Transcript No Slide Title

Last Day Of The Heat Pump
Section.
» Today we’ll look at performance
ratings, supplemental resistance
heat and dual fuel systems.
» Then we’ll break before taking our
test.
Performance Ratings
EFFICIENCY
> EER
> COP
> SEER
> HSPF
EER
BTU’S OUT
POWER IN
39,000 BTU/HR.
4380 WATTS/HR.
=
8.9 BTU/WATT
COP
BTU’S OUT
39,000 BTU/HR
BTU’S WE
4380 WATTS/HR X 3.1413 BTU/WATT
PAY FOR
=
2.6
COP FOR HEAT PUMP AND
RESISTANCE HEAT
4.0
3.0
HEAT PUMP
2.0
RESISTANCE HEAT
1.0
0
-20
-10
0
10 20
30
40
50
OUTDOOR TEMPERATURE
60
HSPF
HEATING SEASONAL PERFORMANCE FACTOR
• TOTAL HEATING OUTPUT OF A HEAT
PUMP DURING ITS NORMAL ANNUAL
USAGE PERIOD FOR HEATING DIVIDED
BY THE TOTAL ELECTRIC POWER INPUT
IN WATT-HOURS DURING THE SAME
PERIOD
SEER
SEASONAL ENERGY EFFICIENCY RATIO
• TOTAL COOLING OF A CENTRAL
UNITARY AIR CONDITIONER OR
UNITARY HEAT PUMP IN BTU’S DURING
ITS NORMAL ANNUAL USAGE PERIOD
FOR COOLING DIVIDED BY, THE TOTAL
ELECTRIC POWER INPUT IN WATTHOURS DURING THE SAME PERIOD
OUTDOOR TEMPERATURE
WHEN CAPACITY DROPS
WHAT CAUSES CAPACITY
TO DROP
GAS
DENSITY
DECREASES
+
SHORTER
EFFECTIVE
STROKE
=
DECREASED
FLOW
RATE
Effective compressor
stroke
250
60
60
250
60
59
250
60
60
250
60
100
250
60
250
250
60
251
250
1.50”
60
250
•
•
•
•
•
•
•
•
Climatuff Scroll
TTY030B Introduction
April
TTY036 - 60B
July
TWX030D
July
TTP048 _ 60D1,3,4
July
TTR060D1
July
TTB060 TTA060D3,4
4th Qtr.
TWR060D TWA060D3,4
4th Qtr.
TTR042-48D TTB048 TTA048D3,4
Late 4th Qtr.
• TWR048D1 TWA048D3,4
Late 4th
Qtr.
CAPACITY VS. HEAT LOSS
SUPPLEMENTAL
HEAT
NEEDED
TEMPERATURE
ELECTRIC HEAT
•
•
•
•
SUPPLEMENTAL HEAT
EMERGENCY HEAT
AUXILIARY HEAT
RESERVE HEAT
THERMAL BALANCE
POINT
HEAT LOSS
HEATING
CAPACITY
HEAT
PUMP
=
CAPACITY VS. HEAT LOSS
BTU/HR
45,000
21,000
10F
OUTDOOR TEMPERATURE
50F
BALANCE POINT
BTU/HR
BALANCE
POINT
34,500
0
32.5F
OUTDOOR TEMPERATURE
65F
DESIGN POINT
BTU/HR
57,500
NEED
36,500 BTU/HR
ADDITIONAL
21,000
DESIGN
POINT
10F
OUTDOOR TEMPERATURE
EMERGENCY HEAT
BTU/HR
57,500
X 1.00
57,500 BTU/HR
57,500
57,500 BTU/HR
3413 BTU/KW
10F
= 16.8 KW
TOTAL CAPACITY
WITH 17 KW HEATER PACKAGE
BALANCE POINT
1 ST STAGE ELECTRIC HEAT
BALANCE
POINT
22.5F
OUTDOOR TEMPERATURE
BALANCE POINT
2ND STAGE ELECTRIC HEAT
BALANCE
POINT
13F
OUTDOOR TEMPERATURE
BALANCE POINT
3RD STAGE ELECTRIC HEAT
BTU/HR
BALANCE POINT
DESIGN
POINT
4F
10F
OUTDOOR TEMPERATURE
Heat pump with heat strips
• This application has a 17KW heat strip. You
will see that W2 heat strip is brought on
during defrost.
• The W1 and W3 heat strips are controlled
by outdoor thermostats. Only bringing them
on as the outdoor temperature drops.
