background image

10

c.

Adjust the

minimum

volume

control knob

(marked “LO” and located at the side of the con-
troller) until the desired pressure differential is
registered on the manometer. To determine the
required pressure differential, refer to Table 5 and
the Linear Averaging Probe Chart provided on the
side of the VAV unit and in Fig. 6.

d.

Reconnect the thermostat line.

Balancing

Procedure

(Control

Sequences

1104-1110)

1. Damper action is factory set at N.O. (normally open) or

N.C. (normally closed). To reselect, loosen damper selec-
tion switch screw, align pointer with damper pointer and
tighten screw. The spring range of the actuator is not criti-
cal since the controller will output the necessary pressure
to the actuator to position the damper according to set
point. (See Fig. 11.)

2. Pipe the controller: Connect port “B” to the damper actu-

ator. Connect port “M” to the clean, dry main air. Connect
port “T” to the thermostat output. Connect port “H” to the
total pressure tap on the airflow sensor. Connect port “L”
to the static pressure tap on the airflow sensor.

The controller can be set up for cooling or heating applications
using either a Direct Acting (DA) or Reverse Acting (RA)
thermostat signal. The two flow adjustments are labeled “LO
STAT

P” and “HI STAT

P.”

LO STAT

P

setting is the desired airflow limit when the

thermostat pressure is less than, or equal to, the reset start
point.

For DA Cooling or RA Heating:
Adjust LO STAT

P to the desired minimum airflow

with 0 psig (or a pressure less than the reset start point)
at port “T.” The LO STAT

P must be set first. The LO

STAT

P will affect the HI STAT

P setting.

For RA Cooling or DA Heating:
Adjust LO STAT

P to the desired maximum airflow

with 0 psig (or a pressure less than the reset start point)
at port “T.” The LO STAT

P must be set first. The LO

STAT

P will affect the HI STAT

P setting.

HI STAT

P

setting is the desired airflow limit when the ther-

mostat pressure is greater than, or equal to, the reset stop-point.
The reset stop-point is the reset span pressure added to the
reset start-point pressure.

For DA Cooling or RA Heating (see Fig. 12):
Adjust HI STAT

P to the desired maximum airflow with

20 psig (or a pressure greater than the reset stop point) at
port “T.” The HI STAT

P must be set last. The HI STAT

P setting will be affected by the LO STAT

P setting.

For RA Cooling or DA Heating (see Fig. 12):
Adjust HI STAT

P to the desired minimum airflow

with 20 psig (or a pressure greater than the reset stop
point) at port “T.” The HI STAT

P must be set last. The

HI STAT

P setting will be affected by the LO STAT

P

setting.

NOTE: After the “LO STAT

P” and “HI STAT

P” initial

adjustments are made, cycle the thermostat pressure a few
times to settle the internal reset mechanisms and verify set-
tings. Fine tune the settings if necessary. The thermostat pres-
sure may be left at a high pressure and the “G” port cap may be
removed and replaced to cycle the reset mechanism.

RESET START

setting is factory set at 8.0 psig. This is the

lowest thermostat pressure that the LO STAT

P airflow will

begin to reset towards the HI STAT

P airflow. To change the

RESET START setting: regulate thermostat pressure to the “T”
port to the desired reset start point pressure, adjust RESET
START adjustment until pressure at the “G” port is slightly
higher than 0 psig, i.e., 0.1 psig.
NOTE: The “G” port taps into the controller’s internal reset
chamber, which always starts at 0 psig. The RESET START
adjustment is a positive bias adjustment that sets the desired
thermostat start point to the controller’s internal reset start
point of 0 psig.

RESET SPAN

setting is factory set at 5.0 psig. This is the

required change in thermostat pressure that the controller will
reset between the LO STAT

P setting and the HI STAT

P

setting. To change the RESET SPAN setting: adjust RESET
SPAN adjustment until pressure at the “G” port equals the
desired reset span pressure.
NOTE: The “G” port taps into the controller’s internal reset
chamber, which will always be at a pressure between 0 psig
and the RESET SPAN pressure.

Preventative Maintenance

1. Inspect pneumatic tubing for loose connections or leaks.
2. Clean out pneumatic line filters regularly according to

manufacturers recommendations.

Pneumatic Control Troubleshooting —

See Table 5.

Table 5 — Troubleshooting

NOTE: Always Check:

1. Main air pressure (15 psi to 25 psi) at the controller.
2. Disconnected or kinked pneumatic lines to the controller.
3. Quality of compressed air (oil or water in lines).

4. Proper thermostat signal and logic (Direct/Reverse Acting).
5. Blocked velocity probe or insufficient primary supply air.
6. Leaks in the actuator diaphragm.
7. Mechanical linkage of the actuator/air valve.

PROBLEM

PROBABLE CAUSE

Controller does not reset to maximum or minimum set point during
balance procedure.

Balancer is using the thermostat for control signal. An artificial signal
must be provided in place of the thermostat.

Controller does not reset to maximum or minimum set point during
operation.

Thermostat is not demanding maximum or minimum air volume. Main
air pressure at the controller is less than 15 psi.

