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Installation, Operation and 

Maintenance 

 

   DLSC-IOM-1.0 

4-23-20 

 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Low Profile, Series FanPowered Terminal Unit with 

Sensible Cooling Coil 

 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
 

Model: DLSC Rev A 

 

 

 

This IOM is meant to demonstrate general dimensions and information of this product. The drawings are not meant to detail every aspect of the product. Drawings are not to scale. 

Titus reserves the right to make changes without written notice. 

All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or by any information storage retrieval system without permission in writing from Tomkins Industries, Inc. 

Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, 
and air-conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or 
altered equipment by an unqualified person could result in death or serious injury. When working on the equipment, observe all 
precautions in the literature and on the tags, stickers, and labels that are attached to the equipment. 

SAFETY WARNING 

Summary of Contents for DLSC

Page 1: ...by any means electronic or mechanical including photocopying and recording or by any information storage retrieval system without permission in writing from Tomkins Industries Inc Only qualified personnel should install and service the equipment The installation starting up and servicing of heating ventilating and air conditioning equipment can be hazardous and requires specific knowledge and trai...

Page 2: ...operty damage only Personal Protective Equipment PPE Required Installing servicing this unit could result in exposure to electrical mechanical and chemical hazards Before installing servicing this unit technicians MUST put on all Personal Protective Equipment PPE recommended for the work being undertaken ALWAYS refer to appropriate MSDS sheets and OSHA guidelines for proper PPE When working with o...

Page 3: ...ystems with or without electric heat one hydronic circuit four pipe system two hydronic circuits or four pipe with standby electric heating The unit mounted low voltage 24 VAC 50VA Class II transformer provides low voltage to the ECM motor controls and connections field mounted controller damper actuator See Figure 1 for unit components FIGURE 1 LSC Unit Major Components ECM Motor EcoShield Liner ...

Page 4: ...nee Notify your Titus representative of the damage and arrange for repair Have the carrier inspect the damage before making any repairs to the unit Compare the electrical data on the unit nameplate with the ordering and shipping information to verify the correct unit is received Jobsite Storage This unit is intended for indoor use only Store the unit indoors to protect the unit from damage due to ...

Page 5: ...iping locations by facing the front of the unit airflow discharges from the front The control panel is always on the opposite the piping Pre Installation Checklist Complete the following checklist before beginning unit installation Verify the unit size and tagging with the unit nameplate Make certain the ceiling is solid and sufficient to support the unit and accessory weights Allow minimum recomm...

Page 6: ...commended Fuse The AIR FLOW label lists Model Number Unit Size Factory Order Number TAG Location indicates the engineer s planned location for the unit to be installed There may be other labels attached to the unit as options or codes may require If you have any questions please contact the local TITUS Representative for clarification Have the key points from the Air Flow label available for refer...

Page 7: ...pply and return piping should not interfere with the drip pan Supply connection should always be at the bottom of the coil and return at the top An Air Vent valve must be installed at the highest point of the water coil to allow removal of air pockets inside the coil The installer must provide adequate piping system filtration and water treatment Solder the joints using bridgit lead free solder AS...

Page 8: ...llation procedure below 1 Prepare the ceiling opening for recessed units Reference the unit submittals for dimensions 2 Position and install the suspension rods or a suspension device supplied by installer according to the unit modeland size in submittal 4 Level the unit by referencing the chassis end panels Adjust the suspension device 5 Complete piping and wiring connections in addition to any n...

Page 9: ...f units meets the national Fire Protection Association N F P A Standard 90A or 90B concerning the use of concealed ceiling spaces as return air plenums Verify correct ceiling opening dimensions on unit submittals Secure the unit and any accessory items properly to the ceiling support rods 6 Complete all piping connections correctly 7 Check field sweat connections for leaks and tighten the valve st...

Page 10: ...uctive loads or RF transmitters may cause radio frequency interference RFI In addition improper separation may cause electrical noise problems Therefore use shielded wire Belden 83559 83562 or equivalent in applications that require a high degree of noise immunity Connect the shield to the chassis ground and tape at the other end Note Do not connect any sensor or input circuit to an external groun...

Page 11: ... should be installed where required 3 The LSC unit is equipped with either a manual control or a remote control PWM fan speed controller mounted on the side of the line voltage control enclosure A Remote Signal PWM Controller ECM motors shipped with remote PWM controller require a signal from the DDC controller to control fan speed B Manual Unit PWM Controller ECM motors with manual PWM controller...

Page 12: ...t and monitor General Electric s ECM Motor The interface board provides remote adjustment of the ECM output from 0 to 100 of the programmed control range A signal lamp on the control continuously flashes out the flow index2 Instruments are not required to read the flow index A 0 10Vdc signal connects RPM to the automation control Jumpers allow the Interface to be configured for 0 10Vdc automation ...

Page 13: ...d air balance can be achieved using the DDC Controller software tools Please notice that a control signal less than 0 2Vdc may put the interface board into manual override Avoid setting the DDC signal to less than 0 2Vdc Cycle Power ON OFF for faster lockout Removal Manual Air Balance The interface board can be manually adjusted before the DDC Controller signal is available The balancer s manual a...

Page 14: ...t Piping 1 Properly vent the hydronic coil to allow waterflow through the unit 2 Tighten all pipe connections adequately 3 Set water flow to the unit properly if unit piping hasthe circuit setter valve installed by others 4 Check strainers if installed by others for debris after apply system water 5 Ensure the drip pan is not obstructed Remove any foreign matter that mayhave fallen into the drip p...

Page 15: ...ng experience Cleaning frequently is dependent upon system operating hours filter maintenance and efficiency and dirt load Follow the suggested methods in the following paragraphs Live Electrical Components During installation testing servicing and troubleshooting of this product it may be necessary to work with live electrical components Have a qualified licensed electrician or other individual w...

Page 16: ...d bottom edges of fan blower Work Instruction Steps In general replacement of a motor needs to be carried out as follows 1 Remove front panels of unit 2 Free the motor and crossover harnesses from the fan board by unplugging the two electric multi plugs from the motor Depress Locking tabs 3 Remove the fan housing with the motor and loosen fan Allen screw on the shaft 4 Unscrew the motor from the f...

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