Instruction/ maintenance manual of the product T775J Honeywell
Go to page of 20
PRODUCT DA T A Copyright © 1995 Honeywell Inc. • All Rights Reserved T775J Electronic Remote T emperature Controller FEA TURES • T775 model pro vides reset control with tw o temperature inputs an.
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 2 SPECIFICA TIONS IMPORT ANT The specifications given in this publication do not include normal manufacturing tolerances. Therefore, an individual unit may not exactly match the listed specifications.
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 3 Mounting: Mounts on any suitable horizontal or vertical surface. (See Fig. 5 for mounting hole locations.) Dimensions: See Fig. 1. Display Resolution: Sensed temperature and other operating parameters are displayed via a liquid crystal display (LCD) with a resolution of 1 ° F or 1 ° C.
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 4 Mounting Sensor in T7047C1090 Case 쐃 Run wires from T775J through wall. 쐇 Mount case to wall with screws provided. 쐋 Connect wires from the T775J to two T terminals on the T7047C Case.
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 5 Fig. 5. Feature locations. IMPORT ANT Erratic temperature readings from the 193987GA Sensor can be caused by poor wiring practices that must be avoided to assure proper operation: a. Do not route temperature sensor wiring with building power wiring.
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 6 SELECT SET ENTER NO COM NC OUTPUT 1 OUTPUT 2 NO COM NC 120V COM 240V 1 2 3 4 SA SB 1 23 1 2 3 4 5 67 8 SA TOD 24V SB C/F M8113 SENSOR A 240 VAC SENSOR B LOAD 1 LOAD 2 BLK RED Fig. 7. Reset control with 24 V ac input, 24 V ac loads.
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 7 SELECT SET ENTER OUTPUT 2 NO COM NC 120V COM 240V 1 2 3 4 SA SB 1 23 1 2 3 4 5 67 8 SA TOD 24V SB C/F M8115A SENSOR A 24 VAC SENSOR B LOAD 1 T1 T2 BR W 1 1 POWER INPUT USE SEPARATE TRANSFORMER FOR T775 WHEN POWERING FROM 24 VOLTS.
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 8 Fig. 14. Reset control with Series 90 Modutr ol® Motor . Fig. 13. Reset control with 240 V ac input, 240 V ac and 0 to 18 Vdc loads.
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 9 Use shielded cable if any of the above conditions cannot be avoided. Device Setup 쐃 Determine the loads to be controlled and the operating mode (heat or cool) and enter on the worksheet.
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 10 쐄 Determine the desired Reset Direction (up or down) and enter on the Device Programming Worksheet. This will determine if the setpoint for the control Sensor A will be reset up or down.
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 11 쐎 Press Enter to enter the displayed value into memory . 쐅 Press Select four times to return to stage 1 parameters. Scroll through the programming loop a second time to confirm that the appropriate values have been entered into memory .
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 12 SELECT SET ENTER O P E N 1234 38 1 4 17 OPEN CLOSED VOLTAGE SPANS WHEN SWITCH IS DEPRESSED, THE VOLTAGE RANGE IDENTIFIED BY THE VOLTAGE SPAN BELOW THAT SWITCH IS SELECTED. IN THIS CASE, A VOLTAGE SPAN ON 8 VDC HAS BEEN SELECTED.
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 13 SENSED TEMPERATURE = 78 o F CALIBRATION SETPOINT 75 o F DEAD BAND DEAD BAND MODULATION HEATING MODE THROTTLING RANGE THROTTLING RANGE * D.
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 14 temperature goes down, the control point goes down). The type of ratio is selected by using the two DIP switches provided. The four possible reset operating configurations are illustrated and explained in Fig.
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 15 • 4-20 mA: This is a general purpose current mode output that can drive a 600 ohm maximum load without output current 12 3 4 OPEN A C B D 12 3 4 OPEN A C B D 12 3 4 OPEN A C B D 12 3 4 OPEN A C B D A.
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 16 degradation. This modulation output can be used with Honeywell Inc Modutrol IV TM Motors that accept an input signal of 4-20 mA or other Honeywell Inc motors with the use of resistor kits.
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 17 Display Once power is applied or restored to the device, the display will count down from 210 until the display reads zero, during which time any previously energized outputs will be de- energized.
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 18 CHECKOUT After the controller is installed and wired, apply power . Using the programmed control values, verify device operation after completing T able 3. 쐃 As illustrated in the example, record the sensed temperatures for both Sensor A and Sensor B as displayed on the controller .
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 19 Ta b le 3. Check out T able . Checkout Table Checkout Table Example Heat or Cool Load 1 Load 2 Reset Value Load 1 Reset Value Load 2 Heat.
T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 20 Helping You Control Your World Home and Building Control Honeywell Limited-Honeywell Limitée 740 Ellesmere Road Scarborough, Ontario M1P 2V9 63-2248—4 Rev . 9-95 Printed in U.S.A. www .
An important point after buying a device Honeywell T775J (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Honeywell T775J yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Honeywell T775J - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Honeywell T775J you will learn all the available features of the product, as well as information on its operation. The information that you get Honeywell T775J will certainly help you make a decision on the purchase.
If you already are a holder of Honeywell T775J, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Honeywell T775J.
However, one of the most important roles played by the user manual is to help in solving problems with Honeywell T775J. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Honeywell T775J along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
