13
Connect the 24-36 VDC OUT terminal on the enthalpy switch/
receiver to the 24-36 VDC IN terminal on the return air enthalpy
sensor. (See Fig. 30.)
There are two jumpers. One jumper determines the mode of the
enthalpy sensor. The other jumper is not used. To access the
jumpers, remove the 4 screws holding the cover on the enthalpy
sensor and then remove the cover. The factory settings for the
jumpers are M3 and OFF.
The mode jumper should be set to M3 for 4 to 20 mA output. The
factory test jumper should remain OFF or the enthalpy sensor will
not calculate enthalpy.
Power Exhaust
Refer to the accessory power exhaust installation instructions for
information on installing the power exhaust accessory.
Demand Controlled Ventilation
When using the EconoMi$er
®
2 system for demand controlled
ventilation, there are some equipment selection criteria which
should be considered. When selecting the heat capacity and cool
capacity of the equipment, the maximum ventilation rate must be
evaluated for design conditions. The maximum damper position
must be calculated to provide the desired fresh air.
Typically the maximum ventilation rate will be used about 5 to
10% more than the typical cfm required per person, using normal
outside air design criteria. The ventilator software (demand
control ventilation software) may be used to determine the CO
2
recovery rate at maximum ventilation.
A proportional anticipatory strategy should be taken with the
following condition: a zone with a large area, varied occupancy,
and equipment that cannot exceed the required ventilation rate at
design conditions. Exceeding the required ventilation rate means
the equipment can condition air at a maximum ventilation rate that
is greater than the required ventilation rate for maximum
occupancy. A proportional anticipatory strategy will cause the
fresh air supplied to increase as the room CO
2
level increases even
though the CO
2
set point has not been reached. By the time the
CO
2
level reaches the set point, the damper will be at maximum
ventilation and should maintain the set point.
In order to have the CO
2
sensor control the economizer damper in
this manner, first determine the damper voltage output for
minimum or base ventilation. Base ventilation is the ventilation
required to remove contaminants during unoccupied periods. The
following equation may be used to determine the percent of out
-
side air entering the building for a given damper position. For best
results there should be at least a 10-degree difference in outside
and return air temperatures. (TO x OA) + (TR x RA) = TM
• TO = Outdoor-Air Temperature
• OA = Percent of Outdoor-Air
• TR = Return-Air Temperature
• RA = Percent of Return-Air
• TM = Mixed-Air Temperature
Fire and Smoke Control
The PremierLink
™
or third party control can be wired to a smoke
detector or alarm system to provide fire and smoke control
functions. (See Fig. 29.)
Fig. 29 — PremierLink™ Controller Wiring — Enthalpy Control (33CSENTHSW)
33CSENTHSW
®
mA in VDC out
4-20
24-36
Model #: HH57ZC003
Power: 24 VAC
Output: 10 A Form 1C Relay w/
24 VAC Sourced Power
RETURN AIR
ENTH. SENSOR
HI
LOW
24
VAC
ENTHALPY
1234
1234
1
1
RED
WHT
BLK
BRN
GND
VIO
+4-20
Fan
CMP1
CMP2
HS1
HS2
HS3/
EXH/RVS
PWR
GRN
YEL
BLU
WHT
PNK
ORN
RED
RED
RED
GND
7
4
1
10
13
RELAYS
16
BLU
BRN
BLK
BRN
ORN
BRN
VIO
BRN
RED
BRN
BLU
GRN
RED
YEL
RED
BLU
RED
WHT
RED
PNK
RED
ORN
RED
ENTH
NOT USED
SFS
FSD
CMPSAFE
RMTOCC
DDC Control
OAQ
COM
COM
IAQI
COM
OAT
COM
SAT
STO
COM
SPT
J6
ANALOG
J5
0-20mA IN
J4
DISCRETE
7
31
ANALOG
0-20mA IN
1
-
+
-
+
11
9
DISCRETE
5
7
3
1
J4
PWR
COMMS
1
1
J1
J2
0
1
RA-14
J3
BRN
J3
Service/
Navigation port
0
1
J1
J2
0-20mA
PP/MP
J9
J7
J8
Cut for Dual
Transformer
Equipment
RED
RELAYS
Cut to isolate power supply to controller
RED
CCN/LEN
PWR
Econo
Not
Used
Switch
Position 0
Position 1
1
LEN
CCN
4
No Action
Load Factory Defaults on Powerup
BUS #
Element #
Unit Designation:
J4
DISCRETE
G
Y1
Y2
W1
W2
ENTH
YEL
RED
BLU
RED
WHT
RED
PNK
RED
ORN
RED
GRN
RED
TSTAT CONTROL
J9
J7
J8
Part Number: 33CSPREMLK
UNIT GROUND, BRN WIRE
FROM 12-PIN HARNESS.
GRY
GRY
ORN
RED
