HPB2 -65 A Division of Steffes Corporation OWNER'S & INSTALLER'S MANUAL for Electric Thermal Storage Heat Pump Boosters UL ® UL + ® LISTED Models: HPB11B, HPB15B, & HPB22B - Page 31 - U.S. Pat. # 5086493 Can. Pat.
Introduction to Steffes ETS. Dear Valued Customer: Congratulations On Your New Purchase! The Steffes ETS heaters are of the highest quality storage heat systems available today. We are confident you will be pleased with the warm, comfortable heat from this system as well as the savings you should see in your electric heat bill. Electric Thermal Storage has been used in the United States for over 20 years. Today, Steffes is known as the leader in this technology.
TABLE OF CONTENTS 1. 2. 3. 4. GENERAL INFORMATION ................................................................................................................................. 1 OPERATION ....................................................................................................................................................... 2 A. Control Sequence ...........................................................................................................................................
1. GENERAL INFORMATION Steffes ETS Heat Pump Boosters (HPB) operate on the principle of utilizing off-peak electricity, available at preferential rates, to heat the structures they serve. When off-peak rates are available (up to several hours each day), the HPB converts electricity to heat which is then stored in its ceramic brick core. This stored heat becomes available for space heating needs as determined by a room thermostat strategically located in the living space.
2. OPERATION A. CONTROL SEQUENCE •SPACE TEMPERATURE CONTROL In its primary application, supplementing the output of a heat pump, the HPB is normally installed closely adjacent to and downstream from the heat pump air handler. Installation ducting (see INSTALLATION section) allows the HPB to draw off a portion of the supply air leaving the heat pump air handler, heat this air as required, and return it to the supply duct downstream from the HPB.
•OUTDOOR AIR SENSOR OVERRIDES Manual Override Core charge levels are normally determined by the master controller's outdoor air temperature sensor. This unit comes equipped with a switch that can be used to override the outdoor air temperature sensor (See Figure 1). This override switch has three positions: AUTO, HIGH, LOW. -AUTO - core charging is controlled by the outdoor air temperature sensor (See Table 1).
C. HPB CONTROL DEVICES & SAFETY LIMIT DEVICES (TABLE 2) CATEGORY Control Devices: Safety Devices: DEVICE NAME LOCATION CONDITION MONITORED ACTION Outdoor Air Temperature Sensor Outside in a protected location providing representative outdoor air temperatures. (See Outdoor Sensor Placement in Installation Section) Outdoor Air Temperature Signals to the charge control system to set core charge level in relation to outdoor temperatures (SeeTable1).
D. HPB AIR DELIVERY CONTROL STRATEGY (TABLE 3) MODE STAGE 1 HEAT CALL STAGE 2 HEAT CALL (EMERGENCY HEAT) AIR CONDITIONING CALL On-peak without • HPB core blower energized. compressor control • Supply air temperature maintained at pre-set comfort level. • If core temperature is below the preset minimum temperature, HPB will not respond. • HPB core blower energized. • HPB air discharge temperature maintained at 160o F. • 130o low core temperature switch bypassed. • HPB core blower de-energized.
E. HPB CORE CHARGING CONTROL STRATEGY (TABLE 4) MODE STAGE 1 HEAT CALL STAGE 2 HEAT CALL (EMERGENCY HEAT) AIR CONDITIONING CALL On-peak without compressor control (above 45o F outdoor air temperature) No core charging. No core charging unless override activated, then Level 1 core charge. No provision for core charging. Off-peak without compressor control (above 45o F outdoor air temperature) No core charging. Core heating elements activated to provide Level 1 charge.
3. INSTALLATION A. SHIPPING Steffes ETS Heat Pump Boosters are shipped in modular fashion for ease of handling. (See Shipping Data Sheet in Appendix). Following delivery of the booster to its installation site, merely remove the packaging materials; and, the unit is ready for installation. B. UNIT PLACEMENT The weight of the unit must be taken into consideration when selecting the installation surface.
1. Lift carton off storage cabinet. (CAUTION: Do not install unit on its shipping pallet!) 2. Move unit to position and adjust leveling legs (23). (CAUTION: Leveling legs must not be extended more than one (1) inch.) 3. After the unit is set and leveled, brick loading may begin. (NOTE: Once bricks are loaded, the booster can no longer be moved.) 4. Remove sheet metal screws on the lower edge of the cabinet's painted front panel (33). 5. Pull painted front panel (33) out at bottom edge to detach. 6.
