Orion System Water Source Heat Pump X Module - Manual (Page 18)

WSHP-X Module
Technical Guide 18
Sequence of Operation
Stand-Alone Input Commands
Compressor On/Off
A 24 volt signal to Binary Inputs #1-4 initiates each Compressor’s On
function. The source for this signal would typically come from Y1 to
Y4 calls from the thermostat.
Heat Enable On/Off
A 24 volt signal on this input indicates the unit is in the Heating Mode.
Typically, the source for this signal is the “O” call from the thermo-
stat.
Water Proof of Flow System On/Off
A 24 volt signal to Binary Inputs #6-7 indicates Water Proof of Flow
for each system.
Suction Pressure Analog Inputs
Sensors from Analog Inputs #1-4 correlate with the Suction Pressure of
each Compressor (250 PSI).
Leaving Water Temperature Thermistor Inputs
T1 correlates with Compressors A1 & A2 (RLY1 and RLY2). T2 cor-
relates with Compressors B1 & B2 (RLY3 and RLY4).
Input Commands (VCM-X WSHP or SA
Connection)
NOTE: When the term “ON” is used, it means there is either 24
VAC on the appropriate Binary Input or a call-to-run
signal is being received from the VCM-X WSHP Series
or SA Series Controller. When the term “OFF” is used,
it means there is either 0 VAC on the appropriate Binary
Input or the call-to-run signal from the VCM-X WSHP
or SA has been removed.
Compressor On/Off
Instead of a physical input signaling the Compressor On/Off function,
the VCM-X WSHP Series Controller or SA Series Controller commu-
nications drives the Compressor On/Off function.
Heat Enable On/Off
As with the Compressor On/Off function, the VCM-X WSHP Series or
SA Series Controller communicates to the Module that it is in Heat Mode.
Table 4: Factory-Set Default Setpoints - Glycol
Glycol Default Setpoints
Description
R22
0%
Glycol
R410-A
0%
Glycol
R410-A
5%
Glycol
R410-A
10%
Glycol
R410-A
15%
Glycol
R410-A
20%
Glycol
R410-A
25%
Glycol
R410-A
30%
Glycol
R410-A
35%
Glycol
R410-A
40%
Glycol
UNSAFE
SUCTION
20 PSIG 40 PSIG 40 PSIG 40 PSIG 40 PSIG 40 PSIG 40 PSIG 40 PSIG 40 PSIG 40 PSIG
LOW SUCTION
HEAT MODE
57 PSIG 100 PSIG 93 PSIG 87 PSIG 82 PSIG 75 PSIG 65 PSIG 58 PSIG 49 PSIG 45 PSIG
LOW SUCTION
COOL MODE
57 PSIG 87 PSIG 85 PSIG 85 PSIG 85 PSIG 85 PSIG 85 PSIG 85 PSIG 85 PSIG 85 PSIG
LOW LEAVING
WATER TEMP
37ºF 37ºF 34ºF 30ºF 27ºF 20ºF 15ºF 9ºF 2ºF 0ºF
Revised: 6/13/13