TO LINE VOLTAGE SUPPLY
TDL
SUMP HTR
PURPLE/WH
PURPLE/WH
CS
MS-1
BLACK
CSR-1
CSR
BR
BK/BL
OR
RD
BLACK
BR/RD
OR
BROWN
CF
PURPLE
LO
RD
FAN
MTR
HI
S
CPR IOL
R
CR
RD
RED
BL/WH
OFT-B
OFT-A
BLACK
BK/RD
CBS
YL
RD
YL
BK
BK
R B B
Y1
O O
Y Y X2 F
ODS-B
RD
YL
YL
BK
T1
R B B
O O
BK
Y Y X2 F
RD/WH
BL
OR
YL
O
BK
OR
BLACK
WS
X
X
BK
X
BK
O
Y
Y
W3
BK
X
O
X2
X
BK
SM-1
HEAT
HEATER
CONTROLS
W2
RHS-1
TS
X2
X
X
W1
G
ODS-A
COOL
CA
J
FAN
CONTROL
BD
OFF
HA
Y
YL
F
F
G
SM-2
AUTO
COOL
RD
ON
RHS-2
T
T
BR
T
T
ODA
TSH
W
U
B
BL
B
B
R
R
RD
BL
R
RD
TYPICAL AIR HANDLER
TO POWER SUPPLY PER
LOCAL CODES
TYPICAL MANUAL CHANGE OVER THERMOSTAT
EMERGENCY HEAT
RELAY PACKAGE
MAINTAINS COMFORT IF HEAT PUMP FAILS BY
1
2
3
LOCKING
OUT
COMPRESSOR
BYPASSING
OUTDOOR
THERMOSTAT
BRINGING
ON FULL
STRIP HEAT
SQUEEZING OUT
OPERATIONG $
• DECREASE BALANCE POINT
– OVERSIZE HEAT PUMP
– UPGRADE BUILDING INS. & GLAZING
– TURN DOWN THE THERMOSTAT
• DUAL - ALTERNATIVE HEATING
SYSTEM
• 2 - STAGE HEAT PUMP
LOAD CALCULATION
AIR FLOW
CHARGING
CAPACITY
LOCATING THE UNIT
• AIR CONSIDERATIONS
– AVOID RECIRCULATION
– CUT OFF PREVAILING WIND
• WATER DRAINAGE
– ALLOW CLEARANCE FOR WATER DRAIN OFF
• SNOW CONSIDERATIONS
– AVOID SNOW DRIFTS
– RAISE UNIT IN HEAVY SNOW AREAS
DUAL
FUEL
HEATING “ON”
CYCLE
FOSSIL FUEL
HEAT PUMP
TEMP
TIME
DUAL FUEL SYSTEMS
• DEPENDS ON THE COST OF ELECTRICITY AND
PRICE OF THE FOSSIL FUEL
• LESS EXPENSIVE TO HEAT COMPRESSIONCYCLE EQUIPMENT WHEN THE OUTDOOR
TEMPERATURE IS MILD TO MODERATELY
COLD
• MORE ECONOMICAL TO HEAT WITH FOSSIL
FUEL WHEN THE OUTDOOR TEMPERATURE IS
VERY COLD
• REDUCES DEMAND FOR POWER DURING
PERIODS OF COLD WEATHER
ECONOMIC BALANCE POINT
• OUTDOOR TEMPERATURE ASSOCIATED WITH
EQUAL OPERATING COSTS
ADD-ON HEAT PUMP KIT
TYPLUS103A
• SEQUENCE OF HEATING OPERATION
• NON-RESTRICTIVE MODE
– FIRST STAGE HEAT, HEAT PUMP (ONLY)
OPERATES IN HEATING, IF HEAT PUMP
CANNOT HANDLE THE LOAD , WHEN THE
TEMPERATURE IN ROOM DROPS APPROX. 11/2F, FURTHER, SECOND STAGE HEAT IS
CALLED FOR. SECOND STAGE TURNS THE
HEAT PUMP OFF AND BRINGS THE FURNACE
ON. FURNACE WILL SATISFY SECOND STAGE
ONLY. FIRST STAGE IF CALLING WILL
OPERATE AFTER 45 SEC. DELAY
– THERMOSTAT EMERGENCY HEAT POSITION
OPERATES FURNACE ONLY
ADD-ON HEAT PUMP KIT
TYPLUS103A
• SEQUENCE OF HEATING OPERATION
RESTRICTIVE MODE - ( REQUIRES TAYSTAT250A )
– O.D.T. CHANGEOVER AT OR ABOVE
ECONOMIC BALANCE POINT
– TEMPERATURES ABOVE O.D.T.,HEAT PUMP
ONLY,WHEN CALLED BY FIRST STAGE STAT.
