R8888A,B Hydronic Circulator Zone Panels with Priority Control

Transcription

1 A,B Hydronic Circulator Zone Panels with Priority Control EAURES PRODUC DAA APPLICAION he A,B Hydronic Circulator Zone Panels with Priority Control provide relay switching for multizone hot water control systems. Provide burner control and circulator pump motor control for up to three (A) or four (B) zones in hot water systems. Zone may be selected to give priority to the indirect hot water tank. Zone burner control can be disabled. he circulator can run without the burner to prevent short cycling of small capacity zones. Panels may be wired together for expansion while maintaining priority zoning. Up to four panels ( to 6 zones total) may be used in a system. he may be used in combination with the R8889 Hydronic Zone Valve Panels with Priority Control. or use in residential and light commercial applications. Operate 0V motors up to /6 hp. Include replaceable V NEMA rated transformer to provide power for low voltage control circuit. Include diagnostic light-emitting diodes (LEDs) for troubleshooting. Relays are socket-mounted and field-replaceable. Clearly marked terminal designations provide easy wiring. Compatible with electronic and electromechanical thermostats and Honeywell Aquastat Controls. Mount horizontally only. Contents Application... eatures... Specifications... Ordering Information... Installation... Operation... Service and Checkout... roubleshooting... U.S. Registered rademark Copyright 997 Honeywell Inc. All Rights Reserved X-XX UL

2 A,B HYDRONIC ZONE PANELS WIH PRIORIY CONROL SPECIICAIONS IMPORAN he specifications given in this publication do not include normal manufacturing tolerances. his unit may not exactly match the listed specifications. Also, this product is tested and calibrated under closely controlled conditions, and some minor differences in performance can be expected if those conditions are changed. RADELINE Models RADELINE models are selected and packaged to provide ease of stocking, ease of handling, and maximum replacement value. RADELINE Models Available: A Hydronic Circulator Zone Panel with Priority Control Provides switching for hot water control systems (up to three zones) with the ability to fieldconfigure Zone as priority over the others; includes separate V NEMA rated transformer that provides power to low voltage circuit. B Hydronic Circulator Zone Panel with Priority Control Provides switching for hot water control systems (up to four zones) with the ability to fieldconfigure Zone as priority over the others; includes separate V NEMA rated transformer that provides power to low voltage circuit. Electrical Ratings: Motor Load Ratings for Each Zone at 0 Vac: ull Load:.A. Locked Rotor : 6.A. Horsepower: /6 hp. Secondary Circuit: 0 VA max. hermostat Heat Anticipator Setting: 0.A. Maximum Ambient emperature Rating: 0 to 05 ( C to C). Humidity: 0 o 90% rh, non-condensing. erminals: Captivated wire-clamp screw terminals. inish: Painted gray enamel. Knockouts: Knockouts for / in. conduits in sides of case. Dimensions: See ig.. Replaces: Up to four R85 Relays. Approvals: Underwriters Laboratories Inc. listed: ile no. E6. Canadian Underwriters Laboratories. Replacement Parts: A0A ransformer Vac. 086 Replacement Relay. ORDERIN INORMAION or ordering information when purchasing replacement and modernization products from your RADELINE wholesaler or your distributor, refer to the RADELINE catalog or price sheets for complete ordering number or specify. Order number.. Number of zones. If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:. Your local Home and Building Control Sales Office (check white pages of your phone directory).. Home and Building Control Customer Relations Honeywell, 885 Douglas Drive North Minneapolis, Minnesota In Canada Honeywell Limited/Honeywell Limitée, 5 Dynamic Drive, Scarborough, Ontario MV Z9. International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, inland, rance, ermany, Japan, Mexico, Netherlands, Spain, aiwan, United Kingdom, U.S.A

