Honeywell W7750A specifications List of Figures, 74-2958

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER
List of Figures
Fig. 1. Typical system overview	6
Fig. 2. Typical W7750 control application	7
Fig. 3. Excel 10 W7750A Constant Volume AHU Controller	12
Fig. 4. W7750A construction in in. (mm)	13
Fig. 5. Excel 10 W7750B Constant Volume AHU Controller	14
Fig. 6. Excel 10 W7750C Constant Volume AHU Controller	15
Fig. 7. W7750B,C construction in in. (mm). W7750C (shown) has three 4 to 20 mA analog outputs.)	16
Fig. 8. DIN rail adapters	17
Fig. 9. Functional profile of LONMARK® RTU object details (variables not implemented in Excel 10 CVAHU
are greyed)	18
Fig. 10. T7770A,B,C,D construction in in. (mm)	20
Fig. 11. T7560A,B construction in in. (mm)	21
Fig. 12. C7770A construction in in. (mm)	21
Fig. 13. Fan with two stages of heating and two stages
of cooling	24
Fig. 14. Fan, modulating heating and modulating cooling	24
Fig. 15. Heat pump with two compressors and auxiliary heat stage(s)	25
Fig. 16. Economizer control	25
Fig. 17. Modulating heat with pneumatic valve actuator	26
Fig. 18. Connecting the portable operator terminal
to the LONWORKS® Bus	29
Fig. 19. Wiring layout for one doubly terminated daisy-chain LONWORKS® Bus segment	31
Fig. 20. Wiring layout for two singly terminated LONWORKS® Bus segments	32
Fig. 21. NEMA class 2 transformer voltage output limits	34
Fig. 22. Power wiring details for one Excel 10 per transformer	34
Fig. 23. Power wiring details for two or more Excel 10s per transformer	34
Fig. 24. Transformer power wiring details for one Excel 10 used in UL 1995 equipment (U.S. only)	35
Fig. 25. Attaching two or more wires at terminal blocks	36
Fig. 26. W7750B High-Side/Low-Side selectable switching and jumper location	36
Fig. 27. Typical W7750A Controller AHU application wiring diagram. (For more information on note 2,
refer to Fig. 25.)	38
Fig. 28. Typical W7750A Controller with separate transformer application wiring diagram.
(For more information on note 2, refer to Fig. 25.)	38
Fig. 29. W7750A Controller floating economizer damper wiring diagram. (For more information on note 2, refer to Fig. 25.)...	39

Fig. 30. Typical W7750B Controller with staged heating and cooling wiring diagram. (For more information on note 2, refer to Fig. 25.) .................................................................................................................................................................................... 40

Fig. 31. W7750B Controller with floating heating, cooling and economizer wiring diagram. (For more information on note 2, refer

to Fig. 25.)	40
Fig. 32. W7750B,C Controller PWM damper actuator wiring diagram. (For more information on note 2, refer to
Fig. 25.)	41

Fig. 33. W7750B,C wiring diagram with 4 to 20 mA enthalpy sensors and digital inputs. (For more information on note 2, refer to

Fig. 25.) 41

Fig. 34. W7750B,C wiring diagram with C7600C 4 to 20 mA solid state humidity sensor. (For more information on note 2, refer to

Fig. 25.) 42

Fig. 35. W7750C Controller with 4-to-20 mA heating, cooling and economizer wiring diagram. AOs must use terminals 16, 17 or

18. The AOs can be set to be reverse acting. (For more information on note 2, refer to Fig. 25.)		42
Fig. 36. Pneumatic transducer to W7750B,C
(B shown, see triangle note 4)		43
Fig. 37. RP7517,B pneumatic transducer to W7750C		43
Fig. 38. Typical doubly terminated daisy-chain LONWORKS® Bus segment termination module wiring diagram		44
Fig. 39. LONWORKS® Bus termination wiring options		45
Fig. 40. Temperature sensor resistance plots		49
Fig. 41. Location of the Service Pin Button		50
Fig. 42. LED location on W7750		51
Fig. 43. The T7770C,D Wall Modules LED and Bypass pushbutton locations		51
Fig. 44.	The T7560A,B Digital Wall Module Bypass pushbutton location	51
Fig. 45.	LED and Bypass pushbutton operation	56
Fig. 46.	Setpoint ramping parameters with ramp rate calculation	57
Fig. 47.	Setpoint ramping parameters with setpoint calculation	58

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