Pneumatic actuator does not stroke fully.

Leak in pneumatic line between the controller and the actuator. Main
air pressure at the controller is less than 15 psi. Leak in the diaphragm.

Air valve stays in wide open position.

Velocity probe is blocked by an obstruction (sandwich bag, etc.).
Insufficient supply air in the inlet duct.

Содержание 35E

Страница 1: ... ADJUSTMENT SLIDEBAR WIRING THE CCN NETWORK COMMUNICATION SERVICE JACK PRIMARY AIR TEMPERATURE SENSOR INSTALLATION INDOOR AIR QUALITY SENSOR INSTALLATION INDOOR AIR QUALITY SENSOR WIRING HUMIDITY SENSOR Wall Mounted INSTALLATION Connect the CCN Communication Bus 19 COMMUNICATION BUS WIRE SPECIFICATIONS CONNECTION TO THE COMMUNICATION BUS Water Valve Installation 19 ComfortID Start Up 19 GENERAL PR...

Страница 2: ...ls or controls File damage claim immediately with transportation agency and notify Carrier UNIT IDENTIFICATION Each unit is supplied with a shipping label and an identification label Fig 2 INSTALLATION PRECAUTION Check that construction debris does not enter unit or ductwork Do not operate the central station air handling fan without final or construction filters in place Accumulated dust and cons...

Страница 3: ...urn tracking 4149 Proportional floating hot water with supply return tracking 4150 Return air damper CCN Thermostats Ordered Separately Thermostat 33ZCT56SPT RT room temperature sensor with set point adjust and override Thermostat 33ZCT55SPT RT room temperature sensor with override only Thermostat 33ZCT58SPT Communicating room tempera ture sensor with LCD liquid crystal diode set point adjust fan ...

Страница 4: ...ion area Remove unit from ship ping package Do not handle by controls or damper extension rod 2 The unit has factory installed brackets on unit as shown in Fig 3 3 Suspend units from building structure with straps rods or hanger wires Secure the unit and level it in each direc tion Note that reheat coil is in heavy end of unit Step 2 Make Duct Connections 1 Install supply ductwork on unit inlet co...

Страница 5: ...04 0 35 675 13 0 21 0 09 0 27 0 44 0 60 0 76 0 09 925 13 0 39 0 17 0 51 0 82 1 13 1 43 0 17 240 240 or 0 240 4 9 0 02 0 01 0 02 0 03 0 04 0 05 0 01 9 550 11 3 0 08 0 07 0 12 0 17 0 22 0 27 0 07 0 44 875 16 0 21 0 17 0 31 0 44 0 57 0 69 0 17 1200 16 0 40 0 32 0 59 0 83 1 07 1 31 0 32 300 290 or 0 300 6 2 0 02 0 01 0 02 0 04 0 05 0 07 0 01 10 675 13 9 0 08 0 04 0 12 0 20 0 27 0 35 0 04 0 55 1075 21 ...

Страница 6: ...is typical of 480V 3 phase 4 wire heater and control Refer to actual unit wiring diagram AFS Airflow Switch DDC Direct Digital Controls Fig 5 Typical Power Connections for 35E Units with 3 Stage Electric Heat ANALOG OR DDC CONTROLLER 24VAC BLU YEL CLASS II TRANSFORMER OPTIONAL 120VAC 208VAC 240VAC 277VAC L1 GROUND 24 VAC POWER LEGEND NOTE Drawing is typical refer to actual unit wiring diagram for ...

Страница 7: ...s will provide a permanent record of the balanc ing information installation location information box size cooling minimum airflow cfm limit cooling maximum airflow cfm limit reheat cfm limit if applicable heating minimum airflow cfm limit if applicable heating maximum airflow cfm limit if applicable calibration gain after balancing set points PNEUMATIC CONTROLS Preparation for Balancing Control S...

Страница 8: ...______ ENGINEER ______________________________________________ BUILDING LOCATION FLOOR ______________________________ BUS NUMBER ___________________________________________ Fig 7 Air Terminal Performance Sheet CONTROL SET POINTS Tag Number Zone Address Box Size in cfm Cooling cfm Reheat cfm Heating cfm Heat kW Occupied Unoccupied Calibration Gain min max min max Type Btu min max min max mult ...

Страница 9: ...DAMPER Control Sequence 1103 Refer to Fig 9 1 Maximum volume setting a Disconnect the thermostat line from the velocity controller b Adjust the maximum volume control knob marked HI and located in the center of the con troller to achieve the required minimum flow To determine the required pressure differential refer to Tables 2 and 5 and the Linear Averaging Probe Chart provided on the side of the...

Страница 10: ... initial adjustments are made cycle the thermostat pressure a few times to settle the internal reset mechanisms and verify set tings Fine tune the settings if necessary The thermostat pres sure may be left at a high pressure and the G port cap may be removed and replaced to cycle the reset mechanism RESET START setting is factory set at 8 0 psig This is the lowest thermostat pressure that the LO S...