3 A,B HYDRONIC ZONE PANELS WIH PRIORIY CONROL RON VIEW 0-/8 (57) SIDE VIEW -/8 (79) 7 (78) 6-/6 (57) 9-5/6 (7) ig.. mounting dimensions in in. (mm). M059A PRIMARY RANSORMER ERMINALS LINE VOLAE POWER ERMINALS LOW LIMI LED ERMINALS PUMP ERMINALS RELAY PUMP RELAYS ( OR, DEPENDIN ON MODEL) A0A RANSORMER SECONDARY RANSORMER ERMINALS LEDS ( OR, DEPENDIN ON MODEL) VAC POWER LED INSALLAION EXPANSION (A,B,C) ERMINALS PANEL YPE SWICH LED PRIORIY ENABLE SWICH CONROL SWICH ERMINALS ig.. Internal view of (B model shown). M9A When Installing this Product.... Read these instructions carefully. ailure to follow them could damage the product or cause a hazardous condition.. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.. Installer must be a trained, experienced service technician.. After installation is complete, check out product operation as provided in these instructions

4 A,B HYDRONIC ZONE PANELS WIH PRIORIY CONROL CAUION Disconnect power supply before beginning installation to prevent electrical shock or equipment damage. Choose Location If this is a replacement application, mount the in the same location as the old control or choose a suitable location as follows: Mount directly on a panel or wall near the equipment to be controlled. Make sure location is accessible for installation and service. Make sure operating ambient temperature at the selected location does not exceed 05 ( C). Mounting Mounting Remove the Cover by loosening and removing the screws. Carefully lift off the cover from the panel. Set aside the cover. IMPORAN he Relays can become loose during shipping. Make sure the relays are securely fastened in the sockets on the panel for proper operation. Position the panel on the wall at the selected location. Mount the horizontally only. Using the panel as a guide, mark the location of the mounting holes. Loosely fasten the panel to the wall or outlet box using four No. 8-/ in. screws (included) as shown in ig.. asten the screws securely. MOUNIN HOLES () WALL All wiring must comply with applicable electrical codes and ordinances. Run wiring from the system components to the location. Make wiring connections as shown in able and ig. 5 through. Make sure all line voltage connections are in the enclosure. Keep line voltage wires away from low voltage area as shown in ig.. Use the plastic bushing (included) in the knockout for the thermostat wiring to avoid damaging the thermostat wires. See ig.. IMPORAN he has knockouts on both sides of the case. Only specific wiring must be run through each knockout. See ig.. able. Wiring Connections. erminal Designation Connect to System Component H, H Burner control. C, C Circulator pump for each zone. L Line voltage (hot) power. L Line voltage (neutral) power. Zc Line voltage (hot) power input to all circulator relays. R, W Low voltage thermostat for each zone. C, R ( Vac) (XMR SEC.) A,B,C L, L (XMR PRI.) Low voltage power from transformer. Expansion to additional or R8889 Zone Panels. Line voltage power to transformer. LINE VOLAE WIRIN WIRIN LINE VOLAE AREA PUMP WIRIN PANEL MOUNIN SCREWS () M0 Wiring ig.. Mounting on the wall. CAUION. Disconnect power supply before beginning installation to prevent electrical shock or equipment damage.. Use copper conductors only.. Use only NEC Class wire for all line voltage wiring connections. Class wires must be rated for at least 67 (75 C). LOW VOLAE AREA LOW LIMI WIRIN EXPANSION WIRIN (LOW VOLAE) VOLAE BARRIER ZONE WIRIN (LOW VOLAE) ig.. knockout wiring designations. M

5 A,B HYDRONIC ZONE PANELS WIH PRIORIY CONROL L (HO) L 0 VA L L L L L ZC L8A,C ZC H H ZONE ZONE ZONE ZONE C C C C C C C C PUMP PUMP PUMP PUMP C C BLACK B WHIE B R88 MOOR C55 ORANE INIER ig. 5. ypical hookup for in oil-fired, tankless zoned systems with L8A,C Aquastat Controller. ZONE ZONE CONROL CASE MUS BE CONNECED O EARH ROUND. USE ROUNDIN SCREW PROVIDED. USE COPPER CONDUCORS ONLY. OR ALL CLASS CONNECIONS, USE WIRE RAED OR A LEAS 67 (75 C). 0 VA ZONE ZONE CONROL CASE MUS BE CONNECED O EARH ROUND. USE ROUNDIN SCREW PROVIDED. H H L L L L L ZC C C C C C C C C POWER SUPPLY. PROVIDE DISCONNEC MEANS AND OVERLOAD PROECION AS REQUIRED. I OAL CURREN EXCEEDS 7.A ULL LOAD, LIE O L8A,C MAY BE REDUCED. MA PUMP PUMP PUMP PUMP L (HO) L L8A,C ZC C C B B BLACK RAY WHIE R88P MOOR INIER ORANE VIOLE C55 USE COPPER CONDUCORS ONLY. OR ALL CLASS CONNECIONS, USE WIRE RAED OR A LEAS 67 (75 C). POWER SUPPLY. PROVIDE DISCONNEC MEANS AND OVERLOAD PROECION AS REQUIRED. OIL VALVE M077A I OAL CURREN EXCEEDS 7.A ULL LOAD, LIE O L8A,C MAY BE REDUCED. ig. 6. ypical hookup for in oil-fired, tankless zoned systems with L8A,C Aquastat Controller and R88P Oil Primary Control

