(Figure #8)