Talon Nate Heat Pump 1
What is a thermal equilibrium point of a duel fuel heat pump? - ANSOutdoor conditions which
the capacity of a single heat pump matches the capacity of a supplementary heater
Which ACCA manual should the technician consult to make an accurate calculation of
residential load? - ANSACCA J Manual
What is the minimum ampacity of a circuit listed on the data plate of a packed heat pump used
to determine? - ANSThe average amperage of equipment when it is working properly
What is the relationship between the input current and the holding current of a delay coil? -
ANSInput current starts time delay relay timer, holding current starts relay
Only one accumulator from the suction line should be used in a residential heat pump as
recommended by the manufacturer. Yes? - ANSExtending refrigerant lines increases the system
charge above the maximum recommended charge.
Which of the following operations is an important reason to use Electronic controls? -
ANSElectronic Controls can make decisions based on many inputs of information
Generally, heat pumps are sized for the conditioned space based on? - ANSCooling load
What is an effective method to reduce noise transmissions from the air handler installed in a
closet? - ANSKeep cabinet on insulation pad
Ability of programmable electronic thermostats to set the set point so the temp reaches that
point at a specified time - ANSComputed recovery
How do controls use those two temperatures to determine if it is necessary to defrost? - ANSAs
the coil freezes, the temperature difference between the coil and outside air increases
In accordance to fire protection codes, when should dampers be used? - ANSIn any air duct
that passes through a fire retardant wall for two hours
When wiring 20 amperes motor (FLA), the minimum circuit ampacity (MCA) must be - ANS25
What is the typical method to determine the stages of a two-stage compressor in a heat
system? - ANSA deviation from the thermostat set point
The thermostatic expansion valve does what to maintain the flow of refrigerant to a condenser?
- ANSMaintains superheat of refrigerant coming out of the condenser.
, What do Electronic air cleaners not eliminate? - ANSSmells or odors
The purpose of a sequencer in a 20KW auxiliary electric heater is to energize? - ANSFirst to
energize all heating elements, then to the fan
What is the TXV's job - ANSMaintain constant superheat
The coefficient of performance (COP) of a heat pump is? - ANSThe total electric input in watts
divided by the output in watts
Low pressure limit controls are often placed in the suction line of a heat pump for which two
purposes - ANSTo protect compressor if suction pressure drops and to detect pressure drop
The diameters and lengths of the R-22 steam lines are generally specified for a drop in steam
pressure that should not exceed what value? - ANS-2 to 3 PSI or 2°F (-16°C)
To consider that an evacuation is complete, the refrigerant circuit of a heat pump must be
evacuated to a minimum of? - ANS500 microns
What is important to take into account when bending soft copper pipes in a double of any
angle? - ANSThe cross-sectional area of the tube should not be significantly reduced. ( so that it
doesn't kink)
Which of the following positions should mount the thermostatic expansion valve sensing bulb to
more accurately measure the temperature of the suction lines are 1 1/8 inches (6.8cm) or
higher. - ANS4 or 8 o' clock
A disc type pressure control, closing on rising is used as a pressure drop limit control in the
liquid line of a heat pump. The control must feel the specified pressure within the 15 seconds of
compressor startup for the compressor to continue operating. If the control cutoff setting
deviates downward. What does this mean for system performance? - ANSThe system is less
likely to shut down as a result of a small leak
What can cause a system purged to 500 micron to show a immediate & continuous increase in
pressure when the valve of the vacuum pump is off? - ANSThere is a leak in the system
What happens if the residue from defrosting does not drain properly? - ANSExcess water will
create an electrical hazard.
What is used to measure the static pressure of a duct? - ANSDifferential pressure gauge.
The component used to transmit sound and prevent water leaks from a heat pump installed on a
roof is? - ANSEdge Joint (curb gasket)
What is a thermal equilibrium point of a duel fuel heat pump? - ANSOutdoor conditions which
the capacity of a single heat pump matches the capacity of a supplementary heater
Which ACCA manual should the technician consult to make an accurate calculation of
residential load? - ANSACCA J Manual
What is the minimum ampacity of a circuit listed on the data plate of a packed heat pump used
to determine? - ANSThe average amperage of equipment when it is working properly
What is the relationship between the input current and the holding current of a delay coil? -
ANSInput current starts time delay relay timer, holding current starts relay
Only one accumulator from the suction line should be used in a residential heat pump as
recommended by the manufacturer. Yes? - ANSExtending refrigerant lines increases the system
charge above the maximum recommended charge.
Which of the following operations is an important reason to use Electronic controls? -
ANSElectronic Controls can make decisions based on many inputs of information
Generally, heat pumps are sized for the conditioned space based on? - ANSCooling load
What is an effective method to reduce noise transmissions from the air handler installed in a
closet? - ANSKeep cabinet on insulation pad
Ability of programmable electronic thermostats to set the set point so the temp reaches that
point at a specified time - ANSComputed recovery
How do controls use those two temperatures to determine if it is necessary to defrost? - ANSAs
the coil freezes, the temperature difference between the coil and outside air increases
In accordance to fire protection codes, when should dampers be used? - ANSIn any air duct
that passes through a fire retardant wall for two hours
When wiring 20 amperes motor (FLA), the minimum circuit ampacity (MCA) must be - ANS25
What is the typical method to determine the stages of a two-stage compressor in a heat
system? - ANSA deviation from the thermostat set point
The thermostatic expansion valve does what to maintain the flow of refrigerant to a condenser?
- ANSMaintains superheat of refrigerant coming out of the condenser.
, What do Electronic air cleaners not eliminate? - ANSSmells or odors
The purpose of a sequencer in a 20KW auxiliary electric heater is to energize? - ANSFirst to
energize all heating elements, then to the fan
What is the TXV's job - ANSMaintain constant superheat
The coefficient of performance (COP) of a heat pump is? - ANSThe total electric input in watts
divided by the output in watts
Low pressure limit controls are often placed in the suction line of a heat pump for which two
purposes - ANSTo protect compressor if suction pressure drops and to detect pressure drop
The diameters and lengths of the R-22 steam lines are generally specified for a drop in steam
pressure that should not exceed what value? - ANS-2 to 3 PSI or 2°F (-16°C)
To consider that an evacuation is complete, the refrigerant circuit of a heat pump must be
evacuated to a minimum of? - ANS500 microns
What is important to take into account when bending soft copper pipes in a double of any
angle? - ANSThe cross-sectional area of the tube should not be significantly reduced. ( so that it
doesn't kink)
Which of the following positions should mount the thermostatic expansion valve sensing bulb to
more accurately measure the temperature of the suction lines are 1 1/8 inches (6.8cm) or
higher. - ANS4 or 8 o' clock
A disc type pressure control, closing on rising is used as a pressure drop limit control in the
liquid line of a heat pump. The control must feel the specified pressure within the 15 seconds of
compressor startup for the compressor to continue operating. If the control cutoff setting
deviates downward. What does this mean for system performance? - ANSThe system is less
likely to shut down as a result of a small leak
What can cause a system purged to 500 micron to show a immediate & continuous increase in
pressure when the valve of the vacuum pump is off? - ANSThere is a leak in the system
What happens if the residue from defrosting does not drain properly? - ANSExcess water will
create an electrical hazard.
What is used to measure the static pressure of a duct? - ANSDifferential pressure gauge.
The component used to transmit sound and prevent water leaks from a heat pump installed on a
roof is? - ANSEdge Joint (curb gasket)