6 A,B HYDRONIC ZONE PANELS WIH PRIORIY CONROL L (HO) L 0 VA L L L L L ZC L88A H H ZONE ZONE ZONE C C C C C C C C PUMP PUMP PUMP C C BLACK B WHIE B R88 MOOR C55 ORANE INIER L006 INDIREC WAER ANK PUMP CONROL CASE MUS BE CONNECED O EARH ROUND. USE ROUNDIN SCREW PROVIDED. ig. 7. ypical hookup for in oil-fired, zoned systems using L88A Aquastat Controller and priority zoned indirect water tank. USE COPPER CONDUCORS ONLY. OR ALL CLASS CONNECIONS, USE WIRE RAED OR A LEAS 67 (75 C). POWER SUPPLY. PROVIDE DISCONNEC MEANS AND OVERLOAD PROECION AS REQUIRED. MA

7 A,B HYDRONIC ZONE PANELS WIH PRIORIY CONROL 0 VA H H L L L L L ZC L L (HO) ZONE 5 L8A,C ZC ZR ZONE ZONE ZONE ZONE C C C C C C C C PUMP PUMP PUMP PUMP C C B B PUMP 5 BLACK WHIE 5 R88 MOOR C55 ORANE INIER CONROL CASE MUS BE CONNECED O EARH ROUND. USE ROUNDIN SCREW PROVIDED. USE COPPER CONDUCORS ONLY. OR ALL CLASS CONNECIONS, USE WIRE RAED OR A LEAS 67 (75 C). POWER SUPPLY. PROVIDE DISCONNEC MEANS AND OVERLOAD PROECION AS REQUIRED. ig. 8. ypical hookup for in oil-fired, zoned systems using L8A,C Aquastat Controller as a fifth zone. 5 I OAL CURREN EXCEEDS 7.A ULL LOAD, LIE O L8A,C MAY BE REDUCED. IH ZONE IS NO IN PRIORIY CIRCUI. MB 0 VA L L L L L ZC L (HO) L L88E H H ZONE ZONE ZONE ZONE C C C C C C C C PUMP PUMP PUMP PUMP V C C BLACK B WHIE B AS INIION SYSEM CONROL CASE MUS BE CONNECED O EARH ROUND. USE ROUNDIN SCREW PROVIDED. USE COPPER CONDUCORS ONLY. OR ALL CLASS CONNECIONS, USE WIRE RAED OR A LEAS 67 (75 C). POWER SUPPLY. PROVIDE DISCONNEC MEANS AND OVERLOAD PROECION AS REQUIRED. ig. 9. ypical hookup for in V, gas-fired, zoned systems using L88E Aquastat Controller. M

8 A,B HYDRONIC ZONE PANELS WIH PRIORIY CONROL 0 VA L L L L L ZC L (HO) L L88E H H V ZONE ZONE ZONE ZONE C C C C C C C C PUMP PUMP PUMP C C BLACK B WHIE B AS INIION SYSEM L006 INDIREC WAER ANK PUMP CONROL CASE MUS BE CONNECED O EARH ROUND. USE ROUNDIN SCREW PROVIDED. USE COPPER CONDUCORS ONLY. OR ALL CLASS CONNECIONS, USE WIRE RAED OR A LEAS 67 (75 C). POWER SUPPLY. PROVIDE DISCONNEC MEANS AND OVERLOAD PROECION AS REQUIRED. M5 ig. 0. ypical hookup for in V, gas-fired, zoned systems with L88E Aquastat Controller and priority zoned indirect water tank

