Controls Configuration and Calibration —
Be-
fore installing the transducers into the compressors, the con-
trols must be reconfigured and the transducers calibrated.
Proceed as follows:
1. Reconnect power to the rooftop unit.
2. Turn on the unit control circuit breaker (CCB).
3. Turn the ON/OFF switch located on the fuse/circuit breaker
bracket to the ON position.
4. Use the accessory HSIO keypad and display module (see
Fig. 9) to perform the following:
HSIO ENTRY
KEYPAD
DISPLAY
ACTION BEING
TAKEN
LOG ON
Enter login function
LOGGEDON Logging in
FACT CFG
Enter factory configuration
function
TYPE X
None at this time
AWTP 0
None at this time
SIZE X
None at this time
ULOP X
None at this time
HPSP 113
None at this time
HEAT X
None at this time
HTSG 2
None at this time
TRNS NO
None at this time
TRNS YES
Configure unit
USER CFG
Enter user configuration
function
HUSN X
None at this time
SUSN NO
None at this time
SUSN YES
Configure unit
FACT CFG
Enter factory configuration
function
SPB CALB
None at this time
SPA CALB
None at this time
DPB CALB
None at this time
DPA CALB
None at this time
DTRS NO
None at this time
DTRS YES
Reset processor
LEGEND
AWTP — Air/Water Type
HTSG — Number of Heat
DP
— Discharge Pressure
Stages
Sensor
SIZE
— Unit Size
DTRS — Data Reset
SP
— Suction Pressure
HEAT
— Heat Type
Sensor
HPSP — Head Pressure
SUSN — Suction Sensors
Set Point
TRNS — Transducers
HUSN — Humidity Sensors
ULOP — Number of Unloaders
After approximately 20 seconds, the HSIO keypad and dis-
play module will resume its normal rotating display indi-
cating that the reconfiguration is complete. After the HSIO
resumes its normal rotating display, perform the following:
HSIO ENTRY
KEYPAD
DISPLAY
ACTION BEING
TAKEN
LOG ON
Enter login function
LOGGEDON Logging in
FACT CFG
Enter factory configuration
function
SPB CALB
SPB CALB
Calibrate SPB transducer
SPA CALB
SPA CALB
Calibrate SPA transducer
DPB CALB
DPB CALB
Calibrate DPB transducer
DPA CALB
DPA CALB
Calibrate DPA transducer
DP — Discharge Pressure
SP — Suction Pressure
At this point, the unit configuration and transducer cali-
bration is complete. To ensure that the calibration was per-
formed properly and that the suction thermistors are reading
correctly, proceed to the following system temperature check:
HSIO ENTRY
KEYPAD
DISPLAY
READING NAME
(EXPECTED DISPLAY)
TEMPS
System temperatures
SCTA X
Saturated condensing temperature,
circuit A (−41 F)
STA X
Suction temperature, circuit A
(−41 F)
SSTA X
Saturated suction temperature, circuit
A (−41 F)
SHA X
Superheat, circuit A (STA-SSTA)
SCTB X
Saturated condensing temperature,
circuit B (−41 F)
STB X
Suction temperature, circuit B
(−41 F)
SSTB X
Saturated suction temperature, circuit
B (−41 F)
SHB X
Superheat, circuit B (STB-SSTB)
Fig. 9 — HSIO Display Module
9