Carrier WEATHERMASTER 48Z030, Operation And Service Manual

Page: 47 / 180

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Table 35 — Setpoints
Table 36 — Supply Air Reset Configuration
Table 37 — Cooling Configuration
CSB A2 Feedback Alarm ( CS.A2 ) — This configuration is
used to enable or disable the compressor A2 feedback alarm
(105 ton size units only). This configuration must be enabled at
all times for 105 ton units.
CSB B1 Feedback Alarm (
CS.B1 ) — This configuration is
used to enable or disable the compressor B1 feedback alarm
(105 ton size units only). This configuration must be enabled at
all times for 105 ton units.
CSB B2 Feedback Alarm (
CS.B2 ) — This configuration is
used to enable or disable the compressor B2 feedback alarm
(105 ton size units only). This configuration must be enabled at
all times for 105 ton units.
Compressor A1 High Pressure Switch Trip (
HPS.A ) — This
configuration is used when high-pressure switches are used.
This is true for all units except the 105 ton size units which
incorporate current sensor boards (CSB). In the case of a high-
pressure switch trip on compressor A1, the control will sample
the discharge pressure on circuit A and store this value minus
3 psig and attempt to catch this failure the next time before the
switch trips. The value is modifiable by the user but will still
get overriden if the control does not catch a high pressure
condition before the switch trips.
Compressor B1 High Pressure Switch Trip (
HPS.B ) — This
configuration is used when high-pressure switches are used.
This is true for all units except the 105 ton size units which
incorporate current sensor boards (CSB). In the case of a
high-pressure switch trip on compressor B1, the control will
sample the discharge pressure on circuit B and store this value
minus 3 psig and attempt to catch this failure the next time
before the switch trips. The value is modifiable by the user but
will still get overriden if the control does not catch a high
pressure condition before the switch trips.
High SST Alert Delay Time (
H.SST ) — This option allows
the low saturated suction temperature alert timing delay to be
adjusted.
COOL MODE SELECTION PROCESS — The Z Series
Comfort Link™ controls offer three distinct methods by which
they may select a cooling mode.
1. Thermostat ( C.TYP =3 and 4): The thermostat does not
depend upon the state of occupancy or temperature and
the modes are called out directly by the discrete inputs
( Inputs
→
STAT
→
Y1 and Y2 ).
2. VAV cooling types ( C.TYP =1 and 2) are called out
in the occupied period ( O perating Modes
→
MODE
→
OCC =ON).
3. VAV cooling types ( C.TYP =1 and 2) are called out in the
unoccupied period ( Operating Modes
→
MODE
→
OCC =OFF). They are also used for space sensor control
types ( C.TYP =5 and 6) in both the occupied and unoccu-
pied periods.
This section is devoted to the process of cooling mode
determination for the three types outlined above.
ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT
OHSP Occupied Heat Setpoint 40-99 dF OHSP 68
OCSP Occupied Cool Setpoint 40-99 dF OCSP 75
UHSP Unoccupied Heat Setpoint 40-99 dF UHSP 55
UCSP Unoccupied Cool Setpoint 40-110 dF UCSP 90
GAP Heat-Cool Setpoint Gap 2-10 deltaF HCSP_GAP 5
V.C.ON VAV Occ. Cool On Delta 0-25 deltaF VAVOCON 3.5
V.C.OF VAV Occ. Cool Off Delta 1-25 deltaF VAVOCOFF 2
SASP Supply Air Setpoint 45-75 dF SASP 55
SA.HI Supply Air Setpoint Hi 45-75 dF SASP_HI 55
SA.LO Supply Air Setpoint Lo 45-75 dF SASP_LO 60
SA.HT Heating Supply Air Setpt 90-145 dF SASPHEAT 85
T.PRG Tempering Purge SASP –20-80 dF TEMPPURG 50
T.CL Tempering in Cool SASP 5-75 dF TEMPCOOL 5
T.V.OC Tempering Vent Occ SASP –20-80 dF TEMPVOCC 65
T.V.UN Tempering Vent Unocc. SASP –20-80 dF TEMPVUNC 50
ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT
EDT.R EVAP.DISCHRGE TEMP RESET
RS.CF EDT Reset Configuration 0 - 3 EDRSTCFG 2
RTIO Reset Ratio 0 - 10 RTIO 2
LIMT Reset Limit 0 - 20 deltaF LIMT 10
RES.S EDT 4-20 ma Reset Input Enable/Disable EDTRSENS Disable
ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT
COOL COOLING CONFIGURATION
Z.GN Capacity Threshold Adjst –10 - 10 Z_GAIN 1
MC.LO Compressor Lockout Temp –25 - 55 dF OATLCOMP 40
L.L.EN Lead/Lag Operation ? Yes/No LLENABLE No
M.M. Motor Master Control ? Yes/No MOTRMAST No
HPSP Head Pressure Setpoint 80 - 150 dF HPSP 113
A1.EN Enable Compressor A1 Enable/Disable CMPA1ENA Enable
A2.EN Enable Compressor A2 Enable/Disable CMPA2ENA Enable
B1.EN Enable Compressor B1 Enable/Disable CMPB1ENA Enable
B2.EN Enable Compressor B2 Enable/Disable CMPB2ENA Enable
CS.A1 CSB A1 Feedback Alarm Enable/Disable CSB_A1EN Enable
CS.A2 CSB A2 Feedback Alarm Enable/Disable CSB_A2EN Enable
CS.B1 CSB B1 Feedback Alarm Enable/Disable CSB_B1EN Enable
CS.B2 CSB B2 Feedback Alarm Enable/Disable CSB_B2EN Enable
HPS.A CMPA1 Hi.Pr.Sw. Trip 365 - 415 PSIG HPSATRIP 415
HPS.B CMPB1 Hi.Pr.Sw. Trip 365 - 415 PSIG HPSBTRIP 415
H.SST Hi SST Alert Delay Time 5 - 30 min HSSTTIME 10