9 A,B HYDRONIC ZONE PANELS WIH PRIORIY CONROL 0 VA L L L L L ZC L (HO) L L88B H H ZONE ZONE ZONE ZONE C C C C C C C C PUMP PUMP PUMP PUMP V C C B B MILLIVOL AS VALVE H H PP PP HERMOPILE CONROL CASE MUS BE CONNECED O EARH ROUND. USE ROUNDIN SCREW PROVIDED. USE COPPER CONDUCORS ONLY. OR ALL CLASS CONNECIONS, USE WIRE RAED OR A LEAS 67 (75 C). POWER SUPPLY. PROVIDE DISCONNEC MEANS AND OVERLOAD PROECION AS REQUIRED. ig.. ypical hookup for in millivolt, gas-fired, tankless zoned system. M

10 A,B HYDRONIC ZONE PANELS WIH PRIORIY CONROL L (HO) L 5 ZONE ZONE 0 VA H H ZONE ZONE L L L L L ZC C C C C C C C C PUMP PUMP PUMP PUMP L6006 LOW LIMI CONROLLER W R B V AS INIION SYSEM V W P B Z R C C B B B L L MILLIVOL AS VALVE H H PP PP L88J HERMOPILE CONROL CASE MUS BE CONNECED O EARH ROUND. USE ROUNDIN SCREW PROVIDED. REMOVE Z W JUMPER I SERIES 60 LIMI IS USED. WIRE LOW LIMI CONROLLER OR ZONE VALVES AS SHOWN. USE V (B B) CIRCUI ONLY OR V, CONNEC B B; USE JUMPERS Z W AND P Z. OR POWERPILE (MILLIVOL) AS VALVES, REMOVE JUMPER P Z; CONNEC (B B); DO NO REMOVE JUMPER Z W. ig.. ypical hookup for in millivolt or low volt, gas-fired system with L88J Aquastat Controller. USE COPPER CONDUCORS ONLY. OR ALL CLASS CONNECIONS, USE WIRE RAED OR A LEAS 67 (75 C). 5 POWER SUPPLY. PROVIDE DISCONNEC MEANS AND OVERLOAD PROECION AS REQUIRED. M08A ZONE ZONE 0 VA H H ZONE ZONE L L L L L ZC C C C C C C C C L (HO) L PUMP PUMP PUMP PUMP R PUMP 5 ZONE 5 ZC H H O APPROPRIAE CONNECIONS AS REQUIRED BY HE SYSEM. H-H YPICALLY CONNECED O - O CONROL SYSEM. CONROL CASE MUS BE CONNECED O EARH ROUND. USE ROUNDIN SCREW PROVIDED. USE COPPER CONDUCORS ONLY. OR ALL CLASS CONNECIONS, USE WIRE RAED OR A LEAS 67 (75 C). ig.. Zone expansion using additional R85 Hydronic Switching Relays. POWER SUPPLY. PROVIDE DISCONNEC MEANS AND OVERLOAD PROECION AS REQUIRED. CONNEC L-ZC JUMPER, I REQUIRED. M7A

11 A,B HYDRONIC ZONE PANELS WIH PRIORIY CONROL O EXPANSION ERMINALS ON ADDIIONAL PANELS I DESIRED 0 VA L L L L L ZC L L (HO) R85A 5 H H ZONE 5 ZONE 6 ZONE 7 ZONE 8 ZONE ZONE C C C C C C C C PUMP 5 PUMP 6 PUMP 7 PUMP VA L L L L L ZC L8A,C L L ZC H H ZONE ZONE ZONE ZONE C C C C C C C C PUMP PUMP PUMP PUMP C C BLACK B WHIE B R88 MOOR C55 ORANE INIER CONROL CASE MUS BE CONNECED O EARH ROUND. USE ROUNDIN SCREW PROVIDED. USE COPPER CONDUCORS ONLY. OR ALL CLASS CONNECIONS, USE WIRE RAED OR A LEAS 67 (75 C). POWER SUPPLY. PROVIDE DISCONNEC MEANS AND OVERLOAD PROECION AS REQUIRED. 5 6 I OAL CURREN EXCEEDS 7.A ULL LOAD ON HE MAIN PANEL, LIE O L8A,C MAY BE REDUCED. O MAINAIN LOW LIMI UNCION O HE AQUASA CONROL, ADD R85A SWICHIN RELAY AS SHOWN OR EACH PANEL ADDED. I OAL CURREN EXCEEDS 7.A ULL LOAD ON HE EXPANSION PANEL, LIE O R85A MAY BE REDUCED. M8B ig.. Zone expansion using additional Zone Panels

