Orion System Water Source Heat Pump Module Tulsa - Manual (Page 11)

Technical Guide
Water Source Heat Pump Module
11
Sequence of Operation
Table 2: Water Source Heat Pump Module Inputs &
Outputs
General
The following inputs and outputs are available on the Water Source Heat
Pump Module. See Table 2 below to reference the Input/Output Map.
Water Source Heat Pump Module
Setpoints
The Water Source Heat Pump Module setpoints are preset at AAON and
are based on the unit’s design as well as the type of coolant being used
in the water loop. See Tables 3 & 4 for default settings.
NOTE: These are default settings only. The setpoints may be
different based on the unit’s design and coolant being
used. The 6-digit R numbers in the tables are the AAON
part numbers located on the module’s label.
Binary Inputs
1 Compressor A1 Enable (BIN 1)
2 Compressor A2 Enable (BIN 2)
3 Compressor B1 Enable (BIN 3)
4 Compressor B2 Enable (BIN 4)
5 Heat Enable (BIN 5)
6 Water Proof of Flow System A (BIN 6)
7 Water Proof of Flow System B (BIN 7)
Analog Inputs
1 Suction Pressure A1 (Pres 1)
2 Suction Pressure A2 (Pres 2)
3 Suction Pressure B1 (Pres 3)
4 Suction Pressure B2 (Pres 4)
5 Leaving Water Temperature System A (T1)
6 Leaving Water Temperature System B (T2)
Analog Outputs (1-5 VDC)
1 Digital Stage 1 (Compressors A1 & B1) (AOUT1)
2 Digital Stage 2 (Compressors A2 & B2) (AOUT2)
NOTE: Analog Outputs are not used on Stand
Alone Application
Relay Outputs (24 VAC)
1 Compressor A1 Enable Output (RLY1)
2 Compressor A2 Enable Output (RLY2)
3 Compressor B1 Enable Output (RLY3)
4 Compressor B2 Enable Output (RLY4)
5 Alarm Output (RLY5)
Table 3: Factory-Set Default Setpoints - Water Only
Water-Only Default Setpoints
Description
R410-A
R88350
R22
R90680
UNSAFE SUCTION 40 PSIG 20 PSIG
LOW SUCTION HEAT MODE 100 PSIG 57 PSIG
LOW SUCTION COOL MODE 100 PSIG 57 PSIG
LOW LEAVING WATER TEMP 37ºF 37ºF
Table 4: Factory-Set Default Setpoints - Glycol
Glycol Default Setpoints
Description
R410-A
20%
Glycol
R99750
R410-A
25%
Glycol
R88351
R410-A
40%
Glycol
R99760
UNSAFE SUCTION 40 PSIG 40 PSIG 40 PSIG
LOW SUCTION HEAT
MODE
77 PSIG 65 PSIG 45 PSIG
LOW SUCTION COOL
MODE
85 PSIG 85 PSIG 85 PSIG
LOW LEAVING WATER
TEMP
23ºF 19ºF 0ºF