Carrier ComfortLink 6 Series Controls, Start-Up, Operation, Service, And Troubleshooting page 14

LEGEND
SCT — Saturated Condensing Temperature
Fig. 9A — 30GXN,R Units Head Pressure Control Without Motormaster
READ CIRCUIT
SATURATED
CONDENSING
TEMPERATURE
AND CURRENT
FAN STAGE
Fig. 9B — 30GXN,R Units Head Pressure Control With Motormaster V Control
CONTROL TYPE
(CTRL)
Switch
7 Day Occ
Occupancy
CCN
*Dual set point switch input used. CSP1 used when switch input is open. CSP2 used when switch input is closed.
†Cooling set point determined from 4 to 20 mA input to Energy Management Module (EMM) to terminals TB6-3,5.
30GXN,R UNITS — MOTORMASTER V CONTROL NOT INSTALLED
30GXN,R UNITS — MOTORMASTER V CONTROL INSTALLED
IS SCT GREATER
THAN HEAD
PRESSURE SET
POINT PLUS 15°F
(8.3°C)?
YES
INCREASE
CURRENT FAN
STAGE BY ONE
Table 8 — Control Methods and Cooling Set Points
OCCUPANCY
STATE
Single
Occupied ON,CSP1
Unoccupied ON,CSP1
Occupied ON,CSP1
Unoccupied OFF
Occupied ON,CSP1
Unoccupied OFF
Occupied ON,CSP1
Unoccupied ON,CSP1
CALCULATE NEW
NO
PID VALUE. DOES
OUTPUT REQUIRE
MORE FANS?
YES
INCREASE
CURRENT FAN
STAGE BY ONE
OUTPUT NEW mA
SIGNAL TO
CONTROLLER
COOLING SET POINT SELECT (CLSP)
Dual, Switch Dual, 7 day
ON* ON,CSP1
ON* ON,CSP2
ON*
OFF
ON*
OFF
ON* ON,CSP1
ON* ON,CSP2
14
®
V Control
DOES PID OUTPUT
NO
REQUIRE LESS
FANS?
YES
DECREASE
CURRENT FAN
STAGE BY ONE
Dual, CCN Occ
ON,CSP1
ON,CSP2
Illegal Illegal
Illegal Illegal
Illegal Illegal
Illegal Illegal
ON,CSP1
ON,CSP2
NO
4 to 20 mA†
ON
ON
ON
OFF
ON
OFF
ON
ON