Two Stage Heat Pump With Economizer Differential Enthalpy Changeover And Temperature Limit - Honeywell LCBS Applications Manual

LCBS CONNECT SOLUTION
10. Two Stage Heat Pump with Economizer Differential Enthalpy
Changeover and Temperature Limit
TWO STAGE HEAT PUMP TWO STAGE AUXILIARY HEAT ECONOMIZER DIFFERENTIAL ENTHALPY
BUILDING NAME
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
LCBS
CONTROLLER
1 2 3 4 5 6 7 8
24 VAC
SYLK BUS
CONTROLLER
POWER
LCBS
CONTROLLER
WALL
MODULE
LCBS CONNECT – INFORMATION
THIS APPLICATION PROVIDES AUTOMATIC CONTROL OF AN AIR TO AIR HEAT PUMP AND INTEGRATED
ECONOMIZER WITH DIFFERENTIAL ENTHALPY CONTROL AND HIGH TEMPERATURE LIMIT (SEE APP
GUIDE FOR DETAILED SEQUENCE). REVERSING VALVE IS ENERGIZED IN COOLING MODE AND INITIATES
COOLING CYCLE BASED ON 24 VAC SUPPLIED CONFIGURER HAS THE OPTION TO RUN THE HEAT PUMP
IN A "COMFORT MODE" OR "SAVINGS MODE." THE NORMAL MODE WILL OPERATE THE HEAT PUMP
AUXILIARY HEAT BASED ON CONFIGURER SELECTED HEATING SETPOINT. IN THE "SAVINGS MODE"
THE HEATING SETPOINT IS DEPRESSED SO THAT ELECTRIC, AUXILIARY HEAT OPERATES LESS
FREQUENTLY. REFER TO APPLICATION GUIDE TO REFERENCE SETUP, SETBACK OPERATION AS WELL
AS ADAPTIVE INTELLIGENT RECOVERY OPERATION. SYSTEM SUPPLY FAN AUTOMATICALLY OPERATES
IN A CONTINUOUS MANNER DURING OCCUPIED PERIODS AND CYCLES ON A CALL FOR COOLING
DURING UNOCCUIPED PERIODS TO MEET THE NEED OF PREVAILING BUILDING CODES.
31-00118EFS—01
CVAHU RTU NAME
9 10 11 12 13 14 15 16 17 18 19 20
38
DATE
M7215A
ECONOMIZER
C7250A
ACTUATOR
MA SENSOR
C7250A
OA SENSOR
C7250A
DA SENSOR
C7400S SYLK OUTSIDE
AIR ENTHALPY SENSOR
C7400S SYLK RETURN
AIR ENTHALPY SENSOR
COOL 1
COOL 2
REV VALVE O REV VALVE O
FAN FAN
AUX HEAT 1 AUX HEAT
AUX HEAT 2
LCBS CONNECT – COMPONENTS SHOWN
OS# DESCRIPTION
YCRL6438SR LCBS CONTROLLER (WITH WALL MODULE)
C7250A MIXED AIR SENSOR
C7250A DISCHARGE AIR SENSOR
C7400S RETURN AIR ENTHALPY SENSOR
C7400S OUTDOOR AIR ENTHALPY SENSOR
M7215A ECONOMIZER ACTUATOR
AT40 TRANSFORMER(S)
ACTUATOR
24 VAC
POWER
HVAC SYSTEM
24 VAC POWER
EXISTING
TRANSFORMER
MCR36717