background image

22

AIRFLOW

AIRFLOW

RETURN

BAROMETRIC 

BYPASS

HORIZONTAL APPLICATION

SHEET MET

A

L

PIPE

SUPP

L

Y

PLENUM

A/C UNIT

OR

FURNACE

A/C UNIT

OR

FURNACE

RETURN

AIR 

PL

A

TFORM

BAROMETRIC

BYPASS

 

RETURN AIR GRILLE

AIRFLOW

SUPP

L

Y

PLENUM

VERTICAL APPLICATION

ROOFTOP INSTALLATION

  

Down Discharge Application

A/C UNIT

OR

FURNACE

BAROMETRIC 

BYPASS

AIRFLOW

SHEET MET

A

L

PIPE

RETURN

PLENUM

SUPP

L

Y

PLENUM

ROOF LINE

OPEN RETURN PLENUM BYPASS APPLICATION

RETURN AIR 

GRILLE

AIR CONDITIONING

UNIT 

SUPP

L

DUCT

BYPASS DAMPER

T

o

 p

r

event bypass air f

rom

flowing out the 

r

etu

r

n grill,

use a short open ended

r

etu

r

n air plenum to

connect the bypass

damper to the unit.

BYPASS DAMPERS- BAROMETRIC

INSTALLATION

The  round  barometric  bypass  damper  can  be  installed  in  any 

position.  This  damper  is  factory  set  for  horizontal  installation 

and  can  be  field modified for vertical installation.  Do not run 

speed screws into damper housing.  Screws  may  interfere  with 

damper travel. Make sure counterweight is not obstructed in any 

way.

     a) Install the bypass damper between the supply and return

            plenums of the unit. It must be the first tap off the supply plenum.

     b) Be sure the air flows through the damper in the proper

           direction as indicated by the arrow on the damper. Airflow

           is always from supply to return plenum. Be certain the

          damper shaft is horizontal.

     c)  Loosen counter weight with allen wrench.

     d) Loosen lever arm from damper shaft and allow to hang

           straight down.

     e) Fully close damper by grabbing damper shaft on side

           attached to lever arm and turning clockwise until it stops.

      f) While holding the damper fully closed, rotate the lever

           arm a little to the right (facing the damper) and then

           screw into tighten to the damper shaft.  Then tighten lock

            nut.

     g) Be sure the damper is being held closed by the counter

           weight. Proceed to setup.

BAROMETRIC BYPASS SETUP

    a) Turn off all thermostats.

    b) Turn on Controller and set fan switch to “ON” position.

           Allow fan to run for 5 minutes to equalize pressure.

            Then make sure all dampers are open by checking

            for air flow out of each damper.

    c) By moving counter weight up or down the lever arm,

           adjust it so the damper just wants to start opening.

 

    d) If the damper cannot be held closed with the counter

           weight all the way to the bottom of the lever arm, then

           hold the damper shaft, loosen the lever arm from the

           damper shaft, and rotate the lever arm farther to the

           right and retighten.  Repeat Step C.
    e) The barometric bypass damper is now calibrated.

BAROMETRIC BYPASS STARTUP TEST

   a) Have at least half of the zones call for either heating or

          cooling.

   b) Check to be sure the calling zone dampers are open,

         (air is flowing).
   c) Verify the bypass damper is open.  Note, the damper

         may not fully open.
   d) If the open zones are not noisy, the bypass damper is

          set.

Summary of Contents for GEN II-R

Page 1: ...R Installation and Applications Manual Control 2 10 Zones with 2 or 3 Wire Dampers using Standard Thermostats with only 1 Gen II R per System Residential Light Commercial Zoning utilizing 2 postion zo...

Page 2: ...ntrol board R C Y W OB and E if using emergancy heat in Heat Pump operation 10 Address the the first damper control board jumper as 1 see pages 10 and 11 for thermostat installation and addressing Not...

Page 3: ...the factory on one pin for normal gas heat operation where the fan is controlled by the HVAC system fan control When a fan output is required from the GEN II R controller on a call for heat place the...

Page 4: ...g Schematic 4 DAMPER CONTROL BOARD THERMOSTAT SELECTION Round and Rectangular Damper Selection Sizing Sizing Transformer Based on Damper Count Slaving Zone Dampers 10 ZONE DAMPERS 2 OR 3 WIRE SELECTIO...

Page 5: ...lay fully adjustable capacity control with on board limit settings and optional staging strategies The system provides the installing contractor with a simple startup diagnostic to minimize wiring err...

Page 6: ...SFORMER 5 TONS AND UNDER OVER 5 TONS BAROMETRIC BYPASS Round 101ABBD diam Rectangular RBB W x H BYPASS DAMPER ELECTRONIC MODULATING BYPASS DAMPER Includes Integrated Static Pressure Control Round STBP...

Page 7: ...y selected When the GEN II R controller changes modes a 5 minute purge cycle is initiated before the changeover is completed On active heat or cool calls the non calling zones will close When the last...

Page 8: ...er out to Dampers R C 18 ga thermostat wire TR1 TR2 Damper Power Daisy Chain Damper to Damper 18GA Thermostat wire GAS ELECTRIC OPERATION GEN II R 7 2 SET DN UP S S GND B ON AUTO TIME TMP TIME EH O B...