14. Replace stainless steel panel (2). 15. Lower insulation blankets (8, 9, and 10) back into position one at a time. Carefully tuck sides of blanket into edges, corners, and around exposed portion of heating elements (18). 16. Replace galvanized front cover (13) utilizing #8 X 1" sheet metal screws. 17. Replace painted front panel (23) using blunt tip screws only. BRICK LOADING AND ELEMENT/JUMPER CONNECTIONS (FIGURE 5) E.
MECHANICAL CONNECTION OVERVIEW (FIGURE 6) TYPICAL BOOSTER MECHANICAL CONNECTIONS (FIGURE 7) NOTES: 1. 2. Both inlet and outlets of the HPB unit must be connected to the supply side of the duct system. With a split take off duct system the warm air duct from the booster must be placed to ensure even discharge of heat to both sides of the duct system. (Warm air duct from HPB should be centered on the plenum.
DUCT AND UNIT DIMENSIONS (FIGURE 8) F. SENSOR PLACEMENT •DUCT SENSOR Booster performance and homeowner comfort is critically dependent upon proper placement of the supply air temperature duct sensor. For guidelines, refer to Figure 7.
CHARGE CONTROL CIRCUIT BOARD PANEL (FIGURE 9) G. FINAL TEST PROCEDURE TEST EQUIPMENT NEEDED: 1. Digital Volt-Ohm meter. 2. Clamp-on Amp meter. 1. Check all electrical connections for proper termination placement, and that they have been tightened properly. 2. Energize electrical circuits. (See Figure 9 for switch positions on steps 3, 4, and 5) 3.
4. APPENDIX A.
B. UNIT SPECIFICATIONS MODEL: HPB11B •MINIMUM CHARGING CIRCUIT SERVICE ENTRANCE PANEL •MAXIMUM BLOWER LOAD •CHARGING INPUT •kWh STORAGE •HEATING ELEMENTS •STORAGE BRICK (Magnetite) •APPROXIMATE INSTALLED WEIGHT •UNIT SIZE (Height-Length-Depth) •MAXIMUM DELIVERABLE kWh/24 HOURS 8 Hour Charge 12 Hour Charge 60 Amps (240V systems) (46 Amps x 1.25 = 57 Amps) 2 Amps (240V systems) 11.0 kW 75 kWh 6 - 1830W Incoloy Sheathed 861 LBS 1200 LBS 51" X 26.5" X 34.
- Page 15 - (FIGURE 10) C.
D. HPB PARTS LIST (NOTE: When ordering replacement parts, please include unit model number and serial number.) DWG. REF. NO. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. " " 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39.
D. HPB PARTS LIST (Continued) (NOTE: When ordering replacement parts, please include unit model number and serial number.) DWG. REF. NO. 40. 41. 42. 43. 44. 45. 46. 47. 48. 49. 50. 51. 52. 53. 54. 55. 56. 57. 58. 59. " 60. " " 61. 62.
E. TERMINAL DESIGNATION ON HEAT PUMP DEVICES FOR VARIOUS MANUFACTURERS (The small number coded as a superscript next to certain terminal connections refer to Terminal Designation Notes on the next page.
TERMINAL DESIGNATION NOTES (These numbered notes refer to the chart on the previous page.) 1. Some manufacturers have additional wires. If these extra wires do not effect on/off control of the compressor, blower, or electric elements, leave wires as is. Example: Carrier-P, GE-U & F, etc. 2. Bryant may also have a "W2" wire which would be the same "W1". 3. Common can be X, B, C, or V. 4.
F. ELECTRICAL CONNECTIONS Circuit breakers located in the line voltage compartment (lower right front side of unit) are set up for multi-feed installations (See Figures 12 and 13). For circuit sizing, see Unit Specifications in Appendix. If single feed is desired, order Steffes Single Feed Kit, Item #1309000. Due to different utility strategies, the fan control circuit can either be a separate feed or common to circuit breaker #1. HPB's are equipped with 3-speed blowers, factory wired for high speed.
UNIT LINE VOLTAGE WIRING DIAGRAM FOR THE HEAT PUMP BOOSTER MODEL HPB11B (FIGURE 12) UNIT LINE VOLTAGE WIRING DIAGRAM FOR THE HEAT PUMP BOOSTER MODEL HPB15B (FIGURE 13) NOTE: Use copper or aluminum conductors rated for 75C or higher for field connection of this device. Diagrams show high blower run speed. For low and medium speeds, see fan speed selections, Figure 11.