Страница 11: ... heating set point slider all the way to the right for maximum heating 5 Read the DC voltage across the meter taps on the heating left side Adjust the maximum set point MAX INCR potentiometer clockwise to increase or counterclockwise to decrease to the DC voltage equal to the desired air flow cfm as shown on the calibration curve Fig 14 NOTE The maximum set point must be adjusted last Adjust ment ...

Страница 12: ...adjusted first Adjust ment of the MIN INCR potentiometer directly affects the max imum set point and auxiliary set point 2 Adjustment of auxiliary set point if required Read the DC voltage across the meter taps on the heating left side Adjust the MAX AUX INCR potentiometer clockwise to increase or counterclockwise to decrease to the DC voltage equal to the desired airflow cfm 3 Return the cooling ...

Страница 13: ... and 2 of connector J1 Refer to unit wire label diagram for minimum size VA and grounding requirements for each unit SUPPLY AIR TEMPERATURE SAT SENSOR INSTAL LATION On terminals with heat the SAT sensor is provid ed The sensor is factory wired to the controller and shipped in the control box The SAT must be field installed in the duct downstream from the air terminal The SAT sensor part num ber is...

Страница 14: ... connection will be made If connection is desired the CCN communication cable should be available at time of sensor installation for convenient wiring connections The cable selected must meet the requirements for the entire network See Connect the CCN Communication Bus section for CCN communication cable specifications RESISTANCE Ohms TEMP F RESISTANCE Ohms TEMP F RESISTANCE Ohms TEMP F RESISTANCE...

Страница 15: ...inches Fig 18 Space Temperature Sensor and Wall Mounted Humidity Sensor Mounting 2 3 4 5 6 1 SW1 SEN BLK GND RED SPT RED WHT GND BLK CCN COM SENSOR WIRING Fig 19 Space Temperature Sensor Wiring 33ZCT55SPT 2 3 4 5 6 1 SW1 SEN SET Cool Warm WHT T56 BLK GND RED SPT RED WHT GND BLK CCN COM SENSOR WIRING JUMPER TERMINALS AS SHOWN Fig 20 Space Temperature Sensor Wiring 33ZCT56SPT ...

Страница 16: ...he sensor end of the cable 3 Connect the sensor cable as follows a Connect one wire from the cable RED to the SPT terminal on the controller Connect the other end of the wire to the left terminal on the SEN ter minal block of the sensor b Connect another wire from the cable BLACK to the ground terminal on the controller Connect the other end of the wire to the remaining open termi nal on the SEN t...

Страница 17: ... the sensor where it is influenced by the supply air the sensor gives inaccurate readings if the supply air is blown directly onto the sensor To mount the sensor refer to the installation instructions shipped with the accessory kit INDOOR AIR QUALITY SENSOR WIRING To wire the sensor after it is mounted in the conditioned air space see Fig 23 25 and the instructions shipped with the sensor Use two ...

Страница 18: ...he center of the sensor 2 Connect the RED wire to the sensor screw terminal marked 3 Install one lead from the resistor supplied with the sen sor and the WHITE wire into the sensor screw terminal marked After tightening the screw terminal test the connection by pulling gently on the resistor lead 4 Connect the remaining lead from the resistor to the BLACK wire and secure using a field supplied clo...

Страница 19: ...nal zone controllers in a daisy chain fashion following the color coded wiring scheme in Table 9 NOTE The communication bus drain wires shield must be tied together at each zone controller If the communica tion bus is entirely within one building the resulting contin uous shield must be connected to ground at only one single point If the communication bus cable exits from one build ing and enters ...

Страница 20: ...s a portable device to change system set up and set points from a zone sensor or ter minal control module During start up the Building Supervisor or the Network Service Tool can also be used to verify commu nication with each controller For specific operating instructions refer to the appropriate user manual See Table 11 for troubleshooting information ComfortID TEST AND BALANCE TOOL SOFT WARE The...

Страница 21: ...n electric box mounted horizontally may be used instead of cutting the hole 2 Remove the cover from the thermostat controller Care fully remove the circuit board from the backplate of the thermostat controller Line up the backplate with the hole in the wall Push the protruding part of the backplate into the hole Pull the thermostat controller wires out through the backplate 3 Attach backplate to w...

Страница 22: ... board Slide the cir cuit board under the back plate securing bars DO NOT CREASE RIBBON CABLE 7 Align thermostat board with alignment pin Gently pull down on the thermostat latch and press firmly until the circuit board snaps into place 8 If optional locking thermostat cover is purchased insert locking clip on the inside of the thermostat cover Push firmly into place 9 Insert tabs on thermostat co...

Страница 23: ...k system Variable Volume and Temperature VVT Product Data literature and the configura tion instructions provided with the thermostat Refer to the specific control sequence 35E 82XX for de tailed operational information This information should be used to test and commission the control Control Start Up GENERAL Air volume delivery to the conditioned space is controlled by the modulating of the prim...

Страница 24: ... discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 533 530 Printed in U S A Form 35E 2SI Pg 24 3 06 Replaces 35E 1SI Copyright 2006 Carrier Corporation Book 3 Tab 6a ...

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