TAYPLUS 103 A For Furnace With Addon Heat

TAYPLUS 103 A For Furnace With Add-on Heat Pump (Heat Pump Heating with Fossil Fuel supplemental Heat)

Objectives • Understand application of heat pump with furnace. • Understand wiring and operation of TAYPLUS 103 A accessory with furnace and heat pump. • Become familiar with trouble shooting procedures in this application.

WHY DUAL FUEL? • Best of both worlds – Heat Pump • High Efficiency above balance point. • High Capacity above balance point. – Gas Furnace • Longer operating cycles at lower outdoor temp. . – Fewer start ups = less stack loss – Fewer start ups = better comfort level • Economy at lower outdoor temperatures

Equipment Selection • Heat Gain / Heat Loss Calculation must be done for any heat pump application. Even more important for “dual fuel” application. • Size heat pump to Cooling Load. Industry guidelines allow 1. 25 multiplier. • Size furnace (output) to calculated heat loss. Furnace blower capacity must equal or exceed heat pump airflow requirement.

Plotting Heat Loss Calculation After calculating the heat loss of the structure plotting the heat loss allows you to determine several things. – Operating balance point or switch over point – heat loss at various outdoor temperatures – approximate heating capacity at various outdoor temperatures

Plotting Heat Loss Calculation This can be done on a preprinted curve sheet* or done on graph paper 80 70 Btu/h Heat Loss 5 K increments 60 50 40 30 20 10 0 3. 5 3 2. 5 unit size 2 1. 5 20 10 20 30 40 50 Outdoor Temperature 60 65 * Pub 34 -4024 -1

Plotting Heat Loss Calculation Step 1. mark calculated loss and design temperature Example: 15 of design, 47 MBtu/h Loss 80 70 Btu/h Heat Loss 5 K increments 60 50 40 30 20 10 0 3. 5 3 2. 5 unit size 2 1. 5 20 10 20 30 40 50 Outdoor Temperature 60 65

Plotting Heat Loss Calculation Step 2. Draw line from design point to 65 of 80 70 Btu/h Heat Loss 5 K increments 60 50 40 30 20 10 0 Example: 15 of design, 47 MBtu/h Loss, Cooling load 26. 8 MBtu 3. 5 3 2. 5 unit size 2 1. 5 20 10 20 30 40 50 Outdoor Temperature 60 65

OPTIONS • Bonnet T’stat – If supply air temperatures 150 of or > • Unrestricted Mode Indoor Thermostat fully controls operation • Restricted Mode Outdoor thermostat limits 2 nd stage

Indoor Thermostat T O R W (Electro-mechanical T’stat only. ) Anticipator circuit Y B X 2 G Fan ON output Switch Over Valve output (for cooling) 24 Volts hot Second Stage, Heating output Emergency heat output 24 Volts common First Stage, Heat or Cool output

Indoor Thermostat Use Heat Pump Thermostat – Electro-mechanical – Programmable

Relative Line Sizes in following drawings Inactive lines Field wiring Factory wiring Active lines Field wiring Factory wiring

Bonnet Thermostat Option T O R W Y B X 2 G W 3 X 3 Y 3 G 3 K 1 -3 Heat Pump OD section K 1 BR T OR O BR/X 2 or BK X 2 YL Y RD R BL B Y 2 K 1 -2 TDR G 1 ** BT TDR-1 FURNACE G W 1 W 2 * R K 1 -1 B X 2 Y Y 1 B W 1 * Two stage furnace w/ 2 stage control **Required if Furnace supply air is >150 of. Limits air temperature over indoor coil. BT = THT 1248

UN-RESTRICTED MODE STAND BY T O R W Y B X 2 G Room T’stat TAYPLUS 103 A W 3 G 3 X 3 Y 3 K 1 -3 Heat Pump OD section BR OR BR/X 2 or BK K 1 X 2 YL Y RD R BL B TDR FURNACE G W 1 T O G 1 K 1 -2 TDR-1 W 2 Y 2 * R K 1 -1 B X 2 Y Y 1 B W 1 * Two stage furnace w/ 2 stage control

UN-RESTRICTED MODE Call for Cooling T O R W Y B X 2 G W 3 X 3 Y 3 G 3 K 1 -3 Heat Pump OD section BR OR BR/X 2 or BK K 1 X 2 YL Y RD R BL B G 1 FURNACE G TDR W 1 T O K 1 -2 TDR-1 W 2 Y 2 R K 1 -1 B X 2 Y Y 1 B W 1

UN-RESTRICTED MODE Call for 1 st Stage Heat T O R W Y B X 2 G W 3 X 3 Y 3 G 3 K 1 -3 Heat Pump OD section BR OR BR/X 2 or BK K 1 X 2 YL Y RD R BL B G 1 FURNACE G TDR W 1 T O K 1 -2 TDR-1 W 2 Y 2 R K 1 -1 B X 2 Y Y 1 B W 1

UN-RESTRICTED MODE Defrost / 1 st Stage Heat T O R W Y B X 2 G W 3 X 3 Y 3 G 3 K 1 -3 Heat Pump OD section BR OR BR/X 2 or BK K 1 X 2 YL Y RD R BL B G 1 FURNACE G TDR W 1 T O K 1 -2 TDR-1 W 2 Y 2 R K 1 -1 B X 2 Y Y 1 B W 1