12 A,B HYDRONIC ZONE PANELS WIH PRIORIY CONROL O EXPANSION ERMINALS ON ADDIIONAL R8889 PANELS I DESIRED R8889 R- R- COM A B C 50VA L L L L H H L (HO) L R85A ES V V ZONE VALVE VALVE MANIOLD ZONE 5 ZONE 6 ZONE 7 ZONE 8 HERMOSAt 50VA V ES ES V V V ES V V V ES ES V V ZONE VALVE VALVE VALVE 6 5 V O EXPANSION ERMINALS ON ADDIIONAL PANELS I DESIRED 0 VA H H L L L L L ZC PUMP AQUASA CONROL L L ZONE ZONE HERMOSAt ZONE ZONE C C C C C C C C PUMP PUMP PUMP C C B B SYSEM CONROL CASE MUS BE CONNECED O EARH ROUND. USE ROUNDIN SCREW PROVIDED. USE COPPER CONDUCORS ONLY. OR ALL CLASS CONNECIONS, USE WIRE RAED OR A LEAS 90 C. POWER SUPPLY. PROVIDE DISCONNEC MEANS AND OVERLOAD PROECION AS REQUIRED. CONNEC A-A, B-B ON UNLIKE DEVICES ( O R8889); DO NO CONNEC C ERMINALS. CONNEC A-A, B-B, C-C ON LIKE DEVICES ( O OR R8889 O R8889). M50 ig. 5. Mixed mode zone expansion using, R8889, and R85 Switching Relay

13 A,B HYDRONIC ZONE PANELS WIH PRIORIY CONROL OPERAION Overview he Hydronic Circulator Zone Panel with Priority Control can control up to three or four (depending on model) zone circulator pumps. Additional zones may be added one at a time using an R85 Hydronic Switching Relay for each additional zone or three or four zones at a time using additional A or B Zone Panels, respectively. Line voltage power connected to L and L on the Panel provides power to the V transformer. his transformer provides Vac power to the Panel. A green light-emitting diode (LED) on the panel indicates that there is Vac power applied to the Panel. When a zone thermostat calls for heat during standard operation, the R and W terminals make for that zone thermostat. he relay for that zone is energized and the LED for that zone comes on. he burner relay is also energized and the H and H terminals make. he circulator relay for that zone is energized, providing line voltage between the C and C terminals, (energizing that zone circulator pump). Each zone operates in the same sequence described above. As long as any zone is calling for heat, the burner relay is energized. Priority Zoning Operation he allows Zone to be field-configured as a priority or non-priority zone. Zone is factory-set as a priority zone. (Refer to ig. for location and settings of the priority enable and burner control switches.) his feature is typically used in installations where indirect hot water tanks are installed. When configured in this manner, a call for heat from the priority zone disables the circulators on the other three zones, assuring maximum heat transfer to the hot water tank. Normal control of the non-prioritized zones returns when the priority zone call for heat ends. Since this feature is field-configurable, it can be disabled, giving equal priority to all four zones. Refer to ig. 7 (oil-fired) and ig. 0 (gas-fired) for typical wiring connections. Note that the LED for each zone remains on as long as a call for heat remains for that zone, even though the priority zone can cause its circulator relay to be de-energized. NOE When a power stealing thermostat is used in a nonpriority zone, the heat call LED for that zone illuminates slightly under the folowing conditions: he power stealing thermostat is in the O state. PRIORIY ENABLE is ON. he priority zone is calling for heat. Burner Control Operation he allows Zone burner control to be disabled. Zone is factory-set for normal burner control. (Refer to ig. for location and settings of the priority enable and burner control switches.) his feature may be used to prevent short cycling the boiler in installations where both small and large zones exist in close proximity. In these applications, if all zones have normal burner control, a call for heat from the small zone is satisfied quickly and the boiler short cycles. By switching the burner control from NORMAL to O, a call for heat results in only its circulator pump running. Often the latent heat in the boiler and pipes alone satisfies the small zone. If necessary, the larger zone brings on the boiler before too long due to the proximity of the zones. Cold Start Boiler Operation (ig. 7-0) he may be applied to boilers using either the L8 (high and low limit) or the L88 (high limit only) Aquastat Controllers. When using the L88, the boiler runs only when there is a call for heat from an external thermostat. ig. 7 through 0 illustrate typical wiring connections for this application. Do not remove the factory-installed jumper between the L and Zc terminals. ig. 8 illustrates a method of obtaining a fifth zone by using the Aquastat controller. Note that this hookup removes power from the thermostat whenever the limit opens. IMPORAN Do not use power stealing electronic thermostats in this application. Use battery powered thermostats or the 87 Round hermostat. ankless Coil Boiler Operation (ig. 5) When using the L8, the may be connected so all zone circulators are disabled when the low limit opens. his allows the boiler water to reach minimum temperature before transferring heat to any zones. his is acomplished as power to all of the circulator relay contacts goes to terminal Zc. Remove the factory-installed jumper between the L and Zc terminals. Connect the Zc terminal from the to the Zc terminal on the L8. When the L8 senses that the boiler is below the low limit, it removes power from the Zc terminal. o aid in troubleshooting, a green LED (LOW LIMI) is provided. his LED illuminates whenever the power to the circulator relay contacts is available from the Zc terminal