– TEMPERATURES BELOW O.D.T.,FIRST STAGE
STAT. GOES TO THE FURNACE AND HEAT
PUMP IS CUT OFF
– EMERGENCY HEAT POSITION CONVERTS
SYSTEM TO FURNACE ONLY OPERATION
“A” COIL UPFLOW
APPLICATION
AIR FLOW
SUPPLY DUCT
CLASS 2 LOW VOLTAGE
WIRING TO SYSTEM
CONTROLLER
COIL ENCLOSURE
NOTE 1
BONNET THERMOSTAT
“A” COIL
FRONT COIL BAFFLE
UPFLOW
FURNACE
NOTE:
1. MOUNT BONNET THERMOSTAT
THROUGH FRONT COIL BAFFLE AT
THE HIGHEST PRACTICAL POINT
INSIDE THE ‘A’ COIL SO THE
SENSING ELEMENT DOES NOT
TOUCH EITHER SLAB OF COIL OR
INTERFERE WITH TUBING.
ROOM THERMOSTAT
T O R W Y B X2 G
INTER-COMPONENT WIRING
24 V.
FACTORY
LINE V. WIRING
24 V.
W3
FIELD
Y3
X3
LINE V. WIRING
G3
K1-3
FIELD INSTALLED
FACTORY WIRING
K1-2
K1
TDR
G1
HEAT PUMP
O.D. SECTION
BR
T
OR
O
FIELD WIRING
DIAGRAM FOR
SPLIT HEAT
PUMP SYSTEM
WITH
TAYPLUS103A
CONTROL IN
FURNACE
(UNRESTRICTED
MODE)
TDR - 1
Y2
K1-1
BR/X2 OR BK
X2
YL
Y
RD
R
BL
B
FURNACE
X2
BT
TAYPLUS103A Y1
B
G
W1
W1
W2
R
B
LEGEND
TDR - TIME DELAY RELAY
MODEL RLY1664
TO POWER
SUPPLY PER
LOCAL CODES
3 PH. ONLY
K
BT
- RELAY
MODEL RLY1663
- BONNET THERMOSTAT
MODEL THT1248
Y
TO POWER
SUPPLY PER
LOCAL CODES
3 PH. ONLY
ROOM THERMOSTAT
T O R W Y B X2 G
INTER-COMPONENT WIRING
24 V.
FACTORY
LINE V. WIRING
24 V.
W3
FIELD
Y3
X3
LINE V. WIRING
G3
K1-3
FIELD INSTALLED
FACTORY WIRING
K1-2
K1
TDR
G1
HEAT PUMP
O.D. SECTION
BR
T
OR
O
FIELD WIRING
DIAGRAM FOR
SPLIT HEAT
PUMP SYSTEM
WITH
TAYPLUS103A
CONTROL IN
FURNACE
(RESTRICTED
MODE)
TDR - 1
Y2
K1-1
BR/X2 OR BK
ODT
X2
YL
Y
RD
R
BL
B
FURNACE
X2
BT
TAYPLUS103A Y1
B
G
W1
W1
W2
R
B
LEGEND
TDR - TIME DELAY RELAY
MODEL RLY1664
TO POWER
SUPPLY PER
LOCAL CODES
3 PH. ONLY
K
BT
- RELAY
MODEL RLY1663
- BONNET THERMOSTAT
MODEL THT1248
Y
TO POWER
SUPPLY PER
LOCAL CODES
3 PH. ONLY
Mechanical problems that cause
electrical failures
• Failure of start components or compressor?
Compressor starting with liquid present!
• Overcharged unit.
• Crankcase heater circuit failure.
• Cycle rate too short, superheat never
stabilizing.
• Low supply voltage is the least common,
and most often assumed.
Things we need to get better at
• Gathering information from the consumer.
• Looking beyond the failure in front of us, why did it
fail. Shit does not just happen!
• Charging, letting the system run long enough to
stabilize. Taking subcooling and superheat.
• Remembering that over 50% of the electronic
controls replaced didn’t need to be replaced!
• Looking at the entire system, not just the compressor
section.
Start ups and Inspections
• Piping not shifted from shipping, check the
lines where they pass under the coil to be
free of the base pan.
• Check the air handler fan speed, name plate
charge is for the A.R.I. Match. Depending
on the match you have, the name plate
charge could be off by as much as 2 lbs.
• Does the contactor really need replaced?
The End!
Let’s take a short break then
we’ll take our heat pump quiz.