56
There are up to four outputs provided to control head
pressure:
Outputs
FANS
CDF.1 — Condenser Fan Output 1
Outputs
FANS
CDF.2 — Condenser Fan Output 2
Outputs
FANS
CDF.3 — Condenser Fan Output 3
Outputs
FANS
CDF.4 — Condenser Fan Output 4
Outputs
FANS
CDF.5 — Condenser Fan Output 5
The specific staging sequence for a unit depends on the 3
factors: the unit size (tonnage), which refrigeration circuits are
currently operating, and whether or not MotorMaster is en-
abled. See Fig. 10-13 for fan staging sequencing.
The condenser fan output controls outdoor fan contactors
and outdoor fans for each unit tonnage as shown in Fig. 10.
Each stage of fans is also shown. The ComfortLink controller
adds or subtracts stages of fans based on SCT.H and SCT.L.
When the SCT rises above SCT.H, a fan stage will be added.
The ComfortLink controller will continue to add a fan stage ev-
ery 10 seconds thereafter if the SCT remains above SCT.H. If
SCT rises above 130 F, the controller will turn on the maxi-
mum fan stages for the unit. When the SCT drops below the
SCT.L, a fan stage will be subtracted. The ComfortLink con-
troller will continue to drop a fan stage every 2 minutes thereaf-
ter if the SCT remains below SCT.L.
Table 33 — Demand Limit Configuration
ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT
DMD.L DEMAND LIMIT CONFIG.
DM.L.S Demand Limit Select 0 - 3 DMD_CTRL 0
D.L.20 Demand Limit at 20 ma 0 - 100 % DMT20MA 100
SH.NM Loadshed Group Number 0 - 99 SHED_NUM 0
SH.DL Loadshed Demand Delta 0 - 60 % SHED_DEL 0
SH.TM Maximum Loadshed Time 0 - 120 min SHED_TIM 60
D.L.S1 Demand Limit Sw.1 Setpt. 0 - 100 % DLSWSP1 80
D.L.S2 Demand Limit Sw.2 Setpt. 0 - 100 % DLSWSP2 50
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