Space Pak SCM-036 User Manual

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Model SCM Air to Water Heat Pump — Installation, Operation & Maintenance Manual
Figure 3 SCM Fan Speed Control, Cooling
Figure 4 SCM Outdoor Reset, Cooling Figure 5 SCM Outdoor Reset, Heating
OFF
F05
OUTDOOR COIL SURFACE TEMPERATURE, °F
FAN STATUS
SCM LOW AMBIENT COOLING
ON
F06
r01
r19
r17 (<0 AS SHOWN)
r18
OUTDOOR AMBIENT TEMPERATURE, °F
WATER
T
EMPERATURE SP, °F
SOLSTICE OUTDOOR RESET, COOLING
r03
r20
r31 (<0 AS SHOWN)
r18
OUTDOOR AMBIENT TEMPERATURE, °F
WATER TEMPERATURE SP,
°F
S
O
L
S
T
I
CE
O
U
T
D
O
O
R RESE
T
, HEA
T
I
NG
Section 2: SCM Field Adjustable Parameters (continued)
If the fan control logic, parameter F02, is set to 02, the fans will
shut off if the outside coil surface temperature (as read by sensors
b03 & b07, whichever is greater) falls to the value established
by parameter F05 (75°F, factory default) and remain off until
the coil surface temperature rises above F05 plus F06 (75°F +
10°F=85°F, factory default) when the fans will turn on again.
If the cooling compensation constant, parameter r17, is set to a
value other than zero, the water temperature setpoint will be the
value established by parameter r01, (42°F factory default) until
the outdoor ambient temperature rises to the value of parameter
r19 (85°F factory default). Then, as the outdoor temperature
continues to increase, the water temperature setpoint will
change (increase if r17 is greater than zero, decrease if r17
is less than zero) by the ratio of change in water temperature
setpoint to change in ambient temp. For example, if r17 is
set to a value of -.5, the setpoint will decrease by 0.5°F for
every 1.0°F increase in outdoor ambient temperature. This will
continue, until the difference between the new setpoint and the
original setpoints matches the value established by parameter
r18 (8.0°F factory default), So the nal setpoint (42°F - 8°F=34°F
factory default) will remain xed even if the ambient temperature
continues to rise.
If r17 is set to zero, the water temperature setpoint will remain
xed at the value established by parameter r01 through the
entire range of cooling operation.
If the heating compensation constant, parameter r31, is set to a
value other than zero, the water temperature setpoint will be the
value established by parameter r03, (120°F factory default) until
the outdoor ambient temperature falls to the value of parameter
r20 (30°F factory default). Then, as the outdoor temperature
continues to fall, the water temperature setpoint will change
(decrease if r31 is greater than zero, increase if r31 is less than
zero) by the ratio of change in water temperature setpoint to
change in ambient temp. For example, if r31 is set to a value of
-.5, the setpoint will increase by 0.5°F for every 1.0°F decrease
in outdoor ambient temperature. This will continue, until the
difference between the new setpoint and the original setpoints
matches the value established by parameter r18 (8.0°F factory
default), So the nal setpoint (120°F + 8°F=128°F factory default)
will remain xed even if the ambient temperature continues to fall.
If r31 is set to zero, the water temperature setpoint will remain
xed at the value established by parameter r03 through the
entire range of heating operation.

Space Pak SCM-036 Specifications

General

Brand	Space Pak
Model	SCM-036
Category	Heat Pump
Language	English