UNIT LINE VOLTAGE WIRING DIAGRAM FOR THE HEAT PUMP BOOSTER MODEL HPB22B (FIGURE 14) NOTE: Use copper or aluminum conductors rated for 75C or higher for field connection of this device. Diagrams show high blower run speed. For low and medium speeds, see fan speed selections, Figure 11.
UNIT LOW VOLTAGE WIRING DIAGRAM FOR THE MODEL HPB11B & HPB15B (FIGURE 15) NOTES: 1. 2. 3. 4. 5. Low voltage auxilliary control contacts. a. Y to Y2 contacts open when load control device closes. b. Y to Y3 contacts closed when load control device closes. Auxilliary contacts close during off-peak heat calls. N.O. used for open on-peak load control device (switch closes to charge). N.C. used for closed on-peak control device (switch opens to charge).
UNIT LOW VOLTAGE WIRING DIAGRAM FOR THE MODEL HPB22B (FIGURE 16) NOTES: 1. 2. 3. 4. 5. Low voltage auxilliary control contacts. a. Y to Y2 contacts open when load control device closes. b. Y to Y3 contacts closed when load control device closes. Auxilliary contacts close during off-peak heat calls. N.O. used for open on-peak load control device (switch closes to charge). N.C. used for closed on-peak control device (switch opens to charge).
FIELD LOW VOLTAGE CONTROL WIRING FOR HEAT PUMP APPLICATIONS (FIGURE 17) NOTE: See Installation Notes in this manual in conjunction with this diagram.
FIELD LOW VOLTAGE CONTROL WIRING FOR ELECTRIC FURNACE BACK-UP APPLICATIONS (FIGURE 18) NOTE: See Installation Notes in conjunction with this diagram.
FIELD LOW VOLTAGE CONTROL WIRING FOR STAND ALONE APPLICATIONS (Small Central Furnace) (FIGURE 19) ROO M 50 60 THE 70 RMO STAT 80 SEE CONFIGURATION NOTE #3 FIELD WIRE HEAT PUMP BOOSTER INTERFACE BOARD FIELD WIRE BLUE/WHITE BLUE TO LOAD MANAGEMENT CONTROLLER POSSIBLY RADIO RECEIVER, ELECTRIC METER, OR TIME CLOCK RETURN SEE CONFIGURATION NOTE #2 WHITE GREEN BLACK RED SUPPLY WHITE GREEN BLACK RED OPTIONAL FIELD INSTALLED DUCT SENSOR SEE CONFIGURATION NOTE #1 TO OUTDOOR SENSOR FIELD WIRE 12" F
INSTALLATION NOTES (See Figures 17, 18, and 19) NOTE 1: The letters in the heat pump thermostat may vary, but the function of the wires are normally the same. (See Terminal Designation on Heat Pump Devices for Various Manufacturers in the Appendix.) NOTE 2: This R MUST be connected to the transformer hot leg in the wall thermostat. Reversing the R&C terminals will cause improper operation. NOTE 3: The Y terminal must be connected to compressor control circuit from the wall thermostat in all installations.
G. CORE TEMPERATURE (oF) VS. MILLIVOLTS (DC) (FIGURE 20) 1800o 1600o Core Temperature (oF) 1400o 1200o 1000o 800o 600o 400o 200o 0 5 10 15 20 25 30 Millivolts (DC) (From Core Temperature Sensor, DWG Ref. No.
H. THEORY OF OPERATION (For units after serial/ARL number 00110) •OUTDOOR TEMPERATURE SENSING Core charging of the Steffes ETS Heat Pump Booster (HPB) is regulated by a Three-Stage Outdoor Air Temperature Sensor. The mercury bulbs of this sensor are normally calibrated at 45oF, 35oF, and 25oF. These temperatures are set points for charge levels 1, 2, and 3 respectively. (See Table 1). Optional temperature set points are available. The sensors will initiate core charging a drop in outdoor temperature.
STEFFES ETS LIMITED WARRANTY Steffes Corporation (Steffes) warrants that the Steffes ETS Electric Thermal Storage Heating Appliance is free from defects in materials and workmanship under normal use and service.
