Honeywell Taz3 Manual
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TZ-3 TOTALZONE® ZONE CONTROL PANEL 11 68-0223-2 . Stages Based On Number of Zones Calling The thermostat controls the first stage of heat or cool. The second stage of heat and cool and the third stage of heat are ener gized by the percentage of zones calling. See Table 4. Set the DIP switches as follows: See Table 4 to determine the number of zones re quired to activate stages of equipment based on the number of zones in the system. Staging is based on the zones available in the s ystem, not the number of zones used for the particular application. As zones satisfy, stages 2 and 3 drop out. Thermostat Operation Conventional Thermostats Conventional (R,W,Y,G) heat/cool thermostats can be used with the TZ-3 to control single or multi-stage gas, electric or oil s ystems and heat pumps with auxiliary heat. The panel can be configured to control second stage heat and cool and third sta ge heat using a 5-30 minute panel, or staging can be controlled by the percentage of zones calling. The O and B e quipment terminals are energized for changeover use with heat pumps. Heat Pump Thermostats HEAT PUMP THERMOSTATS WITH SINGLE Y OUTPUT Heat pump thermostats can be used if thermostat control of 2nd stage is desired. Thermostats that have a single Y terminal for first stage heat and cool can be used. When selected, all thermostats must be similar. If the thermostat ener gizes O on a call for cool, DIP switch 7 must be set to On and the O thermostat wire connected to W on the thermostat connections for that zone. If the thermostat ener gizes B on a call for heat, DIP switch 6 must be set to On and the B wire connected to W on the panel. In either case, the O is always energized to the equipment in cooling, and the B is always energized to the equipment in heating. IMPORTANT Be sure DIP switches 6 and 7 are never both in the On position. HEAT PUMP THERMOSTATS WITH SEPARATE Y1 AND W1 TERMINALS Use heat pump thermostats with separate Y1 and W1 terminals for first stage heat and cool. Keep DIP switches 6 and 7 in the Off position when thermostat O or B wire is not used. Emergency Heat Control Emergency heat is defined as using an auxiliary heat source without using the heat pump. When the Em Heat switch or a thermostat puts the panel in the emergency heat mode, the heat pump is locked out and calls for heat are sent to the E terminal. A heat pump thermostat can also control emergency heat from the thermostat system switch. An L terminal energized during the emergency heat mode is required. The recommended heat pump thermostats all have hot L terminals. See Table 1. The two sta ge Em heat jumper connects W2 and E. Jumper both pins to energize the W2 equipment on a call for emergency heat. When E is a different source of heat than W2, remove the jumper (for example, two-stage heat pump with electric heat strip auxiliary heat ). The jumper is located below the equipment terminals on the lower-left corner of the panel. Multi-Stage Thermostats Use multi-stage thermostats to control two stages of heat via W1 and W2 thermostat terminals. Control the third stage of heat through the stage timer built into the panel. Control the second sta ge of cooling with the timer. Manual and Automatic Changeover Thermostats Automatic changeover thermostats provide automatic changeover by zone. Manual changeover thermostats heat or cool based on the mode of each zone thermostat. DIP Switch NumberStatus 1Off 5On DIP Switch NumberStatus 1On 5Off Table 4. Staging by Percentage of Zones Calling. Number of Zones in SystemNumber of Zones Required 2nd Stage Heat3rd Stage Heat2nd Stage Cool 32 32 42 33 52 43 63 54 73 54 83 65 94 75 10 4 7 6 11 4 8 6 12 5 9 7
