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