UN-RESTRICTED MODE Call for 2 nd Stage Heat T O R W Y B X 2 G W 3 X 3 Y 3 G 3 K 1 -3 Heat Pump OD section BR OR BR/X 2 or BK K 1 X 2 YL Y RD R BL B FURNACE G TDR W 1 T O K 1 -2 G 1 TDR-1 * W 2 Y 2 R K 1 -1 B X 2 Y Y 1 B W 1 *American Standard Furnace, furnace control operates fan. If furnaces needs “G” for fan, place jumper G 3 to G 1 (Note 5)

UN-RESTRICTED MODE Switched to Emerg. Heat, Call for 1 st Stage Heat T O R W Y B X 2 G W 3 X 3 Y 3 G 3 K 1 -3 Heat Pump OD section BR OR BR/X 2 or BK K 1 X 2 YL Y RD R BL B G 1 FURNACE G TDR W 1 T O K 1 -2 TDR-1 W 2 Y 2 R K 1 -1 B X 2 Y Y 1 B W 1

RESTRICTED MODE “Why would I want to restrict it ? ” Forces Heat Pump to run to preset outdoor temp. – Balance point or – Economic balance point Can be overridden by selecting Emergency Heat.

Restricted Mode Previous Schematic T O R W Y W 3 BR OR K 1 -3 BR/X 2 or BK YL Y RD R BL B TDR FURNACE G W 1 T X 2 G 1 K 1 -2 K 1 O G 3 X 3 Y 3 ODT Added ** Heat Pump OD section B X 2 G TDR-1 W 2 Y 2 * R K 1 -1 B X 2 Y Y 1 B W 1 1 2 3 **TAYTSAT 250 A * Two stage furnace w/ 2 stage control

Restricted Mode Current Schematic T O R W Y B X 2 G Relay Requirment Added ** W 3 K 1 -3 Heat Pump OD section BR 1 O TDR-1 W 2 Y 2 BR/X 2 or BK 4 X 2 YL Y RD R BL B * R 6 5 G W 1 T 2 G 1 K 1 -2 K 1 OR 3 G 3 X 3 Y 3 K 1 -1 B X 2 Y Y 1 B W 1 1 2 3 **RLY 0975 + TAYTSAT 250 A * Two stage furnace w/ 2 stage control

Current Restricted Mode Call for Cooling T O R W Y W 3 K 1 -3 BR 1 O TDR-1 W 2 Y 2 R 6 BR/X 2 or BK 4 X 2 YL Y RD R BL B 1 2 3 G W 1 T 2 G 1 K 1 -2 K 1 OR 5 G 3 X 3 Y 3 Heat Pump OD section 3 B X 2 G K 1 -1 B X 2 Y Y 1 B W 1

Current Restricted Mode 1 st Stage Heat T O R W Y W 3 K 1 -3 BR 1 O TDR-1 W 2 Y 2 R 6 BR/X 2 or BK 4 X 2 YL Y RD R BL B 1 2 3 G W 1 T 2 G 1 K 1 -2 K 1 OR 5 G 3 X 3 Y 3 Heat Pump OD section 3 B X 2 G K 1 -1 B X 2 Y Y 1 B W 1

Current Restricted Mode Defrost /1 st Stage Heat T O R W Y W 3 K 1 -3 BR 1 O TDR-1 W 2 Y 2 R 6 BR/X 2 or BK 4 X 2 YL Y RD R BL B 1 2 3 G W 1 T 2 G 1 K 1 -2 K 1 OR 5 G 3 X 3 Y 3 Heat Pump OD section 3 B X 2 G K 1 -1 B X 2 Y Y 1 B W 1

Current Restricted Mode 2 nd Stage Heat T O R W Y W 3 K 1 -3 BR 1 O TDR-1 W 2 Y 2 R 6 BR/X 2 or BK 4 X 2 YL Y RD R BL B 1 2 3 G W 1 T 2 G 1 K 1 -2 K 1 OR 5 G 3 X 3 Y 3 Heat Pump OD section 3 B X 2 G K 1 -1 B X 2 Y Y 1 B W 1

Current Restricted Mode Emergency Heat T O R W Y W 3 K 1 -3 BR 1 O TDR-1 W 2 Y 2 R 6 BR/X 2 or BK 4 X 2 YL Y RD R BL B 1 2 3 G W 1 T 2 G 1 K 1 -2 K 1 OR 5 G 3 X 3 Y 3 Heat Pump OD section 3 B X 2 G K 1 -1 B X 2 Y Y 1 B W 1

Current Restricted Mode Furnace locked out above ODT Setpoint** Do not attach wire at W or ODT term 1 T O R W Y W 3 K 1 -3 BR TDR-1 W 2 Y 2 O 4 X 2 YL Y RD R BL B * R 6 BR/X 2 or BK G W 1 T 2 1 G 1 K 1 -2 K 1 OR 5 G 3 X 3 Y 3 Heat Pump OD section 3 B X 2 G K 1 -1 B X 2 Y Y 1 B W 1 1 2 3 **Note 8 of instructions * Two stage furnace w/ 2 stage control

Furnace locked out above ODT Setpoint** Outdoor temp drops below ODT Setpoint T O R W Y W 3 K 1 -3 BR TDR-1 W 2 Y 2 O 4 X 2 YL Y RD R BL B * R 6 BR/X 2 or BK G W 1 T 2 1 G 1 K 1 -2 K 1 OR 5 G 3 X 3 Y 3 Heat Pump OD section 3 B X 2 G K 1 -1 B X 2 Y Y 1 B W 1 1 2 3 **Note 8 of instructions * Two stage furnace w/ 2 stage control