TZ-3 TOTALZONE® ZONE CONTROL PANEL 68-0223-2 12 Rebooting Microprocessor Certain conditions can hang up the microprocessor. To reset it, press and release the Boot button. The system reboots and enters the Purge mode. Discharge Air Temperature Sensor The Discharge Air Temperature Sensor (not included) is a su pply-duct-mounted temperature probe used to control capacity and prevent over-heating or coil-icing. The sensor attaches to the TL terminals on the panel. Set the hi gh limit temperature on the maximum temperature dial on the panel, located left of the stage timer. See. Fig. 19. Set the tem perature from 110 °F to 160°F in ten-degree increments. The recommended setting for fossil fuel/ electric systems is 160°F (default factory setting). For heat pump s ystems, the recommended setting is 120F. The coolin g temperature limit can be set at 40°F or 48°F. Fig. 19. Maximum temperature dial. IMPORTANT Be sure the Discharge Air Temperature Sensor wir- ing does not run parallel with line voltage wiring unless more than 12 in. of separation exists or shielded cable is used. Use DIP switch 2 to change cooling limit settings. If the s ystem trips due to exceeding a high or low temperature limit, the heating or cooling system shuts down and the fan continues runnin g to purge the conditioned air from the plenum. When the low limit is tri pped, the Cool LED flashes until it resets. When the high limit is tripped, the Heat LED flashes until it resets. Once the tem perature recovers by ten degrees, the equipment run resumes. Zone-A-Lone Switch When the Zone-A-Lone switch is in the occupied position and the OC/OC terminals are not used, the s ystem functions as a normal zone control system. When switched to the unoccupied position, all dampers are opened and all requests for heat, cool, or fan, exce pt from zone one, are not honored. The zone one thermostat becomes the controlling thermostat for the entire system. During long unoccupied periods, one thermostat can be set back instead of ad justing each zone thermostat in the building. The T8601D2027 and T8611G2051 include two OC terminals. When wired to the TZ-3 OC terminals, and with the Zone-A- Lone switch in the occu pied position, the board enters the unoccu pied mode during the Leave and Sleep programs. This feature requires two extra wires to the Zone 1 thermostat. Circuit Breaker Protection A built-in thermal circuit breaker protects the TotalZone panel. This circuit breaker protects the panel against shorts in the thermostat and damper wiring and the remote occupied/ unoccupied switch. It does not protect against shorts in the wirin g of the HVAC equipment into the panel. When the circuit breaker is tri pped, none of the LEDs illuminate and the yellow rectangular component located to the left of the TR1 and TR2 terminals is hot to the touch. Remove power to the panel for at least ten seconds to allow the circuit breaker to cool off and reset. To eliminate the short, verif y the dampers and thermostat wiring. Fan On In Heat The system blower can be set to come on with a call for heat as re quired for hydro-air, heat pump, or electric heat systems. Set the blower using DIP switch 8. TotalZone Add-A-Zone Panels Using TotalZone Add-A-Zone Panels, the system can be ex panded to up to 30 zones. There are three models: TAZ-1, one zone; TAZ-2, two zone; and TAZ-3, three zone. Two wires are re quired to connect the TAZ to the TZ-3. IMPORTANT: When multiple panels are used, it is important that the transformers be in-phase. Check the phasing by measuring for 24V across the TR2 transformer termi- nals on each panel. There should be 0 Vac. If not, reverse the TR1and TR2 transformer wires on one of the panels and recheck. See Fig. 13 and the TAZ installation instructions for more information. Dip SwitchStatus Cooling Temperature Limit 2Off40°F 2On48°F 130 F MAXIMUM TEMPERATURE M19079 120 F 110 F 140 F 150 F 160 F DIP Switch 8Fan Control OffHVAC system OnFan on in heat