14 A,B HYDRONIC ZONE PANELS WIH PRIORIY CONROL Expansion Expansion Using an Aquastat Control (ig. 8) Control of a fifth zone can be obtained by using an Aquastat control. his hookup causes additional wear on the Aquastat low limit because the switch must remove power from all the circulators in the system when it switches off to allow the boiler temperature to recover. Zone expansion using additional s or R85 Switching Relays is recommended. NOE: his hookup removes power from the thermostat whenever the limit opens. Do not use power stealing electronic thermostats. Use battery powered thermostats or the 87 Round hermostat. Expansion Using R85 Switching Relays (ig.) he can be expanded one zone at a time by using R85 Switching Relays. he priority zone is not maintained in this hookup. Expansion Using Additional s or R8889s (ig.-5) he can be expanded thress or four zones at a time using additional or R8889 Zone Panels. Up to four zone panels ( to 6 zones total) may be added to a system. Connect the system burner to the burner terminals on the Aquastat Control. When using the additional zone panels, the priority zone is maintained. he burner control function on Zone of the is not affected during expansion. When wiring additional s, connect the wires from the three expansion terminals (A,B,C) on one zone panel to the expansion terminals on the next zone panel. or each panel added, connect an R85A as shown in ig. to maintain the low limit function. Run wires through the knockouts on the sides of the zone panels (see ig. ). When running a mixed mode system (-R8889 combination), connect an R85A as shown in ig. 5. Connect the wires from the expansion terminals (A,B,C) on one zone panel to the expansion terminals (A,B,C) on the next zone panel. Connect A to A, B to B, and C to C on like panels ( connected to, R8889 connected to R8889). Do not connect the C terminals when connecting an to an R8889. When using multiple panels, set the PANEL YPE switch on one panel to the MAIN position. Zone on this panel is the priority zone for the system. Set the other panels to the EXPANSION position. Set the PRIORIY ENABLE switch to the same position on all panels. hermostat Compatibility he is compatible with both electromechanical and electronic thermostats. In the thermostat Off state, the allows up to 0.A to be drawn, satisfying the trickle charge requirement of power-stealing electronic thermostats. In the thermostat On state, the provides 0.A to satisfy the anticipator current requirement of all electromechanical and many electronic thermostats. SERVICE AND CHECKOU CAUION Disconnect power supply before removing cover for servicing to prevent electrical shock or equipment damage.. Remove the cover.. With the cover removed, reconnect power to Zone Panel.. Check for power across L and L terminals using a voltmeter.. Check that green Vac power LED lights, indicating Vac power to low voltage circuit. CAUION If transformer fails and LED does not light, line voltage can continue to be present at L and L terminals. Check for power using a voltmeter. 5. If the transformer is determined defective, replace it with Honeywell part no. A0A. 6. During checkout, jumper thermostat R-W terminals on separately for each zone. he green LED for that zone lights, simulating a call for heat from the zone thermostat