Page 9: ...han 40 F 4 C 3 RAISE Press the DN button after C is displayed immediately release the DN button and press the UP button Hold until the desired temperature reading is displayed and release 4 Press the...

Page 10: ...SET and DN buttons H simultaneously When delay time appears in the display release the buttons and immediately press the DN button and hold until the desired delay time is displayed and release To ve...

Page 11: ...alibrated to the controller at the factory However the calibration should be checked as part of the system setup procedures If adjustments are required use the Blue potentiometer labeled R44 located i...

Page 12: ...a 5 minute purge cycle with all supply dampers closing then all dampers modulate open for ventilation GENERAL INSTALLATION INSTRUCTIONS for 5 minutes Heat Pump operation B reversing valve By placing t...

Page 13: ...oller is configured for Heat Pump HP jumper F on both pins the Cool Heat cut out temperatures are 45 126 F 7 52 C The cut out temperatures can be changed with the following procedure Heat cut out temp...

Page 14: ...control board must have a unique address from 1 10 To set the damper control board address there is a jumper on the board Find the first damper in the daisy chain and place the jumper on ZN1 for addr...

Page 15: ...at Cool 7 day programable thermostat Note For heat pump operation with emergency heat install one heat pump thermostat with emergency heat operation on any zone WIRING TO A GAS ELECTRIC THERMOSTAT A A...

Page 16: ...MPER ZONE DAMPER DM 2 A A B B RC MC RO E Y W OB C R C R ZN1 ZN2 ZN3 ZN4 ZN5 ZN6 ZN7 ZN8 ZN9 ZN10 RUN OPEN RUN CLOSED ZONE DAMPER DM 3 A A B B RC MC RO E Y W OB C R C R ZN1 ZN2 ZN3 ZN4 ZN5 ZN6 ZN7 ZN8...

Page 17: ...W2 G R HP GE O B R Y1 Y2 G W2 A HP HP HP S S TR1 TR2 TR1 TR2 A A B B RC MC RO E Y W OB C R C R ZN1 ZN2 ZN3 ZN4 ZN5 ZN6 ZN7 ZN8 ZN9 ZN10 RUN OPEN RUN CLOSED HP 24V POWER IN 24V POWER OUT FIELD SUPPLIED...

Page 18: ...st be connected to the GEN II R TR2 terminal Confirm the daisy chain wiring is correct at this time 3 Check A B wires for proper color code and connections polarity is imperative All A connec tions mu...

Page 19: ...ycle times out the opposing thermostat call is initiated and the appropriate HVAC outputs are energized and the supply damper opens The thermostat with the opposing call must now satisfy before the GE...

Page 20: ...r is fully closed and cycle off when the damper is opening or in the full opened position Since this is a spring open damper in the event of power failure the damper fails to the full open position RE...

Page 21: ...s to the maximum static pressure drop in inches of water column between the input upstream of the zone damper and the output downstream when the damper is closed DUCT DIAMETER NOMINAL CFM DUCT VELOCIT...

Page 22: ...0 7000 7800 8400 9150 10000 10700 11900 13000 13800 14900 15200 16500 17500 30 1500 2100 2700 3425 4200 4950 5700 6350 7150 8400 9150 10000 11000 11800 12400 13800 14200 15000 16000 17400 18500 32 160...

Page 23: ...ansformer must be sufficient to power the number of dampers used Also a properly rated in line fuse must be used on the secondary of the transformer To determine the power rating of the transformer an...

Page 24: ...or STCD damper ZONE DAMPER 2 MC RO RC ZONE DAMPER 3 MC RO RC 24 VOLT TRANSFORMER CONTROL RELAY SPST CONTROL RELAY SPST ZONE DAMPER 1 MC RO RC STMPD or STCD damper STMPD or STCD damper STMPD or STCD d...

Page 25: ...installed in any position The RBB rectangular damper must be installed with horizontal air flow only SIZING When only the smallest zone is calling the maximum amount of excess supply air flow through...

Page 26: ...Be certain the damper shaft is horizontal c Loosen counter weight with allen wrench d Loosen lever arm from damper shaft and allow to hang straight down e Fully close damper by grabbing damper shaft...

Page 27: ...r ROUND BYPASS DAMPER SELECTION The Zonex Systems STBP damper is used for round bypass applications When you know the bypass CFM requirements use the ROUND BYPASS SELECTION TABLE to confirm the round...

Page 28: ...4000 4500 5000 5500 6000 14 1167 1458 1750 2042 2333 2625 2917 3208 3500 4083 4667 5250 5833 6417 7000 16 1333 1667 2000 2333 2667 3000 3333 3667 4000 4667 5333 6000 6667 7333 8000 18 1500 1875 2250...

Page 29: ...a dedicated 24vac 40VA transformer 3 Do not install the bypass damper outside 4 Locate the Integrated Pressure Control IPC and air tube on the bypass damper 5 Drill hole into the side of the supply du...

Page 30: ...1 To open all dampers it may be necessary to remove Y outputs to unit on the zone control board and to make full cool calls on all thermostats This will modulate dampers fully open and lock out compr...

Page 31: ...ite http www zonexproducts com Part GENII RMAN PATENTED PRODUCT Zonex Systems reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obl...

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