TZ-3 TOTALZONE® ZONE CONTROL PANEL 13 68-0223-2 TROUBLESHOOTING Table 5. Troubleshooting. Symptom Possible Cause Action No LEDs are IlluminatedNo power to the board.Check for 24 Vac (±10%) across TR1 and TR2 Shorted wire.Check fuse. If hot, a short exists in thermostat, damper, or Zone-A-Lone wiring. Damper LEDs on, but no other LEDs illuminated.Insufficient voltage.Check for 24 Vac (±10%) across TR1 and TR2. Incorrect configuration.Check jumpers and DIP switches for correct configuration. Erratic OperationEmergency Heat switch on.Turn off (down) Emergency Heat switch. Zone-A-Lone Feature on.Turn off (up) Zone-A-Lone. Heat pump operates incorrectly or not at all.Incorrectly wired.Ver i fy that W1 and Y1 equipment terminals are jumped. Incorrectly configured.Ver i fy DIP switches 6 and 7 are correctly set for the type of thermostat used. Heat LED flashing.High limit reached.LED stops flashing with ten-degree fall. Cool LED flashing.Low limit reached.LED stops flashing with ten-degree rise. Idle LED flashes five times on bootup.ZMS problem or not connected.Ver i fy that ZMS (if any) is connected, and wired correctly. Idle LED flashes continuousl y ZMS failure.Check for dc voltage across TL terminals: If 0 volt = short. If 1 volt = o pen. If .2 to .8 volt = normal. Add-A-Zone not operating.Incorrectly configured.Ver i fy DIP switch settings on the TAZ panels. Incorrectly wired.Check AZ1and AZ2 for correct wiring. Be sure that AZ1 and AZ2 are at least 12 in. from line volta ge wiring. Be sure the transformers are in-phase.
TZ-3 TOTALZONE® ZONE CONTROL PANEL 68-0223-2 14 Table 6. DIP Switch Settings and Functions. Table 7. LED Indicators. DIP Switch Function Off (default) On 1Staging by number of zones calling.Stages timer or thermostat controlled.Stages controlled by number of zones calling. 2ZMS low limit.40°F48°F 3Purge mode timing.Three and one-half minutes.Two mi nu t es . 4Fan control during purge.Controlled by panel.HVAC equipment controlled 5Control of W2 outpu.tTimer controlled.Controlled by W2 from thermostat, 6Cool changeover from thermostat.Not using B on single Y thermostats; or using conventional thermostats.Using B on single Y thermostat. 7Heat changeover from thermostat.Not using O on single Y thermostats; or using conventional thermostats.Using O on single Y thermostat. 8Fan control in heat.Fan controlled by panel in cool and HVAC equipment in heat.Panel in heat and cool controlling fan. LED Color Illuminated Not Illuminated Flashing HeatRedHeat callNo heat calls.High limit reached CoolGreenCool callNo cool calls.Low limit reached PurgeAmberPurge modeNot in Purge mode.ZMS failure IdleRedNo callsCall for heat, cool, or fan.Initial powerup without ZMS wired FanGreenFan only callNo fan only call.— EM HeatRedEmergency Heat modeNot in emergency Heat mode.— Zone 1,2,3Zone 1,2,3Green—open Red—closed Amber—movin g (some dampers) ——
TZ-3 TOTALZONE® ZONE CONTROL PANEL 15 68-0223-2 See Fig. 20 for TZ-TotalZone Zone Control Panel. Fig. 20. TZ-3 TotalZone Zone Control Panel. ZoneMAX™ TERMINALSSYSTEM STATUS LED INDICATIORS TEST JUMPERS (NOT USED)ZONE DAMPER LED INDICATORS ZONE-A-LONE™ SWITCH BOOT BUTTON EMERGENCY HEAT SWITCH RESETTABLE FUSETRANSFORMER TERMINALS ZoneMAX™ TEMP SETTING ZONE, THERMOSTAT & DAMPER MOTOR TERMINALSREMOTE ZONE-A-LONE™ CONTROL TERMINALS STAGE TIMER DIP SWITCHES FOR SYSTEM CONFIGURATION 2 STAGE EM HEAT JUMPERHVAC EQUIPMENT TERMINALS ADD-A-ZONE™ TERMINALS M13421
68-0223-2 G.H. Rev. 9-01 www.honeywell.com/yourhome Home and Building Control Home and Building Control Honeywell Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9 Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers. TZ-3 TOTALZONE® ZONE CONTROL PANEL