15 A,B HYDRONIC ZONE PANELS WIH PRIORIY CONROL ROUBLESHOOIN Check all wiring connections. Check out system components according to equipment manufacturer instructions. o perform troubleshooting, remove the cover from the panel. A zone thermostat is calling for heat, but there is no heat.. Check power indicator LED.. Check for power (0 volts) at XMR PRI. L-L terminals.. Check zone thermostat (green) indicator LED.. Check burner operation. Power LED is on.. o to step. 0 volts are present at XMR PRI. L-L.. Check for volts at R-C terminals. If volts are not present at terminals, tighten the wiring connections and recheck. If volts continue to be absent, transformer is defective. Replace the transformer with part no. A0A. Zone LED is on.. o to Step. Burner LED is on. System Burner is off. a. Jumper H, H terminals. b. If burner starts, burner relay is defective. Replace part no. 086 Burner Relay. Recheck. If burner does not start, replace. c. If the system burner does not start, there is a problem with the external burner circuit. Check Aquastat Controller according to the manufacturer instructions. Burner LED is not on. System Burner is off. a. Set the CONROL switch on zone only to NORMAL. Make sure the wiring between the expansion terminals is correct. If the system burner does not start, replace. CAUION Although the green LED ( Vac power) is not lit with the power connected, line voltage may be present at L and L terminals if the LED is defective. Check for power across L and L terminals using a voltmeter only. Power LED is not on.. o to step. 0 volts are not present at XMR PRI. L-L. a. Check for 0 Volts at 0 Vac L-L. If 0 volts are present, replace. b. If 0 volts are not present at 0 Vac L-L, check main power and wiring connections. Zone LED is not on.. Jumper R,W terminals (for one zone) on the to simulate a call for heat. If the zone LED does not turn on, replace. If the zone LED turns on, check the current draw between the R and W terminals. If 90 to 50 ma ac is measured with L-L at 0 Vac, there is a problem with the thermostat or the wiring to the thermostat. Check the thermostat and thermostat wiring. If 90 to 50 ma ac is not measured with L-L at 0 Vac, replace. Burner LED is on. System Burner is on. a. Check for 0 volts at C, C terminals for the zone that is calling for heat. If 0 volts are present, the problem is with the circulator pump. Check the pump for that zone. b. If 0 volts are not present, check the LOW LIMI LED. If the LED is on, make sure that the wiring between the expansion terminals is correct. c. If the wiring is correct, the circulator pump relay is defective. Replace part no. 086 Circulator Pump Relay. Recheck. If 0 volts continue to be absent, replace. d. If the LOW LIMI LED is off, jumper the low limit (L-ZC) terminals. If the LED turns on, there is a problem with the external low limit circut. If the LED does not turn on, replace

16 A,B HYDRONIC ZONE PANELS WIH PRIORIY CONROL A zone thermostat is not calling for heat, but there is heat.. Check burner operation. Burner LED is not on. System Burner is on. a. Remove burner relay. If the system turns off, burner relay is defective. Replace part no. 086 Burner Relay. b. If the system burner is on, remove the field wire from H terminal. If the system burner is still on, the problem is with the external system burner circuit. If system burner turns off, replace. Home and Building Control Honeywell Inc. Honeywell Plaza P.O. Box 5 Minneapolis MN Honeywell Latin American Region 80 Sawgrass Corporate Parkway Suite 00 Sunrise L 5 Home and Building Control Honeywell Limited-Honeywell Limitée 55 ordon Baker Road North York, Ontario MH N7 Honeywell Europe S.A. Avenue du Bourget 0 Brussels Belgium Honeywell Asia Pacific Inc. Room -5 Sun Hung Kai Centre No. 0 Harbour Road Wanchai Hong Kong Helping You Control Your World C.H. Rev Printed in U.S.A. 6