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90
Table 77 — Discharge Pressure
Transducer Pressure (psig) vs Voltage
Forcing Inputs and Outputs —
Many of variables
may be forced both from the CCN and directly at the local
display. This can be useful during diagnostic testing and also
during operation, typically as part of an advanced third party
control scheme. Please see Appendix A and B.
NOTE: In the case of a power reset, any force levels in effect
at the time of the power reset will be cleared.
CONTROL LEVEL FORCING — If any of the following
points are forced with a priority level of 7 (consult CCN litera-
ture for a description of priority levels), the software clears the
force from the point if it has not been written to or forced again
within the timeout periods defined below:
Run Status Menu —
The Run Status menu provides the
user important information about the unit. The Run Status table
can be used to troubleshoot problems and to help determine
how and why the unit is operating.
AUTO VIEW OF RUN STATUS — The Auto View of Run
Status display table provides the most important unit informa-
tion. The HVAC Mode (
Run Status
→
VIEW
→
HVAC
) in-
forms the user what HVAC mode the unit is currently in. Refer
to the Modes section on page 40 for information on HVAC
modes. The occupied status, unit temperatures, unit set points,
and stage information can also be shown. See Table 78.
Run Status
→
VIEW
→
HVAC
— Displays the current HVAC
Mode(s) by name. HVAC Modes include:
OFF
VENT
HIGH HEAT
STARTING UP
HIGH COOL
FIRE SHUT DOWN
SHUTTING DOWN
LOW COOL
PRESSURIZATION
DISABLED
UNOCC FREE COOL EVACUATION
SOFTSTOP REQUEST TEMPERING HICOOL SMOKE PURGE
REM SW DISABLE
TEMPERING LOCOOLDEHUMIDIFICATION
COMP STUCK ON
TEMPERING VENT
RE-HEAT
TEST
LOW HEAT
Run Status
→
VIEW
→
OCC
— Displays the current occupan-
cy status of the control.
Run Status
→
VIEW
→
MAT
— Displays the current value for
mixed-air temperature. This value is calculated based on
return-air and outside-air temperatures and economizer damper
position.
Run Status
→
VIEW
→
EDT
— Displays the current evapora-
tor discharge air temperature during Cooling modes. This value
is read at the supply air thermistor location (or at cooling coil
thermistor array if unit is equipped with hydronic heating coil).
Run Status
→
VIEW
→
LAT
— Displays the current leaving-
air temperature during Vent and Hydronic Heating modes. This
value is read at the supply air thermistor location.
Run Status
→
VIEW
→
EC.C.P
— Displays the current econo-
mizer control point value (a target value for air temperature
leaving the evaporator coil location).
Run Status
→
VIEW
→
ECN.P
— Displays the current actual
economizer position (in percentage open).
Run Status
→
VIEW
→
EC2.P
— Displays the current posi-
tion of actuator no. 2 (in percentage open).
Run Status
→
VIEW
→
CL.C.P
— Displays the current cool-
ing control point (a target value for air temperature leaving the
evaporator coil location).
Run Status
→
VIEW
→
C.CAP
— Displays the current
amount of unit cooling capacity (in percent of maximum).
Compare to staging tables in Appendix C.
Run Status
→
VIEW
→
CL.ST
— Displays the current number
of requested cooling stages. Compare to staging tables in
Appendix C and to
C.CAP
above.
Run Status
→
VIEW
→
HT.C.P
— Displays the current heat-
ing control point, for use with staged gas control option only (a
target value for air temperature leaving the supply duct).
Run Status
→
VIEW
→
HT.ST
— Displays the current number
of heating stages active (for staged gas control option only).
Compare to following point.
Run Status
→
VIEW
→
H.MAX
— Displays the maximum
number of heat stages available for this model.
PRESSURE
(psig)
VOLTAGE DROP
(v)
0
0.466
10
0.564
20
0.663
30
0.761
40
0.860
50
0.958
60
1.056
70
1.155
80
1.253
90
1.352
100
1.450
110
1.549
120
1.647
130
1.745
140
1.844
150
1.942
160
2.041
170
2.139
180
2.238
190
2.336
200
2.434
210
2.533
220
2.631
230
2.730
240
2.828
250
2.927
260
3.025
270
3.124
280
3.222
290
3.320
300
3.419
310
3.517
320
3.616
330
3.714
340
3.813
350
3.911
360
4.009
370
4.108
380
4.206
390
4.305
400
4.403
410
4.502
420
4.600
Temperatures
→
AIR.T
→
OAT
Outside Air Temperature
30 minutes
Temperatures
→
AIR.T
→
RAT
Return Air Temperature
3 minutes
Temperatures
→
AIR.T
→
SPT
Space Temperature
3 minutes
Inputs
→
RSET
→
SP.RS
Static Pressure Reset
30 minutes
Inputs
→
REL.H
→
OA.RH
Outside Air Relative Humidity 30 minutes
Inputs
→
AIR.Q
→
OAQ
Outside Air Quality
30 minutes
Summary of Contents for WEATHERMASTER 48Z030
Page 103: ...103 Fig 15 Typical Power Schematic Sizes 030 050 Shown a48 8408 ...
Page 104: ...104 Fig 16 Main Base Board Input Output Connections a48 8409 ...
Page 105: ...105 Fig 17 RCB ECB CEM SCB Input Output Connections a48 8410 ...
Page 106: ...106 Fig 18 Typical Gas Heat Unit Control Wiring 48Z055 105 Units Shown a48 8411 ...
Page 107: ...107 Fig 19 Typical Electric Heat Unit Control Wiring 50Z055 105 Units Shown a50 8248 ...
Page 108: ...108 Fig 20 Typical Power Wiring 115 V 48Z Units a48 8412 ...
Page 109: ...109 Fig 21 Typical Power Wiring 115 V 50Z Units a50 8249 ...
Page 110: ...110 Fig 22 Typical Gas Heat Section Size 055 105 Units Shown a48 8413 ...
Page 111: ...111 Fig 23 Component Arrangement Size 030 050 Units ...
Page 112: ...112 Fig 24 Component Arrangement Size 055 070 Units ...
Page 113: ...113 Fig 25 Component Arrangement Size 075 105 Units ...